Synergie Mistral- Battery issue mainly

[xdash]

Hi I got a issue with the battery on my ebike, Synergie Mistral.
After leaving it too long after the winter, I went to charge it, but will not take a charge.
Is there any way I can zap the battery a bit to get some life in so it will start charging.
The battery has not be that good since I bought 2nd hand of ebay, so might even need to get some advice recommendations for someone who could do this for me at a reasonable cost or guide or youtube vid that I could follow.

 

[KirstinS]

Don't do that please ! I think you are referring to technique of passing a very high voltage , sometimes a welder, for a moment across the battery to revive them?

That's for nicad batteries not lithium that you have. If nicads then can reinvigorate but lithium may set on fire/explode or at very least fry the battery management system circuit board if treated that way.

Nicad are not used these days really - it's old technology


I had exact same bike and took a non functioning battery apart to fix with help if forum
But when these type of phylion batteries let go it seems that's it

 

[xdash]

Hi KristinS I wasn't exactly sure what I needed to with battery to get it charging, don't worry I haven't got a welder, I was only thinking of something like putting 9v through it, have you link to where or as to how you fixed yours.

 

[xdash]

If I got a lipo charger and did each cell, would that work ?

 

[KirstinS]

Do you have a multi meter ? What does the pack read ?

If you open it up you'll find 10 x 3.7v 10ah rectangular cells


If any are reading 0 then it's game over - cannot revive them

You can use a lipo charger to bring each cell back to 4.2v as long

This is what I did - took hours . I was told not to bother by the experts on this site as these type of cells only appear to respond. You get them back to 4.2v each but as soon as a load is applied they fail again

I wish I could find the thread - it's in here somewhere

 

[flecc]

I wish I could find the thread - it's in here somewhere

I think this is the thread you wanted to find KirstinS:

Battery revival, how low is too low
.

 

[KirstinS]

That's the one - thanks flecc

 

[flecc]

And here's your other two threads on the same Synergie Mistral battery subject (Just showing off now! ):

Battery modular system

Recycling a BMS
.