US 2018/0323711 A1 · IN-VEHICLE POWER SUPPLY DEVICE AND VEHICLE MOUNTED WITH SAME

Abstract

A power supply device includes a boost convertor configured to perform a boost-up operation to boost a voltage supplied from an input terminal, a connection-assist diode connected in parallel to the boost convertor between the input terminal and an output terminal, and a switching element connected in parallel to the boost convertor and the connection-assist diode between the input terminal and the output terminal. A controller instructs the switching element to open and instructs the boost convertor to perform a boost-up operation for boosting the voltage at the input terminal during a boost-up period. The controller instructs the boost convertor to stop the boost-up operation when the boost-up period elapses. The controller then instructs the switching element to close the switching element. The controller then determines a state of the switching element based on a voltage at the output terminal detected. The in-vehicle power supply device can stably and accurately determine whether the switching element operates normally or not.

Claims14

Dependent claims

1-11. (canceled)

An in-vehicle power supply device comprising:

an input terminal;
an output terminal configured to be connected a load;
a power supply circuit including
a boost convertor connected to the input terminal and the output terminal, the boost convertor being configured to perform a boost-up operation in which the boost convertor boosts a voltage supplied from the input terminal and outputs the boosted voltage from the output terminal,
a connection-assist diode connected to the input terminal and the output terminal, and in parallel to the boost convertor, and
a switching element connected to the input terminal and the output terminal, and in parallel to the boost convertor and the connection-assist diode;
and
a controller configured to detect a voltage at the output terminal and control the boost convertor and the switching element,
wherein the controller is configured to:
perform a first determination mode in which the controller determines a power consumption state of the load;
and
perform a second determination mode in which the controller determines a state of the switching element based on a determination result of the first determination mode.

9 more elements

A vehicle comprising:

a vehicle body;
a storage battery installed to the vehicle body;
an operation switch installed to the vehicle body;
a warning device installed to the vehicle body;
a load installed to the vehicle body;
and
an in-vehicle power supply device including:
an input terminal connected to the storage battery;
an output terminal connected to the load;
a power supply circuit including
a boost convertor connected to the input terminal and the output terminal and configured to perform a boost-up operation in which the boost converter boosts a voltage supplied from the input terminal and output the boosted voltage from the output terminal,
a connection-assist diode connected to the input terminal and the output terminal, and in parallel to the boost convertor;
and
a switching element connected to the input terminal and the output terminal, and in parallel to the boost convertor and the connection-assist diode;
and
a controller configured to detect a voltage at the output terminal and control the boost convertor and the switching element,
wherein the controller is configured to:
perform a first determination mode in which the controller determines a power consumption state of the load in response to switching of the operation switch;
perform a second determination mode in which the controller determines a state of the switching element based on a determination result of the first determination mode;
and
send an alarm signal to the warning device when the controller determines that the switching element is in an abnormal state in the second determination mode.

18 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/038,455Filed 18 Jul 2018

Priority

JP 2014-1611127 Aug 2014

Published

8 Nov 2018

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

H02M 3/156
Using semiconductor devices only: with automatic control of output voltage or current, e.g. switching regulators
B60Q 9/00
Arrangement or adaptation of signal devices not provided for in one of
B60R 16/02
Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits…:…
B60R 16/03
Electric constitutive elements: for supply of electrical power to vehicle subsystems or for

In-vehicle power supply device and vehicle mounted with same

Life of this patent

In-vehicle power supply device and vehicle mounted with same

Life of this patent

Abstract

Claims14