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circuit inside nokia battery

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grittinjames

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nokia battery circuit

hai

i opened a nokia battery recently. i found a circuit wired up with an ic

wt it for any idea?
 

wolly

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inside nokia batteries

most battery packs whith chip inside are used for monitoring temprature,voltage,charge etc to make it 'smart'.
just search datasheet of the chip and you will have a better idea why its being used for.
 

kender

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At a minimum, it's a circuit that protects the Lithium cell from overheat, overvotage and overcurrent. It also (more importantly) protects the battery manufacturer from law suits. Here's a thread, where such protection circuits were discussed:
 

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