Patent ID: 7947925
Filing Date: 2011-05-24
Classification: H05B

Abstract:
1. A heater unit for heating a battery structure, the battery structure including a housing case, a plurality of secondary batteries housed in the housing case, and a surface to be heated that is at least a portion of an outer surface of the housing case, the heater unit comprising: a sheet heater of a laminated structure that defines a first surface and a second surface, the sheet heater including: a holding member which holds the sheet heater, the holding member being arranged to be fixed to the outer surface of the housing case, the holding member having a flange with a contact surface; and a foam sheet placed between the second surface of the sheet heater and the holding member, the foam sheet being elastically deformable in at least a thickness direction of the sheet heater, wherein the foam sheet is deformable when the holding member is fixed to the outer surface of the housing case, the foam sheet pressing the entire second surface of the sheet heater such that the entire first surface of the sheet heater is in close contact with the surface of the battery structure to be heated, and the foam sheet being deformed such that the first surface of the sheet heater is aligned with the contact surface of the flange of the holding member.