1. Field of the Invention
The present disclosure relates to battery protection integrated circuits, battery protection apparatuses and battery packs.
2. Description of the Related Art
Conventionally, an apparatus for protecting a secondary battery is known, in which a charge/discharge control switch, disposed between a negative electrode of the secondary battery and a negative terminal coupled to ground of a load, is turned off to protect the secondary battery (e.g., Patent Document 1). The apparatus includes an external signal detection circuit for detecting an external signal for turning on/off the charge/discharge control switch on the basis of a ground potential of the secondary battery.
However, a signal detection circuit in the conventional technology that detects the signal on the basis of the ground potential of the secondary battery may erroneously detect a control signal generated on the basis of a potential of the negative terminal coupled to the ground of the load due to a potential difference between the ground side potential of the load and the ground potential of the secondary battery.