US 10,118,575 B2Granted

In-vehicle power supply device and vehicle having in-vehicle power supply device mounted therein

AssigneePanasonic Intellectual Property Management Co., Ltd.

InventorsYasutaka Tanigawa, Shinichi Yamanouchi

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Abstract

An in-vehicle power supply device includes a boost converter configured to perform a boosting operation to boost a voltage supplied from an input terminal; a connection-assist diode connected in parallel to the boost converter; and a switch element connected in parallel to the boost converter and the connection-assist diode. A controller detects a voltage output from an output terminal as a first voltage while instructing the switch element to open and instructing the boost converter to stop an operation of the boost converter. After detecting the first voltage of the output terminal, the controller detects a voltage output from the output terminal as a second voltage while instructing the switch element to continuously open and instructing the boost converter to perform the boosting operation. Based on the difference between the first and second voltages, the controller judges whether the boost converter is normal or abnormal.

Claims5

Dependent claims

An in-vehicle power supply device comprising:

an input terminal;
an output terminal;
a power supply circuit unit including:
a boost converter connected between the input terminal and the output terminal, and configured to perform a boosting operation to boost a voltage supplied from the input terminal, and output the boosted voltage through the output terminal,
a connection-assist diode connected in parallel to the boost converter between the input terminal and the output terminal, and
a switch element connected in parallel to the boost converter and the connection-assist diode between the input terminal and the output terminal;
and
a controller configured to control the boost converter and the switch element,
wherein the controller is configured:
to detect a voltage output from the output terminal as a first voltage while instructing the switch element to open and instructing the boost converter to stop an operation of the boost converter;
to, after detecting the first voltage of the output terminal, detect a voltage output from the output terminal as a second voltage while instructing the switch element to continuously open and instructing the boost converter to perform the boosting operation;
and
to judge, based on a difference between the second voltage and the first voltage, whether the boost converter is in a normal state in which the boost converter can boost up the voltage to a predetermined value, or in an abnormal state in which the boost converter cannot boost up the voltage to the predetermined value.

10 more elements

A vehicle comprising:

a vehicle body;
an engine provided in the vehicle body;
a secondary battery provided in the vehicle body;
a vehicle starter switch provided in the vehicle body;
a door provided in the vehicle body;
a door lock device provided in the door;
an in-vehicle power supply device including:
an input terminal connected to the secondary battery,
an output terminal,
a boost converter connected between the input terminal and the output terminal, and configured to perform a boosting operation to boost a voltage supplied from the input terminal, and output the boosted voltage through the output terminal,
a connection-assist diode connected in parallel to the boost converter between the input terminal and the output terminal, and
a switch element connected in parallel to the boost converter and the connection-assist diode between the input terminal and the output terminal;
and
a warning device provided in the vehicle body,
wherein the controller is configured:
to, upon detecting that the vehicle starter switch is turned off and the door lock device is switched to an unlocked state, detect a voltage output from the output terminal as a first voltage while instructing the switch element to open and instructing the boost converter to stop an operation of the boost converter;
to, after detecting the voltage from the output terminal, detect a voltage output from the output terminal as a second voltage while instructing the switch element to continuously open and instructing the boost converter to perform the boosting operation;
to judge, based on a difference between the second voltage and the first voltage, whether the boost converter is in a normal state in which the boost converter can boost up the voltage to a predetermined value, or in an abnormal state in which the boost converter cannot boost up the voltage to the predetermined value;
to transmit a warning signal to the warning device upon judging that the boost converter is in the abnormal state;
and
not to transmit the warning signal to the warning device upon judging that the boost converter is in the normal state.

18 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/518,669Filed 24 Sep 2015
Priority: JP 2014-23031413 Nov 2014
Published: US 2017/0225636 A110 Aug 2017
Granted: 6 Nov 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

B60R 16/033
For supply of electrical power to vehicle subsystems or for: characterised by the use of electrical cells or batteries
B60L 1/00
Supplying electric power to auxiliary equipment of vehicles
B60L 3/003
Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train: relating to inverters
B60L 3/12
Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy…:…

Family

US 2017/0225636 A1Pre-grant publication · published 10 Aug 2017
US 10,118,575 B2This patent

From the US filing history. Foreign family members aren’t listed.

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