Pole piece detection method, device and drying system
By constructing a capacitor structure between the electrode and the positive and negative plates, and using the change in capacitance value to detect the drying weight loss rate and coating weight of the electrode, the quality damage caused by cutting and bonding in electrode testing is solved, and an efficient coating and drying process is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
- Filing Date
- 2025-04-28
- Publication Date
- 2026-07-31
AI Technical Summary
In existing technologies, electrode coating quality inspection requires cutting the electrode and using adhesive tape to bond it, which damages the quality of the electrode.
By constructing a capacitor structure with the electrode, positive plate, and negative plate, the drying weight loss rate and coating weight of the electrode are detected by the change in capacitance value, thus avoiding cutting and bonding operations.
This effectively ensures the integrity of the electrode sheets, improves coating and drying efficiency, and avoids damage to the electrode sheet quality.
Smart Images
Figure CN120594615B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery manufacturing technology, specifically to an electrode detection method, equipment, and drying system. Background Technology
[0002] Coating is the process of uniformly applying a slurry onto positive and negative electrode sheets. Generally, to ensure the coating quality, it is necessary to sample and test the electrode sheets during the coating process. In related technologies, the coating machine is typically paused, a section of the electrode sheet is cut with a blade, and then stamped into small round samples. The samples are then tested for relevant indicators (such as coating weight and slurry drying degree). After testing, the cut electrode sheets are glued together with tape, which can easily lead to breakage at the glued parts, affecting the electrode quality. Summary of the Invention
[0003] To address the aforementioned technical problems, embodiments of this application provide an electrode testing method, equipment, and drying system that eliminate the need to cut the electrode during the testing process, thus eliminating the need for adhesive tape for bonding and effectively ensuring electrode quality.
[0004] Firstly, a method for detecting electrode sheets is provided, including:
[0005] The positive and negative plates are driven to press against the opposite sides of the electrode to form a capacitor structure; wherein, the side of the positive plate near the electrode and the side of the negative plate near the electrode are provided with an insulating layer.
[0006] Obtain the first capacitance value of the capacitor structure;
[0007] The electrode is heated to a preset temperature;
[0008] Obtain the second capacitance value of the capacitor structure;
[0009] If the difference between the first capacitance value and the second capacitance value is less than a first preset threshold, a first signal is output indicating that the drying weight loss rate of the electrode meets the requirements.
[0010] According to a first aspect of this 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 the second preset threshold, a second signal is output indicating that the coating weight of the electrode meets the requirements.
[0012] According to a first aspect of this application, heating the electrode to a preset temperature includes:
[0013] The first heating plate is energized to transfer heat through the positive electrode plate to the electrode sheet; wherein the first heating plate is located on the side of the positive electrode plate opposite to the electrode sheet; and / or,
[0014] The second heating plate is energized so that heat is transferred to the electrode through the negative electrode plate; wherein the second heating plate is located on the side of the negative electrode plate opposite to the electrode.
[0015] According to a first aspect of this application, the method of driving the positive and negative plates to press against opposite sides of the electrode sheets to form a capacitor structure includes:
[0016] The first driving device is activated to drive the positive electrode plate to press against one side of the electrode sheet in a first direction; wherein the first driving device is connected to the positive electrode plate;
[0017] The second driving device is activated to drive the negative electrode plate to press against the other side of the electrode sheet in the 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 a first aspect of this application, before driving the positive and negative plates to press against opposite sides of the electrode sheet to form a capacitor structure, the electrode sheet detection method further includes:
[0019] The positive and negative plates are driven to move synchronously relative to the electrode along the transmission direction of the electrode.
[0020] Secondly, an electrode testing device is also provided, including:
[0021] frame;
[0022] An electrode assembly includes a positive electrode plate and a negative electrode plate, wherein the positive electrode plate and the negative electrode plate are used to press against opposite sides of the electrode sheet to form a capacitor structure;
[0023] A drive assembly is disposed on the frame, the drive assembly being used to drive the positive electrode plate to move along a first direction and to drive the negative electrode plate to move along a second direction; wherein the first direction and the second direction are opposite.
[0024] A capacitance tester is connected to the positive plate and the negative plate;
[0025] An electronic device, which is communicatively connected to the drive assembly and the capacitance tester, is used to perform the electrode detection method as described in the previous embodiment.
[0026] According to a second aspect of this application, the electrode testing device further includes:
[0027] A first heating plate is disposed on the side of the positive electrode plate opposite to the electrode sheet; and / or,
[0028] The second heating plate is located on the side of the negative electrode plate away from the electrode sheet.
[0029] According to a second aspect of this application, the driving component includes:
[0030] A first driving device is mounted on the frame, and the first driving device is connected to the positive electrode plate through the first heating plate.
[0031] The second driving device is mounted on the frame and is connected to the negative electrode plate via the second heating plate.
[0032] According to a second aspect of this application, the electrode testing device further includes:
[0033] A mobile device that carries the frame, the mobile device being used to move synchronously relative to the electrode along the transmission direction of the electrode.
[0034] Thirdly, a drying system is also provided, including:
[0035] A transmission device for transmitting electrode sheets along a preset direction;
[0036] An oven is used to dry the electrode sheets;
[0037] The electrode testing equipment described in the previous embodiment is used to detect the drying weight loss rate of the electrode.
[0038] The electrode detection method, equipment, and drying system provided in this application construct a capacitor structure from a positive electrode plate, an electrode sheet, and a negative electrode plate, obtain a first capacitance value of the capacitor structure, heat the electrode sheet 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 sheet 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, it is not necessary to cut the electrode sheet, and therefore there is no need to use tape for bonding, which can effectively ensure the integrity of the electrode sheet, thereby ensuring the quality of the electrode sheet. Attached Figure Description
[0039] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.
[0040] Figure 1 This is a schematic flowchart of an electrode detection method provided for an exemplary embodiment of this application.
[0041] Figure 2 A schematic flowchart of an electrode detection method provided for another exemplary embodiment of this application.
[0042] Figure 3 This is a schematic diagram of a process for heating an electrode to a preset temperature, provided as an exemplary embodiment of this application.
[0043] Figure 4 This is a schematic diagram illustrating a process for constructing a capacitor structure by driving the positive and negative plates to press against opposite sides of the electrode sheets, respectively, as an exemplary embodiment of this application.
[0044] Figure 5 A schematic flowchart of an electrode detection method provided for another exemplary embodiment of this application.
[0045] Figure 6 This is a schematic diagram of the structure of an electrode testing device provided for an exemplary embodiment of this application.
[0046] Reference numerals: 400-Electrode testing equipment; 410-Frame; 420-Electrode assembly; 421-Positive electrode plate; 422-Negative electrode plate; 430-Drive assembly; 431-First drive device; 432-Second drive device; 440-Capacitance tester; 450-First heating plate; 460-Second heating plate; 500-Electrode. Detailed Implementation
[0047] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.
[0048] Figure 1 This is a schematic flowchart of an electrode detection method provided for an exemplary embodiment of this application. Figure 1 As shown, the electrode detection method provided in this application embodiment may include:
[0049] S110: Drives the positive and negative plates to press against the opposite sides of the electrode to form a capacitor structure.
[0050] Specifically, an insulating layer is applied to the side of the positive electrode plate closest to the electrode sheet, and a corresponding insulating layer is applied to the side of the negative electrode plate closest to the electrode sheet. After the positive and negative electrodes press against the opposite sides of the electrode sheet, they can be used to store charge when a voltage is applied. The electrode sheet coated with the insulating layer can prevent the charge on the positive and negative electrodes from conducting directly; however, an electric field can be established between the charges on the positive and negative electrodes. Therefore, the positive electrode plate, negative electrode plate, and electrode sheet can form a capacitor structure.
[0051] It should be understood that during step S110, there is no need to cut the electrode sheet, and therefore no need to attach the tape, resulting in a high degree of electrode sheet integrity.
[0052] S120: Obtain the first capacitance value of the capacitor structure.
[0053] Specifically, a capacitance tester can be used to detect the first capacitance value of the capacitor structure.
[0054] S130: Heat the electrode to the preset temperature.
[0055] S140: Obtain the second capacitance value of the capacitor structure.
[0056] Specifically, after heating the electrode in step S130, the number of water molecules and solvent molecules on the surface of the electrode decreases, and the capacitance value of the capacitor structure changes accordingly. Therefore, after step S130, step S140 is executed to obtain the capacitance value of the capacitor structure after the water and solvent evaporate, which is the second capacitance value.
[0057] The following section further explains 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 and negative plates; s represents the area of the positive and negative plates facing each other; k is a constant; and d represents the distance between the positive and negative plates.
[0059] It should be noted that the content of water and solvent molecules on the electrode directly affects the dielectric constant ε, thus affecting 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. That is, the aforementioned second capacitance value is less than the first capacitance value.
[0060] It should be understood that the preset temperature can be set according to the actual situation, and the embodiments of this application do not specifically limit the preset temperature.
[0061] S150: If the difference between the first capacitance value and the second capacitance value is less than the first preset threshold, output a first signal indicating that the drying weight loss rate of the electrode meets the requirements.
[0062] It should be noted that the drying loss rate refers to the percentage of the mass of a substance after it has lost moisture or other volatile components under high-temperature drying conditions, relative to the original sample mass.
[0063] In practical applications, after coating the electrode, water molecules and solvent molecules will remain on the electrode. Excessive residue of these water and solvent molecules can affect the electrode's performance. Therefore, the electrode needs to be dried after coating. In practical applications, the drying weight loss rate can be used to determine whether the electrode is dry enough.
[0064] Specifically, in step S150, if the difference between the first capacitance value and the second capacitance value is less than the first preset threshold, it indicates that the change in the second capacitance value compared to the first capacitance value is not significant. This further indicates that the change in the dielectric constant of the electrode after heating is not significant compared to the dielectric constant of the electrode before heating. In other words, it indicates that the content of undried water molecules and solvent molecules in the electrode is not high before heating. 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] Conversely, 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, the coated electrode has not been 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 a specific limitation on the first preset threshold.
[0067] The electrode detection method provided in this application constructs a capacitor structure by combining a positive electrode plate, an electrode sheet, and a negative electrode plate, obtains a first capacitance value of the capacitor structure, heats the electrode sheet 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 sheet 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, it is not necessary to cut the electrode sheet, and therefore there is no need to use adhesive tape for bonding. This effectively ensures the integrity of the electrode sheet, thereby guaranteeing the quality of the electrode sheet.
[0068] Figure 2 This is a schematic flowchart of an electrode detection method provided as another exemplary embodiment of this application. Figure 2 As shown, after step S120, the electrode detection method further includes:
[0069] S160: If the first capacitance value is less than the second preset threshold, output a second signal 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 electrode surface. In the constructed capacitor structure, the coating weight of the electrode is related to the distance d between the aforementioned positive and negative electrodes.
[0071] Specifically, if the coating weight of the electrode is greater, the coating thickness on the electrode surface is greater, and the distance d between the positive and negative plates after the positive and negative plates press against the electrode will be greater. According to the aforementioned capacitance calculation formula, the corresponding capacitance value will be smaller.
[0072] Therefore, when step S160 is executed, if the first capacitance value is less than the second preset threshold, it can be considered that the coating thickness on the electrode surface has met the process requirements, and a second signal can be output correspondingly indicating that the coating weight of the electrode meets the requirements.
[0073] Conversely, 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 too small and does not meet the process requirements for coating thickness. In this case, a signal can be output that the coating weight of the electrode does not meet the requirements.
[0074] It should be noted that, in the process of checking whether the coating weight meets the requirements, it is not necessary to cut the electrode sheet, and therefore there is no need to use tape for bonding. This can effectively ensure the integrity of the electrode sheet, thereby ensuring the quality of the 500 electrode sheet.
[0075] It should be understood that the second preset threshold can be set according to the actual situation. For example, the second preset threshold can be selected as 5.5, 6, 5, etc. The embodiments of this application do 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 schematic diagram illustrating the process of heating an electrode to a preset temperature, as provided in an exemplary embodiment of this application. Figure 3 As shown, step S130 may include:
[0078] S131: Power on the first heating plate so that heat is transferred to the electrode through the positive plate.
[0079] Specifically, the first heating plate is located on the side of the positive electrode plate away from the electrode sheet. When the first heating plate is energized, it generates heat. The heat is transferred from the first heating plate to the positive electrode plate, and then through the positive electrode plate to the electrode sheet. In this way, the electrode sheet can be heated.
[0080] S132: Power on the second heating plate so that heat is transferred to the electrode through the negative plate.
[0081] Similar to the description of step S131 above, the second heating plate is located on the side of the negative electrode plate away from the electrode sheet. When the second heating plate is energized, it generates heat. The heat is transferred from the second heating plate to the negative electrode plate, and then through the negative electrode plate to the electrode sheet. In this way, the electrode sheet can be heated.
[0082] In one embodiment, step S131 can be performed separately to heat the electrode to a preset temperature.
[0083] In one embodiment, step S132 can be performed separately to heat the electrode to a preset temperature.
[0084] In one embodiment, steps S131 and S132 can be performed to heat the electrode to a preset temperature. In this way, both sides of the electrode are heated at the same time, which can improve the heating efficiency and enable the electrode to quickly reach the preset temperature.
[0085] Figure 4 This is a schematic diagram illustrating a process for constructing a capacitor structure by driving the positive and negative plates to press against opposite sides of the electrode sheets, as provided in an exemplary embodiment of this application. Figure 4 As shown, step S110 may include:
[0086] S111: Activate the first driving device to drive the positive electrode plate to press against one side of the electrode sheet in the first direction.
[0087] Specifically, the first driving device is connected to the positive electrode plate. When the first driving device is activated, it can drive the positive electrode plate to move along the first direction, thereby causing 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, a hydraulic cylinder, a pneumatic cylinder, etc.
[0089] S112: Activate the second drive device to drive the negative electrode plate to press against the other side of the electrode sheet in the second direction.
[0090] Specifically, the second driving device is connected to the negative electrode plate. When the second driving device is activated, it can drive the negative electrode plate to move along the second direction (opposite to the first direction), thereby causing the negative electrode plate to press against one side of the electrode sheet.
[0091] In one embodiment, the second driving device may include a motor, a hydraulic cylinder, a pneumatic cylinder, etc.
[0092] Figure 5 This is a schematic flowchart of an electrode detection method provided as another exemplary embodiment of this application. Figure 5 As shown, before step S110, the electrode detection method may further include:
[0093] S170: Drives the positive and negative plates to move synchronously relative to the electrode along the transmission direction of the electrode.
[0094] It should be noted that, without stopping the drying operation, the conveying device will continuously transport the electrode sheets along the preset direction to ensure drying efficiency.
[0095] In related technologies, coating and drying are continuous processes in the same production line. Currently, when testing indicators such as drying weight loss rate and coating weight of electrode sheets, the electrode sheets need to be cut. 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. This will affect the production efficiency of electrode sheets.
[0096] Therefore, since this embodiment does not require cutting or bonding of the electrode sheets, but only requires constructing the capacitor structure as described above, it is sufficient to detect indicators such as drying weight loss and coating weight. Thus, in this embodiment, executing step S170 before detection ensures that the positive and negative electrode plates always correspond to the selected electrode sheets without stopping the production line. This achieves the aforementioned objectives of constructing the capacitor structure, detecting relevant parameters (e.g., drying weight loss and coating weight), and determining whether the relevant parameters (e.g., drying weight loss and coating weight) meet process requirements. This effectively improves the coating efficiency of the electrode sheets.
[0097] Figure 6 This is a schematic diagram of the structure of an electrode testing device provided for an exemplary embodiment of this application. Figure 6 As shown, the electrode testing device 400 provided in this application embodiment may include a frame 410, an electrode assembly 420, and a drive assembly 430. The electrode assembly 420 may include a positive electrode 421 and a negative electrode 422, and the drive assembly 430 is disposed on the frame 410.
[0098] In practical applications, the drive component 430 can drive the positive electrode plate 421 along a first direction (reference). Figure 6 (in the direction indicated by the middle arrow A) moves, and the drive assembly 430 can drive the negative electrode plate 422 along the second direction (refer to...) Figure 6 Move in the direction indicated by the middle arrow B.
[0099] It should be understood that, under the action of the driving component 430, the positive plate 421 and the negative plate 422 can press against the opposite sides of the electrode 500 respectively, thereby forming a capacitor structure.
[0100] like Figure 6 As shown, the electrode testing device 400 may also include a capacitance tester 440, which is connected to the positive electrode plate 421 and the negative electrode plate 422. The capacitance tester 440 is used to test the capacitance value of the capacitor structure.
[0101] It should be noted that the electrode testing device 400 may also include an electronic device, which is communicatively connected to the aforementioned drive component 430 and capacitance tester 440. The electronic device can perform the electrode testing method described in the foregoing embodiments.
[0102] Specifically, the electronic device can control the drive assembly 430 to drive the positive electrode plate 421 and the negative electrode plate 422 to press against the opposite sides of the electrode 500 to form a capacitor structure. The electronic device can receive the signal output by the capacitance tester 440 to obtain the aforementioned first capacitance value and second capacitance value, and determine whether the drying weight loss rate and coating weight of the electrode 500 meet the requirements based on the first capacitance value and the second capacitance value.
[0103] The electrode testing device 400 provided in this application embodiment constructs a capacitor structure by forming a positive electrode plate 421, an electrode 500, and a negative electrode plate 422, 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, it is not necessary to cut the electrode 500, and therefore 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 testing device 400 may further include a first heating plate 450 and a second heating plate 460. The first heating plate 450 is disposed on the side of the positive electrode plate 421 away from the electrode 500, and the second heating plate 460 is disposed on the side of the negative electrode 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 electrode plate 421. When the second heating plate 460 is powered on, it generates heat, which heats the electrode 500 through the negative electrode plate 422.
[0106] In one embodiment, the first heating plate 450 and the second heating plate 460 can be flat metal structures, and the metal material can be aluminum, copper, etc.
[0107] In one embodiment, the heating temperature of the first heating plate 450 and the second heating plate 460 is adjustable in the range of 20°C to 200°C.
[0108] In one embodiment, a thermocouple is provided inside the first heating plate 450. When the first heating plate 450 is energized, the thermocouple will generate heat.
[0109] In one embodiment, a thermocouple is provided inside the second heating plate 460. When the second heating plate 460 is energized, the thermocouple will generate heat.
[0110] like Figure 6 As shown, the drive assembly 430 may further include a first drive device 431 and a second drive device 432. Both the first drive device 431 and the second drive device 432 are mounted on the frame 410. The first drive device 431 is connected to the positive electrode plate 421 through the first heating plate 450, and the second drive device 432 is connected to the negative electrode plate 422 through the second heating plate 460.
[0111] In other words, before testing, after the first driving device 431 is activated, it can move the positive electrode plate 421 along the first direction via the first heating plate 450, so that the positive electrode plate 421 presses against one side of the electrode 500. Correspondingly, after the second driving device 432 is activated, it can move the negative electrode plate 422 along the second direction via the second heating plate 460, so that the negative electrode plate 422 presses against the other side of the electrode 500. After testing is completed, the first driving device 431 can also move the positive electrode plate 421 along the second direction via the first heating plate 450, so that the positive electrode plate 421 moves away from the current electrode 500. Correspondingly, the second driving device 432 can also move the negative electrode plate 422 along the first direction via the second heating plate 460, so that the negative electrode plate 422 moves away from the current electrode 500.
[0112] In one embodiment, the first drive device 431 and the second drive device 432 may be selected from motors, hydraulic cylinders, pneumatic cylinders, etc.
[0113] It should be noted that the electrode testing equipment 400 may also 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 practical applications, without shutting down the production line, the transmission device will continuously move the electrode 500 along a preset direction (see reference). Figure 6 The transfer proceeds in the direction indicated by the middle arrow C. In this case, by controlling the moving device to move synchronously relative to the electrode 500 along the transfer direction (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 500 without stopping the production line. This achieves the aforementioned objectives of constructing the capacitor structure, detecting relevant parameters (such as drying weight loss rate and coating weight), and determining whether the relevant parameters (such as drying weight loss rate and coating weight) meet the process requirements. In this way, the coating and drying efficiency of the electrode 500 can be effectively improved.
[0115] It should be noted that the aforementioned synchronous movement of the moving device relative to the electrode 500 can be understood as the moving device and the electrode 500 moving in the same direction and at the same speed, while the moving device and the electrode 500 are relatively stationary.
[0116] In one embodiment, the mobile device may include a movable support, a conveyor belt, a transport trolley, etc.
[0117] This application embodiment also provides a drying system, which may include the electrode testing device 400 as described in the previous embodiment, and has all the functions of the electrode testing device 400.
[0118] The beneficial effects of the drying system provided in this application embodiment can be seen in the beneficial effects of the aforementioned electrode testing device 400.
[0119] It should be noted that the drying system may also include a conveying device, which can convey the electrode sheet 500 along a preset direction.
[0120] In one embodiment, the conveying device may include a conveyor belt, conveyor rollers, conveyor chain, etc.
[0121] It should be noted that the drying system may also include an oven, which can dry the electrode 500.
[0122] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.
[0123] The block diagrams of devices, apparatuses, devices, 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 those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.
[0124] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.
[0125] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this 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 given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary 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 method for detecting electrode sheets, characterized in that, include: The positive and negative plates are driven to move synchronously relative to the electrode along the transmission direction of the electrode sheet; The positive electrode plate and the negative electrode plate are driven to press against the opposite sides of the electrode to form a capacitor structure; wherein, the side of the positive electrode plate near the electrode and the side of the negative electrode plate near the electrode are both provided with an insulating layer; Obtain the first capacitance value of the capacitor structure; The electrode is heated to a preset temperature; Obtain the second capacitance value of the capacitor structure; If the difference between the first capacitance value and the second capacitance value is less than a first preset threshold, a first signal is output that the drying weight loss rate of the electrode meets the requirements. Heating the electrode to a preset temperature includes: The first heating plate is energized to transfer heat through the positive electrode plate to the electrode sheet; wherein the first heating plate is located on the side of the positive electrode plate opposite to the electrode sheet; and / or, The second heating plate is energized so that heat is transferred to the electrode through the negative electrode plate; wherein the second heating plate is located on the side of the negative electrode plate opposite to the electrode.
2. The electrode 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 the second preset threshold, a second signal is output indicating that the coating weight of the electrode meets the requirements.
3. The electrode detection method according to claim 1, characterized in that, The process of driving the positive and negative plates to press against opposite sides of the electrode sheets to form a capacitor structure includes: The first driving device is activated to drive the positive electrode plate to press against one side of the electrode sheet in a first direction; wherein the first driving device is connected to the positive electrode plate; The second driving device is activated to drive the negative electrode plate to press against the other side of the electrode sheet in the second direction; wherein the second driving device is connected to the negative electrode plate, and the first direction is opposite to the second direction.
4. An electrode testing device, characterized in that, include: Rack (410); The electrode assembly (420) includes a positive electrode plate (421) and a negative electrode plate (422), wherein the positive electrode plate (421) and the negative electrode plate (422) are used to press against opposite sides of the electrode sheet (500) to form a capacitor structure; A drive assembly (430) is disposed on the frame (410). The drive assembly (430) is used to drive the positive electrode plate (421) to move along a first direction and to drive the negative electrode plate (422) to move along a second direction; wherein the first direction is opposite to the second direction. A capacitance tester (440) is connected to the positive plate (421) and the negative plate (422). An electronic device, communicatively connected to the drive assembly (430) and the capacitance tester (440), the electronic device being used to perform the electrode detection method as described in any one of claims 1 to 3.
5. The electrode testing equipment according to claim 4, characterized in that, The electrode testing equipment also includes: A first heating plate (450) is disposed on the side of the positive electrode plate (421) opposite to the electrode sheet (500); and / or, The second heating plate (460) is located on the side of the negative electrode plate (422) away from the electrode (500).
6. The electrode testing equipment according to claim 5, characterized in that, The drive component (430) includes: The first driving device (431) is mounted on the frame (410), and the first driving device (431) is connected to the positive electrode plate (421) through the first heating plate (450); The second drive device (432) is mounted on the frame (410) and is connected to the negative electrode plate (422) via the second heating plate (460).
7. The electrode testing equipment according to claim 4, characterized in that, The electrode testing equipment also includes: A mobile device that carries the frame (410) is used to move synchronously relative to the electrode (500) along the transmission direction of the electrode (500).
8. A drying system, characterized in that, include: A transmission device for transmitting electrode sheets along a preset direction; An oven is used to dry the electrode sheets; The electrode testing device according to any one of claims 4 to 7 is used to detect the drying weight loss rate of the electrode.