Timma2500
1 kW
Hi all.
I'm looking at various 37v 12ah - 20ah Li-Po options for my project bike. At the moment the choices include packs from battery space.com but these are limited to 40amp so would have to buy two and wire up in parallel. The advantage of these for my need is the bms built into it for over/under charge and current limit with chargers that are resonably priced.
The other option are the 12ah packs from TrueRc.net but being rc packs, there is no battery protection/ balance built in and chargers/balancers cost a fortune. My question is could i protect the batt from under volting when on the bike and over volting/ balancing on the charger? Any one used these or similar rc style packs? Can anyone recommend a bms/ balancer/ charger combo? Any chargers to stay away from?!
I've been designing a compact drive system to be housed along with the battery(s), esc etc in a custom aluminium mtb frame to be fabricated by myself (aluminium fabricator). I have settled on a combination of a C.C. HV110 esc, Exceed RC 245kv 63-64 (2700w) motor linked via a 15mm HTD belt and pulleys to a Rino Mechanical PGC23 40:1 Planetary Gearbox.
On the output shaft of the box will be a 20T/24T granny gears bolted together on an ENO f.w. The motor will drive from the 24T and 20T will connect to the 22T ENO f.w. on the trials cranks via another short chain.
From my rough calcs this gives an effective front chainwheel of 29T for pedalling which is all i want as it will be used for proper mountainbiking ( steep hills etc...) as well as commuting. The geabox output freewheel is essentially used as a jackshaft for pedaling. Frame design at this stage will look similar to my carbon TerraShark which is sort of similar to the optibike i guess. I will try to scan a drawing later to post up.
Cheers guys,
Paul
P.S. Matt - your single and dual stage drives are a work of art!
I'm looking at various 37v 12ah - 20ah Li-Po options for my project bike. At the moment the choices include packs from battery space.com but these are limited to 40amp so would have to buy two and wire up in parallel. The advantage of these for my need is the bms built into it for over/under charge and current limit with chargers that are resonably priced.
The other option are the 12ah packs from TrueRc.net but being rc packs, there is no battery protection/ balance built in and chargers/balancers cost a fortune. My question is could i protect the batt from under volting when on the bike and over volting/ balancing on the charger? Any one used these or similar rc style packs? Can anyone recommend a bms/ balancer/ charger combo? Any chargers to stay away from?!
I've been designing a compact drive system to be housed along with the battery(s), esc etc in a custom aluminium mtb frame to be fabricated by myself (aluminium fabricator). I have settled on a combination of a C.C. HV110 esc, Exceed RC 245kv 63-64 (2700w) motor linked via a 15mm HTD belt and pulleys to a Rino Mechanical PGC23 40:1 Planetary Gearbox.
On the output shaft of the box will be a 20T/24T granny gears bolted together on an ENO f.w. The motor will drive from the 24T and 20T will connect to the 22T ENO f.w. on the trials cranks via another short chain.
From my rough calcs this gives an effective front chainwheel of 29T for pedalling which is all i want as it will be used for proper mountainbiking ( steep hills etc...) as well as commuting. The geabox output freewheel is essentially used as a jackshaft for pedaling. Frame design at this stage will look similar to my carbon TerraShark which is sort of similar to the optibike i guess. I will try to scan a drawing later to post up.
Cheers guys,
Paul
P.S. Matt - your single and dual stage drives are a work of art!