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Patient 1
THE ANALYSIS OF THE CHARGEABLE BATTERY PACK SHOWED THAT THE HOUSING WAS CRACKED AND TAPED TOGETHER AGAIN. ALSO A SMALL GRAFTER OF THE HOUSING WAS MISSING. THE ONLY EXPLANATION FOR THIS CONDITION IS THAT THE BATTERY PACK HAS BEEN DROPPED (WHICH CAUSED THE CRACK) AND PUT TOGETHER AGAIN ON THE USERS SITE. SEPARATING THE 2 HOUSING PARTS SHOWED THAT AN ISOLATING FOIL WAS DISPLACED. THEREFORE A CONDUCTOR WHICH IS NORMALLY COMPLETELY ISOLATED AND RUNS ACROSS SEVERAL SINGLE CELLS HAD NOW CONTACT TO THIS CELLS WHICH CAUSED A DIRECT SHORT-CIRCUIT. IN CONSEQUENCE THE CONDUCTOR WAS OVERLOADED AT THIS POINTS, GOT HOT AND STARTED TO MELT. THIS WAS ENOUGH HEAT THAT THE HOUSING WAS ALSO MELTING. ROOT CAUSE FOR THE DISLOCATION OF THE ISOLATION FOIL WAS, THAT THE PERSON WHO PUT THE 2 HOUSING PARTS BACK TOGETHER AFTER THE DROP PUSHED THE ISOLATION FOIL BY MISTAKE DEEPER INTO THE HOUSING. BY CLOSING AND TAPING THE 2 HOUSINGS THE ISOLATION FOIL HAS BEEN PRESSED DEEPER AND DEEPER INSIDE THE BATTERY PACK AND THE CONDUCTOR HAS BEEN PRESSED ON THE CONTACTS OF THE SINGLE BATTERY CELLS. THE USER INSTRUCTION CONTAINS A CLEAR NOTE WHICH STATES THAT THE BATTERY PACK: * MUST NOT BE MODIFIED OR DISASSEMBLED * MUST NOT BE DROPPED OR GET SHOCKS.