BATTERY CELL VOLTAGE EQUALIZATION CIRCUIT

摘要

A battery cell voltage equalization circuit 1 equalizes the voltages of battery cells B1 and B2 that are connected in series. A switch S1 is electrically connected to the positive electrode of the battery cell B1 via a first path, is electrically connected to the negative electrode of the battery cell B1 via a second path, and electrically connects or disconnects the first and second paths. A switch S2 is electrically connected to the positive electrode of the battery cell B2 via the second path, is electrically connected to the negative electrode of the battery cell B2 via a third path, and electrically connects or disconnects the second and third paths. An inductor L is provided in the second path. Fuses h1 through h3 are provided in the first through third paths, respectively. The switches S1 and S2 are controlled to an ON state alternately.

主权项

1. A battery cell voltage equalization circuit that equalizes voltages of a first rechargeable battery cell and a second rechargeable battery cell that are connected in series, comprising:
a first switch that is electrically connected to a positive electrode of the first battery cell via a first path, that is electrically connected to a negative electrode of the first battery cell via a second path and that electrically connects or disconnects the first path and the second path; a second switch that is electrically connected to a positive electrode of the second battery cell via the second path, that is electrically connected to a negative electrode of the second battery cell via a third path and that electrically connects or disconnects the second path and the third path; an inductor that is provided in the second path; and a fuse that is provided in at least one of the first through third paths.