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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.

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  • in reply to Sparkingchip

    for the cheapskates among us , a tea spoonful of Glaubers Salts -  sodium sulphate, would work as a pick up to lower the internal resistance a bit, though I see from your link that the tabs also have Epson salts - magnesium sulphate, as well.

    Probably joining the spare needles for the Gramophone on the shelf of "have not sold any for years" .

    Mike.

  • in reply to Sparkingchip

    Are you old enough to remember the con game of making petoil (gasoline) out of tap water by adding just a small pill?

    The UK con involved a car with two tanks - one empty where the water/pill mixture was put in and another with real gasoline to show that the car then worked.

    Peter Brooks

    Palm Bay 

  • in reply to mapj1

    It's my understanding that old used 78 rpm records can still be obtained in antique stores over here! 

    Peter Brooks

    Palm Bay 

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