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High-voltage interlocking loop and fault detection method thereof

A high-voltage interlock loop, fault detection technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of wasting manpower and material resources, low detection efficiency, etc., to improve the efficiency of troubleshooting and reduce the complexity of technology updates. Effect

Inactive Publication Date: 2018-11-02
SAIC MOTOR
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  • Claims
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Problems solved by technology

[0004] However, in the prior art, when a fault occurs in the high-voltage interlock circuit, the usual detection method is to check each section of line and each high-voltage component, resulting in low detection efficiency and waste of manpower and material resources

Method used

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  • High-voltage interlocking loop and fault detection method thereof
  • High-voltage interlocking loop and fault detection method thereof
  • High-voltage interlocking loop and fault detection method thereof

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Embodiment Construction

[0023] As mentioned earlier, in the existing technology of electric vehicles, when a fault occurs in the high-voltage interlock circuit, it is impossible to accurately determine the location of the fault point, and each line and each component has to be checked one by one, resulting in low detection efficiency , and waste manpower and material resources.

[0024] The inventors of the present invention have found through research that the key to the above problem is that, in the prior art, the detection method used for the failure of the high-voltage interlock circuit cannot obtain information related to distance and location. Specifically, the existing detection method usually sends an interlock signal through the interlock signal transmitter, such as a pulse width modulation (Pulse Width Modulation, PWM) signal, a continuous level signal or a single pulse signal, if the high voltage interlock circuit is In the normal channel state, the signal received by the interlock signal ...

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Abstract

The invention discloses a high-voltage interlocking loop and a fault detection method thereof. The high-voltage interlocking loop comprises an interlocking signal transmitting end, an interlocking signal receiving end and a plurality of connection ports, wherein the interlocking signal transmitting end is suitable for transmitting an interlocking signal; the plurality of connection ports are connected in series between the interlocking signal transmitting end and the interlocking signal receiving end; at least one connection port among the plurality of connection ports is connected in parallelwith a warning device, and when a high-voltage component adapted to the connection port is disconnected, the warning device in parallel connection with the connection port sends out an alarm in response to the interlock signal. By adopting the high-voltage interlocking loop, whether a high-voltage interlocking loop fault occurs can be effectively detected, and a position of a fault point in the high-voltage interlocking loop can be determined, thereby effectively improving the troubleshooting efficiency.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a high-voltage interlock circuit and a fault detection method thereof. Background technique [0002] With the rapid development of the new energy automobile industry, the voltage and energy of automobile batteries are increasing, ranging from tens of volts to hundreds of volts, which are much higher than the safe voltage of 30 volts DC and 60 volts AC stipulated by the national standard. The high voltage interlock circuit (High Voltage Interlock Loop, HVIL) is essential to ensure the safety of maintenance due to electric shock hazard caused by misoperation. [0003] The high-voltage interlock circuit is used to confirm the integrity of the entire high-voltage system, so as to initiate safety measures when the high-voltage system circuit is disconnected or the integrity is damaged. Specifically, a high-voltage interlock circuit usually includes an interlock signal sendi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02
CPCG01R31/50
Inventor 陆珂伟徐辰傅杰文汪国康
Owner SAIC MOTOR
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