Hi All,
Have browsed for a while but decided to make an account and get more involved. I've been thinking about building an eBike for quite some time now and the Bafang BBSHD has motivated me to actually do it. The main use would be commuting as I do a 50km round trip and riding every day is taking it out of me. I average ~30kmh on the road bike, so would like to average at least 40kph and get in a bit quicker.
At this stage, I'm looking at using a 2008 Norco Bigfoot with slick tyres. I love DIY so am considering having a go at building a battery pack, plus an MOT spot welder if I decide soldering cells is not going to be viable.
I have access to 90 x sanyo uf103450PN cells (http://www.master-instruments.com.au/files/data_sheets/Lithium/Lithium%20Ion/Sanyo%20UF103450P.pdf / https://centrix-intl.com/details.asp?Parent2ID=3&productid=12802) at zero cost, so what I'm wondering is has anyone used these successfully?
It looks like their discharge rate is suitable, comparable to 18650s if you look at the graph.. am I missing anything?
So, seeing I have 90 x 3.7v cells / 14 (to make a 48v pack) = 6.42 then I should get 6 (not using the .42) x 2000mah (going by 4000mah on the donor 11.1v 6 cell packs) = 12ah.
I also have about a dozen 6v ~12ah SLAs as well (and 2 monster 12v 40ahs), but don't think these will be close to up to the task...
Thoughts? Am I on the right track? Good idea / bad idea?
EDIT: So I really need a concise figure on the C rate to work out the max amps it can deliver too right? BBSHD needing 30a continuous and a higher peak
EDIT2: Wait... 1000w (nominal) / 48v = 20.8a and 1600w (peak) / 48v = 33.3a... Motor has a 30a controller
Have browsed for a while but decided to make an account and get more involved. I've been thinking about building an eBike for quite some time now and the Bafang BBSHD has motivated me to actually do it. The main use would be commuting as I do a 50km round trip and riding every day is taking it out of me. I average ~30kmh on the road bike, so would like to average at least 40kph and get in a bit quicker.
At this stage, I'm looking at using a 2008 Norco Bigfoot with slick tyres. I love DIY so am considering having a go at building a battery pack, plus an MOT spot welder if I decide soldering cells is not going to be viable.
I have access to 90 x sanyo uf103450PN cells (http://www.master-instruments.com.au/files/data_sheets/Lithium/Lithium%20Ion/Sanyo%20UF103450P.pdf / https://centrix-intl.com/details.asp?Parent2ID=3&productid=12802) at zero cost, so what I'm wondering is has anyone used these successfully?
It looks like their discharge rate is suitable, comparable to 18650s if you look at the graph.. am I missing anything?
So, seeing I have 90 x 3.7v cells / 14 (to make a 48v pack) = 6.42 then I should get 6 (not using the .42) x 2000mah (going by 4000mah on the donor 11.1v 6 cell packs) = 12ah.
I also have about a dozen 6v ~12ah SLAs as well (and 2 monster 12v 40ahs), but don't think these will be close to up to the task...
Thoughts? Am I on the right track? Good idea / bad idea?
EDIT: So I really need a concise figure on the C rate to work out the max amps it can deliver too right? BBSHD needing 30a continuous and a higher peak
EDIT2: Wait... 1000w (nominal) / 48v = 20.8a and 1600w (peak) / 48v = 33.3a... Motor has a 30a controller
