{
  "node": {
    "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"
      ]
    }
  },
  "edges": [
    {
      "id": "edge:836",
      "source": "term:pouch-cell",
      "target": "topic:topic-chemistries",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:837",
      "source": "term:pouch-cell",
      "target": "term:pouch-foil",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:838",
      "source": "term:pouch-cell",
      "target": "term:stacking",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:839",
      "source": "term:pouch-cell",
      "target": "term:swelling",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:840",
      "source": "term:pouch-cell",
      "target": "term:degassing",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:841",
      "source": "term:pouch-cell",
      "target": "term:prismatic-cell",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/pouch-cell/electrode",
      "source": "term:pouch-cell",
      "target": "term:electrode",
      "type": "mentions",
      "properties": {
        "sourceFile": "terms.json",
        "method": "build_glossary.mention_index + mentions",
        "field": "definition",
        "meaning": "Text mention; not a causal claim"
      }
    },
    {
      "id": "edge:843",
      "source": "term:pouch-cell",
      "target": "lesson:fundamentals/cell-production/",
      "type": "explainedIn",
      "properties": {
        "sourceFile": "terms.json",
        "url": "https://lemonergy.com/learn/fundamentals/cell-production/#formats"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-chemistries",
      "type": "Topic",
      "label": "Lithium-ion chemistries and cell formats",
      "properties": {
        "id": "topic-chemistries",
        "name": "Lithium-ion chemistries and cell formats",
        "lede": "The electrode materials that define a lithium-ion cell, the crystal structures behind them, and the shapes cells are built in.",
        "context": "Separate chemistry from form factor.",
        "example": "Two cylindrical cells can share dimensions yet differ in cathode, capacity and current limits.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/cell-architecture/",
        "lesson_label": "Open cell architecture"
      }
    },
    {
      "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"
        ]
      }
    },
    {
      "id": "term:stacking",
      "type": "Term",
      "label": "Stacking",
      "properties": {
        "id": "stacking",
        "name": "Stacking",
        "aka": [
          "Z-folding",
          "lamination"
        ],
        "section": "topic-manufacturing",
        "definition": "Building a cell from individual electrode sheets interleaved with separator, either sheet by sheet or by folding a continuous separator in a zigzag. It uses the volume of a rectangular case better than winding but is slower and more exacting.",
        "related": [
          "winding",
          "pouch-cell",
          "prismatic-cell",
          "notching"
        ],
        "lesson": "fundamentals/cell-production/#assembly",
        "url": "https://lemonergy.com/learn/glossary/stacking/",
        "mentions": [
          "electrode",
          "separator"
        ]
      }
    },
    {
      "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:degassing",
      "type": "Term",
      "label": "Degassing",
      "properties": {
        "id": "degassing",
        "name": "Degassing",
        "section": "topic-manufacturing",
        "definition": "Removing the gas a cell releases during formation. A pouch cell’s extra gas pocket is opened in a dry atmosphere, emptied and sealed off; large prismatic cells often vent through their fill opening before final sealing.",
        "related": [
          "formation",
          "gas-generation",
          "pouch-cell",
          "cell-finishing"
        ],
        "lesson": "fundamentals/cell-production/#finishing",
        "url": "https://lemonergy.com/learn/glossary/degassing/",
        "mentions": []
      }
    },
    {
      "id": "term:prismatic-cell",
      "type": "Term",
      "label": "Prismatic cell",
      "properties": {
        "id": "prismatic-cell",
        "name": "Prismatic cell",
        "section": "topic-chemistries",
        "definition": "A cell in a rigid rectangular metal case, holding either a flattened jelly roll or stacked sheets. Large prismatic cells pack tightly into battery packs.",
        "related": [
          "can",
          "jelly-roll",
          "stacking",
          "cylindrical-cell",
          "pouch-cell"
        ],
        "lesson": "fundamentals/cell-production/#formats",
        "example": {
          "title": "Geometry is one constraint",
          "text": "Two rectangular cells can fit similar spaces but use different terminals and electrical ratings."
        },
        "url": "https://lemonergy.com/learn/glossary/prismatic-cell/",
        "mentions": []
      }
    },
    {
      "id": "term:electrode",
      "type": "Term",
      "label": "Electrode",
      "properties": {
        "id": "electrode",
        "name": "Electrode",
        "section": "topic-components",
        "definition": "A solid conductor where the cell’s reaction happens, in contact with the electrolyte. A lithium-ion cell has a negative electrode and a positive electrode, each a porous coating on a metal foil.",
        "related": [
          "negative-electrode",
          "positive-electrode",
          "porous-electrode",
          "current-collector"
        ],
        "lesson": "fundamentals/cell-anatomy/#components",
        "example": {
          "title": "Two transport paths",
          "text": "Electrons need connected solid paths to the collector; ions need electrolyte paths to reaction sites. More of one constituent displaces others at fixed volume."
        },
        "url": "https://lemonergy.com/learn/glossary/electrode/",
        "mentions": [
          "electrolyte",
          "coating"
        ]
      }
    },
    {
      "id": "lesson:fundamentals/cell-production/",
      "type": "Lesson",
      "label": "Lesson 3 · Cell production",
      "properties": {
        "url": "https://lemonergy.com/learn/fundamentals/cell-production/"
      }
    }
  ]
}