CN106405421A - Battery state-of-charge (SOC) value evaluation method and device - Google Patents
Battery state-of-charge (SOC) value evaluation method and device Download PDFInfo
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- CN106405421A CN106405421A CN201510446190.4A CN201510446190A CN106405421A CN 106405421 A CN106405421 A CN 106405421A CN 201510446190 A CN201510446190 A CN 201510446190A CN 106405421 A CN106405421 A CN 106405421A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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Abstract
The present invention provide a battery SOC value evaluation method and device, wherein the method comprises the steps of detecting whether a battery is located in a charging state or a discharging state; on the condition that the battery is located in the charging state or the discharging state, determining the SOC value of the battery via an ampere-hour integral method; when the battery is not in the charging state and the discharging state, and on the condition that a charging loop or a discharging loop of the battery is disconnected, determining the SOC value according to a correspondence relation of the battery open circuit voltage of the battery and the SOC value. According to the present invention, the problem that the accuracy of the SOC value valuated by the battery SOC evaluation method is not high is solved, and the SOC evaluation precision is improved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of evaluation method of battery charge state SOC value and dress
Put.
Background technology
Communication power supply is the equipment providing energy for communication apparatus such as communication base station or communications equipment rooms, and accumulator is communication
The important component part of power supply, can be communication equipment provide backup power supply.In recent years, with every country, energy-conservation is subtracted
Row and development low-carbon economy are increasingly paid attention to, and LiFePO4 (LiFePO4) battery has been obtained increasingly with its unique advantage
It is widely applied.Ferric phosphate lithium cell compare before wide variety of lead-acid battery always, have have extended cycle life, high temperature
The advantages such as performance is good, Large Copacity, memory-less effect, lightweight, environmental protection, are therefore quickly promoted in multiple fields
Use with good, such as communication power supply energy storage device, new forms of energy energy storage device, Large Electric car, Medical Instruments etc..
With the popularization of ferric phosphate lithium cell application, battery management system is also widely used, in order to give full play to
The power performance of battery, improve its use safety, prevent over-charging of battery and cross put, extend battery service life,
Improve it as the serviceability of energy storage device, battery management system need the state-of-charge to battery (State-of-Charge,
Abbreviation SOC) accurately estimated, SOC is used to describe and can be filled with during battery uses and release the important of capacity
Reference factor.The SOC of battery is relevant with several factors, such as temperature, electric current, life-span, electrochemical effect etc., and has
There is very strong non-linear relation, bring very big difficulty to the estimation of SOC real-time online.
The evaluation method of the battery SOC in correlation technique mainly has：Ampere-hour integration method, open circuit voltage method, Kalman's filter
Ripple, internal resistance method, artificial neural network etc..Wherein artificial neural network method, Kalman filtering method are complicated because system is arranged,
And hardware configuration is required higher in battery management system, it is not widely used；Internal resistance method has estimation
The difficulty of internal resistance, is difficult on hardware；Open circuit voltage method need use open-circuit voltage, need set of cells long when
Between stand, General System do not possess static conditions.Comparatively speaking, ampere-hour integration method is due to simply effectively and being often used,
But ampere-hour integration method is due to may only consider the integration of Current versus time, or in conjunction with dynamic discharge curve, capacity may be entered
Row is revised, but performance graph is affected by factors such as temperature, electric current, life-spans, the battery SOC therefore estimating out
Also inaccurate.
For the not high problem of the SOC accuracy of the battery SOC evaluation method estimation in correlation technique, not yet carry at present
Go out effective solution.
Content of the invention
The invention provides a kind of evaluation method of battery charge state SOC value and device, at least to solve correlation technique
The not high problem of the SOC accuracy of middle battery SOC evaluation method estimation.
According to one embodiment of present invention, there is provided a kind of evaluation method of battery charge state SOC value, including：
Whether detection battery is in charged state or discharge condition；In the case that battery is in charged state or discharge condition,
Determine the state-of-charge SOC value of battery by ampere-hour integration method；It is not at charged state and discharge condition in battery, and
In the case that charge circuit in battery disconnects or discharge loop disconnects, the battery open circuit voltage according to battery and SOC
The corresponding relation of value determines state-of-charge SOC value.
In embodiments of the present invention, determine whether battery is in charged state or discharge condition in the following manner：Detection
Whether the electric current of battery is more than predetermined threshold；Electric current be more than predetermined threshold in the case of, battery be in charged state or
Discharge condition.
In embodiments of the present invention, in the case that the charge circuit of battery disconnects, corresponding relation is for indicating battery
The charging open circuit voltage curve of the corresponding relation of charging open-circuit voltage and SOC value；The feelings disconnecting in the discharge loop of battery
Under condition, corresponding relation is the electric discharge open-circuit voltage for indicating the electric discharge open-circuit voltage of battery and the corresponding relation of SOC value
Curve.
In embodiments of the present invention, charging open circuit voltage curve obtains in the following manner：In the charging process of battery,
Every the charging open-circuit voltage values of one group of SOC value of the first scheduled time segment record and battery, wherein, two adjacent pre-
Fix time and between section, be provided with the time of repose section stopping that battery is charged；Multigroup SOC value according to record and electricity
The charging open-circuit voltage values in pond fit to charging open circuit voltage curve；Electric discharge open circuit voltage curve obtains in the following manner：
In the complete discharge process of battery, every the electric discharge open-circuit voltage of one group of SOC value of the second scheduled time segment record and battery
Value, wherein, is provided with the time of repose section stopping that battery is discharged between two adjacent predetermined amount of time；According to
The electric discharge open-circuit voltage values of multigroup SOC value of record and battery fit to electric discharge open circuit voltage curve.
In embodiments of the present invention, the method also includes：In such a way to charging open circuit voltage curve or electric discharge open circuit
Voltage curve is modified：According to the power consumption of battery institute access device, charging open circuit voltage curve is modified or to putting
Opens voltage curve is modified.
In embodiments of the present invention, in the case that the charge circuit of battery disconnects, battery open circuit voltage according to battery and
The corresponding relation of SOC value determines that state-of-charge SOC value includes：Search the charging open circuit that the current voltage value of battery falls into
The first interval on voltage curve；To two groups of SOC value corresponding to 2 points corresponding to the first interval and electricity
The charging open-circuit voltage in pond adopts linear difference algorithm to calculate the corresponding SOC value of current voltage value；Return in the electric discharge of battery
In the case that road disconnects, the battery open circuit voltage according to battery and the corresponding relation of SOC value determine state-of-charge SOC value
Including：Search the second interval discharging on open circuit voltage curve that the current voltage value of battery falls into；To the second value
The electric discharge open-circuit voltage of corresponding to 2 points two groups of SOC value corresponding to interval and battery adopts linear difference algorithm to calculate
The corresponding SOC value of current voltage value.
In embodiments of the present invention, the corresponding relation of the battery open circuit voltage according to battery and SOC value determines state-of-charge
After SOC value, the method also includes：After the 3rd scheduled time, if charge circuit is still turned off, according to charging
Open circuit voltage curve was modified to SOC value every the 4th scheduled time；Or, after the 5th scheduled time, if
Discharge loop is still turned off, then SOC value is modified every the 6th scheduled time according to electric discharge open circuit voltage curve.
According to another embodiment of the present invention, there is provided a kind of estimation device of battery charge state SOC value, including：
Detection module, for detecting whether battery is in charged state or discharge condition；First determining module, for described
The state-of-charge SOC of battery in the case that battery is in charged state or discharge condition, is determined by ampere-hour integration method
Value；Second determining module, for being not at charged state and discharge condition in battery, and the charge circuit in battery disconnects
Or in the case that discharge loop disconnects, battery open circuit voltage according to battery and the corresponding relation of SOC value determine charged
State SOC value.
In embodiments of the present invention, detection module be additionally operable to determine in the following manner battery whether be in charged state or
Discharge condition：Whether the electric current of detection battery is more than predetermined threshold；In the case that electric current is more than predetermined threshold, at battery
In charged state or discharge condition.
In embodiments of the present invention, in the case that the charge circuit of battery disconnects, corresponding relation is for indicating battery
The charging open circuit voltage curve of the corresponding relation of charging open-circuit voltage and SOC value；The feelings disconnecting in the discharge loop of battery
Under condition, corresponding relation is the electric discharge open-circuit voltage for indicating the electric discharge open-circuit voltage of battery and the corresponding relation of SOC value
Curve.
In embodiments of the present invention, charging open circuit voltage curve obtains in the following manner：In the charging process of battery,
Every the charging open-circuit voltage values of one group of SOC value of the first scheduled time segment record and battery, wherein, two adjacent pre-
Fix time and between section, be provided with the time of repose section stopping that battery is charged；Multigroup SOC value according to record and electricity
The charging open-circuit voltage values in pond fit to charging open circuit voltage curve；Electric discharge open circuit voltage curve obtains in the following manner：
In the complete discharge process of battery, every the electric discharge open-circuit voltage of one group of SOC value of the second scheduled time segment record and battery
Value, wherein, is provided with the time of repose section stopping that battery is discharged between two adjacent predetermined amount of time；According to
The electric discharge open-circuit voltage values of multigroup SOC value of record and battery fit to electric discharge open circuit voltage curve.
In embodiments of the present invention, this device also includes：Correcting module, in such a way to charging open-circuit voltage
Curve or electric discharge open circuit voltage curve are modified：According to the power consumption of battery institute access device, charging open circuit voltage curve is entered
Row is revised or electric discharge open circuit voltage curve is modified.
In embodiments of the present invention, the second determining module includes：First searching unit, breaks for the charge circuit in battery
In the case of opening, search the first interval on the charging open circuit voltage curve that falls into of current voltage value of battery；First
Computing unit, for the charging open circuit to two groups of SOC value corresponding to 2 points corresponding to the first interval and battery
Voltage adopts linear difference algorithm to calculate the corresponding SOC value of current voltage value；Second determining module also includes：Second looks into
Look for unit, in the case of disconnecting in the discharge loop of battery, search the electric discharge open circuit that the current voltage value of battery falls into
The second interval on voltage curve；Second computing unit, for corresponding to 2 points corresponding to the second interval
Two groups of SOC value and battery electric discharge open-circuit voltage adopt linear difference algorithm calculate the corresponding SOC value of current voltage value.
In embodiments of the present invention, this device also includes correcting module, for the battery open circuit voltage according to described battery and
After the corresponding relation of described SOC value determines described state-of-charge SOC value, after the 3rd scheduled time, if described
Charge circuit is still turned off, then described SOC value is repaiied every the 4th scheduled time according to charging open circuit voltage curve
Just；Or, after the 5th scheduled time, if described discharge loop is still turned off, according to described electric discharge open-circuit voltage
Curve was modified to described SOC value every the 6th scheduled time.
By the present invention, in the case of being in described charged state or described discharge condition in battery, by ampere-hour
Integration method determines the state-of-charge SOC value of described battery, disconnects in the charge circuit of described battery or discharge loop breaks
In the case of opening, the battery open circuit voltage according to described battery and the corresponding relation of described SOC value determine described charged shape
State SOC value, ampere-hour integration method and open circuit voltage method will be combined and SOC is determined, increased SOC's
Straightener meeting, solves the problems, such as that the SOC accuracy of battery SOC evaluation method estimation is not high, improves SOC's
Estimation precision.
Brief description
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, the present invention
Schematic description and description be used for explaining the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of the evaluation method of battery charge state SOC value according to embodiments of the present invention；
Fig. 2 is the structured flowchart one of the estimation device of battery charge state SOC value according to embodiments of the present invention；
Fig. 3 is the structured flowchart two of the estimation device of battery charge state SOC value according to embodiments of the present invention；
Fig. 4 a is electric discharge open circuit curve OCV-SOC according to the preferred embodiment of the inventiondischg 1Schematic diagram；
Fig. 4 b is the open circuit curve OCV-SOC that charges according to the preferred embodiment of the inventionchg 1Schematic diagram；
Fig. 5 a is electric discharge open circuit curve OCV-SOC according to the preferred embodiment of the inventiondischgSchematic diagram；
Fig. 5 b is the open circuit curve OCV-SOC that charges according to the preferred embodiment of the inventionchgSchematic diagram；
Fig. 6 is that FBMS according to the preferred embodiment of the invention estimates flow chart to the SOC of ferric phosphate lithium cell.
Specific embodiment
To describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that in the feelings do not conflicted
Under condition, the embodiment in the application and the feature in embodiment can be mutually combined.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, " second "
Etc. being for distinguishing similar object, without for describing specific order or precedence.
Provide a kind of evaluation method of battery charge state SOC value in the present embodiment, Fig. 1 is real according to the present invention
The flow chart applying the evaluation method of battery charge state SOC value of example, as shown in figure 1, this flow process comprises the steps：
Step S102, whether detection battery is in charged state or discharge condition；
Step S104, in the case that battery is in charged state or discharge condition, determines electricity by ampere-hour integration method
The state-of-charge SOC value in pond；
Step S106, is not at charged state and discharge condition in battery, and the charge circuit in battery disconnects or puts
In the case that The electric loop disconnects, the battery open circuit voltage according to battery and the corresponding relation of SOC value determine state-of-charge
SOC value.
By above-mentioned steps, in the case of being in described charged state or described discharge condition in battery, by peace
When integration method determine the state-of-charge SOC value of described battery, disconnect or discharge loop in the charge circuit of described battery
In the case of disconnection, battery open circuit voltage according to described battery and the corresponding relation of described SOC value determine described charged
State SOC value, ampere-hour integration method and open circuit voltage method will be combined and SOC is determined, increased SOC
Straightener meeting, solve the problems, such as battery SOC evaluation method estimation SOC accuracy not high, improve SOC
Estimation precision.
It should be noted that the executive agent of said method can be the management system of battery, can be battery and battery
A third party device outside management system.
In embodiments of the present invention, can determine whether battery is in charged state or discharge condition in the following manner：
Whether the electric current of detection battery is more than predetermined threshold；In the case that electric current is more than predetermined threshold, battery is in charged state
Or discharge condition.Can also judge whether battery is in charged state or discharge condition in other way, such as,
The voltage of detection battery is judging.It should be noted that passing through in the present embodiment to detect the electric current of battery whether more than pre-
Determine threshold value and come whether certain battery is in normal charging and discharging state, to judge whether to estimate using ampere-hour integration method
SOC value, this Rule of judgment does not simultaneously differentiate between battery and is in normal charged state or normal discharge condition.
In embodiments of the present invention, above-mentioned corresponding relation can be the mapping table of battery open circuit voltage and SOC value,
Can also be the curve representing battery open circuit voltage and SOC value corresponding relation, in embodiments of the present invention, when above-mentioned right
When should be related to the curve for battery open circuit voltage and SOC value corresponding relation, in the case that the charge circuit of battery disconnects,
Corresponding relation is the charging open circuit voltage curve for indicating the charging open-circuit voltage of battery and the corresponding relation of SOC value；
In the case that the discharge loop of battery disconnects, corresponding relation is for indicating the electric discharge open-circuit voltage of battery and SOC value
Corresponding relation electric discharge open circuit voltage curve.
In embodiments of the present invention, charging open circuit voltage curve obtains in the following manner：In the charging process of battery,
Every the charging open-circuit voltage values of one group of SOC value of the first scheduled time segment record and battery, wherein, two adjacent pre-
Fix time and between section, be provided with the time of repose section stopping that battery is charged；Multigroup SOC value according to record and electricity
The charging open-circuit voltage values in pond fit to charging open circuit voltage curve；Electric discharge open circuit voltage curve obtains in the following manner：
In the complete discharge process of battery, every the electric discharge open-circuit voltage of one group of SOC value of the second scheduled time segment record and battery
Value, wherein, is provided with the time of repose section stopping that battery is discharged between two adjacent predetermined amount of time；According to
The electric discharge open-circuit voltage values of multigroup SOC value of record and battery fit to electric discharge open circuit voltage curve.
In embodiments of the present invention it is considered to be the charging open-circuit voltage values of SOC value and battery after battery standing correspondence
Relation is come the charging open circuit voltage curve to obtain, and the charging open-circuit voltage values of SOC value and battery after battery standing
Corresponding relation come the electric discharge open circuit voltage curve to obtain, and because the internal-response of battery after standing tends towards stability state, because
And the curve obtaining with respect to dynamical fashion of the prior art, interference factor is less, thus the charging open-circuit voltage obtaining
Curve or electric discharge open circuit voltage curve are relatively accurate, and then improve the accuracy of SOC estimation.
In order to be closer to practical situations so that SOC estimation is more accurate, in embodiments of the present invention, should
Method also includes：In such a way charging open circuit voltage curve or electric discharge open circuit voltage curve are modified：According to electricity
The power consumption of pond institute access device is modified to charging open circuit voltage curve or electric discharge open circuit voltage curve is modified.
The loss of access device, the veneer of such as battery management system or the power consumption of protection circuit is considered in open circuit voltage method
Situation, obtains charging open circuit voltage curve or the electric discharge open circuit voltage curve more conforming to actual condition, and then improves
The accuracy of SOC estimation.
In embodiments of the present invention, in the case that the charge circuit of battery disconnects, battery open circuit voltage according to battery and
The corresponding relation of SOC value determines that state-of-charge SOC value includes：Search the charging open circuit that the current voltage value of battery falls into
The first interval on voltage curve；To two groups of SOC value corresponding to 2 points corresponding to the first interval and electricity
The charging open-circuit voltage in pond adopts linear difference algorithm to calculate the corresponding SOC value of current voltage value；Return in the electric discharge of battery
In the case that road disconnects, the battery open circuit voltage according to battery and the corresponding relation of SOC value determine state-of-charge SOC value
Including：Search the second interval discharging on open circuit voltage curve that the current voltage value of battery falls into；To the second value
The electric discharge open-circuit voltage of corresponding to 2 points two groups of SOC value corresponding to interval and battery adopts linear difference algorithm to calculate
The corresponding SOC value of current voltage value.
In the above embodiment of the present invention, can in a certain order such as time sequencing or according to magnitude of voltage from little to
Big order etc. searches current voltage drops into which area on charging open circuit voltage curve or electric discharge open circuit voltage curve
Between in, linear difference is carried out to 2 points in this interval, calculates the corresponding SOC value of this current voltage value.Need explanation
, 2 points of this interval can take two end points in this interval it is also possible to take two in interval according to certain rule
Point or two points taking this interval at random.
In embodiments of the present invention, the corresponding relation of the battery open circuit voltage according to battery and SOC value determines state-of-charge
After SOC value, the method also includes：After the 3rd scheduled time, if charge circuit is still turned off, according to charging
Open circuit voltage curve was modified to SOC value every the 4th scheduled time；Or, after the 5th scheduled time, if
Discharge loop is still turned off, then SOC value is modified every the 6th scheduled time according to electric discharge open circuit voltage curve.
After determining state-of-charge SOC value, after the 3rd scheduled time or the 5th ticket reserving time, loop is still turned off,
Carry out the revision of a SOS every the 4th ticket reserving time or the 6th ticket reserving time, by the SOC determining after then
The increase of the times of revision of value is so that the SOC of estimation is more accurate.
It should be noted that above-mentioned 3rd scheduled time and above-mentioned 5th scheduled time can identical it is also possible to differ；
Above-mentioned 4th scheduled time and above-mentioned 6th scheduled time can identical it is also possible to differ.
Additionally provide a kind of estimation device of battery charge state SOC value in the present embodiment, this device is used for realizing
State embodiment and preferred implementation, carry out repeating no more of explanation.As used below, term " module "
The software of predetermined function and/or the combination of hardware can be realized.Although the device described by following examples is preferably with soft
Part is realizing, but hardware, or the realization of the combination of software and hardware is also may and to be contemplated.
Fig. 2 is the structured flowchart one of the estimation device of battery charge state SOC value according to embodiments of the present invention, such as Fig. 2
Shown, this device includes：
Detection module 22, for detecting whether battery is in charged state or discharge condition；
First determining module 24, is connected with detection module 22, for being in charged state or electric discharge shape in described battery
The state-of-charge SOC value of battery in the case of state, is determined by ampere-hour integration method；
Second determining module 26, is connected with detection module 22, for being not at charged state and discharge condition in battery,
And the charge circuit in battery disconnects or in the case that discharge loop disconnects, the battery open circuit voltage according to battery and SOC
The corresponding relation of value determines state-of-charge SOC value.
By said apparatus, in the case of being in described charged state or described discharge condition in battery, by peace
When integration method determine the state-of-charge SOC value of described battery, disconnect or discharge loop in the charge circuit of described battery
In the case of disconnection, battery open circuit voltage according to described battery and the corresponding relation of described SOC value determine described charged
State SOC value, that is, this device ampere-hour integration method and open circuit voltage method are combined SOC are determined, increased
The straightener meeting of SOC, solves the problems, such as that the SOC accuracy of battery SOC evaluation method estimation is not high, improves
The estimation precision of SOC.
In embodiments of the present invention, detection module 22 is additionally operable to determine whether battery is in charged state in the following manner
Or discharge condition：Whether the electric current of detection battery is more than predetermined threshold；In the case that electric current is more than predetermined threshold, electricity
Pond is in charged state or discharge condition.It should be noted that detection module 22 passes through detection electricity in the present embodiment
Whether more than predetermined threshold, whether battery is in normal charging and discharging state to the electric current in pond really, to judge whether to adopt
Estimating SOC value, this Rule of judgment does not simultaneously differentiate between battery and is in normal charged state or normal ampere-hour integration method
Discharge condition.
In embodiments of the present invention, above-mentioned corresponding relation can be the mapping table of battery open circuit voltage and SOC value,
Can also be the curve representing battery open circuit voltage and SOC value corresponding relation, in embodiments of the present invention, when above-mentioned right
When should be related to the curve for battery open circuit voltage and SOC value corresponding relation, in the case that the charge circuit of battery disconnects,
Corresponding relation is the charging open circuit voltage curve for indicating the charging open-circuit voltage of battery and the corresponding relation of SOC value；
In the case that the discharge loop of battery disconnects, corresponding relation is for indicating the electric discharge open-circuit voltage of battery and SOC value
Corresponding relation electric discharge open circuit voltage curve.
In embodiments of the present invention, charging open circuit voltage curve obtains in the following manner：In the charging process of battery,
Every the charging open-circuit voltage values of one group of SOC value of the first scheduled time segment record and battery, wherein, two adjacent pre-
Fix time and between section, be provided with the time of repose section stopping that battery is charged；Multigroup SOC value according to record and electricity
The charging open-circuit voltage values in pond fit to charging open circuit voltage curve；Electric discharge open circuit voltage curve obtains in the following manner：
In the complete discharge process of battery, every the electric discharge open-circuit voltage of one group of SOC value of the second scheduled time segment record and battery
Value, wherein, is provided with the time of repose section stopping that battery is discharged between two adjacent predetermined amount of time；According to
The electric discharge open-circuit voltage values of multigroup SOC value of record and battery fit to electric discharge open circuit voltage curve.
In embodiments of the present invention it is considered to be the charging open-circuit voltage values of SOC value and battery after battery standing correspondence
Relation is come the charging open circuit voltage curve to obtain, and the charging open-circuit voltage values of SOC value and battery after battery standing
Corresponding relation come the electric discharge open circuit voltage curve to obtain, and because the internal-response of battery after standing tends towards stability state, because
And the curve obtaining with respect to dynamical fashion of the prior art, interference factor is less, thus the charging open-circuit voltage obtaining
Curve or electric discharge open circuit voltage curve are relatively accurate, and then improve the accuracy of SOC estimation.
In order to be closer to practical situations so that SOC estimation is more accurate, Fig. 3 is to be implemented according to the present invention
The structured flowchart two of the estimation device of the battery charge state SOC value of example, as shown in figure 3, this device removes includes Fig. 2
Outside shown all modules, also include：First correcting module 32, in such a way to charging open circuit voltage curve
Or electric discharge open circuit voltage curve is modified：According to the power consumption of battery institute access device, charging open circuit voltage curve is repaiied
Just or to electric discharge open circuit voltage curve it is modified.Consider the loss of access device in open circuit voltage method, such as electricity
The veneer of pond management system or the power consumption condition of protection circuit, the charging open-circuit voltage obtaining more conforming to actual condition is bent
Line or electric discharge open circuit voltage curve, and then improve the accuracy of SOC estimation.
In embodiments of the present invention, the second determining module 26 includes：First searching unit, returns for the charging in battery
In the case that road disconnects, search the first interval on the charging open circuit voltage curve that falls into of current voltage value of battery；
First computing unit, for the charging to two groups of SOC value corresponding to 2 points corresponding to the first interval and battery
Open-circuit voltage adopts linear difference algorithm to calculate the corresponding SOC value of current voltage value；Second determining module 26 also includes：
Second searching unit, what the current voltage value in the case of the discharge loop disconnection of battery, searching battery fell into puts
The second interval on opens voltage curve；Second computing unit, for 2 points corresponding to the second interval
It is corresponding that the electric discharge open-circuit voltage of two groups of corresponding SOC value and battery adopts linear difference algorithm to calculate current voltage value
SOC value.It should be noted that in embodiments of the present invention, above-mentioned first searching unit and above-mentioned second searching unit can
To be same searching unit or different searching units, above-mentioned first computing unit and above-mentioned second calculates single
Unit can be same computing unit or different computing units.
In the above embodiment of the present invention, can in a certain order such as time sequencing or according to magnitude of voltage from little to
Big order etc. searches current voltage drops into which area on charging open circuit voltage curve or electric discharge open circuit voltage curve
Between in, linear difference is carried out to 2 points in this interval, calculates the corresponding SOC value of this current voltage value.Need explanation
, 2 points of this interval can take two end points in this interval it is also possible to take two in interval according to certain rule
Point or two points taking this interval at random.
In embodiments of the present invention, this device also includes the second correcting module, for the battery open circuit electricity according to described battery
After the corresponding relation of pressure and described SOC value determines described state-of-charge SOC value, after the 3rd scheduled time, if
Described charge circuit is still turned off, then described SOC value is entered every the 4th scheduled time according to charging open circuit voltage curve
Row is revised；Or, after the 5th scheduled time, if described discharge loop is still turned off, according to described electric discharge open circuit
Voltage curve was modified to described SOC value every the 6th scheduled time.After determining state-of-charge SOC value, warp
After spending the 3rd scheduled time or the 5th ticket reserving time, loop is still turned off, then after every the 4th ticket reserving time or the
Six ticket reserving times carried out the revision of a SOS, by the increase of the times of revision to the SOC value determining so that estimating
SOC more accurate.
It should be noted that above-mentioned 3rd scheduled time and above-mentioned 5th scheduled time can identical it is also possible to differ；
Above-mentioned 4th scheduled time and above-mentioned 6th scheduled time can identical it is also possible to differ.
It should be noted that above-mentioned modules can be by software or hardware to realize, for the latter, Ke Yitong
Cross in the following manner to realize, but not limited to this：Above-mentioned module is respectively positioned in same processor；Or, above-mentioned module position respectively
In multiple processors.
In order to be better understood from the present invention, below in conjunction with specific embodiment, the present invention will be further explained.
Embodiments provide a kind of evaluation method of preferred battery charge state SOC value, step is as follows：
(1) when FBMS monitors battery in dynamic discharge and recharge, carry out the estimation of SOC using ampere-hour integration method；
(2) when charge circuit disconnects or discharge loop disconnects, then adopt the open circuit voltage method of the electrically independent consideration of charge and discharge.
When charge switch disconnects, ferric phosphate lithium cell is just equivalent to and is in charging open-circuit condition, is opened according to corresponding charging
Road voltage curve, the SOC that just can obtain corresponding ferric phosphate lithium cell during charging open-circuit condition through fitting process of tabling look-up is pre-
Valuation；In the same manner, when discharge switch disconnects, ferric phosphate lithium cell is just equivalent to and is in electric discharge open-circuit condition, according to corresponding
Electric discharge open circuit voltage curve, just can obtain discharge open-circuit condition when corresponding ferric phosphate lithium cell SOC discreet value.
Thus realizing the correction in open-circuit condition for the SOC, make the estimation of capacity more accurate.
The preferred embodiment of the present invention is that FBMS is mainly based on a kind of lithium iron phosphate battery management system (FBMS)
Realize the fine-grained management to ferric phosphate lithium cell, real-time monitoring is carried out to the monomer information of battery, controlled by corresponding
Prevent over-charging of battery or excessively put, reach the purpose of protection battery.Battery management system has been obtained for getting more and more now
Application, due to the power consumption condition of battery management system factor such as veneer or protection circuit etc., these are conventional open circuits
Voltage method does not consider the factor entering in using, why discharge and recharge individually considers open-circuit voltage to the preferred embodiment of the present invention,
All it is because the impact to battery open circuit voltage curve in view of electricity loss during system practical application, thus open-circuit is electric
Line of buckling is weighted processing, and obtains the charging and discharging open circuit voltage curve more conforming to actual condition, the therefore present invention
It is closer to practical situations, thus SOC estimation is more accurate, also provide for other battery management systems
The more accurate SOC modification method of one kind.
Above-mentioned FBMS needs to have following condition：(1) it is capable of the monomer information of real-time monitoring ferric phosphate lithium cell；(2)
Ferric phosphate lithium cell can be realized with charge or discharge protection；
Above-mentioned FBMS not refers in particular to the system of certain purposes it is adaptable to the administrative unit of all ferric phosphate lithium cells.FBMS
Ferric phosphate lithium cell can be realized with charge or discharge protection, when charge protection, charge switch cuts off, charge circuit
It is off, battery stops charging；When discharge prevention, discharge switch cuts off, and discharge loop is off,
Battery stops electric discharge, thus playing the effect of protection battery.And when charge circuit disconnects or discharge switch cuts off, battery
It is in open-circuit condition, no current passes through, and now battery is equivalent to open-circuit condition, and therefore FBMS possesses the standing of set of cells
Condition, thus electric to LiFePO4 for the open circuit voltage method of the electrically independent consideration of employing charge and discharge described in the preferred embodiment of the present invention
The modification method of pond SOC lays the foundation.
Embodiments provide the evaluation method of another kind of preferably battery charge state SOC value, concrete steps are such as
Under：
(1) by complete charging and discharging process is carried out to ferric phosphate lithium cell, and during carry out segmentation standing
Record, then obtains corresponding charge open circuit curve and electric discharge open circuit curve by weighted fitting, and this two curves contain
Ferric phosphate lithium cell SOC and the corresponding relation of battery open circuit voltage, then this relation table are stored in FBMS；
(2) initialize SOC.Magnitude of voltage according to battery carries out the estimation of initial capacity, according to battery voltage value, leads to
Cross linear interpolation algorithm of tabling look-up and obtain corresponding ferric phosphate lithium cell SOC initial value SOCini.
(3) if judging, battery current absolute value exceeds Imin(minima of electric current is determined according to hardware detection error),
Now think that battery, in normal charge or discharge, to be estimated using ampere-hour integration methodNo
Then enter next step；
(4) judging whether the charge circuit of FBMS disconnects, if disconnecting, entering step (5), otherwise enter step (6)；
(5) start timer, when timing time reaches one hour, then according to charging open circuit voltage curve OCV-SOCchg
Carry out the correction of SOC, mainly according to the battery voltage value after standing, using incrementally searching method, find and work as
Front magnitude of voltage falls into OCV-SOCchgWhich interval in, then linear fit is carried out to 2 points of this interval, calculates
The corresponding SOC value of current voltage value.If charge circuit state becomes closure, timer resets, and exits and this time revises
Process；
(6) judging whether discharge loop disconnects, if disconnecting, starting timer, when timing time reaches one hour, then
According to electric discharge open circuit voltage curve OCV-SOCdischgCarry out the correction of SOC, mainly according to the set of cells electricity after standing
Pressure value, using incrementally searching method, finds current voltage value and falls into OCV-SOCdischgWhich interval in, then
Linear fit is carried out to 2 points of this interval, calculates the corresponding SOC value of current voltage value.If discharge loop state becomes
Become closure, then timer resets, and exits this makeover process；
(7) above-mentioned (5) and (6), if step was still turned off in loop after one hour, carried out one every 15 minutes afterwards
The correction of secondary SOC, makes times of revision increase, so that volume calculation is more accurate.
(5), (6) in above-mentioned steps, (7) are to carry out SOC by charge and discharge electrically independent OCV-SOC curve
Revise, step (3) embodies the estimation carrying out SOC during normal discharge and recharge using ampere-hour integration method, both combination,
The OCV-SOC curve amendment method of the especially electrically independent consideration of charge and discharge makes the estimation of capacity more accurate.It is described in detail below
How to obtain charging OCV-SOC curve and electric discharge OCV-SOC curve：
(1) battery is charged to ceiling voltage, electric current to be charged close to 0 when, and maintain a period of time it is believed that battery
It is full of, now stand a hour, record corresponding battery voltage value and SOC value.Then battery-end accesses load,
Make battery smaller current be discharged to a new SOC value, stand a hour, record corresponding battery voltage value, according to
This analogizes, until battery is discharged, records final SOC value and standing magnitude of voltage.Record in the process is all
(SOC, Uocv) point fit to electric discharge open circuit curve OCV-SOCdischg 1, as shown in fig. 4 a, the abscissa of this curve
For SOC value, vertical coordinate is battery open circuit voltage value Uocv；
(2) on the basis of step (1), battery is carried out smaller current charging, the interval of sample record is to discharge out
SOC value in the curve of road is defined, and is charged respectively standing a hour, records corresponding battery voltage value, until
Battery is fully charged.All (the U recording in the processocv, SOC) point fit to charging open circuit curve OCV-SOCchg 1,
As shown in Figure 4 b；
(3) above procedure is all only tested it is considered to after FBMS system access in itself to battery, veneer or protection
The power consumption condition of circuit etc., to OCV-SOC obtained abovedischg 1And OCV-SOCchg 1Two groups of data are weighted intending
Close, because veneer or protection circuit have certain kwh loss, therefore OCV-SOCdischg 1And OCV-SOCchg 1
Two groups of curves are offset downward, and will be worth to OCV-SOC by magnitude of voltage offset voltagedischgAnd OCV-SOCchg
Curve.
(4) to the OCV-SOC after revisingdischgAnd OCV-SOCchgCurve carries out the checking of practical application, skew
Magnitude of voltage determines according to the veneer of each system or the loss situation of protection circuit, by the checking of practical application, takes
Obtain rational offset voltage value, thus obtaining final OCV-SOCdischgCurve, as shown in Figure 5 a and OCV-SOCchg
Curve, as shown in Figure 5 b it is ensured that SOC correction is more accurate.
The open circuit voltage method of electrically independent for charge and discharge consideration and ampere-hour integration method are combined and carry out phosphoric acid by the preferred embodiments of the present invention
The estimation of lithium iron battery SOC, in particular by the electrically independent consideration of charge and discharge open circuit voltage method to ferric phosphate lithium cell SOC
It is modified, considerably increase the straightener meeting of SOC, improve the estimation precision of SOC, it is easy to accomplish and promote.
Because the present invention proposes the open circuit voltage method of the electrically independent consideration of charge and discharge, in the case of charge protection or discharge prevention,
All SOC can be modified, improve the SOC estimation precision under this operating mode.
Embodiments provide the evaluation method of another preferred battery charge state SOC value, concrete steps are such as
Under：
Lithium iron phosphate battery management system FBMS can gather the analog quantitys such as battery cell voltage, temperature and battery current
With the collection of quantity of state, ferric phosphate lithium cell can be realized with charge or discharge protection, when charge protection, charging is opened
Close cut-out, charge circuit is off, battery stops charging；When discharge prevention, discharge switch cuts off, electric discharge
Loop is off, and battery stops electric discharge.
In conjunction with the charging open circuit curve OCV-SOC shown in Fig. 5 a in above-described embodimentchgWith the electric discharge open circuit shown in Fig. 5 b
Voltage curve OCV-SOCdischgThe preferred embodiment of the present invention is further explained, this two groups of curve negotiating collection points
(Uocv, SOC) coordinated manner be mapped to (each curve comprises 13 coordinate points) mode of two-dimensional array and write
To be used in FBMS.
Fig. 6 is that FBMS according to the preferred embodiment of the invention estimates flow chart to the SOC of ferric phosphate lithium cell, in conjunction with
This flow chart illustrates that the specific implementation step of SOC estimation is as follows：
Step S602, the initial value of estimation SOC.After FBMS starts work, the real time data according to collecting obtains
Battery voltage value Uini, then pass through to table look-up, check UiniIf voltage is less than the open circuit curve OCV-SOC that chargeschgIn
The voltage of certain point i is then it is assumed that this electrical voltage point falls into (Ui,SOCi) and (Ui-1,SOCi-1) interval interior, then basis
Linear interpolation algorithm obtains corresponding ferric phosphate lithium cell SOC initial value SOCini：
Step S604, if periodically judging, battery current absolute value exceeds Imin(2A), now think electric current normal
Charge or discharge, to be estimated using ampere-hour integration methodOtherwise enter next step；
Step S606, judges whether the charge circuit of FBMS disconnects, if disconnecting, entering step S608, otherwise entering
Step S610；
Step S608, starts timer (i.e. wBatCutTime1), when timing time reaches one hour, then according to charging
Open circuit voltage curve OCV-SOCchgCarry out the correction of SOC, mainly according to the battery voltage value after standing, adopt
Incrementally search method, find current voltage value and fall into OCV-SOCchgWhich interval in, then two to this interval
Point carries out linear interpolation, calculates the corresponding SOC value of current voltage value.Computational methods are with reference in step step S602
Formula (a).If charge circuit state becomes closure, timer resets, and exits this makeover process；
Step S610, judges whether discharge loop disconnects, if disconnecting, starts timer, to reach one little when timing time
When, then according to electric discharge open circuit voltage curve OCV-SOCdischgCarry out the correction of SOC, mainly according to the electricity after standing
Pond group magnitude of voltage, using incrementally searching method, finds current voltage value and falls into OCV-SOCdischgWhich interval in,
Then linear interpolation is carried out to 2 points of this interval, calculate the corresponding SOC value of current voltage value.Computational methods reference
Formula (a) in step S602.If discharge loop state becomes closure, timer resets, and exits this makeover process；
If above-mentioned steps S608 and step S610 were still turned off in loop after one hour, carried out one every 15 minutes afterwards
The correction of secondary SOC, makes times of revision increase, so that volume calculation is more accurate.
Loop cycle execution step S602～step S612.
Embodiments of the invention additionally provide a kind of storage medium.Alternatively, in the present embodiment, above-mentioned storage medium can
To be arranged to store the program code for executing following steps：
S1, whether detection battery is in charged state or discharge condition；
S2, in the case that battery is in charged state or discharge condition, determines the charged of battery by ampere-hour integration method
State SOC value；
S3, is not at charged state and discharge condition in battery, and the charge circuit in battery disconnects or discharge loop breaks
In the case of opening, the battery open circuit voltage according to battery and the corresponding relation of SOC value determine state-of-charge SOC value.
Alternatively, in the present embodiment, above-mentioned storage medium can include but is not limited to：USB flash disk, read only memory (ROM,
Read-Only Memory), random access memory (RAM, Random Access Memory), portable hard drive,
Magnetic disc or CD etc. are various can be with the medium of store program codes.
Alternatively, the specific example in the present embodiment may be referred to showing described in above-described embodiment and optional embodiment
Example, the present embodiment will not be described here.
Obviously, those skilled in the art should be understood that each module of the above-mentioned present invention or each step can be with general
Realizing, they can concentrate on single computing device computing device, or be distributed in multiple computing devices and formed
Network on, alternatively, they can be realized with the executable program code of computing device, it is thus possible to by they
Storage to be executed by computing device in the storage device, and in some cases, can be to hold different from order herein
The shown or described step of row, or they are fabricated to respectively each integrated circuit modules, or will be many in them
Individual module or step are fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardware
Combine with software.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the technology of this area
For personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any
Modification, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (14)
1. a kind of evaluation method of battery charge state SOC value is it is characterised in that include：
Whether detection battery is in charged state or discharge condition；
In the case that described battery is in described charged state or described discharge condition, true by ampere-hour integration method
The state-of-charge SOC value of fixed described battery；
It is not at described charged state and described discharge condition in described battery, and the charge circuit in described battery breaks
Open or in the case that discharge loop disconnects, the battery open circuit voltage according to described battery and the correspondence of described SOC value
Relation determines described state-of-charge SOC value.
2. method according to claim 1 is it is characterised in that determine whether battery is in charging shape in the following manner
State or discharge condition：
Detect whether the electric current of described battery is more than predetermined threshold；
In the case that described electric current is more than described predetermined threshold, described battery is in described charged state or described
Discharge condition.
3. method according to claim 1 it is characterised in that described battery charge circuit disconnect in the case of,
Described corresponding relation is for indicating filling of the charging open-circuit voltage of described battery and the corresponding relation of described SOC value
Opens voltage curve；In the case that the discharge loop of described battery disconnects, described corresponding relation is for indicating
The electric discharge open circuit voltage curve of the corresponding relation of the electric discharge open-circuit voltage of described battery and described SOC value.
4. method according to claim 3 is it is characterised in that described charging open circuit voltage curve obtains in the following manner
Take：In the charging process of described battery, every SOC value and described electricity described in one group of the first scheduled time segment record
The charging open-circuit voltage values in pond, wherein, are provided with stopping to described electricity between two adjacent described predetermined amount of time
The time of repose section that pond is charged；Multigroup described SOC value according to record and the charging open-circuit voltage of described battery
Value fits to described charging open circuit voltage curve；
Described electric discharge open circuit voltage curve obtains in the following manner：In the complete discharge process of described battery, every
The electric discharge open-circuit voltage values of SOC value and described battery described in second one group of scheduled time segment record, wherein, two phases
It is provided with the time of repose section stopping that described battery is discharged between adjacent described predetermined amount of time；According to record
Multigroup described SOC value and the electric discharge open-circuit voltage values of described battery fit to described electric discharge open circuit voltage curve.
5. method according to claim 3 is it is characterised in that methods described also includes：In such a way to described
Charging open circuit voltage curve or electric discharge open circuit voltage curve are modified：
According to the power consumption of described battery institute access device, described charging open circuit voltage curve is modified or to institute
State electric discharge open circuit voltage curve to be modified.
6. method according to any one of claim 1 to 5 it is characterised in that
In the case that the charge circuit of described battery disconnects, battery open circuit voltage according to described battery and described
The corresponding relation of SOC value determines that described state-of-charge SOC value includes：The current voltage value searching described battery falls into
Described charging open circuit voltage curve on the first interval；To 2 points of institutes corresponding to described first interval
The charging open-circuit voltage of SOC value and described battery described in corresponding two groups adopts linear difference algorithm to calculate described working as
The corresponding SOC value of front magnitude of voltage；
In the case that the discharge loop of described battery disconnects, battery open circuit voltage according to described battery and described
The corresponding relation of SOC value determines that described state-of-charge SOC value includes：The current voltage value searching described battery falls into
Described electric discharge open circuit voltage curve on the second interval；To 2 points of institutes corresponding to described second interval
The electric discharge open-circuit voltage of SOC value and described battery described in corresponding two groups adopts linear difference algorithm to calculate described working as
The corresponding SOC value of front magnitude of voltage.
7. method according to any one of claim 1 to 6 it is characterised in that
The corresponding relation of the battery open circuit voltage according to described battery and described SOC value determines described state-of-charge
After SOC value, methods described also includes：After the 3rd scheduled time, if described charge circuit is still turned off,
Then described SOC value is modified every the 4th scheduled time according to charging open circuit voltage curve；Or, the 5th
After the scheduled time, if described discharge loop is still turned off, according to described electric discharge open circuit voltage curve every the 6th
The scheduled time is modified to described SOC value.
8. a kind of estimation device of battery charge state SOC value is it is characterised in that include：
Detection module, for detecting whether battery is in charged state or discharge condition；
First determining module, in the case of being in described charged state or described discharge condition in described battery,
Determine the state-of-charge SOC value of described battery by ampere-hour integration method；
Second determining module, for being not at described charged state and described discharge condition in described battery, and in institute
In the case of stating charge circuit disconnection or the discharge loop disconnection of battery, according to the battery open circuit voltage of described battery
Determine described state-of-charge SOC value with the corresponding relation of described SOC value.
9. device according to claim 8 is it is characterised in that detection module is additionally operable to determine in the following manner battery
Whether it is in charged state or discharge condition：
Detect whether the electric current of described battery is more than predetermined threshold；
In the case that described electric current is more than described predetermined threshold, described battery is in described charged state or described
Discharge condition.
10. device according to claim 8 it is characterised in that described battery charge circuit disconnect in the case of,
Described corresponding relation is for indicating filling of the charging open-circuit voltage of described battery and the corresponding relation of described SOC value
Opens voltage curve；In the case that the discharge loop of described battery disconnects, described corresponding relation is for indicating
The electric discharge open circuit voltage curve of the corresponding relation of the electric discharge open-circuit voltage of described battery and described SOC value.
11. devices according to claim 10 it is characterised in that described charging open circuit voltage curve in the following manner
Obtain：In the charging process of described battery, every SOC value described in one group of the first scheduled time segment record and described
The charging open-circuit voltage values of battery, wherein, are provided with stopping to described between two adjacent described predetermined amount of time
The time of repose section that battery is charged；The charging open circuit electricity of the multigroup described SOC value according to record and described battery
Pressure value fits to described charging open circuit voltage curve；
Described electric discharge open circuit voltage curve obtains in the following manner：In the complete discharge process of described battery, every
The electric discharge open-circuit voltage values of SOC value and described battery described in second one group of scheduled time segment record, wherein, two phases
It is provided with the time of repose section stopping that described battery is discharged between adjacent described predetermined amount of time；According to record
Multigroup described SOC value and the electric discharge open-circuit voltage values of described battery fit to described electric discharge open circuit voltage curve.
12. devices according to claim 10 are it is characterised in that described device also includes：Correcting module, for pressing
According in the following manner, described charging open circuit voltage curve or electric discharge open circuit voltage curve are modified：
According to the power consumption of described battery institute access device, described charging open circuit voltage curve is modified or to institute
State electric discharge open circuit voltage curve to be modified.
13. devices any one of according to Claim 8 to 12 it is characterised in that
Described second determining module includes：First searching unit, the feelings disconnecting for the charge circuit in described battery
Under condition, search the first interval on the described charging open circuit voltage curve that falls into of current voltage value of described battery；
First computing unit, for the SOC value described in two groups corresponding to 2 points corresponding to described first interval and
The charging open-circuit voltage of described battery adopts linear difference algorithm to calculate the corresponding SOC value of described current voltage value；
Described second determining module also includes：Second searching unit, disconnects for the discharge loop in described battery
In the case of, search the second value area on the described electric discharge open circuit voltage curve that falls into of current voltage value of described battery
Between；Second computing unit, for the SOC described in two groups corresponding to 2 points corresponding to described second interval
The electric discharge open-circuit voltage of value and described battery adopts linear difference algorithm to calculate the corresponding SOC of described current voltage value
Value.
14. devices any one of according to Claim 8 to 13 are it is characterised in that described device also includes revising mould
Block, the corresponding relation for the battery open circuit voltage according to described battery and described SOC value determines described state-of-charge
After SOC value, after the 3rd scheduled time, if described charge circuit is still turned off, according to the open circuit electricity that charges
Line of buckling was modified to described SOC value every the 4th scheduled time；Or, after the 5th scheduled time, if
Described discharge loop is still turned off, then according to described electric discharge open circuit voltage curve every the 6th scheduled time to described
SOC value is modified.
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| CN201510446190.4A CN106405421A (en) | 2015-07-27 | 2015-07-27 | Battery state-of-charge (SOC) value evaluation method and device |
| PCT/CN2016/089688 WO2017016385A1 (en) | 2015-07-27 | 2016-07-11 | Estimation method and apparatus for state-of-charge value of battery |
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| CN116108705B (en) * | 2023-04-13 | 2023-07-04 | 烟台海博电气设备有限公司 | Sodium ion battery management system and SOC calculation method |
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| CN117060553B (en) * | 2023-10-13 | 2024-01-02 | 快电动力(北京)新能源科技有限公司 | Battery management method, device, system and component of energy storage system |
| CN118294820B (en) * | 2024-06-06 | 2024-09-10 | 比亚迪股份有限公司 | Battery state of charge (SOC) estimation method, device, medium, product and equipment |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6388447B1 (en) * | 2000-11-07 | 2002-05-14 | Moltech Power Systems, Inc. | Method and apparatus for battery fuel gauging |
| JP2007292648A (en) * | 2006-04-26 | 2007-11-08 | Toyota Motor Corp | Device for estimating charged state of secondary battery |
| CN101303397A (en) * | 2008-06-25 | 2008-11-12 | 河北工业大学 | Method and apparatus for computing lithium ion batteries residual electric energy |
| JP2008541012A (en) * | 2005-05-11 | 2008-11-20 | エルジー・ケム・リミテッド | Method for estimating the state of charge of a hybrid vehicle battery |
| CN102162836A (en) * | 2011-03-21 | 2011-08-24 | 浙江吉利汽车研究院有限公司 | Estimation method of vehicle battery stress optical coefficient (SOC) |
| CN102347517A (en) * | 2011-06-29 | 2012-02-08 | 重庆长安汽车股份有限公司 | Adaptive SOC (state of charge) estimation method and system of service life state |
| CN102608444A (en) * | 2011-12-26 | 2012-07-25 | 惠州市亿能电子有限公司 | SOC (State of Charge) detecting and correcting method for super capacitance energy-storing device |
| CN103018679A (en) * | 2012-12-10 | 2013-04-03 | 中国科学院广州能源研究所 | Estimation method of initial state of charge (SOC0) of lead-acid cell |
| CN103048626A (en) * | 2012-12-17 | 2013-04-17 | 惠州市亿能电子有限公司 | Method for accurately estimating SOC (State of Charge) |
| CN103499794A (en) * | 2013-10-14 | 2014-01-08 | 北京华电天仁电力控制技术有限公司 | Method and device for evaluating state of charge (SOC) of energy storage battery |
| CN103935260A (en) * | 2014-05-08 | 2014-07-23 | 山东大学 | Battery managing method based on battery safety protection |
| CN104283230A (en) * | 2014-10-22 | 2015-01-14 | 国家电网公司 | Storage battery SOC calculating method based on multi-energy micro-grid |
| CN104714182A (en) * | 2013-12-11 | 2015-06-17 | 广州汽车集团股份有限公司 | Method and system for determining state-of-charge value of battery |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1181593C (en) * | 2002-04-04 | 2004-12-22 | 北京航空航天大学 | Method and device for automatic equilization of charge-and-dischage based on cell dynamic electricity different compensation |
| JP4103713B2 (en) * | 2003-07-18 | 2008-06-18 | 株式会社デンソー | Current detector |
| US20140306712A1 (en) * | 2013-04-12 | 2014-10-16 | Broadcom Corporation | Tracking aging effect on battery impedance and tracking battery state of health |
-
2015
- 2015-07-27 CN CN201510446190.4A patent/CN106405421A/en active Pending
-
2016
- 2016-07-11 WO PCT/CN2016/089688 patent/WO2017016385A1/en active Application Filing
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6388447B1 (en) * | 2000-11-07 | 2002-05-14 | Moltech Power Systems, Inc. | Method and apparatus for battery fuel gauging |
| JP2008541012A (en) * | 2005-05-11 | 2008-11-20 | エルジー・ケム・リミテッド | Method for estimating the state of charge of a hybrid vehicle battery |
| JP2007292648A (en) * | 2006-04-26 | 2007-11-08 | Toyota Motor Corp | Device for estimating charged state of secondary battery |
| CN101303397A (en) * | 2008-06-25 | 2008-11-12 | 河北工业大学 | Method and apparatus for computing lithium ion batteries residual electric energy |
| CN102162836A (en) * | 2011-03-21 | 2011-08-24 | 浙江吉利汽车研究院有限公司 | Estimation method of vehicle battery stress optical coefficient (SOC) |
| CN102347517A (en) * | 2011-06-29 | 2012-02-08 | 重庆长安汽车股份有限公司 | Adaptive SOC (state of charge) estimation method and system of service life state |
| CN102608444A (en) * | 2011-12-26 | 2012-07-25 | 惠州市亿能电子有限公司 | SOC (State of Charge) detecting and correcting method for super capacitance energy-storing device |
| CN103018679A (en) * | 2012-12-10 | 2013-04-03 | 中国科学院广州能源研究所 | Estimation method of initial state of charge (SOC0) of lead-acid cell |
| CN103048626A (en) * | 2012-12-17 | 2013-04-17 | 惠州市亿能电子有限公司 | Method for accurately estimating SOC (State of Charge) |
| CN103499794A (en) * | 2013-10-14 | 2014-01-08 | 北京华电天仁电力控制技术有限公司 | Method and device for evaluating state of charge (SOC) of energy storage battery |
| CN104714182A (en) * | 2013-12-11 | 2015-06-17 | 广州汽车集团股份有限公司 | Method and system for determining state-of-charge value of battery |
| CN103935260A (en) * | 2014-05-08 | 2014-07-23 | 山东大学 | Battery managing method based on battery safety protection |
| CN104283230A (en) * | 2014-10-22 | 2015-01-14 | 国家电网公司 | Storage battery SOC calculating method based on multi-energy micro-grid |
Cited By (37)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572323A (en) * | 2017-03-10 | 2018-09-25 | 丰田自动车株式会社 | Battery status estimating unit |
| CN108572323B (en) * | 2017-03-10 | 2020-11-20 | 丰田自动车株式会社 | Battery state estimation device |
| CN107247234A (en) * | 2017-05-10 | 2017-10-13 | 江苏大学 | The SOC real-time onlines method of estimation and system of a kind of Vehicular dynamic battery |
| CN107247234B (en) * | 2017-05-10 | 2019-12-31 | 江苏大学 | SOC real-time online estimation method and system for vehicle power battery |
| CN107015163A (en) * | 2017-06-12 | 2017-08-04 | 惠州亿纬锂能股份有限公司 | The acquisition methods and device of a kind of battery capacity |
| CN107015163B (en) * | 2017-06-12 | 2021-01-05 | 惠州亿纬锂能股份有限公司 | Battery capacity obtaining method and device |
| CN109471034A (en) * | 2017-09-08 | 2019-03-15 | 上海汽车集团股份有限公司 | A kind of acquisition methods and device of electric automobile energy efficiency |
| CN109471034B (en) * | 2017-09-08 | 2020-11-03 | 上海汽车集团股份有限公司 | Method and device for acquiring energy efficiency of electric automobile |
| WO2019052015A1 (en) * | 2017-09-14 | 2019-03-21 | 广州市香港科大霍英东研究院 | Method for estimating state of charge of battery |
| US11067634B2 (en) * | 2017-09-14 | 2021-07-20 | The Hkust Fok Ying Tung Research Institute | Method and apparatus for estimating state of charge of battery, and computer readable storage medium |
| CN112513656A (en) * | 2018-06-07 | 2021-03-16 | 劳斯莱斯德国有限两合公司 | Method and apparatus for estimating state of charge of battery |
| CN109239608B (en) * | 2018-08-10 | 2021-01-19 | 力高(山东)新能源技术有限公司 | Method for correcting SOC-OCV curve of lithium battery in real time |
| CN109239608A (en) * | 2018-08-10 | 2019-01-18 | 安徽力高新能源技术有限公司 | A kind of method of real-time amendment lithium battery SOC-OCV curve |
| CN109188291A (en) * | 2018-09-17 | 2019-01-11 | 济南大学 | A kind of lead-acid accumulator core discharge capacitor residual capacity prediction technique |
| CN108931741A (en) * | 2018-09-18 | 2018-12-04 | 深圳市格瑞普智能电子有限公司 | Battery pack remaining capacity monitoring method and system |
| CN109655755A (en) * | 2018-12-21 | 2019-04-19 | 深圳先进储能材料国家工程研究中心有限公司 | A kind of battery SOC estimation calibration method |
| CN109655755B (en) * | 2018-12-21 | 2020-11-03 | 深圳先进储能材料国家工程研究中心有限公司 | Battery SOC estimation and calibration method |
| CN109633471A (en) * | 2018-12-24 | 2019-04-16 | 银隆新能源股份有限公司 | Method for determining the state-of-charge and open terminal voltage corresponding relationship of battery |
| CN109884545A (en) * | 2019-03-27 | 2019-06-14 | 奇瑞商用车（安徽）有限公司 | A kind of SOC estimation method based on dynamic electric voltage calibration |
| CN110967647A (en) * | 2019-06-24 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Charge state correction method and device |
| US10989759B1 (en) | 2019-06-24 | 2021-04-27 | Contemporary Amperex Technology Co., Limited | Method and apparatus for correcting state of charge |
| US11536772B2 (en) | 2019-06-24 | 2022-12-27 | Contemporary Amperex Technology Co., Limited | Method and apparatus for correcting state of charge |
| CN110361658A (en) * | 2019-08-12 | 2019-10-22 | 广东博力威科技股份有限公司 | SOC estimation method based on OCV |
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