steamknotty
1 µW
- Joined
- Oct 8, 2017
- Messages
- 3
I'm new here, excuse me if this is completely misguided.
I have an Evolve Bamboo GT electric skateboard. It's great, but the battery sucks. I have been using this thing for errands and fun, and I'm starting to really feel the restriction.
I don't want to touch the internal battery of this thing, though, because I might end up replacing it, and I want it to be resellable. Instead, I want to build a battery pack that effectively replicates the charger for this skateboard. This is the charger in the image: https://i.imgur.com/znJVxA4.jpg, it provides 42V and 4A to the skateboard.
What I was thinking is, I could build a 10s4p pack, which would provide, based on the cell type, something in the range of 44v to 36v. In front of this, I would attach a DC-to-DC step-up (like this one) to fix the output to 42V. I would then somehow fix the maximum output to 4A, assuming such a thing is possible. Then I would cut off the charging cable from a sacrifical spare Evolve charger and bolt it into the discharge cable, plug it into the skateboard charging slot, and essentially use the skateboard while it's also being charged by this thing. (I have done a prototype of this with a battery pack that can output 110V AC and the 42v4A charger, and the board seems to be able to handle being charged while being in use just fine.)
My expectation is that:
a) Skateboard doesn't blow up
b)This external battery charges the internal battery of the board to 100% normally, even if the external has 5% battery and the internal has 95% battery.
Is there a better pack for this than 10s4p? Do I really need the step-up?
I have an Evolve Bamboo GT electric skateboard. It's great, but the battery sucks. I have been using this thing for errands and fun, and I'm starting to really feel the restriction.
I don't want to touch the internal battery of this thing, though, because I might end up replacing it, and I want it to be resellable. Instead, I want to build a battery pack that effectively replicates the charger for this skateboard. This is the charger in the image: https://i.imgur.com/znJVxA4.jpg, it provides 42V and 4A to the skateboard.
What I was thinking is, I could build a 10s4p pack, which would provide, based on the cell type, something in the range of 44v to 36v. In front of this, I would attach a DC-to-DC step-up (like this one) to fix the output to 42V. I would then somehow fix the maximum output to 4A, assuming such a thing is possible. Then I would cut off the charging cable from a sacrifical spare Evolve charger and bolt it into the discharge cable, plug it into the skateboard charging slot, and essentially use the skateboard while it's also being charged by this thing. (I have done a prototype of this with a battery pack that can output 110V AC and the 42v4A charger, and the board seems to be able to handle being charged while being in use just fine.)
My expectation is that:
a) Skateboard doesn't blow up
b)This external battery charges the internal battery of the board to 100% normally, even if the external has 5% battery and the internal has 95% battery.
Is there a better pack for this than 10s4p? Do I really need the step-up?