Endless Sphere

The Q128 will have the power cable coming out of the axle on that side, and half of the metal is ground away, to let the wire exit, so there's not a lot of threaded metal rod on that side to hold additional nuts/plates. Even if the axle was long enough for extra nuts, I think mounting a plate that s...

Maybe he flipped the second picture left-to-right. On my Silverfish pack, the terminals are like the top picture you showed with the "+ S -". In other words the positive terminal is nearest the drive chain.

I only have the one pack, but it only uses the two outer positions.

Can they be run in series? The risk with a series arrangement is you get the total pack voltage (84V) across one BMS if it happens to shut off, so its transistors need to be rated for that voltage. In this sketch, two batteries in series, with the BMS circuits represented by a switch. So I'm not goi...

I don't see what you see, Molfped. I see the two red wires on the XT connectors changing to green and then connecting to the last terminal (B+ ?) but I could be seeing what I expected to see, and you probably have a better eye. By the way, is that an XT90 for discharge and an XT60 for charge? I kill...

If the battery doesn't reset when you give it full throttle, it should be OK. Even if it does, you would pay more than $500 just for a new bike and motor. The big risk on these things is if it's stolen or if the battery wants to explode.

The connectivity shown in KevMCA's pictures make sense to me. Might be a problem with the copper strips screwed down to solder pads passing current. Could be oxidation on both surfaces. Did he pull the balance connector and measure the balance voltages at the connector, using pins? What happens if h...

A closer look and now it looks like a MOSFET overheated. Maybe there was a short circuit that you didn't notice.

One thing that seems different with my AKM motor. I measured the O.L.D. at 137 mm. I never had a fit problem with the BMSBattery motors fitting into a frame, but I've got an alloy one that is exactly 135 mm, and that won't go. I got it down to 135mm by taking 2mm off the spacer that sits inside the ...

Glad to hear you're getting life back together, DrkAngel.

By the way, I ran my 10S-4P EVE 10AH combo down to 34 volts. Recharged it and it took 9.4AH, so it will be a serviceable pack for my ebiking.

If the BMS turns the discharge mosfets off due to LVC, it should still leave the charge mosfets on to allow charging. The body diodes in the discharge mosfets still allow reverse current to flow through them back into the cells, even when they are off. So I don't know what your point is. If the BMS...

Looks like water got in there. You will need a 13S BMS with an on/off switch, with the same current rating as your battery. Probably 25A? And it needs to fit inside the case. Also, a balance BMS is better in my opinion, This might fit, but it's not a balance BMS and it's only 15A. https://www.aliexp...

The good thing about the various displays is that they use the same plug wiring,, at least for the battery/ground connections. Any display will power up with only battery and ground, if they are in the right pins. If they were not the right pins, 48V or 36V applied to the wrong would be popping the ...

A well known fault on these Hall effect throttles occurs when the ground lead breaks and you get full throttle. This can be replicated by putting a diode between the Power and signal lead. Sometimes I pick up a controller and don't know which of the three pin plugs is for PAS or throttle (or speed s...

A few systems, like BionX (bankrupt) will configure the battery with extra data wires whose main purpose is to tell the controller it''s a genuine Bionx battery. Sure, they can be useful for diagnostics too, but the main reason is to force the user to use the same brand of battery. Called proprietar...

Charger shines with a green light , so seems to have stopped charging , after anothe 2 hours of charging , power of switch voltage is 45 volt , power switch on on is 54.6 V :roll: Step back. Is this still true? Your power switch sounds like it's working. While this is OK, if the 45 volts is just re...

Clarpark, I take it back. Thinking about my MXUS motor, where I spent an hour trying to figure the gearing/magnet count from watching a hall sensor flash. The AKM's are 12.6:1 reduction ratio and you can get 201, 260 and 328 rpm. Amberwolf - that's a nice trick to run two controllers off one display..

With a dual controller, I believe the major advantage is no second display to clutter up the cockpit. Having one display to set a common PAS level on both motors seems a plus. Having a built-in shared throttle is also nice. Separate controllers means two displays and more wiring. While you can jumpe...

Ebikes not allowed on sidewalks in Illinois, but like others have noted, given a choice of riding on a four lane road where the speed limit is 45 mph or the sidewalk, , I'll take my chances on a ticket riding on the adjacent sidewalk. When we were down in Florida riding some of the inter-city bike p...

Karl Gesslein says "There are 2 kinds of BMS, ‘balancing’ (smart) BMS and ‘monitoring’ (stupid) BMS. " https://electricbike-blog.com/2015/02/15/nursing-an-out-of-balance-lithium-cell-back-to-health-without-dying-in-the-process/ Tom Jazewksi (he posts here sometimes) used to do some customer support ...

I think your battery must be badly unbalanced. You have a few cells just barely above the minimum voltage, and the rest are almost at full voltage. When you try to charge it, the charger stops as soon as the high cells reach full voltage and the low cells can't get recharged. When you run the bike, ...

The action of the LCD3 and confirmation from your voltmeter says the battery is not turning on. Your description suggests it charges the controller capacitors briefly, and when you turn on the controller. they discharge. I think you need to figure out why the battery isn't working. It's got a red on...

I find the the generic PAS orange sensors work fine with that controller. My only problem with it was that it's not very powerful at 13A. So I don't use it except as a motor tester.

Was this pressure contact battery (Vruzend) or spot welded?

Many displays will turn on if you just connect power/ground and press the start button. No controller needed.

How old is the battery? Is it a brand name ebike? How far did you ride on a full charge when it was new? How far do you go now?