Hi There,

I'm looking to build a 9.6 battery pack from three 18560 batteries. 9.6v BMS boards seem to be a rarity so I got some off eBay like this: https://www.ebay.co.uk/i/252449024090. I have had a number of these now and when I connect up the batteries to the board all points seem return the correct voltage - i.e. at around 3.9, 7.8, 11.6v at each point resepectively. But in each case I get no output from the P+ and P- points. I had throught maybe the battery was undercharged so I connected these points to a power supply for a few minutes and now they register 11.6v which is the battery value. I had thought the idea of these boards was to give out a steady 9.6v - 10.8v that I could use on the device (an old camcorder), maybe I am misunderstanding.

I've attached an image of the current board setup. Can anyone offer any advice on anything I am doing wrong.

Thanks for you help.

 

Looks correct to me, have you measured the voltage at each stage, 3.6, 7.2, 9.6V etc,,
I use this type and never have any problems..

https://www.ebay.co.uk/itm/3S-12V-1...trksid=p2386202.c100677.m4598&redirect=mobile

 

That board is for LiFePo cells, which are 3.2V, hence 9.6 for 3.

Bob

 

Ah right. That makes sense. Thanks for your reply. Have ordered some 3.2v ones.