{
  "$type": "site.standard.document",
  "description": "A fuel cell stack comprising a compression plate assembly comprising a second end plate having a first planar surface and an opposing second planar surface, wherein the first planar surface is adjacent a fuel cell stack and the second planar surface is adjacent a compression housing, wherein the…",
  "path": "/patents/1380529",
  "publishedAt": "2026-04-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M8/248",
    "BALLARD POWER SYSTEMS INC."
  ],
  "textContent": "A fuel cell stack comprising a compression plate assembly comprising a second end plate having a first planar surface and an opposing second planar surface, wherein the first planar surface is adjacent a fuel cell stack and the second planar surface is adjacent a compression housing, wherein the compression housing comprises: a spring recess and a plurality of discrete grooves on its inner axial surface of the spring recess; a spring assembly in the spring recess; a load disc in the spring recess and in contact with the spring assembly; and a resilient retaining apparatus in the spring recess and in contact with the load disc; wherein the resilient retaining apparatus engages with one of the plurality of discrete grooves and the load disc and the spring assembly are physically separated from the inner axial surface of the spring recess.",
  "title": "COMPRESSION DEVICE FOR FUEL CELL STACKS"
}