Soft pack battery is another name for lithium-ion battery. Compared with lead-acid battery, it has many advantages such as small size, light weight, high specific energy, high safety, flexible design and so on.
In the production process of the soft pack battery, before the electrolyte is injected, the main body of the soft pack battery needs to be dried. Because the separator in the main body of the soft pack battery is not resistant to high temperature, its drying temperature is not suitable to be too high. As we all know, under normal pressure, the evaporation temperature of water is above 100 ° C, and the separator in the main body of the soft battery is easily deteriorated above 90 ° C, the battery performance will decrease, the capacity will decrease, and the defective rate will increase.
Reduced economic benefits.
Therefore, in the prior art, the main body of the soft pack battery is dried under vacuum conditions, which can reduce the drying temperature, avoid damage to the main body of the soft pack battery under high temperature conditions, and reduce the defective rate. In the prior art, when the electrolyte is injected into the dried flexible battery body (i.e., the battery cell), it is performed in a positive pressure and dry environment. The trace moisture in the environment will be injected into the battery cell with the electrolyte. The excess moisture will reduce the performance of the battery, increase the rate of defective products, increase production costs, reduce economic benefits, and there is a need for improvement.
In order to overcome the above defects, an automaticproduction line for lithium batteries, an integrated production line, is provided, including an oven, a cooling glove box, a liquid injection glove box, a buffer glove box, a squeeze (static) vacuum box, a sealed glove box, and a discharge vacuum. Square cabin composition. The oven and the glove box are seamlessly connected to achieve continuous production: the oven and the glove box are seamlessly connected. After baking, the battery core is always kept in a water-free and oxygen-free glove box environment. The entire production line includes a cooling glove box, which has a fast cooling speed and low cost, ensuring that the battery cells are baked from filling to filling, and the sealing process is operated in a controlled anhydrous and oxygen-free environment, providing the most solid protection for the quality of the battery. It can realize the automatic production of batteries, greatly improve production efficiency, save human capital, and configure the MES manufacturing execution system to realize informatized production. Customers do not need to build a drying room and purchase a rotary dehumidification system, saving investment costs and operating costs.
Effectively improve production efficiency, suitable for large-scale popularization and application; In addition, the lithium battery automatic production line can realize full-automatic code scanning-injection-weighing-rehydration-sealing operation in the super purification glove box to avoid moisture in the air As the electrolyte is injected into the cells, the performance of the soft-pack battery is guaranteed, the defective rate is reduced, the degree of automation is high, and the economic benefits are improved.