CN115158284B - Hybrid vehicle and electric power correction method and control device thereof - Google Patents
Hybrid vehicle and electric power correction method and control device thereof Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/08—Electric propulsion units
- B60W2510/085—Power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/24—Energy storage means
- B60W2510/242—Energy storage means for electrical energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/086—Power
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Abstract
The embodiment of the invention provides an oil-electric hybrid vehicle, an electric power correction method and a control device thereof, wherein the electric power correction method comprises the steps of obtaining the current electric power of a battery system, the current electric power of a generator and the current electric power of a driving motor, and calculating the total electric power of the three; determining a correction object according to the current working condition of the hybrid electric vehicle, wherein the correction object is a generator or a driving motor; determining that the total electric power exceeds a preset range of the current working condition of the hybrid electric vehicle; the current electric power of the correction object is corrected to obtain corrected electric power, and the current electric power of the correction object is updated to the corrected electric power. The electric power correction method in the embodiment of the invention is beneficial to maintaining the electric energy balance of a high-voltage system in the hybrid electric vehicle, reduces the probability of overcharging and overdischarging of a battery, improves the safety of the hybrid electric vehicle, and reduces the probability of inconvenient electric energy allocation caused by the problem of hardware consistency.
Description
Technical Field
The invention relates to the technical field of vehicle engineering, in particular to a hybrid vehicle and an electric power correction method and a control device thereof.
Background
In recent years, hybrid electric vehicles have become increasingly popular in the marketplace.
In addition to a conventional internal combustion engine, a plurality of high-voltage electric devices belonging to a high-voltage system, such as a high-voltage drive motor, a high-voltage generator, a DCDC (Direct Current) converter, and the like, are generally provided in a hybrid vehicle. The high-voltage system relates to all sides of the whole vehicle running, control and interaction, so that the electric power calculation of the high-voltage system is an important ring in the whole vehicle energy control.
In the related art, parameters involved in calculation of electric power of a high-voltage system are generally derived from measurement and calculation of bench test. In the actual use process of the vehicle, under partial complex working conditions, the calculated value of the electric power of the high-voltage system has larger deviation from the actual value, and the control of the whole vehicle energy is adversely affected.
Disclosure of Invention
In view of the foregoing, it is desirable to provide an electric power correction method, a control device, and an electric hybrid vehicle capable of correcting the accuracy of measurement of electric power of an electric motor and electric power of a drive motor in a high-voltage system of the electric hybrid vehicle.
In order to achieve the above object, the technical solution of the embodiment of the present application is as follows:
An electric power correction method of an oil-electric hybrid vehicle includes:
calculating total electric power: acquiring the current electric power of the battery system, the current electric power of the generator and the current electric power of the driving motor, and calculating the total electric power of the three;
Determining a correction object: determining a correction object according to the current working condition of the hybrid electric vehicle, wherein the correction object is a generator or a driving motor;
comparing the preset range: determining that the total electric power exceeds a preset range of the current working condition of the hybrid electric vehicle;
correction of electric power: and correcting the current electric power of the correction object to obtain corrected electric power, and updating the current electric power of the correction object to the corrected electric power.
In some embodiments, the current electric power of the battery system includes a current electric power of the BMS and a current electric power of the DCDC.
In some embodiments, the step of determining the correction object specifically includes:
when the hybrid vehicle is in a parking charging working condition, determining that the correction object is the generator;
And when the hybrid electric vehicle is in a series working condition or a pure electric driving condition, determining that the correction object is the driving motor.
In some embodiments, the step of correcting the electric power specifically includes:
Updating the compensation electric power of the correction object according to a preset compensation value;
And combining the current calculated electric power of the correction object with the updated compensation electric power of the correction object to obtain the correction electric power of the correction object, and updating the current electric power of the correction object into the correction electric power of the correction object.
In some embodiments, the boundary value of the preset range is the preset compensation value.
In some embodiments, the updating the compensation electric power of the correction object according to the preset compensation value specifically includes:
subtracting the preset compensation value from the current value of the compensation electric power of the correction object to obtain updated compensation electric power of the correction object;
In some embodiments, after the updating the compensation electric power of the correction object according to the preset compensation value, the method further includes:
Determining that the updated compensation electric power of the correction object exceeds an error range;
correcting the calculated electric power of the correction object;
And re-acquiring the current calculated electric power of the correction object.
In some embodiments, the correcting the calculated electric power of the correction object specifically includes:
and checking the bench parameters of the correction object, and updating a power comparison table of the calculated electric power of the correction object according to the checking result.
The re-acquiring the calculated electric power of the current correction object specifically comprises the following steps:
acquiring the current rotating speed and the current torque of the correction object;
and acquiring the current calculated electric power of the correction object corresponding to the current rotating speed and the current torque according to the updated power comparison table of the calculated electric power of the correction object.
The embodiment of the invention also provides a control device, which comprises:
The acquisition module is used for acquiring the current electric power of the battery system, the current electric power of the generator, the current electric power of the driving motor and the current working condition of the oil-electricity hybrid vehicle;
the calculation module is used for calculating the current electric power of the battery system, the current electric power of the generator and the current electric power of the driving motor, and the total electric power of the three;
The determining module is used for determining a correction object and determining that the total electric power exceeds a preset range of the current working condition of the hybrid electric vehicle;
And the correction module is used for correcting the current electric power of the correction object.
The embodiment of the invention also provides an oil-electricity hybrid vehicle, which comprises:
The driving motor is used for driving the vehicle to run;
a battery system for supplying electric power to the driven motor;
a generator for generating electric energy to charge the battery system;
An engine at least for driving the generator to operate;
And the control device described in the foregoing embodiment.
According to the electric power correction method, only one of the generator and the driving motor is corrected under different working conditions, so that the purpose of distinguishing electric power errors generated by the generator and the driving motor is achieved, and the correction of the one of the generator and the driving motor is facilitated; by setting the preset range, the step of triggering the correction electric power is realized, and meanwhile, the correction of the correction object is prevented from being too frequent, so that the data processing speed of the system is improved; the current electric power of the correction object is updated to be the correction electric power of the correction object, so that the total electric power can be better maintained in a preset range, the electric energy balance of a high-voltage system in the hybrid electric vehicle is maintained, the VCU is convenient for electric energy allocation of the high-voltage system in the hybrid electric vehicle, the probability of overcharge and overdischarge of a battery is reduced, the safety of the hybrid electric vehicle is improved, and the probability of inconvenient electric energy allocation caused by the problem of hardware consistency is reduced.
Drawings
FIG. 1 is a step diagram of an electric power correction method according to an embodiment of the invention;
FIG. 2 is a flow chart of only modifying the electric power of the generator when the hybrid vehicle is in a park charge condition in accordance with an embodiment of the present invention;
FIG. 3 is a flow chart of only correcting the electric power of the driving motor when the hybrid vehicle is in the park charging condition according to an embodiment of the invention;
fig. 4 is a schematic diagram of a control device according to an embodiment of the invention.
Description of the reference numerals
A control device 10; an acquisition module 11; a calculation module 12; a determining module 13; correction module 14
Detailed Description
It should be noted that, in the case of no conflict, the embodiments of the present application and the technical features of the embodiments may be combined with each other, and the detailed description in the specific embodiments should be interpreted as an explanation of the gist of the present application and should not be construed as unduly limiting the present application.
In the related art, the main way to obtain the current electric power of the generator or the driving motor is mainly to measure the electric power of the generator or the driving motor in different rotation speeds and torque states by adopting a bench test, so as to form a power comparison table of the generator or the driving motor with respect to rotation speed and torque factors; after the generator or the driving motor is loaded, the current electric power of the generator or the driving motor is indirectly obtained by acquiring the rotating speed and the torque of the hybrid electric vehicle under the current working condition and inquiring a power comparison table. Due to the influences of factors such as errors of manufacturing precision of the generator or the driving motor, large difference between actual operation working conditions of the hybrid electric vehicle and bench test working conditions, and the like, in the actual operation process of the hybrid electric vehicle, larger errors exist between the current electric power and the actual electric power of the generator or the driving motor obtained in the related technology.
The embodiment of the invention provides an electric power correction method of a hybrid electric vehicle, referring to fig. 1, the electric power correction method comprises the following steps:
s1: calculating total electric power: the current electric power of the battery system, the current electric power of the generator and the current electric power of the driving motor are obtained, and the total electric power of the three is calculated.
It is understood that the battery system is provided with a current sensor and a voltage sensor for measuring various types of devices. Therefore, the current value and the voltage value of various devices in the battery system of the hybrid electric vehicle under various working conditions can be measured in real time through the current sensors and the voltage sensors, and the current electric power of the battery system is calculated and obtained to be the actual electric power of the battery system.
It will be appreciated that some of the various types of devices in the battery system are generating power and some are consuming power, the generator is generating power and the drive motor is consuming power. Therefore, according to the law of conservation of energy, the total electric power of the three is theoretically 0.
However, since the obtained current electric power and the actual electric power of the generator and the driving motor have a certain error, the actual value of the total electric power of the three is floated around 0 value.
S2: determining a correction object: and determining a correction object according to the current working condition of the hybrid electric vehicle, wherein the correction object is a generator or a driving motor.
Since errors exist in the current electric power of the engine and the current electric power of the driving motor, only one of the generator and the driving motor which are required to be corrected under different working conditions are determined, so that adverse effects on correction caused by mutual interference of data of the generator and the driving motor are avoided.
S3: comparing the preset range: and determining that the total electric power exceeds a preset range of the current working condition of the hybrid electric vehicle.
That is, the total electric power exceeds the preset range of the current operating condition under the influence of the current electric power error of the correction target.
Since the actual value of the total electric power floats around the value of 0, the upper limit value of the preset range is a positive value, and the lower limit value is a negative value.
S4: correction of electric power: the current electric power of the correction object is corrected to obtain corrected electric power, and the current electric power of the correction object is updated to the corrected electric power. So that the value of the total electric power is within a preset range.
According to the electric power correction method, only one of the generator and the driving motor is corrected under different working conditions, so that the purpose of distinguishing electric power errors generated by the generator and the driving motor is achieved, and the correction of the one of the generator and the driving motor is facilitated; by setting the preset range, the step of triggering the correction electric power is realized, and meanwhile, the correction of the correction object is prevented from being too frequent, so that the data processing speed of the system is improved; the current electric power of the correction object is updated to be the correction electric power of the correction object, so that the total electric power can be better maintained in a preset range, the electric energy balance of a high-voltage system in the hybrid electric vehicle is favorably maintained, the VCU (Vehicle Control Unit, whole vehicle control unit) is convenient for electric energy allocation of the high-voltage system in the hybrid electric vehicle, the probability of overcharge and overdischarge of a battery is reduced, the safety of the hybrid electric vehicle is improved, and the probability of inconvenient electric energy allocation caused by the problem of hardware consistency is reduced.
It will be appreciated that there is no logical relationship between calculating the total electrical power and determining the correction object. Thus, the order between step S1 and step S2 is not limited, and step S1 may precede step S2; step S2 may precede step S1.
It is understood that, after completing the process from step S1 to step S4 once, the total electric power may still fail to be within the preset range. Therefore, the processes from step S1 to step S4 of the electric power correction method in the embodiment of the present invention may be repeated multiple times, and the purpose that the total electric power is within the preset range is finally achieved by correcting the electric power of the correction object multiple times under the same working condition.
It can be understood that after the correction of one of the generator and the driving motor is completed, the hybrid vehicle may be controlled to change the working condition so that the working condition meets the requirement that the correction object is the other of the generator and the driving motor, and then the flow of step S3 and step S4 of the electric power correction method in the embodiment of the present invention is executed, so as to implement the correction of the electric power of the other of the generator and the driving motor.
It can be understood that the working condition of the hybrid vehicle can be controlled manually so as to purposefully correct the correction object corresponding to the working condition; the VCU may also monitor the current working condition of the hybrid vehicle in real time to adjust the corresponding correction object in real time.
The total electric power is the sum of the current electric power of the battery system, the current electric power of the generator and the current electric power of the driving motor.
In some embodiments, the current electric power of the Battery system includes the current electric power of the BMS (Battery MANAGEMENT SYSTEM) and the current electric power of the DCDC.
The current electric power of the BMS refers to the charge and discharge power of the power battery in the current state. The method is obtained by monitoring the voltage value and the current value in the charging and discharging process and calculating the product of the voltage value and the current value.
The present electric power of DCDC refers to the consumed electric power of DCDC in the present state. The voltage value and the current value in the power consumption process are monitored, and the product of the voltage value and the current value is calculated.
In some embodiments, the step of determining a correction object specifically includes:
when the hybrid vehicle is in the parking charging working condition, the correction object is determined to be a generator. Under the working condition, the hybrid vehicle is in a static state, the driving motor does not work, and the engine drives the generator to generate electricity so as to charge the power battery. Therefore, the current electric power of the drive motor is 0, the total electric power is actually calculated from the current electric power of the battery system and the current electric power of the generator, and the change in the total electric power is determined from the current electric power of the generator on the premise that the current electric power of the battery system can be obtained in real time. The process of correcting the electric power only needs to consider the current electric power of the generator as a single variable, so that the correction step is simplified, and the speed of correction processing is improved.
When the hybrid vehicle is in the pure electric driving condition, the correction object is determined to be a driving motor. Under the working condition, the generator does not work, and power is supplied to the driving motor through the power battery. Therefore, the current electric power of the generator is 0, the total electric power is actually calculated from the current electric power of the battery system and the current electric power of the drive motor, and the change of the total electric power is determined from the current electric power of the drive motor on the premise that the current electric power of the battery system can be obtained in real time. The process of correcting the electric power only needs to consider the current electric power of the driving motor, so that the correction step is simplified, and the speed of correction processing is improved.
When the hybrid vehicle is in the working condition of series connection, the correction object is determined to be a driving motor. Under the working condition, the generator and the driving motor work, the generator generates electricity to charge the power battery, and meanwhile, the power battery supplies power to the driving motor to drive the oil-electricity hybrid vehicle to run. Before this condition, the hybrid vehicle has charged the power battery by park charging, and the correction of the electric power of the generator has been completed. Accordingly, on the premise that the current electric power of the battery system can be obtained in real time and the current electric power of the generator has been corrected, the change in the total electric power is determined by the current electric power of the drive motor. So that the process of modifying the electric power only needs to take into account the single variable of the current electric power of the drive motor.
It can be understood that the above three working conditions cover the main running state of the hybrid electric vehicle, so that the hybrid electric vehicle can constantly execute the electric power correction method in the embodiment of the invention in the running process, and the electric energy allocation of the hybrid electric vehicle to the high-voltage system in the running process is more reasonable.
In some embodiments, the absolute values of the upper and lower values of the preset range are the same.
It is understood that the preset range includes a first preset range and a second preset range. When the correction object is a generator, the correction object is a first preset range correspondingly; when the correction object is a driving motor, the correction object is a second preset range correspondingly. The first preset range and the second preset range may be the same or different.
In some embodiments, the step of modifying the electric power specifically includes:
updating the compensation electric power of the correction object according to the preset compensation value;
And combining the calculated electric power of the current correction object with the updated compensation electric power of the correction object to obtain the correction electric power of the correction object, and updating the current electric power of the correction object into the correction electric power of the correction object.
It is understood that the initial value of the compensation electric power of the generator and the initial value of the compensation electric power of the driving motor are both 0.
The value of the preset compensation value for updating the compensation electric power of the generator may be the same as or different from the value of the preset compensation value for updating the compensation electric power of the driving motor.
The calculated electric power of the correction object, that is, the electric power corresponding to the rotation speed and the torque under the current working condition is obtained based on the corresponding relation of the electric power of the correction object obtained through the bench test and the rotation speed and the torque.
In some embodiments, the calculated electric power of the correction object is obtained by looking up a power map for the rotational speed and torque factors. The power MAP table is a motor power MAP table in the related art.
It should be noted that, the specific manner of obtaining the power comparison table about the rotation speed and torque factors through the bench test and the manner of obtaining the power value by querying the power comparison table through the current rotation speed and torque under different working conditions have been widely used in the related art, and will not be described herein.
Under the corrected working condition of the corrected current correction object, the total electric power is calculated from the current electric power of the battery system, the calculated electric power of the correction object and the compensation electric power of the correction object. After the preset compensation value updates the compensation electric power of the correction object, the value of the compensation electric power of the correction object changes. Therefore, the change of the total electric power is realized through the preset compensation value, and finally the aim of regulating and controlling the total electric power to be in the preset range is fulfilled.
The specific value of the preset compensation value is not limited.
The boundary value of the preset range is a preset compensation value.
In some embodiments, updating the compensation electric power of the correction object according to the preset compensation value specifically includes:
Subtracting the preset compensation value from the current value of the compensation electric power of the correction object to obtain updated compensation electric power of the correction object.
It is understood that the preset compensation values include a positive compensation value and a negative compensation value, and the corresponding preset compensation values are respectively selected according to the total electric power being positive and negative.
The value of the total electric power is brought back into or brought close to the preset range by subtracting the preset compensation value from the value of the compensation electric power of the correction object. For example, if the value of the total electric power is greater than a positive boundary value of the preset range, the compensation electric power of the correction object is subtracted by the positive compensation value, so that the current electric power of the correction object is reduced, thereby reducing the total electric power; for another example, if the value of the total electric power is smaller than the negative boundary value of the preset range, the negative compensation value is subtracted from the compensation electric power of the correction object, so that the current electric power of the correction object is increased, and the total electric power is increased.
It can be understood that, on the premise that the working condition is unchanged, the value of the compensation electric power of the correction object in the correction method executed this time is the value obtained by subtracting the preset compensation value from the value of the compensation electric power of the correction object in the correction method executed last time. So that the value of the total electric power gradually approaches the preset range until returning to the preset range after the process of performing the correction a plurality of times.
In an embodiment in which the calculated electric power of the correction object is acquired through the power map, a power map of the compensation electric power of the correction object is set, the power map of the compensation electric power being identical to the power and torque section and the node value referred to by the power map of the calculated electric power. And updating the compensation electric power of the correction object, namely updating the compensation electric power corresponding to the current rotating speed and torque of the correction object under the current working condition.
In some embodiments, after updating the compensation electric power of the correction object according to the preset compensation value, further comprising:
determining that the updated compensation electric power of the correction object exceeds the error range;
Correcting the calculated electric power of the correction object;
The current calculated electric power of the correction object is retrieved.
It is understood that the error range includes positive error boundary values and negative error boundary values.
If the value of the compensation electric power of the correction object exceeds the error range after the compensation electric power of the correction object is updated by a plurality of times of preset compensation values. This means that there is a large error in the calculated electric power itself of the correction target. Therefore, it is necessary to correct the calculation manner of the calculated electric power of the correction target again to reduce the error of the calculated electric power of the correction target, and finally, to make the total electric power within the preset range.
It is understood that the error range includes a first error range and a second error range. When the correction object is a generator, the correction object is a first error range correspondingly; when the correction object is a driving motor, the correction object is correspondingly a second error range. The first error range and the second error range may be the same or different.
In some embodiments, correcting the calculated electric power of the correction object specifically includes:
and checking the bench parameters of the correction object, and updating a power comparison table of the calculated electric power of the correction object according to the checking result.
And (3) re-carrying out bench test on the correction object to re-acquire the electric power of the correction object corresponding to different rotating speeds and different torques, thereby reducing errors existing in the calculated electric power of the correction object.
The method for re-acquiring the calculated electric power of the current correction object specifically comprises the following steps:
Acquiring the current rotating speed and the current torque of the correction object;
And acquiring the current calculated electric power of the correction object corresponding to the current rotating speed and the current torque according to the updated power comparison table of the calculated electric power of the correction object.
The error of the current electric power of the correction object is reduced through the updated calculated electric power of the correction object, so that the error of the total electric power is reduced, and the total electric power is favorable to return to the preset range.
It can be understood that after the correction of the calculated electric power of the correction object is completed, the compensation electric power of the correction object is cleared to prevent the error of the calculated electric power of the correction object from decreasing, and the data of the current electric power of the correction object is distorted due to the compensation electric power of the correction object, thereby causing the error of the total electric power to expand.
Referring to fig. 2, an embodiment of an electric power correction method according to an embodiment of the present invention uses a generator as a correction object is as follows:
s201: when the hybrid vehicle is in the parking charging working condition, the correction object is determined to be a generator.
S202: the current electric power of the BMS, the current electric power of the DCDC, the current calculated electric power of the generator, and the current compensated electric power of the generator are acquired, and the total electric power of the four is calculated.
S203: judging whether the total electric power exceeds a first preset range. If yes, go to step S204; if not, go to step S202.
S204: subtracting a preset compensation value of the generator from the current value of the compensation electric power of the generator to obtain updated compensation electric power of the generator.
S205: and judging whether the updated compensation electric power of the generator exceeds a first error range. If yes, go to step S207; if not, go to step S206.
S206: and combining the calculated electric power of the current generator with the updated compensation electric power of the generator to obtain the corrected electric power of the generator, and updating the current electric power of the generator into the corrected electric power of the generator. After the execution is completed, step S202 is executed.
S207: and checking bench parameters of the generator, and updating a power comparison table of the calculated electric power of the generator according to the checking result.
S208: the current rotational speed and the current torque of the generator are obtained.
S209: and obtaining the current calculated electric power of the generator corresponding to the current rotating speed and the current torque according to the updated power comparison table of the calculated electric power of the generator. After the execution is completed, step S202 is executed.
It will be appreciated that when the hybrid vehicle is in the park-charge condition, the above-described processes of steps S201 to S209 are repeatedly performed, so that the updated corrected electric power of the generator maintains the total electric power within the first preset range.
Referring to fig. 3, a specific embodiment of the electric power correction method according to the embodiment of the present invention, which uses a driving motor as a correction object, is as follows:
S301: when the hybrid vehicle is in the pure electric driving condition, the correction object is determined to be a driving motor.
S302: the current electric power of the BMS, the current electric power of the DCDC, the current calculated electric power of the driving motor, and the current compensated electric power of the driving motor are acquired, and the total electric power of the four is calculated.
S303: and judging whether the total electric power exceeds a second preset range. If yes, executing step S304; if not, go to step S302.
S304: subtracting the preset compensation value of the driving motor from the current value of the compensation electric power of the driving motor to obtain updated compensation electric power of the driving motor.
S305: and judging whether the updated compensation electric power of the driving motor exceeds a second error range. If yes, go to step S307; if not, go to step S306.
S306: and combining the calculated electric power of the current driving motor with the updated compensation electric power of the driving motor to obtain the corrected electric power of the driving motor, and updating the current electric power of the driving motor into the corrected electric power of the driving motor. After the execution is completed, step S302 is executed.
S307: and checking the rack parameters of the driving motor, and updating a power comparison table of the calculated electric power of the driving motor according to the checking result.
S308: the current rotation speed and the current torque of the driving motor are obtained.
S309: and obtaining the current calculated electric power of the driving motor corresponding to the current rotating speed and the current torque according to the updated power comparison table of the calculated electric power of the driving motor. After the execution is completed, step S302 is executed.
It is understood that the above-described processes of steps S301 to S309 are repeatedly performed when the hybrid vehicle is in the all-electric drive condition, so that the updated corrected electric power of the drive motor maintains the total electric power within the second preset range.
The embodiment of the invention also provides a control device 10, referring to fig. 4, the control device 10 includes an acquisition module 11, a calculation module 12, a determination module 13 and a correction module 14, where the acquisition module 11 is used to acquire current electric power of the battery system, current electric power of the generator, current electric power of the driving motor and current working condition of the hybrid vehicle; the calculating module 12 is used for calculating the current electric power of the battery system, the current electric power of the generator and the current electric power of the driving motor, and the total electric power of the three; the determining module 13 is used for determining a correction object and determining that the total electric power exceeds a preset range of the current working condition of the hybrid electric vehicle; the correction module 14 is used for correcting the current electric power of the correction object.
The embodiment of the invention also provides an oil-electricity hybrid vehicle, which comprises a driving motor, a generator, a battery system, an engine and the control device 10 in the previous embodiment, wherein the driving motor is used for driving the vehicle to run; the battery system is used for providing electric energy for the driven motor; the generator is used for generating electric energy to charge the battery system; the engine is used at least to drive the generator to operate.
The present invention also provides a storage medium including a stored program, wherein the program, when run, controls a device in which the storage medium is located to perform the correction method of any one of the foregoing embodiments.
Correspondingly, an embodiment of the invention provides a computer device, which comprises a memory and a processor, wherein the memory stores a computer program capable of running on the processor, and the processor executes the program to realize the steps in the correction method in the previous embodiment.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, where the program, when executed, performs steps including the above method embodiments; and the aforementioned storage medium includes: a mobile storage device, a Read Only Memory (ROM), a magnetic disk or an optical disk, or the like, which can store program codes.
Or the above-described integrated units of the invention may be stored in a computer-readable storage medium if implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, the technical solution of the embodiments of the present invention may be essentially or part of what contributes to the related art may be embodied in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the methods of the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a removable storage device, a ROM, a magnetic disk, or an optical disk.
The various embodiments/implementations provided by the application may be combined with one another without contradiction.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. An electric power correction method of an oil-electric hybrid vehicle, characterized by comprising:
calculating total electric power: acquiring the current electric power of the battery system, the current electric power of the generator and the current electric power of the driving motor, and calculating the total electric power of the three;
Determining a correction object: determining a correction object according to the current working condition of the hybrid electric vehicle, wherein the correction object is a generator or a driving motor;
comparing the preset range: determining that the total electric power exceeds a preset range of the current working condition of the hybrid electric vehicle;
correction of electric power: and correcting the current electric power of the correction object to obtain corrected electric power, and updating the current electric power of the correction object to the corrected electric power.
2. The electric power correction method according to claim 1, wherein the current electric power of the battery system includes a current electric power of the BMS and a current electric power of the DCDC.
3. The electric power correction method according to claim 1, wherein the step of determining the correction object specifically includes:
when the hybrid vehicle is in a parking charging working condition, determining that the correction object is the generator;
And when the hybrid electric vehicle is in a series working condition or a pure electric driving condition, determining that the correction object is the driving motor.
4. The electric power correction method according to claim 1, wherein the step of correcting electric power specifically includes:
Updating the compensation electric power of the correction object according to a preset compensation value;
And combining the current calculated electric power of the correction object with the updated compensation electric power of the correction object to obtain the correction electric power of the correction object, and updating the current electric power of the correction object into the correction electric power of the correction object.
5. The electric power correction method according to claim 4, wherein the boundary value of the preset range is the preset compensation value.
6. The electric power correction method according to claim 4, wherein the updating the compensation electric power of the correction object according to the preset compensation value specifically includes:
subtracting the preset compensation value from the current value of the compensation electric power of the correction object to obtain updated compensation electric power of the correction object.
7. The electric power correction method according to claim 4, characterized by further comprising, after said updating the compensation electric power of the correction object according to a preset compensation value:
Determining that the updated compensation electric power of the correction object exceeds an error range;
correcting the calculated electric power of the correction object;
And re-acquiring the current calculated electric power of the correction object.
8. The electric power correction method according to claim 7, characterized in that said correcting the calculated electric power of the correction object specifically includes:
checking the bench parameters of the correction object, and updating a power comparison table of the calculated electric power of the correction object according to the checking result;
the re-acquiring the calculated electric power of the current correction object specifically comprises the following steps:
acquiring the current rotating speed and the current torque of the correction object;
and acquiring the current calculated electric power of the correction object corresponding to the current rotating speed and the current torque according to the updated power comparison table of the calculated electric power of the correction object.
9. A control device, characterized in that the control device comprises:
The acquisition module is used for acquiring the current electric power of the battery system, the current electric power of the generator, the current electric power of the driving motor and the current working condition of the oil-electricity hybrid vehicle;
the calculation module is used for calculating the current electric power of the battery system, the current electric power of the generator and the current electric power of the driving motor, and the total electric power of the three;
The determining module is used for determining a correction object and determining that the total electric power exceeds a preset range of the current working condition of the hybrid electric vehicle;
And the correction module is used for correcting the current electric power of the correction object.
10. An electric-hybrid vehicle, characterized in that it comprises:
The driving motor is used for driving the vehicle to run;
a battery system for supplying electric power to the driven motor;
a generator for generating electric energy to charge the battery system;
An engine at least for driving the generator to operate;
And a control device according to claim 9.
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| CN108556644A (en) * | 2018-03-20 | 2018-09-21 | 广州汽车集团股份有限公司 | A kind of hybrid vehicle distance increasing unit power follow-up control method and system |
| CN114435341A (en) * | 2022-04-12 | 2022-05-06 | 临工集团济南重机有限公司 | Power generation method and device of hybrid electric vehicle and vehicle |
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| JP4001102B2 (en) * | 2003-11-25 | 2007-10-31 | 日産自動車株式会社 | Vehicle drive torque control device |
| CN114715128B (en) * | 2022-03-16 | 2024-09-24 | 东风汽车集团股份有限公司 | Stepped overcharge inhibition control method for hybrid electric vehicle and hybrid electric vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108556644A (en) * | 2018-03-20 | 2018-09-21 | 广州汽车集团股份有限公司 | A kind of hybrid vehicle distance increasing unit power follow-up control method and system |
| CN114435341A (en) * | 2022-04-12 | 2022-05-06 | 临工集团济南重机有限公司 | Power generation method and device of hybrid electric vehicle and vehicle |
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