Search found 15 matches

by transposon
Sep 13 2019 8:50pm
Forum: Battery Technology
Topic: First ebike build. I have some battery questions.
Replies: 22
Views: 469

Re: First ebike build. I have some battery questions.

OK, thanks to all of the replies here. After thinking about this for a while, I think I am going to build a 14s8p pack with one of the bluetooth BMSs and the salvaged cells. This will give me visual feedback on pack behavior. If I have trouble getting this pack to balance, I'll bite the bullet and b...
by transposon
Sep 13 2019 9:26am
Forum: Battery Technology
Topic: First ebike build. I have some battery questions.
Replies: 22
Views: 469

Re: First ebike build. I have some battery questions.

I would happily use a 14s pack with BMS if I could find a BMS with a decent balancing current. Don't get too hung up on balancing current. There are 2 types of balancing. Active balancing is where high cells charge low cells during operation. This theoretically permits maximum utilization of a pack...
by transposon
Sep 12 2019 1:09pm
Forum: Items for Sale - New
Topic: N.E.S.E. the no solder module
Replies: 314
Views: 36422

Re: N.E.S.E. the no solder module

agniusm wrote:
Sep 11 2019 11:00pm
transposon wrote:
Sep 09 2019 6:01pm
Has anyone successfully printed these enclosures with an Ender 3?
My machines are Ender 3, but they do not qualify as they are heavily modded. People at skateboard forums print with ender. What problems do you have?
I haven't tried printing yet. I was just checking.
by transposon
Sep 12 2019 10:41am
Forum: Battery Technology
Topic: First ebike build. I have some battery questions.
Replies: 22
Views: 469

Re: First ebike build. I have some battery questions.

Would it be possible to have a 14s battery with a BMS but have 2 external sets of 7s balance leads for balancing on a hobby charger if needed?
by transposon
Sep 12 2019 10:19am
Forum: Battery Technology
Topic: First ebike build. I have some battery questions.
Replies: 22
Views: 469

Re: First ebike build. I have some battery questions.

I will test each individual cell for capacity and resistance. I plan on making parallel groups so that they each have roughly the same capacity.


I would happily use a 14s pack with BMS if I could find a BMS with a decent balancing current.
by transposon
Sep 11 2019 9:27pm
Forum: Battery Technology
Topic: First ebike build. I have some battery questions.
Replies: 22
Views: 469

First ebike build. I have some battery questions.

I plan on building my first ebike with a 1000W rear hub motor. I have 2 6s 10Ah multistar lipos but I want to build another pack for additional range. I have access to lots of used 18650s from my IT department. Since I already have the equipment to test individual cell capacity and resistance, and I...
by transposon
Sep 11 2019 8:04pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1100
Views: 93163

Re: bluetooth BMS?

I would also like to know what the current recommendation is. I am building a homemade pack from different 18650s so I would like something with a high balancing current in case the pack is prone to going out of balance. Right now now I am considering just breaking a 14s pack in 2 7s sections for ch...
by transposon
Sep 09 2019 6:01pm
Forum: Items for Sale - New
Topic: N.E.S.E. the no solder module
Replies: 314
Views: 36422

Re: N.E.S.E. the no solder module

Has anyone successfully printed these enclosures with an Ender 3?
by transposon
Sep 09 2019 10:18am
Forum: Battery Technology
Topic: Thoughts on this 3D printable solderless 18650 holder
Replies: 3
Views: 193

Re: Thoughts on this 3D printable solderless 18650 holder

What do you mean by thick?

I have seen the N.E.S.E. units and am tempted, but they are expensive.
by transposon
Sep 08 2019 8:27pm
Forum: Battery Technology
Topic: Thoughts on this 3D printable solderless 18650 holder
Replies: 3
Views: 193

Thoughts on this 3D printable solderless 18650 holder

https://www.thingiverse.com/thing:3395932

Any thoughts on this design? I was considering using some kind of compressible foam between the nickel strip and the screw on cap. If one was to use a few layers of nickel, we could probably pull a decent amount of current.
by transposon
Sep 01 2019 11:52pm
Forum: Battery Technology
Topic: Can I add 2 3s Lipo packs to my setup?
Replies: 1
Views: 96

Can I add 2 3s Lipo packs to my setup?

I am building my first ebike. I purchased a pair of Multi Star 6s 10Ah Lipos for my 1000W 48V conversion kit. I am considering increasing the volts for a little more pep. HK has 3s 5Ah packs. Could I place two of these in parallel and then connect them in series with each of the 6s packs? (3s + 3s i...
by transposon
Nov 25 2011 4:10pm
Forum: E-Bike General Discussion
Topic: will this bike make a decent conversion?
Replies: 14
Views: 956

Re: will this bike make a decent conversion?

it looks like the front fork has some suspension built in. Would this make a rear hub motor preferable?

the bike is a gary fisher tarpon
by transposon
Nov 25 2011 8:46am
Forum: E-Bike General Discussion
Topic: will this bike make a decent conversion?
Replies: 14
Views: 956

Re: will this bike make a decent conversion?

wow, thanks so much guys for the quick and thorough help.

I am also considering a mtb, it has steel forks except for the fork crown, it is metal but a magnet doesn't stick. would this pose a problem?
by transposon
Nov 24 2011 6:13pm
Forum: E-Bike General Discussion
Topic: will this bike make a decent conversion?
Replies: 14
Views: 956

Re: will this bike make a decent conversion?

I was thinking of a top speed of about 25mph. What if I were to reinforce the front fork?

I also have a steel mtb that has non-steel fork crowns. would that work better?
by transposon
Nov 24 2011 4:50pm
Forum: E-Bike General Discussion
Topic: will this bike make a decent conversion?
Replies: 14
Views: 956

will this bike make a decent conversion?

I am a ebike noob. I have a schwinn prelude 700c road bike. It has an aluminum frame with steel forks. I was thinking of a front dd hub motor for simplicity.

here is a link for reference.

http://www.amazon.com/gp/aw/d/B004QM22H ... mdp_mobile