{
  "node": {
    "id": "term:warranty",
    "type": "Term",
    "label": "Battery warranty",
    "properties": {
      "id": "warranty",
      "name": "Battery warranty",
      "section": "topic-applications",
      "definition": "The manufacturer’s guarantee of capacity retention over time, for electric cars typically 70 % after 8 years or 160 000 km. It is written against state of health as the BMS reports it, which makes the SOH algorithm a contractual matter.",
      "related": [
        "state-of-health",
        "end-of-life",
        "calendar-life",
        "cycle-life",
        "throughput-limiting"
      ],
      "url": "https://lemonergy.com/learn/glossary/warranty/",
      "mentions": [
        "bms",
        "state-of-capacity"
      ]
    }
  },
  "edges": [
    {
      "id": "edge:3203",
      "source": "term:warranty",
      "target": "topic:topic-applications",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:3204",
      "source": "term:warranty",
      "target": "term:state-of-health",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3205",
      "source": "term:warranty",
      "target": "term:end-of-life",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3206",
      "source": "term:warranty",
      "target": "term:calendar-life",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3207",
      "source": "term:warranty",
      "target": "term:cycle-life",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3208",
      "source": "term:warranty",
      "target": "term:throughput-limiting",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/warranty/bms",
      "source": "term:warranty",
      "target": "term:bms",
      "type": "mentions",
      "properties": {
        "sourceFile": "terms.json",
        "method": "build_glossary.mention_index + mentions",
        "field": "definition",
        "meaning": "Text mention; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/warranty/state-of-capacity",
      "source": "term:warranty",
      "target": "term:state-of-capacity",
      "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-applications",
      "type": "Topic",
      "label": "Applications and market",
      "properties": {
        "id": "topic-applications",
        "name": "Applications and market",
        "lede": "Where batteries are used, and the terms used to buy, size and compare them.",
        "context": "Start with mission energy, peak power and operating conditions.",
        "example": "20 kWh total energy and a ten-second 100 kW peak constrain different design aspects.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/capacity-and-c-rate/",
        "lesson_label": "Open energy and power"
      }
    },
    {
      "id": "term:state-of-health",
      "type": "Term",
      "label": "State of health",
      "properties": {
        "id": "state-of-health",
        "name": "State of health",
        "abbr": "SOH",
        "section": "topic-state",
        "definition": "A summary of how far a cell has aged, often expressed through remaining capacity or increased resistance compared with when it was new. By convention a cell has reached end of life at 80 % of its rated capacity.",
        "unit": "%",
        "related": [
          "capacity-fade",
          "impedance-rise",
          "end-of-life",
          "remaining-useful-life",
          "state-of-charge",
          "state-of-certified-energy"
        ],
        "lesson": "fundamentals/capacity-and-c-rate/#real-cells",
        "url": "https://lemonergy.com/learn/glossary/state-of-health/",
        "mentions": [
          "nominal-capacity"
        ]
      }
    },
    {
      "id": "term:end-of-life",
      "type": "Term",
      "label": "End of life",
      "properties": {
        "id": "end-of-life",
        "name": "End of life",
        "abbr": "EOL",
        "section": "topic-state",
        "definition": "The point at which a cell no longer meets its application’s requirement, conventionally 80 % of initial capacity or a doubling of resistance. It is a definition for warranties and tests, not a point where the cell stops working.",
        "related": [
          "state-of-health",
          "beginning-of-life",
          "cycle-life",
          "second-life",
          "knee-point"
        ],
        "url": "https://lemonergy.com/learn/glossary/end-of-life/",
        "mentions": []
      }
    },
    {
      "id": "term:calendar-life",
      "type": "Term",
      "label": "Calendar life",
      "properties": {
        "id": "calendar-life",
        "name": "Calendar life",
        "aka": [
          "shelf life"
        ],
        "section": "topic-ratings",
        "definition": "How long a cell lasts in years, regardless of cycling, before it reaches its end-of-life criterion. It is set by calendar aging, which runs fastest at high temperature and high state of charge.",
        "unit": "years",
        "related": [
          "calendar-aging",
          "cycle-life",
          "end-of-life",
          "self-discharge",
          "calendar-life-test"
        ],
        "url": "https://lemonergy.com/learn/glossary/calendar-life/",
        "mentions": [
          "state-of-charge"
        ]
      }
    },
    {
      "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:throughput-limiting",
      "type": "Term",
      "label": "Throughput limiting",
      "properties": {
        "id": "throughput-limiting",
        "name": "Throughput limiting",
        "aka": [
          "cycle limiting",
          "throughput cap"
        ],
        "section": "topic-applications",
        "definition": "Capping the energy a battery cycles per day or year so that lifetime throughput stays within the warranty allowance and degradation stays on plan. Grid-storage warranties are often written around one equivalent full cycle per day, so the energy management system weighs every extra megawatt-hour traded against the life it consumes.",
        "related": [
          "warranty",
          "equivalent-full-cycle",
          "energy-management-system",
          "cycle-aging",
          "levelized-cost-of-storage"
        ],
        "url": "https://lemonergy.com/learn/glossary/throughput-limiting/",
        "mentions": [
          "energy-throughput"
        ]
      }
    },
    {
      "id": "term:bms",
      "type": "Term",
      "label": "Battery management system",
      "properties": {
        "id": "bms",
        "name": "Battery management system",
        "abbr": "BMS",
        "section": "topic-pack",
        "definition": "The electronics and software that keep a battery inside its safe window: measuring every cell voltage and many temperatures, estimating SOC and SOH, balancing cells, computing current limits, controlling the contactors and reporting over the vehicle network.",
        "related": [
          "state-of-charge",
          "cell-balancing",
          "state-of-power",
          "cell-supervision-circuit",
          "contactor",
          "can-bus"
        ],
        "lesson": "fundamentals/battery-basics/#cell-module-pack",
        "url": "https://lemonergy.com/learn/glossary/bms/",
        "mentions": [
          "state-of-health",
          "cell-voltage"
        ]
      }
    },
    {
      "id": "term:state-of-capacity",
      "type": "Term",
      "label": "State of capacity",
      "properties": {
        "id": "state-of-capacity",
        "name": "State of capacity",
        "abbr": "SoQ",
        "aka": [
          "SOH-C",
          "capacity retention"
        ],
        "section": "topic-state",
        "definition": "The charge a cell or pack can still hold, as a percentage of its rated or beginning-of-life capacity: the capacity half of state of health. A cell measured at 82 Ah against a 100 Ah rating has an SoQ of 82 %, and the usual 80 % end-of-life convention is written against it.",
        "formula": "SoQ = Q_now / Q_rated × 100 %",
        "unit": "%",
        "related": [
          "state-of-health",
          "capacity-fade",
          "state-of-resistance",
          "nominal-capacity",
          "end-of-life"
        ],
        "example": {
          "title": "Compare current and reference capacity",
          "text": "If present available capacity is 45 Ah and the selected rated reference is 50 Ah, SoQ is 90%. The reference temperature, current and voltage window belong with the number."
        },
        "url": "https://lemonergy.com/learn/glossary/state-of-capacity/",
        "mentions": []
      }
    }
  ]
}