galderdi Regular Member Joined: 12/08/2016 Location: AustraliaPosts: 99
Posted: 03:16am 20 Sep 2021
Cool, thanks for clarifying. I haven't narrowed my options just yet. I am still tentatively aiming for Mar 2023 on the road so I don't want to purchase the batteries too soon and have them sitting on the shelf all that time.
One option I am considering are 45 x LiFePo4 3.2V 100Ah. Giving about 14kwh. Based on early measurements they will fit. I do need to redo those measurements as I now have the motor and gearbox in place. They will be about the 100kg I require. The plus side is LiFePo4 are resistant to fire. They to do burn, but not in the same explosive way as many other chemistries. But the down side is they are only rated for 300amp bursts. I can probably go a shade higher because it would only be a second but I will still be struggling to support the 1000amps I spoke about earlier. Having said that I have driven my previous EV set to 500amps output and it was ok but not all that inspiring. By my calculations I would expect 300amps input to support about 573amps output and limit the power to about 51Kw. Not ideal. So I am hoping I can find a better option in the next 12 months.
I think if I can find a combination that would support 400amps in I could squeeze about 750amps out. That would be a good compromise.