yes. Where would I look for cell packs that would fit in this case? I could install them myself.Did you read my post above?
yes. Where would I look for cell packs that would fit in this case? I could install them myself.Did you read my post above?
Is the BMS working OK ?Where would I look for cell packs that would fit in this case? I could install them myself.
Loads on Aliexpress and a few on Ebay. first you need to measure the space inside the case or measure the previous cell-pack.yes. Where would I look for cell packs that would fit in this case? I could install them myself.
Hi, please let me know how old the bike is and where the battery is situated on the bike?I’ll get started on this tomorrow. How do I open the case without breaking anything?
Hi DavidHi, please let me know how old the bike is and where the battery is situated on the bike?
All the best, David
It sounds like this could actually be dangerous?The battery shouldn't work at all if #4 is 0v as this cell bank is dead , the BMS should be sensing a fault and refusing to switch to allowing a charge. Also #1 & #3 are quite low so should trigger lvc much sooner.
I for one would be very cautious of this pack and certainly wouldn't continue charging.
Repeat the first four voltage checks incase there was an error in testing .
What ever occurs now don't persist with this cell pack , take it to your local recyling centre for just that recyling .
I actually left it charging , so you got me a bit worried. What could happen?It sounds like this could actually be dangerous?
Should I be worried?
Don't panic just yet. Do the tests that Neal suggested. Something doesn't quite add up with the measurements you made, so repeat them first before you decide what to do. Nothing has changed from before, and it didn't blow up the previous times you charged it, but do it in the garden rather than your kitchen, just in case.Scary stuff. And now I'm without a bike which I'm very dependent on (I live on an island with no cars, and need to haul everything for 2km on the bike to the house from the ferry).
I do however have a 54V sharkfin battery. If the cells fit in the Wisper case, maybe I could replace the pack? Or would 54V kill the controller on the Wisper?
What??? Putting a 48v battery and controller would be a good solution for any 36v Wisper bike. If I had any 36v bike that had a failing battery, I'd always upgrade to 48v, except in some fringe situations.Don't use the 48v battery on a 36v kit, it will cause even more trouble than your present problem. You only need a modest but new 36v battery.
It wwould probably damage the controller, but controllers are cheap and you can use the opportunity to get a better one.Scary stuff. And now I'm without a bike which I'm very dependent on (I live on an island with no cars, and need to haul everything for 2km on the bike to the house from the ferry).
I do however have a 54V sharkfin battery. If the cells fit in the Wisper case, maybe I could replace the pack? Or would 54V kill the controller on the Wisper?
His commute is modest, he does not need a big battery. Even a tool battery may work for him. If it were me, I would hook up a 10ah or 15ah saddle bag battery and sort out his problem in 5 minutes. A bag battery would usually fit inside behind seat post battery cases.What??? Putting a 48v battery and controller would be a good solution for any 36v Wisper bike. If I had any 36v bike that had a failing battery, I'd always upgrade to 48v, except in some fringe situations.
David, could you tell us if the controller on this bike would handle a 48v battery?Hi, please let me know how old the bike is and where the battery is situated on the bike?
All the best, David