{
  "node": {
    "id": "term:intumescent-material",
    "type": "Term",
    "label": "Intumescent material",
    "properties": {
      "id": "intumescent-material",
      "name": "Intumescent material",
      "aka": [
        "intumescent coating",
        "intumescent pad"
      ],
      "section": "topic-safety",
      "definition": "A material that swells to many times its original thickness when heated, forming a porous char that insulates whatever lies beneath. Applied as coatings on pack lids or as pads between cells, it stays thin in normal service and expands only during a thermal event, which suits the tight spaces inside a battery.",
      "related": [
        "thermal-barrier",
        "thermal-propagation",
        "aerogel",
        "enclosure"
      ],
      "url": "https://lemonergy.com/learn/glossary/intumescent-material/",
      "mentions": []
    }
  },
  "edges": [
    {
      "id": "edge:6662",
      "source": "term:intumescent-material",
      "target": "topic:topic-safety",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:6663",
      "source": "term:intumescent-material",
      "target": "term:thermal-barrier",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:6664",
      "source": "term:intumescent-material",
      "target": "term:thermal-propagation",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:6665",
      "source": "term:intumescent-material",
      "target": "term:aerogel",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:6666",
      "source": "term:intumescent-material",
      "target": "term:enclosure",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-safety",
      "type": "Topic",
      "label": "Safety and abuse",
      "properties": {
        "id": "topic-safety",
        "name": "Safety and abuse",
        "lede": "How cells fail dangerously, how that is tested, and what is built in to stop it.",
        "context": "Connect mechanisms with appropriate test evidence.",
        "example": "A low normal-load temperature does not demonstrate thermal-runaway containment.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/battery-aging/",
        "lesson_label": "Open degradation mechanisms"
      }
    },
    {
      "id": "term:thermal-barrier",
      "type": "Term",
      "label": "Thermal barrier",
      "properties": {
        "id": "thermal-barrier",
        "name": "Thermal barrier",
        "aka": [
          "fire-resistant pad",
          "mica sheet"
        ],
        "section": "topic-safety",
        "definition": "An insulating sheet — aerogel, mica, ceramic fibre or intumescent material — placed between cells or modules to slow heat transfer during a thermal event and buy time for occupants to leave.",
        "related": [
          "thermal-propagation",
          "compression-pad",
          "module"
        ],
        "url": "https://lemonergy.com/learn/glossary/thermal-barrier/",
        "mentions": [
          "aerogel",
          "intumescent-material"
        ]
      }
    },
    {
      "id": "term:thermal-propagation",
      "type": "Term",
      "label": "Thermal propagation",
      "properties": {
        "id": "thermal-propagation",
        "name": "Thermal propagation",
        "section": "topic-safety",
        "definition": "Thermal runaway spreading from one cell to its neighbours through conducted heat, hot gas and flame. Pack designs are judged by whether, and how slowly, a single failing cell takes the rest with it.",
        "related": [
          "thermal-runaway",
          "thermal-barrier",
          "venting",
          "module",
          "propagation-test"
        ],
        "url": "https://lemonergy.com/learn/glossary/thermal-propagation/",
        "mentions": []
      }
    },
    {
      "id": "term:aerogel",
      "type": "Term",
      "label": "Aerogel",
      "properties": {
        "id": "aerogel",
        "name": "Aerogel",
        "aka": [
          "silica aerogel",
          "aerogel sheet"
        ],
        "section": "topic-safety",
        "definition": "A solid foam, usually of silica, that is mostly air held in nanometre-scale pores, giving a thermal conductivity of only about 0.015–0.02 W/(m·K). Sheets a millimetre or two thick between cells slow heat transfer during a thermal event, though they must keep their insulation under the compression of swelling cells.",
        "related": [
          "thermal-barrier",
          "thermal-propagation",
          "compression-pad",
          "intumescent-material"
        ],
        "url": "https://lemonergy.com/learn/glossary/aerogel/",
        "mentions": [
          "swelling",
          "thermal-conductivity"
        ]
      }
    },
    {
      "id": "term:enclosure",
      "type": "Term",
      "label": "Enclosure",
      "properties": {
        "id": "enclosure",
        "name": "Enclosure",
        "aka": [
          "battery housing",
          "battery tray"
        ],
        "section": "topic-pack",
        "definition": "The sealed case that carries the modules, protects them in a crash, keeps water out to an IP67 rating or better and vents gas in a thermal event. In many cars it is a structural part of the body.",
        "related": [
          "pack",
          "ip-rating",
          "cell-to-chassis",
          "venting",
          "gigacasting",
          "ul-94"
        ],
        "url": "https://lemonergy.com/learn/glossary/enclosure/",
        "mentions": []
      }
    }
  ]
}