Patent ID: 11955614
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 13:
14. A battery pack comprising:
a battery stack including a plurality of battery cells arrayed in a thickness direction;
a housing accommodating the battery stack;
a heater substrate including metal patterns that are electrified to generate heat, the heater substrate being disposed inside the housing such that the metal patterns respectively oppose the plurality of battery cells; and
a plurality of heat conduction sheets respectively interposed between a lower face of a floor wall of the plurality of battery cells and an upper face the metal patterns that faces the lower face, wherein
the metal patterns are formed by a single wire extending from a first end of the heater substrate to a second end of the heater substrate, extending in an offset direction, and returning to the first end,
the metal patterns are connected electrically in series,
a first free end of the metal patterns is connected to a positive electrode and a second free end of the metal patterns is connected to a negative electrode,
an upper face of the heat conduction sheets contact the lower face of the floor wall of the battery cells with a first predetermined pressure, and
a lower face of the heat conduction sheets contact the upper face of the metal patterns with a second predetermined pressure.