simey_binker
100 µW
- Joined
- Sep 3, 2013
- Messages
- 9
Hello Everyone!
I've been battling this hypothetical build for a few days now, and I might as well pull in the hivemind to get everyone's opinions. This thread does spawn off my other thread about BMSs, but I'll start fresh to discuss the whole project.
I've got a OneWheel here, and I've gutted the battery enclosure. The inner dimensions are 215 x 150 x 30 mm (plus a little on the 150 side). And the motor controller can pull up to 30A at 14S.
If we start off with the standard 18650s, in the LG MJ1 or similar (3500mAh, 10A) I can fit the necessary 42 cells in the enclosure for a 14S 3P configuration (which gives me my 30A).
HOWEVER, this bloody BMS situation. Daly's standard 30A 14S BMS has the dimensions of 80 x 61 x 12 mm, and their "smart BMS" (which includes bluetooth) is a massive 128 x 66 x 18 mm. This is the same volume as an additional 7 cells!! Perhaps it has a bunch of features I'm not really looking to get into - but I'd prefer to have bluetooth so I can see all the cells.
Do you guys know of a reliable balancing BMS with bluetooth that is considerably smaller? How can I do this? You guys have good ideas? Make the enclosure bigger? Use different cells? Know of a good small BMS? Has everyone even had a good experience with Daly? Is it really necessary to have bluetooth connectivity? Or can I just install the standard one and trust it is doing its job? The OneWheel controller does have an app for SOC - so I will be ok in that regard.
I've been battling this hypothetical build for a few days now, and I might as well pull in the hivemind to get everyone's opinions. This thread does spawn off my other thread about BMSs, but I'll start fresh to discuss the whole project.
I've got a OneWheel here, and I've gutted the battery enclosure. The inner dimensions are 215 x 150 x 30 mm (plus a little on the 150 side). And the motor controller can pull up to 30A at 14S.
If we start off with the standard 18650s, in the LG MJ1 or similar (3500mAh, 10A) I can fit the necessary 42 cells in the enclosure for a 14S 3P configuration (which gives me my 30A).
HOWEVER, this bloody BMS situation. Daly's standard 30A 14S BMS has the dimensions of 80 x 61 x 12 mm, and their "smart BMS" (which includes bluetooth) is a massive 128 x 66 x 18 mm. This is the same volume as an additional 7 cells!! Perhaps it has a bunch of features I'm not really looking to get into - but I'd prefer to have bluetooth so I can see all the cells.
Do you guys know of a reliable balancing BMS with bluetooth that is considerably smaller? How can I do this? You guys have good ideas? Make the enclosure bigger? Use different cells? Know of a good small BMS? Has everyone even had a good experience with Daly? Is it really necessary to have bluetooth connectivity? Or can I just install the standard one and trust it is doing its job? The OneWheel controller does have an app for SOC - so I will be ok in that regard.