1. Serious sulfurization and water loss, short circuit and open circuit of electrode plate, broken cell of single battery, poor consistency of electric vehicle battery pack and other battery failures are the main reasons for short running kilometers of electric vehicle lithium battery.

2. Temperature decrease: when the temperature of lithium battery increases, the activity of active substances increases, and as soon as the oxygen evolution potential of the positive electrode decreases, the oxygen evolution potential of the negative electrode also decreases, so the charging reaction speed is fast, the charging current is large, and the charging voltage required during charging is low.

3. Problems with electric vehicles: the common low tire pressure will increase the resistance when riding and increase the power consumption, so the endurance will be low, and poor brake adjustment will also produce driving resistance; In addition to the battery, the motor is also the core of an electric vehicle. If the motor is worn and the motor bearing is stuck, and the magnetic steel of the motor is demagnetized seriously, it will lead to serious discharge, and accelerate the consumption of battery power, resulting in shorter endurance.

4. Resistance problem: The capacity of lithium battery itself has not changed. The change is that the resistance becomes larger. Compared with the resistance in summer and winter, the resistance becomes larger. To achieve the same power, you can only increase the current output. Therefore, with the same capacity, the battery seems to consume quickly. In addition, the internal resistance of lithium battery is related to the temperature. The lower the temperature is, the higher the internal resistance is. Therefore, it will be consumed very quickly in winter.

5. Charger: Chargers play a very important role in the lithium battery of electric vehicles. Some people do not use original chargers to charge electric vehicles. If the chargers are not original, it is difficult to "fully charge" the batteries in the real sense when charging, and the discoloration of the charger indicator light may not be a real full charge, so using non original chargers will cause a "false full charge" phenomenon, The driving range will be shorter when riding.