What is the important reason for the explosion of a lithium ion battery

Lithium-ion battery blasting occurs from three sources: batteries, pack assembly, and user abuse. 1. A 10AhLFP battery cell in the battery cell: The theoretical data cost of the battery cell is 26.7 yuan, and the yield rate can generally reach 90%. The labor cost and management cost are about 0.5 yuan/Ah, so the total cost of the battery cell unit is 34.7 yuan; the amount of positive electrode active material LFP is about 85g, based on the market price of 70 yuan/Kg, the active material cost is 5.95 yuan, accounting for 22.3% of the theoretical total cost of the material; the amount of negative electrode active material is about 39.4g, based on the market price of 75 yuan/Kg According to calculations, the cost of active substances is 2.96 yuan, accounting for 11.1% of the total theoretical data cost; the amount of gap data is about 0.87 square meters, based on the market price of 6.3 yuan/square, the gap cost is about 5.48 yuan, accounting for 20.5% of the total theoretical data cost; The electrolyte consumption is about 45g. According to the market price of 80 yuan/Kg, the electrolyte cost is about 5.63 yuan, accounting for 21.1% of the theoretical total cost of the data; the cost of the four main materials accounts for 75% of the theoretical total cost of the battery, which conforms to Conventional battery cell planning; according to personal experience in the past 8 years, the battery made by the data system can be charged and discharged 1,000 times at room temperature 0.5C without a problem. 2. In the Pack part, a 36V Pack, the number of LFP single cells used is 12Pcs, so the total cost of the battery is 34.7*12u003d416.4 yuan; the price of the maintenance board is also different from the sky and the underground, the general low-end board, the price is about 30 yuan/block, the functions provided are: overcharge, overdischarge, short circuit maintenance, no temperature control, no balance function, generally pure hardware boards, and the failure rate is lower than software boards. Chargers, low-end chargers are only 40 yuan / Pcs; battery box, wire and electrical components, a total of 20 yuan / pcs. Therefore, the total cost of the entire 36V10AhPack (including batteries, maintenance board, box, and charger) is: 416.4+30+40+20u003d506.4 yuan. The quotation with 20% gross profit is just over 600 yuan. You can check the other pack combinations yourself. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.