Patent ID: 9263878
Filing Date: 2016-02-16
CPC Classification: B60L,G01R,H01L,H01M,H02H,Y02E,Y02T

Claim Text:
1. A circuit protector for protecting a monitoring circuit that monitors a voltage of a power supply unit comprising: a plurality of detection lines for voltage detection that connect between the power supply unit and the monitoring circuit; an overvoltage protection element connected between the detection lines that keeps the voltage applied to the monitoring circuit at a fixed voltage; and a circuit protection element disposed in each detection line that disconnects an electrical link between the monitoring circuit and the power supply unit when a current beyond a predetermined current value flows into the detection line; wherein: the overvoltage protection element is constituted so that conduction between each detection line is maintained in a short circuit state when an excess voltage occurs in the power supply unit; the circuit protection element is constituted so that the electrical link between the power supply unit and the monitoring circuit is intercepted by a short-circuit current that flows between the detection lines via the overvoltage protection element when the excess voltage occurs in the power supply unit; the overvoltage protection element connected between the detection lines short-circuit-faults when the excess voltage is applied thereto; the overvoltage protection element is configured so that between each detection line is maintained in a short circuit state by a short-circuit-fault when the excess voltage occurs in the power supply unit; the circuit protection element is provided with an IC chip and a lead frame; and the lead frame is directly connected to both an anode and a cathode of the IC chip.