DasDouble said:
I think you have unerstood my question incorrect. I wantet know if the weight of twize the amount of a battery (which could result in twize the amount of ah / capacity) impacts in the total range of a bike / how much it impacts the total range of a bike because of the added weight.
Hopefully you read my answer to you, because it gives you as much of an answer as there is, without what would probably be some complex math. I'm not the best person to give math answers, just practical experience.
But the basic answer is still: it depends on the proportion of battery weight to the rest of the vehicle/rider/cargo, *and* the number of stops/starts and/or hills (including their slope and length).
All of those will determine how much range difference there will be with a change in battery weight/capacity.
It is still more complex than that, though:
One other thing that will make some difference is also the original capability of the battery to deliver current without sagging in voltage, *and* how much difference doubling the capacity of the battery would make to that.
One example: If there is a lot of sag under load, and there's a lot of load time during a ride, you'll get less capacity out of the pack than you'd expect based on simple capacity ratings. Plus as it gets lower in capacity, the BMS (if any) will start cutting out because of LVC as the voltage sags, even though there's still "plenty" of juice left in the cells (if they were being used at a lesser load).
But adding a second identical pack would probably decrease that sag by a lot, possibly to less than half the amount it had been, simply because there is less load on all the cells now. This would then add more range to the vehicle, but how much more depends on the battery itself (cell type, BMS LVC, etc), as well as all the other things I listed before.
There's probably other factors I dont' recall ATM.
