The capacity of a battery is divided into rated capacity and actual capacity. The rated capacity of a battery means that when designing and manufacturing a battery, it is stipulated or guaranteed that the battery should discharge the minimum amount of electricity under certain discharge conditions. Li-ion stipulates that the battery should be charged for 3 hours under charging conditions controlled by room temperature, constant current (1C) and constant voltage (4.2V). The actual capacity of the battery refers to the actual amount of electricity discharged by the battery under certain discharge conditions, which is mainly affected by the discharge rate and temperature (so strictly speaking, the battery capacity should specify the charging and discharging conditions). Common units of capacity are: mAh, Ah=1000mAh).
Design and application of lithium-ion batteries for new energy vehicles
Advantages of parallel batteries
1. Parallel connection of small batteries is safer than using large batteries directly
2. Small batteries in parallel have a better current passing capacity than large batteries directly used
3. During use, the current between parallel batteries can be distributed according to the capabilities of each battery, improving the overall performance of the system.
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