Indubitably
100 W
- Joined
- Jan 9, 2010
- Messages
- 126
Anyone know of a BMS that would be suitable for use in a vehicle starter battery?
They want about $170 for a 4ah motorcycle battery and I just can't bring myself to shell out that kind of cash for a battery with so little capacity. I was thinking maybe 4 15ah headway cells in series would do the trick, or maybe 4 of the high discharge 8ah headways. I'm not opposed to the idea of lipo, but the BMS would have to be rock solid, as this thing will be mounted directly under my ass. Which brings me back to my main point, I need a bms that can handle being driven by an alternator.
I doubt my alternator will put out more than 30 amps max, but it would probably fluctuate pretty significantly depending on engine speed and draw from the lighting system. I'd need to sustain about 150 to 200 "cold cranking" amps for maybe 5 or 10 seconds when starting but my current draw probably won't be any more than 20ah constant. I don't need my capacity to be higher than about 6ah, but it certainly wouldn't hurt to be closer to 10.
What do you guys think, am I on the right track? Any suggestions?
They want about $170 for a 4ah motorcycle battery and I just can't bring myself to shell out that kind of cash for a battery with so little capacity. I was thinking maybe 4 15ah headway cells in series would do the trick, or maybe 4 of the high discharge 8ah headways. I'm not opposed to the idea of lipo, but the BMS would have to be rock solid, as this thing will be mounted directly under my ass. Which brings me back to my main point, I need a bms that can handle being driven by an alternator.
I doubt my alternator will put out more than 30 amps max, but it would probably fluctuate pretty significantly depending on engine speed and draw from the lighting system. I'd need to sustain about 150 to 200 "cold cranking" amps for maybe 5 or 10 seconds when starting but my current draw probably won't be any more than 20ah constant. I don't need my capacity to be higher than about 6ah, but it certainly wouldn't hurt to be closer to 10.
What do you guys think, am I on the right track? Any suggestions?