Patent ID: 11909251
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 18:
19. A battery charger comprising:
a housing that supports a battery connector configured to receive and support a battery pack, the battery connector including:
electrical terminals configured to engage electrical terminals of the battery pack, and
a mechanical coupling configured to engage a mechanical interface of the battery pack;

an engine including an output shaft, the engine configured to receive propane and drive the output shaft;
an alternator including a rotor and stator coils, wherein the output shaft is mechanically coupled to the rotor, and an electrical current is induced in the stator coils by rotation of the rotor; and
an electrical circuit that receives the electrical current and is configured to:
determine when the battery pack is coupled to the battery connector, and
charge the battery pack based on the determination,

wherein the electrical circuit operates the engine based on a charging current being provided to the battery pack.