Battery Life

[UrbanPuma]

With most people having to replace their batteries after 2 years, i was wondering whether anyone thinks its possible for ebike manufactures to develop rechargeable batteries for ebikes?

Why is it not possible to develop a battery that will last about 5 years?

 

[BMI]

With most people having to replace their batteries after 2 years, i was wondering whether anyone thinks its possible for ebike manufactures to develop rechargeable batteries for ebikes?

Why is it not possible to develop a battery that will last about 5 years?

...but long life batteries are available for e-bikes now. It is common for lithium batteries to have a life of well over 1000 cycles (compared to only 300 deep cycles typically for lead acid batteries). For instance the factory waranty on a BMI LiFePO4 battery is 3000 full charge cycles or 3 years (whichever comes first). If you use one cycle a day, 3000 cycles is quite some cycling!

 

[flecc]

As BMI says, LiFePO4 (lithium-iron-phosphate) batteries are aleady capable of at least 1000 charges, with the longer life potentials he mentions, but none of the main e-bike manufacturers have adopted them yet for various reasons, despite trying them at various times for well over two years now.

At least two of the e-bike manufacturers have found that production ones are not yet reliable enough after suffering many failures in testing. There's also the small problem that the cells are a bit larger and heavier for a given capacity than the Li-ion cells currently used, meaning either a smaller battery in existing cases or new larger battery cases.

These longer lived LiFePO4 batteries are available from some individual suppliers and some members have used Li Ping ones which have proved ok to date at up to one year old, but of course these have to be mounted in some way on the carrier or elsewhere and a case made for them.
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