Discharge board for NiMH/NiCd or LiPo?

[alex.guzun]

Hi all,
tried a Find in forums function, but didn't get any result.
So.. is it too hard to make something like this?

http://www.lrp.cc/fileadmin/lrp_produktbilder/_preview/41370.jpg/prv_prd_390x261_41370.jpg
http://www.lrp.cc/en/products/charge/discharge-equipment/produkt/concept-battery-conditioner-2/details/

or
http://www.mirageracing.com/graphics/news/2008032501/nos_01.jpg
http://www.mirageracing.com/news/article/2022
http://www.redrc.net/2007/10/lrp-concept-battery-conditioner-2/

Or maybe something from Muchmore's
http://www.redrc.net/wp-content/uploads/2007/09/muchmoredr4kdischarger.jpg
http://www.much-more.co.kr/testbbs/bbs3/bbs_view.asp?index=bbs&page=1&no=1&t_stat=&curRef=1&curStep=0&curLevel=0&menu_index=

Thank you in advance.

[Ron van Sommeren]

Alex, why would one want to shorten cell life??

Vriendelijke groeten ;) Ron

[Ema]

Hi,
it's not very difficult to build a cell discharger, however you need a lot of parts and a good PCB.

In the past I was thinking to build my own cell discharger but I realised that the project is too expensive.

For an idea of what you need, check out this link:

http://www.seven-segments.com/index.php?action=menucats&id=14

Bye
Emanuele
P.S. Ron, in RC car racing a cell discharger is mandatory, especially with the new type of Ni-Mh cells. If the cell are not well equalized before the charging process they may explode :eek: :eek: .

[alex.guzun]

So in your opinion it's better to buy one?

P.S. Batteries could not function well, also.

[Ema]

If you need only one or two units, yes, in my opinion it's better to buy one.

If you want a unit with a variable cut-off thresold the cheapest one is the Lrp/Nosram (actually the same).

If the cut-off thresold is not an issue the cheapest is the new Much More unit (available also for stick pack) :

http://www.muchmoreracing.it/_images/_products/prd_10869/{8D82D06C-39C1-4963-B95B-EB661F404F3F}_big_cellequalizer.jpg

Bye
Emanuele