VEHICLE POWER SUPPLY DEVICE AND CONTROL METHOD THEREFOR

Title:

VEHICLE POWER SUPPLY DEVICE AND CONTROL METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2020/255691

Kind Code:

A1

Abstract:

A power supply device equipped with a low-voltage battery (1), a high-voltage battery (2), a starter-generator (6), a DC-DC converter (7), a changeover switch (40), and a controller (20). The DC-DC converter is provided on an electric circuit connecting the low-voltage battery and the high-voltage battery. The changeover switch switches a connection between the starter-generator and the first battery and the second battery. When the DC-DC converter is normal the controller controls the changeover switch to connect the starter-generator and either the low-voltage battery or the high-voltage battery and connect the other battery, that is, the high-voltage battery or the low-voltage battery, to the starter-generator via the DC-DC converter, and when the DC-DC converter is abnormal or malfunctioning, the controller controls the changeover switch to connect the starter-generator and the other battery without using the DC-DC converter and controls the output of the starter-generator in accordance with the connected other battery.

Inventors:

NISHIHIRO YOSHIMASA (JP)
TAHARA MASAHIKO (JP)
MOCHIZUKI MASAHARU (JP)
HIRANO TAKUROU (JP)

Application Number:

PCT/JP2020/021631

Publication Date:

December 24, 2020

Filing Date:

June 01, 2020

Export Citation:

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Assignee:

JATCO LTD (JP)
NISSAN MOTOR (JP)
RENAULT SAS (FR)

International Classes:

F16H59/50; B60K6/28; B60K6/40; B60K6/442; B60K6/485; B60K6/543; B60L3/00; B60L50/16; B60L50/60; B60W10/00; B60W10/08; B60W20/50; F16H63/40; H02J7/00; H02J7/14

Foreign References:

JP2009179311A	2009-08-13
JP2012121570A	2012-06-28
US20110095603A1	2011-04-28
JP2014202135A	2014-10-27
JP2017099234A	2017-06-01
JP2013095246A	2013-05-20
JP2019115815A	2019-07-18

Other References: