Vehicle battery jump starter powered by a removable and rechargeable battery pack

Patent metadata

Field	Value
Publication number	US-11752894-B2
Application number	US-202217588900-A
Country	US
Kind code	B2
Filing date	Jan 31, 2022
Priority date	Aug 21, 2018
Publication date	Sep 12, 2023
Grant date	Sep 12, 2023

Abstract

A vehicle battery jump starter that is powered by a removable and rechargeable battery pack, such as a battery pack used with various hand-held power tools. The battery pack removably connects to a vehicle battery jump starter and can be selectively used to charge a power boost module within the vehicle battery jump starter. The power boost module includes, for example, a plurality of supercapacitors or lithium polymer battery cells. The power boost module in combination with the battery pack 100 can be used to jump start a vehicle battery.

First claim

What is claimed is:

1. A system comprising:
a power tool;
a vehicle battery jump starter;
a battery pack electrically connectable to at least one of the power tool and the vehicle battery jump starter; and
a controller including an electronic processor configured to:
operate the battery pack in accordance with a first operating parameter when the battery pack is connected to the power tool; and
operate the battery pack in accordance with a second operating parameter when the battery pack is connected to the vehicle battery jump starter.

2. The system of claim 1 , wherein:
the first operating parameter is a first voltage threshold; and
the second operating parameter is a second voltage threshold.

3. The system of claim 2 , wherein a value of the second voltage threshold has is greater than a value of the first voltage threshold.

4. The system of claim 3 , wherein, if the battery pack was to be used by the vehicle battery jump starter to jump start a vehicle battery when a voltage of the battery pack is less than the second voltage threshold, the voltage of the battery pack would decrease below the first voltage threshold.

5. The system of claim 3 , wherein, if the battery pack was to be used by the vehicle battery jump starter to jump start a vehicle battery when a voltage of the battery pack is greater than the second voltage threshold, the voltage of the battery pack would not decrease below the first voltage threshold.

6. The system of claim 2 , wherein the controller is further configured to prevent the battery pack from discharging current to the vehicle battery jump starter when a voltage of the battery pack is less than the second voltage threshold.

7. The system of claim 1 , wherein:
the vehicle battery jump starter includes a power boost module that is configured to be charged with a discharge current from the battery pack; and
the battery pack is connected in parallel with the power boost module.

8. The system of claim 1 , wherein the battery pack is a power tool battery pack.

9. A battery pack comprising:
an interface configured to electrically connect the battery pack to at least one of a vehicle battery jump starter and a power tool;
one or more battery cells configured to power the at least one of the vehicle battery jump starter and the power tool; and
a controller including an electronic processor configured to:
operate the battery pack in accordance with a first operating parameter when the battery pack is connected to the power tool; and
operate the battery pack in accordance with a second operating parameter when the battery pack is connected to the vehicle battery jump starter.

10. The battery pack of claim 9 , wherein:
the first operating parameter is a first voltage threshold; and
the second operating parameter is a second voltage threshold.

11. The battery pack of claim 10 , wherein a value of the second voltage threshold is greater than a value of the first voltage threshold.

12. The battery pack of claim 11 , wherein, if the battery pack was to be used by the vehicle battery jump starter to jump start a vehicle battery when a voltage of the battery pack is less than the second voltage threshold, the voltage of the battery pack would decrease below the first voltage threshold.

13. The battery pack of claim 11 , wherein, if the battery pack was to be used by the vehicle battery jump starter to jump start a vehicle battery when a voltage of the battery pack is greater than the second voltage threshold, the voltage of the battery pack would not decrease below the first voltage threshold.

14. The battery pack of claim 10 , wherein the controller is further configured to prevent the battery pack from discharging current to the vehicle battery jump starter when a voltage of the battery pack is less than the second voltage threshold.

15. The battery pack of claim 9 , wherein:
the battery pack is configured to provide a discharge current to the vehicle battery jump starter to charge a power boost module; and
the battery pack is electrically connected in parallel with the power boost module circuit when the battery pack is connected to the vehicle battery jump starter.

16. The battery of claim 9 , wherein the battery pack is a power tool battery pack.

17. A method of operating a removable and rechargeable battery pack, the method comprising:
operating, by a controller including an electronic processor, the removable and rechargeable battery pack in accordance with a first operating parameter when the removable and rechargeable battery pack is attached to a power tool;
attaching the removable and rechargeable battery pack to a vehicle battery jump starter, the vehicle battery jump starter including a power boost module;
electrically connecting the removable and rechargeable battery pack to the power boost module to charge the power boost module; and
operating, by the controller, the removable and rechargeable battery pack in accordance with a second operating parameter when the removable and rechargeable battery pack is attached to the vehicle battery jump starter.

18. The method of claim 17 , wherein:
the first operating parameter is a first voltage threshold;
the second operating parameter is a second voltage threshold; and
a value of the second voltage threshold is greater than a value of the first voltage threshold.

19. The method of claim 18 , further comprising charging the power boost module with a discharge current from the removable and rechargeable battery pack when a voltage of the removable and rechargeable battery pack is greater than the second voltage threshold.

20. The method of claim 18 , further comprising:
preventing, by the controller, discharge of current from the removable and rechargeable battery pack when a voltage of the removable and rechargeable battery pack is less than the second voltage threshold.

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Wekwert James
• Mueckl Gareth
• Mchugh Randolph

Classifications

• H02J7/94

  in response to battery current · CPC title

• F02N11/12 Primary

  Starting of engines by means of mobile, e.g. portable, starting sets · CPC title

• B60L53/80 Primary

  Exchanging energy storage elements, e.g. removable batteries · CPC title

• H02J7/34

  Parallel operation in networks using both storage and other DC sources, e.g. providing buffering (H02J7/14 takes precedence) · CPC title

• H02J7/345

  using capacitors as storage or buffering devices · CPC title