With the rapid development of social economy, rechargeable batteries are efficient, clean and pollution-free, and lithium-ion batteries have obvious advantages in cycle life, energy density, power density and environment-friendly performance. Therefore, lithium-ion batteries are an ideal power source for future electric vehicles as well as hybrid batteries. In the small household appliance industry, built-in polymer batteries and 18650 lithium batteries are also widely used.
In the production process of lithium batteries, the cells need to be formed and separated to ensure the quality and quality of the final power products.
After a batch of lithium batteries are done, although the size is the same, the capacity of the battery will vary. Therefore, the device must be fully charged according to the specification, and then discharged (finished) according to the specified current. The time it takes to discharge the electricity multiplied by the discharge current is the capacity of the battery. Only if the tested capacity meets or is greater than the designed capacity, the lithium battery is qualified, and the battery less than the design capacity cannot be considered a qualified battery. This process of screening out qualified batteries through capacity testing is called capacity.