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PaxInstruments / t400-electronics

Electronics for the Pax Instruments T400 temperature datalogger
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Does the BL-5C have internal protection? #46

Closed charlespax closed 9 years ago

charlespax commented 10 years ago

See https://github.com/PaxInstruments/t400-electronics/issues/41#issuecomment-54092325

Tsillen commented 10 years ago

this website shows that it has a protection pcb inside. http://9600n81.blogspot.nl/2013/06/whats-inside-nokia-bl-5cx-battery.

The provided datasheet does not say anything about a protection pcb.

charlespax commented 10 years ago

Sweet, it does look like there is protection. The fuse can be removed. It may still be good to leave in there in the event of failure or someone doing something crazy.

Working link: http://9600n81.blogspot.com/2013/06/whats-inside-nokia-bl-5cx-battery.html

"Armed with Google and a lot of patience, I found that the leftmost IC, marked 2450B, contains a pair of MOSFET transistors, while the center IC, marked M5A581, is designed with a few goals in mind, namely: avoiding overcharge, short circuit and overdischarge situations, that might endanger the cell."