How to improve the safety of polymer lithium batteries?

How to improve the safety of polymer lithium batteries? With the development of technology, Grieg battery products have enriched our lives. The lithium polymer batteries used in these products have higher requirements for safety performance. So what can we do to improve the safety of polymer lithium batteries? 1. The opening pressure and sensitivity of the safety valve are important factors affecting battery safety, which can reduce the power of explosion to a certain extent; 2. Additive principle: Polymer monomer molecules are added to the electrolyte. When the charging voltage exceeds the limit, the surface of the electrode polymerizes into a thin film. 3. The diaphragm PP/PE/PP is better than PE and PP; when the battery is heated, the PE micropores in the middle layer of the inner membrane are first sealed to prevent the passage of current and play a safe purpose. 4. The structural design refers to the safety isolation measures inside the battery, including the positive and negative electrodes, the width of the electrode film, the fixed limit plate, the negative electrode plate glue at both ends, the core glue, etc. After the external short-circuit battery is fully charged, the positive and negative electrodes will be short-circuited by a conductor with a resistance less than 50mQ. Test result: There will be no fire or explosion after the battery is short-circuited. Charging of B If the battery is overcharged at 3C and 5V, it will not explode or catch fire. C. After the thermal shock battery is fully charged, put it into the temperature box, heat it to 150°C at a rate of 5°C/min, and keep it warm for 30 minutes. The battery drum shell, heating, no fire, no explosion. D. Acupuncture fixes the battery on the safety device, and fixes the battery with steel nails with a diameter of 2.5 mm. Battery leakage, heat generation, no fire, no explosion. E free drooping X, Y, and Z surfaces were dropped twice at a height of 1000mm, and the core voltage, internal resistance, capacitance, etc. were normal, no heat generation, shell and other defects. Statement: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete the previous article: Analysis of the over-welding process and requirements of the lithium battery shell