1. Inconsistent internal resistance, especially polarization resistance, in lithium-ion batteries causes drastic voltage changes in individual cells during charging and discharging, resulting in drastic changes in the voltage of the entire lithium-ion battery pack;
2. Inconsistent voltages in individual ultra-thin lithium-ion battery cells will affect the peak-shaving capability of the battery pack, resulting in a reduction in the overall energy output of the battery pack;
3. Due to the heat release and absorption processes during the operation of ultra-thin batteries, the temperature of lithium-ion batteries will constantly change. When overheating occurs, it will lead to performance degradation and safety hazards. In fact, in recent years, the trigger for fires in electric vehicles during operation and testing has been inadequate overheat protection, causing the battery to overheat and catch fire. This applies not only to lithium manganese oxide batteries but also to lithium iron phosphate batteries.
4. Capacity is the most serious factor in battery life degradation. Inconsistent capacity causes two main performance problems: First, some lithium-ion batteries will be in an overcharged and over-discharged state, leading to safety hazards such as combustion and explosion. Second, low-capacity cells will stop working early, affecting the energy release of other cells in the entire ultra-thin battery pack, thus causing the entire lithium-ion battery pack to experience life degradation.
