Battery unused for 2 years is now completely dead

[musicbooks]

Hi folks
Long time no speak. The last two hellish years and accompanying life changing events led to me not using my brand new electric bike...at all. I kept an eye on my battery for a while then forgot about it. Now, returning to the road, I find my Bosch 500 Lithium Ion is completely dead with no lights showing. It's been on charge for 8 hrs but still no sign of life. Have I killed what was a very healthy and relatively unused battery?

 

[soundwave]

the batts have a small onboard bms that uses power from the batt so it can keep the can bus programming so not using it for 2 years means the cells have drained flat and bricked the bms.

a company in Germany can recell these packs but with postage and duty it is cheaper just to buy a new bosch batt.

or there is a 3rd party that makes them but never had no luck when i tried to buy one as no postage to the uk and costs more than a bosch batt.

E-Bike Vision - Product

Lässt Dein Fahrradakku nach? Informiere dich über die hochwertigen Ersatzakkus für Pedelecs und E-Bikes: E-Bike Vision Akkus.

www.e-bike-vision.de

 

[musicbooks]

the batts have a small onboard bms that uses power from the batt so it can keep the can bus programming so not using it for 2 years means the cells have drained flat and bricked the bms.

a company in Germany can recell these packs but with postage and duty it is cheaper just to buy a new bosch batt.

or there is a 3rd party that makes them but never had no luck when i tried to buy one as no postage to the uk and costs more than a bosch batt.

E-Bike Vision - Product

Lässt Dein Fahrradakku nach? Informiere dich über die hochwertigen Ersatzakkus für Pedelecs und E-Bikes: E-Bike Vision Akkus.

www.e-bike-vision.de

Thank you... That was my fear.. What about freezing the battery ... urban myth?

 

[soundwave]

it is the bms you might be able to salvage the cells but thats about it as bosch do not sell the bms and even if you got one from a working batt as soon as you cut power to it it bricks the bms as why no one will recell them.

 

[matthewslack]

Hi folks
Long time no speak. The last two hellish years and accompanying life changing events led to me not using my brand new electric bike...at all. I kept an eye on my battery for a while then forgot about it. Now, returning to the road, I find my Bosch 500 Lithium Ion is completely dead with no lights showing. It's been on charge for 8 hrs but still no sign of life. Have I killed what was a very healthy and relatively unused battery?

I bought a secondhand spare Shimano battery off ebay for half the new price, and it turned out to be good as new. There are a number of Bosch batteries listed right now, which may be a solution.

 

[musicbooks]

I spoke to my bike shop and there is a possibility Bosch might replace as a goodwill gesture due to lack of use and its management system turning perfectly good cells into a brick. But the shop will have to run it though a few tests first to confirm I qualify.

 

[Nealh]

I spoke to my bike shop and there is a possibility Bosch might replace as a goodwill gesture due to lack of use and its management system turning perfectly good cells into a brick. But the shop will have to run it though a few tests first to confirm I qualify.

That sounds partially promising.