Open-source alternative to DeWalt DC9360 since Stanley shaft

Joined
Sep 19, 2007
Messages
57
Location
Madison, WI USA
Short, semi-chronological background to the shaft: A123 develops the best all-around battery, which is cycle-life-cost-competitive with lead-acid, and has best power density along with very good energy density. DeWalt incorporates these into their DC9360 packs. This poster designs simple hack to unleash the DC9360 for alternative uses. Kfong expertly develops and sells hardware to implement this hack. Stanley buys B&D/DeWalt. Short-sighted Stanley surreptitiously substitutes Samsung cells for A123. Hackers and more legitimate customers lose out.
http://www.youtube.com/watch?v=ZqPX46RX3gY

Meanwhile, A123 develops 7Ahr 32157 cells more appropriate for e-bike use. Also, back at Endless-Sphere, open-source BMS and chargers are developed.
http://www.a123rc.com/goods-474-LiFePO4+Battery+%28A123+32157%29.html

I am still using my unadulterated DC9360s after well over 1000 charges. They are performing as advertised by A123 and originally guaranteed by DeWalt. I haven't scoured the hundreds of pages on this forum for details about the open source electronics, but am wondering: Has there been a discussion of developing charging and discharging hardware specifically for the 7Ahr 32157 A123 cells, in 10 to 20 cell series packs? Could this hardware be made available to all of us as SEEED project?
http://www.seeedstudio.com/propagate/
 
Agreed that the 15 Ahr cell price seems to be a closeout, since cost is $45 each for ten. In any case, an open-source, balancing charger with low voltage cutoff discharge protection for A123 cells ought to be compatible with cells of varying capacity.
 
CyclemotorEngineer said:
...I am still using my unadulterated DC9360s after well over 1000 charges...
Bump...

How many AH are you getting out of them now?

I'm down to about 1.8 AH per pack and wondering if mine are on the way out or that's within the bounds of normal - given that they've been abused somewhat having been run singly for awhile until somebody pointed out that was hard on the battery.

Mine have nowhere near 1,000 charges on them. I would be surprised if the number were over 300.
 
CyclemotorEngineer said:
Meanwhile, A123 develops 7Ahr 32157 cells more appropriate for e-bike use.
http://www.a123rc.com/goods-474-LiFePO4+Battery+%28A123+32157%29.html
Those are the cells I want to use on my next build. It will cut down on all the soldering and less work if I cell fails, than using 3X or 4X the M1 2.3AH cells.

After seeing some threads on the prismatic A123's puffing, I don't want to use those lol. They are just not as durable as the cylindrical cells. The prismatics are huge, bulky, and don't efficiently fill the triangle up.
 
One of my buddies just got a 20v dewalt lithium drill. The torque loss vs his nicad 18v packs is very obvious. I'm about ready to hack his packs open and see if we can put a123 M1 cells inside.
 
Hi Pete,

I like Austin (and New Orleans) better than Philly, for this and a few other reasons.
 
PeteCress said:
What would be the fallacy in putting two Bosche Fat Packs in series to get 36v and 4+ AH?

viz: http://tinyurl.com/a5q3e4d

What about parallel? Would 18v be too low to achieve 12 mph?
My Fatpacks are 36 volts each and I parallel 6 of them for my wife's trike. When did Fatpacks go to 18 volts? The 36 volt ones were purchased several years ago at $45 each delivered. Now they are simply too expensive to buy. 18 volts is too low for a reasonable amount of power and speed, IMHO.
otherDoc
edit: Those Sony Konions are simply the best cells as they still self balance without a BMS.
 
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