Todd W. Johnson, Wauwatosa, WI (US); Dennis J. Grzybowski, New Berlin, WI (US); Mark A. Kubale, West Bend, WI (US); Jay J. Rosenbecker, Menomonee Falls, WI (US); Gary D. Meyer, Waukesha, WI (US); Jeffrey M. Zeiler, Pewaukee, WI (US); Kevin L. Glasgow, Lomira, WI (US); and Karl F. Scheucher, Waite Hill, OH (US)
Assigned to Milwaukee Electric Tool Corporation, Brookfield, WI (US)
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed on May 3, 2021, as Appl. No. 17/246,921.
Application 17/246,921 is a continuation of application No. 16/588,686, filed on Sep. 30, 2019, granted, now 10,998,586.
Application 16/588,686 is a continuation of application No. 16/200,171, filed on Nov. 26, 2018, granted, now 10,431,857, issued on Oct. 1, 2019.
Application 16/200,171 is a continuation of application No. 15/785,396, filed on Oct. 16, 2017, granted, now 10,141,614, issued on Nov. 27, 2018.
Application 15/785,396 is a continuation of application No. 15/181,108, filed on Jun. 13, 2016, granted, now 9,793,583, issued on Oct. 17, 2017.
Application 15/181,108 is a continuation of application No. 14/726,140, filed on May 29, 2015, granted, now 9,368,842, issued on Jun. 14, 2016.
Application 14/726,140 is a continuation of application No. 13/943,237, filed on Jul. 16, 2013, granted, now 9,048,515, issued on Jun. 2, 2015.
Application 13/943,237 is a continuation of application No. 13/443,694, filed on Apr. 10, 2012, granted, now 8,487,585, issued on Jul. 16, 2013.
Application 13/443,694 is a continuation of application No. 12/766,965, filed on Apr. 26, 2010, granted, now 8,154,249, issued on Apr. 10, 2012.
Application 12/766,965 is a continuation of application No. 11/165,615, filed on Jun. 22, 2005, granted, now 7,714,538, issued on May 11, 2010.
Application 11/165,615 is a continuation in part of application No. 11/139,020, filed on May 24, 2005, granted, now 7,425,816, issued on Sep. 16, 2008.
Application 11/139,020 is a continuation in part of application No. 11/138,070, filed on May 24, 2005, granted, now 7,589,500, issued on Sep. 15, 2009.
Application 11/138,070 is a continuation in part of application No. 10/721,800, filed on Nov. 24, 2003, granted, now 7,253,585, issued on Aug. 7, 2007.
Application 10/721,800 is a continuation in part of application No. 10/719,680, filed on Nov. 20, 2003, granted, now 7,176,654, issued on Feb. 13, 2007.
Application 10/719,680 is a continuation in part of application No. 10/720,027, filed on Nov. 20, 2003, granted, now 7,157,882, issued on Jan. 2, 2007.
Claims priority of provisional application 60/643,396, filed on Jan. 12, 2005.
Claims priority of provisional application 60/626,230, filed on Nov. 9, 2004.
Claims priority of provisional application 60/626,013, filed on Nov. 5, 2004.
Claims priority of provisional application 60/612,352, filed on Sep. 22, 2004.
Claims priority of provisional application 60/582,728, filed on Jun. 24, 2004.
Claims priority of provisional application 60/582,730, filed on Jun. 24, 2004.
Claims priority of provisional application 60/582,138, filed on Jun. 22, 2004.
Claims priority of provisional application 60/574,616, filed on May 25, 2004.
Claims priority of provisional application 60/574,278, filed on May 24, 2004.
Claims priority of provisional application 60/523,712, filed on Nov. 19, 2003.
Claims priority of provisional application 60/523,716, filed on Nov. 19, 2003.
Claims priority of provisional application 60/440,692, filed on Jan. 17, 2003.
Claims priority of provisional application 60/440,693, filed on Jan. 17, 2003.
Claims priority of provisional application 60/428,450, filed on Nov. 22, 2002.
Claims priority of provisional application 60/428,452, filed on Nov. 22, 2002.
Claims priority of provisional application 60/428,358, filed on Nov. 22, 2002.
Claims priority of provisional application 60/428,356, filed on Nov. 22, 2002.
Prior Publication US 2021/0265676 A1, Aug. 26, 2021
a battery pack configured to be interfaced with the power tool, the battery pack including
a battery pack housing,
at least three terminals including a positive terminal, a negative terminal, and a sense terminal, the at least three terminals configured to be interfaced with corresponding terminals of the power tool, and
a plurality of rechargeable battery cells arranged within and supported by the housing, each of the battery cells having a respective state of charge, power being transferable between the battery cells and the power tool;
a balancing circuit configured to detect a charge imbalance among the battery cells based on a plurality of voltages of the plurality of rechargeable battery cells detected at substantially the same time; and
a control circuit configured to initiate a controlled discharging process to discharge at least one of the battery cells whose present state of charge is high relative to a present state of charge of another of the battery cells, the control circuit including a microprocessor.
