What do you guys think of these batteries? I think the prices look good. Almost too good.
http://www.bmsbattery.com/87-72v
http://www.bmsbattery.com/87-72v
What about these Ebike Batteries?
- Thread starter biknut
- Start date
I hear they are good. The prices seem low until you see the shipping charges. High. Realll high. And I hear they take their sweet time so
Their price for their 24v10ah lipo pack doesn't cost much more than replacement SLA bricks. I have not factored in shipping as K1107 said. They are about half the price of a Ping battery pack.
I would look for some more reviews on endless-sphere.com before ordering.
I would look for some more reviews on endless-sphere.com before ordering.
Just a FYI. I used BMS 3 times and on my last battery, they used a delivery company (TNT) and it cost me $200 in shipping alone. At first the shipping was $109 on the invoice but I got an email saying that FedEx will no longer ship their batteries so I would have to pay an additional $98 to use TNT. If you notice on there website, there is a shipping box that you can add to your cart. It's in one dollar increments. The funny part is TNT shipping tried to bill me for an additional $36. I told them I'm not paying the invoice because I've already paid my shipping through BMS. Personally, I like BMS and recommend them and I think they make the oem batteries for your bike. You should ask them if you can buy one from them. Also, find out if you need more than the 30-60 amp BMS. Make sure you tell them which one you need. (The 30-60 or the 50-100 amp BMS.)
FYI
You can get two 12v 10AH batteries and run them in series for $40 shipped.
If I were going LiFePO4, I'd use Headways, Thundersky, or A123 cells. You really want to get the claimed number of cycles out of a pack for the amount that they cost.
My battery came separately from my bike. It was shipped from mainland China on TNT, and they sent me a bill for $36 too, saying something about customs charges.
I was thinking if I can't find a 72v battery pack in a size I like, I might buy two 36v packs and series them.
These are the lowest prices I have seen with free shipping. I don't see any 72v but they could probably make one however you want. http://www.vpower.hk/index.php
I'm really glad the market for batteries is opening up. Please let us know sources we can add to our web site with our e-kits. Our business model currently does not include battery sales. Just to risky for a small cap company.
INITIAL Battery cost is the largest barrier to entry. Even if you ride a lot it may be unfair comparison to a gas bike - but the numbers can get interesting.
If you can get a $350 battery, that's ~100 gallons of gasoline @ $3.50/gal, $350. If that battery takes you 20 miles per charge and cycles 1000 times that's 20,000 miles. The gasoline at 50 mpg = 5000 miles, 100 mpg = 10,000 miles per $350
Obviously just thinking out loud and there is much more to it than this.
INITIAL Battery cost is the largest barrier to entry. Even if you ride a lot it may be unfair comparison to a gas bike - but the numbers can get interesting.
If you can get a $350 battery, that's ~100 gallons of gasoline @ $3.50/gal, $350. If that battery takes you 20 miles per charge and cycles 1000 times that's 20,000 miles. The gasoline at 50 mpg = 5000 miles, 100 mpg = 10,000 miles per $350
Obviously just thinking out loud and there is much more to it than this.
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I was wondering if you can run two 36 volt batteries in series?
Would it effect the BMS on both packs?
That blue shrink wrap looks familiar. My battery from BMS Battery looks the same. I did talk to someone from BMS and she said they do make them for your bike.
Biknut,
I'm not sure if you saw my battery before I painted it but it sure looks like yours....minus 24 volts! Haha
I'm not sure if you saw my battery before I painted it but it sure looks like yours....minus 24 volts! Haha
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That blue shrink wrap seems common from a lot of manufacturers.
I think what we're probably looking at here is two 36v, 9 ah packs in series, parallel together making one 72v 18 ah battery.
I have very little understanding at this time about how the BMS is wired.
Each of the four individual packs above consist of 12 of these prismatic cells which I think are 3.2v, but not sure about that. That wouldn't add up to 36v, but might be right because my battery is only 72v when it's almost discharged. Hot off the charger it's about 87v.
me to bikenut. I hope if someone does a build a motorized bicycle battery they do pictures and instructions. to dangerous for me to try not knowing what I am doing. its a lot of volts and anything over 36v is considered high voltage which can kill you
Has anyony used VPower batteries and/or motors? The free shipping sure sweetens their deal, but are they any good?
This vid explains home made balancing somewhat. The wiring doesn't seem quite as complicated as I was thinking it would have to be. I thought each individual cell would have to have a wire, but apparently that's not the case. After watching this it gives me a little more confidence.
https://www.youtube.com/watch?v=1e_gj4dASl0&list=LLTUcDnZmv8jjdbWm90b2hLw&feature=mh_lolz
https://www.youtube.com/watch?v=1e_gj4dASl0&list=LLTUcDnZmv8jjdbWm90b2hLw&feature=mh_lolz
Lots of stuff on utube to show how to build one its not that hard just time consuming and you can get all the stuff you need on ebay.
Yes they are good. But, their 1000w kits draw up to 42 amps so you need a good battery and you have to waterproof the connections or they can short out and burn stuff up. Rain plus getting my bike knocked over about 10 time ruined my controller and battery pack( I was new to this stuff then) but the motor still works great. That was 3 or 4 years ago. Their hub motors and wheels are top notch( better than the golden motors hub and rim I had).
I have it on a Huffy cruiser but I still need a battery for it. I would recommend them because for the price they have really good stuff.
