The reason why the lithium battery of electric bicycle has the charge balance function is mainly because the lithium ion battery has the advantages of small size, high energy density, no memory effect, high cycle life, low self-discharge rate and so on.
1. The matching of the battery or the influence of the external environment leads to the difference in the battery voltage of each battery in the battery pack.
2. When the battery voltage difference between each group in series exceeds the set value, the equalization circuit is allowed to work, the equalization starts during charging, and the equalization resistor discharges the battery pack with the highest relative capacity;
3. The equalization current is the equalized absorption current value, so as to reduce the voltage rise speed of the battery pack. When the voltage difference between the battery groups in series is less than the set value, the equalization circuit is prohibited to work without any equalization.
When charging and discharging a group of e-bike lithium batteries, considering the inconsistency of each single battery, the balance measures can be taken to ensure the safety and stability. This paper mainly analyzes the importance of balance treatment, implementation method, and the relationship with protection treatment.
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