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Battery backup sump pump systems and methods

  • US 9,885,360 B2
  • Filed: 10/25/2012
  • Issued: 02/06/2018
  • Est. Priority Date: 10/25/2012
  • Status: Active Grant
First Claim
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1. A backup sump pump system for a sump, the backup sump pump system comprising:

  • a portable housing including a first half and a second half, and one of the first half and the second half including a control panel and a rechargeable battery;

    a battery charger, the battery charger integrated into the portable housing;

    control circuitry integrated into the portable housing, the control circuitry to be powered by a line power and when the line power is not available, the control circuitry to be powered by a battery power from the rechargeable battery, the control circuitry connected to the control panel and including a pressure transducer, the control circuitry coupled to the battery charger;

    a backup sump pump connected to the control circuitry; and

    a boost circuit connected to the control circuitry, the boost circuit to provide a substantially constant voltage to the backup sump pump when the line power is not available while allowing the rechargeable battery to drop to a predetermined lower voltage; and

    a fluid level sensor connected to the pressure transducer, the pressure transducer to measure a pressure in the fluid level sensor to detect a rate of water level increase in the sump, and based on the measured pressure in the fluid level sensor, the control circuitry to operate the backup sump pump at a first speed when the rate of water level indicates a water level in the sump is falling, and to operate the backup sump pump at a second, higher speed when the rate of water level indicates the water level in the sump is rising required to keep up with the rate of water level increase; and

    a contact sensor, the contact sensor connected to the control circuitry and coupled to the fluid level sensor to provide a signal to the control circuitry when the contact sensor comes into contact with a fluid.

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