CN115189072A - Heating control method and device for power battery and storage medium - Google Patents

Heating control method and device for power battery and storage medium Download PDF

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Publication number
CN115189072A
CN115189072A CN202110359667.0A CN202110359667A CN115189072A CN 115189072 A CN115189072 A CN 115189072A CN 202110359667 A CN202110359667 A CN 202110359667A CN 115189072 A CN115189072 A CN 115189072A
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Prior art keywords
heating
power battery
power
current
cooling liquid
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Inventor
孔宁华
胡福胜
朱林培
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GAC Aion New Energy Automobile Co Ltd
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GAC Aion New Energy Automobile Co Ltd
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Priority to CN202110359667.0A priority Critical patent/CN115189072A/en
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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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
    • 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
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a heating control method, a heating control device and a storage medium of a power battery, wherein the method comprises the following steps: when the heating starting condition of the power battery is met, controlling a water pump and a heater of a liquid cooling system of the power battery to start; when the heating power adjusting condition is met, acquiring current cooling liquid state parameters in the liquid cooling system, determining current target heating power of the heater according to the current cooling liquid state parameters, and adjusting the heating power of the heater according to the current target heating power; and the current cooling liquid state parameters comprise the current cooling liquid flow and the current cooling liquid inlet and outlet water temperature difference. By adopting the embodiment of the invention, the heating power of the heater can be accurately controlled, so that the power battery can be heated with low consumption and high efficiency.

Description

Heating control method and device for power battery and storage medium
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a heating control method and device of a power battery and a storage medium.
Background
The technology of the new energy electric automobile is rapidly developed, the power battery is used as one of the core parts of the new energy electric automobile, and the thermal management performance of the power battery influences the performance, the service life and the durability of the whole automobile. Because the discharging capacity and the charging capacity of the battery are limited under the low-temperature working condition, the power battery is generally heated by the aid of a liquid cooling system, and therefore the temperature of the battery is controlled within a proper working temperature range. However, the inventor finds that the following technical problems exist in the prior art in the process of implementing the invention: in the heating process, the heating power adopted by the heater is generally preset, and the actual operation state of the liquid cooling system is not considered, so that the problem that the heating power is not matched with the actual heating requirement easily occurs, and the heating is slow or the energy consumption is overlarge is caused.
Disclosure of Invention
Embodiments of the present invention provide a method and an apparatus for controlling heating of a power battery, and a storage medium, which can accurately control heating power of a heater, thereby achieving heating of the power battery with low power consumption and high efficiency.
An embodiment of the present invention provides a heating control method for a power battery, including:
when the heating starting condition of the power battery is met, controlling a water pump and a heater of a liquid cooling system of the power battery to start;
when the heating power adjusting condition is met, acquiring current cooling liquid state parameters in the liquid cooling system, determining current target heating power of the heater according to the current cooling liquid state parameters, and adjusting the heating power of the heater according to the current target heating power; and the current cooling liquid state parameters comprise the current cooling liquid flow and the current cooling liquid inlet and outlet water temperature difference.
As an improvement of the above scheme, when the power battery heating start condition is satisfied, the water pump and the heater of the liquid cooling system are controlled to start, specifically:
and when the heating starting condition of the power battery is met, controlling a water pump of the liquid cooling system to start, and controlling the heater to start to work at a preset maximum heating power.
As an improvement of the above, the method further comprises the steps of:
when the heating stop condition of the power battery is met, controlling the heater to stop working;
and after the heater is controlled to stop working, if the condition that the water pump stops running is judged to be met, controlling the water pump to stop running.
As an improvement of the above scheme, the heating start condition of the power battery is specifically as follows:
the current lowest temperature of the power battery is smaller than a first preset temperature value;
the power battery heating stop conditions are as follows:
the current lowest temperature of the power battery is greater than a second preset temperature value;
the first preset temperature value is smaller than the second preset temperature value;
the water pump stop operation conditions are as follows:
and the difference between the current cooling liquid inlet temperature in the liquid cooling system and the current lowest temperature of the power battery is smaller than a third preset temperature value.
As an improvement of the above scheme, the heating power adjustment conditions are specifically:
and the inlet water temperature of the current cooling liquid in the liquid cooling system reaches a target cooling liquid temperature value.
As an improvement of the above scheme, when the current lowest temperature of the power battery is less than a fourth preset temperature value, the target coolant temperature value is equal to a fifth preset temperature value;
when the current lowest temperature of the power battery is greater than or equal to the fourth preset temperature value, the target cooling liquid temperature value is equal to a sixth preset temperature value;
wherein the fifth preset temperature value is greater than the sixth preset temperature value.
As an improvement of the above scheme, the adjusting the heating power of the heater according to the current target heating power specifically includes:
and adjusting the heating power of the heater to be the sum of the current target heating power and preset compensation power.
Another embodiment of the present invention correspondingly provides a heating control device for a power battery, including:
the heating starting module is used for controlling the starting of a water pump and a heater of a liquid cooling system of the power battery when the heating starting condition of the power battery is met;
the power adjusting module is used for acquiring current cooling liquid state parameters in the liquid cooling system when heating power adjusting conditions are met, determining current target heating power of the heater according to the current cooling liquid state parameters, and adjusting the heating power of the heater according to the current target heating power; and the current cooling liquid state parameters comprise the current cooling liquid flow and the current cooling liquid inlet and outlet water temperature difference.
Another embodiment of the present invention correspondingly provides a heating control device for a power battery, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, the heating control device implements the heating control method for the power battery as described in any one of the above.
Another embodiment of the present invention correspondingly provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, where when the computer program runs, a device on which the computer-readable storage medium is located is controlled to execute the method for controlling heating of a power battery as described in any one of the above.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
when the heating starting condition of the power battery is met, the water pump and the heater of the liquid cooling system of the power battery are controlled to start, then when the heating power adjusting condition is met, the current cooling liquid state parameters in the liquid cooling system are obtained, the current target heating power of the heater is determined according to the current cooling liquid state parameters, and the heating power of the heater is adjusted according to the current target heating power, wherein the current cooling liquid state parameters comprise the current cooling liquid flow and the current cooling liquid inlet and outlet water temperature difference, so that the heating power of the heater can be accurately controlled according to the current cooling liquid state of the liquid cooling system to meet the actual heating requirement, the problem that the heating power of the heater is slow or the energy consumption is overlarge due to the fact that the heating power of the heater is not matched with the actual heating requirement is solved, and the heating of the power battery can be efficiently realized with low consumption.
Drawings
Fig. 1 is a schematic flow chart of a heating control method for a power battery according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a heating control method for a power battery according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a heating control device for a power battery according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another heating control device for a power battery according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Fig. 1 is a schematic flow chart of a heating control method for a power battery according to an embodiment of the present invention.
The embodiment of the invention provides a heating control method of a power battery, which can be applied to a liquid cooling system of the power battery. The method comprises the following steps:
s11, when the heating starting condition of the power battery is met, controlling a water pump and a heater of a liquid cooling system of the power battery to start;
s12, when a heating power adjusting condition is met, obtaining a current cooling liquid state parameter in the liquid cooling system, determining a current target heating power of the heater according to the current cooling liquid state parameter, and adjusting the heating power of the heater according to the current target heating power; and the current cooling liquid state parameters comprise the current cooling liquid flow and the current cooling liquid inlet and outlet water temperature difference.
It is understood that in step S11, whether to enter the heating mode is determined by determining whether the power battery heating start condition is satisfied.
It should be noted that, in this embodiment, both the heating start condition of the power battery and the heating power adjustment condition may be set according to actual requirements, and are not limited herein.
For example, the current duty ratio of the water pump may be obtained, so as to determine the current coolant flow m according to a correspondence relationship between the duty ratio and the coolant flow obtained in advance. In addition, the current cooling liquid inlet water temperature T of the liquid cooling system can be acquired through a temperature sensor inlet And the current coolant outlet water temperature T outlet According to the water inlet temperature T of the cooling liquid inlet And the coolant outlet water temperature T outlet And calculating to obtain the current temperature difference of the cooling liquid inlet and outlet water.
Specifically, the specific heat capacity of the cooling liquid is multiplied by the current flow rate of the cooling liquid and the current temperature difference between the cooling liquid and the water inlet and the water outlet, so as to estimate the power battery heat exchange power, and then the current target heating power is obtained.
In this embodiment, when the heating start condition of the power battery is met, the water pump and the heater of the liquid cooling system of the power battery are controlled to start, then, when the heating power adjustment condition is met, the current cooling liquid state parameter in the liquid cooling system is obtained, the current target heating power of the heater is determined according to the current cooling liquid state parameter, and the heating power of the heater is adjusted according to the current target heating power, wherein the current cooling liquid state parameter comprises the current cooling liquid flow and the current cooling liquid inlet and outlet water temperature difference, so that the heating power of the heater can be accurately controlled according to the current cooling liquid state of the liquid cooling system to meet the actual heating requirement, the problem that the heating power of the heater is not matched with the actual heating requirement due to slow heating or excessive energy consumption is avoided, and the heating of the power battery can be realized with low consumption and high efficiency.
As an optional embodiment, on the basis of the foregoing embodiment, the step S11 specifically includes:
and when the heating starting condition of the power battery is met, controlling a water pump of the liquid cooling system to start, and controlling the heater to start to work at a preset maximum heating power.
In this embodiment, when the heating start condition of the power battery is satisfied, the water pump of the liquid cooling system is controlled to start, and the heater is controlled to start to operate at a preset maximum heating power, so that the temperature of the cooling liquid can be rapidly increased to rapidly heat the power battery, thereby reducing the power consumption of the heater.
As an alternative embodiment, on the basis of the above embodiment, the method further comprises the steps of:
s13, when the heating stop condition of the power battery is met, controlling the heater to stop working;
and S14, after the heater is controlled to stop working, if the condition that the water pump stops running is judged to be met, controlling the water pump to stop running.
In this embodiment, when the power battery heating stop condition is satisfied, control the heater stop work to can avoid producing unnecessary heating power consumption, and, control heater stop work back, if judge that the water pump stall condition satisfies, then control the water pump stall, thereby can effectively reduce the battery heating difference in temperature.
Optionally, the power battery heating starting condition is specifically as follows:
the current lowest temperature of the power battery is smaller than a first preset temperature value;
the power battery heating stop condition is specifically as follows:
the current lowest temperature of the power battery is greater than a second preset temperature value;
the first preset temperature value is smaller than the second preset temperature value;
the water pump stop operation conditions are specifically as follows:
and the difference between the current cooling liquid inlet temperature in the liquid cooling system and the current lowest temperature of the power battery is smaller than a third preset temperature value.
It should be noted that, in specific implementation, the first preset temperature value, the second preset temperature value, and the third preset temperature value may be set according to actual requirements, which is not limited herein. Of course, the closer the third preset temperature value is set to 0, the better the battery temperature is maintained.
In this embodiment, through with the water pump stop operation condition sets up to current coolant liquid inlet temperature in the liquid cooling system with power battery's current minimum temperature difference is less than the third and predetermines the temperature value, can effectively guarantee like this that coolant liquid inlet temperature is close with power battery's current minimum temperature to guarantee to stop the back with the water pump, battery temperature is kept to can be fine.
As one optional embodiment, on the basis of the above embodiment, the heating power adjustment condition is specifically:
and the inlet water temperature of the current cooling liquid in the liquid cooling system reaches a target cooling liquid temperature value.
In this embodiment, through will heating power adjustment condition sets up to current coolant liquid water inlet temperature in the liquid cooling system reaches target coolant liquid temperature value, can maintain coolant liquid temperature near target coolant liquid temperature value like this to reduce the difference in temperature among the power battery heating process.
In addition, it is worth to be noted that, in the prior art, in order to control the battery temperature within the appropriate working temperature range, the heater performs corresponding power adjustment according to the battery temperature during heating, however, the power adjustment during the operation of the heater generates an instantaneous large current, and particularly, an instantaneous impact is easily formed on the battery during a charging condition to cause a battery overcharge phenomenon.
Specifically, when the current lowest temperature of the power battery is less than a fourth preset temperature value, the target cooling liquid temperature value is equal to a fifth preset temperature value;
when the current lowest temperature of the power battery is greater than or equal to the fourth preset temperature value, the target cooling liquid temperature value is equal to a sixth preset temperature value;
wherein the fifth preset temperature value is greater than the sixth preset temperature value.
For example, the fourth preset temperature value may be set according to the thermal characteristics and the operation mode of the power battery, and is not limited herein.
For example, the fifth preset temperature value and the sixth preset temperature value may be set to be within a certain range, for example, 15-30 ℃, from the current lowest temperature of the power battery, so that the temperature rise rate can be effectively controlled to reduce the temperature difference of the battery during the heating process. It will be appreciated that the greater the difference, the faster the heating.
In this embodiment, the target coolant temperature value can be reasonably set according to the current lowest temperature of the power battery, so that the temperature rise rate is reasonably controlled to reduce the battery temperature difference in the heating process.
As an optional embodiment, on the basis of the above embodiment, the adjusting the heating power of the heater according to the current target heating power specifically includes:
and adjusting the heating power of the heater to be the sum of the current target heating power and preset compensation power.
For example, the preset compensation power may be set according to an actual heat loss condition, and is not limited herein.
In this embodiment, the heating power of the heater is adjusted to the sum of the current target heating power and the preset compensation power, so that insufficient heating caused by heat loss can be effectively avoided, and the temperature difference of the battery in the heating process can be effectively reduced.
For example, fig. 2 shows a specific flow of the heating control method for the power battery provided in this embodiment, and details may refer to the contents in the foregoing embodiment, which are not described herein again, where T3 in fig. 2 refers to the third preset temperature value.
Fig. 3 is a schematic structural diagram of a heating control device for a power battery according to an embodiment of the present invention.
Correspondingly, an embodiment of the present invention provides a heating control device for a power battery, including:
the heating starting module 21 is used for controlling a water pump and a heater of a liquid cooling system of the power battery to start when the heating starting condition of the power battery is met;
the power adjusting module 22 is configured to, when a heating power adjusting condition is met, obtain a current cooling liquid state parameter in the liquid cooling system, determine a current target heating power of the heater according to the current cooling liquid state parameter, and adjust the heating power of the heater according to the current target heating power; and the current cooling liquid state parameters comprise the current cooling liquid flow and the current cooling liquid inlet and outlet water temperature difference.
In this embodiment, when the heating start condition of the power battery is met, the water pump and the heater of the liquid cooling system of the power battery are controlled to start, then, when the heating power adjustment condition is met, the current cooling liquid state parameter in the liquid cooling system is obtained, the current target heating power of the heater is determined according to the current cooling liquid state parameter, and the heating power of the heater is adjusted according to the current target heating power, wherein the current cooling liquid state parameter comprises the current cooling liquid flow and the current cooling liquid inlet and outlet water temperature difference, so that the heating power of the heater can be accurately controlled according to the current cooling liquid state of the liquid cooling system to meet the actual heating requirement, the problem that the heating power of the heater is not matched with the actual heating requirement due to slow heating or excessive energy consumption is avoided, and the heating of the power battery can be realized with low consumption and high efficiency.
As one optional embodiment, the heating start module 21 is specifically configured to:
and when the heating starting condition of the power battery is met, controlling a water pump of the liquid cooling system to start, and controlling the heater to start to work at a preset maximum heating power.
As one of the optional embodiments, the apparatus further comprises:
the heating stopping module is used for controlling the heater to stop working when the heating stopping condition of the power battery is met;
and the water pump stopping module is used for controlling the water pump to stop running if judging that the water pump running stopping condition is met after controlling the heater to stop working.
Further, the heating starting condition of the power battery is specifically as follows:
the current lowest temperature of the power battery is smaller than a first preset temperature value;
the power battery heating stop conditions are as follows:
the current lowest temperature of the power battery is greater than a second preset temperature value;
wherein the first preset temperature value is smaller than the second preset temperature value;
the water pump stop operation conditions are specifically as follows:
and the difference between the current cooling liquid inlet water temperature in the liquid cooling system and the current lowest temperature of the power battery is smaller than a third preset temperature value.
As one optional embodiment, the heating power adjustment condition is specifically:
and the inlet water temperature of the current cooling liquid in the liquid cooling system reaches a target cooling liquid temperature value.
Specifically, when the current lowest temperature of the power battery is less than a fourth preset temperature value, the target cooling liquid temperature value is equal to a fifth preset temperature value;
when the current lowest temperature of the power battery is greater than or equal to the fourth preset temperature value, the target cooling liquid temperature value is equal to a sixth preset temperature value;
wherein the fifth preset temperature value is greater than the sixth preset temperature value.
As one optional embodiment, the adjusting the heating power of the heater according to the current target heating power specifically includes:
and adjusting the heating power of the heater to be the sum of the current target heating power and preset compensation power.
Fig. 4 is a schematic view of another heating control device for a power battery according to an embodiment of the present invention.
The heating control device for the power battery provided by the embodiment of the invention comprises a processor 31, a memory 32 and a computer program which is stored in the memory 32 and configured to be executed by the processor 31, wherein the processor 31 realizes the heating control method for the power battery according to any one of the above embodiments when executing the computer program.
The processor 31, when executing the computer program, implements the steps in the above-mentioned embodiment of the heating control method for the power battery, for example, all the steps of the heating control method for the power battery shown in fig. 1. Alternatively, the processor 31, when executing the computer program, implements the functions of each module/unit in the above-mentioned heating control device for power battery, for example, the functions of each module of the heating control device for power battery shown in fig. 3.
Illustratively, the computer program may be divided into one or more modules, which are stored in the memory 32 and executed by the processor 31 to accomplish the present invention. The one or more modules may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program in the heating control device of the power battery. For example, the computer program may be divided into a heating start module and a power adjustment module, and each module has the following specific functions: the heating starting module is used for controlling the starting of a water pump and a heater of a liquid cooling system of the power battery when the heating starting condition of the power battery is met; the power adjusting module is used for acquiring current cooling liquid state parameters in the liquid cooling system when heating power adjusting conditions are met, determining current target heating power of the heater according to the current cooling liquid state parameters, and adjusting the heating power of the heater according to the current target heating power; and the current cooling liquid state parameters comprise the current cooling liquid flow and the current cooling liquid inlet and outlet water temperature difference.
The heating control device of the power battery can be computing equipment such as a desktop computer, a notebook computer, a palm computer and a cloud server. The heating control device of the power battery may include, but is not limited to, a processor 31 and a memory 32. It will be understood by those skilled in the art that the schematic diagram is merely an example of the heating control device of the power battery, and does not constitute a limitation to the heating control device of the power battery, and may include more or less components than those shown, or combine some components, or different components, for example, the heating control device of the power battery may further include an input and output device, a network access device, a bus, etc.
The Processor 31 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. The general processor may be a microprocessor or the processor may be any conventional processor, etc., and the processor 31 is a control center of the heating control device of the power battery, and various interfaces and lines are used to connect various parts of the heating control device of the whole power battery.
The memory 32 can be used to store the computer programs and/or modules, and the processor 31 implements various functions of the heating control device of the power battery by running or executing the computer programs and/or modules stored in the memory 32 and calling the data stored in the memory 32. The memory 32 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to the use of the heating control device of the power battery, and the like. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
Wherein, the module/unit integrated with the heating control device of the power battery can be stored in a computer readable storage medium if the module/unit is realized in the form of a software functional unit and is sold or used as an independent product. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims (10)

1. A heating control method of a power battery is characterized by comprising the following steps:
when the heating starting condition of the power battery is met, controlling a water pump and a heater of a liquid cooling system of the power battery to start;
when the heating power adjustment condition is met, acquiring a current cooling liquid state parameter in the liquid cooling system, determining a current target heating power of the heater according to the current cooling liquid state parameter, and adjusting the heating power of the heater according to the current target heating power; and the current cooling liquid state parameters comprise the current cooling liquid flow and the current cooling liquid inlet and outlet water temperature difference.
2. The heating control method according to claim 1, wherein when the power battery heating start condition is satisfied, the water pump and the heater of the liquid cooling system are controlled to start, specifically:
and when the heating starting condition of the power battery is met, controlling a water pump of the liquid cooling system to start, and controlling the heater to start to work at a preset maximum heating power.
3. The heating control method according to claim 1, characterized by further comprising the steps of:
when the heating stop condition of the power battery is met, controlling the heater to stop working;
and after the heater is controlled to stop working, if the condition that the water pump stops running is judged to be met, controlling the water pump to stop running.
4. The heating control method according to claim 3, wherein the power battery heating start condition is specifically:
the current lowest temperature of the power battery is smaller than a first preset temperature value;
the power battery heating stop conditions are as follows:
the current lowest temperature of the power battery is greater than a second preset temperature value;
wherein the first preset temperature value is less than or equal to the second preset temperature value;
the water pump stop operation conditions are as follows:
and the difference between the current cooling liquid inlet water temperature in the liquid cooling system and the current lowest temperature of the power battery is smaller than a third preset temperature value.
5. The heating control method according to claim 1, wherein the heating power adjustment condition is specifically:
and the inlet water temperature of the current cooling liquid in the liquid cooling system reaches a target cooling liquid temperature value.
6. The heating control method according to claim 5, wherein when the current lowest temperature of the power battery is less than a fourth preset temperature value, the target coolant temperature value is equal to a fifth preset temperature value;
when the current lowest temperature of the power battery is greater than or equal to the fourth preset temperature value, the target cooling liquid temperature value is equal to a sixth preset temperature value;
wherein the fifth preset temperature value is greater than the sixth preset temperature value.
7. The heating control method according to claim 1, wherein the adjusting of the heating power of the heater according to the current target heating power is specifically:
and adjusting the heating power of the heater to be the sum of the current target heating power and preset compensation power.
8. A heating control device of a power battery is characterized by comprising:
the heating starting module is used for controlling a water pump and a heater of a liquid cooling system of the power battery to start when the heating starting condition of the power battery is met;
the power adjusting module is used for acquiring current cooling liquid state parameters in the liquid cooling system when heating power adjusting conditions are met, determining current target heating power of the heater according to the current cooling liquid state parameters, and adjusting the heating power of the heater according to the current target heating power; and the current cooling liquid state parameters comprise the current cooling liquid flow and the current cooling liquid inlet and outlet water temperature difference.
9. A heating control device for a power battery, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor implements the heating control method for the power battery according to any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, comprising a stored computer program, wherein when the computer program runs, the computer-readable storage medium controls an apparatus to execute the heating control method of the power battery according to any one of claims 1 to 7.
CN202110359667.0A 2021-04-02 2021-04-02 Heating control method and device for power battery and storage medium Pending CN115189072A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110359667.0A CN115189072A (en) 2021-04-02 2021-04-02 Heating control method and device for power battery and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110359667.0A CN115189072A (en) 2021-04-02 2021-04-02 Heating control method and device for power battery and storage medium

Publications (1)

Publication Number Publication Date
CN115189072A true CN115189072A (en) 2022-10-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110359667.0A Pending CN115189072A (en) 2021-04-02 2021-04-02 Heating control method and device for power battery and storage medium

Country Status (1)

Country Link
CN (1) CN115189072A (en)

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