# US 11,114,888 B2 · Power supply device

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- Number: US 11,114,888 B2
- Document ID: US11114888B2
- Status: Granted
- Kind: B2
- Application number: 16/986,213
- Filed: 2020-08-05
- Published: 2021-02-18
- Granted: 2021-09-07
- Earliest claimed: 2019-08-13
- Assignees: Yazaki Corporation
- Applicants: Yazaki Corporation
- Inventors: Shuuji Satake; Yoshihito Aoki; Hiroo Yabe; Tsutomu Saigo
- Web page: https://patentgrep.com/patent/US11114888B2

## CPC

- H02H 7/268: {for DC systems}
- H02J 9/06: with automatic change-over {, e.g. UPS systems}
- B60R 16/03: for supply of electrical power to vehicle subsystems {or for (circuit arrangements for charging batteries H02J7/00)}
- H02J 1/08: Three-wire DC power distribution systems; Systems having more than three wires
- H02J 1/102: being switching converters (H02J1/108, H02J1/12 take precedence)
- H02J 1/106: {for load balancing, symmetrisation, or sharing}
- H02J 7/34: Parallel operation in networks using both storage and other DC sources, e.g. providing buffering (H02J7/14 takes precedence)
- H02M 3/145: using devices of a triode or transistor type requiring continuous application of a control signal
- H02H 3/05: with means for increasing reliability, e.g. redundancy arrangements {(for logic circuits H03K19/003)}
- H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H)
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P)

## Abstract

A power supply device includes a main power supply, a sub-power supply, a main power supply path, a sub-power supply path, a power supply selector switch, and a load selector switch group. The main power supply path is connected to the main power supply. The sub-power supply path is different from the main power supply path and is connected to the sub-power supply. The load selector switch group is disposed between the main power supply path and the sub-power supply path, and the load unit, and performs switching so as to connect one of the main power supply path and the sub-power supply path to the load unit and to disconnect the other from the load unit, according to switching of the power supply selector switch.

## Claims

### Claim 1

A power supply device comprising:
a main power supply that supplies power to a load unit;
a sub-power supply that is a power supply different from the main power supply and supplies power to the load unit;
a main power supply path that is connected to the main power supply;
a sub-power supply path that is a power supply path different from the main power supply path and is connected to the sub-power supply;
a power supply selector that is switched between a first state where power can be supplied from the main power supply via the main power supply path to the load unit and a second state where power can be supplied from the sub-power supply via the sub-power supply path to the load unit; and
a load supply path selector that is disposed between the main power supply path and the sub-power supply path, and the load unit, and performs switching so as to connect one of the main power supply path and the sub-power supply path to the load unit and disconnect the other of the main power supply path and the sub-power supply path from the load unit according to switching of the power supply selector, wherein
the load supply path selector includes a main terminal connected to the main power supply path, a sub-terminal connected to the sub-power supply path, and one load terminal connected to the load unit, and the one load terminal is connected to one of the main terminal and the sub-terminal and the one load terminal is not connected to the other of the main terminal and the sub-terminal.

### Claim 2 (depends on 1)

The power supply device according to claim 1, wherein
when the main power supply path is normal, the power supply selector is switched to the first state, and the load supply path selector performs switching so as to connect the main power supply path to the load unit and disconnect the sub-power supply path from the load unit, and
when the main power supply path is abnormal, the power supply selector is switched to the second state, and the load supply path selector performs switching so as to connect the sub-power supply path to the load unit and disconnect the main power supply path from the load unit.

### Claim 3 (depends on 1)

The power supply device according to claim 1, wherein
the power supply selector is configured to include a DC/DC converter that transforms a voltage of DC power, and
the DC/DC converter transforms a voltage of power supplied from the main power supply and supplies a transformed voltage to the sub-power supply.

### Claim 4 (depends on 2)

The power supply device according to claim 2, wherein
the power supply selector is configured to include a DC/DC converter that transforms a voltage of DC power, and
the DC/DC converter transforms a voltage of power supplied from the main power supply and supplies a transformed voltage to the sub-power supply.