{
  "node": {
    "id": "term:insulation-test",
    "type": "Term",
    "label": "Insulation resistance test",
    "properties": {
      "id": "insulation-test",
      "name": "Insulation resistance test",
      "aka": [
        "hipot test",
        "dielectric strength test"
      ],
      "section": "topic-testing",
      "definition": "Applying a high DC or AC voltage between the high-voltage circuit and the chassis or housing to verify that insulation holds, with the leakage current below a limit. It is done on every pack at end of line and after abuse tests in R100.",
      "related": [
        "insulation-resistance",
        "un-r100-part-2",
        "high-voltage-interlock",
        "end-of-line-testing"
      ],
      "url": "https://lemonergy.com/learn/glossary/insulation-test/",
      "mentions": [
        "un-r100"
      ]
    }
  },
  "edges": [
    {
      "id": "edge:3964",
      "source": "term:insulation-test",
      "target": "topic:topic-testing",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:3965",
      "source": "term:insulation-test",
      "target": "term:insulation-resistance",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3966",
      "source": "term:insulation-test",
      "target": "term:un-r100-part-2",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3967",
      "source": "term:insulation-test",
      "target": "term:high-voltage-interlock",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3968",
      "source": "term:insulation-test",
      "target": "term:end-of-line-testing",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/insulation-test/un-r100",
      "source": "term:insulation-test",
      "target": "term:un-r100",
      "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-testing",
      "type": "Topic",
      "label": "Testing methods",
      "properties": {
        "id": "topic-testing",
        "name": "Testing methods",
        "lede": "The measurements and test procedures that characterise a cell or pack, from capacity and pulse tests to abuse and environmental tests.",
        "context": "Record specimen, state, instrument, temperature and timing.",
        "example": "Resistance immediately after a current step can differ from a ten-second value because slower polarization contributes.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/capacity-and-c-rate/",
        "lesson_label": "Open capacity measurements"
      }
    },
    {
      "id": "term:insulation-resistance",
      "type": "Term",
      "label": "Insulation resistance",
      "properties": {
        "id": "insulation-resistance",
        "name": "Insulation resistance",
        "aka": [
          "isolation resistance",
          "IMD"
        ],
        "section": "topic-hvsafety",
        "definition": "The resistance between the high-voltage circuit and the vehicle chassis, which must stay above about 100 Ω per volt of pack voltage so a person touching the chassis is safe. An insulation monitoring device measures it continuously.",
        "unit": "Ω/V",
        "related": [
          "pack-voltage",
          "high-voltage-interlock",
          "functional-safety",
          "insulation-test"
        ],
        "url": "https://lemonergy.com/learn/glossary/insulation-resistance/",
        "mentions": [
          "volt"
        ]
      }
    },
    {
      "id": "term:un-r100-part-2",
      "type": "Term",
      "label": "R100 Part II",
      "properties": {
        "id": "un-r100-part-2",
        "name": "R100 Part II",
        "aka": [
          "REESS tests",
          "R100 Annex 8"
        ],
        "section": "topic-standards-vehicle",
        "definition": "The part of UN R100 that tests the battery system as a unit: vibration, thermal shock and cycling, mechanical shock and crash impact, fire resistance, external short circuit, overcharge and over-discharge protection, over-temperature protection and, from the 03 series, thermal propagation. Each test ends with a check that there is no fire, explosion, electrolyte leakage or loss of isolation.",
        "related": [
          "un-r100",
          "un-r100-03",
          "abuse-testing",
          "propagation-test",
          "insulation-resistance"
        ],
        "url": "https://lemonergy.com/learn/glossary/un-r100-part-2/",
        "mentions": [
          "electrolyte",
          "overcharge",
          "over-discharge",
          "thermal-propagation",
          "external-short-circuit",
          "short-circuit"
        ]
      }
    },
    {
      "id": "term:high-voltage-interlock",
      "type": "Term",
      "label": "High-voltage interlock loop",
      "properties": {
        "id": "high-voltage-interlock",
        "name": "High-voltage interlock loop",
        "abbr": "HVIL",
        "section": "topic-hvsafety",
        "definition": "A low-voltage signal loop threaded through every high-voltage connector and cover. Opening any of them breaks the loop and the BMS drops the contactors, so a technician cannot reach a live conductor.",
        "related": [
          "contactor",
          "pack-voltage",
          "insulation-resistance",
          "functional-safety"
        ],
        "url": "https://lemonergy.com/learn/glossary/high-voltage-interlock/",
        "mentions": [
          "bms"
        ]
      }
    },
    {
      "id": "term:end-of-line-testing",
      "type": "Term",
      "label": "End-of-line testing",
      "properties": {
        "id": "end-of-line-testing",
        "name": "End-of-line testing",
        "abbr": "EOL test",
        "section": "topic-manufacturing",
        "definition": "The final measurements on every finished cell — capacity, internal resistance and open-circuit voltage — used to reject faulty cells and sort good ones into matched grades.",
        "related": [
          "grading",
          "capacity-test",
          "k-value",
          "cell-finishing"
        ],
        "lesson": "fundamentals/cell-production/#finishing",
        "url": "https://lemonergy.com/learn/glossary/end-of-line-testing/",
        "mentions": [
          "internal-resistance",
          "open-circuit-voltage"
        ]
      }
    },
    {
      "id": "term:un-r100",
      "type": "Term",
      "label": "UN Regulation No. 100",
      "properties": {
        "id": "un-r100",
        "name": "UN Regulation No. 100",
        "abbr": "R100",
        "aka": [
          "ECE R100",
          "UN ECE R100"
        ],
        "section": "topic-standards-vehicle",
        "definition": "The UNECE type-approval regulation for the electric powertrain of cars, buses and trucks, covering protection against electric shock and, in part II, the rechargeable energy storage system itself. A vehicle sold in the EU and most of the world must carry an R100 approval for its battery.",
        "related": [
          "un-r100-part-2",
          "un-r100-03",
          "gtr-20",
          "rechargeable-energy-storage-system",
          "insulation-resistance",
          "high-voltage-interlock"
        ],
        "url": "https://lemonergy.com/learn/glossary/un-r100/",
        "mentions": []
      }
    }
  ]
}