Endless Sphere

Measure the voltage of the charger when it's not connected to the battery. Measure the voltage again, when the charger is connected to the battery. The voltage should be about 58.8V in the max setting when not connected to the battery. If the voltage drops to around 55V and stays there, when it's co...

First, I just want to say that I would not hesitate to buy anything from EM3EV again. They are a great vendor with fantastic customer service! However, I must warn you that the BBSHD may have some quality issues as per my own personal experience. I spent just over 2K for a kit and the motor went ou...

tomjasz wrote:

fechter wrote:I guess somebody should set up a BBSHD repair service.

California eBike does warranty repairs for EM3ev and repairs for the public.

That's quite right. Doug has been repairing the BBS motors for years and his repair service is very reasonably priced.

The question is whether this cell is really produced by Samsung or they just sold a crappy 35E recipe to China. Samsung has a good reputation for not exaggerating the specs, the 10C raises an eye brow here. The overenthusiastic list of specs seems to favor the initial speculation. Meanwhile, both E...

good idea Paul also with single cell fuses? of course :) your other battery packs are outstanding regarding safety! thank you for your kind words :) We're also hoping to have some further improvements in the coming months, by way of a rather smart BMS. It seems battery safety is in the forefront of...

Yes, i will wait for the 5Ah , 3C, version. :wink: There is talk of a 48G 21700 from Samsung. It's an EV grade/type cell, and I'm guessing it will be a bigger version of the 33G cell that is currently available (~3.15Ah, 18650, not a high power, 2C cont. 3C max, fairly high energy density but with ...

Saturday night there is it? Had a few? Hehe... "Saturday night there is it? Had a few?" HA! Funny guy... If you saw the thread on ES "The Ebiker Joke thread..." you might assume I like to kid around about "stuff"... like the sad state of urban transportation today... E...

Most BMS should have no problem handling some regen current when the battery is at a low state of charge. Most bms are a 3 wire type, that have a seperate charge and discharge cable. 2 wire type shares the charge and discharge on the same cable. 2 wire type requires more mosfets to handle the same c...

OMG, that's nuts. Very happy to hear that you've managed to make the best of a really bad and extremely tough situation, and that nobody got hurt. My heart goes out to you and your family. Hope the trauma of it all can pass soon and you can get back to normal as soon as possible. Things like this gi...

battery fire2.jpg Thanks for your responses everyone. Yes I'm a beginner and this is my first e bike. I had been trying unsuccessfully to build a battery for the last few months and was relieved when a friend sold me this unused brand name pack. I have not normally been running the pack down to LVC...

Well apparently, yeah these cells can genuinely deliver serious current without breaking a sweat. Whilst I'd say 30A per cell might be pushing it, but if they can do 15 or 20A without being stressed, that is already very impressive and is better than any 18650 cells that are readily available. I wil...

No, not MCG. Not really into blowing my own trumpet or grandiose ideas about myself.

Saturday night there is it? Had a few?

Anyway, thanks for the feedback and opinions, I'll certainly bear them in mind.

Have a good weekend
Paul

This cell is intended for power tools. Watt? Like electric bikes? Hehe... Master Cell Guy, ain't electrics (battery-electric bikes) ALL about the PEAKS (discharge AND recharges) at starts and "up" hills (against gravity), and accelerations? History stuffed with tech used for purposes the ...

Sure, not an invalid point and that is only 1 of several points made. I also stated that i don't know the specs of the battery and I'd be happy to be proven wrong (I've since had a look and it seems like their typical 36V packs are bigger than i thought, so my point is likely invalid). The battery m...

This cell is intended for power tools. Other samsung cells in this format will come with higher capacity, but lower discharge rates soon. I'm aware of this cell and can possibly get some, but my thoughts were that it wasn't great for most users, as the capacity is no more than a 30q, and the dischar...

What model of Allcell battery are you using, what is the capacity? Some observations: 1. I don't see a battery fire, as in, I don't see cells that have gone into thermal runaway and burnt. I see a burnt out BMS, maybe some burnt cables, not more. Happy to be proven wrong. 2. Your practice of running...

I don't know much about Leilli, because I don't deal with Leilli. I source the frames I supply from my Ukranian friends that actually developed and got the frame put into production.

Hey Amberwolf, You have always done a great job of moderating IMPO, kept everything impartial and in my very limited private communications with you, you were fair, reasonable, impartial and polite. I can imagine it must get very old, very quickly, having to deal with some of the stuff you have to d...

Does anyone know if these new A123 NMC cells have the same or similar packaging requirements (uniform pressure across the cell), as their LiFePO4 pouch cells?

cheers. that sounds acceptable. I would want to fit at least either a 18" with 3.00 or a 19" in 2.75, but the moped rims will be a little wider than the DH bicycle rims I guess The rims I'm talking about are 57mm inside width, which is somewhere between a fat bike rim and a wide DH rim. T...

Aussie traffic laws prohibit the use of, touching, and technically even looking at, a mobile phone whilst in control of a motor vehicle. Even using a mobile whilst sitting behind the wheel of a stationary car with the motor running is considered an offence. If you are pulled over for suspicion, the...

joe81 wrote:what is the biggest 19" tire/rim that can fit the tight swing arm?

My friend has my bike right now, so I can't take a picture of the fitment. I have 24" bike rim (57mm inside diameter) on my frame, with a 24*3" tyre and it is not a super tight fit to the swing arm.

Silicon is silly. It attracts or holds water. Use the mac daddy Rain Gutter goop. Answer number one. It is not cheap. Go to a roofing sampler. Must be 8- 15 usd a tube. I just want to clarify. Silicon to me as a Brit, means the stuff that is used to seal bathroom sinks, showers etc. It is generally...

The best way to build a split 14s pack, is by using 2pcs of 7s each with it's own BMS IMPO (2 wire type).

Using a single bms and linking the split packs, or paralleling 2pcs of 14s, are both liable to have some sort of issue. Not saying you can't do it, but I don't recommend it.

... The new version front has cable entrance on the side, rather than through the axle. That is a big plus. Now for a temperature sensor as well. I've personally been fitting a temp sensor in Mac motors for maybe 3 years. I'm sure Mac fit them for others too. I spoke with Mac today, regarding the 0...