BATTERY PROTECTING CIRCUIT, BATTERY PROTECTING DEVICE, AND BATTERY PACK

摘要

A disclosed battery protecting circuit for protecting a secondary battery including at least first and second cells connected in series includes a first terminal connected on a high potential side of the first cell; a second terminal connected on a low potential side of the first cell and a high potential side of the second cell; a third terminal connected on a low potential side of the second cell; a charge abnormality detecting circuit detecting abnormality of the charged state of the secondary battery; a shifting circuit shifting electric potential of the second terminal on a side of the first terminal or a third terminal when a disconnection occurs between the secondary battery and the second terminal; a disconnection detecting circuit detecting the disconnection based on the electric potential of the second terminal; and a latching circuit retaining a result detected by the disconnection detecting circuit.