Battery stack balancing apparatus
First Claim
1. A battery stack balancing apparatus for balancing a battery stack comprising a plurality of battery modules connected to each other in series, the apparatus comprising:
- a series resonant circuit comprising a first capacitor and a first inductor connected to the first capacitor in series;
a polarity change circuit comprising a second inductor and a polarity change switch connected to the second inductor in series so as to be selectively turned on or off, wherein an entirety of the polarity change circuit is connected to the first capacitor in parallel;
a plurality of transmission lines, each transmission line having a first end electrically connected to one of a plurality of nodes, including a first transmission line electrically connected to a first node at a low-potential end of the battery stack, a second transmission line electrically connected to a second node at a high-potential end of the battery stack, and at least a third transmission line electrically connected between the plurality of battery modules connected to each other in series, and each transmission line having a second end connected to the series resonant circuit;
a plurality of transmission switches, including a first transmission switch provided on the first transmission line, a second transmission switch provided on the second transmission line, and a third transmission switch provided on the third transmission line, wherein each transmission switch is configured to be selectively turned on or off; and
a control unit configured to;
control the plurality of transmission switches and the polarity change switch, andcontrol the polarity change circuit and each of the transmission switches to perform cell balancing of the plurality of battery modules.
2 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is a balancing apparatus capable of performing balancing without wasting power and of rapidly transmitting power. A battery stack balancing apparatus for balancing a battery stack including a plurality of battery modules connected to each other in series includes a series resonant circuit including a first capacitor and a first inductor connected to the first capacitor in series, a polarity change circuit including a second inductor and a polarity change switch connected to the second inductor in series so as to be selectively turned on or off, and connected to the first capacitor in parallel, a plurality of transmission lines having ends, respectively, electrically connected to a plurality of nodes provided at a low-potential end of the battery stack, at a high-potential end of the battery stack, and between the plurality of battery modules connected to each other in series, and other ends connected to the series resonant circuit, a plurality of transmission switches provided on the plurality of transmission lines so as to be selectively turned on or off, and a control unit configured to control the plurality of transmission switches and the polarity change switch.
14 Citations
19 Claims
-
1. A battery stack balancing apparatus for balancing a battery stack comprising a plurality of battery modules connected to each other in series, the apparatus comprising:
-
a series resonant circuit comprising a first capacitor and a first inductor connected to the first capacitor in series; a polarity change circuit comprising a second inductor and a polarity change switch connected to the second inductor in series so as to be selectively turned on or off, wherein an entirety of the polarity change circuit is connected to the first capacitor in parallel; a plurality of transmission lines, each transmission line having a first end electrically connected to one of a plurality of nodes, including a first transmission line electrically connected to a first node at a low-potential end of the battery stack, a second transmission line electrically connected to a second node at a high-potential end of the battery stack, and at least a third transmission line electrically connected between the plurality of battery modules connected to each other in series, and each transmission line having a second end connected to the series resonant circuit; a plurality of transmission switches, including a first transmission switch provided on the first transmission line, a second transmission switch provided on the second transmission line, and a third transmission switch provided on the third transmission line, wherein each transmission switch is configured to be selectively turned on or off; and a control unit configured to; control the plurality of transmission switches and the polarity change switch, and control the polarity change circuit and each of the transmission switches to perform cell balancing of the plurality of battery modules. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification