The cover process consists of three parts, which are upper, covered and dry. The unity of the three must maintain the stability of each system, so that it can ensure the coherence of the polar. This article will explain its impact on the stability of lithium batteries from the perspective of coating.

　　The slurry feed system is to transfer the slurry that is stirred to the storage tank, and then transmitted from the diaphragm pump to the transition cylinder. Output the slurry steadily, then the filtering device and iron removal device are sent to the coating equipment for coating. In the process of automatic pulp, pay attention to avoid layering in the storage tank, the level of the slurry in the transition cylinder, the stability of the screw pump, and the blockage of the filter tank should be cleared in time. The following chart shows an automated car loading system, please refer to the relevant information.

　　The covering method of lithium salt solution is: a comma scraper covering method, transmission covering method, and slit covering method. All three methods have their own characteristics. Among them, the scraper is mostly used for coating in the laboratory, and the transfer is used to coat on the 3 -C battery pack, and the slot type is covered on the power battery Mostly used for coating. The surface density, thickness, and adhesion of the pole is an important factor affecting the stability of the polar sheet. In the coating system, the manufacturing accuracy of the coating head, the stability of the screw pump conveying the slurry, the stability of the compressed gas, the stability of the speed, and the control of the dynamic tension are the key issues in the coating system.

　　Transitional slot compression type

　　Extreme boots drying system is a dry device with several stoves with different temperature distribution. In the drying system, pay attention to the setting of drying temperature. When coating, if the temperature is too high, it is likely to cause extremely cracking, or if the feet are not completely dry, it will cause uneven local polarization of the battery. Essence In addition, it should also pay attention to the emergence of glue.

　　During the production of coatings, the head of the head often occurs with thin tails, thick sides, dot -shaped black spots, rough surfaces, exposing metal foil and other problems. The thickness of the head and tail can be adjusted by the opening and closing time of the coating valve or a batch valve.

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