I have an Ebike that needs replacement batteries but the current Lithium Polymer types are just too expensive @ £209. In addition I have found no real benefit in using them, quite the reverse. Has anyone any advice on using other battery types (eg lead acid, lithium ion) or a source in the UK for individual cells? Would a 24V battery (about £65) do the job? an increase in range would be nice too. The motor is 200W intelligent brushless and the current battery is LiPo 26V 10.5AH.
LiPo batteries
- Thread starter wilscombe
- Start date
dogman dan
1 PW
It's a dilemma if money is limited. Lead acid sla's will cost less, be heavier, and go less distance, as well as wearing out fastest. They can still be a good choice if you ride just a few miles and don't ride everyday. Lifepo4, costs the most, weight is low if not lowest, goes great distance if the pack is big enough and lasts the longest in theory. But if money is tight, oh well, maybe next year. Lots of people have found nicad a good compromise between the two extremes.
Hi wilscombe,
Don't be to quick to give up on replacement LiPo's. I am running RC Lipos and they have been great. If your LIPO pack already includes a BMS and hopefully a temp sensor etc it should be pretty straight forward to just replace the cells.
I bought the cheapest I could find on ebay and they have spun out 1100 km so far with no signs of slowing. I run a 44.4 volt 3800mah pack, my ride to work is 12 km and I only use half its capacity with a couple of cranks to get me going and helping out up the hills.
Couldn't find the ones I bought but these should do the job.
http://cgi.ebay.com.au/2x-7-4v-4000mAh-15C-LiPo-RC-Rechargeable-Battery-7-4-WF_W0QQitemZ150318373483QQihZ005QQcategoryZ140974QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
For 26 volts you will need 7 cells (7x3.7v), wire them in parallel for 8000mah. For 80 pounds including postage it would be a pretty cheap option to get you going again.
Don't discharge them all the way and they should last, but make sure your BMS is up to it. Lipos can be dangerous if mistreated. I havent had much joy with Life to date, I have had to replace two dud cells in my ping pack so far and its done less than my Lipos.
Derek
Don't be to quick to give up on replacement LiPo's. I am running RC Lipos and they have been great. If your LIPO pack already includes a BMS and hopefully a temp sensor etc it should be pretty straight forward to just replace the cells.
I bought the cheapest I could find on ebay and they have spun out 1100 km so far with no signs of slowing. I run a 44.4 volt 3800mah pack, my ride to work is 12 km and I only use half its capacity with a couple of cranks to get me going and helping out up the hills.
Couldn't find the ones I bought but these should do the job.
http://cgi.ebay.com.au/2x-7-4v-4000mAh-15C-LiPo-RC-Rechargeable-Battery-7-4-WF_W0QQitemZ150318373483QQihZ005QQcategoryZ140974QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
For 26 volts you will need 7 cells (7x3.7v), wire them in parallel for 8000mah. For 80 pounds including postage it would be a pretty cheap option to get you going again.
Don't discharge them all the way and they should last, but make sure your BMS is up to it. Lipos can be dangerous if mistreated. I havent had much joy with Life to date, I have had to replace two dud cells in my ping pack so far and its done less than my Lipos.
Derek
Using a Bionx P350 and wish to add to it's longevity by adding a Ping 36V 20Ah LiFeP04 battery in parallel by plugging it in to to the OEM Bionx charge port with a XLR male plug, pin 2(+) and pin 4(-). Since the Ping also has a BMS would this system work without blowing a Halls Effect Sensor or the controller? Since Bionx doesn't make a LiFePo4 battery this, on the surface, would seem like a good idea???
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