Battery hardness detection method, device, computer equipment and storage medium

Abstract

The present invention relates to the field of battery measurement, and specifically discloses a battery hardness detection method, device, computer equipment and storage medium, wherein the method comprises: applying a force at a preset position of a battery to be tested, obtaining a load value and a deformation amount of the battery to be tested under the action of the force; and calculating the hardness of the battery to be tested according to the load value, the deformation amount and a preset hardness coefficient. The present invention can realize automatic machine testing of the hardness of the battery to be tested, and can quantitatively judge whether the battery is soft according to the hardness, with high accuracy, saving a lot of labor costs and low detection costs.

Description

Technical Field

[0001] The present invention relates to the field of battery measurement, and in particular to an electric hardness detection cell method, device, computer equipment and storage medium. Background Art

[0002] In the manufacturing process of lithium batteries, the formation of lithium batteries is an extremely important process that affects battery performance. In the formation process, battery softening is one of the most prominent and difficult to detect serious defects. On the one hand, battery softening can easily cause increased polarization inside the battery and increase the internal resistance of the battery, which greatly threatens the safety of the battery pack; on the other hand, battery softening can also easily cause abnormal swelling, making it difficult for the pole pieces to be tightly bonded together, resulting in a drop in battery capacity, which not only shortens the battery life, but also has a potential greater risk of leakage.

[0003] At present, the main way to detect whether a lithium battery is soft is to manually bend the battery by hand and rely on the touch of the hand to determine whether the battery is soft. This detection method has the following disadvantages: ① There is a lack of quantitative standards for whether the battery is soft or not, and the degree of battery softness cannot be quantified; ② The touch of identifying soft batteries varies from person to person, and it is impossible to establish a unified standard, and the accuracy is low; ③ A full inspection requires a lot of manpower, and the labor cost is very high.

[0004] It can be seen that the current battery softening detection method lacks quantitative standards, making it difficult to quantify the degree of battery softening, has low accuracy, and high detection costs. Summary of the invention

[0005] Based on this, it is necessary to provide a battery hardness detection method, device, computer equipment and storage medium to address the above technical problems, so as to solve the problems that the current battery softening detection method lacks quantitative standards, is difficult to quantify the degree of battery softening, has low accuracy and high detection costs.

[0006] A battery hardness detection method, comprising:

[0007] Applying a force at a preset position of the battery to be tested, and obtaining a load value and a deformation amount of the battery to be tested under the action of the force;

[0008] The hardness of the battery to be tested is calculated according to the load value, deformation amount and a preset hardness coefficient.

[0009] A battery hardness detection device, comprising:

[0010] An acquisition module, used for applying a force at a preset position of the battery to be tested, and obtaining a load value and a deformation amount of the battery to be tested under the action of the force;

[0011] The hardness calculation module is used to calculate the hardness of the battery to be tested according to the load value, deformation amount and a preset hardness coefficient.

[0012] A computer device comprises a memory, a processor and computer-readable instructions stored in the memory and executable on the processor, wherein the processor implements the battery hardness detection method when executing the computer-readable instructions.

[0013] One or more readable storage media storing computer-readable instructions, when the computer-readable instructions are executed by one or more processors, the one or more processors execute the battery hardness detection method as described above.

[0014] The battery hardness detection method, device, computer equipment and storage medium described above apply a force to a preset position of the battery to be tested to obtain the load value and deformation amount of the battery to be tested under the action of the force; and calculate the hardness of the battery to be tested according to the load value, deformation amount and preset hardness coefficient. The hardness can be used to automatically and quantitatively judge whether the battery is soft, with high accuracy, saving a lot of labor costs and low detection costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0016] Figure 1 is a flow chart of a battery hardness detection method according to an embodiment of the present invention;

[0017] Figure 2 is a schematic structural diagram of a battery hardness detection device in one embodiment of the present invention;

[0018] Figure 3 is a schematic diagram of a computer device in one embodiment of the present invention. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The battery hardness detection method provided in this embodiment applies a force to a preset position of the battery to be tested, obtains the load value and deformation amount of the battery to be tested under the action of the force; and calculates the hardness of the battery to be tested according to the load value, deformation amount and preset hardness coefficient. The present invention can realize the automatic measurement of the hardness of the battery to be tested by a machine, and can further judge whether the battery is softened according to the hardness, with high accuracy, saving a lot of manpower costs, low detection costs, and can timely select softened batteries in the formation process, ensuring the electrical performance and safety of mass-produced batteries.

[0021] In one embodiment, if Figure 1 As shown, a battery hardness detection method is provided, comprising the following steps:

[0022] Step S10: applying a force at a preset position of the battery to be tested, and obtaining a load value and a deformation amount of the battery to be tested under the action of the force.

[0023] The battery to be tested generally refers to all soft-packaged batteries. For example, the battery to be tested may be a soft-packaged lithium battery.

[0024] In one embodiment, the above step S10 includes:

[0025] Apply a specified load at a preset position of the battery to be tested; wherein the specified load is a specified pressure load or a specified bending moment load.

[0026] The deformation amount of the battery to be tested under the action of the specified load is obtained through a preset sensor device.

[0027] As an example, a support device with a clamping portion (such as a support bracket with two clamping portions) may be first used to fix both ends of the battery to be tested, and then a specified load may be applied to a preset position of the battery to be tested.

[0028] The preset position may be the middle of the battery to be tested; or the two side ends of the battery to be tested. Specifically, the preset position may be the position of the two clamping parts after the battery to be tested is clamped and fixed by the two clamping parts of the support device.

[0029] As an example, a specified load is applied at a preset position of the battery to be tested, specifically, a specified pressure load is applied at the middle position of the battery to be tested; or, a specified bending moment load is applied at both ends of the battery to be tested.

[0030] The application of a specified pressure load or a specified bending moment load generally refers to applying a pressure load or a bending moment load of a preset magnitude to the battery to be tested.

[0031] In one embodiment, before applying a specified load at a preset position of the battery to be tested, the method further includes:

[0032] Acquire the size parameters of the battery to be tested; and calculate the specified load to be applied to the battery to be tested according to the size parameters.

[0033] The size parameters of the battery to be tested include the width and thickness of the battery to be tested.

[0034] According to the size parameters of the battery to be tested, the specified load to be applied to the battery to be tested is calculated. Generally, different sizes of batteries to be tested correspond to different sizes of specified loads. Generally, the thicker the battery to be tested, the greater the specified load to be applied.

[0035] As an example, the size of the load to be applied can be determined according to the size of the battery to be tested. Generally, the load applied to the battery to be tested is in the range of 0.1 to 5N. The specific load applied can be adjusted appropriately according to the change in the size (such as width, thickness) of the battery to be tested. For example, for a battery to be tested with a size of 200mm*200mm*10mm (length*width*thickness), a load of 2N can be applied. When the width of the battery to be tested decreases and the thickness increases, the applied load can be appropriately increased, and the applied load is greater than 2N.

[0036] In practical applications, for batteries with a size less than 200mm*200mm*10mm, the same load specification can be used to complete the above test.

[0037] In another embodiment, the above step S10 includes:

[0038] A force is applied at a preset position of the battery to be tested so that the battery to be tested reaches a preset deformation amount.

[0039] The load value of the battery to be tested when it reaches a preset deformation amount is obtained through a preset sensor device.

[0040] As an example, a longitudinal load may be applied to the middle of the battery to be tested to make the battery to be tested reach a preset deformation amount; or a force may be applied to both ends of the battery to be tested to rotate the battery to be tested by a preset angle to achieve a preset deformation amount.

[0041] A longitudinal load is applied to the middle position of the battery to be tested, so that the battery to be tested moves from a current fixed position to a preset position, that is, moves a certain displacement, so that the battery to be tested reaches a preset deformation amount.

[0042] In addition, applying a force to both ends of the battery to be tested may be applying a force to the battery to be tested at the position of a clamping portion for clamping and fixing both ends of the battery to be tested, so that the battery to be tested rotates a certain angle to achieve a preset deformation amount.

[0043] Generally, different sizes of batteries to be tested correspond to different displacement sizes. Specifically, the displacement size to be applied can be determined according to the size of the battery to be tested. Generally, the displacement size applied to the battery to be tested is in the range of 0.01mm to 0.1mm. The specific displacement size can be appropriately adjusted according to the changes in the size of the battery to be tested (such as width, thickness). For example, for a battery to be tested with a size of 200mm*200mm*10mm (length*width*thickness), a displacement of 0.05mm can be selected. When the width of the battery to be tested decreases and the thickness increases, the applied displacement value can be appropriately increased. At this time, the applied displacement is greater than 0.05mm.

[0044] In practical applications, for a battery to be tested with a size less than 200 mm*200 mm*10 mm, the same displacement value can be applied to complete the above test.

[0045] Step S20, calculating the hardness of the battery to be tested according to the load value, the deformation amount and the preset hardness coefficient.

[0046] In the definition domain of 0 to 1, the functional relationship between the hardness of the battery to be tested and the load value and deformation is an S-shaped curve functional relationship. Generally speaking, the closer the battery hardness is to 0, the softer the battery is; the closer the battery hardness is to 1, the greater the battery hardness, that is, the greater the battery stiffness.

[0047] As an example, if a specified load is applied to a preset position of the battery to be tested, the deformation of the battery to be tested under the specified load is obtained, and the hardness of the battery to be tested is calculated based on the specified load, the deformation and the preset hardness coefficient.

[0048] As another example, if a force is applied at a preset position of the battery to be tested so that the battery to be tested reaches a preset deformation amount, the load value of the battery to be tested when the preset deformation amount is reached is obtained, and the hardness of the battery to be tested is calculated based on the load value, the deformation amount and the preset hardness coefficient.

[0049] Specifically, according to the formula The hardness of the battery to be tested is calculated, where D is the hardness of the battery to be tested, W is the deformation of the battery to be tested, K is the hardness coefficient of the battery to be tested, and P is the load value.

[0050] The stiffness coefficient of the battery under test is related to the length, width, thickness of the battery under test, the spacing between the clamping parts used to fix the battery under test during the test, and the position where the load is applied to the battery under test.

[0051] In one embodiment, before the above step S20, the method further includes the following steps:

[0052] Get the length, width, and thickness of the battery to be tested.

[0053] Sets preset stiffness factors based on length, width, thickness, and location of application of specified loads.

[0054] The material refers to the soft packaging material of the battery to be tested (eg, aluminum foil, etc.).

[0055] Specifically, the hardness coefficient is mainly affected by the width, thickness and the spacing between the clamping parts used to fix the battery to be tested during the test. Among them, the wider the width of the battery to be tested, the higher its hardness coefficient; the thicker the thickness of the battery to be tested, the higher its hardness coefficient; the larger the spacing between the clamping parts used to fix the battery to be tested during the test, the larger its hardness coefficient; the longer the length of the battery to be tested, the smaller its hardness coefficient. The length of the battery to be tested has a relatively smaller impact on its hardness coefficient than the width, thickness and the spacing between the clamping parts used to fix the battery to be tested during the test.

[0056] In an embodiment of the present invention, a mechanical model is used in which beams of different stiffnesses will bend and deform under the same bending moment and produce different deformation amounts. Specifically, first, a force is applied at a preset position of the battery to be tested so that the cross section of the battery is subjected to the bending moment and bends and deforms. Then, the deformation amount and load value of the battery to be tested under the applied force are obtained through a preset sensing device (e.g., a sensor, etc.). Then, the hardness of the battery to be tested is calculated based on the deformation amount, the load value and the preset hardness coefficient. Finally, whether the battery to be tested is softened can be determined based on the hardness of the battery. For example, if the Shore hardness of the battery to be tested is less than 90 degrees, the battery to be tested is softened. Generally, the smaller the hardness, the smaller the stiffness of the battery to be tested, that is, the higher the degree of softening of the battery to be tested; conversely, the greater the stiffness of the battery to be tested.

[0057] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0058] In one embodiment, a battery hardness detection device is provided, and the battery hardness detection device corresponds to the battery hardness detection method in the above embodiment. Figure 2 As shown, the battery hardness detection device includes an acquisition module 11 and a hardness calculation module 12. The detailed description of each functional module is as follows:

[0059] Acquisition module 11, for applying a force at a preset position of the battery to be tested, and obtaining the load value and deformation amount of the battery to be tested under the action of the force.

[0060] The hardness calculation module 12 is used to calculate the hardness of the battery to be tested according to the load value, deformation amount and a preset hardness coefficient.

[0061] In one embodiment, the acquisition module 11 may be specifically used for:

[0062] Apply a specified load at a preset position of the battery to be tested; wherein the specified load is a specified pressure load or a specified bending moment load.

[0063] The deformation amount of the battery to be tested under the action of the specified load is obtained through a preset sensor device.

[0064] The hardness calculation module 12 can be specifically used to calculate the hardness of the battery to be tested according to the specified load, deformation amount and preset hardness coefficient.

[0065] In one embodiment, the battery hardness detection device further includes:

[0066] The size parameter acquisition module is used to acquire the size parameters of the battery to be tested.

[0067] The specified load calculation module is used to calculate the specified load that should be applied to the battery to be tested according to the size parameters.

[0068] In one embodiment, the acquisition module 11 is specifically used to: apply a specified pressure load to the middle of the battery to be tested; or apply a specified bending moment load to both ends of the battery to be tested.

[0069] In one embodiment, the battery hardness detection device further includes:

[0070] The battery parameter acquisition module is used to obtain the length, width and thickness of the battery to be tested.

[0071] The hardness coefficient setting module is used to set a preset hardness coefficient according to the length, width, thickness and the application position of the specified load.

[0072] In one embodiment, the acquisition module 11 is further used for:

[0073] A force is applied at a preset position of the battery to be tested so that the battery to be tested reaches a preset deformation amount.

[0074] The load value of the battery to be tested when it reaches a preset deformation amount is obtained through a preset sensor device.

[0075] In one embodiment, a force is applied at a preset position of the battery to be tested so that the battery to be tested reaches a preset deformation amount. Specifically, a longitudinal load can be applied at the middle position of the battery to be tested so that the battery to be tested reaches a preset deformation amount; or, a force is applied at both ends of the battery to be tested so that the battery to be tested rotates a preset angle to achieve a preset deformation amount.

[0076] The specific definition of the battery hardness detection device can be found in the definition of the battery hardness detection method above, which will not be repeated here. Each module in the above-mentioned battery hardness detection device can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0077] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 3 As shown. The computer device includes a processor, a memory, a network interface and a database connected via a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a readable storage medium and an internal memory. The readable storage medium stores an operating system, computer-readable instructions and a database. The internal memory provides an environment for the operation of the operating system and computer-readable instructions in the readable storage medium. The database of the computer device is used to store data involved in the battery hardness detection method. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer-readable instructions are executed by the processor, a battery hardness detection method is implemented. The readable storage medium provided in this embodiment includes a non-volatile readable storage medium and a volatile readable storage medium.

[0078] In one embodiment, a computer device is provided, including a memory, a processor, and computer-readable instructions stored in the memory and executable on the processor, wherein the processor executes the computer-readable instructions to implement the following steps:

[0079] Applying a force at a preset position of the battery to be tested, and obtaining a load value and a deformation amount of the battery to be tested under the action of the force;

[0080] The hardness of the battery to be tested is calculated according to the load value, deformation amount and a preset hardness coefficient.

[0081] In one embodiment, one or more computer-readable storage media storing computer-readable instructions are provided. The readable storage media provided in this embodiment include non-volatile readable storage media and volatile readable storage media. The readable storage media store computer-readable instructions. When the computer-readable instructions are executed by one or more processors, the following steps are implemented:

[0082] Applying a force at a preset position of the battery to be tested, and obtaining a load value and a deformation amount of the battery to be tested under the action of the force;

[0083] The hardness of the battery to be tested is calculated according to the load value, deformation amount and a preset hardness coefficient.

[0084] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing related hardware through computer-readable instructions, and the computer-readable instructions can be stored in a non-volatile readable storage medium or a volatile readable storage medium. When the computer-readable instructions are executed, they may include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0085] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0086] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A battery hardness detection method, characterized in that: include: Applying a force at a preset position of the battery to be tested, and obtaining a load value and a deformation amount of the battery to be tested under the action of the force; Calculating the hardness of the battery to be tested according to the load value, deformation amount and a preset hardness coefficient; The step of applying a force at a preset position of the battery to be tested and obtaining a load value and a deformation amount of the battery to be tested under the action of the force includes: Applying a specified load at a preset position of the battery to be tested; wherein the specified load is a specified pressure load or a specified bending moment load; Obtaining the deformation amount of the battery under test under the action of the specified load through a preset sensor device; The step of calculating the hardness of the battery to be tested according to the load value, the deformation amount and a preset hardness coefficient comprises: Get the length, width and thickness of the battery to be tested; According to the length, width, thickness, the spacing between the clamping parts used to fix the battery to be tested during the test, and the application position of the specified load, a preset hardness coefficient is set, wherein the wider the width of the battery to be tested, the higher the hardness coefficient, the thicker the thickness of the battery to be tested, the higher the hardness coefficient, the larger the spacing between the clamping parts used to fix the battery to be tested during the test, the larger the hardness coefficient, and the longer the length of the battery to be tested, the smaller the hardness coefficient; According to the formula The hardness of the battery to be tested is calculated and used to determine whether the battery is soft, wherein D is the hardness of the battery to be tested, W is the deformation of the battery to be tested, K is the hardness coefficient of the battery to be tested, and P is the load value; The step of applying a specified load at a preset position of the battery to be tested includes: Applying a specified pressure load at the middle position of the battery to be tested; or, A specified bending moment load is applied to both ends of the battery to be tested.

2. The battery hardness detection method according to claim 1, characterized in that: Before applying the specified load at the preset position of the battery to be tested, the method includes: Obtaining the size parameters of the battery to be tested; According to the dimensional parameters, a specified load that should be applied to the battery to be tested is determined.

3. The battery hardness detection method according to claim 1, characterized in that: The step of applying a force at a preset position of the battery to be tested and obtaining a load value and a deformation amount of the battery to be tested under the action of the force includes: Applying a force at a preset position of the battery to be tested so that the battery to be tested reaches a preset deformation amount; The load value of the battery to be tested when it reaches a preset deformation amount is obtained through a preset sensor device.

4. The battery hardness detection method according to claim 3, characterized in that: The step of applying a force at a preset position of the battery to be tested so that the battery to be tested reaches a preset deformation amount includes: Applying a longitudinal load to the middle of the battery to be tested so that the battery to be tested reaches a preset deformation amount; or, A force is applied to both ends of the battery to be tested to rotate the battery to be tested by a preset angle to achieve a preset deformation amount.

5. A battery hardness detection device, characterized in that: include: An acquisition module, used for applying a force at a preset position of the battery to be tested, and obtaining a load value and a deformation amount of the battery to be tested under the action of the force; A hardness calculation module, used to calculate the hardness of the battery to be tested according to the load value, deformation amount and a preset hardness coefficient; The acquisition module is used for: Applying a specified load at a preset position of the battery to be tested; wherein the specified load is a specified pressure load or a specified bending moment load; Obtaining the deformation amount of the battery under test under the action of the specified load through a preset sensor device; The hardness calculation module is used for: Get the length, width and thickness of the battery to be tested; According to the length, width, thickness, the spacing between the clamping parts used to fix the battery to be tested during the test, and the application position of the specified load, a preset hardness coefficient is set, wherein the wider the width of the battery to be tested, the higher the hardness coefficient, the thicker the thickness of the battery to be tested, the higher the hardness coefficient, the larger the spacing between the clamping parts used to fix the battery to be tested during the test, the larger the hardness coefficient, and the longer the length of the battery to be tested, the smaller the hardness coefficient; According to the formula The hardness of the battery to be tested is calculated and used to determine whether the battery is soft, wherein D is the hardness of the battery to be tested, W is the deformation of the battery to be tested, K is the hardness coefficient of the battery to be tested, and P is the load value; The acquisition module is used for: Applying a specified pressure load at the middle position of the battery to be tested; or, A specified bending moment load is applied to both ends of the battery to be tested.

6. A computer device comprising a memory, a processor, and computer-readable instructions stored in the memory and executable on the processor, characterized in that: When the processor executes the computer-readable instructions, the battery hardness detection method according to any one of claims 1 to 4 is implemented.

7. One or more readable storage media storing computer-readable instructions, wherein when the computer-readable instructions are executed by one or more processors, the one or more processors execute the battery hardness detection method according to any one of claims 1 to 4.

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