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Detecting system and detection circuit for detecting health status of backup power supply module

  • US 10,635,147 B2
  • Filed: 10/27/2017
  • Issued: 04/28/2020
  • Est. Priority Date: 06/15/2017
  • Status: Active Grant
First Claim
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1. A detection circuit for detecting health status of backup power supply module, which is applied in an electronic device, the detection circuit comprising:

  • a first switch;

    a second switch;

    a boost converter for receiving an input voltage and generating a first high voltage;

    a controller connected to the first switch, the second switch, and the boost converter, respectively, when the detection circuit is operated in a normal operating state, the controller will send a first control signal to the first switch, the second switch, and the boost converter, so that the boost converter is allowed to output the first high voltage, the first switch is turned on, and the second switch is turned off;

    otherwise, when the detection circuit is operated in a detection state, the controller will send a second control signal to the first switch, the second switch, and the boost converter, so that the boost converter is inhibited to output the first high voltage, the first switch is turned off, and the second switch is turned on, wherein a discharged time threshold value is defined in the controller; and

    at least one backup power supply module, wherein the backup power supply module, the controller, the first switch, the second switch, and the boost converter are connected to a first node together, a node voltage is generated on the first node;

    wherein when the detection circuit is operated in the normal operating state, the backup power supply module can execute a charging process by the first high voltage outputted from the boost converter;

    when the detection circuit is operated in the detection state, the backup power supply module can execute a discharging process so as to provide a discharged energy to a load device via the second switch, the controller can detect a time at which the node voltage is dropped from a first voltage to a second voltage so as to obtain a discharged time detection value;

    thus, the controller can know a health status of the backup power supply module according to a comparison between the discharged time detection value and the discharged time threshold value.

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