Chad, I'm not seeing like that at all. I see it as the lipo + and charger/load + are connected to the large pad on the right. The lipo - is connected to the pad on the left. And the charger/load is connected to the middle pad. Essentially, the LVC just disconnects the - lead if an error occurs.

Which would mean there are two grounds?


@Chadworkz: I thought the module would be supposed to be separate from th charger device, as in only the lipo, module, and a connector (for charging AND connecting to the device, but not at the same time)

Two grounds? I think we are all making this a WHOLE lot more complex than it is. See the pic below.


http://rc-monster.com/forum/attachme...5&d=1274071038

They probably made it like this so that the "charger" also powers the circuit when it is plugged in, kinda like a laptop or whatever.

If the LiPo and Device positives are connected to the same pad, the LiPo will directly power the Device without passing through the Protection circuitry.

Actually, we need to wait until we see the actual instructions for this.

Not if the grounds are seperate, which they are. Normally, you see circuit interruption in the + lead, but there is nothing wrong with switching the ground lead. In fact, that's how old-style dome lights are switched on via pin switches in older cars. Car horns operate in a similar way. Just depends on the application. Could just be a matter of the circuit using an NPN vs a PNP transistor to do the switch action...

Okay, do you see the labeling though Brian? If you ignore the drawing they provide, doesn't it look like they are switching the + batt terminal?

Got a quick email back...


"Hi Justin,

Thank you for your e-mail. The circuit diagram that you provided does
look correct.


Best regards,
Don Clark
Batteryjunction.com

-----Original Message-----
From: CustomerService
Sent: Monday, May 17, 2010 12:16 AM
To: CustomerService
Subject: Contact Request Form

My Question

Name: ***************Justin *******
Comment: ************Hi, your labels on the Protection Circuit Module
(PCB) for a single cell Li-ION:
http://www.batteryjunction.com/prcimopcbfor.html

Is quite confusing.
I'm not sure which the P , B *and such are actually going to, so would
like to make sure.

If I wire up a battery, to connect to this module, which will then wire
out to a connector, would this diagram be correct? Thanks!

http://i53.photobucket.com/albums/g6...CMDiagram0.png

That photobucket pic is missing. It would be nice to know what the proper wiring was...

zero: The labeling is a bit "crappy", but the pic I posted makes sense assuming I am reading their label correctly.

No matter what, if I were to buy that device, I would be reverse-engineering it to make sure I knew what goes where. Those ICs are most likely commonplace for those types of modules, so a datasheet lookup should tell the tale.

I think it's around post 29

Ok cool, that's just like the diagram I posted except I put the battery on top and the load/charger (connector in post 29's diagram) on the bottom. Same connections though...

here is the fixed picture he posted above...

http://i53.photobucket.com/albums/g6...CMDiagram0.png

Thanks Chad:

I'll be waiting for the "MintyBoost" to see if I can even solder it up, and get it working before I order a LiPo and the board...