CN113386631A - Power battery heat management method, vehicle control unit, hydrogen energy vehicle and storage medium - Google Patents
Power battery heat management method, vehicle control unit, hydrogen energy vehicle and storage medium Download PDFInfo
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- CN113386631A CN113386631A CN202110678066.6A CN202110678066A CN113386631A CN 113386631 A CN113386631 A CN 113386631A CN 202110678066 A CN202110678066 A CN 202110678066A CN 113386631 A CN113386631 A CN 113386631A
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- 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
- B60L58/40—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
- B60R16/0232—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04029—Heat exchange using liquids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04701—Temperature
- H01M8/04723—Temperature of the coolant
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04992—Processes for controlling fuel cells or fuel cell systems characterised by the implementation of mathematical or computational algorithms, e.g. feedback control loops, fuzzy logic, neural networks or artificial intelligence
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- 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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Abstract
The invention provides a power battery heat management method, a vehicle controller, a hydrogen energy vehicle and a storage medium, wherein the vehicle controller performs initialization control on a battery heat management controller, clears a timer and controls the mode of the battery heat management controller to be a shutdown mode; judging whether the vehicle is charging, if so, controlling the mode of the battery thermal management controller to be an external vehicle charging mode by the vehicle controller; and judging whether the vehicle is in a ready state, and if the vehicle is in the ready state, controlling the mode of the battery thermal management controller to be a vehicle driving mode by the vehicle controller. The technical scheme provided by the invention has the beneficial effects that: the vehicle control unit can accurately judge the current charging or driving state of the vehicle, the vehicle control unit is used for controlling the corresponding operation mode of the battery thermal management controller according to the current state of the vehicle, the battery thermal management controller controls the circulating pump, the refrigerator and the like to work, the temperature of the power battery is controlled, and the stable and efficient work of the power battery is guaranteed.
Description
Technical Field
The invention relates to the technical field of hydrogen energy automobiles, in particular to a power battery heat management method, a vehicle control unit, a hydrogen energy automobile and a storage medium.
Background
The hydrogen energy automobile, especially the hydrogen fuel cell heavy truck, has obvious temperature change when charging and discharging with high power, and the charging and discharging power of the power battery is affected by overhigh and overlow temperature, so that the hydrogen energy automobile needs to be subjected to fine heat management in order to ensure the stable and efficient work.
In the related art, although the power battery heat control method determines whether to perform heat control on the power battery based on the temperature of the power battery, the control method is only simple on-off control, that is: when the temperature of the power battery exceeds a certain set value, the thermal control system heats or cools the power battery, the control mode is single, and the thermal control requirements of the power battery in different temperature intervals cannot be met.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a power battery thermal management method, a vehicle control unit, a hydrogen energy vehicle, and a storage medium.
The embodiment of the invention provides a power battery thermal management method, which comprises the following steps:
s1, the vehicle controller performs initialization control on the battery thermal management controller, clears the timer, and controls the mode of the battery thermal management controller to be a shutdown mode;
s2, judging whether the vehicle is charging, if so, controlling the mode of the battery thermal management controller to be an external charging mode of the vehicle by the vehicle controller;
and S3, judging whether the vehicle is in a ready state, and if the vehicle is in the ready state, controlling the mode of the battery thermal management controller to be a vehicle driving mode by the vehicle controller.
Further, the mode of the battery thermal management controller in step S2 is an external vehicle charging mode, and the mode of the battery thermal management controller in step S3 is a vehicle driving mode, and the method includes the following steps:
s4, acquiring the highest temperature of the power battery monomer fed back to the whole vehicle controller by the power battery manager;
s5, if the highest temperature of the power battery monomer is larger than or equal to a first preset temperature threshold value;
s6, controlling the mode of the battery thermal management controller to be a self-circulation mode;
and S7, if the highest temperature of the power battery monomer is greater than or equal to a second preset temperature threshold which is greater than the first preset temperature threshold, controlling the mode of the battery thermal management controller to be a refrigeration mode, and controlling the refrigeration target temperature of the battery thermal management controller to be a preset target temperature.
Further, step S7 is followed by: and S8, controlling the battery thermal management controller to start timing by the timer when the battery thermal management controller enters the cooling mode, clearing the timer after the preset time is up, and returning to the step S6.
Further, step S7 is followed by: s9, if the highest temperature of the power battery monomer is less than or equal to the third preset temperature threshold, the second preset temperature threshold > the third preset temperature threshold > the first preset temperature threshold, returning to the step S6.
Further, step S9 is followed by: s10, if the highest temperature of the power battery monomer is less than or equal to a fourth preset temperature threshold, the first preset temperature threshold is greater than the fourth preset temperature threshold, and the step returns to the step S1.
Further, step S2 is followed by: s11, judging whether the vehicle quits charging; if the vehicle exits charging, the process returns to step S1.
Further, step S3 is followed by: s12 judges if the vehicle is in the process of high voltage, if the fuel cell system sends permission, if so, the fuel cell system sends permission to return to S1.
The embodiment of the invention also provides a vehicle control unit which comprises a memory, a processor and a power battery thermal management program stored on the memory and capable of running on the processor, wherein the power battery thermal management program is executed by the processor, and the steps of the power battery thermal management method which can be realized by the electric vehicle can be realized by the processor.
The embodiment of the invention provides a hydrogen energy automobile, which comprises a vehicle control unit, a fuel cell system controller, a fuel cell system, a power cell manager, a power cell and a battery thermal management controller, wherein the vehicle control unit, the fuel cell system controller, the fuel cell system, the power cell manager, the power cell and the battery thermal management controller are arranged on the vehicle control unit; the whole vehicle controller is electrically connected with the fuel cell system controller, the whole vehicle controller controls the fuel cell system to start and shut down and sets the target power of the fuel cell system through hard wire or CAN communication, the fuel cell system controller controls the fuel cell system, and the fuel cell system feeds back high-voltage low-voltage permission to the whole vehicle controller through the CAN; the vehicle control unit is electrically connected with the power battery manager, the vehicle control unit controls a contactor of the power battery manager to be closed and opened, the power battery manager feeds back the highest temperature and charging information of a power battery monomer to the vehicle control unit, and the power battery manager controls the power battery; the whole vehicle controller is electrically connected with the battery thermal management controller, the whole vehicle controller sets the working mode and the control temperature of the battery thermal management controller through the CAN, the battery thermal management controller feeds back the working mode, the fault state and the water inlet and outlet temperature information to the whole vehicle controller, and the battery thermal management controller controls the battery thermal management system.
An embodiment of the present invention provides a storage medium, on which a power battery thermal management program is stored, which when executed implements the steps of the power battery thermal management method as described above.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: the vehicle control unit is a brain of a hydrogen energy vehicle and has the main functions of carrying out vehicle power-on and power-off control, torque control and energy management, the vehicle control unit receives state information of all parts of a power system, can accurately judge the current charging or driving state of the vehicle, controls the corresponding operation mode of the battery heat management controller by using the vehicle control unit according to the current state of the vehicle, and the battery heat management controller is responsible for executing the control mode and temperature control instructions of the vehicle control unit and controlling the operation of a circulating pump, a refrigerator and the like in the battery heat management system, so that the temperature of the power battery is controlled, and the stable and efficient operation of the power battery is ensured. The whole vehicle controller is used as a main controller for the heat management of the power battery of the hydrogen energy vehicle, and the whole vehicle controller is only required to modify a program, so that the hydrogen energy vehicle is beneficial to moving towards the integration direction.
Drawings
FIG. 1 is a schematic connection diagram of a vehicle controller, a fuel cell system, a power battery manager, a power battery, a battery thermal management controller and a battery thermal management system in a hydrogen energy vehicle;
FIG. 2 is a schematic flow chart illustrating an embodiment of a method for thermal management of a power battery according to the present invention;
FIG. 3 is a schematic flow diagram of a vehicle offboard charging mode of the battery thermal management controller of FIG. 2;
fig. 4 is a flow chart of a vehicle driving mode of the battery thermal management controller of fig. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, in a hydrogen energy vehicle, a vehicle controller is electrically connected to a fuel cell system controller, the vehicle controller controls the fuel cell system to start and shut down and set a target power of the fuel cell system through a hard-wire or CAN communication, the fuel cell system controller controls the fuel cell system, and the fuel cell system feeds back a high-voltage low-voltage power permission to the vehicle controller through the CAN. The vehicle control unit is electrically connected with the power battery manager, the vehicle control unit controls a contactor of the power battery manager to be closed and disconnected, the power battery manager feeds back the highest temperature and charging information of the power battery monomer to the vehicle control unit, and the power battery manager controls the power battery. The whole vehicle controller is electrically connected with the battery thermal management controller, the whole vehicle controller sets a working mode and a control temperature of the battery thermal management controller through the CAN, the battery thermal management controller feeds back information such as the working mode, a fault state and the temperature of inlet and outlet water to the whole vehicle controller, the battery thermal management controller controls the battery thermal management system, and the battery thermal management system comprises a refrigerator, a circulating pump, a fan and a condenser. The power battery and the battery thermal management system are connected through a cooling pipeline, and the fuel battery system controller, the power battery manager and the battery thermal management controller are electrically connected with a power supply (12V low-voltage storage battery).
Referring to fig. 2 to 4, an embodiment of the invention provides a power battery thermal management method, including the following steps:
s1 the whole vehicle controller performs initialization control on the battery thermal management controller, clears the timer, controls the mode of the battery thermal management controller to be a shutdown mode, controls the refrigeration target temperature of the battery thermal management controller to be an initial target temperature, and controls the initial target temperature to be 15 ℃.
And S2, judging whether the vehicle is charging according to the charging information fed back by the power battery manager, and if the vehicle is charging, controlling the mode of the battery thermal management controller to be an external vehicle charging mode by the vehicle controller. Step S2 is followed by: and S11, judging whether the vehicle quits charging or not according to the charging information fed back by the power battery manager, and returning to the step S1 if the vehicle quits charging.
And S3, judging whether the vehicle is in a ready state, and if the vehicle is in the ready state, controlling the mode of the battery thermal management controller to be a vehicle driving mode by the vehicle controller. Step S3 is followed by: s12 judges if the vehicle is in the process of high voltage, if the fuel cell system sends permission, if so, the fuel cell system sends permission to return to S1.
The vehicle control unit is a brain of a hydrogen energy vehicle and has the main functions of carrying out vehicle power-on and power-off control, torque control and energy management, the vehicle control unit receives state information of all parts of a power system, can accurately judge the current charging or driving state of the vehicle, controls the corresponding operation mode of the battery heat management controller by using the vehicle control unit according to the current state of the vehicle, and the battery heat management controller is responsible for executing the control mode and temperature control instructions of the vehicle control unit and controlling the operation of a circulating pump, a refrigerator and the like in the battery heat management system, so that the temperature of the power battery is controlled, and the stable and efficient operation of the power battery is ensured. The whole vehicle controller is used as a main controller for the heat management of the power battery of the hydrogen energy vehicle, and the whole vehicle controller is only required to modify a program, so that the hydrogen energy vehicle is beneficial to moving towards the integration direction.
Specifically, the mode of the battery thermal management controller in step S2 is an external charging mode of the vehicle, and includes the following steps:
s4, acquiring the highest temperature of the power battery monomer fed back to the whole vehicle controller by the power battery manager;
s5 if the maximum temperature of the power battery cell is greater than or equal to the first preset temperature threshold a1,
s6, controlling the mode of the battery thermal management controller to be a self-circulation mode, wherein only a water pump works in a cooling unit of the battery thermal management controller when the battery thermal management controller is in the self-circulation mode, and the water pump drives cooling liquid to circulate to take away heat;
s7, if the highest temperature of the power battery monomer is larger than or equal to a second preset temperature threshold a2, the second preset temperature threshold a2 is larger than a first preset temperature threshold a1, the mode of the battery thermal management controller is controlled to be a refrigeration mode, the refrigeration target temperature of the battery thermal management controller is controlled to be a preset target temperature x1, in the refrigeration mode, the water pump works, and the refrigeration unit also works, so that the cooling liquid temperature drop speed is higher. In the present embodiment, the first preset temperature threshold a1 is set to 32 ℃, the second preset temperature threshold a2 is set to 36 ℃, and the preset target temperature x1 is 15 ℃.
Further, step S7 is followed by: and S8, controlling the battery thermal management controller to enter a cooling mode, starting timing by the timer, clearing the timer after the preset time is up, and returning to the step S6 to control the mode of the battery thermal management controller to be a self-circulation mode. After continuously refrigerating for n hours, the vehicle controller controls the battery thermal management controller to jump to a self-circulation mode from a refrigerating mode, and if the temperature sensor has no fault, the temperature rises and enters the refrigerating mode again.
Further, step S7 is followed by: s9, if the maximum temperature of the power battery cell is less than or equal to the third preset temperature threshold a3, the second preset temperature threshold a2> the third preset temperature threshold a3> the first preset temperature threshold a1, returning to step S6 to control the battery thermal management controller to be in the self-circulation mode, in this embodiment, the third preset temperature threshold a3 is set to 33 ℃.
Step S9 is followed by: s10, if the maximum temperature of the power battery cell is less than or equal to a fourth preset temperature threshold a4, the first preset temperature threshold a1 is greater than the fourth preset temperature threshold a4, returning to step S1, and controlling the mode of the battery thermal management controller to be the shutdown mode.
Specifically, the mode of the battery thermal management controller in step S3 is a vehicle driving mode, and the method includes the following steps:
s4, acquiring the highest temperature of the power battery monomer fed back to the whole vehicle controller by the power battery manager;
s5, if the highest temperature of the power battery cells is greater than or equal to the first preset temperature threshold b1,
s6, controlling the mode of the battery thermal management controller to be a self-circulation mode, wherein only a water pump works in a cooling unit of the battery thermal management controller when the battery thermal management controller is in the self-circulation mode, and the water pump drives cooling liquid to circulate to take away heat;
s7, if the highest temperature of the power battery monomer is greater than or equal to a second preset temperature threshold b2, the second preset temperature threshold b2 is greater than a first preset temperature threshold b1, controlling the mode of the battery thermal management controller to be a refrigeration mode, controlling the refrigeration target temperature of the battery thermal management controller to be a preset target temperature x2, and during the refrigeration mode, operating the water pump and the refrigeration unit to enable the cooling liquid temperature to drop faster. In the present embodiment, the first preset temperature threshold b1 is set to 32 ℃, the second preset temperature threshold b2 is set to 36 ℃, and the preset target temperature x2 is 15 ℃.
Further, step S7 is followed by: and S8, controlling the battery thermal management controller to enter a cooling mode, starting timing by the timer, clearing the timer after the preset time is up, and returning to the step S6 to control the mode of the battery thermal management controller to be a self-circulation mode.
Further, step S7 is followed by: s9, if the maximum temperature of the power battery cell is less than or equal to the seventh preset temperature threshold b3, the second preset temperature threshold b2> the third preset temperature threshold b3> the first preset temperature threshold b1, returning to step S6 to control the battery thermal management controller to be in the self-circulation mode, in this embodiment, the seventh preset temperature threshold b3 is set to 33 ℃.
Step S9 is followed by: s10, if the maximum temperature of the power battery cell is less than or equal to the fourth preset temperature threshold b4, the first preset temperature threshold b1 is greater than the fourth preset temperature threshold b4, returning to step S1, and controlling the mode of the battery thermal management controller to be the shutdown mode.
The preset temperature thresholds a1, a2, a3, a4, b1, b2, b3 and b4 are calibrated quantities of the whole vehicle controller, online calibration can be performed according to the temperature range requirement of the power battery, and generally the values of the preset temperature thresholds need to follow the following steps: a2> a3> a1> a4, b2> b3> b1> b 4. The preset target temperature x1 and the preset target temperature x2 of the refrigeration mode of the battery thermal management controller are calibration quantities, and can be calibrated and modified on line according to actual work or experimental conditions. The method comprises the steps of starting a self-circulation mode after the highest temperature of a power battery monomer reaches a first preset temperature threshold, starting a refrigeration mode after the highest temperature of the power battery monomer reaches a second preset temperature threshold, adjusting to the self-circulation mode after the highest temperature of the power battery monomer is cooled to a third preset temperature threshold, adjusting to the self-circulation mode after the highest temperature of the power battery monomer is cooled to a fourth preset temperature threshold, adjusting a battery thermal management controller to a shutdown mode after the highest temperature of a power battery Dane is reduced to the fourth preset temperature threshold, and controlling the operation mode of a battery thermal management controller by monitoring the highest temperature of the power battery monomer, so that the operation of a circulating pump, a refrigerator and the like in a battery thermal management system can be controlled, the temperature of the power battery is accurately controlled, and stable and efficient operation of the power battery is guaranteed.
The embodiment of the invention also provides a vehicle control unit which comprises a memory, a processor and a power battery thermal management program stored on the memory and capable of running on the processor, wherein the power battery thermal management program is executed by the processor, and the steps of the power battery thermal management method which can be realized by the electric vehicle can be realized by the processor.
The embodiment of the invention provides a hydrogen energy automobile which comprises the vehicle control unit, a fuel cell system controller, a fuel cell system, a power cell manager, a power cell and a battery thermal management controller.
An embodiment of the present invention provides a storage medium, on which a power battery thermal management program is stored, which when executed implements the steps of the power battery thermal management method as described above.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The power battery thermal management method is characterized by comprising the following steps:
s1, the vehicle controller performs initialization control on the battery thermal management controller, clears the timer, and controls the mode of the battery thermal management controller to be a shutdown mode;
s2, judging whether the vehicle is charging, if so, controlling the mode of the battery thermal management controller to be an external charging mode of the vehicle by the vehicle controller;
and S3, judging whether the vehicle is in a ready state, and if the vehicle is in the ready state, controlling the mode of the battery thermal management controller to be a vehicle driving mode by the vehicle controller.
2. The method for managing the heat of the power battery according to claim 1, wherein the mode of the battery heat management controller in step S2 is an external vehicle charging mode, and the mode of the battery heat management controller in step S3 is a vehicle driving mode, and the method comprises the following steps:
s4, acquiring the highest temperature of the power battery monomer fed back to the whole vehicle controller by the power battery manager;
s5, if the highest temperature of the power battery monomer is larger than or equal to a first preset temperature threshold value;
s6, controlling the mode of the battery thermal management controller to be a self-circulation mode;
and S7, if the highest temperature of the power battery monomer is greater than or equal to a second preset temperature threshold which is greater than the first preset temperature threshold, controlling the mode of the battery thermal management controller to be a refrigeration mode, and controlling the refrigeration target temperature of the battery thermal management controller to be a preset target temperature.
3. The power battery thermal management method according to claim 2, wherein step S7 is followed by further comprising: and S8, controlling the battery thermal management controller to start timing by the timer when the battery thermal management controller enters the cooling mode, clearing the timer after the preset time is up, and returning to the step S6.
4. The power battery thermal management method according to claim 2, wherein step S7 is followed by further comprising: s9, if the highest temperature of the power battery monomer is less than or equal to the third preset temperature threshold, the second preset temperature threshold > the third preset temperature threshold > the first preset temperature threshold, returning to the step S6.
5. The power battery thermal management method according to claim 4, wherein step S9 is followed by further comprising: s10, if the highest temperature of the power battery monomer is less than or equal to a fourth preset temperature threshold, the first preset temperature threshold is greater than the fourth preset temperature threshold, and the step returns to the step S1.
6. The power battery thermal management method according to claim 1, further comprising, after step S2: s11, judging whether the vehicle quits charging; if the vehicle exits charging, the process returns to step S1.
7. The power battery thermal management method according to claim 1, further comprising, after step S3: s12 judges if the vehicle is in the process of high voltage, if the fuel cell system sends permission, if so, the fuel cell system sends permission to return to S1.
8. A vehicle control unit, comprising a memory, a processor and a power battery thermal management program stored on the memory and executable on the processor, wherein the processor executes the steps of the method for realizing the thermal management of the power battery of the electric vehicle according to any one of claims 1 to 7.
9. A hydrogen energy automobile, comprising the vehicle control unit, the fuel cell system controller, the fuel cell system, the power cell manager, the power cell, and the battery thermal management controller according to claim 8; the whole vehicle controller is electrically connected with the fuel cell system controller, the whole vehicle controller controls the fuel cell system to start and shut down and sets the target power of the fuel cell system through hard wire or CAN communication, the fuel cell system controller controls the fuel cell system, and the fuel cell system feeds back high-voltage low-voltage permission to the whole vehicle controller through the CAN; the vehicle control unit is electrically connected with the power battery manager, the vehicle control unit controls a contactor of the power battery manager to be closed and opened, the power battery manager feeds back the highest temperature and charging information of a power battery monomer to the vehicle control unit, and the power battery manager controls the power battery; the whole vehicle controller is electrically connected with the battery thermal management controller, the whole vehicle controller sets the working mode and the control temperature of the battery thermal management controller through the CAN, the battery thermal management controller feeds back the working mode, the fault state and the water inlet and outlet temperature information to the whole vehicle controller, and the battery thermal management controller controls the battery thermal management system.
10. A storage medium having stored thereon a power cell thermal management program that, when executed, performs the steps of the power cell thermal management method according to any one of claims 1 to 7.
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| CN102358285A (en) * | 2011-08-19 | 2012-02-22 | 北京汽车新能源汽车有限公司 | Range-extending electric vehicle control system and method |
| CN103612570A (en) * | 2013-09-04 | 2014-03-05 | 奇瑞汽车股份有限公司 | Pure electric vehicle thermal management control system and control method thereof |
| CN111497672A (en) * | 2019-01-30 | 2020-08-07 | 北京新能源汽车股份有限公司 | Control method and device for vehicle charging thermal management |
| CN110525232A (en) * | 2019-09-04 | 2019-12-03 | 天津易鼎丰动力科技有限公司 | A kind of dynamical system domain controller for electric vehicle and its control method |
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