Search found 1282 matches

by ebike11
Apr 06 2020 6:15am
Forum: Battery Technology
Topic: Charging port on generic packs?
Replies: 2
Views: 56

Re: Charging port on generic packs?

amberwolf wrote:
Apr 05 2020 10:38pm
sure. but the bms can't protect it from overcharging if you do.

it can only do that if you use the charge port.
Oh i see...thats good to know...wouldnt want any unexpected fires/explosions
by ebike11
Apr 05 2020 6:23am
Forum: Battery Technology
Topic: Charging port on generic packs?
Replies: 2
Views: 56

Charging port on generic packs?

Hi guys I bought a used 10s pack, pretty sure chinese cells, that I opened to check the type of cells in the first place. Didnt see any markings though. Anyway on the very small bms that it has, i can see the thin positive and negative charge wires soldered on the bms near the thicker main wires. Th...
by ebike11
Apr 04 2020 6:16am
Forum: Battery Technology
Topic: What would happen in this scenario?
Replies: 10
Views: 225

Re: What would happen in this scenario?

Just snip one shunt, or leave it intact and unsolder one end. Then you have a wimpy 25 amps controller to go with your wimpy 30 amps battery. If they say 30 amps, it will be happiest with 15 amps continuous anyway. Likely that's about 25 mph tops. Not exactly real fun, but just saying, if you want ...
by ebike11
Apr 03 2020 7:02am
Forum: Battery Technology
Topic: What would happen in this scenario?
Replies: 10
Views: 225

Re: What would happen in this scenario?

Isn't 60v pretty close to 18s? I would not worry a lot about the controller. The cells will tell you when you hit them with too much amps. If sag is only 4v, then the system is still only drawing amps the cells can handle. If it sags 10v, you are killing them. What I mean is that you only draw that...
by ebike11
Apr 03 2020 3:23am
Forum: Battery Technology
Topic: What would happen in this scenario?
Replies: 10
Views: 225

Re: What would happen in this scenario?

The 60V rating must be there for a reason, other components not 100V rated? If you end up pulling 50A you'll stress those too-weak cells, if you can't program the controller to limit current, consider using a CAv3 to do so, to protect the pack longevity. Hi..I didnt check the other componants but I...
by ebike11
Apr 03 2020 2:05am
Forum: Battery Technology
Topic: What would happen in this scenario?
Replies: 10
Views: 225

What would happen in this scenario?

Hi guys, What would happen if I had a controller rated at 60V 50A, but the continuous battery amps for the cells in my battery pack are rated at around 30A with NO BMS, just pouch cells assembled together, in this case 18s pack. At the moment, I am self monitoring the battery pack. The motor is also...
by ebike11
Mar 28 2020 11:35am
Forum: Battery Technology
Topic: Do you think the spec is accurate?
Replies: 2
Views: 109

Re: Do you think the spec is accurate?

I'd rather have 200$ worth of recycled EV cells. Cut and paste.. Build it myself. That is just me, though. If you trust the source... and ect..... A123 20Ah LifePo pouch ( for those that dont want to Klick on the link) 12pc., $339.11 USD. ~64 Wh ea. ..768 Wh total.... I can buy 2,225Wh for 350$ in ...
by ebike11
Mar 28 2020 8:43am
Forum: Battery Technology
Topic: Do you think the spec is accurate?
Replies: 2
Views: 109

Do you think the spec is accurate?

Found these in aliexpress...2 x 12cells for 100v would be 600 to 700ish dollars..but I read they put out 400A??

https://s.click.aliexpress.com/e/_dW0hlSA

It would be kinda hard to mount 24 of them but if they can do 400A and 20Ah.
Hard to know for sure though what they actually put out.
by ebike11
Mar 23 2020 4:28pm
Forum: E-Bike Technical
Topic: Mxus 3k vs Qs205
Replies: 27
Views: 1628

Re: Mxus 3k vs Qs205

I have a 4t myself, in a 16" motorcycle wheel. I am using 500 phase and 300 battery A and 20s lipos. I think at the 300 phase A that qs specify it is not that exiting, at 400 things start to happen. I can´t really say if the differens from 4-500 is the same as from 3-400, but with my 500 phase and ...
by ebike11
Mar 23 2020 3:44pm
Forum: Battery Technology
Topic: Adding an extension?
Replies: 6
Views: 175

Re: Adding an extension?

How many cells per group? Does the "extension" pack match? mAh size, each vs total? ESR and amps capacity? If not using a BMS, how are you balancing? Hi Yes all cells are identical..1x 18s pack and 1x 4 cell pack. I just temporarily connected to get 22s in order to see if I can get an increase in t...
by ebike11
Mar 23 2020 2:54am
Forum: Battery Technology
Topic: Adding an extension?
Replies: 6
Views: 175

Re: Adding an extension?

are you trying to put the 4s in parallel with the 18s? if so, you'll just start a fire. if you're trying to put the 4s in series with the 18s, they'll all discharge at the same rate, so if the 4s is lower capacity than the 18s, then when the 4s runs out you either stop or you destroy the 4s, you ca...
by ebike11
Mar 22 2020 11:00pm
Forum: Battery Technology
Topic: Adding an extension?
Replies: 6
Views: 175

Adding an extension?

Hi guys I have an 18s lipo pouch pack with 4 extra as spares. I recently connected the 4 cells to make a smaller pack to test on my bike and put it in my backpack while riding. I have to make a wire extension (10awg and xt90s) to the main pack in the rear rack. While riding and discharging, generall...
by ebike11
Mar 16 2020 8:01pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Another "stealth bomber" build.
Replies: 108
Views: 15007

Re: Another "stealth bomber" build.

Hi..great build! I have a qs205 motor as well in an EEB frame. Im not using a 24F but Im using the sabvoton 72200. I see what you mean about top speed. Im also not able to get past the 85-90kph mark...so Im always curious how other builds on youtube etc are getting over 100kph and sometimes on lowe...
by ebike11
Mar 15 2020 5:00pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Another "stealth bomber" build.
Replies: 108
Views: 15007

Re: Another "stealth bomber" build.

Thanks, it is always nice to see that people are reading and are interested in what they see. I try to make a build thread like I want other build threads to be. I don't think it is very interesting with treads that are like "I built a bike with parts x and y, this is what it looks like" I think yo...
by ebike11
Mar 15 2020 3:13pm
Forum: E-Bike General Discussion
Topic: Is this a common thing with Sabvoton?
Replies: 2
Views: 178

Re: Is this a common thing with Sabvoton?

After clicking save did you power cycle the controller via the ignition wire? I just read that if you don't, the settings won't save. I've no experience with those however, just passing it along. https://www.endless-sphere.com/forums/viewtopic.php?f=2&t=91855 I also saw this mentioned elsewhere, if...
by ebike11
Mar 15 2020 9:58am
Forum: E-Bike General Discussion
Topic: What could I do in the predicament?
Replies: 76
Views: 1933

Re: What could I do in the predicament?

john61ct wrote:
Mar 15 2020 9:43am
make your own custom to suit
Yes but those premade ones look simple and easy. If i put many bricks in the same back then i wouldnt need long wire connections in between bricks.
by ebike11
Mar 15 2020 9:04am
Forum: E-Bike General Discussion
Topic: What could I do in the predicament?
Replies: 76
Views: 1933

Re: What could I do in the predicament?

Are u guys also using something like this for connection? https://hobbyking.com/en_us/xt90-battery-harness-10awg-for-2-packs-in-parallel.html?queryID=679c2c028e9f22877e2c6be0eb7bc765&objectID=4028&indexName=hbk_live_magento_en_us_products https://hobbyking.com/en_us/xt90-battery-harness-10awg-for-2-...
by ebike11
Mar 15 2020 8:24am
Forum: E-Bike General Discussion
Topic: What could I do in the predicament?
Replies: 76
Views: 1933

Re: What could I do in the predicament?

Well everything is relative. He says that rating is not accurate, or rather oriented more toward continuous rather than short bursts. As always need to go by trusted user test results over vendor ratings. Does this seem enough for your use case? Mine are assembled 24s and could supply 500A if requi...
by ebike11
Mar 15 2020 7:44am
Forum: E-Bike General Discussion
Topic: What could I do in the predicament?
Replies: 76
Views: 1933

Re: What could I do in the predicament?

john61ct wrote:
Mar 14 2020 10:16am
Aha, you meant to buy higher C-rated packs!

Yes absolutely

I interpreted that you were recommending running at an actually higher C-rate

8-D
But his packs arent high C rate, correct?
Thr packs he is using the 15C 8000mah ones
by ebike11
Mar 15 2020 6:53am
Forum: E-Bike General Discussion
Topic: Is this a common thing with Sabvoton?
Replies: 2
Views: 178

Is this a common thing with Sabvoton?

Hi guys I have the 72200 controller and whenever I set the Battery amp, tap OK a bunch of times and tap SAVE a few times, its good for that ride only and when the bike is powered off then on again on a different day. the settings are back to the maximum 200A. Its a bit annoying if I want to set it a...
by ebike11
Mar 14 2020 10:03pm
Forum: E-Bike General Discussion
Topic: What could I do in the predicament?
Replies: 76
Views: 1933

Re: What could I do in the predicament?

Yep. Three series of four, each in a bag: front fork mounted bag, top tube bag, and down tube bag. The frame triangle is clear, but for a big shock. Modular batteries are letting you ride with 8,16, or 24 Ah easily. Useful when you don’t have the same commuting distance all the time, and you don’t ...
by ebike11
Mar 14 2020 7:16am
Forum: E-Bike General Discussion
Topic: What could I do in the predicament?
Replies: 76
Views: 1933

Re: What could I do in the predicament?

I use RC chargers only once or twice in all the life of my lipo batteries. I bulk charge with big Meanwell PSU’s, very fast. Good quality lipo can be expected to live 500 cycles, up to 800 sometimes, even when charged fast and supplying high power, if you avoid discharging low or letting them get h...
by ebike11
Mar 13 2020 12:04pm
Forum: E-Bike General Discussion
Topic: What could I do in the predicament?
Replies: 76
Views: 1933

Re: What could I do in the predicament?

But isnt the higher the Discharge "C" rate the better? Im confused how there can be a huge gap between 75C and 15C if they are both quite high of the quality list Well, tradeoff for weight for a little more power density.. AND.... ( more weight and more power in the Panther.. ) Plus C-rate depends ...
by ebike11
Mar 13 2020 7:29am
Forum: E-Bike General Discussion
Topic: What could I do in the predicament?
Replies: 76
Views: 1933

Re: What could I do in the predicament?

Ive flown the black ones.. I never flew the green ones. Black ones are punchy and last a few years by now. I have a 4000mAh. They got popular, so then they came out with the 75C ones ( that are alos rated good on the Lipo list ealier... ) Never flew them. They power stable but hit a cliff at about ...
by ebike11
Mar 13 2020 4:43am
Forum: E-Bike General Discussion
Topic: What could I do in the predicament?
Replies: 76
Views: 1933

Re: What could I do in the predicament?

I use RC chargers only once or twice in all the life of my lipo batteries. I bulk charge with big Meanwell PSU’s, very fast. Good quality lipo can be expected to live 500 cycles, up to 800 sometimes, even when charged fast and supplying high power, if you avoid discharging low or letting them get h...