{
  "node": {
    "id": "term:cell",
    "type": "Term",
    "label": "Cell",
    "properties": {
      "id": "cell",
      "name": "Cell",
      "section": "topic-components",
      "definition": "The smallest complete electrochemical unit: two electrodes, a separator and electrolyte in one sealed case, with two terminals. Everything larger — module, pack, system — is cells connected together.",
      "related": [
        "module",
        "pack",
        "electrode",
        "cylindrical-cell",
        "pouch-cell",
        "prismatic-cell"
      ],
      "lesson": "fundamentals/battery-basics/#cell-module-pack",
      "example": {
        "title": "Cell versus pack",
        "text": "Six identical cells in series add their voltages, but do not multiply ampere-hour capacity."
      },
      "url": "https://lemonergy.com/learn/glossary/cell/",
      "mentions": [
        "separator",
        "electrolyte"
      ]
    }
  },
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      "source": "term:cell",
      "target": "topic:topic-components",
      "type": "belongsTo",
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      }
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    {
      "id": "edge:309",
      "source": "term:cell",
      "target": "term:module",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:310",
      "source": "term:cell",
      "target": "term:pack",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:311",
      "source": "term:cell",
      "target": "term:electrode",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:312",
      "source": "term:cell",
      "target": "term:cylindrical-cell",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:313",
      "source": "term:cell",
      "target": "term:pouch-cell",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:314",
      "source": "term:cell",
      "target": "term:prismatic-cell",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/cell/separator",
      "source": "term:cell",
      "target": "term:separator",
      "type": "mentions",
      "properties": {
        "sourceFile": "terms.json",
        "method": "build_glossary.mention_index + mentions",
        "field": "definition",
        "meaning": "Text mention; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/cell/electrolyte",
      "source": "term:cell",
      "target": "term:electrolyte",
      "type": "mentions",
      "properties": {
        "sourceFile": "terms.json",
        "method": "build_glossary.mention_index + mentions",
        "field": "definition",
        "meaning": "Text mention; not a causal claim"
      }
    },
    {
      "id": "edge:317",
      "source": "term:cell",
      "target": "lesson:fundamentals/battery-basics/",
      "type": "explainedIn",
      "properties": {
        "sourceFile": "terms.json",
        "url": "https://lemonergy.com/learn/fundamentals/battery-basics/#cell-module-pack"
      }
    }
  ],
  "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:module",
      "type": "Term",
      "label": "Module",
      "properties": {
        "id": "module",
        "name": "Module",
        "section": "topic-pack",
        "definition": "A group of cells connected in series and parallel, mechanically held together with its own voltage and temperature sensing, built as the unit from which a pack is assembled and serviced. Cell-to-pack designs do away with it.",
        "related": [
          "cell",
          "pack",
          "series-parallel",
          "cell-to-pack",
          "cell-supervision-circuit"
        ],
        "lesson": "fundamentals/battery-basics/#cell-module-pack",
        "url": "https://lemonergy.com/learn/glossary/module/",
        "mentions": []
      }
    },
    {
      "id": "term:pack",
      "type": "Term",
      "label": "Battery pack",
      "properties": {
        "id": "pack",
        "name": "Battery pack",
        "section": "topic-pack",
        "definition": "The complete battery as installed: modules or cells, the BMS, contactors and fuses, busbars, cooling, sensors and an enclosure. Its energy is the sum of its cells’ energies; its mass and volume are a good deal more.",
        "related": [
          "module",
          "bms",
          "battery-disconnect-unit",
          "thermal-management",
          "cell-to-pack-ratio",
          "enclosure"
        ],
        "lesson": "fundamentals/battery-basics/#cell-module-pack",
        "url": "https://lemonergy.com/learn/glossary/pack/",
        "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": "term:cylindrical-cell",
      "type": "Term",
      "label": "Cylindrical cell",
      "properties": {
        "id": "cylindrical-cell",
        "name": "Cylindrical cell",
        "aka": [
          "18650",
          "21700",
          "4680"
        ],
        "section": "topic-chemistries",
        "definition": "A cell made by winding the electrodes into a jelly roll and sealing it in a round metal can. Sizes are named by their dimensions: a 21700 cell is 21 mm across and 70 mm long.",
        "related": [
          "jelly-roll",
          "can",
          "tabless-design",
          "prismatic-cell",
          "pouch-cell",
          "centre-pin"
        ],
        "lesson": "fundamentals/cell-production/#formats",
        "example": {
          "title": "Shape versus ratings",
          "text": "A cylindrical shape does not supply the model’s capacity, resistance or voltage limits; those belong to the actual cell."
        },
        "url": "https://lemonergy.com/learn/glossary/cylindrical-cell/",
        "mentions": [
          "winding"
        ]
      }
    },
    {
      "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: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:separator",
      "type": "Term",
      "label": "Separator",
      "properties": {
        "id": "separator",
        "name": "Separator",
        "section": "topic-electrolytes",
        "definition": "A porous, electronically insulating film between the electrodes. Electrons cannot cross it; ions move through the electrolyte in its pores.",
        "related": [
          "electrolyte",
          "ceramic-coated-separator",
          "separator-shutdown",
          "internal-short-circuit",
          "porosity"
        ],
        "lesson": "fundamentals/cell-architecture/#separator",
        "example": {
          "title": "Different conduction paths",
          "text": "A separator prevents direct electronic contact while permitting ionic transport through its electrolyte-filled structure."
        },
        "url": "https://lemonergy.com/learn/glossary/separator/",
        "mentions": []
      }
    },
    {
      "id": "term:electrolyte",
      "type": "Term",
      "label": "Electrolyte",
      "properties": {
        "id": "electrolyte",
        "name": "Electrolyte",
        "section": "topic-electrolytes",
        "definition": "The ion-conducting medium between the electrodes. In a liquid-electrolyte cell it fills the pores of both electrodes and the separator, so it is not a separate structural layer.",
        "related": [
          "lithium-salt",
          "carbonate-solvent",
          "electrolyte-additive",
          "ionic-conductivity",
          "solid-electrolyte",
          "ionic-liquid-electrolyte"
        ],
        "lesson": "fundamentals/cell-architecture/#electrolyte",
        "example": {
          "title": "Ions and electrons",
          "text": "Electrolyte carries ions between electrodes; the external circuit carries electrons. The two paths serve different roles."
        },
        "url": "https://lemonergy.com/learn/glossary/electrolyte/",
        "mentions": [
          "separator"
        ]
      }
    },
    {
      "id": "lesson:fundamentals/battery-basics/",
      "type": "Lesson",
      "label": "Lesson 0 · Battery basics",
      "properties": {
        "url": "https://lemonergy.com/learn/fundamentals/battery-basics/"
      }
    }
  ]
}