Heat dissipation performance analysis method of battery, electronic equipment and high-capacity battery

Abstract

The embodiment of the invention discloses a heat dissipation performance analysis method of a battery, electronic equipment and a high-capacity battery. According to the method, a first temperature field of a first battery and a second temperature field of a second battery are determined, the difference between the first battery and the second battery is that the first battery is not provided with a vapor chamber, the second battery is provided with a vapor chamber, and then the first temperature field and the second temperature field are obtained according to the first temperature field and the second temperature field. The heat dissipation performance of the second battery is analyzed to obtain the heat dissipation performance information of the second battery, so that the heat dissipation performance of the battery after the soaking plate is arranged in the battery can be quickly and accurately tested, the design scheme of the soaking plate in the battery can be adjusted in time, the developed battery is ensured to have good heat dissipation performance, and the service life of the battery is prolonged. The development period of the battery is shortened, and the development cost of the battery is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a method for analyzing the heat dissipation performance of a battery, an electronic device, and a high-capacity battery. Background Technology

[0002] High-capacity, high-charge-rate batteries not only significantly improve driving range and charging efficiency but also meet the demands of instantaneous high-power output. However, high-capacity, high-charge-rate batteries all face high-temperature rise during use, which is detrimental to battery performance. Vapor chambers (VCs) can be integrated into the battery, utilizing their efficient thermal conductivity to achieve uniform heat distribution and rapid heat dissipation within the battery, thereby improving battery safety, extending lifespan, and optimizing overall battery performance. However, ensuring good heat dissipation performance after the vapor chamber is integrated remains a pressing technical challenge. Summary of the Invention

[0003] This application provides a method for analyzing the heat dissipation performance of a battery, an electronic device, and a large-capacity battery. It can quickly and accurately test the heat dissipation performance of a battery with a built-in heat spreader, so as to adjust the design of the heat spreader inside the battery in a timely manner, ensuring that the developed battery has good heat dissipation performance, shortening the battery development cycle, and reducing the battery development cost.

[0004] In a first aspect, embodiments of this application provide a method for analyzing the heat dissipation performance of a battery, comprising:

[0005] Determine the first temperature field of the first battery and the second temperature field of the second battery; the difference between the first battery and the second battery is that the first battery is not equipped with a heat spreader, while the second battery is equipped with a heat spreader.

[0006] Based on the first and second temperature fields, the heat dissipation performance of the second battery is analyzed to obtain the heat dissipation performance information of the second battery.

[0007] Secondly, embodiments of this application provide a battery heat dissipation performance analysis device, which includes:

[0008] A determining unit is used to determine the first temperature field of the first battery and the second temperature field of the second battery; the difference between the first battery and the second battery is that the first battery is not equipped with a heat spreader, while the second battery is equipped with a heat spreader.

[0009] The analysis unit is used to analyze the heat dissipation performance of the second battery based on the first temperature field and the second temperature field, and obtain the heat dissipation performance information of the second battery.

[0010] Thirdly, embodiments of this application provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the battery heat dissipation performance analysis method provided in the first aspect above.

[0011] Fourthly, embodiments of this application also provide a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform the battery heat dissipation performance analysis method provided in the first aspect.

[0012] Fifthly, embodiments of this application also provide a computer program product, including a computer program or instructions, which are executed by a processor to provide the battery heat dissipation performance analysis method provided in the first aspect.

[0013] Sixthly, embodiments of this application also provide a high-capacity battery, which is analyzed using the heat dissipation performance analysis method for batteries provided in the first aspect. The battery includes:

[0014] At least one core package;

[0015] At least one heat spreader is provided on at least one surface of the core package.

[0016] Furthermore, in the battery provided in this application, the heat spreader includes an L-shaped heat spreader, which includes a first heat spreader section and a second heat spreader section. The first heat spreader section is disposed on the bottom surface of the core pack, and the second heat spreader section is disposed on the side or inside of the core pack; or / and,

[0017] The heat spreader includes a linear heat spreader, which is located on the side or bottom of the core package;

[0018] The battery includes at least two cell packs and at least one heat spreader; adjacent sides or bottom surfaces of the two cell packs are cooled by at least one heat spreader.

[0019] This application provides a method for analyzing the heat dissipation performance of a battery. By determining the first temperature field of a first battery and the second temperature field of a second battery, the difference between the first and second batteries is that the first battery is not equipped with a heat spreader, while the second battery is equipped with a heat spreader. Then, based on the first and second temperature fields, the heat dissipation performance of the second battery is analyzed to obtain its heat dissipation performance information. This allows for rapid and accurate testing of the heat dissipation performance of the battery after the heat spreader is built in, enabling timely adjustments to the design of the heat spreader inside the battery. This ensures that the developed battery has good heat dissipation performance, shortens the battery development cycle, and reduces the battery development cost. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a first structural schematic diagram of a battery provided in an embodiment of this application;

[0022] Figure 2 This is a first structural schematic diagram of a heat spreader provided in an embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the second structure of the heat spreader provided in an embodiment of this application;

[0024] Figure 4 This is a schematic diagram of the second structure of the battery provided in an embodiment of this application;

[0025] Figure 5 A schematic diagram of the third structure of the battery provided in an embodiment of this application;

[0026] Figure 6 A fourth structural schematic diagram of the battery provided in an embodiment of this application;

[0027] Figure 7 A fifth structural schematic diagram of the battery provided in an embodiment of this application;

[0028] Figure 8 A flowchart illustrating the battery heat dissipation performance analysis method provided in this application embodiment;

[0029] Figure 9 Temperature field distribution diagram of the first battery provided in the embodiments of this application;

[0030] Figure 10 Temperature field distribution diagram of the second battery provided in the embodiments of this application;

[0031] Figure 11 A schematic block diagram of a battery heat dissipation performance analysis device provided in an embodiment of this application;

[0032] Figure 12 A schematic block diagram of an electronic device provided in an embodiment of this application.

[0033] Figure label:

[0034] 100. Core package; 101. Straight heat spreader; 102. L-shaped heat spreader; 1021. First heat spreader section; 1022. Second heat spreader section; 103. Top cover; 104. Aluminum shell. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0037] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0038] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0039] Furthermore, in this application, unless otherwise explicitly specified or limited in the embodiments, the terms "installation," "connection," "joining," and "fixing" appearing in the embodiments should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can also be a mechanical connection, an electrical connection, etc. Of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication between two components, or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific implementation.

[0040] The embodiments of this application provide a method for analyzing the heat dissipation performance of a battery, an electronic device, and a high-capacity battery.

[0041] To facilitate understanding, we will first introduce large-capacity batteries, and then, based on this, detail the methods for analyzing the heat dissipation performance of batteries.

[0042] Please see Figure 1 , Figure 1 This is a first structural schematic diagram of a battery provided in an embodiment of this application. Figure 1As shown, the high-capacity battery can be a square battery or a large cylindrical battery. The battery's internal core pack 100 can be wrapped with an aluminum shell 104, and a top cover 103 is provided on the top of the core pack 100.

[0043] To effectively cool large-capacity batteries while ensuring good temperature uniformity in the cell pack 100, this application incorporates a vapor chamber (VC) plate inside the battery. The vapor chamber boasts exceptionally high thermal conductivity, significantly exceeding that of traditional materials like copper and aluminum. For instance, the vapor chamber's thermal conductivity can reach over 10,000 W / (m·K), more than 25 times that of copper. Furthermore, the vapor chamber can be several millimeters thick or even thinner, thus meeting the lightweight requirements of batteries and other devices. This allows the battery to achieve excellent heat dissipation and temperature uniformity without increasing its weight or volume.

[0044] In some embodiments, such as Figure 2 As shown, the heat spreader includes an L-shaped heat spreader 102, which includes a first heat spreader 1021 and a second heat spreader 1022. The first heat spreader 1021 is disposed on the bottom surface of the core package 100, and the second heat spreader 1022 is disposed on the side or inside of the core package 100.

[0045] In some embodiments, such as Figure 3 As shown, the heat spreader includes a linear heat spreader, which is disposed on the side or bottom surface of the core package 100.

[0046] In some embodiments, the high-capacity battery includes at least two cell packs 100 and at least one heat spreader; adjacent sides or bottom surfaces of the two cell packs 100 are cooled by at least one heat spreader.

[0047] Specifically, the large-capacity battery can have two cell packs 100 and two L-shaped heat spreaders 102 inside, and the two L-shaped heat spreaders 102 can be placed between the two cell packs 100 to obtain... Figure 4 The battery structure shown has two L-shaped heat dissipation plates 102 with their second heat dissipation portions 1022 disposed between the two core packs 100, one L-shaped heat dissipation plate 102 with its first heat dissipation portion 1021 disposed on the bottom surface of one core pack 100, and the other L-shaped heat dissipation plate 102 with its first heat dissipation portion 1021 disposed on the bottom surface of the other core pack 100.

[0048] Alternatively, a large-capacity battery can internally house two cell packs 100 and two L-shaped heat spreaders 102. The second heat spreader portion 1022 of one L-shaped heat spreader 102 is located inside one cell pack 100, and the first heat spreader portion 1021 of the L-shaped heat spreader 102 is located on the bottom surface of the cell pack 100. The second heat spreader portion 1022 of the other L-shaped heat spreader 102 is located inside the other cell pack 100, and the first heat spreader portion 1021 of the L-shaped heat spreader 102 is located on the bottom surface of the cell pack 100, thereby achieving... Figure 5 The battery structure shown.

[0049] Alternatively, the high-capacity battery can internally consist of two cell packs 100 and three linear heat spreaders 101. The first linear heat spreader 101 is located on the side of one cell pack 100 away from the other cell pack 100, the second linear heat spreader 101 is located between the two cell packs 100, and the third linear heat spreader 101 is located on the side of the other cell pack 100 away from the first cell pack 100, to achieve... Figure 6 The battery structure shown.

[0050] Alternatively, the large-capacity battery can internally consist of two cell packs 100, a linear heat spreader 101, and two L-shaped heat spreaders 102. The second heat spreader portion 1022 of the first L-shaped heat spreader 102 can be located on the side of one cell pack 100 away from the other cell pack 100, the linear heat spreader 101 can be located between the two cell packs 100, and the second L-shaped heat spreader 102 can be located on the side of the other cell pack 100 away from the first cell pack 100, to achieve... Figure 7 The battery structure shown.

[0051] In related technologies, when installing a heat spreader inside a large-capacity battery, orthogonal experiments are typically used to determine the optimal heat spreader placement. This involves employing heat spreaders of various structures and placing them at different locations within the battery to obtain various battery structures. Simultaneously, the heat dissipation and temperature uniformity performance of each battery are tested to determine the optimal heat spreader placement within the battery. However, the process of testing the heat dissipation and temperature uniformity performance of these batteries requires conducting actual performance tests on each battery individually, which is not only time-consuming but also costly, thus leading to a prolonged battery development cycle.

[0052] Therefore, this application provides a method for analyzing the heat dissipation performance of a battery. By determining the first temperature field of a first battery and the second temperature field of a second battery, the difference between the first and second batteries is that the first battery is not equipped with a heat spreader, while the second battery is equipped with a heat spreader. Then, based on the first and second temperature fields, the heat dissipation performance of the second battery is analyzed to obtain the heat dissipation performance information of the second battery. This allows for rapid and accurate testing of the heat dissipation performance of the battery after the heat spreader is built in, so as to adjust the design of the heat spreader inside the battery in a timely manner, ensuring that the developed battery has good heat dissipation performance, shortening the battery development cycle, and reducing the battery development cost.

[0053] It should be noted that the application scenarios described in the following embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0054] The following is a detailed description of the heat dissipation performance analysis method of the battery provided in this application.

[0055] like Figure 8 As shown, the method includes the following steps S210 to S220.

[0056] S210. Determine the first temperature field of the first battery and the second temperature field of the second battery; the difference between the first battery and the second battery is that the first battery is not equipped with a heat spreader, while the second battery is equipped with a heat spreader.

[0057] S220. Based on the first temperature field and the second temperature field, perform heat dissipation performance analysis on the second battery to obtain heat dissipation performance information of the second battery.

[0058] In this application, the first temperature field refers to the spatial distribution of the internal and surface temperatures of the first battery, and the second temperature field refers to the spatial distribution of the internal and surface temperatures of the second battery. The difference between the first and second batteries is that the first battery is not equipped with a heat spreader, while the second battery is equipped with a heat spreader, which has extremely high thermal conductivity and can effectively dissipate heat from the battery. Therefore, the first and second temperature fields are different.

[0059] Specifically, in determining the first and second temperature fields, this application can employ either measurement or simulation methods. When using measurement methods, sensors such as thermocouples and infrared thermal imagers can be used to measure the battery's temperature field. Thermocouples can measure the temperature at multiple points inside and on the surface of the battery, while infrared thermal imagers can quickly and non-contactly acquire images of the temperature distribution on the battery surface. When using simulation methods, a thermal model of the battery, such as an overcurrent thermal simulation model, can be established, and numerical simulation methods such as finite element analysis can be used to predict the battery's temperature field. Simultaneously, the simulation needs to consider factors such as the battery's material parameters, geometry, charging and discharging conditions, and ambient temperature.

[0060] In this embodiment, after determining the first temperature field of the first battery and the second temperature field of the second battery, the heat dissipation performance of the second battery can be analyzed based on the first and second temperature fields to obtain the heat dissipation performance information of the second battery. Specifically, during the heat dissipation performance analysis of the second battery, the first temperature field of the first battery can be used as comparative data to analyze the heat dissipation efficiency and temperature uniformity efficiency of the second battery.

[0061] In some embodiments, in S210, a first overcurrent thermal simulation model of the first battery and a second overcurrent thermal simulation model of the second battery can be constructed respectively; a first temperature field is determined based on the first overcurrent thermal simulation model, and a second temperature field is determined based on the second overcurrent thermal simulation model.

[0062] Specifically, overcurrent thermal simulation models are important tools for studying the temperature changes and thermal runaway behavior of batteries under overcurrent conditions. Their main purpose is to predict the thermal behavior of batteries under different operating conditions through simulation, thereby providing theoretical basis and technical support for battery design, safety management, and thermal management. Overcurrent thermal simulation models are typically based on the finite element method (FEM) or computational fluid dynamics (CFD) techniques, combining multi-physics coupling such as electrochemical reactions, heat transfer, and mechanical stress for modeling. Simulation tools can include ANSYS Fluent, COMSOL Multiphysics, and Open FOAM, among others.

[0063] In this application, the difference between the first and second current-flow thermal simulation models lies in the fact that the first current-flow thermal simulation model does not include parameters related to the heat spreader. After constructing the first current-flow thermal simulation model for the first battery and the second current-flow thermal simulation model for the second battery, this application can determine the first temperature field based on the first current-flow thermal simulation model and the second temperature field based on the second current-flow thermal simulation model. Therefore, by analyzing the heat dissipation performance of the second battery based on the first and second temperature fields, the heat dissipation performance information of the second battery can be obtained.

[0064] The distribution of the first battery in the first temperature field can be as follows: Figure 9 The temperature field on the left side of the image can be represented by the first temperature field after the first battery has discharged at 25℃@1P for 3600s. Figure 9 The temperature field on the left side can be the temperature field of the core pack of the first battery after the outer casing is removed; the distribution of the second temperature field of the second battery is as follows. Figure 10 The temperature field on the left; the second temperature field can be the temperature field of the second battery after discharging at 25℃@1P for 3600s. Figure 9 The temperature field on the left side can be the temperature field of the core pack of the second battery after the outer casing is removed.

[0065] In some embodiments, constructing a first overcurrent thermal simulation model for the first battery and a second overcurrent thermal simulation model for the second battery includes: constructing a first geometric model of the first battery based on the structural parameters of the first battery, and constructing a second geometric model of the second battery based on the structural parameters of the second battery; converting the first geometric model into a first overcurrent thermal model based on the performance parameters of the first battery, and converting the second geometric model into a second overcurrent thermal model based on the performance parameters of the second battery.

[0066] Specifically, the structural parameters of the first battery include its external dimensions (such as length, width, and height), electrode dimensions and positions, electrolyte distribution area, and membrane thickness and position. The dimensions, shape, and installation position of the heat spreader also need to be recorded. The structural parameters of the second battery include the external dimensions of the first battery, electrode dimensions and positions, electrolyte distribution area, and membrane thickness and position. Furthermore, since the first battery does not have a heat spreader, other structural differences between the second and first batteries should be noted, such as internal space distribution.

[0067] In this application, the geometric model is a crucial foundation for studying battery performance, optimizing design, and performing simulation analysis. In constructing the first and second geometric models, this application utilizes 3D modeling software (such as SolidWorks, CATIA, etc.) or the geometric modeling tools built into simulation software to construct the first and second geometric models based on collected structural parameters. It is important to note that this application requires accurately drawing the geometry of each component of the first and second batteries, including the casing, electrodes, electrolyte, and separator, and adding the geometry of the heat spreader to the corresponding position in the model. This ensures that the dimensions and positions of each component are consistent with the actual battery.

[0068] Furthermore, after constructing the first geometric model and the second geometric model, the first geometric model can be converted into a first flow-through thermal model based on the performance parameters of the first battery, and the second geometric model can be converted into a second flow-through thermal model based on the performance parameters of the second battery.

[0069] Specifically, in the process of converting the first geometric model and the second geometric model into the first current-temperature model and the second current-temperature model, respectively, the performance parameters of the first battery and the second battery can be imported into the simulation software. The performance parameters of the first battery and the second battery include the battery's internal resistance, charging and discharging current, rated capacity, maximum allowable temperature, etc.

[0070] Furthermore, after the performance parameters of the first and second batteries are imported into the simulation software, corresponding material properties can be assigned to each component in the first and second geometric models. Specifically, based on the actual materials of each component in the first and second batteries, their thermal conductivity, specific heat capacity, density, and other thermophysical parameters can be determined. For the heat spreader in the second battery, its high thermal conductivity and other characteristics need to be set to reflect its good thermal conductivity performance.

[0071] Furthermore, after assigning corresponding material properties to each component in the first and second geometric models, the Joule heat generation rate inside the first and second batteries can be calculated based on the charging and discharging current and internal resistance of the first and second batteries. The calculated Joule heat generation rate is then used as a heat source and applied to the corresponding parts such as the electrodes of the first and second batteries. The generation of internal heat in the first and second batteries under overcurrent conditions is simulated to define the heat source for the first and second batteries.

[0072] Furthermore, after defining the heat sources for the first and second batteries, boundary conditions between the first and second batteries and the external environment are set, such as ambient temperature and convective heat transfer coefficient. The convective heat transfer coefficient can be estimated based on the battery's heat dissipation method (natural convection, forced convection, etc.) or determined experimentally. Simultaneously, initial temperatures for the first and second batteries need to be set as their initial conditions; these are typically the ambient temperatures when the first and second batteries are not in operation.

[0073] Furthermore, after setting the boundary conditions and initial conditions for the first and second batteries, an overcurrent thermal coupling model can be established in the simulation software to couple and solve the multi-physics field equations such as the current conduction equation and heat conduction equation of the first and second batteries. Then, by solving the coupling model, the temperature field distribution of the first and second batteries under overcurrent conditions can be obtained, namely the first overcurrent thermal model and the second overcurrent thermal model.

[0074] In some embodiments, the heat dissipation performance of the second battery is analyzed based on the first temperature field and the second temperature field to obtain heat dissipation performance information of the second battery, including: determining the first temperature rise of the first battery based on the first temperature field, and determining the second temperature rise of the second battery based on the second temperature field; and determining the cooling efficiency of the second battery based on the first temperature rise and the second temperature rise.

[0075] In this embodiment, the heat dissipation performance information may include cooling efficiency, which can be determined by the first temperature rise of the first battery and the second temperature rise of the second battery. The first temperature rise can be understood as the overall temperature rise of the first battery, and the second temperature rise can be understood as the overall temperature rise of the second battery. The formula for calculating the overall temperature rise is as follows:

[0076] ΔT=T max -T0

[0077] Where ΔT is the overall temperature rise; T max T0 represents the battery's highest temperature, which can be obtained from the temperature field; T0 can be understood as the battery's initial temperature when it is not in operation, typically the ambient temperature of 25°C.

[0078] Furthermore, after determining the first temperature rise of the first battery and the second temperature rise of the second battery, the cooling efficiency of the second battery can be determined using the first and second temperature rises, which can be calculated using the following formula:

[0079]

[0080] Where α is the cooling efficiency, ΔTVC is the first temperature rise, and ΔTVC is the first temperature rise. VC This is the second temperature rise.

[0081] In some embodiments, the heat dissipation performance of the second battery is analyzed based on the first temperature field and the second temperature field to obtain heat dissipation performance information of the second battery, including: determining the first upper and lower temperature difference of the first battery based on the first temperature field, and determining the second upper and lower temperature difference of the second battery based on the second temperature field; and determining the cooling efficiency of the second battery based on the first upper and lower temperature difference and the second upper and lower temperature difference.

[0082] In this embodiment, the heat dissipation performance information may further include temperature uniformity efficiency, which can be determined based on a first upper and lower temperature difference and a second upper and lower temperature difference. The first upper and lower temperature difference can be understood as the temperature difference between the upper and lower surfaces of the first battery, and the second temperature rise can be understood as the temperature difference between the upper and lower surfaces of the second battery. The formula for calculating the upper and lower temperature differences is as follows:

[0083] T difference =T 1# -T 2#

[0084] Among them, T difference The temperature difference between the top and bottom; T 1# The highest, average, or lowest temperature at the top of the battery, which can be obtained from the temperature field; T 2# This can be understood as the highest, average, or lowest temperature at the bottom of the battery.

[0085] Furthermore, after determining the first and second temperature differences, the uniform temperature efficiency of the second battery can be determined using the first and second temperature differences, which can be calculated using the following formula:

[0086]

[0087] Where β is the temperature uniformity efficiency. The first temperature difference is between the top and bottom. This is the second temperature difference between the upper and lower parts.

[0088] In some embodiments, the method for analyzing the heat dissipation performance of a battery further includes: determining a third temperature field of a third battery; the difference between the third battery and the second battery is that the position and / or number of heat spreaders between the second battery and the third battery are different; and performing heat dissipation performance analysis on the third battery based on the first temperature field and the third temperature field to obtain heat dissipation performance information of the third battery.

[0089] In this application, the location and number of heat spreaders inside the battery may differ. This application can determine the third temperature field of the third battery. The difference between the third battery and the second battery lies in the different locations and / or numbers of heat spreaders between the second and third batteries. Therefore, the heat dissipation performance of the third battery can be analyzed based on the first and third temperature fields to obtain the heat dissipation performance information of the third battery. Then, by comparing the heat dissipation performance information between the second and third batteries, it can be determined whether the heat dissipation performance of the second battery is better than that of the third battery, thereby determining the optimal solution for the placement of the heat spreaders inside the battery.

[0090] In some embodiments, after analyzing the heat dissipation performance of the third battery based on the first temperature field and the third temperature field to obtain the heat dissipation performance information of the third battery, the method further includes: determining the configuration scheme of the heat spreader in the battery based on the heat dissipation performance information of the second battery and the heat dissipation performance information of the third battery.

[0091] Specifically, this application can determine whether the battery adopts the heat sink design scheme of the second battery or the heat sink design scheme of the third battery by comparing the difference in cooling efficiency and / or temperature uniformity between the first battery and the third battery, so as to achieve the best battery performance.

[0092] It should be noted that this application can set heat spreaders in multiple batteries with the same structure. The number and position of heat spreaders inside each battery can be adjusted. Then, the heat dissipation performance analysis method of the battery provided in this application is used to analyze the heat dissipation performance of each battery and compare them to determine the optimal design scheme of the heat spreader inside the battery.

[0093] For example, this application can be applied to a battery (first battery) without a heat spreader. Figure 4 , Figure 5 , Figure 6 and Figure 7 The heat dissipation performance of the batteries (second, third, fourth, and fifth batteries, respectively) was analyzed, and the results are shown in Table 1.

[0094] Table 1

[0095] / First Battery Second battery Third battery Fourth battery Fifth Battery Temperature rise 22.7℃ 13.7℃ 12.9℃ 11.4℃ 10.7℃ Cooling efficiency / 39.6％ 43.2％ 49.8％ 52.9％ Temperature difference between top and bottom 11.1℃ 6.0℃ 5.4℃ 5.3℃ 3.6℃ Temperature Efficiency / 45.9％ 51.4％ 52.3％ 67.6％

[0096] As can be seen from Table 1, the cooling efficiency and temperature equalization efficiency of the battery were significantly improved after a heat spreader was installed inside the battery. Figure 7 The design scheme of setting a heat spreader in the middle can significantly improve the cooling efficiency and temperature uniformity of the battery, thus determining that among the second, third, fourth and fifth batteries, the fifth battery has the best heat dissipation performance.

[0097] In the battery heat dissipation performance analysis method provided in this application embodiment, a first temperature field of the first battery and a second temperature field of the second battery are determined. The difference between the first battery and the second battery is that the first battery is not equipped with a heat spreader, while the second battery is equipped with a heat spreader. Then, based on the first temperature field and the second temperature field, the heat dissipation performance of the second battery is analyzed to obtain the heat dissipation performance information of the second battery. This allows for rapid and accurate testing of the heat dissipation performance of the battery after the heat spreader is built in, so as to adjust the design scheme of the heat spreader inside the battery in a timely manner, ensuring that the developed battery has good heat dissipation performance, shortening the battery development cycle, and reducing the battery development cost.

[0098] This application also provides a battery heat dissipation performance analysis device 300, which is used to perform any embodiment of the aforementioned battery heat dissipation performance analysis method.

[0099] Specifically, please refer to Figure 11 , Figure 11 This is a schematic block diagram of the battery heat dissipation performance analysis device 300 provided in the embodiments of this application.

[0100] like Figure 11 As shown, the battery heat dissipation performance analysis device 300 provided in this application includes a determination unit 310 and an analysis unit 320.

[0101] The determining unit 310 is used to determine the first temperature field of the first battery and the second temperature field of the second battery; the difference between the first battery and the second battery is that the first battery is not equipped with a heat spreader, while the second battery is equipped with a heat spreader; the analyzing unit 320 is used to analyze the heat dissipation performance of the second battery based on the first temperature field and the second temperature field, and obtain the heat dissipation performance information of the second battery.

[0102] The battery heat dissipation performance analysis device 300 provided in this application embodiment determines a first temperature field of a first battery and a second temperature field of a second battery. The difference between the first and second batteries is that the first battery is not equipped with a heat spreader, while the second battery is equipped with a heat spreader. Then, based on the first and second temperature fields, the heat dissipation performance of the second battery is analyzed to obtain the heat dissipation performance information of the second battery. This allows for rapid and accurate testing of the heat dissipation performance of the battery after the heat spreader is built in, so as to adjust the design scheme of the heat spreader inside the battery in a timely manner, ensuring that the developed battery has good heat dissipation performance, shortening the battery development cycle, and reducing the battery development cost.

[0103] It should be noted that those skilled in the art can clearly understand that the specific implementation process of the above-mentioned battery heat dissipation performance analysis device 300 and each unit can be referred to the corresponding description in the foregoing method embodiments. For the sake of convenience and brevity, it will not be repeated here.

[0104] The aforementioned battery heat dissipation performance analysis device 300 can be implemented as a computer program, which can, for example... Figure 12 It runs on the electronic device shown.

[0105] Please see Figure 12 , Figure 12 This is a schematic block diagram of the electronic device provided in the embodiments of this application.

[0106] See Figure 12 The device 400 includes a processor 402, a memory, and a network interface 405 connected via a system bus 401, wherein the memory may include a storage medium 403 and internal memory 404.

[0107] The storage medium 403 may store an operating system 4031 and a computer program 4032. When the computer program 4032 is executed, it enables the processor 402 to perform a method for analyzing the heat dissipation performance of the battery.

[0108] The processor 402 provides computing and control capabilities to support the operation of the entire device 400.

[0109] The internal memory 404 provides an environment for the operation of the computer program 4032 in the non-volatile storage medium 403. When the computer program 4032 is executed by the processor 402, the processor 402 can execute a method for analyzing the heat dissipation performance of the battery.

[0110] This network interface 405 is used for network communication, such as providing data transmission. Those skilled in the art will understand that... Figure 12 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the device 400 to which the present application is applied. The specific device 400 may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0111] The processor 402 is used to run the computer program 4032 stored in the memory to perform the following functions: determine the first temperature field of the first battery and the second temperature field of the second battery; the difference between the first battery and the second battery is that the first battery is not equipped with a heat spreader, while the second battery is equipped with a heat spreader; and perform heat dissipation performance analysis on the second battery based on the first temperature field and the second temperature field to obtain heat dissipation performance information of the second battery.

[0112] Those skilled in the art will understand that Figure 12 The embodiments of device 400 shown do not constitute a limitation on the specific configuration of device 400. In other embodiments, device 400 may include more or fewer components than shown, or combine certain components, or have different component arrangements. For example, in some embodiments, device 400 may include only memory and processor 402. In such embodiments, the structure and function of memory and processor 402 are similar to those shown. Figure 12 The embodiments shown are consistent and will not be described again here.

[0113] It should be understood that in the embodiments of this application, the processor 402 may be a central processing unit (CPU), or it may be other general-purpose processors 402, digital signal processors 502 (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor 402 may be a microprocessor 402, or it may be any conventional processor 402, etc.

[0114] According to one aspect of this application, a computer program product or computer program is also provided, comprising computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the following steps: determining a first temperature field of a first battery and a second temperature field of a second battery; the difference between the first and second batteries is that the first battery is not equipped with a heat spreader, while the second battery is equipped with a heat spreader; and performing a heat dissipation performance analysis on the second battery based on the first and second temperature fields to obtain heat dissipation performance information of the second battery.

[0115] It will be understood by those skilled in the art that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program includes program instructions and can be stored in a storage medium, which is a computer-readable storage medium. The program instructions are executed by at least one processor in the computer system to implement the process steps of the embodiments of the above methods.

[0116] In another embodiment of this application, a computer storage medium is provided. This storage medium can be a non-volatile computer-readable storage medium or a volatile storage medium. The storage medium stores a computer program 4032, which, when executed by a processor 402, performs the following steps: determining a first temperature field of a first battery and a second temperature field of a second battery; the difference between the first and second batteries is that the first battery is not equipped with a heat spreader, while the second battery is equipped with a heat spreader; and analyzing the heat dissipation performance of the second battery based on the first and second temperature fields to obtain heat dissipation performance information of the second battery.

[0117] The storage medium can be any computer-readable storage medium that can store program code, such as a USB flash drive, external hard drive, read-only memory (ROM), magnetic disk, or optical disk.

[0118] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0119] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For example, the division of each unit is merely a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0120] The steps in the methods of this application embodiment can be adjusted, merged, or deleted according to actual needs. The units in the apparatus of this application embodiment can be merged, divided, or deleted according to actual needs. Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0121] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of this application, in essence, 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. This computer software product is stored in a storage medium and includes several instructions to cause an electronic device (which may be a personal computer, a terminal, or a network device, etc.) to execute all or part of the steps of the methods provided in the various embodiments of this application.

[0122] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for analyzing the heat dissipation performance of a battery, characterized in that, include: Determine the first temperature field of the first battery and the second temperature field of the second battery; The difference between the first battery and the second battery is that the first battery is not equipped with a heat spreader, while the second battery is equipped with the heat spreader. Based on the first temperature field and the second temperature field, the heat dissipation performance of the second battery is analyzed to obtain the heat dissipation performance information of the second battery.

2. The method for analyzing the heat dissipation performance of a battery according to claim 1, characterized in that, Determining the first temperature field of the first battery and the second temperature field of the second battery includes: A first overcurrent thermal simulation model for the first battery and a second overcurrent thermal simulation model for the second battery are constructed respectively. The first temperature field is determined based on the first flow thermal simulation model, and the second temperature field is determined based on the second flow thermal simulation model.

3. The method for analyzing the heat dissipation performance of a battery according to claim 2, characterized in that, The construction of the first overcurrent thermal simulation model for the first battery and the second overcurrent thermal simulation model for the second battery includes: A first geometric model of the first battery is constructed based on the structural parameters of the first battery, and a second geometric model of the second battery is constructed based on the structural parameters of the second battery. The first geometric model is converted into the first flow-through thermal model based on the performance parameters of the first battery, and the second geometric model is converted into the second flow-through thermal model based on the performance parameters of the second battery.

4. The method for analyzing the heat dissipation performance of a battery according to claim 1, characterized in that, The step of analyzing the heat dissipation performance of the second battery based on the first temperature field and the second temperature field to obtain the heat dissipation performance information of the second battery includes: The first temperature rise of the first battery is determined based on the first temperature field, and the second temperature rise of the second battery is determined based on the second temperature field; The cooling efficiency of the second battery is determined based on the first temperature rise and the second temperature rise.

5. The method for analyzing the heat dissipation performance of a battery according to claim 1, characterized in that, The step of analyzing the heat dissipation performance of the second battery based on the first temperature field and the second temperature field to obtain the heat dissipation performance information of the second battery includes: The first temperature difference between the upper and lower parts of the first battery is determined based on the first temperature field, and the second temperature difference between the upper and lower parts of the second battery is determined based on the second temperature field. The uniform temperature efficiency of the second battery is determined based on the first and second temperature differences between the upper and lower surfaces.

6. The method for analyzing the heat dissipation performance of a battery according to any one of claims 1-5, characterized in that, The method further includes: A third temperature field is determined for the third battery; the third battery differs from the second battery in that the position and / or number of heat spreaders between the second and third batteries are different. Based on the first temperature field and the third temperature field, the heat dissipation performance of the third battery is analyzed to obtain the heat dissipation performance information of the third battery.

7. The method for analyzing the heat dissipation performance of a battery according to claim 6, characterized in that, After performing heat dissipation performance analysis on the third battery based on the first temperature field and the third temperature field to obtain the heat dissipation performance information of the third battery, the method further includes: Based on the heat dissipation performance information of the second battery and the heat dissipation performance information of the third battery, the configuration scheme of the heat spreader in the battery is determined.

8. An electronic device, characterized in that, The device includes a memory and a processor, the memory storing a computer program, characterized in that the processor executes the computer program to implement the steps of the method for analyzing the heat dissipation performance of a battery according to any one of claims 1 to 7.

9. A high-capacity battery, characterized in that, The heat dissipation performance of the battery is analyzed using the method described in any one of claims 1-7, wherein the high-capacity battery comprises: At least one core package; At least one heat spreader is disposed on at least one surface of the core package.

10. The high-capacity battery according to claim 9, characterized in that, The heat spreader includes an L-shaped heat spreader, which includes a first heat spreader section and a second heat spreader section. The first heat spreader section is disposed on the bottom surface of the core package, and the second heat spreader section is disposed on the side or inside of the core package; or / and, The heat spreader includes a linear heat spreader, which is disposed on the side or bottom surface of the core package; The battery includes at least two of the said cell packs and at least one heat spreader; adjacent sides or bottom surfaces of the two said cell packs are cooled by at least one of the said heat spreaders.

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