Recently, oil prices have risen, and the heat of trams on the street has increased, but many people still hold a view that the battery of electric vehicles cannot be used for several years, and it will take three or four years to change the battery, and it will cost tens of thousands to change the battery once. There are not a few people who think this way, but is this really the case?
To be honest, you said that electric vehicles have a long charging time, low temperature seconds become electric daddy, high-speed endurance is greatly attenuated, why in 2022, there will be electric vehicles three or four years to change the battery idea? This is purely to complain and did not find the right place ah?
1. Cycle life of the power battery
First of all, let's talk about the cycle life of the power battery, what does the cycle life mean? It is the number of times a battery can be completely charged and discharged before it is attenuated to a certain extent.
At present, the mandatory standard of the mainland rises, when the number of power battery cycles of electric vehicles reaches 1000 times, the capacity attenuation is not less than 80% of the initial capacity, which is the passing line, in this regard, the number of cycles of lithium iron phosphate batteries is higher, that is to say, the life is longer. Lithium iron phosphate batteries, at room temperature 25 °, the cycle life can reach 2000-3000 times or even higher.
Some people say that only 1,000 times, I go home every day to recharge, less than 3 years is not a thousand times? Isn't that going to be the battery replaced? You still don't understand, what is the cycle life, from 0 charge to 100% to count as a complete cycle, you from 0 charge to 50% count half a time ah. You charge it every day when you go home, do you run out of electricity every time? If you charge only 10% of the battery per day, then charging 10 times is a complete cycle.
Of course, this life only includes electric vehicles in these two years, and the electric vehicles in previous years are far from reaching this cycle life. Because the battery technology at that time was not mature, basically hundreds of charging batteries were not durable, and those electric vehicles had a short range, which meant that the same mileage had more charging cycles.
2. The mileage life of a pure electric vehicle
With the current level of electric vehicle endurance, we assume that if an electric vehicle can run 400 kilometers with full power, 1,000 cycles is a life of 400,000 kilometers, even if you give a 20% discount, it is 320,000 kilometers. How many years does it take for ordinary households to drive to 320,000 kilometers? Even if you run 20,000 kilometers a year, you can use it for 16 years. In addition, even if 1000 charge and discharge cycles are reached, the battery is not immediately scrapped, but the capacity is attenuated by 20%.
But this also reminds us that if you run more miles every day, try to buy an electric car with large battery capacity and long range to reduce the number of charging cycles. As for running a ride-hailing car, because of the long mileage, it is unrealistic to want a battery to drive to scrapping, and it is inevitable to change the battery once every few years.
3. Data support
Some people say that you are all talking on paper, it is the life expectancy of car companies, in fact, it cannot be achieved at all, really?
Recently, an automotive media conducted a 100,000-kilometer long test, after driving 100,000 kilometers, Tesla MODEL Y and WEILAI EC6 did not have obvious battery attenuation, Weilai drove 100,000 kilometers of follow-up voyage reduced by 3.6%, taking into account individual differences and environmental differences, this attenuation is almost negligible.
According to Tesla's big data behind the scenes, teslas have an average of 90 percent of the effective battery capacity of their electric vehicles after driving 320,000 kilometers (200,000 miles).
It turns out that the battery attenuation problem really should not be the focus of your worries, rather than worrying about this problem, it is better to consider the stall problem caused by poor battery consistency, as well as the thermal runaway problem.
4. Battery warranty of major car companies
At present, the minimum quality assurance standard of the state for electric vehicle power batteries is 150,000 kilometers in 8 years, which is the minimum standard, but many car companies are higher than this standard, such as BYD, GAC, Extreme Kr and so on.
Recently, a vibrato internet celebrity attacked new energy car companies with battery warranty policies, which I think is quite funny, because its reason is that car companies have "normal attenuation of power batteries is not within the scope of the warranty" in the warranty terms, so car companies are playing word games. I doubted him, and the language was not well learned.
Isn't it normal that the warranty is guaranteed because the battery decays to a certain range? For example, BYD requires the battery to attenuate to 75% before the warranty, extreme krypton means that the battery attenuation to 70% can be required to be guaranteed by the three-pack method, you normally attenuate, that is, the attenuation is less than 30%, what do you want to do with the warranty? Therefore, some semi-hanging car critics are quite delayed, and there is no lower limit for traffic.
All in all, at this stage you buy an electric car, you can because of the long charging time, you can because of the low temperature and high-speed endurance attenuation is serious, but you don't have to veto because of the battery life problem, the data and standards are clear with you, I also admit that electric vehicles currently have many shortcomings, but always bite the battery life, really boring.