CN116572927A - Vehicle power battery control method and device, vehicle and storage medium - Google Patents

Vehicle power battery control method and device, vehicle and storage medium Download PDF

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Publication number
CN116572927A
CN116572927A CN202310624130.1A CN202310624130A CN116572927A CN 116572927 A CN116572927 A CN 116572927A CN 202310624130 A CN202310624130 A CN 202310624130A CN 116572927 A CN116572927 A CN 116572927A
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Prior art keywords
power
maximum discharge
available maximum
vehicle
discharge power
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CN202310624130.1A
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Chinese (zh)
Inventor
杨亚冬
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Chery Intelligent Automotive Technology Hefei Co ltd
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Chery Intelligent Automotive Technology Hefei Co ltd
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Priority to CN202310624130.1A priority Critical patent/CN116572927A/en
Publication of CN116572927A publication Critical patent/CN116572927A/en
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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
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • 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
    • B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The application relates to a power battery control method and device for a vehicle, the vehicle and a storage medium, wherein the method comprises the following steps: identifying a current whole vehicle working mode of the vehicle; determining available maximum discharge power of a power battery of the vehicle according to the whole vehicle working mode, and generating an optimal power output strategy of the power battery based on the available maximum discharge power; the power cell output power is controlled based on the optimal power output strategy and the actual load power demand of the vehicle. Therefore, the technical problem that in the related art, the discharging capability of the battery is difficult to fully release due to the fact that the power composition of the hybrid electric vehicle is different in different working modes is solved, and the service life of the battery is shortened is solved.

Description

Vehicle power battery control method and device, vehicle and storage medium
Technical Field
The present application relates to the field of power battery technologies, and in particular, to a method and apparatus for controlling a power battery of a vehicle, and a storage medium.
Background
The hybrid electric vehicle comprises two sets of power assemblies, wherein two working modes of hybrid and pure electric are available, and an engine and a power battery can be used as power sources.
In the related art, the whole vehicle controller can logically control the intervention of different power sources to serve as the whole vehicle driving force according to the comprehensive consideration of the whole vehicle working condition and the discharging capacity of the power battery.
However, in the related art, when the power discharge control of the current power battery is performed, the power composition is not considered to be different in different working modes of the hybrid vehicle type, the degree of the power demand on the battery is different in different working modes, so that the discharging capability of the battery is difficult to be fully released, and the safety discharge protection measures on the battery are insufficient, so that the service life of the battery is reduced, and the improvement is needed.
Disclosure of Invention
The application provides a power battery control method and device for a vehicle, the vehicle and a storage medium, and aims to solve the technical problem that in the related art, the discharging capability of a battery is difficult to fully release due to the fact that the power composition of a hybrid electric vehicle type is different in different working modes, so that the service life of the battery is shortened.
An embodiment of a first aspect of the present application provides a power battery control method for a vehicle, including the steps of: identifying a current whole vehicle working mode of the vehicle; determining available maximum discharge power of a power battery of the vehicle according to the whole vehicle working mode, and generating an optimal power output strategy of the power battery based on the available maximum discharge power; and controlling the power battery output power based on the optimal power output strategy and an actual load power demand of the vehicle.
Optionally, in an embodiment of the present application, the identifying a current vehicle operation mode of the vehicle includes: acquiring power source state information of the vehicle; and determining a current whole vehicle working mode of the vehicle according to the power source state information, wherein the current whole vehicle working mode is a hybrid working mode, a cold start working mode or a pure electric working mode.
Optionally, in one embodiment of the present application, the determining the available maximum discharge power of the power battery of the vehicle according to the whole vehicle operation mode, and generating the optimal power output strategy of the power battery based on the available maximum discharge power includes: and if the whole vehicle working mode is the hybrid working mode, inquiring a preset power meter to obtain a first available maximum discharge power and a second available maximum discharge power of the hybrid working mode, wherein the first available maximum discharge power is larger than the second available maximum discharge power, and controlling a strategy of smooth output of the power battery based on the first available maximum discharge power and the second available maximum discharge power.
Optionally, in one embodiment of the present application, the strategy for controlling the smooth output of the power battery based on the first available maximum discharge power and the second available maximum discharge power includes: calculating a first product value of the current and the voltage output by the power battery; judging whether the first product value meets a preset first judging condition or not; and if the first product value meets the preset first judgment condition, controlling the power battery to reduce the available maximum discharge power from the first available maximum discharge power to the second available maximum discharge power according to a first preset speed, otherwise, controlling the power battery to reduce the maximum discharge power to the second available maximum discharge power according to a second preset speed, wherein the first preset speed is larger than the second preset speed.
Optionally, in one embodiment of the present application, the determining the available maximum discharge power of the power battery of the vehicle according to the whole vehicle operation mode, and generating the optimal power output strategy of the power battery based on the available maximum discharge power includes: and if the whole vehicle working mode is the cold start working mode, the optimal power output strategy is a strategy for keeping the maximum available discharge power of the cold start working mode for output.
Optionally, in one embodiment of the present application, the determining the available maximum discharge power of the power battery of the vehicle according to the whole vehicle operation mode, and generating the optimal power output strategy of the power battery based on the available maximum discharge power includes: and if the whole vehicle working mode is the pure electric working mode, inquiring a preset power meter to obtain third available maximum discharge power and fourth available maximum discharge power of the pure electric working mode, wherein the third available maximum discharge power is larger than the fourth available maximum discharge power, and controlling a strategy of smooth output of the power battery based on the third available maximum discharge power and the fourth available maximum discharge power.
Optionally, in one embodiment of the present application, the strategy for controlling the smooth output of the power battery based on the third available maximum discharge power and the fourth available maximum discharge power includes: calculating a second product value of the current and the voltage output by the power battery; judging whether the second product value meets a preset second judging condition or not; and if the second product value meets the preset second judging condition, controlling the power battery to reduce the available maximum discharge power from the third available maximum discharge power to the fourth available maximum discharge power according to a third preset speed, otherwise, controlling the power battery to reduce the maximum discharge power to the fourth available maximum discharge power according to a fourth preset speed, wherein the third preset speed is larger than the fourth preset speed.
An embodiment of a second aspect of the present application provides a power battery control device for a vehicle, including: the identification module is used for identifying the current whole vehicle working mode of the vehicle; the generation module is used for determining the available maximum discharge power of the power battery of the vehicle according to the whole vehicle working mode and generating the optimal power output strategy of the power battery based on the available maximum discharge power; and a control module for controlling the power battery output power based on the optimal power output strategy and an actual load power demand of the vehicle.
Optionally, in one embodiment of the present application, the identification module includes: a first acquisition unit configured to acquire power source state information of the vehicle; and the determining unit is used for determining the current whole vehicle working mode of the vehicle according to the power source state information, wherein the current whole vehicle working mode is a hybrid working mode, a cold start working mode or a pure electric working mode.
Optionally, in one embodiment of the present application, the generating module includes: the second obtaining unit is configured to query a preset power meter when the whole vehicle working mode is the hybrid working mode, and obtain a first available maximum discharge power and a second available maximum discharge power of the hybrid working mode, where the first available maximum discharge power is greater than the second available maximum discharge power, and control a strategy of smooth output of the power battery based on the first available maximum discharge power and the second available maximum discharge power.
Optionally, in one embodiment of the present application, the second obtaining unit includes: a first calculating subunit, configured to calculate a first product value of the current and the voltage output by the power battery; a first judging subunit, configured to judge whether the first product value meets a preset first judging condition; and the first control subunit is used for controlling the power battery to reduce the available maximum discharge power from the first available maximum discharge power to the second available maximum discharge power according to a first preset speed when the first product value meets the preset first judgment condition, otherwise controlling the power battery to reduce the maximum discharge power to the second available maximum discharge power according to a second preset speed, wherein the first preset speed is greater than the second preset speed.
Optionally, in an embodiment of the present application, the generating module is further configured to, when the whole vehicle working mode is the cold start working mode, make the best power output strategy be a strategy of keeping the maximum available discharge power in the cold start working mode for output.
Optionally, in one embodiment of the present application, the generating module includes: and the second acquisition unit is used for inquiring a preset power meter when the whole vehicle working mode is the pure electric working mode to obtain third available maximum discharge power and fourth available maximum discharge power of the pure electric working mode, wherein the third available maximum discharge power is larger than the fourth available maximum discharge power, and the strategy of controlling smooth output of the power battery is controlled based on the third available maximum discharge power and the fourth available maximum discharge power.
Optionally, in one embodiment of the present application, the second obtaining unit includes: a second calculating subunit, configured to calculate a second product value of the current and the voltage output by the power battery; the second judging subunit is used for judging whether the second product value meets a preset second judging condition; and the second control subunit is used for controlling the power battery to reduce the available maximum discharge power from the third available maximum discharge power to the fourth available maximum discharge power according to a third preset speed when the second product value meets the preset second judging condition, otherwise, controlling the power battery to reduce the maximum discharge power to the fourth available maximum discharge power according to a fourth preset speed, wherein the third preset speed is larger than the fourth preset speed.
An embodiment of a third aspect of the present application provides a vehicle including: the power battery control device of a vehicle as described in the above embodiment.
A fourth aspect embodiment of the application provides a computer readable storage medium storing computer program code which, when run on a computer, causes the computer to perform the method of controlling a power battery of a vehicle of the first aspect or any one of the possible implementations of the first aspect.
According to the embodiment of the application, the available maximum discharge power of the power battery of the corresponding vehicle can be determined according to different working modes of the whole vehicle, so that the optimal power output strategy of the power battery is generated based on the available maximum discharge power, the output power of the power battery is controlled based on the optimal power output strategy and the actual load power requirement of the vehicle, the available maximum discharge power of the battery under different working conditions is greatly improved, the power performance of the whole vehicle is ensured, and the service life of the power battery is prolonged. Therefore, the technical problems that in the related art, the discharging capability of the battery is difficult to fully release due to the fact that the power composition of the hybrid electric vehicle type is different in different working modes in the related art are solved, and the service life of the battery is shortened are solved.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a flowchart of a power battery control method of a vehicle according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a power battery control method of a vehicle according to one embodiment of the application;
fig. 3 is a schematic structural view of a power battery control device for a vehicle according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a vehicle according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.
The following describes a power battery control method, apparatus, vehicle, and storage medium of a vehicle according to an embodiment of the present application with reference to the accompanying drawings. Aiming at the technical problems that in the related art mentioned in the background art, the discharging capability of a battery is difficult to fully release due to different power compositions of a hybrid electric vehicle in different working modes, so that the service life of the battery is reduced, the application provides a power battery control method of a vehicle. Therefore, the technical problems that in the related art, the discharging capability of the battery is difficult to fully release due to the fact that the power composition of the hybrid electric vehicle type is different in different working modes in the related art are solved, and the service life of the battery is shortened are solved.
Specifically, fig. 1 is a schematic flow chart of a power battery control method of a vehicle according to an embodiment of the present application.
As shown in fig. 1, the power battery control method of the vehicle includes the steps of:
in step S101, a current vehicle operation mode of the vehicle is identified.
In the actual execution process, the embodiment of the application can acquire the working mode of the whole vehicle in real time through the power battery of the vehicle, so that the discharge power of the power battery is adjusted according to different working modes, thereby improving the available maximum discharge power of the battery under different working conditions, ensuring the power performance of the whole vehicle and prolonging the service life of the power battery.
Optionally, in one embodiment of the present application, identifying a current vehicle operation mode of the vehicle includes: acquiring power source state information of a vehicle; and determining the current whole vehicle working mode of the vehicle according to the power source state information, wherein the current whole vehicle working mode is a hybrid working mode, a cold start working mode or a pure electric working mode.
Specifically, the embodiment of the application can acquire the power source state information of the vehicle, including the number of power sources, the type of the power sources and the like of the vehicle currently working, wherein the power sources refer to an engine and a power battery. The embodiment of the application can determine the current whole vehicle working mode of the vehicle according to the power source state information and in combination with the current state of the vehicle, such as the low-temperature cold start state, the normal running state and the like of the vehicle.
When the two power sources are discharged simultaneously, the current working mode of the whole vehicle is a mixed working mode, namely, the two power sources provide power requirements for the whole vehicle;
when the whole vehicle is cold started at low temperature, the current whole vehicle working mode is a cold starting working mode;
when only the power battery is discharged, the current whole vehicle working mode is a pure electric working mode, namely a power source is used for providing power for the whole vehicle.
In step S102, an available maximum discharge power of the power battery of the vehicle is determined according to the vehicle operation mode, and an optimal power output strategy of the power battery is generated based on the available maximum discharge power.
Further, the embodiment of the application can determine the available maximum discharge power of the power battery of the vehicle according to the hybrid working mode, the cold start working mode or the pure electric working mode respectively, so as to obtain the optimal power output strategy of the power battery.
The discharging power refers to that the power battery can be obtained through table lookup according to the temperature, the state of the System On Chip (SOC) and a certain discharging time.
Optionally, in one embodiment of the present application, determining an available maximum discharge power of a power battery of the vehicle according to a vehicle operation mode, and generating an optimal power output strategy of the power battery based on the available maximum discharge power includes: if the whole vehicle working mode is a hybrid working mode, a preset power meter is inquired to obtain a first available maximum discharge power and a second available maximum discharge power of the hybrid working mode, wherein the first available maximum discharge power is larger than the second available maximum discharge power, and a strategy of controlling smooth output of the power battery based on the first available maximum discharge power and the second available maximum discharge power is adopted.
As a possible implementation manner, when the whole vehicle working mode is the hybrid working mode, the embodiment of the application can obtain the first available maximum discharge power, namely 30S discharge power P by inquiring the preset power meter 30S And a second available maximum discharge power, i.e. sustained discharge power P cont Wherein, 30S discharge power P 30S Greater than the sustained discharge power P cont 。
The embodiment of the application can be based on 30S discharge power P 30S And sustained discharge power P cont And controlling the smooth output of the power battery.
Optionally, in one embodiment of the present application, a strategy for controlling smooth output of a power cell based on a first available maximum discharge power and a second available maximum discharge power includes: calculating a first product value of current and voltage output by the power battery; judging whether the first product value meets a preset first judging condition or not; and if the first product value meets a preset first judgment condition, controlling the power battery to reduce the available maximum discharge power from the first available maximum discharge power to the second available maximum discharge power according to a first preset speed, otherwise, controlling the power battery to reduce the maximum discharge power to the second available maximum discharge power according to a second preset speed, wherein the first preset speed is larger than the second preset speed.
Specifically, in the embodiment of the present application, the discharge power P is 30S 30S And sustained discharge power P cont Smooth switching between means that the power battery is first operated according to P 30S The power is reported to the whole vehicle, and the power battery calculates the first product value P of the current and the voltage of the power output in real time now When P now ≥δ 1 *P 30S And (ΔP) now /Δt)＞k 1 When the output power reported by the battery is linearly reduced to the continuous discharge power P according to the first preset speed, such as the speed of 10kW/s cont The method comprises the steps of carrying out a first treatment on the surface of the When P now ≥δ 1 *P 30S And (ΔP) now /Δt)≤k 1 When the output power reported by the battery is linearly reduced to the continuous discharge power P according to the second preset speed, such as 8kW/s cont 。
Wherein delta 1 0.8-0.85; k (k) 1 5-10kW/s.
Optionally, in one embodiment of the present application, determining an available maximum discharge power of a power battery of the vehicle according to a vehicle operation mode, and generating an optimal power output strategy of the power battery based on the available maximum discharge power includes: if the whole vehicle working mode is a cold start working mode, the optimal power output strategy is a strategy for keeping the available maximum discharge power of the cold start working mode for output.
In some embodiments, the embodiment of the application can be cold start in the whole vehicle working modeIn the working mode, the available maximum discharging power for keeping the cold starting working mode can be output by inquiring a preset power meter, for example, the power battery always keeps the 2S discharging power P 2S And outputting the output to the outside so as to meet the power requirement during starting.
Optionally, in one embodiment of the present application, determining an available maximum discharge power of a power battery of the vehicle according to a vehicle operation mode, and generating an optimal power output strategy of the power battery based on the available maximum discharge power includes: and if the whole vehicle working mode is a pure electric working mode, inquiring a preset power meter to obtain third available maximum discharge power and fourth available maximum discharge power of the pure electric working mode, wherein the third available maximum discharge power is larger than the fourth available maximum discharge power, and controlling a strategy of smoothly outputting the power battery based on the third available maximum discharge power and the fourth available maximum discharge power.
In other embodiments, the embodiment of the present application may query the preset power meter to obtain the third available maximum discharge power in the pure electric mode, i.e. the 5S discharge power P, when the whole vehicle operation mode is the pure electric mode 5S And a fourth available maximum discharge power, 10S discharge power P 10S . Wherein, 5S discharge power P 5S More than 10S discharge power P 10S 。
The embodiment of the application can be based on 5S discharge power P 5S And 10S discharge power P 10S And controlling the smooth output of the power battery.
Optionally, in one embodiment of the present application, a strategy for controlling smooth output of a power cell based on a third available maximum discharge power and a fourth available maximum discharge power includes: calculating a second product value of the current and the voltage output by the power battery; judging whether the second product value meets a preset second judging condition or not; and if the second product value meets a preset second judgment condition, controlling the power battery to reduce the available maximum discharge power from the third available maximum discharge power to the fourth available maximum discharge power according to a third preset speed, otherwise, controlling the power battery to reduce the maximum discharge power to the fourth available maximum discharge power according to the fourth preset speed, wherein the third preset speed is larger than the fourth preset speed.
Specifically, in the embodiment of the present application, the 5S discharge power P 5S And 10S discharge power P 10S Smooth switching between means that the power battery is first discharged at power P of 5S 5S The power is reported to the whole vehicle, and the power battery calculates the second product value P of the current and the voltage of the power output in real time now When P now ≥δ 2 *P 5S And (ΔP) now /Δt)＞k 2 When the output power reported by the battery is linearly reduced to 10S discharge power P according to a third preset speed, such as a speed of 6kW/S 10S The method comprises the steps of carrying out a first treatment on the surface of the When P now ≥δ 2 *P 5S And (ΔP) now /Δt)≤k 2 When the output power reported by the battery is linearly reduced to 10S discharge power P according to a fourth preset speed, such as a speed of 3kW/S 10S 。
Wherein delta 2 0.9-0.95; k (k) 2 10-15kW/s.
In step S103, the power cell output power is controlled based on the optimal power output strategy and the actual load power demand of the vehicle.
Furthermore, the embodiment of the application can control the output power of the power battery based on the optimal power output strategy and the actual load power requirement of the vehicle, so that the available maximum discharge power of the battery under different working conditions is greatly improved according to different power discharge methods of the battery corresponding to different working modes of the whole vehicle, the power performance of the whole vehicle is ensured, and the service life of the power battery is also maintained.
The operation principle of the power battery control method of the vehicle according to the embodiment of the application will be described in detail with reference to fig. 2.
As shown in fig. 2, an embodiment of the present application may include the steps of:
step S201: and acquiring the working modes of the whole vehicle, and switching the power battery into different discharging powers in real time according to different working modes.
Step S202: cold start mode. The embodiment of the application can ensure that the power battery is used for controlling the working mode of the whole vehicle to be a cold start working modeTemperature and SOC state table lookup to obtain 2S discharge power P 2S Reporting to the whole vehicle to maintain the available maximum discharge power of the cold start working mode for output, thereby meeting the power requirement during start.
Step S203: pure electric mode. The embodiment of the application can obtain the 5S discharge power P of the pure electric mode by looking up a table of the power battery according to the temperature and the SOC state when the whole electric mode is the pure electric mode 5S And 10S discharge power P 10S . Wherein, 5S discharge power P 5S More than 10S discharge power P 10S 。
Specifically, in the embodiment of the present application, the 5S discharge power P 5S And 10S discharge power P 10S Smooth switching between means that the power battery is first discharged at power P of 5S 5S The power is reported to the whole vehicle, and the power battery calculates the product value P of the current and the voltage of the power output in real time now When P now ≥δ 2 *P 5S And (ΔP) now /Δt)＞k 2 When the output power reported by the battery is linearly reduced to 10S discharge power P according to the speed of 6kW/S 10S The method comprises the steps of carrying out a first treatment on the surface of the When P now ≥δ 2 *P 5S And (ΔP) now /Δt)≤k 2 When the output power reported by the battery is linearly reduced to 10S discharge power P according to the speed of 3kW/S 10S 。
Wherein delta 2 0.9-0.95; k (k) 2 10-15kW/s.
Step S204: and (3) a mixing mode. The embodiment of the application can obtain 30S discharge power P by looking up a table of the power battery according to the temperature and the SOC state when the whole vehicle working mode is the mixed working mode 30S And sustained discharge power P cont Wherein, 30S discharge power P 30S Greater than the sustained discharge power P cont 。
Specifically, in the embodiment of the present application, the discharge power P is 30S 30S And sustained discharge power P cont Smooth switching between means that the power battery is first operated according to P 30S The power is reported to the whole vehicle, and the power battery calculates the product value P of the current and the voltage of the power output in real time now When P now ≥δ 1 *P 30S And (delta)P now /Δt)＞k 1 When the output power reported by the battery is linearly reduced to the continuous discharge power P according to the speed of 10kW/s cont The method comprises the steps of carrying out a first treatment on the surface of the When P now ≥δ 1 *P 30S And (ΔP) now /Δt)≤k 1 When the output power reported by the battery is linearly reduced to the continuous discharge power P according to the speed of 8kW/s cont 。
Wherein delta 1 0.8-0.85; k (k) 1 5-10kW/s.
According to the power battery control method of the vehicle, provided by the embodiment of the application, the available maximum discharge power of the power battery of the corresponding vehicle can be determined according to different working modes of the whole vehicle, so that the optimal power output strategy of the power battery is generated based on the available maximum discharge power, the output power of the power battery is controlled based on the optimal power output strategy and the actual load power requirement of the vehicle, the available maximum discharge power of the battery under different working conditions is greatly improved, the power performance of the whole vehicle is ensured, and the service life of the power battery is prolonged. Therefore, the technical problems that in the related art, the discharging capability of the battery is difficult to fully release due to the fact that the power composition of the hybrid electric vehicle type is different in different working modes in the related art are solved, and the service life of the battery is shortened are solved.
Next, a power battery control device of a vehicle according to an embodiment of the present application will be described with reference to the accompanying drawings.
Fig. 3 is a block diagram schematically illustrating a power battery control apparatus of a vehicle according to an embodiment of the present application.
As shown in fig. 3, the power battery control device 10 of the vehicle includes: an identification module 100, a generation module 200 and a control module 300.
Specifically, the identifying module 100 is configured to identify a current vehicle operation mode of the vehicle.
The generating module 200 is configured to determine an available maximum discharge power of a power battery of the vehicle according to a vehicle operation mode, and generate an optimal power output strategy of the power battery based on the available maximum discharge power.
A control module 300 for controlling the power cell output power based on the optimal power output strategy and the actual load power demand of the vehicle.
Optionally, in one embodiment of the present application, the identification module 100 includes: a first acquisition unit and a determination unit.
The first acquisition unit is used for acquiring power source state information of the vehicle.
The determining unit is used for determining the current whole vehicle working mode of the vehicle according to the power source state information, wherein the current whole vehicle working mode is a hybrid working mode, a cold start working mode or a pure electric working mode.
Optionally, in one embodiment of the present application, the generating module 200 includes: and a second acquisition unit.
The second obtaining unit is used for inquiring a preset power meter when the whole vehicle working mode is a hybrid working mode to obtain a first available maximum discharge power and a second available maximum discharge power of the hybrid working mode, wherein the first available maximum discharge power is larger than the second available maximum discharge power, and a strategy for controlling smooth output of the power battery based on the first available maximum discharge power and the second available maximum discharge power.
Optionally, in one embodiment of the present application, the second acquisition unit includes: the first computing subunit, the first judging subunit and the first control subunit.
The first calculating subunit is used for calculating a first product value of the current and the voltage output by the power battery.
And the first judging subunit is used for judging whether the first product value meets a preset first judging condition.
And the first control subunit is used for controlling the power battery to reduce the available maximum discharge power from the first available maximum discharge power to the second available maximum discharge power according to a first preset speed when the first product value meets a preset first judgment condition, otherwise controlling the power battery to reduce the maximum discharge power to the second available maximum discharge power according to a second preset speed, wherein the first preset speed is larger than the second preset speed.
Optionally, in an embodiment of the present application, the generating module 200 is further configured to, when the vehicle operating mode is a cold start operating mode, output the maximum available maximum discharge power for maintaining the cold start operating mode.
Optionally, in one embodiment of the present application, the generating module 200 includes: and a second acquisition unit.
The second obtaining unit is configured to query a preset power meter when the vehicle operation mode is a pure electric operation mode, and obtain a third available maximum discharge power and a fourth available maximum discharge power of the pure electric operation mode, where the third available maximum discharge power is greater than the fourth available maximum discharge power, and control a strategy of smooth output of the power battery based on the third available maximum discharge power and the fourth available maximum discharge power.
Optionally, in one embodiment of the present application, the second acquisition unit includes: the second calculating subunit, the second judging subunit and the second control subunit.
And the second calculating subunit is used for calculating a second product value of the current and the voltage output by the power battery.
And the second judging subunit is used for judging whether the second product value meets a preset second judging condition.
And the second control subunit is used for controlling the power battery to reduce the available maximum discharge power from the third available maximum discharge power to the fourth available maximum discharge power according to a third preset speed when the second product value meets a preset second judging condition, otherwise controlling the power battery to reduce the maximum discharge power to the fourth available maximum discharge power according to the fourth preset speed, wherein the third preset speed is larger than the fourth preset speed.
It should be noted that the foregoing explanation of the embodiment of the power battery control method of the vehicle is also applicable to the power battery control device of the vehicle of this embodiment, and will not be repeated here.
According to the power battery control device of the vehicle, provided by the embodiment of the application, the available maximum discharge power of the power battery of the corresponding vehicle can be determined according to different working modes of the whole vehicle, so that the optimal power output strategy of the power battery is generated based on the available maximum discharge power, the output power of the power battery is controlled based on the optimal power output strategy and the actual load power requirement of the vehicle, the available maximum discharge power of the battery under different working conditions is greatly improved, the power performance of the whole vehicle is ensured, and the service life of the power battery is prolonged. Therefore, the technical problems that in the related art, the discharging capability of the battery is difficult to fully release due to the fact that the power composition of the hybrid electric vehicle type is different in different working modes in the related art are solved, and the service life of the battery is shortened are solved.
Fig. 4 is a schematic structural diagram of a vehicle according to an embodiment of the present application. The vehicle may include:
memory 401, processor 402, and a computer program stored on memory 401 and executable on processor 402.
The processor 402 implements the power battery control method of the vehicle provided in the above-described embodiment when executing a program.
Further, the vehicle further includes:
a communication interface 403 for communication between the memory 401 and the processor 402.
A memory 401 for storing a computer program executable on the processor 402.
Memory 401 may comprise high-speed RAM memory or may also include non-volatile memory (non-volatile memory), such as at least one disk memory.
If the memory 401, the processor 402, and the communication interface 403 are implemented independently, the communication interface 403, the memory 401, and the processor 402 may be connected to each other by a bus and perform communication with each other. The bus may be an industry standard architecture (Industry Standard Architecture, abbreviated ISA) bus, an external device interconnect (Peripheral Component, abbreviated PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, abbreviated EISA) bus, among others. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in fig. 4, but not only one bus or one type of bus.
Alternatively, in a specific implementation, if the memory 401, the processor 402, and the communication interface 403 are integrated on a chip, the memory 401, the processor 402, and the communication interface 403 may complete communication with each other through internal interfaces.
The processor 402 may be a central processing unit (Central Processing Unit, abbreviated as CPU) or an application specific integrated circuit (Application Specific Integrated Circuit, abbreviated as ASIC) or one or more integrated circuits configured to implement embodiments of the present application.
The present embodiment also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the power battery control method of a vehicle as above.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, for example, two, three, etc., unless specifically defined otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or N wires, a portable computer cartridge (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (10)

1. A power battery control method of a vehicle, characterized by comprising the steps of:
identifying a current whole vehicle working mode of the vehicle;
determining available maximum discharge power of a power battery of the vehicle according to the whole vehicle working mode, and generating an optimal power output strategy of the power battery based on the available maximum discharge power; and
the power battery output power is controlled based on the optimal power output strategy and an actual load power demand of the vehicle.
2. The method of claim 1, wherein the identifying the current vehicle mode of operation of the vehicle comprises:
acquiring power source state information of the vehicle;
and determining a current whole vehicle working mode of the vehicle according to the power source state information, wherein the current whole vehicle working mode is a hybrid working mode, a cold start working mode or a pure electric working mode.
3. The method of claim 2, wherein the determining an available maximum discharge power of a power battery of the vehicle according to the vehicle operating mode and generating an optimal power output strategy of the power battery based on the available maximum discharge power comprises:
and if the whole vehicle working mode is the hybrid working mode, inquiring a preset power meter to obtain a first available maximum discharge power and a second available maximum discharge power of the hybrid working mode, wherein the first available maximum discharge power is larger than the second available maximum discharge power, and controlling a strategy of smooth output of the power battery based on the first available maximum discharge power and the second available maximum discharge power.
4. The method of claim 3, wherein the strategy for controlling the smooth output of the power cell based on the first available maximum discharge power and the second available maximum discharge power comprises:
calculating a first product value of the current and the voltage output by the power battery;
judging whether the first product value meets a preset first judging condition or not;
and if the first product value meets the preset first judgment condition, controlling the power battery to reduce the available maximum discharge power from the first available maximum discharge power to the second available maximum discharge power according to a first preset speed, otherwise, controlling the power battery to reduce the maximum discharge power to the second available maximum discharge power according to a second preset speed, wherein the first preset speed is larger than the second preset speed.
5. The method of claim 2, wherein the determining an available maximum discharge power of a power battery of the vehicle according to the vehicle operating mode and generating an optimal power output strategy of the power battery based on the available maximum discharge power comprises:
and if the whole vehicle working mode is the cold start working mode, the optimal power output strategy is a strategy for keeping the maximum available discharge power of the cold start working mode for output.
6. The method of claim 2, wherein the determining an available maximum discharge power of a power battery of the vehicle according to the vehicle operating mode and generating an optimal power output strategy of the power battery based on the available maximum discharge power comprises:
and if the whole vehicle working mode is the pure electric working mode, inquiring a preset power meter to obtain third available maximum discharge power and fourth available maximum discharge power of the pure electric working mode, wherein the third available maximum discharge power is larger than the fourth available maximum discharge power, and controlling a strategy of smooth output of the power battery based on the third available maximum discharge power and the fourth available maximum discharge power.
7. The method of claim 6, wherein the strategy for controlling the smooth output of the power cell based on the third available maximum discharge power and the fourth available maximum discharge power comprises:
calculating a second product value of the current and the voltage output by the power battery;
judging whether the second product value meets a preset second judging condition or not;
and if the second product value meets the preset second judging condition, controlling the power battery to reduce the available maximum discharge power from the third available maximum discharge power to the fourth available maximum discharge power according to a third preset speed, otherwise, controlling the power battery to reduce the maximum discharge power to the fourth available maximum discharge power according to a fourth preset speed, wherein the third preset speed is larger than the fourth preset speed.
8. A power battery control device of a vehicle, characterized by comprising:
the identification module is used for identifying the current whole vehicle working mode of the vehicle;
the generation module is used for determining the available maximum discharge power of the power battery of the vehicle according to the whole vehicle working mode and generating the optimal power output strategy of the power battery based on the available maximum discharge power; and
a control module for controlling the power battery output power based on the optimal power output strategy and an actual load power demand of the vehicle.
9. A vehicle, characterized by comprising: the power battery control device of a vehicle according to claim 8.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed, implements the power battery control method of the vehicle according to any one of claims 1 to 7.
CN202310624130.1A 2023-05-29 2023-05-29 Vehicle power battery control method and device, vehicle and storage medium Pending CN116572927A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116885320A (en) * 2023-09-08 2023-10-13 宁德时代新能源科技股份有限公司 Battery power output method, device, equipment, medium and product

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116885320A (en) * 2023-09-08 2023-10-13 宁德时代新能源科技股份有限公司 Battery power output method, device, equipment, medium and product
CN116885320B (en) * 2023-09-08 2024-03-15 宁德时代新能源科技股份有限公司 Battery power output method, device, equipment and medium

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