{
  "node": {
    "id": "term:pouch-foil",
    "type": "Term",
    "label": "Pouch foil",
    "properties": {
      "id": "pouch-foil",
      "name": "Pouch foil",
      "aka": [
        "aluminium laminate"
      ],
      "section": "topic-components",
      "definition": "The flexible case of a pouch cell: a thin aluminium layer laminated between a polyamide outer film and a heat-sealable polypropylene inner film. It is light and cheap but offers no mechanical support and can swell.",
      "related": [
        "pouch-cell",
        "can",
        "swelling"
      ],
      "url": "https://lemonergy.com/learn/glossary/pouch-foil/",
      "mentions": [
        "polyethylene-polypropylene"
      ]
    }
  },
  "edges": [
    {
      "id": "edge:613",
      "source": "term:pouch-foil",
      "target": "topic:topic-components",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:614",
      "source": "term:pouch-foil",
      "target": "term:pouch-cell",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:615",
      "source": "term:pouch-foil",
      "target": "term:can",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:616",
      "source": "term:pouch-foil",
      "target": "term:swelling",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/pouch-foil/polyethylene-polypropylene",
      "source": "term:pouch-foil",
      "target": "term:polyethylene-polypropylene",
      "type": "mentions",
      "properties": {
        "sourceFile": "terms.json",
        "method": "build_glossary.mention_index + mentions",
        "field": "definition",
        "meaning": "Text mention; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-components",
      "type": "Topic",
      "label": "Cell components and electrode materials",
      "properties": {
        "id": "topic-components",
        "name": "Cell components and electrode materials",
        "lede": "What a cell is physically made of — active materials, binders, additives, foils and tabs — and how its electrodes are put together.",
        "context": "Connect each material with its function.",
        "example": "Electrons travel through additive, foil and tab; ions use electrolyte and separator pathways.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/cell-anatomy/",
        "lesson_label": "Open cell anatomy"
      }
    },
    {
      "id": "term:pouch-cell",
      "type": "Term",
      "label": "Pouch cell",
      "properties": {
        "id": "pouch-cell",
        "name": "Pouch cell",
        "aka": [
          "lithium polymer cell",
          "LiPo"
        ],
        "section": "topic-chemistries",
        "definition": "A cell sealed in a flexible bag of aluminium laminated with plastic, holding stacked electrode sheets in larger cells or a flattened wound roll in many small ones. It is light and easy to cool, but needs outside support and can visibly swell if gas forms inside.",
        "related": [
          "pouch-foil",
          "stacking",
          "swelling",
          "degassing",
          "prismatic-cell"
        ],
        "lesson": "fundamentals/cell-production/#formats",
        "example": {
          "title": "Include mechanical support",
          "text": "A pouch encloses layered electrodes. Support provided by the module is part of the complete design, separate from the active layers."
        },
        "url": "https://lemonergy.com/learn/glossary/pouch-cell/",
        "mentions": [
          "electrode"
        ]
      }
    },
    {
      "id": "term:can",
      "type": "Term",
      "label": "Can",
      "properties": {
        "id": "can",
        "name": "Can",
        "aka": [
          "casing",
          "housing"
        ],
        "section": "topic-components",
        "definition": "The rigid metal case of a cylindrical or prismatic cell, usually nickel-plated steel or aluminium. It holds the stack under pressure, contains the electrolyte and, in a cylindrical cell, doubles as the negative terminal.",
        "related": [
          "cylindrical-cell",
          "prismatic-cell",
          "pouch-foil",
          "vent",
          "helium-leak-test"
        ],
        "url": "https://lemonergy.com/learn/glossary/can/",
        "mentions": [
          "electrolyte"
        ]
      }
    },
    {
      "id": "term:swelling",
      "type": "Term",
      "label": "Swelling",
      "properties": {
        "id": "swelling",
        "name": "Swelling",
        "section": "topic-aging",
        "definition": "Growth in a cell’s thickness, reversibly as the electrodes expand on charge and irreversibly as gas and SEI accumulate. Packs allow for it with compression pads, and a sudden swell in service is a warning sign.",
        "related": [
          "gas-generation",
          "pouch-cell",
          "silicon-anode",
          "stack-pressure",
          "compression-pad",
          "swelling-test"
        ],
        "url": "https://lemonergy.com/learn/glossary/swelling/",
        "mentions": [
          "sei"
        ]
      }
    },
    {
      "id": "term:polyethylene-polypropylene",
      "type": "Term",
      "label": "Polyethylene and polypropylene",
      "properties": {
        "id": "polyethylene-polypropylene",
        "name": "Polyethylene and polypropylene",
        "abbr": "PE, PP",
        "aka": [
          "polyolefin",
          "polyethylene",
          "polypropylene"
        ],
        "section": "topic-electrolytes",
        "definition": "The two commodity polyolefins of a cell. Almost every separator is PE, PP or a layered combination: PE melts near 130 °C and closes its pores, while PP keeps its shape to about 165 °C. PP also forms the heat-sealing inner layer of pouch foil, and both appear in packs as insulating films and moulded parts.",
        "related": [
          "separator",
          "dry-wet-separator-process",
          "separator-shutdown",
          "pouch-foil",
          "ceramic-coated-separator"
        ],
        "url": "https://lemonergy.com/learn/glossary/polyethylene-polypropylene/",
        "mentions": []
      }
    }
  ]
}