Power tool and method for wireless communication

Patent metadata

Field	Value
Publication number	US-9756402-B2
Application number	US-201615146535-A
Country	US
Kind code	B2
Filing date	May 4, 2016
Priority date	May 4, 2015
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

A power tool having multiple wireless communication states and a method of wirelessly communicating by a power tool. The power tool includes a motor, a battery pack interface that selectively receives a battery pack, a backup power source, and a wireless communication controller coupled to the backup power source and the battery pack interface. The wireless communication controller operates in a connectable state when coupled to a battery pack and transmits tool operational data to the external device and receives tool configuration data from the external device. The wireless communication controller operates in an advertisement state when the wireless communication controller is coupled to and powered by the backup power source. In the advertisement state, the wireless communication controller is configured to transmit the unique tool identifier. The external device may also display an indication of the communication state of the power tool.

First claim

What is claimed is:

1. A power tool having multiple wireless communication states, the power tool comprising:
a motor;
a battery pack interface that selectively receives a battery pack;
a backup power source; and
a wireless communication controller coupled to the backup power source and the battery pack interface, the wireless communication controller including a wireless transceiver, a processor, and a unique tool identifier, the wireless communication controller configured to:
operate in a connectable state when the wireless communication controller is coupled to and powered by the battery pack, wherein, in the connectable state, the wireless communication controller is configured to form a wireless communication link with an external device and to one or more of transmit tool operational data to the external device and receive tool configuration data from the external device, and
operate in an advertisement state when the wireless communication controller is coupled to and powered by the backup power source, wherein, in the advertisement state, the wireless communication controller is configured to transmit an advertisement message including the unique tool identifier, wherein transmitting of the advertisement message in the advertisement state includes periodic broadcasting of the advertisement message, and wherein the advertisement message further includes a charge level of the backup power source.

2. The power tool of claim 1 , further comprising
a switching network coupled between the motor and the battery pack interface;
an actuator;
a controller coupled to the actuator and the switching network, the controller configured to control the switching network to apply power from the battery pack to drive the motor based on actuator activation.

3. The power tool of claim 2 , further comprising a communication channel coupling the controller to the wireless communication controller, wherein the controller further includes a memory storing the tool operational data obtained by a processing unit of the controller, and the wireless communication controller is further configured to, in the connectable state, obtain the tool operational data from the controller over the communication channel and transmit the tool operational data to the external device.

4. The power tool of claim 2 , further comprising a communication channel coupling the controller to the wireless communication controller, the wireless communication controller is further configured to, in the connectable state, obtain the tool configuration data from the external device and to provide the tool configuration data to the controller over the communication channel.

5. The power tool of claim 4 , wherein the controller further includes a memory storing the tool configuration data and a processing unit that controls the switching network to apply power from the battery pack to drive the motor based on the tool configuration data.

6. The power tool of claim 2 , wherein the controller is unpowered when the wireless communication controller is in the advertisement state and the battery pack is disconnected from the battery pack interface.

7. The power tool of claim 1 , further comprising a housing that houses the motor and the wireless communication controller, the housing including a backup battery receptacle for receipt of the backup power source.

8. The power tool of claim 7 , wherein the backup battery receptacle is inaccessible when the battery pack is connected to the battery pack interface and accessible when the battery pack is disconnected from the battery pack interface.

9. The power tool of claim 7 , wherein the backup battery receptacle and the battery pack interface are located on a foot of the housing.

10. The power tool of claim 1 , further comprising:
a real-time clock coupled to the backup power source and configured to maintain a current time; and
a controller configured to receive a lock out time from the external device via the wireless communication controller and to receive the current time, and further configured to lock the power tool upon determining that the current time exceeds the lock out time.

11. A method of wirelessly communicating by a power tool, the method comprising:
determining, by a wireless communication controller of the power tool, that a battery pack interface is connected to a battery pack;
entering, by the wireless communication controller, a connectable state for wireless communication based on determining that the battery pack interface is connected to the battery pack;
forming a wireless communication link with an external device in the connectable state;
communicating, over the wireless communication link, to one or more of transmit tool operational data and receive tool configuration data from the external device;
determining, by the wireless communication controller, that a battery pack interface is disconnected from the battery pack;
entering, by the wireless communication controller, an advertisement state for wireless communication based on determining that the battery pack interface is disconnected from the battery pack; and
transmitting, by the wireless communication controller, an advertisement message including a unique tool identifier of the power tool when in the advertisement state.

12. The method of claim 11 , wherein entering the advertisement state includes receiving, by the wireless communication controller, power from a backup power source.

13. The method of claim 12 , wherein transmitting, by the wireless communication controller, the advertisement message further includes periodic broadcasting of the advertisement message, and wherein the advertisement message further includes a charge level of the backup power source.

14. The method of claim 11 , further comprising
detecting activation of an actuator;
controlling a switching network of the power tool to apply power from the battery pack to drive a motor of the power tool based on the actuator activation.

15. The method of claim 11 , further comprising, in the connectable state,
obtaining, from a sensor of the power tool, tool usage data;
receiving, by the wireless communication controller, the tool usage data from a memory of the power tool;
transmitting the tool usage data to the external device as part of the tool operational data.

16. The method of claim 11 , further comprising, in the connectable state,
storing the tool configuration data received from the external device to a memory of the power tool;
controlling driving a motor of the power tool based on the tool configuration data.

17. The method of claim 11 , further comprising:
controlling, by a controller, driving of a motor of the power tool when in the connectable state; and
maintaining the controller unpowered when in the advertisement state.

18. The method of claim 11 , further comprising
receiving, by a backup battery receptacle of the power tool, a backup power source;
blocking, by the battery pack, the backup battery receptacle when the battery pack is connected to the battery pack interface; and
providing access to the backup battery receptacle when the battery pack is disconnected from the battery pack interface.

19. The method of claim 11 , further comprising:
powering the wireless communication controller with power from a backup power source in the advertisement state; and
powering the wireless communication controller with power from the battery pack in the connectable state.

20. The method of claim 11 , further comprising:
d

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Stampfl Burtrom Lee
• Mergener Matthew J
• Huber Alex
• Rossetto Paul
• Conrad Cole A
• Matson Stephen
• Fischer Scott R
• Kubale Mark A
• Coulis Christian

Classifications

• H04Q2209/40

  using a wireless architecture · CPC title

• B25B21/00

  Portable power-driven screw or nut setting or loosening tools; (details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00; {for mounting or dismounting wheels B60B29/006}); Attachments for drilling apparatus serving the same purpose (machines B23P19/06) · CPC title

• B25F5/00

  Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for · CPC title

• H04Q9/00 Primary

  Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom · CPC title

• H04W4/80

  Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication · CPC title