Title:
CURRENT DETECTION CIRCUIT, CURRENT LEAKAGE DETECTION METHOD, AND CHARGING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/105663
Kind Code:
A1
Abstract:
A current detection circuit (20), a current leakage detection method, and a charging system. The current detection circuit (20) is capable of outputting an excitation signal to a first winding (u1) in a magnetic induction coil (10), then determining, on the basis of a feedback signal and a reference signal detected by the first winding (u1), whether a leakage current is present in a first lead (L0) running through the magnetic induction coil (10), thus determining whether an electrical leakage is found while a charging device (101) is supplying electricity to the external environment, and providing the determination result to a control circuit (103). When an electrical leakage is found, the control circuit (103) is capable of cutting off in a timely manner a circuit by which the charging device (101) is supplying electricity to the external environment so that the charging device (101) is stopped from supplying electricity to the external environment, thus reducing the occurrence of hazards, and increasing the safety and reliability of a charging process; at the same time, also increasing the reaction speed with respect to the control of the charging process and increasing the degree of timeliness. In addition, the range of applications of the current detection circuit (20) is not restricted by the geography and climate, thus greatly broadening the range of applications of the current detection circuit (20).
Inventors:
WANG CHAO (CN)
Application Number:
PCT/CN2021/129979
Publication Date:
May 27, 2022
Filing Date:
November 11, 2021
Export Citation:
Assignee:
CHANGCHUN JETTY AUTOMOTIVE PARTS CORP (CN)
International Classes:
G01R31/52; G01R19/00; H02J7/00
Foreign References:
| CN112269148A | 2021-01-26 | |||
| CN107534286A | 2018-01-02 | |||
| US5223789A | 1993-06-29 | |||
| CN107703823A | 2018-02-16 | |||
| JP2012233718A | 2012-11-29 | |||
| CN203811737U | 2014-09-03 | |||
| CN104215817A | 2014-12-17 | |||
| JP2016031253A | 2016-03-07 | |||
| JP2016206054A | 2016-12-08 | |||
| CN202011289085A | 2020-11-17 |
Attorney, Agent or Firm:
BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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