Double-power-source fault detecting system

Abstract

The invention discloses a double-power-source fault detecting system which comprises a first power source (1), a second power source (2), a current sensor (3), a load (4) and a control circuit (5). One ends, with the same polarity, of the two power sources are coupled to the current sensor (3); the direction of the output current of the second power source (2) and the direction of the output current of the first power source (1) are opposite when the output current of the second power source (2) and the output current of the first power source (1) pass through the current sensor (3); after the output currents of the two power sources pass through the current sensor (3), output circuits of the two power sources are coupled to the load (4); the current sensor (3) is coupled to the control circuit (5); and the other ends, which are not coupled with the current sensor (3), of the first power source (1) and the second power source (2) are coupled to the load (4). The double-power-source fault detecting system aims to overcome shortcomings in the prior art, is simple and reliable in structure, and can effectively monitor faults through the current sensor when the two power sources work.

Description

Technical field [0001] The invention relates to the field of power failure detection, in particular to a dual-circuit power failure detection system for hybrid electric vehicles and pure electric vehicles. Background technique [0002] At present, in hybrid electric vehicles and pure electric vehicles, the detection means for power supply failures is to couple several current sensors to the terminals of the power circuit. In order to provide more stable and sufficient power, most of the current power supplies are connected in parallel with two power supplies to provide power for the drive system. For two power supplies, the traditional method needs to couple two current sensors to two power circuits, and then sense each power circuit in turn before transmitting the sensed signal to the controller. This does not require multiple current sensors and their Processing circuit components increases the manufacturing cost, and the controller needs to process two different signals, whic...

AI Technical Summary

Problems solved by technology

For two-way power supplies, the traditional method needs to couple two current sensors to the two power supply loops, sense each power supply loop in turn, and then transmit the sensing signal to the controller, which does not require multiple current sensors and their Processing circuit components increases the manufacturing cost, and the controller needs to process two different signals, which increases the complexity of the circuit of the controller and the complexity of the working mode of the controller, and this processing method requires the controller to Multiple signals are analyzed resulting in unstable detection results

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