{
  "node": {
    "id": "term:fmea",
    "type": "Term",
    "label": "Failure mode and effects analysis",
    "properties": {
      "id": "fmea",
      "name": "Failure mode and effects analysis",
      "abbr": "FMEA",
      "section": "topic-hvsafety",
      "definition": "A structured review that lists every way a component or process could fail, its effect, and how likely it is to happen and be detected, scoring each to prioritise fixes. Battery programmes run it on the cell, the pack design and the production process.",
      "related": [
        "functional-safety",
        "abuse-testing",
        "cell-design",
        "fault-tree-analysis"
      ],
      "url": "https://lemonergy.com/learn/glossary/fmea/",
      "mentions": []
    }
  },
  "edges": [
    {
      "id": "edge:2990",
      "source": "term:fmea",
      "target": "topic:topic-hvsafety",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:2991",
      "source": "term:fmea",
      "target": "term:functional-safety",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:2992",
      "source": "term:fmea",
      "target": "term:abuse-testing",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:2993",
      "source": "term:fmea",
      "target": "term:cell-design",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:2994",
      "source": "term:fmea",
      "target": "term:fault-tree-analysis",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-hvsafety",
      "type": "Topic",
      "label": "High-voltage and functional safety",
      "properties": {
        "id": "topic-hvsafety",
        "name": "High-voltage and functional safety",
        "lede": "Keeping people safe from the pack’s voltage and keeping its electronics safe when they fail: insulation, switching, fusing and the functional-safety process.",
        "context": "Relate protection to faults, detection and response.",
        "example": "Normal-operation current limits do not demonstrate correct contactor behavior under a welded-contact or sensor fault.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/battery-basics/",
        "lesson_label": "Open battery basics"
      }
    },
    {
      "id": "term:functional-safety",
      "type": "Term",
      "label": "Functional safety",
      "properties": {
        "id": "functional-safety",
        "name": "Functional safety",
        "abbr": "ISO 26262",
        "aka": [
          "ASIL"
        ],
        "section": "topic-hvsafety",
        "definition": "The discipline, standardised for vehicles in ISO 26262, of making sure electronic failures do not cause harm. Battery functions such as overvoltage protection are classified by risk into ASIL levels A to D, which set how redundant and verified their hardware and software must be.",
        "related": [
          "bms",
          "high-voltage-interlock",
          "insulation-resistance",
          "fmea",
          "mcu",
          "iso-13849"
        ],
        "url": "https://lemonergy.com/learn/glossary/functional-safety/",
        "mentions": []
      }
    },
    {
      "id": "term:abuse-testing",
      "type": "Term",
      "label": "Abuse testing",
      "properties": {
        "id": "abuse-testing",
        "name": "Abuse testing",
        "section": "topic-safety",
        "definition": "Deliberately driving cells and packs beyond their limits — overcharge, crush, nail penetration, external short, heating, drop — to see how they fail. Standards define each test and rank the outcome on a hazard scale from no effect to explosion.",
        "related": [
          "nail-penetration",
          "overcharge-test",
          "crush-test",
          "short-circuit-test",
          "hazard-level",
          "oven-test"
        ],
        "url": "https://lemonergy.com/learn/glossary/abuse-testing/",
        "mentions": [
          "overcharge"
        ]
      }
    },
    {
      "id": "term:cell-design",
      "type": "Term",
      "label": "Cell design",
      "properties": {
        "id": "cell-design",
        "name": "Cell design",
        "section": "topic-manufacturing",
        "definition": "Choosing the chemistry, electrode loadings, porosities, N/P ratio, separator, electrolyte volume and format that together meet an energy, power, life, safety and cost target. Each choice trades against the others: thicker electrodes raise energy and lower power.",
        "related": [
          "np-ratio",
          "areal-loading",
          "porosity",
          "energy-density",
          "specific-power"
        ],
        "url": "https://lemonergy.com/learn/glossary/cell-design/",
        "mentions": [
          "electrode",
          "separator",
          "electrolyte"
        ]
      }
    },
    {
      "id": "term:fault-tree-analysis",
      "type": "Term",
      "label": "Fault tree analysis",
      "properties": {
        "id": "fault-tree-analysis",
        "name": "Fault tree analysis",
        "abbr": "FTA",
        "section": "topic-safety",
        "definition": "A top-down safety analysis that starts from one undesired event, such as thermal runaway reaching the cabin, and breaks it into the combinations of failures that could cause it, linked by AND and OR gates. With failure rates attached it yields a probability; it complements the bottom-up FMEA and is standardised in IEC 61025.",
        "related": [
          "fmea",
          "functional-safety",
          "thermal-runaway",
          "hazard-level"
        ],
        "url": "https://lemonergy.com/learn/glossary/fault-tree-analysis/",
        "mentions": []
      }
    }
  ]
}