High-voltage connector and its detection circuit and detection method

Abstract

The invention relates to a high-voltage connector and a detection circuit and method thereof. The high-voltage connector comprises a socket assembly and a plug assembly. The plug assembly comprises a plug shell, a first interlocking plug, a second interlocking plug and high-voltage contact pins. The socket assembly comprises a socket shell, an interlocking static socket and high-voltage plug bushes. The high-voltage plug bushes are opposite to the high-voltage contact pins, and a high-voltage circuit is switched on when the high-voltage plug bushes and the high-voltage contact pins are connected in an inserted mode. The socket assembly further comprises a displacement sensor, an interlocking moving socket and a limiting spring. One end of the limiting spring is connected with the socket shell, and the other end of the limiting spring is connected with the interlocking moving socket in an insulated mode. The displacement sensor is electrically connected between the interlocking moving socket and the interlocking static socket and used for acquiring displacement of the interlocking moving socket. When the socket assembly and the plug assembly are connected in an inserted mode, the second interlocking plug is connected with the interlocking static socket in an inserted mode, the first interlocking plug is connected with the interlocking moving socket in an inserted mode, and a high-voltage interlocking circuit is switched on. The high-voltage connector and the detection circuit and method thereof improve the safety of the vehicle high-voltage circuit.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a high-voltage connector, a detection circuit and a detection method thereof. Background technique [0002] Electric vehicles have become one of the important development directions of automobiles. In the battery pack of electric vehicles, the high-voltage output of the entire battery pack can be turned on or off by operating the battery pack maintenance switch. [0003] When the battery pack is charging / discharging normally, the maintenance switch must be in the closed state. However, during the charging or discharging process of the battery pack (when there is current passing through the power bus of the battery pack), the maintenance switch is disconnected abnormally. The part of the vehicle that is close to the maintenance switch may catch fire, seriously affecting the safety of the vehicle. [0004] Specifically, for example, the Chinese invention patent applicat...

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Problems solved by technology

Another example is the utility model patent application number 201420436554.1, which discloses a battery pack high-voltage interlock circuit system. The high-voltage interlock circuit is composed of a battery management system, a maintenance switch, a charging connector and a total positive / negative connector connected in series. To solve the problem that the high-voltage interlocking circuit system of the battery pack is not perfect

[0005] The disadvantages of the above two schemes are: after determining the abnormality of the switch in the high-voltage interlock circuit through the signal of the controller, it is impossible to locate exactly which switch in the circuit is abnormal and what kind of abnormality it is

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