{
  "node": {
    "id": "term:iec-62620",
    "type": "Term",
    "label": "IEC 62620",
    "properties": {
      "id": "iec-62620",
      "name": "IEC 62620",
      "section": "topic-standards-stationary",
      "definition": "The performance standard for industrial lithium cells and batteries: how to measure and declare capacity, endurance, internal resistance and self-discharge, so that datasheets from different makers can be compared.",
      "related": [
        "iec-62619",
        "datasheet",
        "capacity-test",
        "cycle-life"
      ],
      "url": "https://lemonergy.com/learn/glossary/iec-62620/",
      "mentions": [
        "internal-resistance",
        "self-discharge"
      ]
    }
  },
  "edges": [
    {
      "id": "edge:3766",
      "source": "term:iec-62620",
      "target": "topic:topic-standards-stationary",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:3767",
      "source": "term:iec-62620",
      "target": "term:iec-62619",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3768",
      "source": "term:iec-62620",
      "target": "term:datasheet",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3769",
      "source": "term:iec-62620",
      "target": "term:capacity-test",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3770",
      "source": "term:iec-62620",
      "target": "term:cycle-life",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/iec-62620/internal-resistance",
      "source": "term:iec-62620",
      "target": "term:internal-resistance",
      "type": "mentions",
      "properties": {
        "sourceFile": "terms.json",
        "method": "build_glossary.mention_index + mentions",
        "field": "definition",
        "meaning": "Text mention; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/iec-62620/self-discharge",
      "source": "term:iec-62620",
      "target": "term:self-discharge",
      "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-standards-stationary",
      "type": "Topic",
      "label": "Stationary, industrial and product standards",
      "properties": {
        "id": "topic-standards-stationary",
        "name": "Stationary, industrial and product standards",
        "lede": "Safety and performance standards for portable, industrial and grid batteries, their electronics and their installation.",
        "context": "Match scope to product and installation.",
        "example": "A cell-level test does not establish fire performance or commissioning requirements for a complete installation.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/battery-basics/",
        "lesson_label": "Open battery basics"
      }
    },
    {
      "id": "term:iec-62619",
      "type": "Term",
      "label": "IEC 62619",
      "properties": {
        "id": "iec-62619",
        "name": "IEC 62619",
        "section": "topic-standards-stationary",
        "definition": "The safety standard for secondary lithium cells and batteries in industrial applications — stationary storage, forklifts, rail and marine — covering cell abuse tests plus battery-system functions such as overcharge and thermal control. It is the industrial counterpart of IEC 62133 for portable and IEC 62660 for vehicles.",
        "related": [
          "iec-62133",
          "iec-62660",
          "stationary-storage",
          "conformity-assessment",
          "iec-63056",
          "en-62040-1"
        ],
        "url": "https://lemonergy.com/learn/glossary/iec-62619/",
        "mentions": [
          "overcharge"
        ]
      }
    },
    {
      "id": "term:datasheet",
      "type": "Term",
      "label": "Datasheet",
      "properties": {
        "id": "datasheet",
        "name": "Datasheet",
        "section": "topic-ratings",
        "definition": "The manufacturer’s specification sheet for a cell: nominal capacity, nominal voltage, voltage window, continuous and peak currents, operating temperatures, dimensions, mass and cycle life, each tied to the test conditions it was measured under.",
        "related": [
          "nominal-capacity",
          "nominal-voltage",
          "operating-temperature",
          "cycle-life",
          "iec-62620"
        ],
        "lesson": "fundamentals/battery-basics/#datasheet",
        "url": "https://lemonergy.com/learn/glossary/datasheet/",
        "mentions": [
          "voltage-window"
        ]
      }
    },
    {
      "id": "term:capacity-test",
      "type": "Term",
      "label": "Capacity test",
      "properties": {
        "id": "capacity-test",
        "name": "Capacity test",
        "section": "topic-testing",
        "definition": "A defined capacity test with specified charge, rest, discharge and cutoff conditions, usually a full CC-CV charge, a rest, and a C/3 or lower discharge to the lower cutoff at 25 °C. The delivered ampere-hours are the cell’s measured capacity.",
        "related": [
          "nominal-capacity",
          "cc-cv-charging",
          "cutoff-voltage",
          "reference-performance-test",
          "rate-test"
        ],
        "lesson": "fundamentals/capacity-and-c-rate/#nominal-capacity",
        "url": "https://lemonergy.com/learn/glossary/capacity-test/",
        "mentions": []
      }
    },
    {
      "id": "term:cycle-life",
      "type": "Term",
      "label": "Cycle life",
      "properties": {
        "id": "cycle-life",
        "name": "Cycle life",
        "section": "topic-ratings",
        "definition": "The number of full charge–discharge cycles a cell completes before its capacity falls to a stated fraction, usually 80 %, of its initial value under defined conditions. LFP cells reach several thousand cycles; high-energy NMC fewer.",
        "unit": "cycles",
        "related": [
          "end-of-life",
          "capacity-fade",
          "depth-of-discharge",
          "calendar-life",
          "equivalent-full-cycle",
          "cycle-life-test"
        ],
        "url": "https://lemonergy.com/learn/glossary/cycle-life/",
        "mentions": []
      }
    },
    {
      "id": "term:internal-resistance",
      "type": "Term",
      "label": "Internal resistance",
      "properties": {
        "id": "internal-resistance",
        "name": "Internal resistance",
        "abbr": "IR",
        "aka": [
          "DC resistance",
          "DCIR"
        ],
        "section": "topic-units",
        "definition": "The resistance a cell presents to current, from its foils, electrolyte, interfaces and the reactions themselves. It converts part of the delivered energy into heat, sets the voltage drop under load, and rises as the cell ages; a large automotive cell has about a milliohm, a small cylindrical cell tens.",
        "unit": "mΩ",
        "related": [
          "ohms-law",
          "ir-drop",
          "impedance-rise",
          "dcir",
          "area-specific-resistance",
          "resistance-capacity-product"
        ],
        "lesson": "fundamentals/battery-basics/#datasheet",
        "url": "https://lemonergy.com/learn/glossary/internal-resistance/",
        "mentions": [
          "electrolyte",
          "cylindrical-cell"
        ]
      }
    },
    {
      "id": "term:self-discharge",
      "type": "Term",
      "label": "Self-discharge",
      "properties": {
        "id": "self-discharge",
        "name": "Self-discharge",
        "section": "topic-charging",
        "definition": "The slow loss of stored charge while a cell is not in use. An unexpected rise can signal a leakage path or a soft internal short.",
        "unit": "%/month",
        "related": [
          "internal-short-circuit",
          "calendar-aging",
          "k-value",
          "calendar-life",
          "self-discharge-test"
        ],
        "lesson": "fundamentals/battery-aging/#check-yourself",
        "url": "https://lemonergy.com/learn/glossary/self-discharge/",
        "mentions": []
      }
    }
  ]
}