Battery design method, battery, electronic device, and storage medium

Abstract

The application discloses a battery design method, a battery, an electronic device and a storage medium. The method comprises the following steps: obtaining a battery three-dimensional model corresponding to a pressure relief flow channel of each different design scheme, wherein the pressure relief flow channel comprises a gas passage in communication with an explosion-proof valve inside the battery; performing flow field simulation on the pressure relief flow channel based on each battery three-dimensional model, so as to obtain a safety performance parameter corresponding to each design scheme, wherein the safety performance parameter is used for representing the safety performance of the battery; and determining a target design scheme based on the safety performance parameter corresponding to each design scheme, wherein the safety performance parameter satisfies a preset condition. The three-dimensional flow field simulation is performed on each design scheme, so that a battery design scheme with safety performance meeting the requirement is selected, and the safety performance of the battery is ensured.

Description

Technical Field

[0001] This application relates to the field of battery safety design technology, specifically to a battery design method, a battery, an electronic device, and a storage medium. Background Technology

[0002] In the context of carbon neutrality, the energy storage industry is accelerating its shift from policy-driven to market-driven growth, but safety remains a key bottleneck restricting its development. As the basic unit of electrochemical energy storage systems, batteries are increasingly favored by the market for larger capacity products. Industry experts point out that the larger the battery, the higher the risk of thermal runaway accidents. Therefore, the safety design of large-capacity batteries is particularly important. Internal flow channel design to guide the premature release of gases and heat caused by abuse scenarios such as electrical and mechanical misuse, thus preventing the accumulation of large amounts of gas and heat, is currently an effective method for designing high-safety, large-capacity batteries.

[0003] Therefore, how to design effective internal flow channels in batteries to improve battery safety performance is a technical problem that urgently needs to be solved. Summary of the Invention

[0004] This application provides a battery design method, a battery, an electronic device, and a storage medium. By performing three-dimensional flow field simulation on various design schemes, a battery design scheme that meets the safety performance requirements can be selected to ensure battery safety performance.

[0005] On one hand, embodiments of this application provide a battery design method, the method comprising: Obtain the three-dimensional battery model corresponding to the pressure relief channel of each different design scheme. The pressure relief channel includes a gas channel that communicates with the explosion-proof valve inside the battery. Based on the three-dimensional models of each battery, flow field simulation of the pressure relief channel is performed to obtain the safety performance parameters corresponding to each design scheme. The safety performance parameters are used to characterize the safety performance of the battery. Based on the safety performance parameters corresponding to each of the design schemes, a target design scheme is determined that the safety performance parameters meet the preset conditions.

[0006] On the other hand, this application provides a battery in which the design of the pressure relief channel is determined by the above-mentioned battery design method. The battery includes a core pack, a shell and an explosion-proof valve, and the core pack and the shell form a pressure relief channel that communicates with the explosion-proof valve.

[0007] On the other hand, embodiments of this application provide an electronic device, which includes a processor and a memory. The memory stores a computer program, and the processor executes the battery design method as described in any of the above embodiments by calling the computer program stored in the memory.

[0008] On the other hand, embodiments of this application provide a computer-readable storage medium storing a computer program adapted for loading by a processor to execute the battery design method as described in any of the above embodiments.

[0009] The battery design method, battery, electronic device, and storage medium provided in this application establish a three-dimensional battery model of the pressure relief channel with different design schemes. Then, based on the three-dimensional battery model, flow field simulation of the pressure relief channel connected to the explosion-proof valve in the battery is performed to obtain the flow field simulation results of the three-dimensional battery model corresponding to different design schemes, thereby determining the safety performance parameters characterizing the safety performance of the battery corresponding to each design scheme.

[0010] Finally, based on the safety performance parameters corresponding to each design scheme, the target design scheme that meets the safety performance requirements is determined.

[0011] In this way, simulation can quickly find the target design scheme that meets the safety performance requirements among various design schemes. Moreover, by introducing fluid dynamics and the flow field simulation realized by the battery three-dimensional model, the accuracy of the safety performance parameters can be guaranteed, thereby ensuring that the target design scheme meets the safety performance requirements. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of an example battery design system provided in an embodiment of this application.

[0014] Figure 2 This is a first flowchart illustrating the battery design method provided in an embodiment of this application.

[0015] Figure 3 This is an exploded perspective view of a battery provided in one embodiment of this application.

[0016] Figure 4 This is a schematic diagram of a battery cross-section obtained by cutting the plane of the side plate of the vertical housing provided in one embodiment of this application.

[0017] Figure 5 This is an exploded perspective view of a battery provided in another embodiment of this application.

[0018] Figure 6A schematic diagram of a battery cross-section obtained by cutting the plane of the side plate of the vertical housing provided in another embodiment of this application.

[0019] Figure 7 This is an exploded perspective view of a battery provided in another embodiment of this application.

[0020] Figure 8 This is a schematic diagram of a battery cross-section obtained by cutting the plane of the side plate of the vertical housing provided in another embodiment of this application.

[0021] Figure 9 This is a second flowchart illustrating the battery design method provided in an embodiment of this application.

[0022] Figure 10 This is a schematic diagram illustrating a scenario of the battery design method provided in an embodiment of this application.

[0023] Figure 11 This is a schematic diagram of the battery design device provided in an embodiment of this application.

[0024] Figure 12 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0025] 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, and 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.

[0026] This application provides a battery design method, apparatus, storage medium, device, and program product. Specifically, the battery design method of this application can be executed by an electronic device, which can be a terminal or server, etc.

[0027] The terminal can be a smartphone, tablet, laptop, smart TV, wearable smart device, smart vehicle terminal, etc. The terminal can also include a client, which can be a game client, browser client, instant messaging client, or mini-program, etc.

[0028] A server can be a standalone physical server, a server cluster or distributed system consisting of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, content delivery networks (CDN), and big data and artificial intelligence platforms.

[0029] It should be noted that in the embodiments of this application, the execution subject of the battery design method can be a terminal device or a server, and the embodiments of this application do not limit the type of execution subject.

[0030] It is understood that in the specific implementation of this application, user object data, context data and other related data are involved. When the embodiments of this application are applied to specific products or technologies, user permission or consent is required, and the collection, use and processing of related data must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0031] For example, in conjunction with the above description, Figure 1 This application illustrates a battery design system 1000 for implementing a battery design method, as provided in an embodiment. The battery design system 1000 may include at least one terminal 1001, at least one server 1002, at least one database 1003, and a network. The terminal 1001 can connect to different servers via the network. The terminal can be any device with computing hardware capable of supporting and executing software applications corresponding to games.

[0032] Furthermore, when the battery design system 1000 includes multiple terminals, multiple servers, and multiple networks, different terminals can connect to each other through different networks and servers. The network can be a wireless network or a wired network, such as a wireless local area network (WLAN), local area network (LAN), cellular network, 2G network, 3G network, 4G network, 5G network, etc. Additionally, different terminals can also connect to other terminals or to servers using their own Bluetooth networks or hotspot networks. Furthermore, the system 100 can include multiple databases coupled to different servers, and can continuously store game-related information in the databases while different users are playing multiplayer games online.

[0033] It should be noted that, Figure 1 The schematic diagram of the battery design system shown is merely an example. The battery design system 1000 described in this application embodiment is intended to more clearly illustrate the technical solutions of this application embodiment and does not constitute a limitation on the technical solutions provided in this application embodiment. As those skilled in the art will know, with the evolution of battery design systems and the emergence of new business scenarios, the technical solutions provided in this application embodiment are also applicable to similar technical problems.

[0034] The technical solution of this application will be described in detail below through specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0035] Please see Figure 2 It should be noted that the steps shown may be performed in a logical order different from that shown in the flowchart of this method. The battery design method of this application may include the following steps: Step 011: Obtain the 3D model of the battery corresponding to the pressure relief channel of each different design scheme. The pressure relief channel includes a gas channel that is connected to the inside of the battery and the explosion-proof valve.

[0036] The pressure relief channel is a passage for the gas generated by thermal runaway when the battery experiences thermal runaway. The pressure relief channel is connected to an explosion-proof valve, so that when there is too much thermal runaway gas and the pressure in the pressure relief channel is too high, the pressure is released through the explosion-proof valve to reduce the risk of thermal runaway.

[0037] Among them, the pressure relief channel with different design schemes refers to the battery design scheme with different materials, structures, etc. of at least one component that affects the pressure relief channel.

[0038] A battery is an electrochemical device that can convert chemical energy into electrical energy. For example, based on shape, a battery can be a square battery or a cylindrical battery. Based on chemical composition, a battery can be a lithium-ion battery or a sodium-ion battery.

[0039] Among them, the battery 3D model is a 3D model obtained by performing 3D modeling on the battery.

[0040] It is understandable that, in order to find the optimal design, we can first construct three-dimensional models of the battery under different design schemes of pressure relief channels to facilitate subsequent simulation.

[0041] Please see Figure 3 and Figure 4 In one optional embodiment, the battery 10 includes a core pack 11, a housing 13, and an explosion-proof valve 14, wherein the core pack 11 and the housing 13 form a pressure relief channel 15 communicating with the explosion-proof valve 14.

[0042] Among them, the battery core pack refers to the core reaction component of the battery formed by winding or stacking positive electrode plates, negative electrode plates and separators, which is the main body for lithium ion insertion / extraction, transport and electrochemical reaction.

[0043] Among them, the explosion-proof valve is a pressure relief protection device installed on the battery casing or cover plate. It is used to open under a preset pressure threshold when high pressure gas is generated inside the battery due to abnormal conditions such as thermal runaway. The gas is discharged in a direction through the flow channel to reduce the internal pressure of the battery and prevent the casing from bursting or causing more serious safety accidents.

[0044] The design scheme of the pressure relief channel in this application may include a variety of options. Three of them are described below as examples, which are not intended to limit this application.

[0045] (1) Side patch thickness adjustment scheme Please continue reading. Figure 3 and Figure 4 In an alternative embodiment, the battery 10 further includes a side patch 12 disposed on the side of the core pack 11.

[0046] Among them, the side tape (Side Insulation Tape) is an insulating and protective tape that is attached to the side of the battery cell pack. It is used to isolate the side of the cell and prevent short circuits between the terminals. At the same time, the side tape also has the effects of fixing the electrode group, assisting thermal management and mechanical protection. It is a key component in battery safety and assembly.

[0047] Among them, the thickness of the side patch directly affects the effective flow cross-sectional area of ​​the pressure relief channel between the core and the inner wall of the shell, thereby changing the gas flow rate, pressure loss and boundary pressure at the explosion-proof valve in the channel, and finally forming a quantitative correspondence between the thickness of the side patch and safety performance parameters such as the battery's thermal runaway pressure relief capacity and internal pressure buildup.

[0048] Side patches are attached to the sides of the battery pack, forming a pressure relief channel between the side patches and the inner wall of the battery casing for the flow of thermal runaway gases. The thickness of the side patches affects the flow field of the pressure relief channel.

[0049] After constructing a 3D model of the battery with any side patch thickness, by adjusting the side patch thickness of the model, 3D models of batteries with different side patch thicknesses can be quickly constructed with high efficiency. In this way, battery design schemes corresponding to different side patch thicknesses can be obtained quickly.

[0050] It is understandable that when building a 3D model, at least the components that form the pressure relief channel among the various parts of the battery should be built to ensure the accuracy of the subsequent flow field simulation of the pressure relief channel.

[0051] In one optional embodiment, the housing 13 includes a first top cover 131, a side plate 132, and a second top cover 133. The first top cover 131 and the second top cover 133 are disposed opposite to each other. The side plate 132 connects the first top cover 131 and the second top cover 133. The side of the core package 11 is disposed opposite to the side plate 132.

[0052] In one alternative embodiment, the core package 11 has two opposing first sides and two opposing second sides, and side patches 12 are disposed on the two first sides and / or the two second sides.

[0053] In an alternative embodiment, the explosion-proof valve 14 is disposed on the first top cover 131 or the second top cover 133.

[0054] It is understandable that the explosion-proof valve 14 can be set on the same side as the terminal of the core pack 11, or it can be set on the opposite side of the terminal of the core pack 11, in order to adapt to the needs of different types of batteries and thermal runaway handling.

[0055] (2) Slotting scheme for the inner wall of the shell Please see Figure 5 and Figure 6 In one optional embodiment, a guide groove 1321 is provided on the inner wall of the side plate 132, and the guide groove 1321 is connected to the explosion-proof valve 14.

[0056] In this way, by opening the flow channel, after the cell generates gas due to thermal runaway, the gas does not run wildly. Instead, it can converge and flow in a directional manner along the flow channel to the explosion-proof valve. Furthermore, the flow channel can be combined with the gap of the side patch to achieve precise control of airflow resistance, pressure, and flow rate, which is beneficial to improving the battery safety performance.

[0057] In one optional embodiment, the flow channel 1321 includes a plurality of channels, which are spaced apart and extend along the direction from the first top cover 131 to the second top cover 133.

[0058] In this way, the flow channel 1321 directs the airflow along the direction from the first top cover 131 to the second top cover 133, allowing the gas generated by thermal runaway to be quickly guided to the explosion-proof valve, thereby improving the battery safety performance.

[0059] (3) Core packing interlayer with a support structure with through slots Please see Figure 7 and Figure 8 In one optional embodiment, the core pack 11 includes a first core pack 111 and a second core pack 112, and the battery 10 also includes a bracket 16, which is disposed between the first core pack 111 and the second core pack 112. The bracket 16 has a through groove 161 extending from the first top cover 131 to the second top cover 133 and communicating with the explosion-proof valve 14.

[0060] Thus, by setting a support in the interlayer between the first and second core packages, and opening a through groove in the support extending from the first top cover to the second top cover and connecting to the explosion-proof valve, the high-temperature and high-pressure gas and high-temperature flue gas generated by the thermal runaway of the core packages on both sides can flow into the through groove during thermal runaway. The through groove collects and guides the gas to the explosion-proof valve, avoiding local pressure buildup and accumulation of gas in one side of the shell. This achieves pressure balance in the full pressure relief channel, which is beneficial to increase the upper limit of gas pressure at the explosion-proof valve while ensuring that the battery does not rupture.

[0061] In addition, the through slot can also achieve physical isolation between the first core package and the second core package, preventing thermal runaway from spreading after one core package experiences thermal runaway.

[0062] Step 012: Based on the three-dimensional models of each battery, perform flow field simulation of the pressure relief channel to obtain the safety performance parameters corresponding to each design scheme. The safety performance parameters are used to characterize the safety performance of the battery.

[0063] Among them, safety performance parameters are parameters that characterize the safety performance of the battery.

[0064] In one optional embodiment, the safety performance parameters include the gas pressure and gas flow rate at the explosion-proof valve. It is understood that the safety performance parameters are generally critical values, representing the parameters that trigger the opening of the explosion-proof valve.

[0065] The higher the upper limit of gas pressure at the explosion-proof valve, the greater the gas pressure required for the battery's internal pressure to burst the casing, and the higher the battery's safety. The upper limit of gas flow rate at the explosion-proof valve reflects whether thermal runaway gas can be discharged quickly and smoothly. The greater the gas flow rate, the faster the gas can flow out after the explosion-proof valve is opened, and the higher the battery's safety.

[0066] Therefore, the gas pressure and gas flow rate at the explosion-proof valve together determine the critical values ​​for battery explosion, fire, and uncontrolled jetting, thus directly characterizing safety performance.

[0067] Among them, flow field simulation refers to the numerical simulation of the flow process of high temperature and high pressure gas in the pressure relief channel during battery thermal runaway based on computational fluid dynamics (CFD) method. By solving the fluid control equations, the pressure distribution, velocity distribution, streamline distribution and flow characteristics inside the channel are obtained. This is used to evaluate the flow guiding capacity, exhaust smoothness and pressure relief efficiency of the pressure relief channel, and to provide quantitative basis for channel structure optimization and battery safety performance verification.

[0068] Specifically, after obtaining the three-dimensional models of each battery, flow field simulation can be performed on the pressure relief channel of the battery to simulate the flow field of the pressure relief channel, thereby determining the safety performance parameters corresponding to each three-dimensional battery model.

[0069] Please see Figure 9 In one optional embodiment, step 012 includes: Step 0121: Assign physical property parameters to the gas in the pressure relief channel. The physical property parameters include at least one of the following: gas density, dynamic viscosity coefficient, specific heat capacity, and thermal conductivity. Step 0122: Set the boundary conditions of the pressure relief channel. The boundary conditions include setting the flow boundary parameters of the flow inlet and the pressure boundary parameters of the pressure outlet of the pressure relief channel. The flow inlet is an explosion-proof valve, and the flow boundary parameters are determined based on the gas generation test results of battery thermal runaway. Step 0123: Perform pressure field calculation on the pressure relief channel to obtain the gas pressure and gas flow velocity at the explosion-proof valve.

[0070] Specifically, when performing flow field simulation, fluid mechanics knowledge is introduced. Based on the actual composition and operating temperature of the gas generated during battery thermal runaway, the gas in the pressure relief channel is assigned corresponding fluid properties, including at least one of the following: gas density, dynamic viscosity coefficient, specific heat capacity, and thermal conductivity. This makes the simulation environment closer to the real thermal runaway exhaust process and ensures that the calculation results are accurate and reliable.

[0071] Secondly, reasonable fluid boundary conditions are set for the pressure relief channel. The explosion-proof valve is set as the flow inlet, and the flow boundary parameters are determined based on the gas production volume and gas production rate obtained from the battery thermal runaway gas production test (such as ARC test) to simulate the real excitation of the gas generated by thermal runaway being discharged from the explosion-proof valve. At the same time, the end of the channel away from the explosion-proof valve is set as the pressure outlet, and pressure boundary conditions are given to form a complete flow field calculation constraint.

[0072] Based on this, pressure field and flow field simulation calculations were performed inside the pressure relief channel to obtain the gas pressure and gas velocity at the explosion-proof valve.

[0073] The pressure at the explosion-proof valve can reflect the risk of internal pressure accumulation and the degree of pressure buildup in the battery, while the flow rate can reflect the gas release efficiency and the smoothness of venting. Together, they characterize the pressure relief capacity of the pressure relief channel and the overall safety performance of the battery.

[0074] Step 013: Based on the safety performance parameters corresponding to each design scheme, determine the target design scheme whose safety performance parameters meet the preset conditions.

[0075] Specifically, after obtaining the safety performance parameters corresponding to each design scheme through simulation, the safety performance of multiple design schemes is compared to determine the target design scheme whose safety performance meets the preset conditions.

[0076] For example, by comparing the safety performance parameters of each design scheme, a design scheme that meets the safety performance standards or is optimal can be determined as the target design scheme.

[0077] In one optional embodiment, the preset conditions include at least one of the following conditions: The gas pressure of the target design scheme is the maximum gas pressure corresponding to each design scheme, and the gas flow rate of the target design scheme is the maximum gas flow rate corresponding to each design scheme. The gas pressure of the target design scheme is greater than the preset pressure threshold and the gas flow rate of the target design scheme is greater than the preset flow rate threshold.

[0078] It is understood that the higher the gas pressure and gas flow rate, the better the safety performance. Therefore, by determining the maximum gas pressure and the maximum gas flow rate corresponding to each design scheme, the design scheme with the highest gas pressure and gas flow rate is selected as the target design scheme, thereby selecting the target design scheme with the best safety performance.

[0079] Alternatively, due to different design schemes, in addition to considering the pressure relief of the explosion-proof valve (maximizing the upper limit of gas pressure and gas flow rate at the explosion-proof valve), there are other battery safety considerations, such as setting a bracket with through slots in the core pack interlayer, which can isolate thermal runaway between the two core packs.

[0080] Therefore, the design scheme in which the gas pressure is greater than the preset pressure threshold (an empirical value) and the gas flow rate of the target design scheme is greater than the preset flow rate threshold (an empirical value) can be identified as the target design scheme. One or more alternative design schemes that meet the safety performance standards can also be identified. Under the premise of ensuring the safety performance of the explosion-proof valve pressure relief, the target design scheme that is conducive to improving the overall safety performance of the battery can be selected from the alternative design schemes.

[0081] For example, if all the design schemes of the aforementioned schemes (1) to (3) meet the safety performance requirements of the explosion-proof valve pressure relief, scheme (3) can be selected to further improve the overall safety performance of the battery by isolating thermal runaway.

[0082] In one optional embodiment, the preset conditions include at least one of the following conditions: The safety performance evaluation value is the maximum value corresponding to each design scheme. The safety performance evaluation value is positively correlated with both gas pressure and gas flow rate. The safety performance assessment value is greater than the preset performance threshold.

[0083] It is understandable that users may have the same or different requirements for gas pressure and gas flow rate. When conducting a safety performance assessment, different weights can be assigned to gas pressure and gas flow rate based on the different requirements for gas pressure and gas flow rate. Then, based on the gas pressure, gas flow rate and corresponding weights of each design scheme, the safety performance assessment value can be calculated. For example, the safety performance assessment value is positively correlated with the safety performance.

[0084] After obtaining the safety performance evaluation values ​​of each design scheme, the design scheme with the highest safety performance evaluation value can be selected as the target design scheme, thus obtaining the target design scheme with optimal safety performance.

[0085] Alternatively, a design scheme with a safety performance evaluation value greater than a preset performance threshold (i.e., safety performance meets the standard) can be selected as a candidate design scheme, and then the target design scheme can be determined from each candidate design scheme.

[0086] All of the above technical solutions can be combined in any way to form optional embodiments of this application, and will not be described in detail here.

[0087] The battery design method of this application establishes a three-dimensional battery model of the pressure relief channel for different design schemes, and then performs flow field simulation of the pressure relief channel connected to the explosion-proof valve in the battery based on the three-dimensional battery model to obtain the flow field simulation results of the three-dimensional battery model corresponding to different design schemes, thereby determining the safety performance parameters that characterize the safety performance of the battery corresponding to each design scheme.

[0088] Finally, based on the safety performance parameters corresponding to each design scheme, the target design scheme that meets the safety performance requirements is determined.

[0089] In this way, simulation can quickly find the target design scheme that meets the safety performance requirements among various design schemes. Moreover, by introducing fluid dynamics and the flow field simulation realized by the battery three-dimensional model, the accuracy of the safety performance parameters can be guaranteed, thereby ensuring that the target design scheme meets the safety performance requirements.

[0090] Please see Figure 10 In one example, the explosion-proof valve and the core pack poles are respectively set at both ends of the core pack. For the (1) side patch thickness adjustment scheme, it can be seen that the gas pressure at the explosion-proof valve is 35 kPa and the gas flow rate at the explosion-proof valve is 200 m / s. Regarding the (2) slotted design of the inner wall of the shell, it can be seen that the gas pressure at the explosion-proof valve is 63 kPa and the gas flow velocity at the explosion-proof valve is 210 m / s; Regarding the (3) core packing interlayer with a support with through groove, it can be seen that the gas pressure at the explosion-proof valve is 97 kPa and the gas flow velocity at the explosion-proof valve is 282 m / s.

[0091] It can be seen that (3) the scheme with a support with a through groove in the core package interlayer has the highest gas pressure and gas flow rate at the explosion-proof valve. Therefore, for the above three schemes, scheme (3) can be selected as the target design scheme.

[0092] It is understood that this application uses the example of the explosion-proof valve and the terminal of the core pack being set at opposite ends of the core pack for illustration. For batteries where the explosion-proof valve and the terminal of the core pack are set at the same end of the core pack, the process of simulating different design schemes to obtain the corresponding safety performance parameters and determining the target design scheme is basically similar, and will not be repeated here.

[0093] To facilitate better implementation of the battery design method of this application, this application also provides a battery design apparatus. Please refer to... Figure 11 , Figure 11 This is a schematic diagram of the structure of a battery design apparatus provided in an embodiment of this application. The battery design apparatus 200 may include: The acquisition module 201 is used to acquire the battery three-dimensional model corresponding to the pressure relief channel of each different design scheme. The pressure relief channel includes a gas channel that is connected to the inside of the battery and the explosion-proof valve. Simulation module 202 is used to perform flow field simulation of the pressure relief channel based on the three-dimensional models of each battery, so as to obtain the safety performance parameters corresponding to each design scheme. The safety performance parameters are used to characterize the safety performance of the battery. The determination module 203 is used to determine the target design scheme whose safety performance parameters meet the preset conditions based on the safety performance parameters corresponding to each design scheme.

[0094] Each module or unit in the aforementioned battery design device can be implemented entirely or partially through software, hardware, or a combination thereof. Each of these units can be embedded in or independent of the processor in the electronic device in hardware form, or stored in the memory of the electronic device in software form, so that the processor can call and execute the operations corresponding to each of these units.

[0095] The battery design device 200 can be integrated into a terminal or server that has storage and a processor and thus computing power, or the battery design device 200 can be the terminal or server.

[0096] Optionally, this application also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0097] Figure 12 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device may be a terminal or a server. Figure 12 As shown, the electronic device 300 includes a processor 301 with one or more processing cores, a memory 302 with one or more computer-readable storage media, and a computer program stored in the memory 302 and executable on the processor. The processor 301 and the memory 302 are electrically connected. Those skilled in the art will understand that the electronic device structure shown in the figures does not constitute a limitation on the electronic device, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0098] The processor 301 is the control center of the electronic device 300. It connects various parts of the electronic device 300 through various interfaces and lines. By running or loading software programs and / or modules stored in the memory 302, and calling data stored in the memory 302, it executes various functions of the electronic device 300 and processes data, thereby performing overall processing of the electronic device 300.

[0099] Optional, such as Figure 12 As shown, the electronic device 300 also includes: a display screen 303, a radio frequency circuit 304, an audio circuit 305, an input unit 306, and a power supply 307. The processor 301 is electrically connected to the display screen 303, the radio frequency circuit 304, the audio circuit 305, the input unit 306, and the power supply 307. Those skilled in the art will understand that... Figure 12 The electronic device structure shown does not constitute a limitation on the electronic device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0100] The display screen 303 can be used to display a graphical user interface (GUI) and receive operation commands generated by the user interacting with the GUI. The display screen 303 may include a display panel and a touch panel. The display panel can be used to display information input by the user or information provided to the user, as well as various graphical user interfaces of the electronic device. These graphical user interfaces can be composed of graphics, text, icons, video, and any combination thereof. The touch panel can be used to collect touch operations performed by the user on or near it (such as operations performed by the user using a finger, stylus, or any suitable object or accessory on or near the touch panel), generate corresponding operation commands, and execute the corresponding program. Optionally, the touch panel may include a touch detection device and a touch controller. The touch detection device detects the user's touch location and the signal generated by the touch operation, and transmits the signal to the touch controller. The touch controller receives touch information from the touch detection device, converts it into touch point coordinates, sends it to the processor 301, and can receive and execute commands from the processor 301. The touch panel can cover the display panel. When the touch panel detects a touch operation on or near it, it transmits the information to the processor 301 to determine the type of touch event. Subsequently, the processor 301 provides corresponding visual output on the display panel according to the type of touch event. In this embodiment, the touch panel and the display panel can be integrated into the display screen 303 to achieve input and output functions. However, in some embodiments, the touch panel and the display screen 303 can be implemented as two independent components to achieve input and output functions. That is, the display screen 303 can also be used as part of the input unit 306 to achieve input functions.

[0101] The radio frequency circuit 304 can be used to transmit and receive radio frequency signals to establish wireless communication with network devices or other electronic devices, and to transmit and receive signals with network devices or other electronic devices.

[0102] Audio circuitry 305 can be used to provide an audio interface between a user and an electronic device via a speaker and a microphone. Audio circuitry 305 converts received audio data into electrical signals, transmits them to the speaker, and the speaker converts them into sound signals for output. Conversely, the microphone converts collected sound signals into electrical signals, which are then received by audio circuitry 305, converted back into audio data, and then processed by processor 301 before being transmitted via radio frequency circuitry 304 to, for example, another electronic device, or output to memory 302 for further processing. Audio circuitry 305 may also include an earphone jack to facilitate communication between peripheral headphones and electronic devices.

[0103] The input unit 306 can be used to receive input numbers, characters, or object feature information (such as fingerprints, irises, facial information, etc.), and to generate keyboard, mouse, joystick, optical, or trackball signal inputs related to user settings and function control.

[0104] Power supply 307 is used to supply power to various components of electronic device 300. Optionally, power supply 307 can be logically connected to processor 301 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. Power supply 307 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0105] although Figure 12 As not shown in the diagram, the electronic device 300 may also include a camera, sensor, wireless fidelity module, Bluetooth module, etc., which will not be described in detail here.

[0106] This application also provides a computer-readable storage medium for storing a computer program. This computer-readable storage medium can be applied to an electronic device, and the computer program causes the electronic device to execute the corresponding processes in the battery design method described in the embodiments of this application; for the sake of brevity, these will not be elaborated further here.

[0107] This application also provides a computer program product including 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 corresponding processes in the battery design method described in the embodiments of this application. For simplicity, further details are omitted here.

[0108] It should be understood that the processor in this application may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor described above can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0109] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0110] 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, or a combination of computer software and electronic hardware. 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 implementation should not be considered beyond the scope of this application.

[0111] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0112] In the embodiments of this application, the terms "module" or "unit" refer to a computer program or part of a computer program that has a predetermined function and works with other related parts to achieve a predetermined goal, and can be implemented wholly or partially using software, hardware (such as processing circuitry or memory), or a combination thereof. Similarly, a processor (or multiple processors or memory) can be used to implement one or more modules or units. Furthermore, each module or unit can be part of an overall module or unit that includes the functionality of that module or unit.

[0113] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0114] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0115] In addition, the functional units in 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.

[0116] If a function is implemented as 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 this application, in essence, or the part that contributes to the prior art, or a portion 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 or a server) to execute all or part of the steps of the methods in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0117] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included 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 battery design method, characterized in that, The method for designing the pressure relief channel of the battery includes: Obtain the three-dimensional battery model corresponding to the pressure relief channel of each different design scheme. The pressure relief channel includes a gas channel that communicates with the explosion-proof valve inside the battery. Based on the three-dimensional models of each battery, flow field simulation of the pressure relief channel is performed to obtain the safety performance parameters corresponding to each design scheme. The safety performance parameters are used to characterize the safety performance of the battery. Based on the safety performance parameters corresponding to each of the design schemes, a target design scheme is determined that the safety performance parameters meet the preset conditions.

2. The battery design method according to claim 1, characterized in that, The safety performance parameters include the gas pressure and gas flow velocity at the explosion-proof valve. Based on the three-dimensional models of each battery, flow field simulation of the pressure relief channel is performed to obtain the safety performance parameters corresponding to each design scheme. These safety performance parameters characterize the safety performance of the battery, including: The gas in the pressure relief channel is given physical property parameters, which include at least one of the following: gas density, dynamic viscosity coefficient, specific heat capacity, and thermal conductivity. The boundary conditions of the pressure relief channel are set, including setting the flow boundary parameters of the flow inlet and setting the pressure boundary parameters of the pressure outlet of the pressure relief channel. The flow inlet is the explosion-proof valve, and the flow boundary parameters are determined based on the gas generation test results of battery thermal runaway. Pressure field calculations were performed on the pressure relief channel to obtain the gas pressure and gas velocity at the explosion-proof valve.

3. The battery design method according to claim 1, characterized in that, The safety performance parameters include the gas pressure and gas flow rate at the explosion-proof valve, and the preset conditions include at least one of the following conditions: The gas pressure of the target design scheme is the maximum value of the gas pressure corresponding to each of the design schemes, and the gas flow rate of the target design scheme is the maximum value of the gas flow rate corresponding to each of the design schemes. The gas pressure of the target design scheme is greater than a preset pressure threshold and the gas flow rate of the target design scheme is greater than a preset flow rate threshold.

4. The battery design method according to claim 1, characterized in that, The safety performance parameters include the gas pressure and gas flow rate at the explosion-proof valve, and the preset conditions include at least one of the following conditions: The safety performance evaluation value is the maximum value of the safety performance evaluation value corresponding to each of the design schemes, and the safety performance evaluation value is positively correlated with both the gas pressure and the gas flow rate. The security performance evaluation value is greater than the preset performance threshold.

5. A battery, characterized in that, The design scheme of the pressure relief channel of the battery is determined by the battery design method according to any one of claims 1-4. The battery includes a core pack, a shell and an explosion-proof valve, wherein the core pack and the shell form a pressure relief channel communicating with the explosion-proof valve.

6. The battery according to claim 5, characterized in that, The housing includes a first top cover, a side plate, and a second top cover. The first top cover and the second top cover are disposed opposite to each other. The side plate connects the first top cover and the second top cover. The side of the core pack is disposed opposite to the side plate. The battery also includes a side patch disposed on the side.

7. The battery according to claim 6, characterized in that, The explosion-proof valve is installed on the first top cover or the second top cover.

8. The battery according to claim 5, characterized in that, The housing includes a first top cover, a side plate, and a second top cover. The first top cover and the second top cover are disposed opposite to each other. The side plate connects the first top cover and the second top cover. A flow guide groove is formed on the inner wall of the side plate, and the flow guide groove is connected to the explosion-proof valve.

9. The battery according to claim 8, characterized in that, The flow guide channel includes multiple channels, which are spaced apart and extend along the direction from the first top cover to the second top cover.

10. The battery according to claim 6, characterized in that, The housing includes a first top cover, a side plate, and a second top cover. The first top cover and the second top cover are disposed opposite to each other, and the side plate connects the first top cover and the second top cover. The core pack includes a first core pack and a second core pack. The battery also includes a bracket, which is disposed between the first core pack and the second core pack. The bracket has a through groove that extends from the first top cover to the second top cover and communicates with the explosion-proof valve.

11. An electronic device, characterized in that, The electronic device includes a processor and a memory, the memory storing a computer program, and the processor executing the battery design method according to any one of claims 1-4 by calling the computer program stored in the memory.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program adapted for loading by a processor to perform the battery design method as described in any one of claims 1-4.

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