Title:
SYSTEM FOR FAILURE DIAGNOSIS OF INSULATION DETECTION FUNCTION OF ELECTRIC VEHICLE, METHOD, AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/221595
Kind Code:
A1
Abstract:
A system for failure diagnosis of an insulation detection function of an electric vehicle, a diagnostic device, and a charging pile. The system comprises a diagnostic device and a server which are communicationally connected. The diagnostic device comprises a direct current bus, N measurement resistor groups, and a device ground. The N measurement resistor groups have one-to-one correspondence to N resistance intervals. Positive electrode measurement resistors are respectively connected to a positive electrode end of the direct-current bus and the device ground by means of a first switch, and negative electrode measurement resistors are respectively connected to a negative electrode end of the direct-current bus and the device ground by means of a second switch. The diagnostic system can determine whether the measurement of external resistance by an electric vehicle is accurate, thereby determining whether the insulation detection function is normal or failed. Since the N measurement resistor groups have one-to-one correspondence to the N resistance intervals, during a plurality of diagnoses, the diagnostic system can detect the accuracy of the measurement of the resistance in the resistance intervals by the electric vehicle, thereby making a diagnostic result more accurate.
Inventors:
SHEN XIAOJIE (CN)
LIAO ZENGCHENG (CN)
LIAO ZENGCHENG (CN)
Application Number:
PCT/CN2023/078382
Publication Date:
November 23, 2023
Filing Date:
February 27, 2023
Export Citation:
Assignee:
AUTEL DIGITAL POWER CO LTD (CN)
International Classes:
G01R35/00; G01R27/02; G01R31/12
Foreign References:
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| KR20130059107A | 2013-06-05 | |||
| KR20180051948A | 2018-05-17 |
Attorney, Agent or Firm:
AFD CHINA INTELLECTUAL PROPERTY LAW OFFICE (CN)
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