Abstract: A planar carrier for mounting on a rim of a steering wheel without wrinkles, the planar carrier including a portion of planar flexible foil of roughly rectangular shape having two longitudinal sides and two lateral sides, wherein the length B of the lateral sides is 0.96 to 1.00 times the perimeter of the rim, and wherein N cut-outs per unit length are provided on each of the longitudinal sides. The cut-outs of one side are located in a staggered fashion relative to opposing cut-out portions on the opposite side. The optimum shape and size of the cut-outs may be determined as described. The planar carrier may be implemented as a heat carrier, a heating device and/or a sensing device.

Abstract: A battery heating unit for use in a rechargeable battery unit includes a first electrically insulating sheet having even, parallel surfaces, a plurality of electrically resistive, planar heater members, arranged on one of the surfaces of the first electrically insulating sheet, a plurality of electrically conductive contact members that are arranged on the surface of the first electrically insulating sheet, and a plurality of first electrically conductive tracks that are arranged on the surface of the first electrically insulating sheet. The planar heater members are electrically connected by the electrically conductive tracks to the plurality of electrically conductive contact members.

Abstract: A flat built temperature control unit for use in a rechargeable battery unit, in particular a rechargeable lithium ion battery. The temperature control unit includes at least one temperature sensor arranged on one of the surfaces of a first electrically insulating sheet. A plurality of first electrically conductive tracks electrically connects the at least one temperature sensor to a plurality of electrically conductive contact members. A rechargeable electrochemical battery unit, in particular for automotive applications, comprises at least one battery block including a plurality of stacked battery cells, at least one disclosed temperature control unit, and a control unit that is configured for receiving an output signal of at least one temperature sensor and for controlling operation of at least one out of cooler and heater based on the received output signal and on fulfillment of at least one predetermined condition.

Abstract: A planar carrier for mounting on a rim of a steering wheel without wrinkles, the planar carrier including a portion of planar flexible foil of roughly rectangular shape having two longitudinal sides and two lateral sides, wherein the length B of the lateral sides is 0.96 to 1.00 times the perimeter of the rim, and wherein N cut-outs per unit length are provided on each of the longitudinal sides. The cut-outs of one side are located in a staggered fashion relative to opposing cut-out portions on the opposite side. The optimum shape and size of the cut-outs may be determined as described. The planar carrier may be implemented as a heat carrier, a heating device and/or a sensing device.