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Got a new donation today. A current shunt from an S80 battery.Has 8 connections and three ICs :

IC1 : THM-A-1500 : No info to be found
IC2 : LM2903 comparator
IC3 : STM8AF6266TC MCU

Testing soon:)
 

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Can you tell if the sense resistor element is just copper that has been laser trimmed, or as some (JR) have suggested, a piece of alloy that has been welded into position?

Could U1 be an isolation chip, such as the Si8642 used on the cell monitoring boards?
 
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