{
  "node": {
    "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": []
    }
  },
  "edges": [
    {
      "id": "edge:2964",
      "source": "term:cell-to-pack",
      "target": "topic:topic-pack",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:2965",
      "source": "term:cell-to-pack",
      "target": "term:module",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:2966",
      "source": "term:cell-to-pack",
      "target": "term:cell-to-pack-ratio",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:2967",
      "source": "term:cell-to-pack",
      "target": "term:cell-to-chassis",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:2968",
      "source": "term:cell-to-pack",
      "target": "term:blade-cell",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:2969",
      "source": "term:cell-to-pack",
      "target": "term:ab-battery-system",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-pack",
      "type": "Topic",
      "label": "Modules, packs and battery management",
      "properties": {
        "id": "topic-pack",
        "name": "Modules, packs and battery management",
        "lede": "From a single cell to a working battery system, and the electronics that keep it safe.",
        "context": "Make series/parallel architecture explicit.",
        "example": "Twelve 3.6 V, 5 Ah cells in 6s2p give 21.6 V, 10 Ah and 216 Wh nominally before other restrictions.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/cell-architecture/",
        "lesson_label": "Open cell architecture"
      }
    },
    {
      "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:cell-to-pack-ratio",
      "type": "Term",
      "label": "Cell-to-pack ratio",
      "properties": {
        "id": "cell-to-pack-ratio",
        "name": "Cell-to-pack ratio",
        "aka": [
          "gravimetric cell-to-pack ratio",
          "GCTP"
        ],
        "section": "topic-ratings",
        "definition": "The share of a pack’s mass or volume that is cells rather than housing, cooling, busbars and electronics. It is typically 60–75 % by mass; raising it is the point of cell-to-pack and cell-to-chassis designs.",
        "unit": "%",
        "related": [
          "cell-to-pack",
          "specific-energy",
          "pack"
        ],
        "url": "https://lemonergy.com/learn/glossary/cell-to-pack-ratio/",
        "mentions": [
          "cell-to-chassis"
        ]
      }
    },
    {
      "id": "term:cell-to-chassis",
      "type": "Term",
      "label": "Cell-to-chassis",
      "properties": {
        "id": "cell-to-chassis",
        "name": "Cell-to-chassis",
        "abbr": "CTC",
        "aka": [
          "cell-to-body",
          "structural battery"
        ],
        "section": "topic-pack",
        "definition": "Integrating the cells into the vehicle floor itself, so the battery enclosure is the chassis and the cells help carry its loads. It saves mass and height but binds the battery to the car for life.",
        "related": [
          "cell-to-pack",
          "enclosure",
          "cell-to-pack-ratio"
        ],
        "url": "https://lemonergy.com/learn/glossary/cell-to-chassis/",
        "mentions": []
      }
    },
    {
      "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"
        ]
      }
    },
    {
      "id": "term:ab-battery-system",
      "type": "Term",
      "label": "AB battery system",
      "properties": {
        "id": "ab-battery-system",
        "name": "AB battery system",
        "aka": [
          "AB battery pack",
          "mixed-chemistry pack"
        ],
        "section": "topic-pack",
        "definition": "A pack that integrates two cell chemistries under one BMS — sodium-ion with lithium-ion, say, or LFP with NMC — so that one type covers the other’s weakness, such as poor cold-weather power or low energy density. CATL used the name at its 2021 sodium-ion launch; the BMS must model both voltage curves to estimate SOC.",
        "related": [
          "sodium-ion",
          "lfp",
          "nmc",
          "bms",
          "ocv-soc-curve",
          "pack"
        ],
        "url": "https://lemonergy.com/learn/glossary/ab-battery-system/",
        "mentions": [
          "energy-density",
          "state-of-charge"
        ]
      }
    }
  ]
}