That few cells even with 30Qs isn't going to get you very far. I'm pretty sure you can fit more cells in your battery bay. Try to max out the space you have.E-ScooterDude wrote:Here's my battery plan. I designed this paper so that when you fold it, it accurately represents the cell orientation.
Excellent! I was thinking you were building a single pack and calling it good. Yeah 3 is much better. You should consider making a single pack that contains 3X the cells if possible. I need to do a simulation myself. I have loads of 18650s...enough to fill my battery bay 2 times easily. I want to fill the battery bay with cells and then see how many I get in there and then figure out how to weld them into a single pack. I think I can get 5 or 7P despite my battery bay being partly filled already. I tend to build many smaller packs and then balance them like they are a single large pack. It works, but it adds lots of external balance cables as a result.E-ScooterDude wrote:Thanks again EG.
According to my math I can fit up to 4 of these packs in the bay for a total of 24Ah, depending on where I put the controller. I will be able to get at least 3 in there no matter what. That's why I am looking at an "outrigger" pack just in case. In the end, I may go with something like what you are using just to get the range I'm looking for, or if I extend my current requirements.
Also, thank you very much for the battery source tip. I was looking around for a good source for these things. The prices are all over the place on these depending on where you get them, and I definitely don't want fakes or knock-offs.
From axel to axel it's 37" long. From the factory it weighed about 45 pounds. I'm obviously adding weight to it with the much larger battery box and of course the LIPO pack weighs much less than the 3 SLAs it used to run on so I'm still pretty close to the factory weight so far.E-ScooterDude wrote:Those chargers are amazing. I can tell a lot of work went into them to give you what you were looking for. Thanks for sharing those ideas.
I did check out the Currie scooter thread, and I agree that it should be a rocket with that little weight and that much power. The 1000 I had was just a bit smaller than my current one, but the one you have seems way smaller. I got a kick out of the extended battery box.
1. When I was running at 48 volts, I would draw a max of about 80 amps. Now that I'm running at 82 volts the most I ever draw is 60 amps and normally on level ground going full out I pull 40 amps. I also have phase current limiting set to 75% since more phase current doesn't make the motor pull harder, just gets hotter. The only way I can get more out of the motor is with more voltage.E-ScooterDude wrote:EG: I will report whether these tires wear well and how they do under adverse conditions (limited off-road). I use Michelin's on my E-Bike and they are fantastic so I was naturally interested in them. Also, they were the exact size I was looking for.
Two more questions for you EG:
1. With your current power setup, what would you say is the MAX Amps you pull, even for a short max power run? Also, what would you say is your continuous Amp draw?
2. When you order from a Chinese merchant (through Alibaba, AliExpress, etc) do you get overseas or air freight shipping?
It's crazy how simple stuff like communicating clearly makes a huge diffrence. Sometimes you have to ask the same question multiple times to get a straight answer. I'm not afraid to ask over and over until I find out what I want to know. It's irritating at times and can feel like they are hiding something, but most of the time it's just misunderstanding.E-ScooterDude wrote:Thanks EG.
This whole buying from China thing is coming together, and there does seem to be a technique to it.