Apparatus and method of manufacturing a stepped porous transport layer for an electrochemical cell from a die and block
AssigneeRobert Bosch GmbH
InventorsJonathan BRAATEN, Lei CHENG, Shirin MEHRAZI, Felipe MOJICA, Bjoern STUEHMEIER
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Abstract
A method of manufacturing a porous transport layer (PTL) for an electrochemical cell includes placing a porous sheet between a base die having a top face profile and a compression block having a bottom face profile, and 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.
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
- 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.
A porous transport layer (PTL) pressing device comprising:
- a compression block having a bottom face profile;
- and
- a base die having a top face profile, the compression block and the base die are cooperatively configured to deform 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.