Gravity’s Child
1 µW
- Joined
- Mar 11, 2018
- Messages
- 2
Hello knowledgeable peers
I’d be very grateful for your assistance
I’m quite stuck with repair of an e-bike battery and have tried everything I can think of to get it sorted.
My first post on a forum so if it’s the wrong question or in the wrong place please feel free to delete and point me in the right direction.
The basics...
Battery is a 36v lithium battery with BMS, over temperature protection, balanced charge, 70A output and 10s charge plug/cables.
It’s powering a 250W fun8 front hub motor.
Bike usually has plenty of grunt on the climbs and is only about 15months old with quite limited use. No signs of the batter degrading over time...was working, then it wasn’t.
Checked paired cells separately and all looked quite well balanced, even and increased equally as I tested all 10 from 1 -10.
Bypassing the BMS, the bike throttle controller works flawlessly and powers the hub with no issues.
My thoughts are that the BMS has packed in.
I’d love to get a direct replacement (e-Bike is a WOOSH Bikes big bear) but can’t get electrical parts from seller as they don’t deal with that level of electrical spares.
I’ve tried looking on Google, Google images and Ali-express, etc. with no luck.
BMS is 45mm x 67mm, has a temp cutout, and apparently 70A limited output (which seems very high) Most of the e-bike BMS’s I seem to find online are 40/45A output. Maybe a smaller one will be fine and help reduce strain on the battery in future??
Space for replacement BMS is relatively tight at approx 85mm x 50mm.
The 10s plug and cables have very little ‘slack’ so really need to go into the top/narrow side of any BMS
Photos attached...
Really looking forward to hearing back from someone who might recognise the BMS or has a solution for this. My hopes were to fit heavy push m/f connectors to install the new BMS so that if ever happens again I can do a ‘road side’ repair without too much difficulty.
I’d be very grateful for your assistance
I’m quite stuck with repair of an e-bike battery and have tried everything I can think of to get it sorted.
My first post on a forum so if it’s the wrong question or in the wrong place please feel free to delete and point me in the right direction.
The basics...
Battery is a 36v lithium battery with BMS, over temperature protection, balanced charge, 70A output and 10s charge plug/cables.
It’s powering a 250W fun8 front hub motor.
Bike usually has plenty of grunt on the climbs and is only about 15months old with quite limited use. No signs of the batter degrading over time...was working, then it wasn’t.
Checked paired cells separately and all looked quite well balanced, even and increased equally as I tested all 10 from 1 -10.
Bypassing the BMS, the bike throttle controller works flawlessly and powers the hub with no issues.
My thoughts are that the BMS has packed in.
I’d love to get a direct replacement (e-Bike is a WOOSH Bikes big bear) but can’t get electrical parts from seller as they don’t deal with that level of electrical spares.
I’ve tried looking on Google, Google images and Ali-express, etc. with no luck.
BMS is 45mm x 67mm, has a temp cutout, and apparently 70A limited output (which seems very high) Most of the e-bike BMS’s I seem to find online are 40/45A output. Maybe a smaller one will be fine and help reduce strain on the battery in future??
Space for replacement BMS is relatively tight at approx 85mm x 50mm.
The 10s plug and cables have very little ‘slack’ so really need to go into the top/narrow side of any BMS
Photos attached...
Really looking forward to hearing back from someone who might recognise the BMS or has a solution for this. My hopes were to fit heavy push m/f connectors to install the new BMS so that if ever happens again I can do a ‘road side’ repair without too much difficulty.