What is important to the use and assembly of polymer lithium battery cells

1. In the use of batteries, it includes the protection of aluminum-plastic composite film, top sealing (edge u200bu200bsealing of pole handle end), side sealing, and protection of pole handle and measures to guard against mechanical impact and short circuit. 1. Aluminum-plastic composite film outer packaging protection: It is important to be wary of being damaged by sharp parts. For this reason, the environment around the battery should be cleaned up from time to time, sharp parts are prohibited from contacting or colliding with the battery cell, and gloves can be worn when taking it, and beware of fingernail scratches on the surface of the battery cell. 2. Top sealing and side sealing protection: in order to guard against damage to the top sealing and side sealing and destroy the sealing effect, it is forbidden to bend the top sealing and the side sealing; at the same time, the cell design must adopt reliable insulation isolation The measure is to guard against the butt short circuit between the negative electrode and the aluminum-plastic composite film. 3. Pole handle protection: The positive lead terminal of the polymer lithium battery cell adopts an aluminum pole handle, and the negative lead terminal uses a nickel pole handle. Because the pole handle is thin, bending should be prohibited; at the same time, the pole handle should be kept in contact with the aluminum-plastic composite film during the processing, and the ferrule film should be used to strictly isolate it. 4. Beware of mechanical shocks, such as falling, hitting, bending the battery cell and accidentally trampling on the battery. 5. It is forbidden to short-circuit the positive and negative poles with metal objects or wires. 2. After a battery cell is completed, the next step is to correctly combine the shell and the battery cell protection circuit module to make it a polymer battery. The matters needing attention in this process are: 1. Shell design: (1), enough The mechanical strength is to guard against mechanical damage to the battery cell by external forces. (2) When the battery core is installed in the shell, the sharp edges and corners of the shell should scratch the battery; (3) The aluminum-plastic composite film sandwich pure aluminum is in contact with the outside. Short circuit. 2. It is necessary to design the battery protection circuit: including the scientific setting of the highest/lowest voltage, overcurrent protection, the battery unit (single cell) needs to be protected from overcharge and overdischarge when the battery is used in combination. 3. The transfer of the positive aluminum pole handle through the nickel strip, and the connection between the battery cell and the circuit board should be performed by ultrasonic welding or spot welding technology. 4. Reliable positioning of the battery cell. After the battery cell is assembled, it should be fastened firmly in the housing and will not move, so that the entire lithium battery structure is in a consolidated state. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: How to choose 18650 lithium battery?