Recent content by Jacob's Ladder

Well for the time being, I'm not planning on having regen braking, I don't have a controller that supports it yet. Also the cells I'm going to use are recycled cells that I'm testing and matching. I recognize this isn't ideal but a battery of the size I want is prohibitively expensive for me at...

You think it might be better for me to get something like this? https://www.aliexpress.com/item/14S-60A-active-bms-2017-new-Li-ion-smart-bms-pcm-with-android-Bluetooth-app-UART/32824233108.html I think I saw it mentioned in the Bluetooth BMS thread but that thing is over 500 replies in and it's...

Thanks for the help. Yeah, I think I'll look around for a different connector that can be panel mounted (so that it's flush) without the risks that using one of the XT line would bring. Changing the connector should've been my first instinct. On the diode for short circuit protection. I found a...

Maybe there should be a sticky thread for BMSes that the community has tried and their pros/cons? It's very difficult to parse the mountain of threads that may or may not have answers to questions on available BMSes.

I think I've settled on the idea of a single charge/discharge connection. It'd make it easier if I decided to connect an external battery pack to the main pack through the charge connector. I'm debating on how to properly protect the charge connector though. I was thinking of using an XT60 male...

I'm using standard 18650 cells, so LiPo chemistry. 4.2V max 3.7V typ I would assume ~3V min 14 cells in series My controller is rated for 24Amps so I would think a 30+ Amp BMS would work fine Space limitation is difficult to say exactly. But it should be less than 90mm wide and as short and...

I'm working on my ebike build right now and currently one of the last parts I need is a decent BMS. I don't know how fancy it needs to be as this is my first build and it's going to be a bit crusty (it's a cheap ebay conversion kit). Of course I want all the basics but I don't think I need...

Good point, I have all those things and I'll probably want to have a phone mount anyways, so I can just use it as a meter for that sort of stuff. Yeah, I think this guys is going to be a Gen 1 bike. I'll ride it until she gives up the ghost or until I get fed up with something about her and...

I know I've disappeared and left this thread dead but my project is still ongoing and I've been doing some thinking. I recognize unless I buy nice, I'm going to eventually end up buying twice, as said before but I think it's foolish for me to head into this too hardcore because as also pointed...

Very fair points and I understand that these cells are going end up larger and heavier. I'm hoping that them being free will offset the disadvantages at least in my pocketbook's mind. Also I'm hoping building a large 3d printed mount can make it easier hide the bulk and/or put the batteries in...

I'm getting all the cells for free, so blowing the budget on the batteries isn't much of an issue. I've already tested almost 400 cells and have found quite a few good ones. Also while I may want this as a commuter bike, I still like tinkering and building. If that means that I have to replace...

I'm planning on using some re-purposed 18650s, so I'll have to reconfigure them but I could hit those goals. The 3 Turn Leafbike, I'm a little more shaky on do you have a good link to its specs and info on other builds? I'm checking out probably the main Leafbike motor thread now but it's like...

I can understand that 40mph is probably outlandish, and I'm willing to temper that back. 30mph should still get me to work in time. However, I'd like to keep the 40mi range on the table. I really want the flexibility to travel around my work area without any worries about charging in between...

Desired Max Speed on Level Ground: 40mph Desired Max Range at 40mph: 40mi Rider Weight: ~170lbs Terrain: Probably mostly flat, anything that would let me measure this would be great Budget: As cheap as reasonable. I'm thinking under $1k for sure but I'd like shoot cheaper if I can. As to the...