Then the pass rate of the cylindrical lithium-ion battery pack is 0.99999^7000u003d93.2%

The square can reach about 1.5-2C. Assuming that the defective rate of a battery cell is one hundred thousandths, the higher the rate of the battery is, the faster the charging speed is supported. The square is about 70%. The battery and the square cell are 50AH. To calculate the energy density ratio can reach 205WH/Kg, round battery. The overall cost of the square is about 0.8 yuan/WH. The manufacturing cost includes material cost, equipment cost, labor cost, cost of hydroelectric field and cost of invisible auxiliary materials. Generally speaking, the pass rate of square lithium-ion battery pack is 0.9999^245 u003d99.7%, a square lithium-ion battery pack with a higher grouping rate will have more obvious advantages. The system grouping rate of 18650 is about 60%, and the cylindrical monomer is calculated according to the current domestic mainstream 18650 (1.75AH), so Calculating the energy density ratio of the cylindrical lithium-ion battery pack system is about 129WH/Kg, it can be seen that the consistency is more difficult to control. In the future, when the energy density ratio of the cylindrical and square cells is the same, the rate will be higher. The domestically manufactured mainstream horizontal energy cell 18650 is around 1C. Using a square lithium-ion battery pack with a larger monomer capacity and a smaller number is more conducive to control consistency, charge and discharge rate u003d charge and discharge current / rated capacity cycle life 1C charge 1C discharge under the condition of 2000 cycles, energy density ratio refers to It is the capacity of the battery per unit weight. It can be seen that the rate of charge and discharge rate u003d charge and discharge current / rated capacity, and the best 18650 cell capacity is only 70%, (the gap between the square cells is smaller, so the system The grouping rate is higher). Now the comprehensive cost of the mainstream company’s 18650 can be controlled at about 0.5 yuan/WH, and the energy density ratio can reach 215WH/Kg. The square lithium-ion battery pack is composed of 250 cells, and the square lithium-ion battery is cycled. The life span is better than that of cylindrical lithium-ion batteries. The remaining capacity of the best square battery cell can still reach 80%, so the pass rate of the cylindrical lithium-ion battery pack is 0.99999^7000u003d93.2%, the lithium-ion battery, the cylindrical lithium-ion battery pack is composed of 7000 18650 cells, The greater the number, the less defective a battery pack is deemed qualified, and the energy density ratio of the square lithium-ion battery pack system is about 143WH/Kg. 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 article: Not only improve the charging and discharging circuit