Skrevet av Emne: Charging speed and long term effect on battery pack  (Lest 513 ganger)

minibiti

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Charging speed and long term effect on battery pack
« på: onsdag 04. juli 2018, klokken 11:01 »
Hi,
It is a well known fact that the Ioniq charges fast at pretty much any temperature and up to a quite high SoC.
On the other hand, the new Leaf for example, charges quite slow in comparison.

I am wondering if, all things being equal (e.g lack of thermal management for the Leaf), the Ioniq is pushing the limits of chemistry in order to achieve its speed and that this will show in a poorer SoH in the longer run.

What to you guys think?

P.S: I took the Leaf and the Ioniq as examples, so the questions is basically this: are some manufacturers a bit less careful (or too optimistic) for some short term gains and long term losses?
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Electrix

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Sv: Charging speed and long term effect on battery pack
« Svar #1 på: torsdag 05. juli 2018, klokken 10:05 »
If they had the same battery then quickcharging at higher speed would wear down the battery faster.

If they were quickcharging at the same speed with different battery chemistry then the one witn chemnistry less suited for fast charging would wear down faster.


There is always a trade-off, and battery chemistry is chosen for different reasons. basically it is:

Higher charging speed = higher cost
Higher capacity = higher cost
Higher expected lifetime = higher cost
Higher temperature acceptance = higher cost
Active temperature management = higher cost

Whatever they chose it is always a balance between these to choose what they think will be most suitable. Ioniq batteries may degrade faster or slower than Leaf, depending on how much they are pushing that exact chemistry they chose.
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Sv: Charging speed and long term effect on battery pack
« Svar #2 på: søndag 08. juli 2018, klokken 22:00 »
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