If anyone has knowledge or experience they are willing to share (Especially about how that BMS is set up), I’d LOVE to hear it.Īnd if anyone wants to partner up on this project, it would be great to share the workload and do this in bulk. I’m still learning about battery packs, but it seems like making one with some Samsung 40T 21700 4000mAh 30A would be a pretty significant upgrade. I’ll attach an image to show which one was missing. Also, one of the MOSFETs was missing from the BMS. However that BMS is a 13s, and the PowerShift only has 12 cells. The cells they use are LG HE4 18650 2500mAh 20A.

I opened up one of the PowerShift battery packs I got with the board and found the following Other notable options include the OneWheel XR, Backfire G2T, and the Inboard M1. of the best electric skateboards include reliable braking systems. But while I’m decently knowledgeable about electronics and am good with a soldering iron, battery packs are a new area for me. The app allows you to customize your ride experience, track your speed and distance, and monitor your battery life. I’m pretty good at 3D modeling and printing, so the case shouldn’t be a problem. Question to the forum: For rheostatic braking…why a resistor? Would it be possible to dissipate electricity with a big huge spark from a huge capacitor, like a Taser? Also, wouldn’t that be bad-ass? The Max Max e-skate.I recently got an Inboard M1 and I’m hoping to build better battery packs to replace the PowerShift battery packs it normally uses. Mellow Drive is the only e-skate setup that I know of with this secondary braking ability. If the current or load is too high for the battery to take, the BMS will shunt it to a resistor, converting electricity to heat (and global warming!) and dissipating it. Rheostatic/dynamic braking would give you what you are looking for longhairedboy. Also, the first place where you really don’t want excess heat is the motor…the battery can at least be replaced more easily. Like psychotiller said, the current has to go somewhere. If 0 current is pulled from the motor, there is no braking.

The more kinetic energy being converted into current, the stronger the braking. (“DC injection braking” on the other hand, is the use of a separate power source to create a static magnetic field which slows the motor.)Ĭutting the current before the ESC would be bad. No current is used in regen (induction) braking just the opposite. I can only say we’re using the BMS to manage this extra power, and so far this is not sacrificing advertised distance or advertised top speed. Just a slight pull back on the joystick with the kill switch pulled in and you get a very steady. Without this feature they’re in for a dangerous surprise. Braking is actually one of the highlights of this board. For us addressing this was more of a safety issue than anything else… not as much for the few clients who live on top of a large hill, but those who don’t but may occasionally start on top of a large hill and expect the brakes to work on a fresh battery. Does this mean that the M1 will always be charged under capacity to leave room for braking regeneration current? Isn’t this sacrificing distance for those few clients who happen to live atop large hills? Top speed would be lower, since a lower charge would also mean less top voltage/power too? He said that if you can brake with a M1 “fresh off the charger” the board is converting the current to heat somewhere or putting back into the battery (electricity). Gongfu Xiongmao: My physics teacher is a hardcore e-skate builder. With the M1, you’ll still be able to engage the brakes with a battery that’s fresh off the charger.' Inboard: However, when the battery is full, the current has nowhere to go and braking is disabled to avoid damaging the battery. They didn’t really confirm that they will undercharge, but if they’re not force-feeding a full battery and have no secondary rheostatic or friction-based braking, there’s no other way for the BMS to instamagically make the regen current disappear, right? Hi all, I’m trying to cut through Inboard’s marketing-speak to figure out the physics involved.

Inboard m1 braking on full battery