C rate of the canadian tire yardworks battery

[el_walto]

Does anyone know what the approx C rate of the Canadian tire yard-works battery is? I've tried searching the forums, but the pages are fairly cluttered. Just wondering if it can take 20amp steady draw or not.

 

[Anonymous]

.

 

[amberwolf]

But I personally consider that dangerous: BMS can trip in the middle of an intersection when you've throttled too fast, or on a steep hill, now you need to reboot the whole system, not a good thing, and these kinds of things tend to happen at the worst moments.

Exactly. I don't have a BMS on my SLAs, but I was using a 25A thermal breaker (biggest I had in a convenient size) on the battery pack positive output, just in case something goes wrong with the wiring on that experimental mess I call a bike.

I had had it pop a couple times during startup from a dead stop when I first started using the new batteries at 36V vs the old 24V, with the new gearing and the new controller (the old one never pulled that kind of current that fast, ever), but it didnt' happen when I learned not to gun the throttle to start out.

Then it happened in traffic while making a lefthand turn (fortunately with a green arrow for me, no cross-traffic!) and I decided I would rather put out a fire from a wiring short than get hit because I couldn't get out of the way fast enough.
http://electricle.blogspot.com/2009/09/pop-goes-weaselly-breaker.html

So do whatever you need to do to make sure you can pull high enough currents to ensure speed when you REALLY need it. Paralleling those packs would be a good idea.


(At some point I'll put a bigger breaker in there, or something, just in case of a dead short outside the battery pack, once I have something I can use for that besides several parallel breakers).