The basic structure of the battery and the key process of assembly

The basic structure of the battery The basic structure of the battery consists of three parts: the battery core, the protective plate, and the shell. 1. Batteries: Batteries are the most important part of the battery and the carrier of energy conversion. 2. Protection board: The protection board is an electronic functional module that protects the normal operation of the battery cell and prevents abnormal accidents. The important components are IC and MOS tube. The IC is a component that monitors the voltage of the cell, and the MOS tube is a switch. In the whole module, the IC controls the switching state of the MOS tube by detecting the current of the working circuit and the voltage across the battery cell, thereby controlling the charging and discharging circuit, and achieving the purpose of preventing battery overcharge, overdischarge or overcurrent. The important parameters of the protection board are: overcharge protection voltage, overcharge protection recovery voltage, overdischarge protection voltage, overdischarge protection recovery voltage, short circuit protection current, self-consumption current, PCM internal resistance, etc. The above parameters can be measured by special equipment or analog circuits. 3. Shell: The shell is a shell that fixes the battery core and the protection board together, seals and completes the matching function with the host. The outer shell is often divided into a bottom shell and a face shell. Generally, after mating with the host, the one that leaks outside is the face shell, and the other is the bottom shell. Commonly used materials for the shell are: ABS, ABS+PC, PC, etc. The important indicators to measure the shell are: color, material, fit, mechanical strength, etc. The key process of battery assembly 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. In battery assembly, the welding temperature 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 and melts the contact surface And bonding. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.