Hi folks
Considering harvesting my old Cytronex (with dead NiMh battery) to convert my new Trek bike as I'm missing the assistance. So I have the motor, 36V controller, but need new battery, BMS and charger. The main question is the battery issue.
Initially I thought about a DIY RC LiPo pack but read about it and I don't fancy all the risks that come with it. I want a reliable quality pack that I can charge off a commercially available charger and leave it to do it's thing without fire risk.
Requirements: 36V, 12-15A. Previous pack was a 2 kg 4 Ah NiMh pack, which was just about adequate for my 12 mile round trip when new. Not so after a 1 year of use. So I am aiming for 6 Ah which I think would be ideal with some reserve for deterioration. (maybe 8 Ah if 6 Ah not available).
Interested to read about an ideal looking cell - the Samsung INR-18650-30Q (for some reason googling it comes up with most entries about electronic cigarettes...). 3000 mAh, 15-20A rated current, 3.6V nominal.
A tiny 10S2P 6Ah pack made of these would be compact and provide the ideal range for my journey.
http://lunacycle.com/batteries/bare-cells/samsung-18650-30q-3000mah-18650-50-pack-wholesale/
(also heard some new LG cells are very similar).
Looked at the site people recommend, BMSbattery, and all their Li-ion packs are 12+Ah. Don't need this capacity/weight, though the price isn't bad. A 6-8 Ah version of this would be seem ideal:
https://bmsbattery.com/ebike-battery/785-36v145ah-case-08-bottle-panasonic-battery-pack-battery.html
also they do a LiPo pack.
https://bmsbattery.com/ebike-battery/474-36v9ah-lifepo4-alloy-01-case-ebike-battery-pack-battery.html
But basically, to large, too heavy for my needs.
A Li-ion 10S2P pack would be tiny, weigh about 1 kg and get me to work and back if I used the Samsung INR-18650-30Q. I would consider a self-build pack if I could get a recommendation for someone selling the genuine cells with solder tabs. I don't have a spot welder, only a soldering iron.
So can anyone recommend either:
- a reputable seller offering new cells with solder tabs (i.e. genuine Samsung/LG ones)
- a reputable seller selling Li-ion battery packs that are smaller capacity, ideally using these new cells
- a reputable seller that will custom build a pack to my requirements.
(and that post to UK. e.g. Lunacycles don't post internationally).
Have hunted but finding it difficult, plus regarding international suppliers not knowing who is offering a genuine product...
Thanks in advance.
Considering harvesting my old Cytronex (with dead NiMh battery) to convert my new Trek bike as I'm missing the assistance. So I have the motor, 36V controller, but need new battery, BMS and charger. The main question is the battery issue.
Initially I thought about a DIY RC LiPo pack but read about it and I don't fancy all the risks that come with it. I want a reliable quality pack that I can charge off a commercially available charger and leave it to do it's thing without fire risk.
Requirements: 36V, 12-15A. Previous pack was a 2 kg 4 Ah NiMh pack, which was just about adequate for my 12 mile round trip when new. Not so after a 1 year of use. So I am aiming for 6 Ah which I think would be ideal with some reserve for deterioration. (maybe 8 Ah if 6 Ah not available).
Interested to read about an ideal looking cell - the Samsung INR-18650-30Q (for some reason googling it comes up with most entries about electronic cigarettes...). 3000 mAh, 15-20A rated current, 3.6V nominal.
A tiny 10S2P 6Ah pack made of these would be compact and provide the ideal range for my journey.
http://lunacycle.com/batteries/bare-cells/samsung-18650-30q-3000mah-18650-50-pack-wholesale/
(also heard some new LG cells are very similar).
Looked at the site people recommend, BMSbattery, and all their Li-ion packs are 12+Ah. Don't need this capacity/weight, though the price isn't bad. A 6-8 Ah version of this would be seem ideal:
https://bmsbattery.com/ebike-battery/785-36v145ah-case-08-bottle-panasonic-battery-pack-battery.html
also they do a LiPo pack.
https://bmsbattery.com/ebike-battery/474-36v9ah-lifepo4-alloy-01-case-ebike-battery-pack-battery.html
But basically, to large, too heavy for my needs.
A Li-ion 10S2P pack would be tiny, weigh about 1 kg and get me to work and back if I used the Samsung INR-18650-30Q. I would consider a self-build pack if I could get a recommendation for someone selling the genuine cells with solder tabs. I don't have a spot welder, only a soldering iron.
So can anyone recommend either:
- a reputable seller offering new cells with solder tabs (i.e. genuine Samsung/LG ones)
- a reputable seller selling Li-ion battery packs that are smaller capacity, ideally using these new cells
- a reputable seller that will custom build a pack to my requirements.
(and that post to UK. e.g. Lunacycles don't post internationally).
Have hunted but finding it difficult, plus regarding international suppliers not knowing who is offering a genuine product...
Thanks in advance.