The first thing to be clear is that the service life of a new energy vehicle power battery is generally not measured by time, but by the number of cycles. Since it is a loop, there must be a different charge point and a charge point when charging is terminated. If it is a deep charge and discharge, that is, 0-100% of the cycle, then an experimental data will be obtained. In general, lithium iron phosphate batteries can be cycled around 2000 times, while current ternary lithium batteries can generally cycle about 1400 times.
Of course, the battery cycle life is also directly related to the battery operating temperature. The left diagram below represents the battery discharge capacity change of the Tesla battery at different temperatures. The figure on the right shows the change in the life of the deep discharge cycle battery at different temperatures. It can be clearly seen in the figure that the number of cycles of battery operation at 35 degrees is significantly higher than the number of cycles at 55 degrees.
At the same time, different discharge depths have a very large impact on the cycle life of the battery during different cycle charging. The figure below shows the effect of different depths of discharge on the battery life of the Tesla battery system. We can find that in the 0%-50% cycle mode, the battery life can be more than 3,000 times, and in the deep cycle, after less than 900 times, it will decay to less than 50%.
It should be noted here that national laws stipulate that when the battery capacity is attenuated to less than 80%, it is mandatory to recycle, and it is necessary to carry out the ladder reuse.
Of course, in the case of deep charge and discharge, the cruising range will be longer, but the attenuation of the battery will be faster. At the same time, the usual car habits have a great impact on the service life of the power battery.
1. Don't always do fast charging, you need to combine speed and slowness;
2. Do not always discharge the high-current power battery: avoid frequent acceleration and sudden braking;
3. When not in use for a long time, it is also necessary to charge periodically to avoid deep feeding;
4. Avoid charging and discharging in extremely cold weather;
5. Regularly do a power battery medical examination, basically one year can be done once, to the regular 4S shop for maintenance.
Avoid deep charge and discharge, usually pay attention to the maintenance of the power battery, it is best to use the charge, you can maximize the life of the power battery.
How long does the battery of a new energy vehicle generally last?
November 09 06:01:08, 2024
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