Pole piece detection method, pole piece detection equipment and drying system

Abstract

The invention relates to a pole piece detection method and device and a drying system, and relates to the technical field of battery manufacturing, and the pole piece detection method comprises the following steps: driving a positive plate and a negative plate to respectively abut against two opposite sides of a pole piece to form a capacitor structure; acquiring a first capacitance value of the capacitor structure; heating the pole piece to a preset temperature; acquiring a second capacitance value of the capacitor structure; if the difference value between the first capacitance value and the second capacitance value is smaller than a first preset threshold value, a first signal that the drying weight loss rate of the pole piece meets the requirement is output. According to the pole piece detection method, the pole piece detection equipment and the drying system, in the detection process, the pole piece does not need to be cut off, that is, an adhesive tape does not need to be used for bonding, and the quality of the pole piece can be effectively guaranteed.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a pole piece detection method, equipment and drying system. Background Art

[0002] Coating is the process of evenly applying the slurry to the positive and negative electrodes. Generally, in order to ensure the coating quality of the electrode, it is necessary to sample and test the electrode during the coating process. In the related art, it is usually necessary to pause the coating machine, cut a section of the electrode with a blade, and then punch it into small disc samples, and then test the samples for relevant indicators (such as coating weight, degree of drying of the slurry). After the test, the cut electrode needs to be bonded with tape, which can easily cause the bonding part to break, affecting the quality of the electrode. Summary of the Invention

[0003] In order to solve the above technical problems, the embodiments of the present application provide a pole piece detection method, equipment and drying system, which do not require cutting the pole piece during the detection process, and do not require using tape for bonding, thereby effectively ensuring the quality of the pole piece.

[0004] In a first aspect, a pole piece detection method is provided, comprising:

[0005] Driving the positive plate and the negative plate to press against opposite sides of the electrode to form a capacitor structure; wherein the side of the positive plate close to the electrode and the side of the negative plate close to the electrode are both provided with an insulating layer;

[0006] Obtaining a first capacitance value of the capacitor structure;

[0007] heating the electrode to a preset temperature;

[0008] obtaining a second capacitance value of the capacitor structure;

[0009] If the difference between the first capacitance value and the second capacitance value is smaller than a first preset threshold value, a first signal is outputted indicating that the drying weight loss rate of the electrode meets the requirements.

[0010] According to the first aspect of the present application, after obtaining the first capacitance value of the capacitor structure, the electrode detection method further includes:

[0011] If the first capacitance value is less than a second preset threshold, a second signal is outputted indicating that the coating weight of the electrode meets the requirements.

[0012] According to the first aspect of the present application, heating the electrode to a preset temperature includes:

[0013] Powering the first heating plate to transfer heat to the electrode through the positive plate; wherein the first heating plate is provided on a side of the positive plate away from the electrode; and / or,

[0014] The second heating plate is energized to transfer heat to the electrode through the negative plate; wherein the second heating plate is arranged on a side of the negative plate away from the electrode.

[0015] According to the first aspect of the present application, driving the positive plate and the negative plate to press against opposite sides of the electrode to form a capacitor structure includes:

[0016] Starting a first driving device to drive the positive electrode plate to press against one side of the electrode piece along a first direction; wherein the first driving device is connected to the positive electrode plate;

[0017] The second driving device is started to drive the negative electrode plate to press against the other side of the electrode piece along a second direction; wherein the second driving device is connected to the negative electrode plate, and the first direction is opposite to the second direction.

[0018] According to the first aspect of the present application, before driving the positive electrode plate and the negative electrode plate to press against opposite sides of the electrode piece to form a capacitor structure, the electrode piece detection method further includes:

[0019] The positive electrode plate and the negative electrode plate are driven to move synchronously relative to the electrode plate along the transmission direction of the electrode plate.

[0020] In the second aspect, a pole piece detection device is also provided, comprising:

[0021] frame;

[0022] A plate assembly, comprising a positive plate and a negative plate, wherein the positive plate and the negative plate are used to press against opposite sides of the electrode to form a capacitor structure;

[0023] a drive assembly disposed on the frame, the drive assembly being configured to drive the positive plate to move in a first direction and to drive the negative plate to move in a second direction; wherein the first direction is opposite to the second direction;

[0024] a capacitance tester connected to the positive plate and the negative plate;

[0025] An electronic device is communicatively connected to the driving assembly and the capacitance tester, and is used to execute the electrode detection method as described in the previous embodiment.

[0026] According to the second aspect of the present application, the pole piece detection device further includes:

[0027] A first heating plate is provided on a side of the positive electrode plate away from the electrode sheet; and / or,

[0028] The second heating plate is arranged on a side of the negative electrode plate away from the electrode piece.

[0029] According to a second aspect of the present application, the drive assembly includes:

[0030] a first driving device, disposed on the frame, the first driving device being connected to the positive plate via the first heating plate;

[0031] The second driving device is arranged on the frame, and the second driving device is connected to the negative electrode plate through the second heating plate.

[0032] According to the second aspect of the present application, the pole piece detection device further includes:

[0033] A moving device carries the frame, and the moving device is used to move synchronously relative to the pole piece along the transmission direction of the pole piece.

[0034] In a third aspect, a drying system is also provided, comprising:

[0035] A transmission device, used for transmitting the pole piece along a preset direction;

[0036] An oven for drying the electrode;

[0037] The electrode piece detection equipment as described in the previous embodiment is used to detect the drying weight loss rate of the electrode piece.

[0038] The electrode detection method, equipment and drying system provided in the embodiments of the present application construct a capacitor structure with a positive plate, a electrode and a negative plate, obtain a first capacitance value of the capacitor structure, heat the electrode to a preset temperature, obtain a second capacitance value of the capacitor structure, and then determine whether the drying weight loss rate of the electrode meets the requirements by comparing the difference between the first capacitance value and the second capacitance value; in the process of constructing the capacitor structure, detecting the capacitance and determining whether the drying weight loss rate meets the requirements, there is no need to cut the electrode, and there is no need to use tape for bonding, which can effectively ensure the integrity of the electrode, thereby ensuring the quality of the electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and other purposes, features, and advantages of the present application will become more apparent through a more detailed description of the embodiments of the present application in conjunction with the accompanying drawings. The accompanying drawings are intended to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the drawings, the same reference numerals generally represent the same components or steps.

[0040] Figure 1 A schematic flow chart of a pole piece detection method provided in an exemplary embodiment of the present application.

[0041] Figure 2 A flowchart of a pole piece detection method provided in another exemplary embodiment of the present application.

[0042] Figure 3 A schematic diagram of a process for heating an electrode to a preset temperature provided in an exemplary embodiment of the present application.

[0043] Figure 4 A schematic diagram of a flow chart of driving a positive plate and a negative plate to press against opposite sides of a plate to form a capacitor structure is provided in accordance with an exemplary embodiment of the present application.

[0044] Figure 5 A flowchart of a pole piece detection method provided in another exemplary embodiment of the present application.

[0045] Figure 6 A schematic structural diagram of a pole piece detection device provided in an exemplary embodiment of the present application.

[0046] Figure numerals: 400 - electrode detection equipment; 410 - frame; 420 - electrode plate assembly; 421 - positive electrode plate; 422 - negative electrode plate; 430 - driving assembly; 431 - first driving device; 432 - second driving device; 440 - capacitance tester; 450 - first heating plate; 460 - second heating plate; 500 - electrode. DETAILED DESCRIPTION

[0047] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described herein.

[0048] Figure 1 This is a flow chart of a pole piece detection method provided by an exemplary embodiment of the present application. Figure 1 As shown, the electrode detection method provided in the embodiment of the present application may include:

[0049] S110: driving the positive plate and the negative plate to press against two opposite sides of the electrode sheet to form a capacitor structure.

[0050] Specifically, an insulating layer is applied to the side of the positive plate near the electrode, and an insulating layer is also applied to the side of the negative plate near the electrode. After the positive and negative plates are pressed against opposite sides of the electrode, when voltage is applied, the positive and negative plates can be used to store charge. The electrode coated with the insulating layer can prevent the charges on the positive and negative plates from directly conducting, but an electric field can be established between the charges on the positive and negative plates. Therefore, the positive plate, negative plate, and electrode can form a capacitor structure.

[0051] It should be understood that, during the execution of step S110 , there is no need to cut the electrode piece, and there is no need to use the tape for bonding, so the electrode piece has a high degree of integrity.

[0052] S120: Obtain a first capacitance value of the capacitor structure.

[0053] Specifically, a capacitance tester may be used to detect the first capacitance value of the capacitance structure.

[0054] S130: heating the electrode to a preset temperature.

[0055] S140: Obtain a second capacitance value of the capacitor structure.

[0056] Specifically, after executing step S130 and heating the electrode, the water molecules and solvent molecules on the surface of the electrode are reduced, and correspondingly, the capacitance value of the capacitor structure will change. Therefore, after executing step S130, step S140 is executed to obtain the capacitance value of the capacitor structure after the water and solvent evaporate, that is, the second capacitance value.

[0057] The following is a further introduction through the capacitance calculation formula. The capacitance calculation formula is:

[0058] Where C represents the capacitance value; ε represents the dielectric constant of the medium between the positive plate and the negative plate; s represents the facing area of ​​the positive plate and the negative plate; k is a constant; and d represents the distance between the positive plate and the negative plate.

[0059] It should be noted that the content of water and solvent molecules on the electrode directly affects the dielectric constant ε, and thus the capacitance value. Specifically, after heating the electrode to a preset temperature, the content of water and solvent molecules on the electrode decreases, the dielectric constant ε decreases, and the capacitance value decreases accordingly. In other words, the aforementioned second capacitance value is smaller than the first capacitance value.

[0060] It should be understood that the preset temperature can be set according to actual conditions, and the embodiments of the present application do not specifically limit the preset temperature.

[0061] S150: If the difference between the first capacitance value and the second capacitance value is smaller than a first preset threshold value, a first signal is outputted indicating that the drying weight loss rate of the electrode meets the requirements.

[0062] It should be noted that the drying weight loss rate refers to the percentage of the mass of the substance after losing water or other volatile components under high-temperature drying conditions to the mass of the original sample.

[0063] In actual applications, after coating the electrode, water molecules and solvent molecules will remain on the electrode. Excessive residual water and solvent molecules will affect the performance of the electrode. Therefore, after coating, the electrode needs to be dried. In actual applications, whether the electrode is dried can be determined by the drying weight loss rate.

[0064] Specifically, execute step S150. If the difference between the first capacitance value and the second capacitance value is less than the first preset threshold value, it means that the change in the second capacitance value compared to the first capacitance value is not large, and further indicates that the dielectric constant of the electrode after heating is not large compared to the dielectric constant of the electrode before heating, which means that before the electrode is heated, the content of undried water molecules and solvent molecules in the electrode is not large. Therefore, it can be determined that the drying weight loss rate of the electrode meets the requirements and the electrode meets the drying requirements.

[0065] On the contrary, if the difference between the first capacitance value and the second capacitance value is greater than or equal to the first preset threshold, it can be determined that the drying weight loss rate of the electrode does not meet the requirements, and the electrode after coating is not dried and does not meet the operational requirements.

[0066] It should be understood that the first preset threshold can be set according to the situation. For example, the first preset threshold can be selected as 0.5, 0.8, 0.4, etc. This application does not make any specific limitation on the first preset threshold.

[0067] The electrode detection method provided in the embodiment of the present application constructs a positive plate, an electrode and a negative plate into a capacitor structure, obtains a first capacitance value of the capacitor structure, heats the electrode to a preset temperature, obtains a second capacitance value of the capacitor structure, and then determines whether the drying weight loss rate of the electrode meets the requirements by comparing the difference between the first capacitance value and the second capacitance value; in the process of constructing the capacitor structure, detecting the capacitance and determining whether the drying weight loss rate meets the requirements, there is no need to cut the electrode, and there is no need to use tape for bonding, which can effectively ensure the integrity of the electrode, thereby ensuring the quality of the electrode 500.

[0068] Figure 2 This is a flow chart of a pole piece detection method provided by another exemplary embodiment of the present application. Figure 2 As shown, after step S120, the electrode detection method further includes:

[0069] S160: If the first capacitance value is less than a second preset threshold, a second signal is outputted indicating that the coating weight of the electrode meets the requirements.

[0070] It should be noted that the coating weight of the electrode refers to the total mass of the active material layer and its auxiliary components coated on the surface of the electrode. In the capacitor structure, the coating weight of the electrode is correlated with the distance d between the positive and negative plates.

[0071] Specifically, if the coating weight of the electrode is greater and the coating thickness on the electrode surface is greater, the distance d between the positive electrode plate and the negative electrode plate will be greater after the positive electrode plate and the negative electrode plate press against the electrode plate. According to the aforementioned capacitance calculation formula, the corresponding capacitance value will be smaller.

[0072] Therefore, when executing step S160, when the first capacitance value is less than the second preset threshold, it can be considered that the coating thickness on the electrode surface meets the process requirements, and a second signal indicating that the coating weight of the electrode meets the requirements can be output accordingly.

[0073] On the contrary, if the first capacitance value is greater than or equal to the second preset threshold, it can be considered that the surface coating thickness of the electrode is small and does not meet the process requirements of the coating thickness, and a signal indicating that the coating weight of the electrode does not meet the requirements can be output.

[0074] It should be noted that, in the aforementioned process of detecting whether the coating weight meets the requirements, there is no need to cut the electrode, and there is no need to use tape for bonding, which can effectively ensure the integrity of the electrode, thereby ensuring the quality of the electrode 500.

[0075] It should be understood that the second preset threshold can be set according to actual conditions. For example, the second preset threshold can be selected as 5.5, 6, 5, etc. The embodiment of the present application does not specifically limit the second preset threshold.

[0076] In one embodiment, step S160 may be performed after step S130, after step S140, or after step S150.

[0077] Figure 3 This is a flow chart of heating the electrode to a preset temperature according to an exemplary embodiment of the present application. Figure 3 As shown, step S130 may include:

[0078] S131: Powering on the first heating plate to transfer heat to the electrode through the positive electrode plate.

[0079] Specifically, the first heating plate is arranged on the side of the positive plate away from the electrode. When the first heating plate is energized, the first heating plate generates heat, and the heat is transferred from the first heating plate to the positive plate, and then transferred to the electrode through the positive plate. In this way, the electrode can be heated.

[0080] S132: Power is supplied to the second heating plate to transfer heat to the electrode through the negative electrode plate.

[0081] Similar to the introduction of the aforementioned step S131, the second heating plate is arranged on the side of the negative plate away from the electrode. When the second heating plate is energized, the second heating plate generates heat, and the heat is transferred from the second heating plate to the negative plate, and then transferred to the electrode through the negative plate. In this way, the electrode can be heated.

[0082] In one embodiment, step S131 may be performed separately to heat the electrode to a preset temperature.

[0083] In one embodiment, step S132 may be performed separately to heat the electrode to a preset temperature.

[0084] In one embodiment, step S131 and step S132 may be performed to heat the electrode to a preset temperature. In this way, both sides of the electrode are heated simultaneously, which can improve the heating efficiency and enable the electrode to quickly reach the preset temperature.

[0085] Figure 4 A schematic diagram of a flow chart of driving the positive plate and the negative plate to press against opposite sides of the electrode to form a capacitor structure is provided in an exemplary embodiment of the present application. Figure 4 As shown, step S110 may include:

[0086] S111: starting a first driving device to drive the positive electrode plate to press against one side of the electrode sheet along a first direction.

[0087] Specifically, the first driving device is connected to the positive electrode plate. When the first driving device is started, the first driving device can drive the positive electrode plate to move along the first direction, thereby driving the positive electrode plate to press against one side of the electrode sheet.

[0088] In one embodiment, the first driving device may include a motor, an oil cylinder, an air cylinder, etc.

[0089] S112: Start the second driving device to drive the negative electrode plate to press against the other side of the electrode piece along the second direction.

[0090] Specifically, the second driving device is connected to the negative plate. When the second driving device is started, the second driving device can drive the negative plate to move along a second direction (opposite to the first direction), thereby driving the negative plate to press against one side of the electrode sheet.

[0091] In one embodiment, the second driving device may include a motor, an oil cylinder, an air cylinder, etc.

[0092] Figure 5 This is a flow chart of a pole piece detection method provided by another exemplary embodiment of the present application. Figure 5 As shown, before step S110, the pole piece detection method may further include:

[0093] S170: driving the positive electrode plate and the negative electrode plate to move synchronously relative to the electrode plate along the transmission direction of the electrode plate.

[0094] It should be noted that when the drying operation does not stop, the transmission device will continue to transmit the electrode in a preset direction to ensure the drying efficiency.

[0095] In the related art, coating and drying are continuous processes in the same production line. When testing the drying weight loss rate, coating weight and other indicators of the electrode, it is necessary to cut the electrode. Therefore, the entire production line needs to be shut down before testing, that is, both the coating station and the drying station need to be shut down, which will affect the production efficiency of the electrode.

[0096] For this reason, since the embodiment of the present application does not require cutting, bonding, and other operations on the electrode, it is only necessary to construct the capacitor structure as described above to achieve the function of detecting indicators such as the drying weight loss rate and the coating weight. Therefore, in this case, in the embodiment of the present application, step S170 is performed before the detection, and the positive plate and the negative plate can always correspond to the selected electrode without stopping the production line, thereby completing the aforementioned construction of the capacitor structure, detecting relevant parameters (such as drying weight loss rate, coating weight), and determining whether the relevant parameters (such as drying weight loss rate, coating weight) meet the process requirements. In this way, the coating efficiency of the electrode can be effectively improved.

[0097] Figure 6 This is a schematic diagram of the structure of a pole piece detection device provided by an exemplary embodiment of the present application. Figure 6 As shown, the electrode detection device 400 provided in the embodiment of the present application may include a frame 410, a plate assembly 420 and a drive assembly 430. The plate assembly 420 may include a positive plate 421 and a negative plate 422. The drive assembly 430 is arranged on the frame 410.

[0098] In practical applications, the driving assembly 430 can drive the positive plate 421 along the first direction (refer to Figure 6 The driving assembly 430 can drive the negative plate 422 to move in the second direction (refer to Figure 6 Move in the direction indicated by arrow B).

[0099] It should be understood that, under the action of the driving assembly 430 , the positive plate 421 and the negative plate 422 can respectively press against two opposite sides of the electrode piece 500 , thereby forming a capacitor structure.

[0100] like Figure 6 As shown, the electrode detection device 400 may further include a capacitance tester 440 , which is connected to the positive electrode plate 421 and the negative electrode plate 422 , and is used to detect the capacitance value of the capacitor structure.

[0101] It should be noted that the electrode detection device 400 may further include an electronic device, which is communicatively connected to the aforementioned driving component 430 and the capacitance tester 440, and the electronic device can execute the electrode detection method described in the aforementioned embodiment.

[0102] Specifically, the electronic device can control the driving assembly 430 to drive the positive plate 421 and the negative plate 422 to press against opposite sides of the electrode piece 500 to form a capacitor structure. The electronic device can receive the signal output by the capacitance tester 440 to obtain the first capacitance value and the second capacitance value, and determine whether the drying weight loss rate and coating weight of the electrode piece 500 meet the requirements based on the first capacitance value and the second capacitance value.

[0103] The electrode detection device 400 provided in the embodiment of the present application constructs a positive electrode plate 421, an electrode 500 and a negative electrode plate 422 into a capacitor structure, obtains a first capacitance value of the capacitor structure, heats the electrode to a preset temperature, obtains a second capacitance value of the capacitor structure, and then determines whether the drying weight loss rate of the electrode 500 meets the requirements by comparing the difference between the first capacitance value and the second capacitance value; in the process of constructing the capacitor structure, detecting the capacitance and determining whether the drying weight loss rate meets the requirements, the electrode 500 does not need to be cut, and there is no need to use tape for bonding, which can effectively ensure the integrity of the electrode 500, thereby ensuring the quality of the electrode 500.

[0104] like Figure 6 As shown, the electrode detection device 400 can also include a first heating plate 450 and a second heating plate 460. The first heating plate 450 is arranged on the side of the positive plate 421 away from the electrode 500, and the second heating plate 460 is arranged on the side of the negative plate 422 away from the electrode 500.

[0105] As described above, when the first heating plate 450 is powered on, it generates heat, which heats the electrode 500 through the positive plate 421 . When the second heating plate 460 is powered on, it generates heat, which heats the electrode 500 through the negative plate 422 .

[0106] In one embodiment, the first heating plate 450 and the second heating plate 460 may be flat metal structures, and the metal material may be aluminum, copper, or the like.

[0107] In one embodiment, the heating temperature of the first heating plate 450 and the second heating plate 460 can be adjusted in a range of 20°C to 200°C.

[0108] In one embodiment, a thermocouple is disposed in the first heating plate 450 . When the first heating plate 450 is energized, the thermocouple generates heat.

[0109] In one embodiment, a thermocouple is disposed in the second heating plate 460 . When the second heating plate 460 is energized, the thermocouple generates heat.

[0110] like Figure 6 As shown, the drive assembly 430 can also include a first drive device 431 and a second drive device 432. The first drive device 431 and the second drive device 432 are both arranged on the frame 410. The first drive device 431 is connected to the positive plate 421 through the first heating plate 450, and the second drive device 432 is connected to the negative plate 422 through the second heating plate 460.

[0111] That is, before the test is performed, after the first driving device 431 is activated, the first heating plate 450 can be used to drive the positive plate 421 to move in the first direction so that the positive plate 421 presses against one side of the electrode 500. Correspondingly, after the second driving device 432 is activated, the second heating plate 460 can be used to drive the negative plate 422 to move in the second direction so that the negative plate 422 presses against the other side of the electrode 500. After the test is completed, the first driving device 431 can also drive the positive plate 421 to move in the second direction through the first heating plate 450 so that the positive plate 421 is away from the current electrode 500. Correspondingly, the second driving device 432 can also drive the negative plate 422 to move in the first direction through the second heating plate 460 so that the negative plate 422 is away from the current electrode 500.

[0112] In one embodiment, the first driving device 431 and the second driving device 432 can be selected from motors, oil cylinders, air cylinders, etc.

[0113] It should be noted that the pole piece detection device 400 may further include a moving device, which can support the frame 410 , that is, the moving device can drive the frame 410 to move as a whole.

[0114] In actual application, when the production line does not stop, the transmission device will continue to move the electrode 500 along the preset direction (refer to Figure 6 In this case, by controlling the moving device to move synchronously with the electrode piece 500 along the transmission direction of the electrode piece 500 (i.e., the aforementioned preset direction), it is possible to ensure that the positive electrode plate 421 and the negative electrode plate 422 always correspond to the selected electrode piece 500 without stopping the production line, thereby completing the aforementioned purpose of constructing the capacitor structure, detecting relevant parameters (such as drying weight loss rate, coating weight), and determining whether the relevant parameters (such as drying weight loss rate, coating weight) meet the process requirements. In this way, the coating and drying efficiency of the electrode piece 500 can be effectively improved.

[0115] It should be noted that the aforementioned synchronous movement of the mobile device relative to the pole piece 500 can be understood as the mobile device and the pole piece 500 moving in the same direction and at the same speed, and the mobile device and the pole piece 500 being relatively stationary.

[0116] In one embodiment, the moving device may include a movable bracket, a conveyor belt, a transport trolley, etc.

[0117] The embodiment of the present application further provides a drying system, which may include the electrode detection device 400 as described in the previous embodiment and has all the functions of the electrode detection device 400.

[0118] The beneficial effects of the drying system provided in the embodiment of the present application can refer to the beneficial effects of the aforementioned electrode detection device 400.

[0119] It should be noted that the drying system may further include a transmission device, which may transmit the electrode 500 along a preset direction.

[0120] In one embodiment, the transmission device may include a conveyor belt, a conveyor roller, a conveyor chain, etc.

[0121] It should be noted that the drying system may further include an oven, which can dry the electrode 500 .

[0122] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0123] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0124] It should also be noted that in the apparatus, device, and method of the present application, each component or each step can be decomposed and / or recombined, and such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0125] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0126] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A pole piece detection method, characterized in that: include: Driving the positive plate and the negative plate to press against opposite sides of the electrode to form a capacitor structure; wherein the side of the positive plate close to the electrode and the side of the negative plate close to the electrode are both provided with an insulating layer; Obtaining a first capacitance value of the capacitor structure; heating the electrode to a preset temperature; obtaining a second capacitance value of the capacitor structure; If the difference between the first capacitance value and the second capacitance value is smaller than a first preset threshold value, a first signal is outputted indicating that the drying weight loss rate of the electrode meets the requirements.

2. The pole piece detection method according to claim 1, characterized in that: After obtaining the first capacitance value of the capacitor structure, the electrode detection method further includes: If the first capacitance value is less than a second preset threshold, a second signal is outputted indicating that the coating weight of the electrode meets the requirements.

3. The pole piece detection method according to claim 1, characterized in that: The step of heating the electrode to a preset temperature includes: Powering the first heating plate to transfer heat to the electrode through the positive plate; wherein the first heating plate is provided on a side of the positive plate away from the electrode; and / or, The second heating plate is powered to transfer heat to the electrode through the negative plate; wherein the second heating plate is arranged on a side of the negative plate away from the electrode.

4. The pole piece detection method according to claim 1, characterized in that: Driving the positive plate and the negative plate to press against opposite sides of the electrode to form a capacitor structure includes: Starting a first driving device to drive the positive electrode plate to press against one side of the electrode piece along a first direction; wherein the first driving device is connected to the positive electrode plate; The second driving device is started to drive the negative electrode plate to press against the other side of the electrode piece along a second direction; wherein the second driving device is connected to the negative electrode plate, and the first direction is opposite to the second direction.

5. The pole piece detection method according to any one of claims 1 to 4, characterized in that: Before driving the positive plate and the negative plate to press against opposite sides of the electrode to form a capacitor structure, the electrode detection method further includes: The positive electrode plate and the negative electrode plate are driven to move synchronously relative to the electrode plate along the transmission direction of the electrode plate.

6. A pole piece detection device, characterized in that: include: Rack(410); A plate assembly (420) comprising a positive plate (421) and a negative plate (422), wherein the positive plate (421) and the negative plate (422) are used to respectively press against two opposite sides of the electrode (500) to form a capacitor structure; a driving assembly (430) disposed on the frame (410), the driving assembly (430) being used to drive the positive plate (421) to move along a first direction, and to drive the negative plate (422) to move along a second direction; wherein the first direction is opposite to the second direction; A capacitance tester (440) connected to the positive plate (421) and the negative plate (422); An electronic device is communicatively connected to the driving component (430) and the capacitance tester (440), and the electronic device is used to perform the pole piece detection method according to any one of claims 1 to 5.

7. The pole piece detection device according to claim 6, characterized in that: The pole piece detection equipment also includes: a first heating plate (450) disposed on a side of the positive electrode plate (421) facing away from the electrode piece (500); and / or, The second heating plate (460) is provided on a side of the negative electrode plate (422) away from the electrode piece (500).

8. The pole piece detection device according to claim 7, characterized in that: The drive assembly (430) includes: A first driving device (431) is provided on the frame (410), and the first driving device (431) is connected to the positive electrode plate (421) via the first heating plate (450); A second driving device (432) is provided on the frame (410), and the second driving device (432) is connected to the negative electrode plate (422) via the second heating plate (460).

9. The pole piece detection device according to claim 6, characterized in that: The pole piece detection equipment also includes: A moving device carries the frame (410), and the moving device is used to move synchronously relative to the pole piece (500) along the transmission direction of the pole piece (500).

10. A drying system, characterized in that: include: A transmission device, used for transmitting the pole piece along a preset direction; An oven for drying the electrode; The electrode detection device according to any one of claims 6 to 9 is used to detect the drying weight loss rate of the electrode.

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