Endless Sphere

THe problems with motors in the trailer are (besides lack of time to experiment) one of the main reasons I have not yet added motors to any of my trailers, and instead just use massive motors in the cargo bike and trike, which are sufficient to pull several hundred pounds of dogs, dog food, or a pia...

In order for me to have the cutout switches, I have to install the levers that came with my hub motor. Nope. You can buy off the shelf solutions like: HWBS (hidden wire brake switch; not directly compatible with existing wiring on all controllers, might require opening the controller to add wires) ...

You could check with your local powerchair / medical supply places and see if they have old dead SLA you could rip the guts out of. UPS/server backup power units also use them, so places that service those may also have them. Local recyclers may have piles as well. You can fabricate shells in a numb...

To use the firmware, the thing that is important is the manufacturer of the controller and the MCU/etc they used. To find out if yours is compatible, look up Casainho's posts to find the threads about the new firmware.

I actually have the same problem but I am doing a gas generator (38cc 4-stroke motor). You can also split the output from each 36V battery into parrelel connectors and then hook one connection for the serial 72V and the other to the solar charger. Like this diagram. Confirm this though I am not the...

I have 2 36v packs that terminate into a Anderson plug that has 4 connector . I then have a matching 4 connector Anderson plug that series the two 36v packs to 72v that goes to the controller . I made a charge plug that plugs into the 36v packs that parallels the 2 packs to one . So when I what 72v...

I'm so tired right now that I'm probably either just being stupid or misunderstanding the drawing, but isn't that actually the *rotor* plate? It looks kinda like it has stacks of magnets with a spot for a set screw at the top (outer circumference)...but I can't be sure. The stator has all the windin...

No, because the CA is what's doing the limiting/etc. It's a microcomputer. It doesn't matter what controller it's used with--it works with all of them the same way. The dumber the controller, the better, so you don't have to mess with two sets of settings to get it working the way you want. (setting...

The simplest method to do this that is oopsproof is to use a keyed jumper plug (that only fits one way) that connects the batteries in series to the controller for riding. When it is removed, neither battery is connected to anything (including it's counterpart). Then the charger plug uses a connecto...

Prices?

I need help! I have a 36v1000w brushed motor scooter, and I want to upgrade the controller to a Brainpower 38a brushless controller. Can I do that? Since your existing motor is a different kind, the new controller won't run it. You'll need to replace the motor with a new brushless motor with the sa...

There' are posts about them, if it helps:
https://endless-sphere.com/forums/searc ... mit=Search

Not sure I get your point: in "parallel first, than series" config, you still need to connect the bms wires. No more, no less bms wires, than in the "series first, than parallel" config. If a pack is built with a bunch of Xs1p groups, with no built-in parallel interconnects, then you need a complet...

If the controller is the problem (something in it's hall sensor reading ability), and if it is a KT Kunteng Kun Teng controller, you may be able to use the open-source firmware that Casainho / Stancecoke et.al are creating. They also have some for the LCDs for those controller. Just look up Casainho...

It probably will (been done with a number of Stromer rear hubmotors by UUmotor here on ES and elsewhere), but without the Stromer controller you lose the torque sensing PAS, if taht's a feature you like (assuming this model has one like the others I've seen, mounted in a recess at the rear dropout).

I was wondering if anyone has made an e-bike powered with batteries from any of the battery powered tools (e.g. Greenworks, Ego, Ryobi, etc). There's probably dozens of tool pack (toolpack) builds on ES, going back to the old DeWalt A123 packs, to the earliest days of the forum (and probalby before...

If the hall sensors themselves operate correctly, when measuring with controller plugged into motor, then it's probably not a connection or hall problem. But it could be a phase problem, either connection between motor and controller, or failed FETs inside the controller. It could also be a mismatch...

CANbus is just a protocol. Commands/data/etc are all device specific. So unless you reverse engineer what the A2B BMS should be sending for each query by the controller, and then figure out how to program that into a new BMS, or build a microcontroller that interprets each way for each device so the...

As long as there are series connections from every cell in a group to the next series cell, then there's no need for anything but "token" parallel connections. That's probably the better way to do it. "series first, then parallel" is one way to say it. But many packs I've seen are built with only on...

They are new cells. New new, or new to you new? I ask because "new old stock" that has sat around a long time can have the same issues that cells in-use for some time do. If they sat around fully charged or fully discharged (or worse) all that time, too, then that also negatively affects their beha...

I've finally had enough time here and there to get the CAv3 setup with the 3.12b3 firmware (vs 3.1 I'd had before), and reset it to factory during the FW upgrade to clear some "invisible" bad settings that were causing me problems with power limiting when running the throttle thru the CA (so I could...

First: why, exactly and specifically, do you want to use CAN? Keep in mind that CAN is just a protocol. Every controller and device will use different actual data and commands, so you have to contact the controller manufacturer to get the CAN commands and format for the specific controller you are u...

If useful, some other NASA battery stuff posted here over the years: https://batteryworkshop.msfc.nasa.gov/presentations/Perf_Safe_Test_Panasonic_Li-Ion_NCR_18650_Cells_JRead.pdf https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20140013497.pdf https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.g...

Depends on the age and condition of the cell, but older cells often drop down like that.

Depends on what's wrong inside, but there's a serious flaw in your testing scheme: If you pass current thru a 0V cell, you are reverse-charging it, as if you had hooked it up backwards to the charger. This is a really bad idea, and depending on what's wrong with teh cell(s) and their chemistry, can ...