ELECTRICITY LEAKAGE DETECTION DEVICE AND VEHICLE POWER SUPPLY SYSTEM

Title:

ELECTRICITY LEAKAGE DETECTION DEVICE AND VEHICLE POWER SUPPLY SYSTEM

Document Type and Number:

WIPO Patent Application WO/2021/199490

Kind Code:

A1

Abstract:

In this electricity leakage detection device (10) for detecting the electricity leakage of a high-voltage part where a power storage unit (20) and load are connected by a power supply line in a state where the high-voltage part is insulated from earth, a Y capacitor (CY) is connected between earth and the current path between the power storage unit (20) and load. A drive unit (11) of the electricity leakage detection device (10) charges or discharges the Y capacitor (CY) by outputting a square wave voltage to the current path between the power storage unit (20) and load via a driving coupling capacitor (Cd1). An electricity leakage detection unit (12) determines whether there is any electricity leakage between the current path and earth according to the process by which the voltage of a measurement point on the current path that has changed according to the charging or discharging of the Y capacitor (CY) converges on the original voltage.

More Like This:

JPH04323569	ROD FOR DIAGNOSING HOT LINE
JPS5376082	INSULATION RESISTANCE MEASURING APPARATUS
WO/2021/156608	MEASURING LOOP RESISTANCE

Inventors:

NAKAGAWA YOUSUKE

Application Number:

PCT/JP2020/043109

Publication Date:

October 07, 2021

Filing Date:

November 19, 2020

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SANYO ELECTRIC CO (JP)

International Classes:

G01R27/18; B60L3/00; B60L50/60; B60L58/10; G01R31/52

Domestic Patent References:

WO2007089037A1	2007-08-09
WO2019176173A1	2019-09-19
WO2007026514A1	2007-03-08
WO2020170556A1	2020-08-27

Foreign References:

JP2010249766A	2010-11-04
JP2012168070A	2012-09-06
JPH0870503A	1996-03-12

Other References: