Shop our Airplanes Products Drone Products Sales
Thread Tools
Jan 04, 2003, 07:34 PM
Registered User

Connecting Qualcomms in Paraller - Can you do it with the circuit board on?

Somebody posted some step-by-step instructions for making a Parallel configured pack using (2) 2-cell Qualcomm Lion Packs but he removed the Protection Circuit Board. Is it possible to make up these Parallel packs & still keep the circuit board on?


Sign up now
to remove ads between posts
Jan 04, 2003, 08:16 PM
Senior Moment Member

We seem to be following the same trail today.

That was probably me. Here's the link.

Parallel QC 830 pack

I always used the protection circuit between the charger and pack. I still used it with the parallel packs. They plugged in just the same. It's critical on voltage but the QC circuits give you a little more leeway on amperage.

But if it doesn't work at first try another protection circuit. Some are better than others. I have one that won't work with the parallel packs, but I have a bunch that do.


Oops, guess I didn't answer your question. You can leave the circuit on the packs, but you'll have to use a different cell configuration that what I show in the link. I would hook it up with some test leads first to make sure the PC works before it was soldered up.
Last edited by Capt. Electron; Jan 04, 2003 at 08:26 PM.
Jan 04, 2003, 08:28 PM
Registered User
Do you fly with the Protection circuit on the Pack? I guess my question is that do you leave the Prot circuit permanently on the Packs or do you just have (1) Protection circuit "Somewhere" loose between the Pack & the charger. Here's where I am lost, do you use just (1) Prot Circuit board for the whole parallel pack or leave both Boards on both packs?



Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
What can you do with 2 edf-40 ducted fan motors? Daddy-O Foamies (Kits) 1 Jan 12, 2005 12:39 PM
what do you do with your planes in the winter? t.nollett Electric Plane Talk 20 Nov 12, 2003 09:13 AM
What can you do with a CD-ROM -motor... Petri Nygren Power Systems 0 Jan 23, 2003 05:50 AM
What can you do with a hornet CP? volare Electric Heli Talk 1 Nov 03, 2002 04:40 PM