CN108152753A - A kind of method that accumulator internal resistance is detected by inductance capacitance discharged in series - Google Patents
A kind of method that accumulator internal resistance is detected by inductance capacitance discharged in series Download PDFInfo
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- CN108152753A CN108152753A CN201711492856.5A CN201711492856A CN108152753A CN 108152753 A CN108152753 A CN 108152753A CN 201711492856 A CN201711492856 A CN 201711492856A CN 108152753 A CN108152753 A CN 108152753A
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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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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Abstract
The present invention provides a kind of method that accumulator internal resistance is detected by inductance capacitance discharged in series, includes the following steps：(1) control of discharge：Being connected in parallel on the both ends of accumulator after inductance L, capacitance C and switch S series connection, during measurement, switch S is closed, circuit is in second-order circuit zero state response state, and accumulator is discharged by S by the resistance R, inductance L and capacitance C；(2) acquisition of voltage and current signal：The continuous instantaneous value for measuring discharge current i (t) and battery tension u (t), obtain a series of [i (1), u (1)], [i (2), u (2)], ..., [i (n), u (n)] data；(3) processing of data；The present invention is avoided and is switched short circuit risk caused by when the out of control or appearance that is interfered can not disconnect due to capacitance of having connected in discharge loop, safe；The principle of the invention and processing method are simple simultaneously, it is easy to accomplish.
Description
Technical field
The present invention relates to accumulator internal resistance detection technique fields more particularly to one kind to be detected by inductance capacitance discharged in series
The method of accumulator internal resistance.
Background technology
Accumulator extensive use in industry, traffic, communications industry, as the main power source or stand-by power supply of equipment,
It is most important to the reliably and securely operation for being powered equipment.Therefore, staff is extremely to be concerned about to the performance of accumulator
's.Judge accumulator property with internal resistance detection method, realize the on-line maintenance of accumulator, be one of preferred plan generally acknowledged at present.
Staff can be made early to carry out the maintenance of accumulator by internal resistance on-line checking, more changed jobs, guarantee is powered equipment
Reliably and securely run.Therefore the detection to accumulator internal resistance, is particularly monitored on-line, has important practical significance.
The internal resistance of accumulator can reflect the capacity and performance condition of battery indirectly.The capacity of battery is bigger, and internal resistance is just
It is smaller, therefore can realize and online evaluation is carried out to the capacity of battery by the measurement to accumulator internal resistance.Accumulator property becomes
Its internal resistance can also increase when poor.But due to the internal resistance very little of accumulator, internal resistance is about that several milliohms or even zero are several during full capacity
A milliohm, therefore internal resistance method has larger technical difficulty when realizing.
Detection to accumulator internal resistance is a more complicated process, and common methods mainly have at present：Densimetry, open circuit
Voltage method, direct-current discharge method and AC signal injection method.
Densimetry estimates the internal resistance of accumulator by measuring the density of battery liquid, is usually used in open type plumbic acid electricity
The internal resistance measurement in pond is not suitable for the internal resistance detection of common colloid storage battery and sealed lead acid storage battery.Open circuit voltage method passes through
The terminal voltage of accumulator is measured to estimate accumulator internal resistance, precision is very poor or even derives a wrong conclusion.
Direct-current discharge method and AC signal injection method are methods more typical at present.
Direct-current discharge method is the method proposed in IEC896.2-1995 standards, by carrying out 2 sizes not to accumulator
Same heavy-current discharge measures the voltage drop on accumulator, the internal resistance of cell is calculated by Ohm's law.Direct-current discharge method is necessary
Measurement could be realized in the state of static or off line, can not really realize the on-line measurement of accumulator；The electric discharge pair of high current
There is damage in accumulator, frequently measured if it is monitoring accumulator, the damage to accumulator will accumulate, instead shadow
Ring capacity and the service life of accumulator；The measurement reproducibility of direct current method is always to perplex the bottleneck of direct current method development, general measure
Period is one month or more, even up to 1 year.
AC signal injection method measures accumulator both ends by applying an alternating low frequency low current signal to accumulator
Low-frequency voltage and the low-frequency current and the phase difference of the two flowed through, so as to calculate the internal resistance of accumulator.Due to straight-flow system
The presence of busbar and feed cable distribution capacity, and distribution capacity with straight-flow system capacity, the live feature of power supply it is different without
Together, distribution capacity has played shunting function to the low-frequency current signal of application, substantially reduces the monitoring resolution ratio of the internal resistance of cell, and
And the low-frequency current signal applied is also an interference source for straight-flow system.
Such as the Chinese invention patent of Publication No. CN1727909, which provides one kind and detects electric power storage by inductive discharge
The method of pond internal resistance, this method can online or offline be monitored accumulator internal resistance, but need to discharge switch
Appropriate control is carried out, once the phenomenon that out of control or appearance that is interfered can not disconnect is switched, it will be to entire battery system
Cause safety problem.
Invention content
The present invention is exactly to be directed to more than technical problem, is provided a kind of by inductance capacitance discharged in series detection accumulator internal resistance
Method.
The present invention to achieve the above object, using following technical scheme：One kind is detected by inductance capacitance discharged in series to be stored
The method of the internal resistance of cell, includes the following steps：
(1) control of discharge：Being connected in parallel on the both ends of accumulator after inductance L, capacitance C and switch S series connection, during measurement, will open
S is closed to be closed, circuit is in second-order circuit zero state response state, accumulator by S by the resistance R, inductance L and capacitance C into
Row electric discharge, the discharge current changed, the discharge current of variation cause the variation of accumulator voltage；
(2) acquisition of voltage and current signal：Gradually increase with the growth discharge current of time in step (1), meanwhile, no
Disconnected measurement discharge current i (t) and the instantaneous value of battery tension u (t), obtain a series of [i (1), u (1)], [i (2), u
(2)] ... ..., [i (n), u (n)] data；
(3) processing of data：Terminal voltage and discharge current the two electric signals progress high-speed sampling measurement to accumulator,
According to a series of [i (1), the u (1)] measured, [i (2), u (2)] ... ..., [i (n), u (n)] data, using curve matching
Method, calculate the internal resistance of accumulator；When wherein sampling, in 5-10 sampled point, data are handled using the method for average, in 11-
During 50 sampled points, using Least Square in Processing data, when more than 50 sampled points, using the method for maximal possibility estimation
Handle data.
The voltage, electric current measurement using be isolated by the way of, discharge current is measured using Hall current sensor,
Anti-aliasing low-pass filtering treatment should be carried out before voltage and current sampling.
The terminal voltage of the accumulator and the relationship of total discharge current are：U=E-i ﹒ r, E are the electromotive force of accumulator.
The beneficial effects of the invention are as follows：The present invention due to capacitance of having connected in discharge loop, avoid switch it is out of control or
Short circuit risk caused by when can not disconnect that person is interfered appearance, it is safe；The principle of the invention and processing method are simple simultaneously,
It is easily achieved.
Specific embodiment
With reference to embodiment, the invention will be further described：
A kind of method that accumulator internal resistance is detected by inductance capacitance discharged in series, includes the following steps：
(1) control of discharge：Being connected in parallel on the both ends of accumulator after inductance L, capacitance C and switch S series connection, during measurement, will open
S is closed to be closed, circuit is in second-order circuit zero state response state, accumulator by S by the resistance R, inductance L and capacitance C into
Row electric discharge, the discharge current changed, the discharge current of variation cause the variation of accumulator voltage；
(2) acquisition of voltage and current signal：Gradually increase with the growth discharge current of time in step (1), meanwhile, no
Disconnected measurement discharge current i (t) and the instantaneous value of battery tension u (t), obtain a series of [i (1), u (1)], [i (2), u
(2)] ... ..., [i (n), u (n)] data；
(3) processing of data：Terminal voltage and discharge current the two electric signals progress high-speed sampling measurement to accumulator,
According to a series of [i (1), the u (1)] measured, [i (2), u (2)] ... ..., [i (n), u (n)] data, using curve matching
Method, calculate the internal resistance of accumulator；When wherein sampling, in 5-10 sampled point, data are handled using the method for average, in 11-
During 50 sampled points, using Least Square in Processing data, when more than 50 sampled points, using the method for maximal possibility estimation
Handle data.
The voltage, electric current measurement using be isolated by the way of, discharge current is measured using Hall current sensor,
Anti-aliasing low-pass filtering treatment should be carried out before voltage and current sampling.
The terminal voltage of the accumulator and the relationship of total discharge current are：U=E-i ﹒ r, E are the electromotive force of accumulator.
Above example is to the present invention have been described in detail, it is clear that present invention specific implementation is not limited by aforesaid way
System, as long as employing the various improvement of inventive concept and technical scheme of the present invention progress or not improved directly applying to it
Its occasion, within protection scope of the present invention.
Claims (3)
- A kind of 1. method that accumulator internal resistance is detected by inductance capacitance discharged in series, which is characterized in that include the following steps：(1) control of discharge：Being connected in parallel on the both ends of accumulator after inductance L, capacitance C and switch S series connection, during measurement, switch S is closed It closes, circuit is in second-order circuit zero state response state, and accumulator is put by S by the resistance R, inductance L and capacitance C Electricity, the discharge current changed, the discharge current of variation cause the variation of accumulator voltage；(2) acquisition of voltage and current signal：Gradually increase with the growth discharge current of time in step (1), meanwhile, constantly The instantaneous value of discharge current i (t) and battery tension u (t) are measured, obtains a series of [i (1), u (1)], [i (2), u (2)] ... ..., [i (n), u (n)] data；(3) processing of data：Terminal voltage and discharge current the two electric signals progress high-speed sampling measurement to accumulator, according to A series of [i (1), the u (1)] measured, [i (2), u (2)] ... ..., [i (n), u (n)] data, using the side of curve matching Method calculates the internal resistance of accumulator；When wherein sampling, in 5-10 sampled point, data are handled using the method for average, at 11-50 During sampled point, using Least Square in Processing data, when more than 50 sampled points, handled using the method for maximal possibility estimation Data.
- 2. a kind of method that accumulator internal resistance is detected by inductance capacitance discharged in series according to claim 1, feature It is, by the way of the measurement of the voltage, electric current is using isolation, discharge current is measured using Hall current sensor, electric Anti-aliasing low-pass filtering treatment should be carried out before current voltage sampling.
- 3. a kind of method that accumulator internal resistance is detected by inductance capacitance discharged in series according to claim 1, feature It is, the terminal voltage of the accumulator and the relationship of total discharge current are：U=E-i ﹒ r, E are the electromotive force of accumulator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711492856.5A CN108152753A (en) | 2017-12-30 | 2017-12-30 | A kind of method that accumulator internal resistance is detected by inductance capacitance discharged in series |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113281668A (en) * | 2021-05-26 | 2021-08-20 | 华中科技大学 | Energy storage battery impedance identification method and system based on driving inverter and application |
| CN117031313A (en) * | 2023-07-24 | 2023-11-10 | 广东电网有限责任公司茂名供电局 | Lead-acid storage battery internal resistance testing method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04134278A (en) * | 1990-09-27 | 1992-05-08 | Ha Yan Tai | Detection of storage of electricity quantity with switching to internal resistance of strage battery under rc provisional load |
| CN1727909A (en) * | 2005-07-28 | 2006-02-01 | 上海交通大学 | Method for detecting internal resistance of accumulator through electromagnetic discharge |
| JP2009063460A (en) * | 2007-09-07 | 2009-03-26 | Yokogawa Electric Corp | Device for measuring internal resistance of cell, and battery-driving sensor using the device |
| CN101806865A (en) * | 2010-03-29 | 2010-08-18 | 深圳睿立方智能科技有限公司 | Detection device of internal resistance of cell and detection method thereof |
| CN103163377A (en) * | 2013-03-13 | 2013-06-19 | 中国南方电网有限责任公司调峰调频发电公司 | Method for detecting internal resistance of storage battery through inductor-capacitor series discharge |
| CN105954592A (en) * | 2016-07-18 | 2016-09-21 | 天津金星奥宇科技有限公司 | Power battery pack internal resistance measurement system |
-
2017
- 2017-12-30 CN CN201711492856.5A patent/CN108152753A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04134278A (en) * | 1990-09-27 | 1992-05-08 | Ha Yan Tai | Detection of storage of electricity quantity with switching to internal resistance of strage battery under rc provisional load |
| CN1727909A (en) * | 2005-07-28 | 2006-02-01 | 上海交通大学 | Method for detecting internal resistance of accumulator through electromagnetic discharge |
| JP2009063460A (en) * | 2007-09-07 | 2009-03-26 | Yokogawa Electric Corp | Device for measuring internal resistance of cell, and battery-driving sensor using the device |
| CN101806865A (en) * | 2010-03-29 | 2010-08-18 | 深圳睿立方智能科技有限公司 | Detection device of internal resistance of cell and detection method thereof |
| CN103163377A (en) * | 2013-03-13 | 2013-06-19 | 中国南方电网有限责任公司调峰调频发电公司 | Method for detecting internal resistance of storage battery through inductor-capacitor series discharge |
| CN105954592A (en) * | 2016-07-18 | 2016-09-21 | 天津金星奥宇科技有限公司 | Power battery pack internal resistance measurement system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113281668A (en) * | 2021-05-26 | 2021-08-20 | 华中科技大学 | Energy storage battery impedance identification method and system based on driving inverter and application |
| CN117031313A (en) * | 2023-07-24 | 2023-11-10 | 广东电网有限责任公司茂名供电局 | Lead-acid storage battery internal resistance testing method |
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