Milwaukee Electric Tool Corporation

James K Dykstra

Matthew R Polakowski

Paul C Chao

Jeffrey M Brozek

Mahesh M Swamy

Michael A Matthews

Michael Halverson

Benjamin C Tesch

Samantha L Billetdeaux

Andrew Lentz

Omid Shirazi

Nathan J Gustafson

Andrew J Spaulding

Catherine Kelli Semon

Brian M Hockers

Chun Jian Tang

A portable power supply including an internal power source, an AC output, a DC output, and an input unit configured to receive power from a first external source. The portable power supply further includes a first power conversion unit configured to convert the power received from the first external source to a first DC power used for charging the internal power source, an AC power conversion unit configured to convert power output by the internal power source to an AC power used for powering a first peripheral device connected to the AC output, and a DC power conversion unit configured to convert power output by the internal power source to a second DC power used for powering a second peripheral device connected to the DC output.

Portable power supply

Systems described herein include a battery pack including one or more battery cells and a first resistive element connected to a positive electrode of a first battery cell. The systems also include an external device capable of receiving the battery pack. The external device includes a second resistive element, a switch, and a controller. The second resistive element is configured to be in series with the first resistive element upon the battery pack being received within the external device. The switch is positioned in series with the second resistive element and a common potential is coupled to both the battery pack and the external device. The controller is configured to activate the switch, measure a voltage between the first resistive element and the second resistive element in response to the switch being activated, and determine an identification of the battery pack based on the measured voltage.

Systems and methods for identifying a battery pack for a battery pack powered power tool

Growing community of inventors

Milwaukee, WI, United States of America

James K Dykstra