Apparatus and method of manufacturing a stepped, punched porous transport layer for an electrochemical cell
AssigneeRobert Bosch GmbH
InventorsJonathan BRAATEN, Lei CHENG, Shirin MEHRAZI, Felipe MOJICA, Bjoern STUEHMEIER
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Abstract
A porous transport layer (PTL) shearing device may include a compression block having a bottom face profile including a shearing edge, and a shearing base die having a top face profile, the compression block and the base die are cooperatively configured to deform and shear a PTL such that a perimeter edge thickness of the PTL is less than an uncompressed center portion thickness of the PTL.
Claims20
A method of manufacturing a porous transport layer (PTL) for an electrochemical cell, the method comprising:
- placing a porous sheet between a base die having a top face profile and a compression block having a bottom face profile and a cutting edge;
- drawing the base die and the compression block toward each other while maintaining a first porosity of a first region of the porous sheet and generating a second porosity of a second region of the porous sheet corresponding to the top face profile of the base die, the first porosity is greater than the second porosity;
- and
- cutting the porous sheet to obtain a cut porous sheet.
A method of manufacturing a porous transport layer (PTL) for an electrochemical cell, the method comprising:
- shearing one or more edges of the PTL with a shearing knife having a step to obtain a perimeter edge of the PTL;
- and
- simultaneously compressing the perimeter edge of the PTL.
A porous transport layer (PTL) shearing device comprising:
- a compression block having a bottom face profile including a shearing edge;
- and
- a shearing base die having a top face profile, the compression block and the base die are cooperatively configured to deform and shear a PTL such that a perimeter edge thickness of the PTL is less than an uncompressed center portion thickness of the PTL.
Dependencies are inferred from the claim text.