Analysis of ways to extend the life of electric vehicle batteries

1. Try to guard against overcharge to 100%. Under normal circumstances, the optimal power range of lithium batteries is 30% to 80%. For example, when Nissan sedan sells the Leaf electric sedan, it advocates that users stop charging when it reaches 80% of the power. This may reduce the driving distance of the electric sedan, but it can effectively extend the battery life. In addition, a certain amount of battery capacity can be used for energy recovery when the electric car is braking. If the battery is fully charged or close to full charge, the braking energy recovery will be suspended in order to guard against battery overcharge. 2. Regarding pure electric cars, try to guard against full discharge to 0%. Lithium batteries are more suitable for partial discharge cycles rather than deep discharge cycles. Since lithium batteries do not have a recall effect, there is no need to worry about the impact of shallow charging and shallow discharging of the battery on the battery life. The question customers often ask is how far can electric cars go? But please try not to run out of battery to detect the driving distance of electric cars. 3. Regarding plug-in hybrid cars, consider using the climbing mode or turning off the electric mode under certain conditions. For plug-in hybrid cars such as Toyota Prius or GM Volanda, they will switch to gasoline mode after the battery power is low. Because the battery management system of the vehicle will shut down the battery system in time to guard against deep cycling. However, if there is a long climb on the travel route of the method, please open the climbing mode or close the electric mode at least 20 minutes before climbing. 4. Use the charging management system to reduce the high battery capacity. Generally speaking, a lithium battery is the most stable in a half-charged state. Therefore, how to keep the battery condition stable while ensuring that the battery power meets the travel requirements? Many electric car manufacturers or charging facility manufacturers propose to use smart charging managers to delay charging to reduce the time of high battery power conditions. The best way is to set the time to reach the required power condition at about 1 hour from the departure time. This way, on the one hand, you can beware of unexpected changes to the itinerary, on the other hand, it can also lower the battery temperature before traveling (the latter can be ignored in winter, because the charging temperature is beneficial to low-temperature applications). 4. However, there are exceptions. When the battery of an electric car is almost out of power, timely charging becomes more and more important. 5. In hot climates, try to park in the shade; in cold climates, try to park in the garage. Most electric cars have a thermal management system, insisting that the battery temperature is between -6°C and 30°C, which is very important for keeping the battery in a healthy condition. However, in high-temperature climates, if the thermal management system is not turned off after parking in the open air, the battery of the vehicle may have been exhausted by its own cooling after returning in a few hours; if the thermal management system is stopped after parking for a few minutes, the battery in the car Will be gradually warmed by the surrounding environment. Both conditions have an impact on the battery life. Another way to deal with it is to open the battery thermal management system and charge it after parking in a high-temperature climate. In this way, it can not only maintain the proper temperature of the battery, but also guard against deep discharge. 6. The form of long-term parking in advance. The relevant part of the models with storage mode can be plugged in and open the storage mode; for cars without this function, if you will not drive an electric car for more than a month. You can (1) park the car in a place where the temperature is low (but not too cold); (2) charge to 60%; (3) the battery will gradually self-discharge, when the self-discharge reaches 20% or 3 months later ( Whichever comes first), charge the battery to 60% from the beginning. 7. Reduce the number of DC fast charging. When the single charging distance of an electric car is not satisfactory for the day's trip, fast charging is very useful. However, the battery will pay a price for this convenience. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: Comparative analysis of the advantages and disadvantages of lead-acid batteries and lithium batteries