Pole piece coating and drying auxiliary device for button cell
By designing a coating and drying auxiliary device that includes a base plate, an unwinding roller, a scraper, a pressure plate, and a cutter, the problems of electrode curling and uneven slurry caused by coating shrinkage were solved, achieving uniform distribution and efficient cutting of the electrode sheets, and improving the consistency and cutting accuracy of the battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHU ETC BATTERY LTD
- Filing Date
- 2025-04-02
- Publication Date
- 2026-05-15
AI Technical Summary
During the drying process, coating shrinkage causes the electrode to curl, and the slurry flow on the current collector surface is uneven, affecting the consistency and performance evaluation of the electrode.
A coating and drying auxiliary device is adopted, which includes a base plate, an unwinding roller, a scraper, a pressure plate, and a cutter. The pressure plate prevents the electrode from bending, and the cutter and the unwinding roller work together to continuously supply and cut the current collector, ensuring uniform distribution of the slurry.
It improves the flatness and consistency of the electrode sheets, reduces the performance differences between cells in the same group, and improves cutting accuracy and efficiency.
Smart Images
Figure CN224237357U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lithium-ion button battery technology, specifically to an auxiliary device for coating and drying electrode sheets for button batteries. Background Technology
[0002] Button cells are widely used in the lithium battery industry due to their low cost and ease of manufacture. When developing new materials, laboratories often use button cell fabrication to evaluate their performance. By fabricating and assembling newly developed battery materials into button cell electrodes and testing their electrochemical performance, the superiority or inferiority of materials can be compared. Furthermore, button cells can provide a basis for optimizing battery manufacturing processes; changes in performance can be monitored to determine the effectiveness of improvements. Laboratory data helps in establishing industry standards, determining acceptable performance ranges for batteries, and provides important guidance for standardized production and quality control.
[0003] The electrode is a crucial component of a coin cell, consisting of a current collector and an active material coating. In laboratory fabrication, electrodes are typically coated manually with a scraper and then dried. During drying, coating shrinkage causes the electrode to curl, and the flow of slurry on the current collector surface leads to uneven distribution of the active material. This affects the consistency of the coin cell, resulting in incorrect performance evaluations and impacting material selection and optimization strategies.
[0004] Based on this, an auxiliary device for coating and drying electrode sheets for button cells is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content
[0005] The purpose of this invention is to provide an auxiliary device for coating and drying electrode sheets for button batteries, so as to solve the problems in the prior art where coating shrinkage causes electrode sheet curling and slurry flow on the current collector surface causes uneven distribution of active material during the drying process.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] An auxiliary device for coating and drying electrode sheets for button cells includes a base plate and an unwinding roller placed side by side with the base plate. A current collector is wound on the unwinding roller. A scraper is placed on the base plate. A pressure plate is rotatably mounted on one side of the upper end of the base plate via a hinge. The pressure plate rotates around the hinge axis. A cutter is provided on the side of the upper end of the base plate near the unwinding roller.
[0008] Preferably, the upper end face of the pressure plate has a U-shaped structure.
[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0010] 1. This utility model uses a pressure plate to prevent the electrode sheets from bending during the drying process in the oven, ensuring that the slurry flows evenly on the surface of the current collector, thereby reducing the performance differences between batteries in the same group and improving battery consistency.
[0011] 2. This utility model uses a cutter and an unwinding roller in combination. The unwinding roller is used to continuously supply the current collector material, while the cutter is responsible for cutting the current collector at the appropriate time to ensure that the size of the electrode sheet meets the preset requirements. This combination reduces the need for manual cutting and improves the cutting accuracy and efficiency. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model.
[0013] Figure label annotations: 1. Pressure plate; 2. Cutter; 3. Scraper; 4. Hinge; 5. Base plate; 6. Current collector; 7. Unwinding roller. Detailed Implementation
[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.
[0015] In one embodiment, such as Figure 1 As shown, an auxiliary device for coating and drying electrode sheets for button batteries includes a base plate 5 and an unwinding roller 7 placed side by side with the base plate 5. A current collector 6 is wound on the unwinding roller 7. A scraper 3 is placed on the base plate 5. A pressure plate 1 is rotatably mounted on one side of the upper end of the base plate 5 via a hinge 4. The pressure plate 1 rotates around the axis of the hinge 4. A cutter 2 is provided on the side of the upper end of the base plate 5 near the unwinding roller 7.
[0016] In this embodiment, since the pressure plate 1 is in close contact with the surface of the current collector 6, the electrode will not bend during drying.
[0017] In an optional embodiment, the upper surface of the pressure plate 1 has a U-shaped structure.
[0018] It should be noted that the U-shaped structure allows the pressure plate 1 to provide a more uniform pressure distribution when in contact with the current collector 6. This helps prevent the current collector from deforming or being damaged due to excessive local pressure during the coating process, thereby ensuring the flatness and quality of the electrode sheet.
[0019] The above embodiment discloses an auxiliary device for coating and drying electrode sheets for button batteries. First, the current collector 6 wound on the unwinding roller 7 completely covers the base plate 5. Then, the pressure plate 1 rotates around the axis of the hinge 4, so that the pressure plate 1 presses down the current collector 6. Then, the excess current collector 6 is cut off by the cutter 2. Then, slurry is poured on the current collector 6. Next, the scraper 3 is placed on the current collector 6 for coating. After coating, the entire base plate 5 and the pressure plate 1 are placed directly in the oven for drying.
[0020] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. An auxiliary device for coating and drying electrode sheets for button batteries, characterized in that, It includes a base plate (5) and an unwinding roller (7) placed side by side with the base plate (5). A current collector (6) is wound on the unwinding roller (7). A scraper (3) is placed on the base plate (5). A pressure plate (1) is rotatably installed on one side of the upper end of the base plate (5) through a hinge (4). The pressure plate (1) rotates around the axis of the hinge (4). A cutter (2) is provided on the side of the upper end of the base plate (5) near the unwinding roller (7).
2. The auxiliary device for coating and drying electrode sheets for button batteries according to claim 1, characterized in that, The upper surface of the pressure plate (1) has a U-shaped structure.