Hello again everyone! It's been a while since I've posted. My Cyclone 3kw ebike project is still a project at the moment. I'm going to be ready to order a BMS and assemble my battery in the next few weeks. Balancing my funds has been tricky but at least this way I'll get to enjoy and test it all spring and summer.
I'm currently communicating with BesTech for a BMS. They recommended one that isn't listed on their site for my needs and sent a document for review.
Protecting my cells and their capacity is my number one priority right now, and this looks pretty good. The doc looks a little different than the others on their site and I got a confusing answer when I asked how this model was "adjustable" since the whole column seems to be adjustable. When I asked the rep replied with "Adjustable means we have several matching parameters for you to make choice. All parameters are ready programming in factory and ready to use, also our MOQ is 2." so I dont quite understand if I can, or cannot order one with some custom values if I wanted or needed to.
I want to limit my cells to 4.05v-3.0v to keep them healthy for a long time, but I also would like the ability to charge them to 4.2v when I want to go a little further, and down to 2.7v as a "limp home" mode and I would limit my current as well. Are there any controllers that would let me do this? I was looking at the Kelly KBS72121, but I have heard they aren't great controllers.
I have also made contact with two companies that will sell me poron, specifically I settled on 4701-41-15188-04 (AquaPro, 1/8", black)
One is on Alibaba and I haven't gotten a quote for shipping yet. I asked for a square meter with, and another without adhesive to make sure I have plenty of extra just in case or for future projects. And the price was $170 for those two meters.
The other company I contacted, Stockwell, has the same variety of poron. However they have a $150 minimum for your order. With the pricing they gave me, and if my math is correct, I can get two sheets of 5.5'*4.25' (or about 1.68m*1.30m) of poron with and without adhesive for $150. I'm probably going to order through them.
Last update note, I had a fairly complexish design for my battery housing. I was hoping to have Tapplastics cut and assemble it for me, but they said it would cost $700. Now I'm planning to either buy the sheet of ABS and heat it to bend it around a sheetmetal template. Or I might 3D print the housing when I get my Prusa MK3 delivered and assembled.