Does older EV car get to full charge quicker

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Wed 29 Mar 2023 14:19
Does older EV car get to full charge quicker - Warning

I have read the EV car batteries degrade over time.

Does that mean it it also charge the car quicker, so does it need to be on charge for the same amount of time?

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Wed 29 Mar 2023 15:18
Does older EV car get to full charge quicker - Engineer Andy

I have read the EV car batteries degrade over time.

Does that mean it it also charge the car quicker, so does it need to be on charge for the same amount of time?

I suspect it'll take at least as long as on day one to get to the lower charged-up state. Before I changed them for new ones, my houshold rechargeable batteries still took the same time to charge as they always did, but the actual amount of use they provided steadily declined. By the time they (NiMh type) they reached 10yo, many were only giving 50% of the life before needing to be recharged again, some even less.

Newer battery tech means self discharge is lower and lifespans before they get to the above state is longer, but I can't see the time for charging to shorten, at best stay the same and more likely get a bit longer.

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Wed 29 Mar 2023 16:38
Does older EV car get to full charge quicker - sammy1

Have manufacturers done tests to prove that the current batteries will indeed last the 10 years that is bandied about? As the battery gets older does its range decline and therefore the cost to charge increases overall? At what stage do forum members envisage dealers changing batteries or is it already happening with faulty ones? You might think that with a battery lasting 10 years and an EV being perhaps more reliable overall that the depreciation of your EV would be a lot less than your ICE? Can you imagine the manufacturer making a reliable and long lived EV, they might go out of business!

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Wed 29 Mar 2023 17:07
Does older EV car get to full charge quicker - pd

If a battery loses capacity then it will take less charge period.

So if a 60kwh battery take 60kwh to fill when new and loses 10% capacity then it'll take 54kwh to fill it.

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Wed 29 Mar 2023 17:31
Does older EV car get to full charge quicker - Terry W

Charging a battery is not 100% efficient - in fact between 90-98%.

Put 10kw in and the battery may store 9.5kw - a loss of 5%. The energy is lost as heat - the battery gets warmer, cables heat up, the charger gets hotter.

As the battery degrades and its capacity falls it is not clear whether

  • because it holds less charge it should take less time to charge, or
  • the charging process becomes less efficient and creates more heat as other components degrade and corrode.
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Wed 29 Mar 2023 17:43
Does older EV car get to full charge quicker - Andrew-T

Have manufacturers done tests to prove that the current batteries will indeed last the 10 years that is bandied about?

I imagine it may be quite difficult to arrange an exact simulation of the 10-year life of a battery without waiting a few years at least. Accelerated charge-discharge cycles may not have the same effect. There is plenty of history on similar set-ups, but extrapolation to a different arrangement may show deviations.

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Wed 29 Mar 2023 18:47
Does older EV car get to full charge quicker - RT

Have manufacturers done tests to prove that the current batteries will indeed last the 10 years that is bandied about?

I imagine it may be quite difficult to arrange an exact simulation of the 10-year life of a battery without waiting a few years at least. Accelerated charge-discharge cycles may not have the same effect. There is plenty of history on similar set-ups, but extrapolation to a different arrangement may show deviations.

Battery degradation is very dependent on the pattern of charge cycles - slowest when the battery is recharged slowly from 20% to 80% - but some usage patterns don't allow that.

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