The cost of lithium-ion batteries for electric bicycles-iron lithium

From a macro point of view, the reasons for the explosion of lithium-ion batteries come from three aspects: battery cells, pack assembly, and user abuse. At present, the electric bicycle market is in an environment of vicious competition. The lower the cost, the lower the price. This is also the reason for the frequent problems of the battery. Not only the cost of the battery is kept to the minimum, but the design of the pack can also save you. province. The following is the focus of this post: The cost breakdown of lithium-ion batteries for electric bicycles contains batteries and packs. This post takes 36V10Ah Pack as an example. 1. A 10AhLFP battery cell in the battery cell: The theoretical material 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 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 total theoretical material cost; 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 material is 2.96 yuan, accounting for 11.1% of the total theoretical material cost; the amount of diaphragm material is about 0.87 square meters. Based on the market price of 6.3 yuan/square, the diaphragm cost is about 5.48 yuan, accounting for 20.5% of the total theoretical material cost; The amount of electrolyte 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 materials; the cost of the four main materials accounts for 75% of the theoretical total cost of the battery, which is consistent with The conventional battery cell is designed; based on personal technical experience of nearly 8 years, the battery made of this material system can charge and discharge 1,000 times at room temperature 0.5C without a problem. 2. The Pack part is 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 difference of the protection board is also 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 protection, 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, protection 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 calculate other pack combinations by 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.