High-voltage detection circuit and detection method thereof

Abstract

The invention provides a high-voltage detection circuit and a detection method thereof and belongs to the field of electric power technologies. The high-voltage detection circuit includes a current adjustment module, a first detection module and a processing module; the current adjustment module can be turned on or turned off so as to adjust current in a high-voltage circuit; the first detection module is used for providing detection signals and transmitting the detection signals to the processing module; and the processing module is used for determining whether a positive pole switch unit ora negative pole switch unit malfunctions according to the desired working state of the positive pole switch unit, the desired operating state of the negative pole switch unit, and the detection signals, wherein the positive pole switch unit includes a main positive switch, or includes a main positive switch and a main positive pre-charging switch, and the negative pole switch unit includes a mainnegative switch, or includes a main negative switch and a main negative pre-charging switch. With the high-voltage detection circuit and the detection method thereof provided by the technical schemesof the invention adopted, the speed of the detection of the faults of the high-voltage circuit can be improved, and the safety risk of the high-voltage circuit can be lowered.

Description

technical field [0001] The invention belongs to the technical field of electric power, and in particular relates to a high-voltage detection circuit and a detection method thereof. Background technique [0002] With the rapid development of new energy, new energy can provide power for more and more equipment, such as battery modules, battery packs, etc., can be used as power sources to provide power for new energy vehicles, new energy ships, new energy aircraft, etc. [0003] The safety of high-voltage circuits such as battery modules and battery packs that provide power is one of the important considerations for the safety of power battery systems. Due to the increased insulation resistance and capacitance in new energy vehicles, etc., when disconnecting the loop of the high-voltage circuit or turning on the loop of the high-voltage circuit, it takes a long time to achieve accurate fault detection of the high-voltage circuit, increasing The safety risk of high-voltage circ...

AI Technical Summary

Problems solved by technology

Due to the increased insulation resistance and capacitance in new energy vehicles, etc., when disconnecting the loop of the high-voltage circuit or turning on the loop of the high-voltage circuit, it takes a long time to achieve accurate fault detection of the high-voltage circuit, increasing The safety risk of high-voltage circuits

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