alohart wrote: ↑
Fri Mar 20, 2020 11:40 pm
Joff wrote: ↑
Fri Mar 20, 2020 8:39 pm
I built the auxiliary 8ah 360v battery, wired it in with a fuse and a relay to connect and disconnect it.
Couldn't see your photo because of a page not found error (404).
Sounds like you made great progress! Are you concerned about your auxiliary battery pack cells overheating when the car requires significant power? Do you have a way to balance the charge levels of your auxiliary battery pack cells? I suspect that your photos show how you've mounted your auxiliary battery pack which could become a heavy projectile in a collision.
I was trying to use google photos as host, but only allows me to see it. At least I was correct in assuming I didn't know how to do it, ha ha!
I don't want to pay for photo hosting service, just to show some photos here. It there a free and easy way of posting pictures that anyone could recommend?
I'm using spim08hp cells they can handle 200 amps. I am using a 50 amp fuse. I haven't measured 30 amps flowing when pressing the accelerator. I think the resistance is high enough that it doesn't keep up, so it gets a higher voltage than the main, then equalizes over time. If I connected the aux battery before the main battery is turned on, I get a big spark, high amp momentary surge that can weld my 125amp relay closed. I need to power up the car before connecting the aux battery, then all is well. I have detected no warming of the battery at all.