Patent ID: 11860236
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H  Y | IPC G  H

Claim 15:
16. A device for providing output power to electrical equipment, the device comprising:
one or more battery cells;
a heating element operable to provide heat to the one or more battery cells;
a temperature sensing device operable to sense an air temperature;
a heating switch operable to control whether power is provided to the heating element;
a charging switch operable to control whether charging power is provided to the one or more battery cells; and
an electronic processor coupled to the temperature sensing device, the heating switch, and the charging switch, the electronic processor configured to:
receive a signal from the temperature sensing device, the signal indicative of the air temperature,
determine that the air temperature is less than a predetermined temperature threshold,
close, in response to determining that the air temperature is less than the predetermined temperature threshold, the heating switch to provide power to the heating element, and
open, in response to determining that the air temperature is less than the predetermined temperature threshold, the charging switch to prevent power from being provided to the one or more battery cells.