Battery acting strange while fast charging

I think you need to wait until the temperature outside isn't -5 before you get concerned. Lithium hates cold. The vehicle will be using power to heat the pack, but at -5 it's going to be a challenge. Again - I wouldn't be concerned at -5 degrees. Wait until you get out of winter. There's no rush, your battery warranty is long....

LFP batteries Have no steep change in voltage, which is why the state of charge is estimated by the software based on the consumption. It is necessary to regularly charge the battery completely in order to recalibrate the system y

Wait i cant see is that 400kw charging ?? Or I don’t see the dot correctly? Preheat your battery pack before charging. Is your atto recent ? How many charge you did/ km ? At least from what you explain the controller for the charge seems to compensate maybe a part of the pack that might be damaged or not working properly. That can happen but this is rare this can be checked by the garage. No worries there shouldn’t be an immediate danger. Just do a quick check under the car if there a dent of any damage.

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Weekly charge to 100 percent, and every 3 to 6 months drop it to 10 percent and fully charge to 100 in one go. These are as per byd owners manual. I follow these on my cars and the service centre can check these parameters are followed and maintained in order to keep your battery optimum and well within the warranty limitations. If you think your battery might be faulty after the outside temperatures are getting better, then you should get them checked for diagnostics.

Ho letto anch'io questo passaggio del manuale BYD. Ma c'è anche scritto di non andare sotto il 15%. Ho una Dolphin Surf e neanche volendo riuscirei a fare come dicono. Nel senso che non carico la batteria il 50-60% giornalmente da portarla, poi, al 100% settimanalmente. Credo che abbiano fatto un copia/incolla con delle versioni ibride.

What do you mean by pre-conditioning. No such function exists other than getting in the car and driving it until the battery has warmed up. The car already has active temperature management which is why they previously noticed the charge going down when parked.

I had the same thing. Went away after 12v battery change(found another issue with it) and couple of subsequent top ups from 25-100 of fast and slow chargers . Now it’s back to normal