Search found 1012 matches

by cell_man
Jun 04 2017 2:34pm
Forum: E-Bike General Discussion
Topic: 52V Battery wont charge past 80%
Replies: 6
Views: 695

Re: 52V Battery wont charge past 80%

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...
by cell_man
Jun 04 2017 1:43am
Forum: E-Bike General Discussion
Topic: BBSHD, Help with 08H code
Replies: 13
Views: 1751

Re: BBSHD, Help with 08H code

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...
by cell_man
Jun 04 2017 1:27am
Forum: E-Bike General Discussion
Topic: BBSHD, Help with 08H code
Replies: 13
Views: 1751

Re: BBSHD, Help with 08H code

tomjasz wrote:
fechter wrote:I guess somebody should set up a BBSHD repair service. :idea:
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.
by cell_man
May 19 2017 5:50am
Forum: Battery Technology
Topic: New Samsung cell 33G
Replies: 34
Views: 6463

Re: New Samsung cell 33G

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...
by cell_man
May 01 2017 7:56am
Forum: Battery Technology
Topic: Samsung 21700, 3Ah , 30A discharge.
Replies: 26
Views: 2735

Re: Samsung 21700, 3Ah , 30A discharge.

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...
by cell_man
May 01 2017 6:23am
Forum: Battery Technology
Topic: Samsung 21700, 3Ah , 30A discharge.
Replies: 26
Views: 2735

Re: Samsung 21700, 3Ah , 30A discharge.

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 ...
by cell_man
May 01 2017 6:12am
Forum: Battery Technology
Topic: Samsung 21700, 3Ah , 30A discharge.
Replies: 26
Views: 2735

Re: Samsung 21700, 3Ah , 30A discharge.

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... EVer heard the expression "Bett...
by cell_man
Apr 30 2017 9:50pm
Forum: Battery Technology
Topic: AllCell Battery Fire
Replies: 40
Views: 4638

Re: AllCell Battery Fire

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...
by cell_man
Apr 30 2017 11:50am
Forum: General Discussion
Topic: Dogman Dans E bike burns his house.
Replies: 172
Views: 21575

Re: Dogman Dans E bike burns his house.

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...
by cell_man
Apr 30 2017 8:31am
Forum: Battery Technology
Topic: AllCell Battery Fire
Replies: 40
Views: 4638

Re: AllCell Battery Fire

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...
by cell_man
Apr 30 2017 8:02am
Forum: Battery Technology
Topic: Samsung 21700, 3Ah , 30A discharge.
Replies: 26
Views: 2735

Re: Samsung 21700, 3Ah , 30A discharge.

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...
by cell_man
Apr 30 2017 6:52am
Forum: Battery Technology
Topic: Samsung 21700, 3Ah , 30A discharge.
Replies: 26
Views: 2735

Re: Samsung 21700, 3Ah , 30A discharge.

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
by cell_man
Apr 30 2017 5:30am
Forum: Battery Technology
Topic: Samsung 21700, 3Ah , 30A discharge.
Replies: 26
Views: 2735

Re: Samsung 21700, 3Ah , 30A discharge.

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 developers...
by cell_man
Apr 30 2017 5:13am
Forum: Battery Technology
Topic: AllCell Battery Fire
Replies: 40
Views: 4638

Re: AllCell Battery Fire

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...
by cell_man
Apr 30 2017 3:37am
Forum: Battery Technology
Topic: Samsung 21700, 3Ah , 30A discharge.
Replies: 26
Views: 2735

Re: Samsung 21700, 3Ah , 30A discharge.

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...
by cell_man
Apr 30 2017 2:44am
Forum: Battery Technology
Topic: AllCell Battery Fire
Replies: 40
Views: 4638

Re: AllCell Battery Fire

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...
by cell_man
Oct 14 2016 5:34am
Forum: E-Bike General Discussion
Topic: Who has bought EM3EV's bicycle frames and how do you like it
Replies: 203
Views: 23315

Re: Who has bought EM3EV's bicycle frames and how do you lik

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.
by cell_man
Oct 14 2016 1:07am
Forum: General Discussion
Topic: Amberwolf gratitude thread
Replies: 51
Views: 4177

Re: Amberwolf gratitude thread

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...
by cell_man
Oct 12 2016 9:48am
Forum: Battery Technology
Topic: New 26Ah NMC Cell from a123
Replies: 22
Views: 3632

Re: New 26Ah NMC Cell from a123

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?
by cell_man
Oct 12 2016 7:11am
Forum: E-Bike General Discussion
Topic: Who has bought EM3EV's bicycle frames and how do you like it
Replies: 203
Views: 23315

Re: Who has bought EM3EV's bicycle frames and how do you lik

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. They are pr...
by cell_man
Oct 12 2016 7:02am
Forum: General Discussion
Topic: Samsung Note 7 fires
Replies: 30
Views: 2091

Re: Samsung Note 7 fires

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...
by cell_man
Oct 12 2016 5:02am
Forum: E-Bike General Discussion
Topic: Who has bought EM3EV's bicycle frames and how do you like it
Replies: 203
Views: 23315

Re: Who has bought EM3EV's bicycle frames and how do you lik

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.
by cell_man
Oct 12 2016 4:55am
Forum: Battery Technology
Topic: Tips on waterproofing my battery
Replies: 17
Views: 1623

Re: Tips on waterproofing my battery

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...
by cell_man
Oct 12 2016 12:23am
Forum: Battery Technology
Topic: Thoughts on split pack
Replies: 4
Views: 455

Re: Thoughts on split pack

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.
by cell_man
Oct 11 2016 5:59am
Forum: E-Bike Technical
Topic: Do the new MAC motors really have 0.27mm laminations?
Replies: 33
Views: 3703

Re: Do the new MAC motors really have 0.27mm laminations?

... 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...