Patent ID: 11894702
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC H

Claim 5:
6. An energy transfer circuit comprising:
an energy holding circuit including:
an inductor; and
four clamp switches that are fully bridge-connected;

a cell selection circuit provided between the energy holding circuit and n cells connected in series, where n is an integer of two or more, the cell selection circuit being configured to electrically connecting both ends of any cell of the n cells to both ends of the energy holding circuit;
and
a controller configured to cause the cell selection circuit and the four clamp switches, wherein:
the four clamp switches form a closed loop including the inductor in a state where the cell selection circuit does not select any cell,
the cell selection circuit includes:
a first wiring connected to one end of the energy holding circuit,
a second wiring connected to another end of the energy holding circuit,
(n+1) first wiring side switches each connected between the first wiring and a corresponding one of nodes of the n cells connected in series, and
(n+1) second wiring side switches each connected between the second wiring and a corresponding one of nodes of the n cells connected in series,

among the four clamp switches, a first arm having a first clamp switch and a second clamp switch connected in series and a second arm having a third clamp switch and a fourth clamp switch connected in series are connected in parallel between the first wiring and the second wiring, and
the inductor is connected between a node between the first clamp switch and the second clamp switch and a node between the third clamp switch and the fourth clamp switch.