Manufacturing device for preventing mutual dissolution of positive plate coating

Abstract

The utility model provides a manufacturing device for preventing mutual dissolution of positive plate coatings, which relates to the technical field of semiconductor material preparation and comprises a drying oven arranged between a coating machine and a receiving machine, and positive plates output by the coating machine enter the receiving machine through the drying oven; and the preheating module is arranged at the outlet of the coating machine and is used for heating the coating area of the positive plate output by the coating machine. The coating machine has the beneficial effects that the preheating module is additionally arranged after the coating machine is coated with slurry, and the surface of the coated positive plate is rapidly heated and baked, so that a ceramic material and a positive material in a coating area are rapidly dried and pre-shaped, and the two materials are prevented from being mutually dissolved in the process of being conveyed to a drying oven.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor material preparation, in particular to a manufacturing device for preventing positive electrode coatings from dissolving each other. Background Art

[0002] To prevent burrs from laser-cutting the positive electrode foil from piercing the separator and potentially causing a short circuit or even thermal runaway, the industry has adopted an effective measure: applying a ceramic coating to the tab side of the positive electrode. The key to this approach is that if the battery cell experiences temperature increases, separator shrinkage, or misalignment of the positive and negative electrode tabs, the edge of the negative electrode tab contacts the edge of the ceramic, providing insulation and effectively preventing short circuits or thermal runaway caused by direct contact with the positive tab.

[0003] However, a major challenge in the current ceramic coating process is that the ceramic slurry is prone to colloidal formation with the cathode material during the coating process, resulting in material mixing between the two different material areas. This phenomenon not only directly impairs the manufacturing quality of the cathode sheet but also seriously threatens product safety. If such anomalies occur frequently, they will not only significantly reduce production efficiency and lead to a decrease in product yield, but may also introduce hidden dangers into subsequent production links and even the final product, posing a potential threat to the safe use of the battery cell.

[0004] Therefore, the control of the ceramic coating process must be extremely strict to ensure the stability and consistency of the coating process, avoid the occurrence of material dissolution from the source, and thus ensure the manufacturing quality and safety performance of the positive electrode and even the entire battery cell. Utility Model Content

[0005] In view of the problems existing in the prior art, the present invention provides a manufacturing device for preventing the mutual dissolution of positive electrode coatings, comprising:

[0006] An oven is provided between the coating machine and the material receiving machine, and the positive electrode sheets output by the coating machine pass through the oven and enter the material receiving machine;

[0007] The preheating module is arranged at the outlet of the coating machine and is used to heat the coating area of ​​the positive electrode sheet output by the coating machine.

[0008] Preferably, the preheating module is an infrared heating module.

[0009] Preferably, the preheating module is a laser heating module.

[0010] Preferably, the heating area generated by the preheating module covers at least part of the coating area of ​​the positive electrode sheet output by the coating machine, and the coating area includes a ceramic slurry coating area and a positive electrode slurry coating area.

[0011] Preferably, the heating area covers the ceramic slurry coating area.

[0012] Preferably, the heating area covers the positive electrode slurry coating area.

[0013] Preferably, the heating area covers the ceramic slurry coating area and the positive electrode slurry coating area.

[0014] Preferably, the heating area covers the junction of the ceramic slurry coating area and the positive electrode slurry coating area.

[0015] Preferably, it also includes:

[0016] The first thickness measuring device is arranged between the oven and the coating machine.

[0017] Preferably, it also includes:

[0018] The second thickness measuring device is arranged between the drying oven and the material receiving machine.

[0019] The above technical solution has the following advantages or beneficial effects: a preheating module is added after the coating machine applies the slurry to quickly heat and bake the surface of the positive electrode sheet after coating, so that the ceramic material and the positive electrode material in the coating area are quickly dried and pre-shaped, thereby avoiding the mutual dissolution of the two materials during the process of being conveyed to the oven. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a manufacturing device for preventing mutual dissolution of positive electrode coatings in a preferred embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of a preferred embodiment of the present invention, in which the heating area covers the ceramic slurry coating area;

[0022] Figure 3 This is a schematic diagram of a preferred embodiment of the present invention, in which the heating area covers the positive electrode slurry coating area;

[0023] Figure 4 This is a schematic diagram of a preferred embodiment of the present invention, in which the heating area covers the ceramic slurry coating area and the positive electrode slurry coating area;

[0024] Figure 5 This is a schematic diagram of a preferred embodiment of the present invention, in which the heating area covers the junction of the ceramic slurry coating area and the positive electrode slurry coating area. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. The present invention is not limited to this embodiment, and other embodiments may also fall within the scope of the present invention as long as they conform to the main purpose of the present invention.

[0026] In a preferred embodiment of the present invention, based on the above-mentioned problems existing in the prior art, a device for preventing the mutual dissolution of positive electrode coatings is provided, comprising:

[0027] An oven 3 is provided between the coating machine 1 and the receiving machine 2. The positive electrode sheets outputted from the coating machine 1 pass through the oven 3 and enter the receiving machine 2.

[0028] The preheating module 4 is provided at the outlet of the coating machine 1 , and is used to heat the coating area 200 of the positive electrode sheet output by the coating machine 1 .

[0029] Specifically, in the preparation process of the prior art, after the coating machine 1 coats the ceramic slurry and the positive electrode slurry on the substrate, mutual dissolution often occurs before entering the oven 3 for baking and shaping. Therefore, in this embodiment, a preheating module 4 is added after coating to quickly heat and bake the surface of the positive electrode sheet after coating, so that the ceramic slurry and the positive electrode slurry in the coating area are quickly dried and pre-shaped, thereby avoiding mutual dissolution of the two materials during the process of being conveyed to the oven.

[0030] In a preferred embodiment of the present invention, the preheating module 4 is an infrared heating module or a laser heating module.

[0031] Specifically, in this embodiment, infrared heating or laser heating can be used to quickly dry and pre-shape the ceramic slurry and positive electrode slurry in the coating area. The specific installation position, irradiation power and width of the heating area generated by the irradiation of the preheating module 4 (parallel to the transmission direction of the positive electrode sheet) are set according to the actual needs of the production process. Generally speaking, the closer the distance between the preheating module 4 and the coating area 200, the higher the irradiation power, and the larger the width of the heating area, the better the effect of rapid drying and pre-shaping.

[0032] In a preferred embodiment of the present invention, the heating area generated by the preheating module 4 covers at least a portion of the coating area 200 of the positive electrode output by the coating machine 1. ， The coating area 200 includes a ceramic slurry coating area 210 and a positive electrode slurry coating area 220 .

[0033] Specifically, in several preferred embodiments of the present invention, there are four ways for the heating area 100 to cover the coating area 200, namely:

[0034] 1. The heating area 100 covers the ceramic slurry coating area 210.

[0035] 2. The heating area 100 covers the positive electrode slurry coating area 220 .

[0036] 3. The heating area 100 covers the ceramic slurry coating area 210 and the positive electrode slurry coating area 220.

[0037] 4. The heating area 100 covers the junction of the ceramic slurry coating area 210 and the positive electrode slurry coating area 220.

[0038] Specifically, in this embodiment, the irradiation of the additional infrared or laser heating module can be divided into four schemes, such as Figure 1 and Figure 2 As shown, the first solution is to heat and bake only the coating position of the ceramic slurry coating area 210, so that the ceramic edge is quickly shaped, and the drying and shaping of the positive electrode material area is still completed by conventional oven baking; since the actual coating size of the ceramic is small (for example, the width of the ceramic coating area in a production process is only 5mm), the volume of the additional preheating module 4 can also be reduced accordingly, reducing the equipment investment cost and reducing the equipment space occupied;

[0039] like Figure 3 As shown, the second solution is to heat and bake only the coating position of the positive electrode slurry coating area 220, so that the positive electrode sheet is quickly shaped, and the drying and shaping of the ceramic slurry coating area 210 is still completed by conventional oven baking;

[0040] like Figure 4 As shown, in Option 3, the ceramic slurry coating area 210 and the positive electrode slurry coating area 220 are simultaneously heated and baked for pre-setting. After pre-setting, the two materials no longer dissolve in the material area. Then, they are baked and dried in an oven. Since the positive electrode sheet is heated and pre-set, the time it takes for the positive electrode sheet to enter the oven for final baking and setting can be reduced, thereby improving production efficiency. Option 3 can also set different temperatures for heating and drying the ceramic slurry coating area 210 and the positive electrode slurry coating area 220 according to product design requirements such as the coating solid content and coating thickness of the ceramic slurry and positive electrode slurry.

[0041] like Figure 5 As shown, in scheme 4, the boundary between the ceramic slurry coating area 210 and the positive electrode slurry coating area 220 is heated and baked for pre-forming. After the pre-forming, the two materials no longer dissolve in each other at the boundary, and then are baked and dried in an oven.

[0042] In practice, according to the production line capacity or cost control requirements, plan one, plan two, plan three, or plan four can be adopted for production. In theory, all four methods can solve the problem of mutual dissolution of the ceramic slurry and the positive electrode slurry after coating.

[0043] In a preferred embodiment of the present invention, a first thickness measuring device 51 and a second thickness measuring device 52 are respectively provided between the drying oven 3 and the coating machine 1 and between the drying oven 3 and the material receiving machine 2 .

[0044] Specifically, in this embodiment, a first thickness measuring device 51 and a second thickness measuring device 52 are provided to detect the thickness of the positive electrode sheet before baking after coating and before collecting after baking, so as to control the molding quality and shaping effect of the positive electrode sheet and promptly discover the quality problem of the positive electrode sheet being thickened at the coating interface due to the mutual dissolution of the coating.

[0045] The above are only preferred embodiments of the present invention and do not limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of this specification and illustrations should be included in the protection scope of the present invention.

Claims

1. A manufacturing device for preventing mutual dissolution of positive electrode coatings, characterized in that: include: An oven is provided between the coating machine and the material receiving machine, and the positive electrode sheets output by the coating machine pass through the oven and enter the material receiving machine; The preheating module is arranged at the outlet of the coating machine and is used to heat the coating area of ​​the positive electrode sheet output by the coating machine.

2. The production device according to claim 1, characterized in that The preheating module is an infrared heating module.

3. The production device according to claim 1, characterized in that The preheating module is a laser heating module.

4. The production device according to claim 1, characterized in that The heating area generated by the preheating module covers at least a portion of the coating area of ​​the positive electrode sheet output by the coating machine, and the coating area includes a ceramic slurry coating area and a positive electrode slurry coating area.

5. The production device according to claim 4, characterized in that The heating area covers the ceramic slurry coating area.

6. The production device according to claim 4, characterized in that The heating area covers the positive electrode slurry coating area.

7. The production device according to claim 4, characterized in that The heating area covers the ceramic slurry coating area and the positive electrode slurry coating area.

8. The production device according to claim 4, characterized in that The heating area covers the junction of the ceramic slurry coating area and the positive electrode slurry coating area.

9. The production device according to claim 1, characterized in that Also includes: The first thickness measuring device is arranged between the oven and the coating machine.

10. The production device according to claim 1, characterized in that Also includes: The second thickness measuring device is arranged between the drying oven and the material receiving machine.

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