{
  "node": {
    "id": "term:blade-cell",
    "type": "Term",
    "label": "Blade cell",
    "properties": {
      "id": "blade-cell",
      "name": "Blade cell",
      "section": "topic-chemistries",
      "definition": "A very long, thin prismatic LFP cell, close to a metre in length, laid side by side so the cells themselves stiffen the pack. The format trades cell-level energy density for pack-level packing efficiency and a large cooling surface.",
      "related": [
        "prismatic-cell",
        "lfp",
        "cell-to-pack"
      ],
      "url": "https://lemonergy.com/learn/glossary/blade-cell/",
      "mentions": [
        "energy-density"
      ]
    }
  },
  "edges": [
    {
      "id": "edge:844",
      "source": "term:blade-cell",
      "target": "topic:topic-chemistries",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:845",
      "source": "term:blade-cell",
      "target": "term:prismatic-cell",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:846",
      "source": "term:blade-cell",
      "target": "term:lfp",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:847",
      "source": "term:blade-cell",
      "target": "term:cell-to-pack",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/blade-cell/energy-density",
      "source": "term:blade-cell",
      "target": "term:energy-density",
      "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-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: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:lfp",
      "type": "Term",
      "label": "LFP",
      "properties": {
        "id": "lfp",
        "name": "LFP",
        "aka": [
          "lithium iron phosphate",
          "LiFePO₄"
        ],
        "section": "topic-chemistries",
        "definition": "A positive electrode material, LiFePO₄, giving cells a nominal voltage around 3.2 V, long cycle life and good thermal stability, but less energy per kilogram than nickel-rich oxides. Its flat voltage curve makes state of charge hard to read from voltage alone.",
        "related": [
          "cathode-active-material",
          "nmc",
          "lmfp",
          "ocv-soc-curve",
          "cycle-life"
        ],
        "lesson": "fundamentals/cell-anatomy/#voltage",
        "example": {
          "title": "Chemistry is not the whole datasheet",
          "text": "Two LFP products can differ in format, loading, capacity and current limits. Their cathode family alone does not make them interchangeable."
        },
        "url": "https://lemonergy.com/learn/glossary/lfp/",
        "mentions": [
          "electrode",
          "positive-electrode",
          "nominal-voltage",
          "discharge-curve",
          "state-of-charge"
        ]
      }
    },
    {
      "id": "term:cell-to-pack",
      "type": "Term",
      "label": "Cell-to-pack",
      "properties": {
        "id": "cell-to-pack",
        "name": "Cell-to-pack",
        "abbr": "CTP",
        "section": "topic-pack",
        "definition": "Building the pack directly from cells without the intermediate module, using large-format cells that bear load themselves. It raises the cell-to-pack ratio and cuts parts, at the cost of making the pack harder to service.",
        "related": [
          "module",
          "cell-to-pack-ratio",
          "cell-to-chassis",
          "blade-cell",
          "ab-battery-system"
        ],
        "url": "https://lemonergy.com/learn/glossary/cell-to-pack/",
        "mentions": []
      }
    },
    {
      "id": "term:energy-density",
      "type": "Term",
      "label": "Energy density",
      "properties": {
        "id": "energy-density",
        "name": "Energy density",
        "aka": [
          "volumetric energy density"
        ],
        "section": "topic-ratings",
        "definition": "Stored energy per unit volume, in watt-hours per litre. It is the figure that matters when space is the constraint, as in a phone or under a car floor; high-energy cylindrical cells pass 700 Wh/L.",
        "unit": "Wh/L",
        "related": [
          "specific-energy",
          "nominal-energy",
          "ragone-plot",
          "areal-loading"
        ],
        "lesson": "fundamentals/capacity-and-c-rate/#energy",
        "url": "https://lemonergy.com/learn/glossary/energy-density/",
        "mentions": []
      }
    }
  ]
}