Compression characteristic value test method, device, electronic equipment and medium based on pole piece

Abstract

The embodiment of the present application provides a method, device, electronic device and medium for testing compression characteristic values ​​based on pole pieces, which belongs to the technical field of lithium-ion batteries. The method includes: punching each pole piece to be tested by a punching device to obtain a plurality of pole piece samples; selecting a first preset number of first target pole piece samples from each of the pole piece samples, and obtaining a target thickness value according to the thickness value of each of the first target pole piece samples; selecting a second preset number of second target pole piece samples from each of the pole piece samples, and testing each of the second target pole piece samples by a testing device to obtain a target test value; determining the compression characteristic value of the pole piece to be tested according to the target test value and the target thickness value. The scheme provided can accurately measure the compression characteristic value of the pole piece of a lithium-ion battery.

Description

Technical Field

[0001] The present application relates to the technical field of lithium-ion batteries, and in particular to a method, device, electronic equipment and medium for testing compression characteristic values ​​based on pole pieces. Background Art

[0002] Lithium-ion batteries are composed of multiple components, including positive electrodes, negative electrodes, separators, and shells. The mechanical properties of these components have a great influence on the performance of lithium-ion batteries. When tensile tests are performed on lithium-ion batteries, due to the loose and porous characteristics of the active materials in the pole pieces, they cannot withstand loads in the tensile direction. This means that traditional tensile test methods cannot accurately measure the compression characteristic values ​​of lithium-ion battery pole pieces. Summary of the invention

[0003] In order to solve the above technical problems, the embodiments of the present application provide a compression characteristic value testing method, device, electronic device and medium based on a pole piece.

[0004] In a first aspect, an embodiment of the present application provides a method for testing a compression characteristic value based on a pole piece, the method comprising:

[0005] Punching each electrode to be tested by a punching device to obtain a plurality of electrode samples;

[0006] Selecting a first preset number of first target pole piece samples from each of the pole piece samples, and obtaining a target thickness value according to the thickness value of each of the first target pole piece samples;

[0007] Selecting a second preset number of second target pole piece samples from each of the pole piece samples, and testing each of the second target pole piece samples by a testing device to obtain a target test value;

[0008] The compression characteristic value of the pole piece to be tested is determined according to the target test value and the target thickness value.

[0009] In one embodiment, each of the electrode pieces to be tested is subjected to a baking process, and each of the electrode pieces to be tested is subjected to a cooling process after baking.

[0010] In one embodiment, the punching device is used to punch each of the electrode pieces to be tested to obtain electrode piece samples to be screened;

[0011] Among the electrode samples to be screened, the electrode samples to be screened that meet the preset conditions are selected as electrode samples.

[0012] In one embodiment, the thickness values ​​of each of the first target pole piece samples are obtained, and the average value of the thickness values ​​of each of the first target pole piece samples is used as the target thickness value.

[0013] In one embodiment, each of the second target pole piece samples is used as a first pole piece sample set, and the test device is controlled to perform compression processing on the first pole piece sample set according to preset test parameters;

[0014] The compression distance value, the test pressure value and the loading force are recorded in real time until the first pole piece sample set is broken, or the loading force is greater than or equal to a preset loading force threshold, wherein if the attenuation degree of the loading force is greater than or equal to the preset attenuation threshold, it is determined that the first pole piece sample set is broken;

[0015] A force-displacement curve is obtained according to the compression distance value and the test pressure value, and the target test value is obtained according to the force-displacement curve.

[0016] In one embodiment, the target test value includes: a test area value and a test pressure value, and the compression characteristic value includes: a compression strength value; and the division value of the test pressure value and the test area value is determined as the compression strength value of the electrode to be tested.

[0017] In one embodiment, the target test value further includes: a test displacement value, and the compression characteristic value further includes: a compression rate; and the compression rate of the pole piece to be tested is determined as the division value of the test displacement value and the target thickness value.

[0018] In a second aspect, an embodiment of the present application provides a compression characteristic value testing device based on a pole piece, and the compression characteristic value testing device based on a pole piece includes:

[0019] An acquisition module is used to perform a punching process on each electrode to be tested by a punching device to obtain a plurality of electrode samples;

[0020] A selection module, used for selecting a first preset number of first target pole piece samples from each of the pole piece samples, and obtaining a target thickness value according to the thickness values ​​of each of the first target pole piece samples;

[0021] A testing module, used for selecting a second preset number of second target pole piece samples from each of the pole piece samples, and testing each of the second target pole piece samples through a testing device to obtain a target test value;

[0022] A determination module is used to determine the compression characteristic value of the pole piece to be tested according to the target test value and the target thickness value.

[0023] In a third aspect, an embodiment of the present application provides an electronic device, including a memory and a processor, wherein the memory is used to store a computer program, and when the computer program is run by the processor, the compression characteristic value testing method based on the pole piece provided in the first aspect is executed.

[0024] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program, which, when running on a processor, executes the compression characteristic value testing method based on a pole piece provided in the first aspect.

[0025] The above-mentioned electrode-based compression characteristic value test method, device, electronic device and medium provided by the present application, wherein the method includes: punching each electrode to be tested by a punching device to obtain multiple electrode samples; selecting a first preset number of first target electrode samples from each of the electrode samples, and obtaining a target thickness value according to the thickness value of each of the first target electrode samples; selecting a second preset number of second target electrode samples from each of the electrode samples, and testing each of the second target electrode samples by a testing device to obtain a target test value; determining the compression characteristic value of the electrode to be tested according to the target test value and the target thickness value. Through the provided scheme, the compression characteristic value of the lithium-ion battery electrode can be accurately measured, and the test efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and should not be regarded as limiting the scope of protection of the present application. In each of the drawings, similar components are numbered similarly.

[0027] Figure 1 A schematic diagram of a flow chart of a compression characteristic value testing method based on a pole piece provided in an embodiment of the present application is shown;

[0028] Figure 2 A schematic diagram showing a comparison of force-displacement curves of a positive electrode sheet provided in an embodiment of the present application is shown;

[0029] Figure 3 A schematic diagram comparing stress-strain curves of negative electrode sheets provided in an embodiment of the present application is shown;

[0030] Figure 4 A schematic structural diagram of a compression characteristic value testing device based on a pole piece provided in an embodiment of the present application is shown;

[0031] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application is shown.

[0032] Icons: 400 - compression characteristic value testing device based on pole piece, 401 - acquisition module, 402 - selection module, 403 - testing module, 404 - determination module, 500 - electronic device, 501 - transceiver, 502 - processor, 503 - memory. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0034] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0035] Hereinafter, the terms "including", "having" and their cognates, which may be used in various embodiments of the present application, are intended only to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing items or adding the possibility of one or more features, numbers, steps, operations, elements, components, or combinations of the foregoing items.

[0036] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0037] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally understood by those skilled in the art to which the various embodiments of the present application belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present application.

[0038] At present, lithium-ion batteries are usually composed of aluminum foil, positive electrode active layer, copper foil, negative electrode active layer, diaphragm and steel shell. The mechanical properties of each component play a key role in the overall mechanical properties of lithium-ion batteries. Among them, the foil, diaphragm and steel shell can be used to measure their mechanical properties by tensile tests. However, the active layers of positive and negative electrodes are special because their active materials are loose and porous, which makes it almost impossible to bear the load in the tensile direction. The contribution rate of the positive electrode active layer to the tensile strength of the electrode is only 20% at most, and the negative electrode active layer is only about 7%. Therefore, the tensile strength of the electrode is largely determined by the foil, and for the mechanical properties of the electrode itself, it is necessary to consider its yield in the compression direction and carry out compression strength tests. Therefore, the present application provides a compression characteristic value test based on the electrode, which can effectively obtain the compression characteristic value of the electrode to be tested, and determine the mechanical properties of the lithium-ion battery based on the compression characteristic value.

[0039] Example 1

[0040] The present application embodiment provides a compression characteristic value test based on a pole piece. Figure 1 , the compression characteristic value test based on the pole piece includes:

[0041] S101, punching each electrode to be tested by a punching device to obtain a plurality of electrode samples.

[0042] In one embodiment, each of the electrode pieces to be tested is subjected to a baking process, and each of the electrode pieces to be tested is subjected to a cooling process after baking.

[0043] In the embodiment of the present application, the positive and negative electrodes of the lithium-ion battery are placed in a vacuum environment at 60°C-80°C and baked for more than 8 hours. After baking, the positive and negative electrodes are naturally cooled in an oven or in an environment with a humidity of ≤2%. By baking, the moisture in the positive and negative electrodes can be effectively removed to prevent the moisture from reacting with the electrolyte and reducing the cycle life of the battery. By cooling, the positive and negative electrodes are prevented from reabsorbing the cooling and ensuring that the positive and negative electrodes are in a low humidity state.

[0044] It should be noted that the baking temperature, baking time and cooling temperature set in this application can be adjusted according to actual conditions, and this application does not limit this.

[0045] In one embodiment, the punching device is used to punch each of the electrode pieces to be tested to obtain electrode piece samples to be screened; and the electrode piece samples to be screened that meet preset conditions are selected from the electrode piece samples to be screened as electrode piece samples.

[0046] It should be noted that each electrode to be tested is punched with a puncher, and a puncher with a diameter of 10mm-30mm can be selected to punch out the electrode sample. Since the compression strength of the negative electrode is relatively low, a puncher with a diameter of 10-30mm can be selected at will, while the compression strength of the positive electrode is relatively high, and only a puncher with a diameter of 10mm can be selected. Therefore, it is necessary to determine in advance whether the electrode to be tested is a positive electrode or a negative electrode, and select the diameter of the puncher according to the confirmation result.

[0047] The electrode pieces to be tested that have been punched are determined as the electrode piece samples to be screened. Since creases and burrs may affect the test results of the electrode pieces, it is necessary to screen out electrode piece discs without creases and burrs from each electrode piece sample to be screened.

[0048] S102, selecting a first preset number of first target pole piece samples from each of the pole piece samples, and obtaining a target thickness value according to the thickness value of each of the first target pole piece samples.

[0049] Optionally, the thickness value of each of the first target pole piece samples is obtained, and the average value of the thickness value of each of the first target pole piece samples is used as the target thickness value.

[0050] In this embodiment, 10 pole pieces are randomly selected from the pole piece samples, the thickness of each pole piece is tested by a micrometer, and the average value of the thickness of each pole piece is taken as the target thickness value.

[0051] It should be noted that the selected first preset number is not a fixed value, and the device for testing the thickness value of each electrode piece can be any device that can perform the measurement, which can be selected according to needs, and this application does not limit this.

[0052] S103, selecting a second preset number of second target pole piece samples from each of the pole piece samples, and testing each of the second target pole piece samples by a testing device to obtain a target test value.

[0053] It should be noted that the ratio of the pole piece test thickness to the pole piece diameter should be less than or equal to 0.5. For example, if the pole piece diameter is 10 mm and the thickness of a single pole piece is 0.133 mm, the second preset number value that can be selected must be less than or equal to 37 pieces.

[0054] In one embodiment, each of the second target pole piece samples is used as the first pole piece sample set, and the test equipment is controlled to compress the first pole piece sample set according to preset test parameters; the compression distance value, test pressure value and loading force are recorded in real time until the first pole piece sample set is broken, or the loading force is greater than or equal to a preset loading force threshold, wherein if the attenuation degree of the loading force is greater than or equal to the preset attenuation threshold, the first pole piece sample set is judged to be broken; a force-displacement curve is obtained according to the compression distance value and the test pressure value, and the target test value is obtained according to the force-displacement curve.

[0055] In this embodiment, the first pole piece sample set is tested by controlling the universal testing machine, the loading speed value of the universal testing machine is pre-set, the first pole piece sample set is compressed according to the loading speed value, and the test is stopped when the loading force is greater than or equal to the maximum force of the machine range or the pole piece is broken, wherein the first pole piece sample set includes all selected second preset number of second target pole piece samples.

[0056] It should be noted that during the compression process, the universal test machine will display the compression distance value, test pressure value and loading force. When the loading force is greater than the preset attenuation threshold, the first pole piece sample set is determined to be broken. For example: when the preset attenuation threshold is set to 50%, when the test displacement is 4mm, the loading force is 1000kgf, when the test displacement is 5mm, the loading force is 400kgf, and the force of the two adjacent sampling points is attenuated by (1000-400) / 1000=0.6, that is, the attenuation degree is 60%, which is greater than the preset attenuation threshold of 50%, so it is necessary to judge that the pole piece is broken.

[0057] S104, determining the compression characteristic value of the pole piece to be tested according to the target test value and the target thickness value.

[0058] In one embodiment, the target test value includes: a test area value and a test pressure value, and the compression characteristic value includes: a compression strength value; and the division value of the test pressure value and the test area value is determined as the compression strength value of the electrode to be tested.

[0059] It should be noted that the compressive strength value of the electrode to be tested is determined by the first calculation formula, and the first calculation formula is: Where σ is the compressive strength value of the electrode to be tested, F is the test pressure value, and S is the test area value.

[0060] It is further explained that the compression rate of the electrode to be tested is determined by a second calculation formula, and the second calculation formula is: Among them, ε is the compression rate of the pole piece to be tested, Δh is the test displacement value, and h is the target thickness value.

[0061] In one embodiment, the target test value further includes: a test displacement value, and the compression characteristic value further includes: a compression rate; and the compression rate of the pole piece to be tested is determined as the division value of the test displacement value and the target thickness value.

[0062] In the embodiment of the present application, by changing the surface density value of the positive electrode sheet, ensuring that the remaining electrode sheet designs, aluminum foil and active materials are the same, a variety of schemes are generated, and by selecting multiple positive electrode test electrodes, that is, the second target electrode sheet samples mentioned in the present application, the compressive strength values ​​of the positive electrode sheets with different densities under each scheme are obtained. For example, the surface density of the positive electrode sheet of Scheme 1 is set to 43mg / cm2, the surface density of the positive electrode sheet of Scheme 2 is set to 39mg / cm2, and the surface density of the positive electrode sheet of Scheme 3 is set to 35mg / cm2, and 30 positive electrode test electrodes are selected. The electrode sheet thicknesses of Scheme 1, Scheme 2 and Scheme 3 are 137μm, 125μm and 113μm respectively. The force-displacement curves of the positive electrode sheets obtained according to each scheme are as follows: Figure 2 As shown, Scheme 1, Scheme 2 and Scheme 3 correspond to Figure 2 The L1, L2 and L3 curves in .

[0063] By changing the compaction density value of the negative electrode sheet, ensuring that the rest of the electrode sheet design, aluminum foil and active materials are the same, a variety of schemes are generated, and by selecting multiple negative electrode test electrodes, i.e., the second target electrode sample mentioned in this application, the compression strength values ​​of the negative electrode sheets with different densities under each scheme are obtained. For example, the compaction density of the negative electrode sheet of scheme four is set to 1.5g / cm3, the compaction density of the negative electrode sheet of scheme five is set to 1.6g / cm3, and the compaction density of the negative electrode sheet of scheme six is ​​set to 1.7g / cm3, and 30 negative electrode test electrodes are selected to obtain the electrode sheet thickness of scheme four, scheme five and scheme six as 142μm, 138μm and 127μm, respectively. The stress-strain curves of the negative electrode sheets obtained according to each scheme are as follows: Figure 3 The specific compression eigenvalue results are shown in Table 1, where Scheme 4, Scheme 5 and Scheme 6 correspond to Figure 3 The L4, L5 and L6 curves in .

[0064] Table 1 Negative electrode compression characteristic value results

[0065]

[0066] It should be noted that according to Figure 2 It is determined that as the surface density of the positive electrode decreases, the deformation resistance of the electrode increases, proving that the compression strength and compression rate of the electrode increase at the same time, and the electrode is not easy to deform. Figure 3The negative electrode compression characteristic value result table shows that as the negative electrode compaction density increases, the compression strength of the electrode increases, while the compression rate decreases accordingly. The compression characteristic value test method based on the electrode proposed in this application can not only compare and analyze the compression performance of a single variable, but also analyze the compression characteristic values ​​of different designs and different materials, providing support for improving the mechanical properties of lithium-ion batteries.

[0067] The present embodiment provides a method for testing the compression characteristic value based on the pole piece, wherein the method includes: punching each pole piece to be tested by a punching device to obtain a plurality of pole piece samples; selecting a first preset number of first target pole piece samples from each of the pole piece samples, and obtaining a target thickness value according to the thickness value of each of the first target pole piece samples; selecting a second preset number of second target pole piece samples from each of the pole piece samples, and testing each of the second target pole piece samples by a testing device to obtain a target test value; determining the compression characteristic value of the pole piece to be tested according to the target test value and the target thickness value. Through the provided scheme, the compression characteristic value of the pole piece of a lithium-ion battery can be accurately measured, and the test efficiency is improved.

[0068] Example 2

[0069] In addition, an embodiment of the present application provides a compression characteristic value testing device based on a pole piece.

[0070] like Figure 4 As shown, the compression characteristic value testing device 400 based on the pole piece includes:

[0071] An acquisition module 401 is used to perform a punching process on each electrode to be tested by a punching device to obtain a plurality of electrode samples;

[0072] A selection module 402 is used to select a first preset number of first target pole piece samples from each of the pole piece samples, and obtain a target thickness value according to the thickness value of each of the first target pole piece samples;

[0073] A testing module 403 is used to select a second preset number of second target pole piece samples from each of the pole piece samples, and test each of the second target pole piece samples through a testing device to obtain a target test value;

[0074] The determination module 404 is used to determine the compression characteristic value of the pole piece to be tested according to the target test value and the target thickness value.

[0075] The pole piece-based compression characteristic value testing device 400 provided in this embodiment can implement the pole piece-based compression characteristic value testing method provided in Embodiment 1, and will not be described again here to avoid repetition.

[0076] The present embodiment provides a compression characteristic value test device based on pole pieces, wherein the method includes: punching each pole piece to be tested by a punching device to obtain a plurality of pole piece samples; selecting a first preset number of first target pole piece samples from each of the pole piece samples, and obtaining a target thickness value according to the thickness value of each of the first target pole piece samples; selecting a second preset number of second target pole piece samples from each of the pole piece samples, and testing each of the second target pole piece samples by a testing device to obtain a target test value; determining the compression characteristic value of the pole piece to be tested according to the target test value and the target thickness value. Through the provided scheme, the compression characteristic value of the pole piece of a lithium-ion battery can be accurately measured, and the test efficiency is improved.

[0077] Example 3

[0078] In addition, an embodiment of the present application provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and when the computer program runs on the processor, the compression characteristic value testing method based on the pole piece provided in Example 1 is executed.

[0079] For details, see Figure 5 The electronic device 500 includes: a transceiver 501, a bus interface and a processor 502, wherein the processor 502 is used to: perform a punching process on each electrode to be tested by a punching device to obtain a plurality of electrode samples; select a first preset number of first target electrode samples from each of the electrode samples, and obtain a target thickness value according to the thickness value of each of the first target electrode samples; select a second preset number of second target electrode samples from each of the electrode samples, and test each of the second target electrode samples by a testing device to obtain a target test value; determine the compression characteristic value of the electrode to be tested according to the target test value and the target thickness value.

[0080] In one embodiment, the processor 502 is further configured to: perform a baking process on each of the electrode pieces to be tested, and perform a cooling process on each of the electrode pieces to be tested after baking.

[0081] In one embodiment, the processor 502 is further used to: perform a punching process on each of the electrode pieces to be tested by the punching device to obtain electrode piece samples to be screened; and select electrode piece samples to be screened that meet preset conditions from each of the electrode piece samples to be screened as electrode piece samples.

[0082] In one embodiment, the processor 502 is further configured to: obtain thickness values ​​of each of the first target pole piece samples, and take an average value of the thickness values ​​of each of the first target pole piece samples as the target thickness value.

[0083] In one embodiment, the processor 502 is also used to: use each of the second target pole piece samples as a first pole piece sample set, and control the test equipment to perform compression processing on the first pole piece sample set according to preset test parameters; record the compression distance value, test pressure value and loading force in real time until the first pole piece sample set is broken, or the loading force is greater than or equal to a preset loading force threshold, wherein if the attenuation degree of the loading force is greater than or equal to the preset attenuation threshold, it is judged that the first pole piece sample set is broken; obtain a force-displacement curve according to the compression distance value and the test pressure value, and obtain the target test value according to the force-displacement curve.

[0084] In one embodiment, the processor 502 is also used for: the target test value includes: a test area value and a test pressure value, the compression characteristic value includes: a compression strength value; and the division value of the test pressure value and the test area value is determined as the compression strength value of the electrode to be tested.

[0085] In one embodiment, the processor 502 is further used for: the target test value further includes: a test displacement value, the compression characteristic value further includes: a compression rate; and the division value of the test displacement value and the target thickness value is determined as the compression rate of the pole piece to be tested.

[0086] In the embodiment of the present application, the electronic device 500 further includes: a memory 503. Figure 5 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically connecting various circuits of one or more processors represented by processor 502 and memory represented by memory 503. The bus architecture may also connect various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 501 may be a plurality of components, i.e., including a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. The processor 502 is responsible for managing the bus architecture and general processing, and the memory 503 may store data used by the processor 502 when performing operations.

[0087] The electronic device 500 provided in the embodiment of the present application can execute the steps of the compression characteristic value testing method based on the pole piece provided in the above method embodiment 1, which will not be described again here to avoid repetition.

[0088] The electronic device provided in this embodiment executes the compression characteristic value test method based on the pole piece provided in embodiment 1, wherein the method includes: punching each pole piece to be tested by a punching device to obtain multiple pole piece samples; selecting a first preset number of first target pole piece samples from each of the pole piece samples, and obtaining a target thickness value according to the thickness value of each of the first target pole piece samples; selecting a second preset number of second target pole piece samples from each of the pole piece samples, and testing each of the second target pole piece samples by a testing device to obtain a target test value; determining the compression characteristic value of the pole piece to be tested according to the target test value and the target thickness value. Through the provided scheme, the compression characteristic value of the pole piece of a lithium-ion battery can be accurately measured, and the test efficiency is improved.

[0089] Example 4

[0090] The present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the compression characteristic value testing method based on the pole piece provided in Example 1 is implemented.

[0091] In this embodiment, the computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0092] The computer-readable storage medium provided in this embodiment can implement the compression characteristic value testing method based on the pole piece provided in Example 1, and will not be described again here to avoid repetition.

[0093] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or terminal including the element.

[0094] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0095] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A method for testing the compression characteristic value based on a pole piece, characterized in that: The method comprises: Punching each electrode to be tested by a punching device to obtain a plurality of electrode samples; Selecting a first preset number of first target pole piece samples from each of the pole piece samples, and obtaining a target thickness value according to the thickness value of each of the first target pole piece samples; Selecting a second preset number of second target pole piece samples from each of the pole piece samples, and testing each of the second target pole piece samples by a testing device to obtain a target test value; The compression characteristic value of the pole piece to be tested is determined according to the target test value and the target thickness value.

2. The method for testing the compression characteristic value based on the pole piece according to claim 1, characterized in that: The method of punching each electrode piece to be tested by a punching device to obtain a plurality of electrode piece samples includes: Each of the electrode pieces to be tested is subjected to a baking process, and each of the electrode pieces to be tested is subjected to a cooling process after baking.

3. The method for testing the compression characteristic value based on the pole piece according to claim 1, characterized in that: The method of punching each electrode to be tested by a punching device to obtain a plurality of electrode samples includes: Punching each of the electrode pieces to be tested by the punching device to obtain electrode piece samples to be screened; Among the electrode samples to be screened, the electrode samples to be screened that meet the preset conditions are selected as electrode samples.

4. The method for testing the compression characteristic value based on the pole piece according to claim 3, characterized in that: The step of obtaining a target thickness value according to the thickness value of each of the first target pole piece samples comprises: The thickness values ​​of the first target pole piece samples are obtained, and the average value of the thickness values ​​of the first target pole piece samples is used as the target thickness value.

5. The method for testing the compression characteristic value based on the pole piece according to claim 1, characterized in that: The selecting a second preset number of second target pole piece samples from each of the pole piece samples, and testing each of the second target pole piece samples by a testing device to obtain a target test value includes: Using each of the second target pole piece samples as a first pole piece sample set, and controlling the test device to perform compression processing on the first pole piece sample set according to preset test parameters; The compression distance value, the test pressure value and the loading force are recorded in real time until the first pole piece sample set is broken, or the loading force is greater than or equal to a preset loading force threshold, wherein if the attenuation degree of the loading force is greater than or equal to the preset attenuation threshold, it is determined that the first pole piece sample set is broken; A force-displacement curve is obtained according to the compression distance value and the test pressure value, and the target test value is obtained according to the force-displacement curve.

6. The method for testing the compression characteristic value based on the pole piece according to claim 5, characterized in that: The target test value includes: a test area value and a test pressure value, and the compression characteristic value includes: a compression strength value; The step of determining the compression characteristic value of the electrode piece to be tested according to the target test value and the target thickness value comprises: The compressive strength value of the electrode to be tested is determined as the value divided by the test pressure value and the test area value.

7. The method for testing the compression characteristic value based on the pole piece according to claim 6, characterized in that: The target test value also includes: a test displacement value, and the compression characteristic value also includes: a compression rate; The step of determining the compression characteristic value of the pole piece to be tested according to the target test value and the target thickness value further includes: The compression rate of the pole piece to be tested is determined as the division value between the test displacement value and the target thickness value.

8. A compression characteristic value test device based on a pole piece, characterized in that: The device comprises: An acquisition module is used to perform a punching process on each electrode to be tested by a punching device to obtain a plurality of electrode samples; A selection module, used for selecting a first preset number of first target pole piece samples from each of the pole piece samples, and obtaining a target thickness value according to the thickness values ​​of each of the first target pole piece samples; A testing module, used for selecting a second preset number of second target pole piece samples from each of the pole piece samples, and testing each of the second target pole piece samples through a testing device to obtain a target test value; A determination module is used to determine the compression characteristic value of the pole piece to be tested according to the target test value and the target thickness value.

9. An electronic device, characterized in that: It comprises a memory and a processor, wherein the memory stores a computer program, and when the computer program is run on the processor, the compression characteristic value testing method based on the pole piece according to any one of claims 1 to 7 is executed.

10. A computer-readable storage medium, characterized in that: It stores a computer program, which, when running on a processor, executes the compression characteristic value testing method based on a pole piece according to any one of claims 1 to 7.

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