Patent ID: 11894528
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A battery pack system, comprising:
a first battery pack including:
a first housing,
a first plurality of battery cells supported by the first housing, the first battery pack having a nominal capacity of up to about 6 Amp-hours (Ah),
a first terminal block configured to be coupled to a power tool to provide operating power from the first plurality of battery cells to the power tool, the terminal block having a first positive power terminal, a first charging terminal, and a first ground terminal, and
a first charging circuit provided between the first charging terminal and the first plurality of battery cells, the first charging circuit configured to receive and transfer charging current above 12 Amperes to the first plurality of battery cells during charging; and

a second battery pack including:
a second housing,
a second plurality of battery cells supported by the second housing, the second battery pack having a nominal capacity of between about 6 Ah and about 27 Ah,
a second terminal block configured to be coupled to the power tool to provide operating power from the second plurality of battery cells to the power tool, the second terminal block having a second positive power terminal, a second charging terminal, and a second ground terminal, and
a second charging circuit provided between the second charging terminal and the second plurality of battery cells, the second charging circuit configured to receive and transfer charging current above 12 Amperes to the second plurality of battery cells during charging, wherein the second battery pack is configured to receive a charging current of about 18 Amperes for charging the second plurality of battery cells.