Does frequent DC quick charging shorten an EV battery’s life?


Too-frequent DC quick charging can theoretically harm an EV’s battery, inflicting it to lose capability, and thus driving vary, quicker than would in any other case be the case. Nevertheless, there’s little arduous knowledge on the long-term results of frequent quick charging.

Now battery knowledge specialist Recurrent has made a considerable contribution to the literature on the topic. Recurrent studied quick charging on over 12,500 Tesla autos within the US to be taught if the software program and security mechanisms within the battery administration system (BMS) forestall harm to the battery.

Recurrent in contrast vehicles whose homeowners use quick charging nearly completely to vehicles whose homeowners very not often quick cost. The outcomes of the research present no statistically important distinction in vary degradation between Teslas that had been quick charged greater than 90% of the time and people who had been quick charged lower than 10% of the time.

Preliminary evaluation by the Recurrent group means that the research findings will be utilized throughout Tesla fashions and different EV producers, though the corporate continues to be conducting detailed analysis on different standard EV fashions. EV makers have invested in sturdy thermal, voltage and battery administration programs with a purpose to shield their batteries from harm with routine quick charger use, and Recurrent’s research outcomes point out that these programs are efficient.

The quick reply to the query on each EV proprietor’s thoughts, in keeping with Recurrent: “Occasional quick charging is okay.”

‍Quick charging can have an effect on EV battery life, nonetheless. Recurrent cautions in opposition to quick charging in excessive warmth or excessive chilly with out battery preconditioning. Preconditioning refers to a function of an EV’s thermal administration system that pre-cools the battery so it could possibly settle for a better cost price with out overheating. Usually, if a driver makes use of the automotive’s navigation system to find a quick charging station, the battery might be preconditioned by the point it arrives.

One also needs to keep away from quick charging an EV at very low or very excessive states of cost, as battery resistance might be increased.

EV drivers who insist on quick charging their vehicles to 100% are the scourge of busy charging hubs. In actual fact, as Recurrent explains, most EVs have software program that may curtail quick charging speeds above an 80% state of cost with a purpose to keep away from stressing the battery, so hanging round to get that final 20% is pointless.

Recurrent additionally factors out that the said charging pace in kW of a selected quick charger doesn’t inform you precisely how briskly the automotive can cost. Actual-world charging pace relies on many elements, together with software program and battery limitations, temperature, state of cost, and battery age. (That’s why Charged seldom repeats automakers’ claims about charging pace.)

Supply: Recurrent


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