Sightseeing Bus battery packs typically consist of three individual cells connected in series. If the voltage difference between each cell is relatively large, it can lead to excessive wear and tear on the battery pack.
For example, if a cell's terminal voltage is too high, it will reach an overcharged state earlier during charging.
At this time, other battery cells have not yet reached a constant voltage state and continue charging. Over time, the overcharged cell will be damaged due to frequent overcharging.
The damaged cell will then damage other cells due to its frequently low voltage. Therefore, the voltage error between battery cells should be controlled within 0.3V.
Only when the voltage between each cell is controlled within a reasonable range can the aforementioned vicious cycle be avoided. Maintaining the proper functioning of the battery pack is crucial for ensuring the effective range of an Electric Sightseeing Car.