Battery liquid cooling plate determination method, battery module and electronic equipment

Abstract

The invention discloses a battery liquid cooling plate determination method, a battery module and electronic equipment, and belongs to the technical field of new energy batteries. The battery liquid cooling plate determination method comprises the following steps: based on a first geometric parameter of a battery pack and a second geometric parameter of a battery cell in a battery pack under the battery pack, determining a size parameter of a battery liquid cooling plate matched with the battery pack; based on the battery type and the battery capacity of the power battery, determining the coating type of a heat insulation layer on the battery liquid cooling plate; based on the coating type and the electrical parameters corresponding to the power battery, determining the coating thickness of the heat insulation layer on the battery liquid cooling plate; and determining a target type corresponding to the battery liquid cooling plate based on the size parameters of the battery liquid cooling plate, the coating type of the thermal insulation layer and the coating thickness of the thermal insulation layer. According to the embodiment provided by the invention, the heat insulation property of the power battery cell is improved.

Description

Technical Field

[0001] The present application relates to the technical field of new energy batteries, and in particular to a method for determining a battery liquid cooling plate, a battery module and an electronic device. Background Art

[0002] At present, with the increasing number of new energy electric vehicles, their safety issues are becoming increasingly prominent. New energy electric vehicles generally use lithium-ion batteries as their power source. Once thermal runaway of the power battery occurs and there are insufficient protective measures, the runaway battery cell will instantly ignite the surrounding battery cells, causing thermal runaway of the entire battery pack, which may threaten the user's life in severe cases. Therefore, in order to ensure the safety of users, how to improve the thermal insulation of the battery cell is a problem that needs to be solved. Summary of the invention

[0003] The embodiments of the present application provide a method for determining a battery liquid cooling plate, a battery module and an electronic device. The embodiments provided by the present application solve the technical problem of poor thermal insulation of battery cells in the prior art. The embodiments provided by the present application improve the thermal insulation of power battery cells.

[0004] In a first aspect of an embodiment of the present application, an embodiment of the present application provides a method for determining a battery liquid cooling plate, wherein the battery liquid cooling plate is fixedly installed inside a battery pack of a preset power battery, and an outer surface of the battery liquid cooling plate is sprayed with a heat insulation layer, the battery pack includes a plurality of battery packs, each of the battery packs includes a plurality of battery cells, and the battery liquid cooling plate is electrically connected to the plurality of battery cells, and the method for determining the battery liquid cooling plate includes:

[0005] Determining a size parameter of a battery liquid cooling plate matching the battery pack based on a first geometric parameter of the battery pack and a second geometric parameter of the battery cell in the battery pack under the battery pack;

[0006] Determining a coating type of the thermal insulation layer on the battery liquid cooling plate based on a battery type of the power battery and a battery capacity of the power battery;

[0007] Determining a coating thickness of the thermal insulation layer on the battery liquid cooling plate based on the coating type and electrical parameters corresponding to the power battery;

[0008] Based on the size parameters of the battery liquid cooling plate, the coating type of the thermal insulation layer, and the coating thickness of the thermal insulation layer, a target type corresponding to the battery liquid cooling plate is determined.

[0009] In a feasible implementation manner, the first geometric parameter includes a spatial volume parameter, the second geometric parameter includes a battery cell size, and determining the size parameter of the battery liquid cooling plate matching the battery pack based on the first geometric parameter of the battery pack and the second geometric parameter of the battery cell in the battery pack under the battery pack includes:

[0010] Based on the spatial volume parameters of the battery pack, determining the initial size parameters of the battery liquid cooling plate matching the battery pack;

[0011] If the size deviation between the initial size parameter of the battery liquid cooling plate and the cell size of the battery cell in the battery group under the battery pack does not exceed the preset deviation threshold, determining that the size parameter of the battery liquid cooling plate matching the battery pack is the first size;

[0012] If the size deviation between the initial size parameter of the battery liquid cooling plate and the cell size of the battery cell in the battery group under the battery pack exceeds a preset deviation threshold, the size parameter of the battery liquid cooling plate matching the battery pack is determined to be a second size.

[0013] In a feasible implementation manner, the coating type includes an aluminum oxide ceramic layer, an aluminum oxide titanium ceramic layer, and a zirconium oxide ceramic layer, and the determining the coating type of the thermal insulation layer on the battery liquid cooling plate based on the battery type of the power battery and the battery capacity of the power battery includes:

[0014] If the battery type of the power battery is a high temperature resistant battery, then based on the battery capacity of the high temperature resistant battery, determine that the coating type of the heat insulation layer on the battery liquid cooling plate is an aluminum oxide ceramic layer and an aluminum oxide titanium ceramic layer;

[0015] If the battery type of the power battery is a battery that is not resistant to high temperatures, the coating type of the thermal insulation layer on the battery liquid cooling plate is determined to be a zirconium oxide ceramic layer, an aluminum oxide ceramic layer, and an aluminum titanium oxide ceramic layer based on the battery capacity of the high temperature resistant battery.

[0016] In a feasible implementation manner, the electrical parameter includes voltage, and determining the coating thickness of the thermal insulation layer on the battery liquid cooling plate based on the coating type and the electrical parameter corresponding to the power battery includes:

[0017] Based on each coating type and a preset coating thickness-voltage difference data table, determining the coating voltage difference corresponding to each coating type at different coating thicknesses, wherein the coating voltage difference is used to characterize the voltage difference strength resisted by different coatings;

[0018] Based on the coating voltage differences and the battery pack voltage corresponding to the power battery, the coating thickness of the oxide ceramic layer on the battery liquid cooling plate is determined.

[0019] According to a second aspect of the embodiments of the present application, there is provided a battery module, comprising a battery liquid cooling plate and a battery pack as described in the first aspect.

[0020] In a feasible implementation manner, the top and side surfaces of the battery liquid cooling plate in the battery module are sprayed with an oxide ceramic layer, and the length of the battery liquid cooling plate is equal to the length of the battery cells of the plurality of battery cells.

[0021] In a feasible implementation manner, an oxide ceramic layer is sprayed on the top of a battery liquid cooling plate in the battery module, and the length of the battery liquid cooling plate is greater than the length of the battery cells of the plurality of battery cells.

[0022] According to a third aspect of the embodiments of the present application, an embodiment of the present application provides a vehicle, comprising a battery module as described in the second aspect.

[0023] In a fourth aspect of the embodiments of the present application, the embodiments of the present application provide an electronic device, comprising: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor communicates with the memory through the bus, and the machine-readable instructions are executed by the processor to perform the steps of the method for determining the battery liquid cooling plate as described above.

[0024] In a fifth aspect of the embodiments of the present application, the embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method for determining the battery liquid cooling plate as described above are executed.

[0025] The method for determining a battery liquid cooling plate, a battery module and an electronic device provided in the embodiments of the present application, compared with the prior art, the embodiments provided in the present application determine the size parameters of a battery liquid cooling plate matching the battery pack based on the first geometric parameters of the battery pack and the second geometric parameters of the battery cells in the battery pack under the battery pack, and determine the coating type of the thermal insulation layer on the battery liquid cooling plate based on the battery type of the power battery and the battery capacity of the power battery, and then determine the coating thickness of the thermal insulation layer on the battery liquid cooling plate based on the coating type and the electrical parameters corresponding to the power battery, and finally determine the target type corresponding to the battery liquid cooling plate based on the size parameters of the battery liquid cooling plate, the coating type of the thermal insulation layer and the coating thickness of the thermal insulation layer, and then electrically connect the above-mentioned battery liquid cooling plate to the multiple battery cells in the battery pack by determining the target type of battery liquid cooling plate, thereby realizing that the multiple battery cells in each battery pack are connected to the battery liquid cooling plate at the same time, thereby improving the thermal insulation between the battery cells and reducing the possibility of heat spread between different battery cells in the same module or between different battery cells in different modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1A flowchart of a method for determining a battery liquid cooling plate provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the structure of a battery module provided in an embodiment of the present application;

[0028] Figure 3 This is one of the structural schematic diagrams of a battery liquid cooling plate in a battery module provided in an embodiment of the present application;

[0029] Figure 4 The second structural schematic diagram of a battery liquid cooling plate in a battery module provided in an embodiment of the present application;

[0030] Figure 5 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application;

[0031] Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0032] Figure 5 and Figure 6 The corresponding relationship between the reference numerals and the names of the drawings is as follows:

[0033] 10 vehicle; 200 battery module; 210 battery liquid cooling plate; 220 battery pack; 230 battery cell; 301 oxide ceramic layer; 302 first flow channel; 401 second flow channel; 500 device for determining vehicle fault; 600 electronic device; 610 processor; 620 memory; 630 bus. DETAILED DESCRIPTION

[0034] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0035] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0036] First, the applicable application scenarios of the present application are introduced. The embodiments provided in the present application are applicable to the field of new energy battery technology.

[0037] At present, with the increasing number of new energy electric vehicles, their safety issues are becoming increasingly prominent. New energy electric vehicles generally use lithium-ion batteries as their power source. Once thermal runaway of the power battery occurs and there are insufficient protective measures, the runaway battery cell will instantly ignite the surrounding battery cells, causing thermal runaway of the entire battery pack, which may threaten the user's life in severe cases. Therefore, in order to ensure the safety of users, how to improve the thermal insulation of the battery cell is a problem that needs to be solved.

[0038] However, the failure of electrical insulation between battery cells and modules will cause short circuits between battery cells in the same module or between different battery cells in different modules. In severe cases, it will cause a chain of thermal runaway of the battery cells under the impact of instantaneous and continuous large current. The chain of thermal runaway caused by the short circuit between battery cells is essentially a kind of heat diffusion. Therefore, it is necessary to reduce heat diffusion from the source of the short circuit of the battery cells and improve the thermal insulation of the battery cells.

[0039] Based on this, the embodiments of the present application provide a method for determining a battery liquid cooling plate, a battery module and an electronic device. The embodiments provided by the present application solve the technical problem of poor thermal insulation of battery cells in the prior art. The embodiments provided by the present application improve the thermal insulation of power battery cells.

[0040] Figure 1 A flow chart of a method for determining a battery liquid cooling plate provided in an embodiment of the present application, such as Figure 1 As shown. The battery liquid cooling plate is fixedly installed inside the battery pack of the preset power battery, and the outer surface of the battery liquid cooling plate is sprayed with a heat insulation layer. The battery pack includes multiple battery packs, each battery pack includes multiple battery cells, and the battery liquid cooling plate is electrically connected to the battery cells.

[0041] Exemplarily, the outer surface of the battery liquid cooling plate in the embodiment provided in the present application is sprayed with an insulating layer, which can be specifically an oxide ceramic layer, because the process of applying the oxide ceramic coating to the preparation of the positive electrode sheet of the battery cell material is relatively mature, and the oxide ceramic coating can withstand high temperatures of about hundreds to thousands, far exceeding the above-mentioned preset thermal runaway temperature of the power battery, and the Mohs hardness of the oxide ceramic coating is as high as about 9, which can withstand the forward impact of the high-temperature and high-speed flue gas generated when the battery cell is thermally runaway, thereby preventing the battery liquid cooling plate from being melted by high temperature and causing leakage; the oxide ceramic coating is wear-resistant and can withstand the lateral impact of the high-temperature and high-speed flue gas generated when the battery cell is thermally runaway, thereby preventing the coating from being washed away; the oxide ceramic coating has extremely high electrical insulation performance, and can be used as a conductive component when multiple battery cells in the battery pack are thermally runaway, thereby reducing the risk of short circuit between battery cells, and the oxide ceramic coating can also be used to block the passage between battery cells in modules when thermal runaway occurs in battery cells at different positions in different modules.

[0042] It should be noted that the oxide ceramic layer selected in the embodiments provided in the present application has good thermal conductivity and does not affect the heat exchange of the battery liquid cooling plate inside the preset power battery. The thermal conductivity coefficient of the oxide ceramic layer in the embodiments provided in the present application is specific but not limited to 20W / (m*K) or above.

[0043] The method for determining the battery liquid cooling plate includes the following steps:

[0044] S101. Determine size parameters of a battery liquid cooling plate that matches the battery pack based on first geometric parameters of the battery pack and second geometric parameters of battery cells in a battery group under the battery pack.

[0045] In this step, before determining the target type of the battery liquid cooling plate in the preset power battery pack, it is first necessary to determine the preset first geometric parameters of the battery pack to be tested and the second geometric parameters of the battery cells in the battery pack, and compare the above-mentioned first geometric parameters with the second geometric parameters to determine the comparison relationship between the two types of geometric parameters, and then determine the size parameters of the battery liquid cooling plate that matches the battery pack based on the above-mentioned comparison relationship.

[0046] It can be understood that in the embodiments provided in the present application, battery liquid cooling plates with different size parameters require different positions of the oxide ceramic coating to be sprayed subsequently.

[0047] S102: Determine a coating type of a heat insulation layer on a battery liquid cooling plate based on a battery type and a battery capacity of the power battery.

[0048] For example, power batteries of different battery types have different high temperature resistance and degrees of high temperature resistance. Therefore, the coating types of the thermal insulation layers, i.e., the oxide ceramic layers, corresponding to the power batteries of different battery types are different. And since the battery capacities of different power batteries are different, the standards and requirements for thermal runaway of different power batteries are different. Therefore, the coating types required for power batteries of different battery capacities also have different tendencies, so comprehensive consideration is needed.

[0049] It should be noted that the higher the battery capacity of the power battery in the embodiments provided in the present application, the greater the thermal shock generated when thermal failure occurs, and therefore a thermal insulation layer with better thermal insulation capability is required; on the contrary, the lower the battery capacity of the power battery, the smaller the thermal shock generated when thermal failure occurs, and therefore, the choice of thermal insulation layer type can be more diversified, without having to stick to the characteristic of high temperature resistance.

[0050] Among them, the thermal insulation layer in the embodiments provided in the present application, i.e., the oxide coating, may include but is not limited to an aluminum oxide ceramic layer with insulation and temperature resistance, or an aluminum oxide titanium ceramic layer with insulation and wear resistance, and a zirconium oxide ceramic layer with high-temperature thermal insulation performance, etc.

[0051] S103: Determine the coating thickness of the thermal insulation layer on the battery liquid cooling plate based on the coating type and electrical parameters corresponding to the power battery.

[0052] Exemplarily, after determining the coating type of the thermal insulation layer, ie, the oxide coating, in the embodiment provided in the present application, it is also necessary to determine the coating thickness of each thermal insulation layer on the battery liquid cooling plate according to the corresponding electrical parameters of the power battery.

[0053] It can be understood that the electrical parameters in the embodiments provided in the present application include voltage. After determining the corresponding coating type of the power battery, the embodiments provided in the present application determine the coating thickness corresponding to each insulation layer on the liquid cooling plate of the power battery according to the maximum voltage difference that the coating can withstand and the voltage corresponding to the above-mentioned power battery itself.

[0054] Among them, the thickness of the oxide ceramic coating in the embodiment provided in the present application is controllable, which can be specifically from several microns to tens of microns, and the oxide ceramic coating can withstand extremely high high voltages. A ceramic coating with a thickness of 10μm can withstand a high voltage of about 700V. Therefore, the oxide ceramic coating avoids the problem of insulation failure caused by high voltage breakdown of the battery cell.

[0055] S104: Determine a target type corresponding to the battery liquid cooling plate based on the size parameters of the battery liquid cooling plate, the coating type of the thermal insulation layer, and the coating thickness of the thermal insulation layer.

[0056] In the above, based on the determined size parameters of the battery liquid cooling plate, the coating type of the thermal insulation layer on the battery liquid cooling plate, and the coating thickness of the thermal insulation layer on the battery liquid cooling plate, the actual use type of the battery liquid cooling plate is selected to determine the final target type.

[0057] Exemplarily, the first geometric parameter includes a space volume parameter, the second geometric parameter includes a cell size, and step S101 includes the following sub-steps:

[0058] Sub-step 1011: Based on the spatial volume parameters of the battery pack, determine the initial size parameters of the battery liquid cooling plate that matches the battery pack.

[0059] Exemplarily, in a power battery, there are multiple battery packs with different spatial volume ratios. The embodiment provided in the present application needs to determine the initial size parameters of the battery liquid cooling plate to be used based on the actual spatial volume parameters of the above-mentioned battery pack in the power battery, and compare the initial size parameters with the cell size of the battery cell in the battery pack under the battery pack, so as to specifically determine the specific size parameters of the battery liquid cooling plate.

[0060] Sub-step 1012: If the size deviation between the initial size parameter of the battery liquid cooling plate and the cell size of the battery cell in the battery group under the battery pack does not exceed the preset deviation threshold, determine that the size parameter of the battery liquid cooling plate matching the battery pack is the first size.

[0061] Exemplarily, the preset deviation threshold in the embodiment provided in the present application can be customized and used according to different application scenarios. Assume here that the preset deviation threshold in the embodiment provided in the present application can be specifically set to 30mm. Therefore, if the size deviation between the initial size parameters of the battery liquid cooling plate and the core size of the battery cell in the battery pack under the battery pack does not exceed 30mm, then the size parameter of the battery liquid cooling plate that matches the battery pack is determined to be the first size, that is, the size deviation between the length of the battery liquid cooling plate and the core size of the battery cell in the battery pack under the battery pack does not exceed 30mm.

[0062] Sub-step 1013: If the size deviation between the initial size parameter of the battery liquid cooling plate and the cell size of the battery cell in the battery group under the battery pack exceeds the preset deviation threshold, determine that the size parameter of the battery liquid cooling plate matching the battery pack is the second size.

[0063] Exemplarily, if the dimensional deviation between the initial dimensional parameters of the battery liquid cooling plate and the core size of the battery cells in the battery pack under the battery pack exceeds 30 mm, the dimensional parameters of the battery liquid cooling plate that matches the battery pack are determined to be the second size, that is, the dimensional deviation between the length of the battery liquid cooling plate and the core size of the battery cells in the battery pack under the battery pack does not exceed 30 mm.

[0064] Exemplarily, the coating types include an aluminum oxide ceramic layer, an aluminum titanium oxide ceramic layer, and a zirconium oxide ceramic layer, and step S102 includes the following sub-steps:

[0065] Sub-step 1021: If the battery type of the power battery is a high temperature resistant battery, based on the battery capacity of the high temperature resistant battery, determine that the coating type of the thermal insulation layer on the battery liquid cooling plate is an aluminum oxide ceramic layer and an aluminum oxide titanium ceramic layer.

[0066] It should be noted that common types of power batteries on the market include but are not limited to lithium iron phosphate batteries and ternary lithium batteries, among which lithium iron phosphate batteries do not need to consider high temperature resistance characteristics; while ternary lithium batteries need to consider high temperature resistance characteristics. Therefore, the high temperature resistant battery in the embodiment provided in this application is a ternary lithium battery. After determining that the battery type of the power battery is a high temperature resistant ternary lithium battery, the degree of thermal runaway requirements of the ternary lithium battery is determined according to the battery capacity of the ternary lithium battery in actual applications, and then the coating type of the thermal insulation layer is determined to be specifically an alumina ceramic layer and an alumina titanium ceramic layer.

[0067] Sub-step 1022: If the battery type of the power battery is a battery that is not resistant to high temperatures, based on the battery capacity of the high temperature resistant battery, determine that the coating type of the insulation layer on the battery liquid cooling plate is a zirconium oxide ceramic layer, an aluminum oxide ceramic layer, and an aluminum titanium oxide ceramic layer.

[0068] It should be noted that after determining that the battery type of the power battery is a lithium iron phosphate battery that is not resistant to high temperatures, the degree of thermal runaway requirements of the lithium iron phosphate battery is determined based on the battery capacity of the lithium iron phosphate battery in actual applications, and then the coating type of the thermal insulation layer is determined to be specifically an alumina ceramic layer and an aluminum oxide titanium ceramic layer.

[0069] It should be noted that the preparation of the oxide ceramic coating on the surface of the battery liquid cooling plate in the embodiment provided in this application mainly includes the following process steps:

[0070] Step 1: The sample surface of the battery liquid cooling plate needs to be pre-treated by rounding corners and pre-fabricating coating grooves to make the workpiece surface suitable for coating deposition and increase the bonding area.

[0071] Step 2: Subsequently, solvent cleaning, alkali solution cleaning and other methods are used to remove oil stains on the surface of the workpiece to maintain cleanliness. Here, commonly used cleaning solvents on the market include gasoline, dimethyl ketone, tetrachloromethane and trichloroethylene.

[0072] Step 3: The surface of the substrate can be roughened by sandblasting, the oxide film on the surface of the substrate can be removed, and the lattice distortion of part of the surface metal can be produced, which is conducive to the physical bonding of the coating.

[0073] Step 4: Using a high temperature heat source to melt the oxide ceramic powder at high temperature, the temperature varies with the melting temperature of the oxide ceramic powder used.

[0074] Step 5: The molten ceramic powder is atomized by the impact of high-speed airflow, and sprayed onto the surface of the processed liquid cooling plate sample at a certain speed to form a coating with corrosion resistance, wear resistance, high temperature resistance and insulation properties.

[0075] Exemplarily, the electrical parameter includes voltage, and step S103 includes the following sub-steps:

[0076] Sub-step 1031, based on each coating type and a preset coating thickness-voltage difference data table, determining the coating voltage difference corresponding to each coating type at different coating thicknesses, wherein the coating voltage difference is used to characterize the voltage difference strength that different coatings resist.

[0077] Exemplarily, in the embodiments provided in the present application, it is necessary to determine the coating voltage differences corresponding to different oxide coatings at different coating thicknesses based on a preset coating thickness-voltage difference data table.

[0078] Sub-step 1032: determining the coating thickness of the oxide ceramic layer on the battery liquid cooling plate based on the voltage difference of each coating layer and the battery pack voltage corresponding to the power battery.

[0079] For example, after determining the coating voltage difference corresponding to different oxide coatings at different coating thicknesses, it is necessary to determine the coating thickness of the oxide ceramic layer on the battery liquid cooling plate based on the voltage of the battery pack corresponding to the power battery in the actual application scenario.

[0080] The method for determining the battery liquid cooling plate in the embodiment provided by the present application, compared with the prior art, the embodiment provided by the present application determines the size parameters of the battery liquid cooling plate matching the battery pack based on the first geometric parameters of the battery pack and the second geometric parameters of the battery cells in the battery group under the battery pack, and determines the coating type of the thermal insulation layer on the battery liquid cooling plate based on the battery type of the power battery and the battery capacity of the power battery, and then determines the coating thickness of the thermal insulation layer on the battery liquid cooling plate based on the coating type and the electrical parameters corresponding to the power battery, and finally determines the target type corresponding to the battery liquid cooling plate based on the size parameters of the battery liquid cooling plate, the coating type of the thermal insulation layer and the coating thickness of the thermal insulation layer, and by determining the battery liquid cooling plate of the target type, the above-mentioned battery liquid cooling plate is electrically connected to the multiple battery cells in the battery pack, thereby realizing that the multiple battery cells in each battery pack are connected to the battery liquid cooling plate at the same time, thereby improving the thermal insulation between the battery cells and reducing the possibility of heat spread between different battery cells in the same module or between different battery cells in different modules.

[0081] See also Figure 2 , Figure 2A schematic diagram of the structure of a battery module provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the battery module 200 includes a battery liquid cooling plate 210 and a battery pack 220, the battery pack 220 includes a plurality of battery groups, each battery group includes a plurality of battery cells 230, the battery liquid cooling plate 210 is fixedly installed inside the battery pack 220 of a preset power battery, and the battery liquid cooling plate 210 is electrically connected to the plurality of battery cells 230.

[0082] Here, whether two battery cells 230 in the battery module 200 are connected through the battery liquid cooling plate 210 after thermal runaway occurs, or two battery cells 230 between the battery modules 200 are connected through the liquid cooling plate after thermal runaway occurs, the battery liquid cooling plate 210 needs to be installed inside the battery pack 220 of the preset power battery, and an insulating oxide ceramic coating needs to be sprayed on the surface of the battery liquid cooling plate 210, so that the short-circuit path of the battery cells 230 of the battery module 200 will be blocked, so as to prevent heat diffusion of the battery cells 230 between the battery modules 200.

[0083] For example, see Figure 3 , Figure 3 This is one of the structural schematic diagrams of a battery liquid cooling plate 210 in a battery module 200 provided in an embodiment of the present application, such as Figure 3 As shown, the top and side surfaces of the battery liquid cooling plate 210 in the battery module 200 are sprayed with an oxide ceramic layer 301, and the length of the battery liquid cooling plate 210 is equal to the length of the battery cells 230 of the plurality of battery cells 230, and a first flow channel 302 is opened inside the battery liquid cooling plate 210.

[0084] For example, see Figure 4 , Figure 4 This is a second structural schematic diagram of a battery liquid cooling plate 210 in a battery module 200 provided in an embodiment of the present application, as shown in FIG. Figure 4 As shown, an oxide ceramic layer 301 is sprayed on the top of the battery liquid cooling plate 210 in the battery module 200 , and the length of the battery liquid cooling plate 210 is greater than the length of the battery cells 230 of the plurality of battery cells 230 , and a second flow channel 401 is opened inside the battery liquid cooling plate 210 .

[0085] Among them, the length of the battery liquid cooling plate 210 in the embodiment provided in the present application is greater than the length of the battery cells 230 of the plurality of battery cells 230 and is greater than or equal to 30 mm.

[0086] See also Figure 5 , Figure 5 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application is shown in FIG. Figure 5 As shown, the vehicle 10 includes a battery module 200 mounted thereon.

[0087] See also Figure 6 , Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application is shown in FIG. Figure 6 As shown, the electronic device 600 includes a processor 610 , a memory 620 , and a bus 630 .

[0088] The memory 620 stores machine-readable instructions executable by the processor 610. When the electronic device 600 is running, the processor 610 communicates with the memory 620 via the bus 630. When the machine-readable instructions are executed by the processor 610, the above-mentioned Figure 1 The steps of the method for determining the battery liquid cooling plate in the method embodiment shown and the specific implementation thereof can be referred to the method embodiment, which will not be described in detail here.

[0089] The present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the computer program can execute the above-mentioned Figure 1 The steps of the method for determining the battery liquid cooling plate in the method embodiment shown and the specific implementation thereof can be referred to the method embodiment, which will not be described in detail here.

[0090] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0091] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0092] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-readable program code.

[0093] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0094] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0095] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0096] An embodiment of the present application further provides a computer program product, which includes computer software instructions. When the computer software instructions are executed on a processing device, the processing device executes the process of the method for determining a battery liquid cooling plate.

[0097] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable devices. The computer instruction can be stored in a computer-readable storage medium, or transmitted from a computer-readable storage medium to another computer-readable storage medium. For example, the computer instruction can be transmitted from a website site, a computer, a server or a data center by wired (for example, coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (for example, infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a server, a data center, etc. that includes one or more available media integration. Available media can be magnetic media, (for example, floppy disk, hard disk, tape), optical media (for example, DVD), or semiconductor media (for example, solid-state disk (solidstate disk, SSD)) and the like.

[0098] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0099] In the several embodiments provided in the present application, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0100] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0101] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0102] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program codes.

[0103] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0104] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0105] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A method for determining a battery liquid cooling plate, characterized in that: The battery liquid cooling plate is fixedly installed inside a preset battery pack of a power battery, and a heat insulation layer is sprayed on the outer surface of the battery liquid cooling plate. The battery pack includes a plurality of battery packs, each of which includes a plurality of battery cells, and the battery liquid cooling plate is electrically connected to the plurality of battery cells. The method for determining the battery liquid cooling plate includes: Determining a size parameter of a battery liquid cooling plate matching the battery pack based on a first geometric parameter of the battery pack and a second geometric parameter of the battery cell in the battery pack under the battery pack; Determining a coating type of the thermal insulation layer on the battery liquid cooling plate based on a battery type of the power battery and a battery capacity of the power battery; Determining a coating thickness of the thermal insulation layer on the battery liquid cooling plate based on the coating type and electrical parameters corresponding to the power battery; Based on the size parameters of the battery liquid cooling plate, the coating type of the thermal insulation layer, and the coating thickness of the thermal insulation layer, a target type corresponding to the battery liquid cooling plate is determined.

2. The method for determining a battery liquid cooling plate according to claim 1, characterized in that: The first geometric parameter includes a space volume parameter, the second geometric parameter includes a battery cell size, and determining the size parameter of the battery liquid cooling plate matching the battery pack based on the first geometric parameter of the battery pack and the second geometric parameter of the battery cell in the battery pack under the battery pack includes: Based on the spatial volume parameters of the battery pack, determining the initial size parameters of the battery liquid cooling plate matching the battery pack; If the size deviation between the initial size parameter of the battery liquid cooling plate and the cell size of the battery cell in the battery group under the battery pack does not exceed the preset deviation threshold, determining that the size parameter of the battery liquid cooling plate matching the battery pack is the first size; If the size deviation between the initial size parameter of the battery liquid cooling plate and the cell size of the battery cell in the battery group under the battery pack exceeds a preset deviation threshold, the size parameter of the battery liquid cooling plate matching the battery pack is determined to be a second size.

3. The method for determining a battery liquid cooling plate according to claim 1, characterized in that: The coating types include an aluminum oxide ceramic layer, an aluminum oxide titanium ceramic layer, and a zirconium oxide ceramic layer. The determining the coating type of the thermal insulation layer on the battery liquid cooling plate based on the battery type of the power battery and the battery capacity of the power battery includes: If the battery type of the power battery is a high temperature resistant battery, then based on the battery capacity of the high temperature resistant battery, determine that the coating type of the heat insulation layer on the battery liquid cooling plate is an aluminum oxide ceramic layer and an aluminum oxide titanium ceramic layer; If the battery type of the power battery is a battery that is not resistant to high temperatures, the coating type of the thermal insulation layer on the battery liquid cooling plate is determined to be a zirconium oxide ceramic layer, an aluminum oxide ceramic layer, and an aluminum titanium oxide ceramic layer based on the battery capacity of the high temperature resistant battery.

4. The method for determining a battery liquid cooling plate according to claim 3, characterized in that: The electrical parameter includes voltage, and determining the coating thickness of the thermal insulation layer on the battery liquid cooling plate based on the coating type and the electrical parameter corresponding to the power battery includes: Based on each coating type and a preset coating thickness-voltage difference data table, determining the coating voltage difference corresponding to each coating type at different coating thicknesses, wherein the coating voltage difference is used to characterize the voltage difference strength resisted by different coatings; Based on the coating voltage differences and the battery pack voltage corresponding to the power battery, the coating thickness of the oxide ceramic layer on the battery liquid cooling plate is determined.

5. A battery module, characterized in that: It comprises a battery liquid cooling plate and a battery pack as described in any one of claims 1 to 4.

6. The battery module according to claim 5, characterized in that: The top and side surfaces of the battery liquid cooling plate in the battery module are sprayed with an oxide ceramic layer, and the length of the battery liquid cooling plate is equal to the length of the battery cells of the plurality of battery cells.

7. The battery module according to claim 5, characterized in that: An oxide ceramic layer is sprayed on the top of the battery liquid cooling plate in the battery module, and the length of the battery liquid cooling plate is greater than the length of the battery cells of the plurality of battery cells.

8. A vehicle, characterized in that: It comprises a battery module installed with any one of claims 5-7.

9. An electronic device, characterized in that: include: A processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate through the bus, and the machine-readable instructions are executed by the processor to perform the steps of the method for determining a battery liquid cooling plate as described in any one of claims 1 to 4.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for determining a battery liquid cooling plate as described in any one of claims 1 to 4 are executed.

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