Who is safer compared to lithium-ion batteries and lead-acid batteries?

Lithium-ion batteries and lead-acid batteries, which is safer? Lithium-ion batteries and lead-acid batteries, which is safer? For a long time, the safety of lithium-ion batteries and lead-acid batteries has been the focus of user debate. Batteries are safer, while others hold the opposite view. From the perspective of battery structure, the lithium-ion battery pack is basically a 18650 battery for packaging, and the lead-acid battery is basically a maintenance-free lead-acid battery with good sealing performance. The risk coefficients of the two are basically the same. Who is safe? From the perspective of battery safety protection, the battery safety valve design in 18650 can not only release excessive internal pressure, but also disconnect the battery from the external circuit, which is equivalent to the physical partition of the battery to ensure The safety of other batteries. In addition, lithium-ion battery packs are generally equipped with a BMS protection board, which can accurately control the state of each battery in the battery pack and directly solve the battery overcharge and overdischarge problems. The BMS battery management system can provide comprehensive protection for the battery, including: charge and discharge high temperature protection; single cell overcharge/overdischarge voltage protection; charge/discharge overcurrent protection; battery balance; short circuit protection; charge reminder, etc. The electrolyte of a lithium ion battery pack is a mixed solution of a lithium salt and an organic solvent, and the commercial lithium salt is lithium hexafluorophosphate. The material is easy to be thermally decomposed at high temperatures, and undergoes thermochemical reactions with trace water and organic solvents to reduce the thermal stability of the electrolyte. Power lithium-ion batteries mainly use lithium iron phosphate. The p-o bond in the lithium iron phosphate crystal is stable and difficult to decompose. Even under high temperature or overcharge conditions, it will not collapse and generate heat or form strong oxidizing substances like lithium cobalt acid, so it has good safety. According to reports, in acupuncture or short-circuit experiments, a small number of samples were found to burn, but no explosion occurred. The safety of lithium-ion battery packs is greatly improved. In contrast, lead-acid batteries lack the protection of the BMS system. Lead-acid batteries seem to have no safety protection except for the safety valve. BMS protection is almost non-existent. 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: Nine advantages of lithium iron phosphate batteries