To answer this question, it is best to rely on data. Below is the measurement curve of different discharge depth\/cycle life of Tesla battery system found on the Internet. The experiment was measured in four cases:
1. 0%-100%, that is, full and full;
2. 50%-100%, that is, after full use half of the electricity before charging;
3. 25%-75%, that is, after it is full to 75%, stop charging, and then use to 25%, start charging;
4. 0%-50%, start from 0%, charge to 50%, stop charging, continue to use to 0%. Under the above four experimental conditions, it can be found that under the conditions of 0%-50% charging and discharging, the cycle life of the power battery is the longest, and after 3,000 charging, there is basically no attenuation, and in the deep cycle mode, after 900 cycles, the capacity decays to about 50%. Therefore, it is not necessary to fully charge the battery to improve the battery life. Of course, using less than 0% to recharge is basically unrealistic. According to the curve of the Tesla battery, it can be found that 25%-75% charge and discharge is still more reasonable.
When the electric vehicle is idle, it should be fully charged first, and then charge the battery once within 7-15 days, which can avoid battery damage caused by vulcanization and shorten the battery life.
Most charging times are 5-6 hours, and only 2 hours for fast charging. At present, due to the increasing availability of fast charging technology and electric vehicles, each electric vehicle has its own charging rhythm, and the owner may judge according to the specific use and battery capacity, in general, the battery is less than 20% to be charged in time. If the electric vehicle has just left the factory, then it is recommended that the electric vehicle battery be fully charged.
The time of charging is recommended to charge during the day will be more appropriate, because it can be more accurate to grasp the time, and it is not good to control the time of charging at night. In addition, after the battery of the electric vehicle is used for half a year, the battery should be deeply discharged every month, and after the deep discharge is over, the electric vehicle is charged immediately, and the time should be within 12 hours, which has a greater maintenance effect on the state of the electric vehicle battery power recovery.
If the electric car is not charged for a long time, it will cause damage to the battery, so it is necessary to charge the electric car for about 20 days