The key process and detection analysis of battery packaging

1. Tin soldering: Tin soldering is a process that uses solder wire to connect conductors together and achieve a good conduction effect. The factors that affect the quality of solder include soldering temperature, main body material, solder material and so on. The welding temperature in battery packaging is generally required to be controlled at 360±10°C. Materials that are easy to solder include gold, silver, copper, tin, nickel, steel, etc. The defects that are easy to appear in soldering are: false soldering, false soldering, over soldering, etc. 2. Plastic shell packaging (also known as ultrasonic welding and crimping): The packaging of commonly used plastic shells uses ultrasonic welding. The principle is to use ultrasonic waves to transfer energy to two contact surfaces. High-frequency vibration of the contact part generates heat, which makes the contact surface melt And bonding. The important parameters that affect ultrasonic welding are: equipment power, equipment energy, pressure, welding time, etc. Detection 1. Cell detection: conventional items include: capacity, cycle life, internal resistance, voltage, self-discharge, etc. Other items include: high temperature discharge performance, low temperature discharge performance, short circuit, nail piercing, etc. 2. Protection board: electrical performance detection parameters include: overcharge protection voltage, overcharge protection recovery voltage, overdischarge protection voltage, overdischarge protection recovery voltage, short circuit protection current, self-consumption, PCM internal resistance, etc. Shape and structure: The leaking part of the gold finger has no deviation, sinking, bright color and no spots, and the thickness of the gold layer is 0.3μm. 3. Finished battery: electrical performance test items include: charge and discharge functions, short circuit protection function, open circuit voltage, over current, identification resistance, thermistor, battery internal resistance, etc. Appearance and structure test items include: kit effect, drop test, gap, color, etc. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.