Electric vehicle battery life, how long is the battery life of new energy vehicles

by:CTECHi     2021-09-10
How long is the life of lithium-ion batteries for electric vehicles, and how long is the life of new energy vehicles? Nowadays, electric vehicles and new energy vehicles are increasingly developing in the direction of high-end intelligence. Electric vehicle Ru0026D and manufacturing technologies are constantly improving, and new energy vehicle manufacturing processes are becoming more mature. But there is a drawback that has always restricted the development of electric vehicles and new energy vehicles, and that is batteries! Lithium-ion battery life of electric vehicles The current brands of lithium-ion batteries are diversified. In terms of power performance, they are similar to lead-acid batteries. They can be charged for 6-8 hours and can run 30-45 kilometers depending on the battery capacity. The weight is only 1 of that of lead-acid batteries. /5 or so, and currently the general lithium-ion battery is guaranteed for 2 years, and the lead-acid battery is guaranteed for 1 year. The lithium-ion battery is charged and discharged at a rate of 1C, and its cycle life is greater than or equal to 500 times. The electric capacity at the 500th cycle is greater than 70% of the nominal copper beam. And even if the lead-acid battery is discharged at 0.5 and charged at 0.15C, its cycle life is less than or equal to 350 times, and the capacity is less than or equal to 60%. The lithium battery needs to be replaced after the end of its life. The so-called 500 times means that lithium-ion battery manufacturers have achieved about 625 rechargeable times at a constant depth of discharge, reaching 500 charging cycles. Due to various influences in real life, especially the depth of discharge during charging is not constant, '500 charging cycles' can only be used as a reference battery life. If you want lithium-ion batteries to last longer, pay attention to the four taboos! 1. Temperature: Li-ion batteries are afraid of high temperatures. Long-term overheating will greatly reduce the life of lithium-ion batteries. In severe cases, the internal pressure will increase and cause an explosion. Even if there is no explosion, the lithium-ion battery will quickly become scrapped in high heat. Most of the reason is because of the working environment. Caused by the high temperature. 2. High current: If the battery cell is lower than the electric vehicle discharge current, the temperature of the lithium-ion battery will be too high, the current will be too large and the life will be shortened, and there will be bulging and scrapping. If your electric car has a very high power and a very fast speed It is recommended to choose 18650 batteries with 10C current, so it is obviously very important to choose the right batteries! 3. Fully charged storage: Generally, it is best to store the lithium-ion battery of electric vehicles for a long time, and it is best to charge it to 50%. Long storage time will reduce the capacity of the lithium-ion battery. It is also important to pay attention to choosing a better quality protection board. The biggest taboo of lithium-ion batteries is overshoot and overdischarge. Ternary lithium will be scrapped once overdischarged, and overshoot must also be scrapped. 4. Appropriate charging equipment: When charging and discharging, the current of the charger and the general current load of the electrical appliance should be within the specified range. Excessive current load can easily cause the internal short circuit of the battery, thereby destroying the lithium ion and causing The safety hazard of the circuit, so we should pay attention to see if the charger is qualified when using the charger. How long is the battery life of a new energy vehicle? Fuel vehicles are more common in life, but with the progress of the times, many people have begun to accept new energy vehicles, because this new type of vehicle has very obvious advantages. Refueling saves part of the cost, and there is no need to go to 4s stores for maintenance. In order to make new energy vehicles popular with the public as soon as possible, the state also has corresponding subsidy policies that can save the cost of buying a car. New energy vehicles now mainly use ternary lithium-ion batteries and iron phosphate batteries. Generally speaking, lithium iron phosphate batteries can be cycled for about 2000 times, while current ternary lithium-ion batteries can generally be cycled for about 1400 times. The cycle life of the battery is directly related to the operating temperature of the battery. When charging in different cycles, different depths of discharge also have a very large impact on the cycle life of the battery. In the 0%-50% cycle mode, the battery life can reach more than 3000 times, while in the deep cycle, after less than 900 times, it decays to less than 50%. When new energy vehicles are not used for a long time, they must be charged frequently. The characteristics of the battery determine that the life expectancy will decrease quickly when the battery is in a state of long-term power loss. Therefore, when the electric vehicle is not used for a long time, it must be charged frequently to ensure that the battery is fully charged. With the development of lithium-ion battery technology, it has been possible to charge and use the battery at any time, instead of charging it when it is used up as before, so that the battery can always be in an active state. The second is to drive at a constant speed as much as possible. Electric vehicles are the same as traditional fuel vehicles, and driving at a constant speed is conducive to protecting the three-electric system. Generally speaking, the lifespan of lithium-ion batteries is determined when they leave the factory, but it is found in the course of use that they often fail to reach the ideal life limit, and the battery has problems. This requires us to take some measures during actual use. Measures to protect the battery and extend its service life.
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