Analyze several lithium battery capacity detection methods

1. The actual use of the method of detecting the capacity of the lithium battery, although this method is relatively simple, but the operation requirements are relatively high. The detailed operations are as follows: (1) Prepare a current flow meter and an electrical appliance marked with rated working current and voltage requirements. For example, the rated working current of the product is 2A, the symbol is I, the voltage is 12V, and the symbol is V; (2) Purchase One or several 12V lithium batteries of different brands with a permissible discharge current of 2A or above, the battery capacity should be the same, such as 6000mAh, the symbol is C; (3) Connect the battery to the electrical appliance and install the current flow If the working time is T (the difficulty lies in the difficulty of controlling the rated working efficiency of the electrical appliances); then it can be detected The battery capacity of the lithium battery is: Cu003dIT2. Use the formula to calculate and estimate the capacity of the lithium battery. The capacity of the lithium battery is related to the model size and depends on the thickness, width and length of the battery. It is also related to the material and size of the battery. The actual calculation formula of polymer lithium battery capacity is very complicated, and the relationship with volume is not linear. Many factors should be considered, such as different materials, which have a great impact on the actual capacity. The larger the size, the larger the capacity/volume ratio. To quickly estimate the capacity of polymer batteries, the commonly used estimation formula (estimation only): capacityu003dthickness*width*length*K (K unit is mah/mm3) The range of K value is (0.07~0.11), and the K value depends on For the material industry and the size of the capacity, the larger the capacity, the larger the K value, the smaller the capacity, the smaller the K value (it can be understood that the larger the size, the larger the K value). In actual calculations, the K value can be set to 0.1 by default. For example, 103450LP (thickness 10mm, width 34mm, length 50mm), calculated capacityu003d10*34*50*0.1u003d1700, the actual capacity is above 1800mah; for example, 603048LP (thickness 6mm, width 30mm, length 48mm), calculated capacityu003d6* 30*48*0.1u003d864, the actual capacity can be 900mah. 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 post: Do you know what kinds of explosion-proof technologies for explosion-proof lithium batteries?