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Electric Vehicle 12V Battery Failures

Roger B

What is the problem with the common automotive 12V lead acid battery, or is the problem poor software systems that won’t black start?

https://www.fleetnews.co.uk/news/electric-van-12-volt-battery-issues-persist-says-afp

“The fundamental problem here is that when an electric van is left unused for a couple of weeks, the 12-volt battery charges down and it becomes impossible to start or recharge the vehicle,” explained Paul Hollick, AFP chair.

“There is no choice but to return it to the franchise dealer and even then, it can often take weeks to resolve the problem.”

I am not aware of IC engine vehicles, even the most modern and complex suffering from these problems.

I know that ‘maintenance free’ lead acid batteries are prone to sudden failures rather than the graceful degradation of older style where cold morning starting would get more difficult but this appears to be to much standing load, possibly from the support systems for the main EV battery.

Parents

  • I'm surprised that they still use 12V batteries as you no longer need to run a starter motor.

    I suppose it would be useful to be able to have the hazard lights still work if traction battery was flat or failed.

       - Andy.

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  • I'm surprised that they still use 12V batteries as you no longer need to run a starter motor.

    I suppose it would be useful to be able to have the hazard lights still work if traction battery was flat or failed.

       - Andy.

Children
  • in reply to AJJewsbury

    Ok, I should have been more specific there!

    I'm surprised they still use backup batteries with a voltage of 12V. There are other options after all, anything up to 48V.

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