Front 24V brushed hub, rear gas drive, on-demand recharge.

General Discussion about electric bicycles.
User avatar
fechter   100 GW

100 GW
Posts: 12907
Joined: Dec 31 2006 3:23pm
Location: California Bay Area, USA

Re: Front 24V brushed hub, how to regen?

Post by fechter » Apr 03 2016 12:39am

The boost converter is the right idea. You might be able to find a more powerful one or use two in parallel (not sure this is possible). 5A is pretty good though.

28.0 to 28.2V sounds good. The batteries will be pretty charged by that voltage. You could run at that voltage for fairly long periods without gassing the cells. Most lead bricks will have it printed right on the battery.
"One test is worth a thousand opinions"

augidog   10 W

10 W
Posts: 84
Joined: Sep 29 2012 11:49am

Re: Front 24V brushed hub, how to regen?

Post by augidog » Apr 03 2016 1:54am

....
Last edited by augidog on Jan 08 2018 3:29am, edited 2 times in total.

User avatar
fechter   100 GW

100 GW
Posts: 12907
Joined: Dec 31 2006 3:23pm
Location: California Bay Area, USA

Re: Front 24V brushed hub, how to regen?

Post by fechter » Apr 03 2016 10:29am

Ah, I missed about the battery type somewhere. I was going by the pics.

Here's the tech data for those batteries:
http://www.houseofbatteries.com/documents/K2B12V7EB.pdf
They recommend 14.6v charge voltage, so you might want to set the converter a bit higher, like 29V.
"One test is worth a thousand opinions"

augidog   10 W

10 W
Posts: 84
Joined: Sep 29 2012 11:49am

Re: Front 24V brushed hub, how to regen?

Post by augidog » Apr 03 2016 1:25pm

....
Last edited by augidog on Jan 08 2018 3:29am, edited 1 time in total.

augidog   10 W

10 W
Posts: 84
Joined: Sep 29 2012 11:49am

Re: Front 24V brushed hub, how to regen?

Post by augidog » Apr 06 2016 12:35am

....
Last edited by augidog on Jan 08 2018 3:29am, edited 1 time in total.

User avatar
fechter   100 GW

100 GW
Posts: 12907
Joined: Dec 31 2006 3:23pm
Location: California Bay Area, USA

Re: Front 24V brushed hub, how to regen?

Post by fechter » Apr 06 2016 11:04pm

I think that's the first real parallel hybrid bike I've seen.
"One test is worth a thousand opinions"

augidog   10 W

10 W
Posts: 84
Joined: Sep 29 2012 11:49am

Re: Front 24V brushed hub, how to regen?

Post by augidog » Apr 08 2016 4:30pm

....
Last edited by augidog on Jan 08 2018 3:29am, edited 2 times in total.

augidog   10 W

10 W
Posts: 84
Joined: Sep 29 2012 11:49am

Re: Front 24V brushed hub, how to regen?

Post by augidog » Apr 08 2016 4:31pm

....
Last edited by augidog on Jan 08 2018 3:30am, edited 1 time in total.

User avatar
Rassy   1 MW

1 MW
Posts: 1979
Joined: Apr 08 2007 10:58am
Location: Eugene, Oregon USA

Re: Front 24V brushed hub, how to regen?

Post by Rassy » Apr 08 2016 11:09pm

Congratulations on getting your serial hybrid going the way you wanted it to. I'm going to have to get down to Reedsport one of these days and see it all in person. :D
-Rassy-
One Tadpole Trike equipped with a Bafang BBS02
https://endless-sphere.com/forums/viewt ... 28&t=69419
One Delta Trike equipped with a Bafang BBS02
https://endless-sphere.com/forums/viewt ... 0#p1291260

augidog   10 W

10 W
Posts: 84
Joined: Sep 29 2012 11:49am

Re: Front 24V brushed hub, how to regen?

Post by augidog » Apr 08 2016 11:30pm

....
Last edited by augidog on Jan 08 2018 3:30am, edited 1 time in total.

User avatar
Rassy   1 MW

1 MW
Posts: 1979
Joined: Apr 08 2007 10:58am
Location: Eugene, Oregon USA

Re: Front 24V brushed hub, how to regen?

Post by Rassy » Apr 09 2016 9:35am

Sorry, I have no idea how to properly define your rig. I had seen fechter call it a parallel hybrid, but when I was typing serial hybrid is what came out. Of course, being able to supply pedal power is a third leg (pun intended) of the hybrid. :D

I'm thinking Friday, May 13th. I'll give you a call in the next couple of weeks.
-Rassy-
One Tadpole Trike equipped with a Bafang BBS02
https://endless-sphere.com/forums/viewt ... 28&t=69419
One Delta Trike equipped with a Bafang BBS02
https://endless-sphere.com/forums/viewt ... 0#p1291260

augidog   10 W

10 W
Posts: 84
Joined: Sep 29 2012 11:49am

Re: Front 24V brushed hub, how to regen?

Post by augidog » Apr 09 2016 2:55pm

....
Last edited by augidog on Jan 08 2018 3:30am, edited 1 time in total.

User avatar
fechter   100 GW

100 GW
Posts: 12907
Joined: Dec 31 2006 3:23pm
Location: California Bay Area, USA

Re: Front 24V brushed hub, how to regen?

Post by fechter » Apr 09 2016 3:40pm

Serial would be if the gas engine drove a generator and all the mechanical power was electric/human.

I guess it is tribrid too. With full throttle on the gas, electric, and pedaling, you should be able to accelerate pretty briskly.
"One test is worth a thousand opinions"

augidog   10 W

10 W
Posts: 84
Joined: Sep 29 2012 11:49am

Re: Front 24V brushed hub, how to regen?

Post by augidog » Apr 09 2016 3:52pm

....
Last edited by augidog on Jan 08 2018 3:30am, edited 1 time in total.

augidog   10 W

10 W
Posts: 84
Joined: Sep 29 2012 11:49am

Re: Front 24V brushed hub, rear gas drive, on-demand recharge.

Post by augidog » Jan 02 2018 8:06am

....

Post Reply