US 12,272,977 B2
Modular unit with integrated battery charger
Matthew J. Peña, Wauwatosa, WI (US); and Cameron R. Schulz, Milwaukee, WI (US)
Assigned to Milwaukee Electric Tool Corporation, Brookfield, WI (US)
Filed by Milwaukee Electric Tool Corporation, Brookfield, WI (US)
Filed on Oct. 19, 2021, as Appl. No. 17/505,273.
Application 17/505,273 is a continuation of application No. PCT/US2021/053557, filed on Oct. 5, 2021.
Claims priority of provisional application 63/157,164, filed on Mar. 5, 2021.
Claims priority of provisional application 63/088,291, filed on Oct. 6, 2020.
Prior Publication US 2022/0109314 A1, Apr. 7, 2022
Int. Cl. H02J 7/00 (2006.01)
CPC H02J 7/0045 (2013.01) [H02J 7/0013 (2013.01); H02J 7/0024 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A charging device comprising:
a housing;
a power input extending from the housing, the power input configured to receive alternating current electricity;
a bottom surface defined by the housing;
a plurality of coupling components extending from the bottom surface, each of the plurality of coupling components comprising a ledge defining an upper surface that faces upward towards the bottom surface; and
a plurality of power tool battery interfaces comprising a first power tool battery interface configured to physically couple with a rechargeable power tool battery and to receive power from the power input, the plurality of power tool battery interfaces configured to physically couple with the rechargeable power tool battery and to receive power from the power input, the plurality of power tool battery interfaces comprising a first subset of power tool battery interfaces and a second subset of power tool battery interfaces distinct from the first subset, wherein the first subset receives power in parallel with the second subset, wherein the power tool battery interfaces within the first subset receive power in series with respect to each other, and wherein the power tool battery interfaces within the second subset receive power in series with respect to each other.