lithium battery 18650

　　What are the assembly processes for soft-packed lithium battery 18650?

　　Soft-packed lithium iron phosphate battery assembly process and method

　　Aluminum plastic film forming process

　　Soft-packed lithium battery 18650 can be designed into different sizes according to customer needs. After the outer dimensions are designed, corresponding molds need to be opened to form the aluminum plastic film. Generally, single pit punching is chosen when the battery core is thin, and double pit punching is chosen when the battery core is thick, because too much deformation on one side will break through the deformation limit of the aluminum-plastic film and cause rupture.

　　Top and side sealing process

　　Low temperature lithium iron phosphate battery 3.2V 20A -20℃ charging, -40℃ 3C discharge capacity ≥70%

　　The top and side sealing process is the first packaging process of soft-packed lithium battery 18650. Top and side sealing actually includes two processes, top sealing and side sealing. First, place the wound core into the punched pit, and then fold the packaging film in half along the dotted line. The top seal is to seal the tabs, which are metal. After formation, some cells, especially thick cells, may undergo certain deformation due to large internal stress. Therefore, some factories will set up a fixture shaping process after formation, also called fixture baking.

　　In the process of resting, forming, and clamp shaping, after the liquid injection and sealing are completed, the battery core needs to be rested first. Depending on the process, it can be divided into high-temperature resting and room-temperature resting. The purpose of resting is to let the injected The electrolyte fully wets the pole piece. Then the battery core can be used to make chemical products.

　　After the capacity is divided, the cells with qualified capacity will enter the post-processing process, including appearance inspection, yellow glue application, edge voltage detection, tab transfer welding, etc. Several processes can be added or deleted according to customer needs. The last step is OQC inspection, and then packaging and shipping.

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