• 专利标题:   Method of making bipolar plate for fuel cell, involves hot isostatically pressing bag out metal foil under vacuum sealed bipolar plate blank at greater pressure and certain temperature, and detaching hot isostatically pressed bipolar plate blank from metal foil pouch to obtain bipolar plate.
  • 专利号:   DE102022209702-A1, US2023109892-A1, CN115966709-A
  • 发明人:   XIE X, CHEN B, ZHANG X
  • 专利权人:   BOSCH LLC ROBERT, BOSCH GMBH ROBERT, BOSCH GMBH ROBERT
  • 国际专利分类:   C25B011/036, H01M008/0202, H01M004/86, H01M004/88
  • 专利详细信息:   DE102022209702-A1 13 Apr 2023 C25B-011/036 202333 German
  • 申请详细信息:   DE102022209702-A1 DE10209702 15 Sep 2022
  • 优先权号:   CN11174421

▎ 摘  要

NOVELTY - The method involves preparing a bipolar plate blank from an electrically conductive filler and a polymer adhesive. The bipolar plate blank is sealed in a metal foil bag under vacuum. The bag out metal foil is hot isostatically pressed under vacuum sealed bipolar plate blank at a pressure greater than 100 MPa and a temperature of 150-400 ?o C. The bipolar plate blank is detached from metal foil pouch to obtain bipolar plate. The electrically conductive filler content is 90-99 wt. %, based on total weight of mixture of conductive filler and polymer adhesive. The content of the polymer adhesive is 1 - 20 wt. %. The metal foil pouch is made of copper foil or nickel foil. The electrically conductive filler is a carbonaceous material selected from graphite, graphene, carbon nanotubes. The graphite is selected from flake graphite, ultrafine graphite, expandable graphite. The polymeric adhesive is selected from phenolic resins, epoxy resins, vinyl esters, polyimides, polypropylenes. USE - Method of making bipolar plate for fuel cell e.g. proton exchange membrane fuel cell (all claimed) for use in electric vehicles such as automobiles, local power plants, and portable appliances. ADVANTAGE - The method provides a bipolar plate with high electrical conductivity and low gas permeability. The density, electrical conductivity and mechanical strength of the bipolar plate are improved. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for bipolar plate for a fuel cell. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the bipolar plate for fuel cell.