Android Hardware Battery temperature, where is the sensor?

I have a stupid idea. With android is simple to get battery state (volt, charge, temperature, ecc).

I think that the sensor is located inside lithium battery pack, in fact there are 3 pins over it connecting to the phone. Maybe that one of them is the battery sensor temperature. How it works? It's possible, but i know that damage may be relevant, isolate that pin and connect the phone pin to an external sensor?

So we can catch outside temperature using battery manager....without using Google IOIO or Arduino just for reading a temperature.

THAT'S ONLY FOR STUDY INFORMATION! PLEASE DON'T TALK ABOUT DANGER OF LITHIUM BATTERIES...

Thanx a lot!

Solution

In theory, yes, but the battery temperature is critical in the charge/discharge cycle of the phone. Phone batteries charge by applying a constant current to the battery. When the phone is charging the battery temp will rise (a byproduct of mixing electricity with chemicals). If it rises too far, the battery will fail (and could [in theory at least] explode).

Thus the phone's charging circuitry needs to monitor the battery temp so if it rises beyond a given threshold it backs the charging current off until the temperature stablises, ensuring the battery remains within safe limits.

In other words -- if you do override it, do so at your own risk.