Gremlin500
Member Since: 11 Mar 2022
Location: Newcastle, UK
Posts: 1771
 
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Quote:“ What I'm not sure is, does this mean a bad battery will show itself in the first few years of use, or does it mean how the battery is treated/charged during its first few years will determine its longevity?”
I would say both. As batteries age, they not only lose capacity, but they also start to exhibit significant voltage drop under load, (which recovers to some degree if current demand is reduced), this effect becomes greater as the amount of charge reduces, so the usable range gets much lower, especially if there are frequent high power demands. For applications such as ebikes where the size of the battery can be chosen, it makes sense to purchase the largest possible battery, to maximise useful range for as long as possible. Charge rate is really important: generally there is significant correlation between rate of charge and battery lifetime, meaning the slower you charge, the longer the battery will last.
Unfortunately, the requirement for motor vehicle batteries is usually to charge as fast as possible.
A propulsion battery charged slowly at home will probably fare much better than one only charged at rapid charge points, a point to bear in mind when buying used.
Motor manufacturers don’t give a hoot, as they aren’t having to pay for replacements.  V6 Vogue - “Less is More” - less to go wrong!
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1st Jul 2025 9:52pm |
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