Technical detailed: How much is the dynamic lithium-ion battery attenuation, how long does it take to replace the battery?

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - អ្នកផ្គត់ផ្គង់ស្ថានីយ៍ថាមពលចល័ត

First, it is clear that there is the same point of view, the power lithium-ion battery and mobile phone have the same decay, and the difference is that electric cars will be slower, while mobile phones often have a clear attenuation in two years. So how is the attenuation of the car power lithium-ion battery? The industry stipulates that the battery declines to 80% of the original value, replacing the replacement standard. At present, there are two mainstream dynamic lithium-ion batteries.

Let's see it: one is the three yuan lithium ion represented by Tesla. Battery, its energy density is higher, small in size, but due to heat dissipation is a big problem, it is necessary to install water-cooled heat-cooling system in additional space and quality, and is not as good as iron batteries. In addition, its battery is faster, about 800-1200 complete charging cycles, attenuation by 20%.

It means full charging, only 0-100% charging is only once, if the electricity is from 50% -100%, calculates half-time. According to the 2,00 km of the contingency mileage, replace the replacement standard between 240,000 -36 million kilometers, according to the mileage of the household car, how to say it has been more than ten years. The other is the lithium iron phosphate ion battery (iron battery) represented by BYD.

This battery performance and the ternary lithium ion battery are just the opposite. It has a small density, which causes large, high quality, good heat, and Its security is also good than the ternary lithium ion battery. Its battery thermal attenuation is slower, about 2000 times to attenuate 20%, but due to its shorter, life and lithium-ion battery are actually almost the same.

As for why the battery is attenuated, I will come to simply analyze it. I have read several American studies' research reports. In simple, in the lithium-ion battery, there is a layer of exchange membrane, and the lithium ions are round-forth through this film to complete the charging discharge.

After multiple charging, a small portion of the lithium ion is lost, becoming "deposited lithium ions", which form an "electrically insulating housing" inside the battery, the thicker the outer shell, the worse the performance of the battery. In addition, in the discharge, there is also a portion of the lithium ion to be consumed to supplement the damage of the exchange membrane, at which time the number of lithium ion is reduced, the endless mileage will be reduced. At present, from hardware, it is impossible to complete this problem.

It can only be started from the electronics, how to calculate how to rise with various algorithms, reduce the attenuation, according to I know in this area Tesla most. Of course, it is very clear, my country ZF is to understand the characteristics of lithium-ion batteries, so that the quality of electric car batteries will reach 8 years / 150,000 kilometers, and only replace the replacement standard, then 4S shop is free to replace, this The country is still very intimate. Of course, there is law to protect consumer rights, we should pay more attention when we usually use, reducing battery loss on the source, I asked the relevant engineers, there are two things to pay attention to: 1, try not to step on the throttle every day ( The electric door), because when the moving gate is stepped on, the electrical control system will send a signal, so that a large number of lithium ions are gathered in the discharge end in a short period of time, and this convention will reduce part of the lithium ion activity, and speed up the losses of the exchange membrane, thereby new battery loss.

2, don't use the fast charge technology to charge, because the fast charge, the lithium ion is quickly concentrated on the charging end, passing through the exchange membrane to complete the task, long here, to speed up the appearance of the electrically insulated shell. In fact, it is said that the attenuation of electric vehicles is not terrible, and the replacement fee will also be less and lower with the development of battery technology, and then, a car is not more than ten years, most people will open for six seven years. If you change it, there is no problem with the second-hand car, after all, it only consumes 20%, and the driving force is 20% after 10 years!.