Portable power supply

Patent metadata

Field	Value
Publication number	US-11495990-B2
Application number	US-202017013988-A
Country	US
Kind code	B2
Filing date	Sep 8, 2020
Priority date	Dec 12, 2013
Publication date	Nov 8, 2022
Grant date	Nov 8, 2022

Abstract

A portable power source includes a housing and a battery receptacle supported by the housing. The battery receptacle is configured to receive a battery. The portable power source also includes a first power tool battery pack port that is configured to receive a first power tool battery pack. The portable power source further includes a charging circuit coupled to the battery receptacle and the power tool battery pack, and an inverter. The charging circuit is configured to receive power from the battery receptacle and to provide power to the power tool battery pack port. The inverter includes a DC input coupled to the battery receptacle, inverter circuitry, and an AC output. The inverter circuitry is configured to receive power from the battery receptacle via the DC input, invert DC power received from the battery receptacle to AC power, and provide the AC power to the AC output.

First claim

What is claimed is:

1. A portable power source comprising:
a housing;
a first power tool battery pack supportably received at a first power tool battery pack port, the first power tool battery pack port including one of guide rails or an insertion hole for receiving the first power tool battery pack;
an energy storage device supportably received by a receptacle formed in the housing, the energy storage device not configured to be received by the one of guide rails or the insertion hole included in the first power tool battery pack port, the receptacle including:
a first clamping terminal configured to clamp and electrically connect a first terminal of the energy storage device to the portable power source; and
a second clamping terminal configured to clamp and electrically connect a second terminal of the energy storage device to the portable power source;

a power output panel including an alternating current (“AC”) output connecter for providing AC power to a peripheral device;
an inverter electrically connected to the first power tool battery pack, the energy storage device, and the AC output;
circuitry configured to connect one of the first power tool battery pack and the energy storage device for supplying power to the inverter; and
a controller including an electronic processor, the controller configured to:
control the circuitry to provide direct current (“DC”) power from the energy storage device to the inverter when a state of charge of the energy storage device is above a first voltage threshold, and
control the circuitry to provide DC power from the first power tool battery pack to the inverter when the state of charge of the energy storage device is below the first voltage threshold or the energy storage device is disconnected from the receptacle.

2. The portable power source of claim 1 , wherein the energy storage device receives DC power from first power tool battery pack when the state of charge of the energy storage device is below the first voltage threshold.

3. The portable power source of claim 1 , wherein the first clamping terminal includes semi-circular first and second conducting portions that are configured to encircle the first terminal of the energy storage device; and
wherein the second clamping terminal includes semi-circular third and fourth conducting portions that are configured to encircle the second terminal of the energy storage device.

4. The portable power source of claim 1 , further comprising a second power tool battery pack supportably received by a second power tool battery pack port.

5. The portable power source of claim 4 , wherein the second battery pack receives DC power from the first power tool battery pack when a state of charge of the second battery pack is below a second voltage threshold.

6. The portable power source of claim 1 , wherein the power output panel further includes a DC output connector coupled to the circuitry, the energy storage device, and the first power tool battery pack port.

7. The portable power source of claim 6 , wherein the controller is further configured to:
provide DC power from the energy storage device to the DC output connector when the state of charge of the energy storage device is above the first voltage threshold and provide the DC power to a second peripheral device; and
provide DC power from the first power tool battery pack to the DC output connector when the state of charge of the energy storage device is below the first voltage threshold or the energy storage device is disconnected from the receptacle and provide the DC power to the second peripheral device.

8. The portable power source of claim 7 , wherein the energy storage device receives DC power from the first power tool battery pack when the state of charge of the energy storage device is below the first voltage threshold.

9. The portable power source of claim 8 , further comprising a second power tool battery pack supportably received by a second power tool battery pack port.

10. The portable power source of claim 9 , wherein the second battery pack receives DC power from the first power tool battery pack when a state of charge of the second battery pack is below a second voltage threshold.

11. A method of operating a portable power source comprising:
receiving, by one of guide rails or an insertion hole, a first power tool battery pack at a first power tool battery pack port supported by a housing of the portable power source;
receiving an energy storage device at a receptacle formed in the housing of the portable power source, the energy storage device not configured to be received by the one of guide rails or the insertion hole included in the first power tool battery pack port;
electrically connecting, by a first clamping terminal, a first terminal of the energy storage device to the portable power source;
electrically connecting, by a second clamping terminal, a second terminal of the energy storage device to the portable power source;
controlling, by a controller having an electronic processor, circuitry to provide direct current (“DC”) power from the energy storage device to an inverter when a state of charge of the energy storage device is above a first voltage threshold;
controlling, by the controller, circuitry to provide DC power from the first power tool battery pack to the inverter when the state of charge of the energy storage device is below the first voltage threshold or the energy storage device is disconnected from the receptacle;
inverting, by the inverter, the received DC power to alternating current (“AC”) power; and
providing the AC power to an AC output.

12. The method of claim 11 , wherein the first clamping terminal includes semi-circular first and second conducting portions that are configured to encircle the first terminal of the energy storage device; and
wherein the second clamping terminal includes semi-circular third and fourth conducting portions that are configured to encircle the second terminal of the energy storage device.

13. The method of claim 11 , further comprising receiving, at the energy storage device, DC power from first power tool battery pack when the state of charge of the energy storage device is below the first voltage threshold.

14. The method of claim 11 , further comprising receiving a second power tool battery pack at a second power tool battery pack port supported by the housing of the portable power source.

15. The method of claim 14 , further comprising receiving, at the second power tool battery pack, DC power from the first power tool battery pack when a state of charge of the second battery pack is below a second voltage threshold.

16. The method of claim 11 , further comprising controlling, by the controller, circuitry to provide DC power from the energy storage device to a DC output connector of the portable power source when the state of charge of the energy storage device is above the first voltage threshold; and
providing, by the DC output connector, the received DC power to a peripheral device.

17. The method of claim 11 , further comprising controlling, by the controller, circuitry to provide DC power from the first power tool battery pack to the DC output connector when the state of charge of the energy storage device is below the first voltage threshold or the energy storage device is disconnected from the receptacle; and
providing, by the DC output connector, the received DC power to a peripheral device.

18. A portable power source comprising:
a housing;
a first power tool battery pack supportably received at a fir

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Fry Paul
• Harvey Kyle

Classifications

• H02J2105/44

  Portable electronic devices · CPC title

• H02J7/825

  Detection of fully charged condition · CPC title

• H02J7/751

  concerning the insertion or the connection of the batteries · CPC title

• H02J7/731

  specially adapted for holding portable devices containing batteries (H02J7/751 takes precedence) · CPC title

• H02J7/585

  Sequential battery discharge in systems with a plurality of batteries · CPC title