ELECTRICALLY HEATABLE HONEYCOMB BODY ASSEMBLY HAVING AN ELECTRICAL CONNECTION OF A PLURALITY OF SHEET METAL LAYERS

摘要

An electrically heatable honeycomb body assembly includes an electrical connection of sheet metal layers at a connection pin. A honeycomb body has a metal casing with an inner periphery, through which the connection pin is led in a bushing and electrically insulated. The sheet metal layers are alternately coarsely structured and finely structured or smooth sheets together forming a stack with uppermost and lowermost layers and channels for an axial gas flow between the layers. The connection pin runs radially approximately perpendicular to the layers and is metallically connected to at least two or all of the layers through at least one intermediate piece. The uppermost sheet metal layer preferably runs approximately parallel to the metal casing over at least 35% of the inner periphery and is separated therefrom only by an air gap. Simple production of an operationally safe and very uniformly electrically heatable honeycomb body is provided.

主权项

1. A honeycomb body assembly, comprising:
a honeycomb body having a metal casing with an inner periphery, a radial direction, an axial direction and a bushing passing through said metal casing; alternately disposed coarsely structured sheet metal layers and finely structured or smooth sheet metal layers together forming a stack with an uppermost sheet metal layer, a lowermost sheet metal layer, an inlet side, an outlet side, a connection region and channels between said sheet metal layers through which a gas can flow from said inlet side to said outlet side in said axial direction; a connection pin running perpendicular to said sheet metal layers in said radial direction and passing through said inner periphery in said bushing in an electrically insulating manner; and at least one electrically conductive intermediate piece surrounding a plurality of said sheet metal layers in said connection region and providing a metallic electrical connection of said connection pin to at least two of said sheet metal layers.