Battery temperature problem
Posted: Thu Feb 28, 2019 6:30 pm
I've got a problem with battery temperature and many times my phone isn't charging (temperature below 5 Celsius degrees). Temperature is jumping randomly from -20 to +7 degree, most often not charging range. Then I dissmantle the phone unhook the battery and give some touch to the battery connector and temperature returns to correct value. The battery connector has 6 solder points connected in pairs (I measured resistance between them at is around 1 Ohm), so two for power plus, two for power minus and two in center for temperature I think. The device behave like have a "cold solder" in temperature joints only because it doesn't restart. So last time I dissasembly the phone I took a soldering iron and resolder one of center joints (to second center joint I have too big tip in soldering iron)
and for two days the temperature was ideal, but today morning it drops down to 2 Celsius and a moment later rise to 7-10 degrees. After few hours it recovers to normal temperature again (this jump was for no reason, I'm not using phone at this time)
Of course if it is wrong today it can broke every moment, so I want to repair it to end. Is my idea that it is a cold solder is correct? What else I can do to repair the battery temperature, maybe I should resolder other joints?
- battery.jpg (199.82 KiB) Viewed 3192 times
and for two days the temperature was ideal, but today morning it drops down to 2 Celsius and a moment later rise to 7-10 degrees. After few hours it recovers to normal temperature again (this jump was for no reason, I'm not using phone at this time)
- Screenshot.png (73.23 KiB) Viewed 3192 times
Of course if it is wrong today it can broke every moment, so I want to repair it to end. Is my idea that it is a cold solder is correct? What else I can do to repair the battery temperature, maybe I should resolder other joints?
