ADVICE - Anyone repaired a 36v/20Ah Li-Ion BMS Battery /

[bilabonic]

Hi All

After a couple of years my trusty 36v/20Ah Li-Ion battery is dying, it only getting to 36v fully charged, i have tried other chargers and checked output and its over 42v.

It used to be 42v fully charged.

This is the battery - https://bmsbattery.com/70-36v-li-ion

Cheers

 

[Deleted member 4366]

You have to check the individual cell voltages at the BMS before going any further. That will tell you if there's a chance of repair.

Your link goes to all the BMSB 36v batteries,, so isn't very helful.

 

[bilabonic]

I had it about 2 years ago and was in blue heatshrink then so not sure if its this -https://bmsbattery.com/ebike-battery/445-36v-20ah-li-ion-shrink-tube-ebike-battery-pack-battery.html

or

https://bmsbattery.com/ebike-battery/672-high-c-rate-36v-20ah-li-ion-battery-heat-shrink-battery-pack-battery.html

This is the order history for it -

13/5/2013
36V 20Ah Li-Ion Shrink Tube EBike Battery Pack - AC Voltage : 200V~264V
$289.00

 

[KirstinS]

D8veh is yer man

But you'll need to cut open the shrunk wrap and get to the bms circuit board.

You'll also need a multimeter

If you do this and take a photo of the bms and post here web can advise of readings to take and how

Cheers

Edit- my local maplin had a really nice digital one at 9.99 down from 29.99

But not on the website - I checked

 

[bilabonic]

I'm an industrial Sparky mate so got a few Flukes.

 

[KirstinS]

I'm an industrial Sparky mate so got a few Flukes.

Lol Brilliant !

The one time I answer a post like this and it's a bloomin sparky asking the questions!

Usually it's people like me who need the basics

 

[Deleted member 4366]

You have to peel off the shrink tube to get to the multipin connector. You might even see swollen cells.

 

[awol]

Hi All

After a couple of years my trusty 36v/20Ah Li-Ion battery is dying, it only getting to 36v fully charged, i have tried other chargers and checked output and its over 42v.

It used to be 42v fully charged.

This is the battery - https://bmsbattery.com/70-36v-li-ion

Cheers

Could I ask, aprox how many charges has it had and how many miles you got with it?