Winter maintenance knowledge of electric vehicle batteries

The winter maintenance of Tesla, BYD and other electric vehicle batteries must be known. Therefore, regarding the impact of low temperature on the battery, the conclusion is that although the low temperature environment has little effect on the battery discharge function, it will seriously affect the battery charging function and greatly shorten the battery life. . In addition, the low temperature also made operational recommendations for motors and air-conditioning systems. It can be said that low temperature is the enemy of electric vehicles. If the above problems are not solved, it will be difficult for electric vehicles to be promoted in low-cold areas in the north. There are two ways to solve the problem, one is to improve battery use skills, and the other is to maintain electric vehicle batteries in winter. Due to the cold weather, Tesla ran into trouble in Norway. Tesla previously reported that ModelS had problems due to the severe cold weather in Norway. Tesla also admitted that when the temperature dropped below 0 degrees Celsius, ModelS charging problems. We are working hard to solve these problems, the company's regional sales director Peter Badenf-Hansen told DagensNringsliv (DN). We are very sorry and do not want to see our Norwegian customers be affected. This problem is related to the charging cable connected to the ModelS, because the charging cable cannot be charged in cold climates. Tesla engineers have been testing how to make charging more stable. Tesla spokesperson Esben Pedersen said on Monday that the ModelS charging system is very sensitive to the Norwegian power grid. We are not blaming the Norwegian grid, Pedersen said, but this is a challenge for Tesla because the Norwegian grid is different from other countries. Tesla's technicians have introduced an update for customers to use when charging. In fact, this is not the first time that ModelS has a charging problem. Last week, Tesla said it would recall 29,000 ModelS power adapters. These adapters may overheat during charging, causing the adapters, wires, sockets to melt, and in the worst case, they will catch fire. The company's solution is to remotely push software updates to ModelS and send users an adapter with a thermal fuse for free. Similarly, the battery pack of BYD's electric car is also cold-proof. If the temperature in northern my country is lower than minus 10-20 degrees, the battery pack will freeze, which will have a great impact on battery life. Of course, electric vehicles are different from traditional fuel vehicles. The battery is very important as the power source of the vehicle, so stable maintenance knowledge must be known. The author will continue to share battery maintenance knowledge with you in the future. The battery is the power source of the electric vehicle, and also the most central component of the electric vehicle. The function of the battery directly connects with the most important data endurance of the electric vehicle. In winter, the function of the battery is greatly reduced. Why? How should consumers maintain electric vehicle batteries in winter? In terms of batteries, we often pay attention to capacity and energy density, which can be used to intuitively reflect the length of the journey. However, it is worth noting that most batteries are electrochemical products and are already related to chemistry, so their function is closely related to temperature. Let's look at the effect of temperature on battery performance. The influence of temperature on battery function ●Battery capacity has the closest relationship with stroke. How much influence does temperature have on battery capacity? As can be seen from the figure, at 100A discharge current and at a temperature of 20℃-0℃-20℃, the battery capacity drops by 1.7% and 7.7%, respectively. This means that even at a low temperature of minus 20 degrees Celsius, the battery can still reach more than 90% of its rated capacity. It can be said that the influence of temperature on battery capacity is relatively small. ●Charging time is also a major concern for electric vehicles. Compared with traditional cars, the long charging time of electric vehicles has always been a disadvantage. At low temperatures, the wind expands. According to the data provided by experts, when the charging current is 5A, the charging time at an ambient temperature of -25°C is 63% slower than that at 25°C. The influence of low temperature on the charging time cannot be ignored. Excessive charging time will seriously hinder the promotion of electric vehicles. ●Battery life is also a local concern. Temporary batteries account for a large part of the cost structure of electric vehicles. If the battery life is too short to replace the demand, it will greatly increase the cost of the car, thus losing the low-cost advantages of using electric vehicles. Unfortunately, lower ambient temperatures can have a devastating effect on battery life. According to the information provided by B. Statement: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: About Macbook battery life test