Explain the purpose of the power lithium-ion battery cap

The power lithium-ion battery module is a component battery, an important part of the power lithium-ion battery, which can protect the safety of the power lithium-ion battery, the characteristics of overvoltage, explosion-proof, and flow, but many people do not know the power battery block Effect, the technical personnel of the following land will explain the purpose of the power lithium-ion battery module for you: Power lithium-ion battery cover 1. Power lithium-ion battery with overcharge protection function, different cathode materials and electrolytes, the temperature and voltage change curve during the overcharge process different. Since the power lithium-ion battery cover has an overcharge protection function, when the overcharge reaches a certain level, the charging will be forced to stop. At this time, if the internal temperature of the power lithium-ion battery has reached a thermal runaway state and the internal pressure continues to rise, the explosion-proof membrane on the power lithium-ion battery cover will be broken down, and the power lithium-ion battery material will be ejected with high-pressure gas. 2. When the battery is short-circuited, there is a PTC protection element inside the ordinary cylindrical lithium battery cap to protect the power supply battery. The important working principle is that when a certain temperature is reached, its internal structure changes and the resistance is greatly increased to prevent battery discharge , It has the function of battery short-circuit protection. 3. Low internal resistance The power lithium-ion battery cover adopts relevant technologies such as laser welding and ultrasonic welding, combined with relevant experience in material selection, and the internal resistance (between the riveting surface and the lead) can be achieved below 0.5mm. 4. Ensure the safety performance of power lithium-ion batteries. Each specification of power lithium-ion batteries is assembled through their respective parts of laser spot welding or hot pressing. The stability of aluminum and the explosion-proof system is further improved. When the internal pressure of the power battery reaches the blasting specification When the range is specified, a large amount of material in the power lithium-ion battery is emitted through the roof pressure release hole to quickly ensure the safety performance of the power lithium-ion battery. I believe that after reading the above content, we have a certain knowledge of the purpose of the power lithium-ion battery cover, so for power lithium-ion batteries, the power lithium-ion battery cover is very important, and the use is very large. So we must pay attention to performance. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.