BEANS wrote: ↑
Mon Jul 01, 2019 6:53 am
I also had the same idea. There’s a small aluminum trailer for sale that’s 170 lbs, plus the battery pack (approximately 450-500 lbs). So, call it 650-700 lbs total, the car is designed for that much weight in passengers and cargo alone. If you put the batteries in parallel, I don’t expect the batteries would have a situation where they would heat up more than what they were designed for.
Honestly, doesn't sound ideal... A 450-500lb battery pack is what the Spark already has, so you're talking about double the range. Except, a battery pack charging a battery pack is inefficient. So you'd get maybe 80% or less of the additional capacity which would be (82 rated mileage x 80% = 65.6) another 66 miles? When I think of additional range 66 miles is miniscule considering I can easily conquer 600-800 miles for a full day of driving an ICE vehicle (think road trip).
If you could wire them in parallel, could the software adjust as necessary? Would it adapt to the additional battery capacity?
The only vehicle this would make sense to me on is a Tesla long range model. They can go 300 miles on their main pack, and since the pack is already a large rectangle it's exactly the shape of a trailer floor and if you could get another 240 miles (80% of 300) that's approaching a full day's max travel.
This is where towing a generator just makes way more sense than trying to rig another battery.