# US 2019/0356161 A1 · Power supply control device

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- Number: US 2019/0356161 A1
- Document ID: US20190356161A1
- Status: Published application
- Kind: A1
- Application number: 16/482,928
- Filed: 2018-01-25
- Published: 2019-11-21
- Earliest claimed: 2017-02-14
- Assignees: Autonetworks Technologies, Ltd.; Sumitomo Wiring Systems, Ltd.; Sumitomo Electric Industries, Ltd.
- Applicants: AutoNetworks Technologies, Ltd.; Sumitomo Wiring Systems, Ltd.; Sumitomo Electric Industries, Ltd.
- Inventors: Keisuke Wakazono; Katsuma Tsukamoto
- Web page: https://patentgrep.com/patent/US20190356161A1

## CPC

- H03K 17/122: {in field-effect transistor switches}
- H02J 7/663: {using battery or load disconnect circuits (H02J9/002 takes precedence)}
- H02J 7/68: using circuits for correcting or protecting against reverse-polarity
- H02J 7/92: with prioritisation of loads or sources
- H02J 9/061: {for DC powered loads}
- H03K 17/0822: {in field-effect transistor switches}
- H02J 7/855: {with circuits adapted for supplying loads from the battery}
- H02J 2105/30: the load networks being external to vehicles, i.e. exchanging power with vehicles
- H03K 17/687: the devices being field-effect transistors
- H03K 2217/0027: Measuring means of, e.g. currents through or voltages across the switch
- H03K 2217/0054: Gating switches, e.g. pass gates
- H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M)
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY

## Abstract

Provided is a power supply control device. The power supply control device includes a plurality of semiconductor switches that are connected in parallel between two power sources and control the supply of power to a load that is connected to the two power sources via the plurality of semiconductor switches, the power supply control device including a temperature detection unit that detects a rise of temperature due to heat that is produced from at least one of the plurality of semiconductor switches, and a switching control unit that executes control that switches the plurality of semiconductor switches from OFF to ON if the temperature detection unit detects a temperature that is at least a threshold temperature.

## Claims

### Claim 1

A power supply control device including a plurality of semiconductor switches that are connected in parallel between two power sources and controlling the supply of power to a load that is connected to the two power sources via the plurality of semiconductor switches, the power supply control device comprising:
a temperature detection unit that detects a rise of temperature due to heat that is produced from at least one of the plurality of semiconductor switches; and
a switching control unit that executes control that switches the plurality of semiconductor switches from OFF to ON if the temperature detection unit detects a temperature that is at least a threshold temperature.

### Claim 2 (depends on 1)

The power supply control device according to claim 1, further comprising:
a relay contact that is connected in parallel to the plurality of semiconductor switches, wherein
if the relay contact is OFF, the switching unit executes control that switches the relay contact from OFF to ON if the temperature detection unit detects a temperature that is at least the threshold temperature.

### Claim 3 (depends on 1)

The power supply control device according to claim 1, wherein:
the semiconductor switch is an FET,
one of the two power sources is connected to a drain of each of the semiconductor switches and the other of the two power sources is connected to a source of each of the semiconductor switches,
the power supply control device further comprises a reverse flow detection unit that detects a current that flows from the one power source to the drains of the semiconductor switches, and
if at least one of the plurality of semiconductor switches is ON, the switching control unit executes control that switches the at least one of the semiconductor switches to OFF if the reverse flow detection unit has detected the current.

### Claim 4 (depends on 2)

The power supply control device according to claim 2, wherein:
the semiconductor switch is an FET,
one of the two power sources is connected to a drain of each of the semiconductor switches and the other of the two power sources is connected to a source of each of the semiconductor switches,
the power supply control device further comprises a reverse flow detection unit that detects a current that flows from the one power source to the drains of the semiconductor switches, and
if at least one of the plurality of semiconductor switches is ON, the switching control unit executes control that switches the at least one of the semiconductor switches to OFF if the reverse flow detection unit has detected the current.