Is this SoH OK?

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NMC is still currently the chemistry of choice for long range & performance cars. It delivers. And inspite of early safety concerns caused by mostly faulty Hyundia batteries they have proved to be very safe. Often EV car fires have been caused by major accident damage or short circuits of wiring in the car, not the batteries. Although clearly a small number has been caused by the batteries themselves.

 

[MickeySw]

. let's hope those readings are wrong and not actual cell voltage, but rather charging voltage .... still

It’s my understanding that these are actual cell voltages as I read them out using an OBD dongle a few hours after changing completed.

I get the same result if I divide the total HV battery voltage as reported by the car with the number of cells installed..

 

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Ummm.... did you see this post?
Is this SoH OK? | MG ZS EV Forum ... let's hope those readings are wrong and not actual cell voltage, but rather charging voltage .... still

T1 Terry

Terry, 4.2v cell voltage is perfectly normal in our ZS EV's after a full charge to 100% it would appear. It is the voltage that's is at the full mark. The batteries are designed for that voltage. So the MG5 with NMC will be ok with that. Car scanner has shown that voltage on many cars I have tested with my OBD2 reader. I too wondered if that voltage was ok. It seems it is according to my guru. Remember, cell voltage measurements aren't always too precise either.

 

[MickeySw]

Remember, cell voltage measurements aren't always too precise either.

Operating a NMC cell outside it’s voltage range can lead to disastrous consequences, therefore one would think that measuring precise values is a must??

 

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Operating a NMC cell outside it’s voltage range can lead to disastrous consequences, therefore one would think that measuring precise values is a must??

Yes, wouldn't you. Agreed.