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As we all already now that batteries main problem is that they tend to discharge too fast. There's never not enough energy. But technology electronics and maschines tend to develop and use more and more power semms like batteries are just a little bit behind but it makes all the difference.
Batteries need to be taken care of not to overcharge and undercharge. Nowadays 400V EV batteries consist of 96 cells connected serially. Each serial cell voltages are monitored that is the job of BMS
Takes care of battery “health”. EV battery has to last for 10 Years and to fulfill this expectation