Search results

Thanks very much everyone. I'm sure you're right - that the cells are faulty. The considerable inrush current must load the weak cells such that one or more parallel groups exhibits a low voltage which is enough to trip the BMS, so the display can't power the trike up. Had it been my battery, I...

Update following some load tests: Following Sturmey's suggestion, I obtained this 8kW shower element to use as an electrical load. It's actually quite useful because it's two non-identical elements and can be configured in series, parallel, or you can use a single element. It came with...

36V at 22A is 790W. You can get that from a butchered 3kW convector heater. Just remember to use rivets rather than solder ;)

A friend knows a plumber and I will shortly have a shower heater element :) . Did you run it continuously and, if so, how did you stop it overheating? (V^2/R = 236W at 36V or 290W at 40V) Or was it just for a few seconds while you ran some tests, so it didn't overheat?

Thanks Sturmey - the shower element is a great idea! :)

Yes, it switched on reliably with that load. I'll see if I can repeat the test with a heavier load in case it misbehaves.

Well, like I said at the beginning, I tested it with a kettle full of water. I measured the kettle as 28 Ohms when cold. I thought that was a fairly significant load - I didn't leave the water long enough to boil but it did get too hot to touch (without the water the element would probably...

I think 30 miles is a reasonable assumption. Once switched on I have just propped the front wheel up and rigged the throttle, and had it run continuously for more than 12hours but admittedly with little load. The battery still had plenty of life left and recharged OK. I wouldn't want to ride...

Thanks Saneagle. Yes, you're right, the inrush only occurs when I connect the battery. However, the battery connector has only got two pins and they go directly into the control box down near the bottom bracket. There is no second battery or any provision for one. The LCD panel cannot get...

Hello all! I'm new to this forum and totally new to electric bikes so please bear with me. I'm a retired electronics engineer who's into cycling. I offered to help a friend with her Jorvick trike which she uses because she's unable to walk without support. I don't know the model or year but I...