Immersed battery pack heat dissipation control method, electronic device and computer readable medium

Abstract

The present invention discloses a heat dissipation control method for an immersed battery pack, an electronic device and a computer-readable medium, which are used for a main control module of an immersed battery pack. The control method comprises the following steps: obtaining a relationship between battery temperature and inlet temperature, and a relationship between battery temperature and coolant flow rate output by Fluent software; based on the relationship between battery temperature and inlet temperature, and the relationship between battery temperature and coolant flow rate, adjusting the inlet temperature and the coolant flow rate according to the battery temperature; the inlet temperature decreases as the battery temperature increases, and the coolant flow rate increases as the battery temperature increases. The present invention can improve the thermal management of immersed battery packs.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal management of energy storage batteries, and in particular to a heat dissipation control method for an immersed battery pack, an electronic device and a computer-readable medium. Background Art

[0002] Immersed PACK (i.e. immersed battery pack), a liquid-cooled energy storage mode different from air cooling, has gradually become a research hotspot. Among the many liquid cooling methods, immersing the battery pack directly in the coolant and relying on the circulation of ethylene glycol aqueous solution in the cold plate to take away the heat, has the significant advantages of small intermediate thermal resistance and strong heat transfer capacity, which can avoid local overheating of single cells leading to shortened battery life or even failure and loss of control. At the same time, the battery module immersed in the coolant is isolated from the air, which can greatly improve the safety performance. It has gradually attracted attention in recent years.

[0003] Thermal management has always been the most important issue for immersion PACK. The rapid growth of immersion PACK requires more efficient and reliable energy storage safety technology. Among the related technologies, the testing and debugging of immersion PACK heat dissipation parameters is difficult, and the development cycle of immersion PACK parameter design and debugging is long, which seriously delays the overall development node of immersion PACK. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art to a certain extent. To this end, the present invention provides a method for designing parameters of an immersion battery pack and a heat dissipation method, device and debugging system.

[0005] In order to achieve the above object, a first aspect of the present invention provides a heat dissipation control method for an immersed battery pack, which is used for a main control module of an immersed battery pack, comprising the following steps:

[0006] Obtain the relationship between battery temperature and liquid inlet temperature, and the relationship between battery temperature and coolant flow rate output by Fluent software;

[0007] Based on the relationship between the battery temperature and the inlet temperature, and the relationship between the battery temperature and the coolant flow rate, the inlet temperature and the coolant flow rate are adjusted according to the battery temperature; the inlet temperature decreases as the battery temperature increases, and the coolant flow rate increases as the battery temperature increases.

[0008] Optionally, the step of obtaining the relationship between the battery temperature and the liquid inlet temperature, and the relationship between the battery temperature and the coolant flow rate output by the Fluent software includes:

[0009] Establishing a three-dimensional geometric model of the battery and the liquid cooling plate of the battery pack by using SOLIDWORKS software;

[0010] Performing mesh discretization on the three-dimensional geometric model to form a mesh model;

[0011] The grid model is simulated and analyzed based on the heat generation model of the battery and the liquid cooling plate parameters to obtain the temperature field simulation results of the battery pack under different battery discharge rates, and the liquid inlet temperature and coolant flow rate of the liquid cooling plate are extracted from the temperature field simulation results that meet the battery design temperature;

[0012] A battery pack temperature field experiment is performed based on the liquid inlet temperature and coolant flow rate of the liquid cooling plate extracted from the temperature field simulation results, and the relationship between the battery temperature and the liquid inlet temperature, and the relationship between the battery temperature and the coolant flow rate are calculated based on the experimental results of the temperature field experiment.

[0013] Optionally, the simulation analysis of the grid model based on the heat generation model of the battery and the liquid cooling plate parameters includes:

[0014] Importing the mesh model into Fluent software;

[0015] Set the battery heating model of the battery;

[0016] Set the cold plate structure parameters;

[0017] Setting boundary conditions, including setting the boundary condition of the liquid cooling plate inlet as a velocity inlet, the boundary condition of the liquid cooling plate outlet as a pressure outlet, and setting the boundary conditions of the upper and lower surfaces and the side surfaces of the battery as wall surfaces;

[0018] Perform iterative calculations.

[0019] Optionally, the calculation formula of the battery heating model is as follows:

[0020] Q=Q1+Q2 (1)

[0021] Q1=I(EU) (2)

[0022]

[0023] In the formula, Q1 represents the sum of Joule heat and polarization heat in battery heat generation, Q2 represents the reaction heat in battery heat generation, I represents the discharge current, E represents the battery open circuit voltage, U represents the battery terminal voltage, and T represents the preset battery temperature. represents the entropy coefficient.

[0024] Optionally, the parameters of the liquid cooling plate include the contact area A between the liquid cooling plate and the cooling oil. L , pipe diameter in the liquid cooling plate The curvature of the pipe in the liquid cooling plate C L , entropy coefficient of the liquid cooling plate.

[0025] Optionally, the relationship between the battery temperature and the inlet temperature, and the relationship between the battery temperature and the working fluid flow rate are calculated based on the experimental results of the temperature field experiment, including:

[0026] Select i temperature test points on the battery surface of the battery pack, and obtain the temperature T of the temperature test point i ;

[0027] T i With T i+1 For comparison, if T i With T i+1 If the difference between the two is greater than the preset error threshold, the liquid inlet temperature and the coolant flow rate of the liquid cooling plate are adjusted so that T i With T i+1 The difference is less than or equal to the preset error threshold;

[0028] In T i With T i+1 When the difference is less than or equal to a preset error threshold, the corresponding battery temperature, liquid inlet temperature and coolant flow rate are recorded, and the relationship between the battery temperature and the liquid inlet temperature, as well as the relationship between the battery temperature and the coolant flow rate are obtained by fitting.

[0029] Optionally, selecting i temperature test points on the battery surface of the battery pack includes:

[0030] Five temperature test points are selected on the battery surface of the battery pack, four of which are arranged in a rectangular array on the surface of the battery, and the other temperature test point is set at the center of the rectangular array.

[0031] Optionally, after obtaining the relationship between the battery temperature and the liquid inlet temperature and the relationship between the battery temperature and the coolant flow rate output by the Fluent software, it also includes:

[0032] Conducting experiments at the liquid inlet temperature of the liquid cooling plate and the coolant flow rate in the liquid cooling plate to collect actual temperature values ​​of multiple detection points in the battery pack;

[0033] Selecting the highest temperature value and the lowest temperature value among the actual temperature values ​​of the multiple detection points, and calculating the maximum temperature difference between the multiple detection points;

[0034] Comparing the maximum temperature difference with a preset temperature difference threshold to obtain a comparison result;

[0035] If the comparison result does not satisfy the preset condition, adjusting the liquid inlet temperature of the liquid cooling plate and the flow rate of the coolant in the liquid cooling plate so that the comparison result satisfies the preset condition;

[0036] The battery temperature that meets the preset condition and the corresponding liquid inlet temperature of the liquid cooling plate and the coolant flow rate in the liquid cooling plate are stored, and a new relationship between the battery temperature and the liquid inlet temperature and the relationship between the battery temperature and the coolant flow rate is obtained by fitting;

[0037] Based on the new relationship between the battery temperature and the inlet liquid temperature, and the relationship between the battery temperature and the coolant flow rate, the inlet liquid temperature and the coolant flow rate are adjusted according to the required battery temperature.

[0038] The second aspect of the present invention provides a main control module, one or more processors; a memory on which one or more computer programs are stored. When the one or more computer programs are executed by the one or more processors, the one or more processors implement the control method provided by the first aspect of the present invention.

[0039] The third aspect of the present invention provides a computer-readable medium having a computer program stored thereon, and when the computer program is executed by a processor (101), the control method provided by the first aspect of the present invention is implemented.

[0040] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. The best embodiments or means of the present invention will be described in detail in conjunction with the drawings, but they are not intended to limit the technical solutions of the present invention. In addition, there are multiple features, elements, and components that appear in each of the following texts and drawings, and different symbols or numbers are marked for convenience, but they all represent components with the same or similar structures or functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention will be further described below in conjunction with the accompanying drawings:

[0042] Figure 1 The figure is a flow chart of the heat dissipation parameter design method of the present invention.

[0043] Figure 2 Schematic diagram of temperature test points of the present invention.

[0044] Figure 3 It is a structural schematic diagram of the debugging system of the present invention.

[0045] Figure 4 The figure is a flow chart of the heat dissipation parameter design method and the heat dissipation method of the present invention.

[0046] Figure 5 This is a schematic diagram of the main control module of the present invention.

[0047] Figure 6 A schematic diagram of a computer readable medium according to the present invention.

[0048] Among them, 101 is a processor; 102 is a memory; 103 is an I / O interface; 104 is a bus. DETAILED DESCRIPTION

[0049] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments in the implementation manner are intended to be used to explain the present invention and should not be construed as limiting the present invention.

[0050] References in this specification to "one embodiment" or "an example" or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment itself may be included in at least one embodiment of the present patent disclosure. The appearance of the phrase "in one embodiment" in various places in the specification does not necessarily refer to the same embodiment.

[0051] In the related art, the testing, debugging and development of the heat dissipation parameters of the immersed energy storage battery pack are difficult and have a long development cycle. The development pace seriously delays the overall development nodes of the energy storage system. There is a lack of a heat dissipation parameter design and adjustment method for the immersed battery pack to support the development of immersed energy storage.

[0052] In view of this, if Figure 1 As shown, the first aspect of the present invention provides a heat dissipation control method for an immersed battery pack, which is used for a main control module of an immersed battery pack, and is characterized in that it includes the following steps:

[0053] S10, obtaining a relationship between the battery temperature and the liquid inlet temperature, and a relationship between the battery temperature and the coolant flow rate, output by the Fluent software;

[0054] S20, based on the relationship between the battery temperature and the inlet temperature, and the relationship between the battery temperature and the coolant flow rate, adjusting the inlet temperature and the coolant flow rate according to the required battery temperature; the inlet temperature decreases as the battery temperature increases, and the coolant flow rate increases as the battery temperature increases

[0055] Specifically, step S10 includes the following steps:

[0056] S11. Establish a three-dimensional geometric model of the battery pack;

[0057] S12, performing mesh discretization on the three-dimensional geometric model to form a mesh model;

[0058] S13, performing simulation analysis on the grid model based on the heat generation model of the battery and the liquid cooling plate parameters, obtaining the temperature field simulation results of the battery pack under different battery discharge rates, and extracting the liquid inlet temperature and coolant flow rate of the liquid cooling plate from the temperature field simulation results that meet the battery design temperature;

[0059] S14. Perform a battery pack temperature field experiment according to the liquid inlet temperature and the coolant flow rate of the liquid cooling plate extracted from the temperature field simulation results, and calculate the relationship between the battery temperature and the liquid inlet temperature, and the relationship between the battery temperature and the coolant flow rate based on the experimental results of the temperature field experiment.

[0060] In step S11, a three-dimensional geometric model of the battery pack is established, including establishing a three-dimensional geometric model of the battery and the liquid cooling plate of the battery pack using SOLIDWORKS software. Heat is transferred by heat conduction between the battery, the cooling oil and the liquid cooling plate.

[0061] In step S12, ICEM software is used to divide the grid. Since the internal structure of the battery cell is relatively simple and all of them are prisms, a structured grid is used.

[0062] In step S13, the grid model is simulated and analyzed based on the heat generation model of the battery and the liquid cooling plate parameters, including:

[0063] S131, importing the grid model into Fluent software;

[0064] S132, setting a battery heating model of the battery; the calculation formula of the battery heating model is as follows:

[0065] Q=Q1+Q2 (1)

[0066] Q1=I(EU) (2)

[0067]

[0068] In the formula, Q1 represents the sum of Joule heat and polarization heat in battery heat generation, Q2 represents the reaction heat in battery heat generation, I represents the discharge current, E represents the battery open circuit voltage, U represents the battery terminal voltage, and T represents the preset battery temperature. represents the entropy coefficient.

[0069] S133, setting the cold plate structural parameters; the parameters of the liquid cooling plate include the contact area A between the liquid cooling plate and the cooling oil L , pipe diameter in the liquid cooling plate The curvature of the pipe in the liquid cooling plate C L , entropy coefficient of the liquid cooling plate.

[0070] S134, setting boundary conditions, including setting the boundary condition of the liquid cooling plate inlet to a velocity inlet, the boundary condition of the liquid cooling plate outlet to a pressure outlet, and setting the boundary conditions of the upper and lower surfaces and the side surfaces of the battery to a wall surface;

[0071] S134. Perform iterative calculation.

[0072] In step S14, the relationship between the battery temperature and the inlet temperature, and the relationship between the battery temperature and the working fluid flow rate are calculated based on the experimental results of the temperature field experiment, including:

[0073] 1S41, select i temperature test points on the battery surface of the battery pack, and obtain the temperature T of the temperature test point i ;

[0074] S142, T i With T i+1 For comparison, if T i With T i+1 If the difference between the two is greater than the preset error threshold, the liquid inlet temperature and the coolant flow rate of the liquid cooling plate are adjusted so that T i With T i+1 The difference is less than or equal to the preset error threshold;

[0075] S143, in T i With T i+1 When the difference is less than or equal to a preset error threshold, the corresponding battery temperature, liquid inlet temperature and coolant flow rate are recorded, and the relationship between the battery temperature and the liquid inlet temperature, as well as the relationship between the battery temperature and the coolant flow rate are obtained by fitting.

[0076] In some feasible embodiments, five temperature test points are selected on the surface of the battery of the battery pack, four of which are arranged in a rectangular array on the surface of the battery, and the other temperature test point is set at the center of the rectangular array.

[0077] It should be noted that the design temperature of the battery in this embodiment refers to: among the five temperature test points, T i With T i+1 The difference is less than or equal to 2 degrees Celsius, and the battery temperature range is between 25 degrees Celsius and 35 degrees Celsius.

[0078] In some other embodiments, after S10, the method further includes:

[0079] Conducting an experiment at the liquid inlet temperature and the coolant flow rate to collect actual temperature values ​​of multiple detection points in the battery pack;

[0080] Selecting the highest temperature value and the lowest temperature value among the actual temperature values ​​of the multiple detection points, and calculating the maximum temperature difference between the multiple detection points;

[0081] Comparing the maximum temperature difference with a preset temperature difference threshold to obtain a comparison result;

[0082] If the comparison result does not satisfy the preset condition, adjusting the liquid inlet temperature of the liquid cooling plate and the flow rate of the coolant in the liquid cooling plate so that the comparison result satisfies the preset condition;

[0083] The battery temperature that meets the preset condition and the corresponding liquid inlet temperature of the liquid cooling plate and the coolant flow rate in the liquid cooling plate are stored, and a new relationship between the battery temperature and the liquid inlet temperature and the relationship between the battery temperature and the coolant flow rate is obtained by fitting;

[0084] Based on the new relationship between the battery temperature and the inlet liquid temperature, and the relationship between the battery temperature and the coolant flow rate, the inlet liquid temperature and the coolant flow rate are adjusted according to the required battery temperature.

[0085] In this embodiment, a PID thermostat can be used to control the temperature of the battery pack. The PID controller is also called a proportional integral differential controller, which has a simple structure, reliable operation, and convenient adjustment. The PID thermostat uses Autonics TX4S-B4C. The communication mode between the PID thermostat and the CPU processing unit is 2-wire half-duplex, and the communication protocol is Modbus RTU. The PID thermostat controls the operation of the liquid cooling unit through the electric drive system. Specifically, the electric drive system is divided into two parts, one for driving the simulated load operation, and the other for driving the liquid cooling unit operation.

[0086] The temperature test point uses a temperature recorder to collect the temperature. The specific temperature recorder uses a HY-R3024 paperless recorder. The communication between the temperature recorder and the processing unit CPU is compiled through the memory using the standard Modbus RTU protocol. The memory includes but is not limited to portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk, read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above. The design device processes the collected data into a function curve and inputs it into the temperature controller. The temperature controller sends the temperature signal required for the battery pack working condition to the electric drive system, and the electric drive system adjusts the load and liquid cooling unit.

[0087] In one possible embodiment, Figure 4 As shown in the simulation model, the battery is discharged at 1C, 2C, and 3C, and the battery heat is Q (1C-3C) , input the discharge current, battery open circuit voltage, battery terminal voltage, preset battery temperature and entropy coefficient into the Fluent software to calculate the total heat generation of the battery.

[0088] Calculate Q based on Fluent software simulation model (1C-3C), then set the cell temperature to 25℃, 26℃, 27℃, 28℃...35℃ (interval is 1℃), the required cooling oil temperature T a .

[0089] Then set the cold plate parameters, including the contact area A between the liquid cold plate and the cooling oil. L , Liquid cooling plate flow channel diameter Liquid cooling plate pipe curvature C L , entropy coefficient, and calculate the flow rate V of the ethylene glycol aqueous solution in the liquid cooling plate when the battery temperature is 25℃, 26℃, 27℃, 28℃...35℃ (interval is 1℃). l(1-33) , liquid inlet temperature of liquid cooling plate T l(1-33) The numerical value of .

[0090] With the above parameters, manually set the liquid cooling unit (manually input the flow rate V of the ethylene glycol aqueous solution in the liquid cooling plate l(1-33) , liquid inlet temperature of liquid cooling plate T l(1-33) The value is sent to the controller), the compressor in the liquid cooling unit is frequency-adjusted, the water pump is frequency-adjusted, and the power of the simulated load is adjusted. After the adjustment, the power is turned on for discharge.

[0091] like Figure 3 As shown, each cell is provided with 5 thermocouples, and there are three cells in total. Cell A is on the leftmost side of the first module, cell B is in the middle of the second module, and cell C is on the rightmost side of the third module. The temperature recorder records these 15 sets of data, and compares whether the difference between these 15 sets of data is within 2°C. If it is within this range, the data is imported into the CPU processing unit, and the computer draws the curve, and the curve is imported into the PID thermostat, and then the thermostat sends a signal to the electric drive system, and the parameters required by the test bench under this condition in the electric drive system are automatically imported into the CPU processing unit, and then the chiller and the simulated load automatically adjust the frequency and power.

[0092] Finally, it is possible to test whether the performance of the submerged battery pack meets the preset requirements after being controlled by the electric drive system. It should be noted that the preset requirements described in this embodiment refer to the following: i With T i+1 The difference is less than or equal to 3 degrees Celsius, and the battery temperature range is between 23 degrees Celsius and 37 degrees Celsius.

[0093] As a second aspect of the present invention, a main control module is provided, wherein: Figure 5As shown, the main control module includes: one or more processors 101; a memory 102, on which one or more computer programs are stored. When the one or more computer programs are executed by the one or more processors 101, the one or more processors 101 implement the control method provided by the first aspect of the present invention.

[0094] The main control module may further include one or more I / O interfaces 103 connected between the processor 101 and the memory 102 and configured to implement information interaction between the processor 101 and the memory 102 .

[0095] Among them, the processor 101 is a device with data processing capabilities, including but not limited to the central processing unit 101 (CPU), etc.; the memory 102 is a device with data storage capabilities, including but not limited to random access memory 102 (RAM, more specifically such as SDRAM, DDR, etc.), read-only memory 102 (ROM), electrically erasable programmable read-only memory 102 (EEPROM), flash memory (FLASH); the I / O interface 103 (read-write interface) is connected between the processor 101 and the memory 102, and can realize information interaction between the processor 101 and the memory 102, including but not limited to the data bus 104 (Bus), etc.

[0096] In some embodiments, the processor 101, the memory 102, and the I / O interface 103 are connected to each other via a bus 104, and further connected to other components of the main control module.

[0097] As a third aspect of the present invention, Figure 6 As shown, a computer readable medium is provided, on which a computer program is stored, wherein the computer program implements the above control method provided by the present invention when executed by the processor 101.

[0098] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A heat dissipation control method for an immersed battery pack, used for a main control module of an immersed battery pack, characterized in that: The following steps are involved: Obtain the relationship between battery temperature and liquid inlet temperature, and the relationship between battery temperature and coolant flow rate output by Fluent software; Based on the relationship between the battery temperature and the inlet temperature, and the relationship between the battery temperature and the coolant flow rate, the inlet temperature and the coolant flow rate are adjusted according to the required battery temperature; the inlet temperature decreases as the battery temperature increases, and the coolant flow rate increases as the battery temperature increases.

2. The heat dissipation control method of the submerged battery pack according to claim 1, characterized in that: The method of obtaining the relationship between the battery temperature and the liquid inlet temperature, and the relationship between the battery temperature and the coolant flow rate output by the Fluent software, includes: Establishing a three-dimensional geometric model of the battery and the liquid cooling plate of the battery pack by using SOLIDWORKS software; Performing mesh discretization on the three-dimensional geometric model to form a mesh model; The grid model is simulated and analyzed based on the heat generation model of the battery and the liquid cooling plate parameters to obtain the temperature field simulation results of the battery pack under different battery discharge rates, and the liquid inlet temperature and coolant flow rate of the liquid cooling plate are extracted from the temperature field simulation results that meet the battery design temperature; A battery pack temperature field experiment is performed based on the liquid inlet temperature and coolant flow rate of the liquid cooling plate extracted from the temperature field simulation results, and the relationship between the battery temperature and the liquid inlet temperature, and the relationship between the battery temperature and the coolant flow rate are calculated based on the experimental results of the temperature field experiment.

3. The heat dissipation control method of the submerged battery pack according to claim 2, characterized in that: The simulation analysis of the grid model based on the heat generation model of the battery and the liquid cooling plate parameters includes: Importing the mesh model into Fluent software; Set the battery heating model of the battery; Set the cold plate structure parameters; Setting boundary conditions, including setting the boundary condition of the liquid cooling plate inlet as a velocity inlet, the boundary condition of the liquid cooling plate outlet as a pressure outlet, and setting the boundary conditions of the upper and lower surfaces and the side surfaces of the battery as wall surfaces; Perform iterative calculations.

4. The heat dissipation control method of the submerged battery pack according to claim 3, characterized in that: The calculation formula of the battery heating model is as follows: Q=Q1+Q2 (1) Q1=I(EU) (2) In the formula, Q1 represents the sum of Joule heat and polarization heat in battery heat generation, Q2 represents the reaction heat in battery heat generation, I represents the discharge current, E represents the battery open circuit voltage, U represents the battery terminal voltage, and T represents the preset battery temperature. represents the entropy coefficient.

5. The heat dissipation control method of the submerged battery pack according to claim 3, characterized in that: The parameters of the liquid cooling plate include the contact area A between the liquid cooling plate and the cooling oil. L , pipe diameter in the liquid cooling plate The curvature of the pipe in the liquid cooling plate C L , entropy coefficient of the liquid cooling plate.

6. The heat dissipation control method of an immersion battery pack according to any one of claims 2 to 5, characterized in that: The relationship between the battery temperature and the inlet temperature, and the relationship between the battery temperature and the working fluid flow rate are calculated based on the experimental results of the temperature field experiment, including: Select i temperature test points on the battery surface of the battery pack, and obtain the temperature T of the temperature test point i ; T i With T i+1 For comparison, if T i With T i+1 If the difference between the two is greater than the preset error threshold, the liquid inlet temperature and the coolant flow rate of the liquid cooling plate are adjusted so that T i With T i+1 The difference is less than or equal to the preset error threshold; In T i With T i+1 When the difference is less than or equal to a preset error threshold, the corresponding battery temperature, liquid inlet temperature and coolant flow rate are recorded, and the relationship between the battery temperature and the liquid inlet temperature, as well as the relationship between the battery temperature and the coolant flow rate are obtained by fitting.

7. The heat dissipation control method of the submerged battery pack according to claim 6, characterized in that: The step of selecting i temperature test points on the battery surface of the battery pack comprises: Five temperature test points are selected on the battery surface of the battery pack, four of which are arranged in a rectangular array on the surface of the battery, and the other temperature test point is set at the center of the rectangular array.

8. The heat dissipation control method of the submerged battery pack according to claim 1, characterized in that: After obtaining the relationship between the battery temperature and the inlet temperature, and the relationship between the battery temperature and the coolant flow rate output by the Fluent software, it also includes: Conducting an experiment at the liquid inlet temperature and the coolant flow rate to collect actual temperature values ​​of multiple detection points in the battery pack; Selecting the highest temperature value and the lowest temperature value among the actual temperature values ​​of the multiple detection points, and calculating the maximum temperature difference between the multiple detection points; Comparing the maximum temperature difference with a preset temperature difference threshold to obtain a comparison result; If the comparison result does not satisfy the preset condition, adjusting the liquid inlet temperature of the liquid cooling plate and the flow rate of the coolant in the liquid cooling plate so that the comparison result satisfies the preset condition; The battery temperature that meets the preset condition and the corresponding liquid inlet temperature of the liquid cooling plate and the coolant flow rate in the liquid cooling plate are stored, and a new relationship between the battery temperature and the liquid inlet temperature and the relationship between the battery temperature and the coolant flow rate is obtained by fitting; Based on the new relationship between the battery temperature and the inlet liquid temperature, and the relationship between the battery temperature and the coolant flow rate, the inlet liquid temperature and the coolant flow rate are adjusted according to the required battery temperature.

9. A main control module, characterized in that: One or more processors (101); a memory (102) having one or more computer programs stored thereon, wherein when the one or more computer programs are executed by the one or more processors (101), the one or more processors (101) implement the control method according to any one of claims 1 to 8.

10. A computer readable medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor (101), the control method according to any one of claims 1 to 8 is implemented.

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