George S.
Well-Known Member
Lishen 21700 Cells
I noticed that JAG35 (Jehu Garcia) is now selling Lishen 21700 cells. I wrote a summary of Chinese 21700 cells when I talked about the Liito Kala 15AH and 48v pack build around 21700 cells. The LK is the hundred dollar pack that is still around. The 217 is a very nice ebike cell. You can take 39 cells and make a 13s3p pack without a lot of effort. Spot weld. Since each cell is rated 13 amps, the three sets, the 3s, mean a discharge rate of 39 amps is possible (in theory). BafangUSA lists the BBS02 with a power max at 1200 watts (stock) with a 48v motor. That’s 25 amps so you’d be in a fairly safe area with a 39 amp setup from the battery. On my $400 online commuter, 1200 watts would be a bit scary, but it’s quite comfortable at 25 mph. I need it to outrun the dogs.
Battery Hookup is closing out the Tesla 21700 cells, now listed as salvage and 90% capacity, for $2.50. Not many left.
This is not a lot of money for 40 cells. We’re talking $150 for a pack that seems to equal or exceed what ebike companies sell. If you used 4 sets and 14 series, it would really be a keeper (14s4p). Of course Liito Kala will sell you a 20ah and 48v pack, shrink, for around $160. A kwh and not much weight. I figure LK is buying 1000's of cells, robot welding them, and putting 2 bucks worth of shrink wrap on them. Plus the $5 BMS. The free shipping is getting pretty rare. Other stuff ships for $50.
I noticed that JAG35 (Jehu Garcia) is now selling Lishen 21700 cells. I wrote a summary of Chinese 21700 cells when I talked about the Liito Kala 15AH and 48v pack build around 21700 cells. The LK is the hundred dollar pack that is still around. The 217 is a very nice ebike cell. You can take 39 cells and make a 13s3p pack without a lot of effort. Spot weld. Since each cell is rated 13 amps, the three sets, the 3s, mean a discharge rate of 39 amps is possible (in theory). BafangUSA lists the BBS02 with a power max at 1200 watts (stock) with a 48v motor. That’s 25 amps so you’d be in a fairly safe area with a 39 amp setup from the battery. On my $400 online commuter, 1200 watts would be a bit scary, but it’s quite comfortable at 25 mph. I need it to outrun the dogs.
Battery Hookup is closing out the Tesla 21700 cells, now listed as salvage and 90% capacity, for $2.50. Not many left.
This is not a lot of money for 40 cells. We’re talking $150 for a pack that seems to equal or exceed what ebike companies sell. If you used 4 sets and 14 series, it would really be a keeper (14s4p). Of course Liito Kala will sell you a 20ah and 48v pack, shrink, for around $160. A kwh and not much weight. I figure LK is buying 1000's of cells, robot welding them, and putting 2 bucks worth of shrink wrap on them. Plus the $5 BMS. The free shipping is getting pretty rare. Other stuff ships for $50.
