simey_binker
100 µW
- Joined
- Sep 3, 2013
- Messages
- 9
Hello all,
Does anyone make a small PCB to balance the cells in a common hobby battery (perhaps check temperature as well?) that would be installed permanently next to the battery? Right now all that logic is within the charger, but I would like it with the battery.
This makes the interface to charge the battery much more simple: just apply your high current DC +/- voltage to a plug, and the internal BMS would manage the balance within the battery. I just want to eliminate the nuisance of that balance cable also needing to be hooked up whenever I charge.
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Ultimately... this is for a OneWheel Plus battery swap. My OneWheel BMS was fried when some water got into the case, and OneWheel won't sell me just the BMS replacement. The OW Plus uses LiFePO4, which isn't particularly energy dense, so I was thinking of moving over to Li-ion (like the OW XR uses) for doublish the range. I'd be looking at 14S or 15S (2 x 7S or 3x 5S), so you can understand that hooking up a 14 or 15 leads to balance the cells every time you needed to charge would become obnoxious.
Thankfully the OW Plus doesn't have any smarts from the controller requiring the stock BMS to communicate. You can just apply voltage to the controller, and off you go.
Does anyone make a small PCB to balance the cells in a common hobby battery (perhaps check temperature as well?) that would be installed permanently next to the battery? Right now all that logic is within the charger, but I would like it with the battery.
This makes the interface to charge the battery much more simple: just apply your high current DC +/- voltage to a plug, and the internal BMS would manage the balance within the battery. I just want to eliminate the nuisance of that balance cable also needing to be hooked up whenever I charge.
--
Ultimately... this is for a OneWheel Plus battery swap. My OneWheel BMS was fried when some water got into the case, and OneWheel won't sell me just the BMS replacement. The OW Plus uses LiFePO4, which isn't particularly energy dense, so I was thinking of moving over to Li-ion (like the OW XR uses) for doublish the range. I'd be looking at 14S or 15S (2 x 7S or 3x 5S), so you can understand that hooking up a 14 or 15 leads to balance the cells every time you needed to charge would become obnoxious.
Thankfully the OW Plus doesn't have any smarts from the controller requiring the stock BMS to communicate. You can just apply voltage to the controller, and off you go.