Environment & Energy

Fumesucker

(45,851 posts)

18. The battery doesn't look like much but it can give me about 30 miles of light to moderate assist

Tue Dec 17, 2013, 06:32 PM

Dec 2013

Here it is without the cardboard and duct tape wrapper. Each vertical row of cells is a parallel bank of five, there are twelve banks in series, the skinny black and red wires on the multipin plugs are for monitoring each bank of parallel cells separately, the two gray wires at upper left and right are the main power leads and the short, thick black wire in the middle jumps 2 24V sub packs to make the 48V.

Still thinking about and trying different things to find the best way to go about this, I've managed to find quite a few ways not to do it.

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Power storage in old batteries [View all] kristopher Aug 2013 OP

It sounds like a good idea ..... oldhippie Aug 2013 #1

I'm using old 18650 cells salvaged from dead laptop batteries for my electric bike Fumesucker Aug 2013 #2

When you say "balance charge" the pack .... oldhippie Aug 2013 #3

Each individual parallel cell group gets charged to 4.1 ~ 4.2 v during a balance charge Fumesucker Aug 2013 #4

That's really interesting, thanks! oldhippie Aug 2013 #5

This winter I think I am going to do this. lumberjack_jeff Dec 2013 #7

Computer repair shops tend to stack up dead laptop battteries Fumesucker Dec 2013 #9

I'd love to know more about how you configured your bike pack... lumberjack_jeff Dec 2013 #10

I'd be leery of those cells Fumesucker Dec 2013 #12

Okay, I found a decent local source of "dead" laptop batteries lumberjack_jeff Dec 2013 #20

Good find there Fumesucker Dec 2013 #21

A $40 education? I can afford that. lumberjack_jeff Dec 2013 #22

I'm using a ten cell (36V) controller on twelve cells (44V), Fumesucker Dec 2013 #23

That makes sense. lumberjack_jeff Dec 2013 #24

I've actually been twenty five miles and had some but not a lot of battery left at the end Fumesucker Dec 2013 #25

Here's my version 1.0 lumberjack_jeff Feb 2014 #26

I love it. kristopher Feb 2014 #27

My BMS is: watch the voltages carefully. lumberjack_jeff Feb 2014 #28

That's very nice, congratulations I'm impressed Fumesucker Feb 2014 #29

Thanks! I'm told it's a 9C clone lumberjack_jeff Feb 2014 #30

Sorry to resurrect an old thread, but I just converted my wife's bike lumberjack_jeff Jun 2015 #31

I looked hard at the Xiongda a year or so ago, they just didn't seem to have the reliability then Fumesucker Jun 2015 #32

In fairness, I can't attest to long term reliability at all. I have only a couple of miles on it. lumberjack_jeff Jun 2015 #33

I'm impressed as hell eridani Dec 2013 #14

The battery doesn't look like much but it can give me about 30 miles of light to moderate assist Fumesucker Dec 2013 #18

Very inventive. You should write that up in detail with illustrations eridani Dec 2013 #19

Hasn't this idea been around for a while? progressoid Aug 2013 #6

Anybody have an update on this story? oldhippie Dec 2013 #8

Richtfest für Schweriner Batteriepark (Topping out ceremony) Iterate Dec 2013 #11

It's called Reevolt - Your power will be needed. Make him happy! kristopher Dec 2013 #15

Shown at the Schwerin Handwerk fair in October, also available in a package deal Iterate Dec 2013 #16

the value to society of time-shifted electricity quadrature Dec 2013 #13

Essentially, 91,32€ net per month until the cabinet is paid for, 23,10€ afterwards. Iterate Dec 2013 #17