Thermal management method, device, equipment and storage medium for power battery

Abstract

The present invention belongs to the field of thermal management technology, and discloses a thermal management method, device, equipment and storage medium for a power battery. The method includes: obtaining modeling parameters and target temperature parameters of the power battery; determining the flow distribution ratio according to the modeling parameters; determining a first adjustment strategy according to the modeling parameters and the flow distribution ratio; determining a second adjustment strategy according to the target temperature parameters and the modeling parameters; and thermally managing the power battery according to the first adjustment strategy and the second adjustment strategy. In the above manner, the structure of the power battery is adjusted based on the first adjustment strategy and the second adjustment strategy, so that accurate thermal management of the power battery can be achieved, while ensuring the high efficiency of thermal management, the uniformity of the power battery temperature and the consistency of battery performance, providing safety guarantees for subsequent driving safety, and improving the user experience.

Description

Technical Field

[0001] The present invention relates to the field of thermal management technology, and in particular to a thermal management method, device, equipment and storage medium for a power battery. Background Art

[0002] With the increase in sales of electric vehicles, the thermal safety of power batteries has received increasing attention. Excessive battery temperature will affect battery performance, and in severe cases will lead to thermal runaway, thus affecting the driving safety of electric vehicles. Therefore, the safety of power batteries is the most important part of electric vehicle management. Under normal circumstances, it is necessary to ensure the uniformity of power battery temperature and the consistency of battery performance. However, the processing and research efficiency of battery performance consistency and battery temperature uniformity in the existing technology is still relatively low. Summary of the invention

[0003] The main purpose of the present invention is to provide a thermal management method, device, equipment and storage medium for a power battery, aiming to solve the technical problem that the prior art cannot efficiently perform thermal management on the power battery.

[0004] To achieve the above object, the present invention provides a thermal management method for a power battery, the thermal management method for a power battery comprising:

[0005] Obtain modeling parameters and target temperature parameters of the power battery;

[0006] Determining a flow distribution ratio according to the modeling parameters;

[0007] Determining a first adjustment strategy according to the modeling parameters and the flow distribution ratio;

[0008] determining a second adjustment strategy according to the target temperature parameter and the modeling parameter;

[0009] Thermal management is performed on the power battery according to the first adjustment strategy and the second adjustment strategy.

[0010] Optionally, determining the flow distribution ratio according to the modeling parameters includes:

[0011] Determine the number of battery cells according to the modeling parameters;

[0012] The flow distribution ratio is determined according to the number of battery cells.

[0013] Optionally, determining the first adjustment strategy according to the modeling parameter and the traffic distribution ratio includes:

[0014] Perform flow simulation according to the modeling parameters and the preset flow simulation model to obtain a flow simulation result;

[0015] Determine the actual flow ratio according to the flow simulation result;

[0016] A first adjustment strategy is determined according to the actual flow ratio and the flow distribution ratio.

[0017] Optionally, determining the first adjustment strategy according to the actual flow ratio and the flow distribution ratio includes:

[0018] Determining a flow difference ratio according to the actual flow ratio and the flow distribution ratio;

[0019] When the flow difference ratio is not within the preset flow range, determining the water inlet size and the water outlet size according to the modeling parameters;

[0020] A first adjustment strategy is determined according to the actual flow ratio, the flow distribution ratio, the water inlet size, and the water outlet size.

[0021] Optionally, the target temperature parameter includes at least one of an ambient temperature, a power battery temperature, and a water inlet temperature;

[0022] The determining the second adjustment strategy according to the target temperature parameter and the modeling parameter comprises:

[0023] Perform thermal simulation according to the external temperature, the power battery temperature, the water inlet temperature, the modeling parameters and the preset thermal simulation model to obtain a thermal simulation result;

[0024] Determining the actual temperature of each preset position in the power battery according to the thermal simulation result;

[0025] Acquiring a preset temperature at each of the preset positions;

[0026] A second adjustment strategy is determined according to the actual temperature and the preset temperature.

[0027] Optionally, determining the second adjustment strategy according to the actual temperature and the preset temperature includes:

[0028] determining a temperature difference between the actual temperature and the preset temperature;

[0029] A second adjustment strategy is determined according to the preset temperature range and the temperature difference.

[0030] Optionally, determining the second adjustment strategy according to the preset temperature range and the temperature difference includes:

[0031] Comparing the preset temperature range with the temperature difference value, and obtaining a temperature difference value that is not within the preset temperature range;

[0032] Acquire, in each of the preset positions, a target position corresponding to the temperature difference value that is not within the preset temperature range;

[0033] A second adjustment strategy is determined according to the target position.

[0034] In addition, to achieve the above-mentioned purpose, the present invention further provides a thermal management device for a power battery, the thermal management device for the power battery comprising:

[0035] An acquisition module, used to acquire modeling parameters and target temperature parameters of the power battery;

[0036] A determination module, used to determine the flow distribution ratio according to the modeling parameters;

[0037] The determination module is further used to determine a first adjustment strategy according to the modeling parameters and the traffic distribution ratio;

[0038] The determination module is further used to determine a second adjustment strategy according to the target temperature parameter and the modeling parameter;

[0039] A management module is used to perform thermal management on the power battery according to the first adjustment strategy and the second adjustment strategy.

[0040] In addition, to achieve the above-mentioned objectives, the present invention also proposes a thermal management device for a power battery, the thermal management device for the power battery comprising: a memory, a processor, and a thermal management program for the power battery stored in the memory and executable on the processor, the thermal management program for the power battery being configured to implement the thermal management method for the power battery as described above.

[0041] In addition, to achieve the above objectives, the present invention further proposes a storage medium, on which a thermal management program for a power battery is stored, and when the thermal management program for the power battery is executed by a processor, the thermal management method for the power battery as described above is implemented.

[0042] The present invention obtains the modeling parameters and target temperature parameters of the power battery; determines the flow distribution ratio according to the modeling parameters; determines the first adjustment strategy according to the modeling parameters and the flow distribution ratio; determines the second adjustment strategy according to the target temperature parameters and the modeling parameters; and performs thermal management on the power battery according to the first adjustment strategy and the second adjustment strategy. In the above manner, the first adjustment strategy and the second adjustment strategy corresponding to the current power battery are determined by the modeling parameters and the target temperature parameters of the power battery, and the structure of the power battery is adjusted based on the first adjustment strategy and the second adjustment strategy, which can achieve accurate thermal management of the power battery, while ensuring the high efficiency of thermal management, the uniformity of the power battery temperature, and the consistency of the battery performance, providing safety guarantees for subsequent driving safety, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the structure of a thermal management device for a power battery in a hardware operating environment involved in an embodiment of the present invention;

[0044] Figure 2 It is a schematic flow chart of a first embodiment of a thermal management method for a power battery of the present invention;

[0045] Figure 3 It is an overall schematic diagram of a second embodiment of a thermal management method for a power battery of the present invention;

[0046] Figure 4 This is a structural block diagram of a first embodiment of a thermal management device for a power battery of the present invention.

[0047] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0048] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0049] Reference Figure 1 , Figure 1 A schematic diagram of the structure of a thermal management device for a power battery in a hardware operating environment according to an embodiment of the present invention.

[0050] like Figure 1As shown, the thermal management device of the power battery may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wireless-Fidelity, Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0051] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the thermal management device of the power battery, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0052] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a thermal management program for a power battery.

[0053] exist Figure 1 In the thermal management device of the power battery shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the thermal management device of the power battery of the present invention can be set in the thermal management device of the power battery, and the thermal management device of the power battery calls the thermal management program of the power battery stored in the memory 1005 through the processor 1001, and executes the thermal management method of the power battery provided in the embodiment of the present invention.

[0054] The embodiment of the present invention provides a thermal management method for a power battery, referring to Figure 2 , Figure 2 The figure is a flow chart of a first embodiment of a thermal management method for a power battery according to the present invention.

[0055] The thermal management method of the power battery includes the following steps:

[0056] Step S10: Acquire modeling parameters and target temperature parameters of the power battery.

[0057] It should be noted that the executor of this embodiment is a terminal device, on which a thermal management system of a power battery is installed. The thermal management system of the power battery can obtain the modeling parameters and target temperature parameters of the power battery to be managed, determine the flow distribution ratio according to the modeling parameters, and thus determine a first adjustment strategy based on the modeling parameters and the flow distribution ratio, and determine a second adjustment strategy based on the modeling parameters and the target temperature parameters, and finally perform thermal management on the power battery to be managed based on the first adjustment strategy and the second adjustment strategy.

[0058] It should be understood that the first adjustment strategy refers to a strategy for adjusting the diameter of the water inlet and outlet of the power battery; the second adjustment strategy refers to a strategy for temperature control and regulation of a preset position in the power battery. The second adjustment strategy can be to change the structure of the preset position by adding a temperature averaging plate to achieve temperature control and regulation, or other temperature control and regulation methods. After obtaining the first adjustment strategy and the second adjustment strategy, the power battery is thermally managed again based on the adjusted modeling parameters of the power battery.

[0059] It can be understood that the modeling parameters refer to a series of parameters related to the composition of the power battery based on the structure and materials of the power battery, such as battery cell materials, thermal conductivity, number of cells and other parameters.

[0060] In a specific implementation, the target temperature parameter refers to a simulation parameter that needs to be obtained when performing thermal management. The target temperature parameter includes at least one of the ambient temperature, the power battery temperature, and the water inlet temperature.

[0061] Step S20: Determine the flow distribution ratio according to the modeling parameters.

[0062] It should be noted that the flow distribution ratio refers to the target flow ratio of the power battery passing through each cooling plate. After the modeling parameters are obtained, the flow distribution ratio can be determined according to the modeling parameters.

[0063] It can be understood that in order to obtain an accurate flow distribution ratio, so as to subsequently improve the accuracy of the first adjustment strategy, further, determining the flow distribution ratio according to the modeling parameters includes: determining the number of battery cells according to the modeling parameters; determining the flow distribution ratio according to the number of battery cells.

[0064] In the specific implementation, the number of battery cells in the modeling parameters is extracted. The number of battery cells refers to the number of battery cells of the same specification on each cooling plate in the power battery. The flow distribution ratio can be determined according to the number of battery cells, and the flow distribution ratio can also be determined by the number of modules in the modeling parameters.

[0065] Step S30: determining a first adjustment strategy according to the modeling parameters and the traffic distribution ratio.

[0066] It should be noted that after the modeling parameters and the flow distribution ratio are obtained, the first adjustment strategy can be determined according to the modeling parameters and the flow distribution ratio. The first adjustment strategy refers to a strategy for adjusting the sizes of the water inlet and the water outlet of the power battery.

[0067] It can be understood that in order to ensure the accuracy of the first adjustment strategy, further, the first adjustment strategy is determined according to the modeling parameters and the traffic distribution ratio, including: performing traffic simulation according to the modeling parameters and a preset traffic simulation model to obtain a traffic simulation result; determining the actual traffic ratio according to the traffic simulation result; and determining the first adjustment strategy according to the actual traffic ratio and the traffic distribution ratio.

[0068] In a specific implementation, the structure of the power battery is modeled according to the modeling parameters to obtain a modeling model, and the modeling model is input into a preset flow simulation model for flow simulation to obtain flow simulation results of the flow passing through each cooling plate. The actual flow ratio passing through each cooling plate in the power battery is determined according to the flow simulation results. After obtaining the actual flow ratio and the flow distribution ratio, the first adjustment strategy can be determined according to the actual flow ratio and the flow distribution ratio.

[0069] It should be noted that in order to obtain an accurate first adjustment strategy, further, the first adjustment strategy is determined according to the actual flow ratio and the flow distribution ratio, including: determining the flow difference ratio according to the actual flow ratio and the flow distribution ratio; when the flow difference ratio is not within the preset flow range, determining the water inlet size and the water outlet size according to the modeling parameters; determining the first adjustment strategy according to the actual flow ratio, the flow distribution ratio, the water inlet size and the water outlet size.

[0070] It can be understood that the flow difference ratio is determined according to the actual flow ratio and the flow distribution ratio. For example, the current flow distribution ratio is 1.2:1.2:1.2:1, and the actual flow ratio is 1:1:1:1, so the difference flow ratio of the first cooling plate relative to the flow distribution ratio is 16.7%. The current flow distribution ratio is 1.2:1.2:1.2:1, and the actual flow ratio is 1.2:1.2:1.2:1, then the difference flow ratio of each cooling plate relative to the flow distribution ratio is 0.

[0071] In a specific implementation, after obtaining the flow difference ratio, a preset flow range is obtained, and the preset flow range refers to a preset error range of the flow ratio difference. When the flow ratio difference is not within the preset flow range, it is necessary to determine the current water inlet size and water outlet size according to the modeling parameters, and determine the current water inlet size and water outlet size adjustment strategy according to the actual flow ratio and flow distribution ratio, thereby obtaining a first adjustment strategy.

[0072] Step S40: determining a second adjustment strategy according to the target temperature parameter and the modeling parameter.

[0073] It should be noted that the second adjustment strategy refers to a strategy for controlling the temperature of a preset position in the power battery. After obtaining the target temperature parameters and the modeling parameters, a thermal simulation is performed based on the target temperature parameters and the modeling parameters, and the second adjustment strategy is determined based on the thermal simulation results.

[0074] Step S50: performing thermal management on the power battery according to the first adjustment strategy and the second adjustment strategy.

[0075] It should be noted that after obtaining the first adjustment strategy and the second adjustment strategy, the structure of the power battery is adjusted based on the first adjustment strategy and the second adjustment strategy, so that the power battery structure can meet the simulation results, and finally complete the thermal management of the power battery.

[0076] This embodiment obtains the modeling parameters and target temperature parameters of the power battery; determines the flow distribution ratio according to the modeling parameters; determines the first adjustment strategy according to the modeling parameters and the flow distribution ratio; determines the second adjustment strategy according to the target temperature parameters and the modeling parameters; and performs thermal management on the power battery according to the first adjustment strategy and the second adjustment strategy. In the above manner, the first adjustment strategy and the second adjustment strategy corresponding to the current power battery are determined by the modeling parameters and the target temperature parameters of the power battery, and the structure of the power battery is adjusted based on the first adjustment strategy and the second adjustment strategy, so that accurate thermal management of the power battery can be achieved, while ensuring the high efficiency of thermal management, the uniformity of the power battery temperature, and the consistency of the battery performance, providing safety guarantees for subsequent driving safety, and improving the user experience.

[0077] refer to Figure 3 , Figure 3 This is a flow chart of a second embodiment of a thermal management method for a power battery according to the present invention.

[0078] Based on the first embodiment, the target temperature parameter in the thermal management method of the power battery in this embodiment includes at least one of the ambient temperature, the power battery temperature and the water inlet temperature. The step S40 includes:

[0079] Step S41: performing thermal simulation according to the external temperature, the power battery temperature, the water inlet temperature, the modeling parameters and the preset thermal simulation model to obtain a thermal simulation result.

[0080] It should be noted that the target temperature parameter includes at least one of the external temperature, the power battery temperature and the water inlet temperature. The external temperature refers to the external environment temperature where the power battery is located, the power battery temperature refers to the overall temperature of the power battery, and the water inlet temperature refers to the liquid temperature of the water inlet.

[0081] It can be understood that after the modeling parameters are obtained, the structure of the power battery is modeled to obtain a modeling model, and the modeling model, the external temperature, the power battery temperature, and the water inlet temperature are input into a preset thermal simulation model for thermal simulation to obtain the temperature distribution of each preset position in the power battery. The temperature distribution of each preset position in the power battery is the thermal simulation result.

[0082] Step S42: determining the actual temperature of each preset position in the power battery according to the thermal simulation result.

[0083] It should be noted that after obtaining the thermal simulation results, the actual temperature of each preset position in the power battery can be determined according to the thermal simulation results. Each preset position refers to the marked position corresponding to each structure obtained by dividing the power battery into structural areas.

[0084] Step S43: obtaining the preset temperature of each of the preset positions.

[0085] It should be noted that the preset temperature refers to the target temperature of each preset position.

[0086] According to S44 , a second adjustment strategy is determined according to the actual temperature and the preset temperature.

[0087] It should be noted that after the actual temperature and the preset temperature are obtained, the second adjustment strategy may be determined based on the actual temperature and the preset temperature of each preset position.

[0088] It can be understood that in order to obtain an accurate second adjustment strategy, further, determining the second adjustment strategy based on the actual temperature and the preset temperature includes: determining the temperature difference between the actual temperature and the preset temperature; and determining the second adjustment strategy based on the preset temperature range and the temperature difference.

[0089] In a specific implementation, the temperature difference between the actual temperature and the preset temperature is determined, and the preset temperature range refers to an acceptable range of a preset temperature difference. After obtaining the preset temperature range and the temperature difference, a second adjustment strategy is determined based on the preset temperature range and the temperature difference.

[0090] It should be noted that in order to formulate an accurate second adjustment strategy based on the preset temperature range and the temperature difference, the second adjustment strategy is further determined based on the preset temperature range and the temperature difference, including: comparing the preset temperature range with the temperature difference to obtain the temperature difference that is not within the preset temperature range; obtaining the target position corresponding to the temperature difference that is not within the preset temperature range in each of the preset positions; and determining the second adjustment strategy based on the target position.

[0091] It is understandable that the preset temperature range and the temperature difference are compared to obtain the temperature difference that is not within the preset temperature range, and obtain the target position corresponding to the temperature difference that is not within the preset temperature range in the preset position. For example, the preset temperature range is 0-8°C, the temperature difference A is 9°C, the temperature difference A is not within the preset temperature range, and the preset position corresponding to the temperature difference A is position 1, then the target position is position 1.

[0092] In a specific implementation, after obtaining the target position that needs to be temperature-controlled, the second adjustment strategy can be determined according to the target position. The second adjustment strategy can be to add a temperature equalizer at the target position to achieve the effect of reducing the temperature difference. Other methods can also be used to reduce the temperature difference at the target position, and this embodiment does not limit this. For example, when the second adjustment strategy is to add a temperature equalizer at the target position, the updated modeling parameters are obtained, and thermal simulation is performed again based on the updated modeling parameters and the target temperature parameters to obtain thermal simulation results, and whether the temperature distribution of each preset position of the power battery meets the preset temperature is determined according to the thermal simulation results.

[0093] This embodiment performs thermal simulation based on the external temperature, power battery temperature, water inlet temperature, modeling parameters and preset thermal simulation model to obtain thermal simulation results; determines the actual temperature of each preset position in the power battery based on the thermal simulation results; obtains the preset temperature of each preset position; and determines the second adjustment strategy based on the actual temperature and the preset temperature. By performing thermal simulation based on the external temperature, power battery temperature, water inlet temperature, modeling parameters and preset thermal simulation model to obtain simulation results to determine the second adjustment strategy, the accuracy of the customization of the second adjustment strategy can be improved, thereby ensuring the high performance and safety of the subsequent power battery.

[0094] In addition, refer to Figure 4 The embodiment of the present invention further provides a thermal management device for a power battery, the thermal management device for the power battery comprising:

[0095] An acquisition module 10 is used to acquire modeling parameters and target temperature parameters of the power battery;

[0096] A determination module 20, configured to determine a flow distribution ratio according to the modeling parameters;

[0097] The determination module 20 is further configured to determine a first adjustment strategy according to the modeling parameters and the flow distribution ratio;

[0098] The determination module 20 is further configured to determine a second adjustment strategy according to the target temperature parameter and the modeling parameter;

[0099] The management module 30 is used to perform thermal management on the power battery according to the first adjustment strategy and the second adjustment strategy.

[0100] This embodiment obtains the modeling parameters and target temperature parameters of the power battery; determines the flow distribution ratio according to the modeling parameters; determines the first adjustment strategy according to the modeling parameters and the flow distribution ratio; determines the second adjustment strategy according to the target temperature parameters and the modeling parameters; and performs thermal management on the power battery according to the first adjustment strategy and the second adjustment strategy. In the above manner, the first adjustment strategy and the second adjustment strategy corresponding to the current power battery are determined by the modeling parameters and the target temperature parameters of the power battery, and the structure of the power battery is adjusted based on the first adjustment strategy and the second adjustment strategy, so that accurate thermal management of the power battery can be achieved, while ensuring the high efficiency of thermal management, the uniformity of the power battery temperature, and the consistency of the battery performance, providing safety guarantees for subsequent driving safety, and improving the user experience.

[0101] In one embodiment, the determination module 20 is further used to determine the number of battery cells according to the modeling parameters;

[0102] The flow distribution ratio is determined according to the number of battery cells.

[0103] In one embodiment, the determination module 20 is further used to perform traffic simulation according to the modeling parameters and a preset traffic simulation model to obtain a traffic simulation result;

[0104] Determine the actual flow ratio according to the flow simulation result;

[0105] A first adjustment strategy is determined according to the actual flow ratio and the flow distribution ratio.

[0106] In one embodiment, the determination module 20 is further configured to determine the flow difference ratio according to the actual flow ratio and the flow distribution ratio;

[0107] When the flow difference ratio is not within the preset flow range, determining the water inlet size and the water outlet size according to the modeling parameters;

[0108] A first adjustment strategy is determined according to the actual flow ratio, the flow distribution ratio, the water inlet size, and the water outlet size.

[0109] In one embodiment, the determination module 20 is further used to perform thermal simulation according to the ambient temperature, the power battery temperature, the water inlet temperature, the modeling parameters and the preset thermal simulation model to obtain a thermal simulation result;

[0110] Determining the actual temperature of each preset position in the power battery according to the thermal simulation result;

[0111] Acquiring a preset temperature at each of the preset positions;

[0112] A second adjustment strategy is determined according to the actual temperature and the preset temperature.

[0113] In one embodiment, the determination module 20 is further configured to determine a temperature difference between the actual temperature and the preset temperature;

[0114] A second adjustment strategy is determined according to the preset temperature range and the temperature difference.

[0115] In one embodiment, the determination module 20 is further configured to compare the preset temperature range with the temperature difference value to obtain a temperature difference value that is not within the preset temperature range;

[0116] Acquire, in each of the preset positions, a target position corresponding to the temperature difference value that is not within the preset temperature range;

[0117] A second adjustment strategy is determined according to the target position.

[0118] Since the present device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0119] In addition, an embodiment of the present invention further provides a storage medium, on which a thermal management program for a power battery is stored. When the thermal management program for the power battery is executed by a processor, the steps of the thermal management method for the power battery described above are implemented.

[0120] Since the storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0121] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0122] In addition, for technical details not fully described in this embodiment, reference can be made to the thermal management method for a power battery provided in any embodiment of the present invention, and will not be repeated here.

[0123] In addition, it should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0124] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0125] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0126] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A thermal management method for a power battery, characterized in that: The thermal management method of the power battery comprises: Acquire a modeling parameter and a target temperature parameter of the power battery, wherein the target temperature parameter includes at least one of an ambient temperature, a power battery temperature, and a water inlet temperature; Determining a flow distribution ratio according to the modeling parameters; Determining a first adjustment strategy according to the modeling parameters and the flow distribution ratio, wherein the first adjustment strategy is to adjust the diameters of the water inlet and the water outlet of the power battery; Determining a second adjustment strategy according to the target temperature parameter and the modeling parameter, wherein the second adjustment strategy is to add a temperature averaging plate at the target position where temperature control adjustment is required; Performing thermal management on the power battery according to the first adjustment strategy and the second adjustment strategy; Wherein, determining the second adjustment strategy according to the target temperature parameter and the modeling parameter includes: Perform thermal simulation according to the external temperature, the power battery temperature, the water inlet temperature, the modeling parameters and the preset thermal simulation model to obtain a thermal simulation result; Determining the actual temperature of each preset position in the power battery according to the thermal simulation result; Acquiring a preset temperature at each of the preset positions; determining a second adjustment strategy according to the actual temperature and the preset temperature; Wherein, determining the flow distribution ratio according to the modeling parameters includes: Determine the number of battery cells according to the modeling parameters; The flow distribution ratio is determined according to the number of battery cells.

2. The thermal management method of a power battery according to claim 1, characterized in that: The determining of the first adjustment strategy according to the modeling parameter and the traffic distribution ratio includes: Perform flow simulation according to the modeling parameters and the preset flow simulation model to obtain a flow simulation result; Determine the actual flow ratio according to the flow simulation result; A first adjustment strategy is determined according to the actual flow ratio and the flow distribution ratio.

3. The thermal management method of a power battery according to claim 2, characterized in that: The determining of the first adjustment strategy according to the actual flow ratio and the flow distribution ratio includes: Determining a flow difference ratio according to the actual flow ratio and the flow distribution ratio; When the flow difference ratio is not within the preset flow range, determining the water inlet size and the water outlet size according to the modeling parameters; A first adjustment strategy is determined according to the actual flow ratio, the flow distribution ratio, the water inlet size, and the water outlet size.

4. The thermal management method of a power battery according to claim 3, characterized in that: The determining the second adjustment strategy according to the actual temperature and the preset temperature includes: determining a temperature difference between the actual temperature and the preset temperature; A second adjustment strategy is determined according to the preset temperature range and the temperature difference.

5. The thermal management method of a power battery according to claim 4, characterized in that: The determining the second adjustment strategy according to the preset temperature range and the temperature difference includes: Comparing the preset temperature range with the temperature difference value, and obtaining a temperature difference value that is not within the preset temperature range; Acquire, in each of the preset positions, a target position corresponding to the temperature difference value that is not within the preset temperature range; A second adjustment strategy is determined according to the target position.

6. A thermal management device for a power battery, characterized in that: The thermal management device of the power battery comprises: An acquisition module, used to acquire a modeling parameter and a target temperature parameter of a power battery, wherein the target temperature parameter includes at least one of an ambient temperature, a power battery temperature, and a water inlet temperature; A determination module, used to determine the flow distribution ratio according to the modeling parameters; The determination module is further used to determine a first adjustment strategy according to the modeling parameters and the flow distribution ratio, wherein the first adjustment strategy is to adjust the diameters of the water inlet and the water outlet of the power battery; The determination module is further used to determine a second adjustment strategy according to the target temperature parameter and the modeling parameter, wherein the second adjustment strategy is to add a temperature averaging plate at the target position where temperature control adjustment is required; a management module, configured to perform thermal management on the power battery according to the first adjustment strategy and the second adjustment strategy; The determination module is further used to perform thermal simulation according to the external temperature, the power battery temperature, the water inlet temperature, the modeling parameters and the preset thermal simulation model to obtain a thermal simulation result; determine the actual temperature of each preset position in the power battery according to the thermal simulation result; obtain the preset temperature of each preset position; and determine a second adjustment strategy according to the actual temperature and the preset temperature; The determination module is further used to determine the number of battery cells according to the modeling parameters; and determine the flow distribution ratio according to the number of battery cells.

7. A thermal management device for a power battery, characterized in that: The device comprises: a memory, a processor, and a thermal management program for a power battery stored in the memory and executable on the processor, wherein the thermal management program for the power battery is configured to implement the thermal management method for a power battery according to any one of claims 1 to 5.

8. A storage medium, characterized in that: The storage medium stores a thermal management program for a power battery, and when the thermal management program for the power battery is executed by the processor, the thermal management method for a power battery according to any one of claims 1 to 5 is implemented.

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