2.Impact on battery pack safety

① Increased risk of thermal runaway: When some cells are overcharged or over-discharged, they are prone to overheating and even thermal runaway. Thermal runaway may cause the battery pack to smoke, catch fire or explode, posing a serious safety threat to the equipment and users.

② Shortened battery life: As some cells undergo more charge and discharge cycles, their lifespan will be relatively shortened. This will reduce the lifespan of the entire battery pack and increase the cost and frequency of battery replacement.

3. Impact on the life of the battery pack

① Unbalanced charging and discharging: The inconsistency between single cells will cause some batteries to be overcharged or over-discharged, accelerating the aging process of the battery. This will shorten the overall life of the battery pack and fail to meet the design life requirements.

② Single cell failure affects the whole: If one or more single cells fail prematurely, it may trigger a chain reaction, causing the performance of other normal batteries to deteriorate. This further shortens the service life of the battery pack and increases maintenance costs.

4. Methods to improve the consistency of battery cells

① Cell selection and screening: When purchasing cells, cells of the same brand, batch and specification should be selected, and strict screening and testing should be carried out to ensure the closeness of performance parameters.

② Balanced charging technology: The use of balanced charging technology can accurately control each cell in the battery pack to achieve the same charging state. This helps to reduce voltage differences and improve cell consistency.

③ Regular inspection and maintenance: Regularly inspect the battery pack, including the measurement of parameters such as voltage, capacity, and internal resistance. Timely discover and deal with the inconsistency of single cells, and maintain the health of the battery pack through equalization or replacement.