Search found 215 matches

by powersupply
Nov 08 2016 4:01am
Forum: Battery Technology
Topic: Actual size of HXT 2mm and 3.5mm and EC2 Plugs?
Replies: 2
Views: 248

Re: Actual size of HXT 2mm and 3.5mm and EC2 Plugs?

Am I posting my question in the wrong thread?
I had it in general talk, but thought this might be more appropriate.
HK just responds with their wrong dimensions, I could find the measures of the EC3 plug, but no info about the HXT 2 and 3.5mm.
Any guidance is appreciated!
by powersupply
Nov 05 2016 11:48pm
Forum: Battery Technology
Topic: Actual size of HXT 2mm and 3.5mm and EC2 Plugs?
Replies: 2
Views: 248

Actual size of HXT 2mm and 3.5mm and EC2 Plugs?

Hi all, I'm looking desperately for the outer dimensions of the https://hobbyking.com/en_us/hxt-3-5mm-gold-connector-w-protector-10pcs-set.html https://hobbyking.com/en_us/hxt-2mm-gold-connector-w-protector-10pcs-set.html https://hobbyking.com/en_us/ec2-male-battery-connector-5pcs-bag.html as hk's s...
by powersupply
Jun 30 2016 3:00am
Forum: E-Bike General Discussion
Topic: Was given a G-Bike - need a charger and probably a battery..
Replies: 59
Views: 4669

Re: Was given a G-Bike - need a charger and probably a batte

Congrats to your success! mine said brush, too, it's probably just a name of the company. Check my label, says the same but was 1kw brushless. https://endless-sphere.com/forums/viewtopic.php?f=2&t=49287 I doubt the "pump the rear brake lever to get power again to the motor", I think it might be the ...
by powersupply
Jun 18 2016 1:16am
Forum: E-Bike General Discussion
Topic: Battery charging away from home
Replies: 14
Views: 1561

Re: Battery charging away from home

In any case or country, I recommend a very long extension cord.
Mine is two prong and curled up in a watertight plastic bag.
More important than those stupid tools which came with my scooter.
by powersupply
Jun 18 2016 1:09am
Forum: E-Bike General Discussion
Topic: Was given a G-Bike - need a charger and probably a battery..
Replies: 59
Views: 4669

Re: Was given a G-Bike - need a charger and probably a batte

Sorry, don't know which controller, but check around here, and get a really simple/inexpensive one. No need to replace motor, never had issues as mentioned. I had issues with what turend out to be the wiring from/to the controller. Both of mine are brushless, I guess yours, too. Yes, passenger in ba...
by powersupply
Jun 17 2016 5:40am
Forum: E-Bike General Discussion
Topic: Was given a G-Bike - need a charger and probably a battery..
Replies: 59
Views: 4669

Re: Was given a G-Bike - need a charger and probably a batte

Display via 45 deg mirror, good enough for the occasional check.
by powersupply
Jun 17 2016 5:36am
Forum: Battery Technology
Topic: Arduino based charge balancer
Replies: 127
Views: 11914

Re: Arduino based charge balancer - thoughts

impressive, excellent work!
by powersupply
Jun 17 2016 5:28am
Forum: E-Bike General Discussion
Topic: Was given a G-Bike - need a charger and probably a battery..
Replies: 59
Views: 4669

Re: Was given a G-Bike - need a charger and probably a batte

Hi tronics, That pack looks really nice! Congratulations. My FET's clearly died of overcurrent. The way they were driven and the low resistance of the new cables/connectors and a "real" 20A battery with several C was like putting gasoline in a Dieselmotor (just figurative). But you have not touched ...
by powersupply
Jun 15 2016 1:48am
Forum: E-Bike General Discussion
Topic: Was given a G-Bike - need a charger and probably a battery..
Replies: 59
Views: 4669

Re: Was given a G-Bike - need a charger and probably a batte

The City G-Bike we are talking about (at least both of mine) have a low volatge cutout which would shut off long before the 12s battery was exhausted. I had 12 pieces of the 4s/5A batteries arranged as 4p12s. So I got me another of the 4s 5A and sliced and diced it so that I had a 4p13s configuratio...
by powersupply
Jun 14 2016 3:42am
Forum: Battery Technology
Topic: Arduino based charge balancer
Replies: 127
Views: 11914

Re: Arduino based charge balancer - thoughts

amberwolf, no apologies needed at all, my relais were a funny idea to begin with.
OP's idea is much better, if it'd only be for (at least) 13s and had an off the shelf xformer.
Most people won't need the fast cycle times, so it would be really feasible
by powersupply
Jun 14 2016 12:53am
Forum: E-Bike General Discussion
Topic: Was given a G-Bike - need a charger and probably a battery..
Replies: 59
Views: 4669

Re: Was given a G-Bike - need a charger and probably a batte

similar to replacing a diesel motor with gasoline motor, you'll face many obstacles. the cotroller will cut out with 12s, and the 13s might kill it when fully charged, this happened to me with that same bike. so add a controller to the whole calculation if you really want to go 13s at some point mos...
by powersupply
Jun 07 2016 4:25am
Forum: Battery Technology
Topic: Arduino based charge balancer
Replies: 127
Views: 11914

Re: Arduino based charge balancer - thoughts

I gave up on that idea because I couldn't find a CC charger with that voltage range (i.e. from 1s to say, 13s). Why not use a Lab PSU for it? Like the big Sorenson ones, etc. I have a DCS-55-55 that will do 0-55v (actually about 56v, IIRC), and 0-55A, externally adjustable via a rear panel connecto...
by powersupply
Jun 05 2016 9:33pm
Forum: E-Bike General Discussion
Topic: Was given a G-Bike - need a charger and probably a battery..
Replies: 59
Views: 4669

Re: Was given a G-Bike - need a charger and probably a batte

Hi again, those 12Ah 8S batteries Sunder recommended look really great! If it be now, I would get just 1 or 2 of those. Forget my approach, this is much less expensive and easier. Considering your 8m (flatland) ride, that's plenty. Yes, the main problem of the G-Bike is caused by the galvanic corros...
by powersupply
Jun 05 2016 2:56pm
Forum: Battery Technology
Topic: Arduino based charge balancer
Replies: 127
Views: 11914

Re: Arduino based charge balancer - thoughts

Sorry, forgot about your "dragster type thing", ther you of course would need fast polling times.
by powersupply
Jun 04 2016 3:20pm
Forum: Battery Technology
Topic: Arduino based charge balancer
Replies: 127
Views: 11914

Re: Arduino based charge balancer - thoughts

Very interesting approach. I also had a relay based idea, where during charging, the relay would disconnect the battery from the series if full. Thus it would be removed from the serial chain. The other pole of the relay would then "short" the series by that battery. The CC charger would need to adj...
by powersupply
Jun 02 2016 1:18pm
Forum: E-Bike General Discussion
Topic: Was given a G-Bike - need a charger and probably a battery..
Replies: 59
Views: 4669

Re: Was given a G-Bike - need a charger and probably a batte

original pic was too large for the board, here the smaller size, sorry about that.
CIMG7840em.jpg
by powersupply
Jun 02 2016 1:14pm
Forum: E-Bike General Discussion
Topic: Was given a G-Bike - need a charger and probably a battery..
Replies: 59
Views: 4669

Re: Was given a G-Bike - need a charger and probably a batte

You can bypass the whole key switch thing and use the large main fuse for on/off. Then use some chain to just lock in the bike. You could hide that fuse inside the saddle compartment. I found 3 things contributing to the stutter: Bad connection between battery and controller (all the way, it's a lon...
by powersupply
Jun 01 2016 12:21pm
Forum: Battery Technology
Topic: O2Micro OZ890 Based BMS Units
Replies: 130
Views: 27560

Re: O2Micro OZ890 Based BMS Units

Brainfuckr, I'm really interested in your work. I have a board stuck at 112 degrees (offset, internal temp) which goes to overtemp in no time. There are several of us with this problem. Hopefully your great work could rewrite that register. Do you think your program could run on a $5 Raspberry Pi Ze...
by powersupply
Aug 17 2014 5:50pm
Forum: Battery Technology
Topic: O2Micro OZ890 Based BMS Units
Replies: 130
Views: 27560

Re: O2Micro OZ890 Based BMS Units

Hi, sorry for the long delay, am back now. I had another board, could not fix the high temp error issue on the first board. Then I had to send back the adapter which Schwibsi was kind enough to lend me, so I could not fiddle around with byte wise programming. Were you able to resolve that problem me...
by powersupply
Feb 14 2014 2:10am
Forum: Battery Technology
Topic: O2Micro OZ890 Based BMS Units
Replies: 130
Views: 27560

Re: O2Micro OZ890 Based BMS Units

That is so cool!
Really great what you got going already.
Sometimes getting samples for the I2C isolators is the fastest (and definetly the cheapest) way. But be prepared for endless markteing calls (thank God for IPKall).
Thanks& please keep us posted!
by powersupply
Feb 07 2014 12:59am
Forum: Battery Technology
Topic: O2Micro OZ890 Based BMS Units
Replies: 130
Views: 27560

Re: O2Micro OZ890 Based BMS Units

Yes, those original TI made LM2596HV can operate up to roughly 60V. I was referring to the chinese knock offs, the 2596HV (sans LM) Some have the (clearly fake) NS logo, some are lasered as Ti etc. Even at large quantities the original TI LM2596HV is around US$1.50. No way these are used in the ment...
by powersupply
Nov 23 2013 12:59pm
Forum: Battery Technology
Topic: eBike Master Switch Design
Replies: 331
Views: 34661

Re: eBike Master Switch Design

Was more thinking of air than PCB, but you are right, not only do you have some sealing as mentioned, but the dielectric strength of air is around 1.5KV for the 0.5mm gap (or more with your wider gap now).
Proves again. looks can be deceiving, sorry.
by powersupply
Nov 22 2013 9:32pm
Forum: Battery Technology
Topic: eBike Master Switch Design
Replies: 331
Views: 34661

Re: eBike Master Switch Design

Doesn't that gap between B- and C- look too narrow?
I mean there might be up to 100V from what I see here.
Unless everything is sealed of course.

Suggestion, widen the gap and use another track inbetween for the gates, getting rid of the resistors and adding more distance in a way.

Looks great BTW.
by powersupply
Nov 18 2013 7:27pm
Forum: Battery Technology
Topic: connections for? EcityP Smart S5-13 BMS
Replies: 187
Views: 52202

Re: connections for? EcityP Smart S5-13 BMS

That depends on the slope and offset adjustments of the AD converter. My guess is that these corrections did not take place with the bad products from bmsbattery.com . I have two units with the exact same correction factors, which is statistically next to impossible. Maybe use the middle of the rang...