BMSBattery/ECityPower Experience

merganser said:
I'm pretty annoyed about the BPM motor - it has no manufacturer name or brand stamped on it (the CST has 8FUN cast in to the hub), and it looks like a cheap copy of a BPM2. The hub is a dull silver rather than the polished alloy shown on Bafangs web site.
Click to expand...
The fact that your BPM2 is dull grey doesn't mean anything. A lot of OEM customers don''t want the 8Fun logo or other labels on their bikes because they want to tell customers that it's their own special motors. I've seen matt grey ones before. It's one of the optional finishes. It's probably a genuine Bafang. You should give details of the flange damage to BMSBattery and ask them for your nuts/washers etc. The motors are shipped from Bafang in boxes of twos or fours with the motor s diagonally. After they've been re-shipped, the packaging collapses and the flanges bang into each other and end up like yours, so it would've happened before they shipped it. I'm sure they've seen a lot of these before. As you say, it''ll be OK. That isn't enough deformation to weaken it. Don't try and straighten it. I had two from another supplier and they were a lot worse than yours.

Loose spokes is very common. Normally you have to dish the wheel anyway, which will sort everything out
 
OK, I can buy that it maybe a genuine OEM motor but I ordered a BPM not a BPM2. It also appears to be a code 11 (280rpm) motor rather than the 201rpm I ordered, still I don't mind the additional speed. I really only ordered the BPM as a backup incase the CST doesn't workout but the damage won't help its resale value should I decide to ebay it.

BTW, I've no idea what rpm the CST, I can't see anything like a code marking - I'm hoping it is 280rpm.

I found the missing torque washers and nuts, they were hidden in a different box.
 
The 500w CST is 270 rpm and does about 22 mph max on the road. You can get another 2mph by joining the black and green wires on the 3-speed switch.

Several people reported that they got the BPM2 instead of the old BPM when they ordered the motor on its own. The CST has been completely re-designed inside from the BPM, and, I'm guessing, so has the BPM2, so its probably a better motor apart from the threaded side-plate, which makes maintenance tricky. Code 11 is a bonus.
 
dogman said:
To be sure, China didn't invent such dealings. At one point every single highway bridge in New Mexico was made with understrength concrete. It went on for about 25 years, in the 40's, 50's, 60's. The concrete guys sold a lot of sand at cement prices, then sold the real cement again. They just put the quality inspectors on salary. To this day the state is still working on replacing those bridges one by one.
Click to expand...
This happened in Vietnam for the last few years, Since Vietnam is growing, they're hiring alot of overseas companies to help them build things. One recent even that comes to mind is a Japanese company that was hired to do a bridge. The Jap company used cheaper materials and hustled the rest. The bridge fell apart months after completion and kill people. Money is the DEvil, :twisted: but you can't live without it :shock:
 
Hi guys, must buy a new Lithium battery pronto. BMS has a seemingly great deal in my mind.$239 includes shipping cost for a 36v 15a.h. battery with charger. They offer no warranty at all. Also if you receive it broken you have to pay the shipping $80 or so to send it back for replacement. . Is this a good company to deal with. Is there product good and are you guys out there using there batteries. Appreciate the input.
 
Good if it comes and works, bad if it comes and is not what you ordered, or it's broken.

Best china based battery vendors I know of, are Pingbattery and EM3ev.

Either one could still send you a pack that gets damaged by the shipper, or perhaps a good part fails right away. These vendors will at least send you what you need to get it fixed. In all cases, sending it back is simply not really an option.
 
Thanks for input. I think I will pay the extra and go with Ping. I know they have a 1year warranty and if something goes wrong after warranty period there is a e-bike shop in San Diego that is a dealer. He is authorized by Ping to do repairs.
 
psychonurse said:
Thanks for input. I think I will pay the extra and go with Ping. I know they have a 1year warranty and if something goes wrong after warranty period there is a e-bike shop in San Diego that is a dealer. He is authorized by Ping to do repairs.
Click to expand...

Wow! That is good news. Do you know of anyone else who is an authorized repair station for Ping?
otherDoc
 
Goldenmotor.ca is a another great place to order batteries in North America.

Gary, the owner, is a good dude and they sell good products. You get a warranty and someone on the same continent to deal with. I personally don't like Ping batteries (If my battery is going to look like an explosive device, I want to be the jerk that put it together)
 
Hi Cal3thousand, thanks for the Goldenmotor link. I really like what they have to offer. I also like the way they package there lipo batteries. I see they have a 1 year warranty. I didn't see anything about possibility of them fixing one of there batteries if out of warranty. Do you know anything about this? I have anderson connectors on the end of my controller. Will this be a problem for me to connect to the battery they send.
 
Not if you have two more andersons to attach to the battery. You might be able to ask them to send it with andersons on it.

You may need some extra wire between the two as well, depending on how long the wire on the battery is.

There really is nobody I know of in the business of repairing batteries. How would wrecked batteries be shipped legally for one? You want a known defective battery in shipping with your name on it? Hell no.
 
dogman said:
There really is nobody I know of in the business of repairing batteries. How would wrecked batteries be shipped legally for one? You want a known defective battery in shipping with your name on it? Hell no.
Click to expand...

exactly.... unless you live near my city ! :p

this is the pack i was writing about a while back.

BMS battery no longer returned his emails for support, he became a " problem customer " and they simply ignore him, and his problem.

So after fixing his friend's Pedego not too long ago:
http://ypedal.com/blog/Blog4-20130809.htm

Contacted me to ask if i could help him out..

48v pack made of 39 x 5ah cells, 13 series and 3 in parallel .

10 of the groups were fully charged at 4.1x v, 3 of the groups were nearly empty at 3.3x v...

Removed the BMS, topped off the low cells using the balance wires, all 3 took over 12ah each.. put the BMS back on, the BMS is shot, stuck in protection mode with output of 31.5v.. pack voltage 54v .. no loose sense wires..

problem is that the BMS is wired to the key switch to turn it on/off , at some point, customer bridged the key on/off with a solder blob to keep the BMS on all the time instead of using the key as it was flaking out.. the BMS has high drain while on standby and over the course of a few months managed to drain 3 of the cell groups to the point of pack capacity being less than 1ah usable.....

Just a poorly constructed pack, and even worse support... buyer beware.... if you are not willing to dig prod and probe.... i would not recommend buying from these guys.
 
Check out the balance wire routing... :shock:
48v-15ah-bmsbattery2.JPG

Running thin wire under sharp soldered tabs of other series cells with no protection is a recipe for disaster..

48v-15ah-bmsbattery3.JPG

With BMS removed, and cells manually balanced ( using 3010B at 2.5 amps ), took 3 days.. discharge test gave a usable 13ah with cells hovering 3.4x volts...

so it's usable... but has no BMS and unsafe... man-hours spent = 3 days .... worth it ?
 
Ypedal said:
Check out the balance wire routing... :shock:
View attachment 1

Running thin wire under sharp soldered tabs of other series cells with no protection is a recipe for disaster..



With BMS removed, and cells manually balanced ( using 3010B at 2.5 amps ), took 3 days.. discharge test gave a usable 13ah with cells hovering 3.4x volts...

so it's usable... but has no BMS and unsafe... man-hours spent = 3 days .... worth it ?
Click to expand...

Yes. Thank you for this info and taking the time to take pictures and post.

You may have saved some members from buying junk like this.
 
Ypedal said:
Check out the balance wire routing... :shock:
View attachment 1
Click to expand...

Man... I can solder better than that. And that's not saying much :mrgreen:

Makes me feel even better about my first noob battery, a Golden Motor 48V 10Ah. It made this thing look like absolute crap.

It's a good thing their chargers are better quality than their batteries. They should change their name to BMSChargers.com
 
psychonurse said:
Hi guys, must buy a new Lithium battery pronto. BMS has a seemingly great deal in my mind.$239 includes shipping cost for a 36v 15a.h. battery with charger. They offer no warranty at all. Also if you receive it broken you have to pay the shipping $80 or so to send it back for replacement. . Is this a good company to deal with. Is there product good and are you guys out there using there batteries. Appreciate the input.
Click to expand...

g1nko said:
I liked the price of the LiFePO4 36v 10ah and 12ah batteries from BMS Battery, but was shocked at the $280+ shipping charges
Click to expand...

Something has gone wrong somewhere. Typically speaking bmsbattery will (as stated in the small print) contact you after a month with further shipping costs. Stating there system works on weight, but your cells are dangerous so must go with a major carrier.
 
I have wrote this reply a few times, then deleted the comment.

I'm on the fence with BMSBattery, they're like an Alfa Romeo; I would use them, but wouldn't recommend them to a friend.

I have only had one issue and that was with a bulk charger that blew up. After weeks, plus at least 35 emails to a variety of people, they replaced it. I bought another charger and they shipped the replacement along with that.

Value for money though, difficult to beat if everything works. All my kits etc have previously.
 
With my one order they made enough mistakes to go down in history. Broke from factory,Broke due to poor packing, Wrong items then Zero communication. It was only an order for a bikes worth of stuff. Needless to say I'm not impressed with there warranty procedure. Basically they are just distributors. They like answering questions with a yes or a no, and achieve 50% accuracy.
 
http://www.bmsbattery.com/controller/546-s06-250w-imitation-torque-square-wave-controller.html
Has anyone tried one of these or have any info on these little gomers?
I know bms battery has a scetchy rep....but i would like to see the guts of this thing....

If anyone knows the origin or has a picture of the board, please share.



Searching for silence.
 
http://www.electricbike.com/sine-wave/
 
You must log in or register to reply here.

Similar threads

R
Little kids sleeper scooter
Replies
4
Views
1,083
Papa
Papa
T
Innotrace X1 Controller.
Replies
16
Views
4,477
TPEHAK
T
D
Battery compatibility questions for first build. Tips appreciated
Replies
4
Views
1,188
docw009
docw009
P
    • Like
Cycle life tests of mixed-technology cells
Replies
8
Views
2,306
Pajda
P
5
mystery wires daymak sunshine
Replies
0
Views
1,028
5kr3wf4c3
5
Back
Top