LVC/LVA for a 1 Cell LiPo?

[rawfuls]

Hey guys, I have a quick question.

Since I'm making a USB charger, I was thinking of using a single cell lipo, over 2 or 4 double A's.

Using a single cell lipo to power a USB charger directly would surely be moe efficient an last longer than standard AAs.

Now if I DO use a single cell, is there any way I can mod, or pick up a LVC, afterall, I don't want something smoking on me during class, nor so I want a puffed lipo in class!

Any help/suggestions/advice would be appreciated!

[suicideneil]

Shaz-zam:

http://www.batteryjunction.com/prcimopcbfor.html

[rawfuls]

Originally Posted by suicideneil

Shaz-zam:

http://www.batteryjunction.com/prcimopcbfor.html

Wow, didn't see that.
But what the hell do I do with that

[zeropointbug]

Is this USB charger for powering your laptop? If so, why not use A123 cells? You could buy a 15Ah prismatic for $37 + shipping and that could go in your bag with a few heat shrink layers on it for protection, or even some stiff rigid plate for added security?

[rawfuls]

Not a laptop charger, but rather a USB charger for little things, like my phone, iPod, etc...

[Chadworkz]

That PCB is wired between the LiPo battery and the device, and it acts as a voltage/amperage traffic cop, stopping the LiPo from over-discharging or doing exactly what you don't want it to do.

If you take apart certain Lithium batteries for things like cell-phones and audio-devices, you almost always see a similar PCB wired to the battery to keep it from over-discharging or over-charging.

The PCB linked to above is EXACTLY what you need.

[rawfuls]

Originally Posted by Chadworkz

That PCB is wired between the LiPo battery and the device, and it acts as a voltage/amperage traffic cop, stopping the LiPo from over-discharging or doing exactly what you don't want it to do.

If you take apart certain Lithium batteries for things like cell-phones and audio-devices, you almost always see a similar PCB wired to the battery to keep it from over-discharging or over-charging.

The PCB linked to above is EXACTLY what you need.

I meant more along the lines of what to solder it to (Positive to ?, Negative, etc.)

[Chadworkz]

It will come with instructions, but it is pretty self-explanatory...

[rawfuls]

So I would assume, the left, bigger pad is for the positive, right side is for the negative side, what's the middle for? Just a different cable to charge?

If it's THAT simple, I'll definitely be trying this out..

[Chadworkz]

Remember, it is used to make sure the battery is not over-charged, or over-discharged...so, that's why there are three pads. Two are positive (+) and one is a common ground/negative (-).

[zeropointbug]

The circuit lies between the negative batt and negative load&charge, both the batt + and load + are connected to the same contact point.

[rawfuls]

Ah, but my real question is where are the polarities, and such?

Is the far left both positive and the right is the ground?

[simplechamp]

The top part of the diagram is your battery, the bottom part is the wires going to your charger circuit. B+ is battery positive, and so on.

[rawfuls]

Okay, so the B+ is battery positive, B-, battery negative, P+/- is...

yeah, I'm dumb.

[simplechamp]

The wires going to the charger circuit.