BIDIRECTIONAL ON-BOARD CHARGER INSULATION RESISTANCE MEASUREMENT CIRCUIT AND METHOD

WIPO Patent Application WO/2022/241648

A1

Embodiments of the present application disclose a bidirectional on-board charger insulation resistance measurement circuit and method. The circuit comprises: a first resistor, a second resistor, a third resistor, a fourth resistor, a first switch, a second switch, a first voltmeter, a second voltmeter, and a processing unit, wherein the first resistor is connected in series to the second resistor; the end of the second resistor away from the first resistor is connected to one end of the first switch, and the other end of the first switch is grounded; the third resistor is connected in series to the fourth resistor; the end of the fourth resistor away from the third resistor is connected to one end of the second switch, and the other end of the second switch is grounded; and the processing unit is configured to control the state of the first switch and the second switch, and to calculate the insulation resistance of a first end and a second end of a bidirectional on-board charger according to voltage values of the first voltmeter and the second voltmeter. According to the embodiments of the present application, the insulation resistance can be measured in real time.

LI YONG (CN)
ZHAO DEQI (CN)
WU RENHUA (CN)

PCT/CN2021/094409

November 24, 2022

May 18, 2021

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SHINRY TECH CO LTD (CN)

G01R27/02

CN106841804A	2017-06-13
CN104360167A	2015-02-18
CN104378068A	2015-02-25
CN208239521U	2018-12-14
JP2001286053A	2001-10-12

SCIHEAD IP LAW FIRM (CN)

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