{
  "node": {
    "id": "term:maritime-battery",
    "type": "Term",
    "label": "Maritime battery systems",
    "properties": {
      "id": "maritime-battery",
      "name": "Maritime battery systems",
      "aka": [
        "marine battery",
        "ship battery",
        "electric ferry"
      ],
      "section": "topic-applications",
      "definition": "Batteries for ships: all-electric ferries on short crossings, and hybrid propulsion that lets vessels run engines at their best load or sit emission-free in port. Norway’s first all-electric car ferry, in service since 2015, uses about 150–200 kWh per crossing. Classification societies such as DNV set rules for fire safety, ventilation and gas detection in battery rooms.",
      "related": [
        "gas-detection",
        "fire-suppression",
        "thermal-propagation",
        "hybrid-vehicle",
        "opportunity-charging"
      ],
      "url": "https://lemonergy.com/learn/glossary/maritime-battery/",
      "mentions": [
        "kilowatt-hour"
      ]
    }
  },
  "edges": [
    {
      "id": "edge:6901",
      "source": "term:maritime-battery",
      "target": "topic:topic-applications",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:6902",
      "source": "term:maritime-battery",
      "target": "term:gas-detection",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:6903",
      "source": "term:maritime-battery",
      "target": "term:fire-suppression",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:6904",
      "source": "term:maritime-battery",
      "target": "term:thermal-propagation",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:6905",
      "source": "term:maritime-battery",
      "target": "term:hybrid-vehicle",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:6906",
      "source": "term:maritime-battery",
      "target": "term:opportunity-charging",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/maritime-battery/kilowatt-hour",
      "source": "term:maritime-battery",
      "target": "term:kilowatt-hour",
      "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:gas-detection",
      "type": "Term",
      "label": "Gas detection",
      "properties": {
        "id": "gas-detection",
        "name": "Gas detection",
        "aka": [
          "off-gas detection"
        ],
        "section": "topic-safety",
        "definition": "Sensors in a pack or storage container that detect electrolyte vapour or hydrogen released before thermal runaway. Off-gas appears minutes before heat and smoke, which makes it the earliest practical warning.",
        "related": [
          "off-gas",
          "venting",
          "fire-suppression",
          "bms",
          "early-thermal-runaway-detection"
        ],
        "url": "https://lemonergy.com/learn/glossary/gas-detection/",
        "mentions": [
          "electrolyte",
          "thermal-runaway"
        ]
      }
    },
    {
      "id": "term:fire-suppression",
      "type": "Term",
      "label": "Fire suppression",
      "properties": {
        "id": "fire-suppression",
        "name": "Fire suppression",
        "section": "topic-safety",
        "definition": "Systems that cool or smother a battery fire: water mist and flooding for cooling, inert gas or aerosol for enclosed storage containers. Because the cell makes its own oxygen, suppression mainly limits spread and cools neighbours rather than extinguishing the failing cell.",
        "related": [
          "flammability",
          "thermal-propagation",
          "gas-detection",
          "stationary-storage",
          "firefighter-access"
        ],
        "url": "https://lemonergy.com/learn/glossary/fire-suppression/",
        "mentions": []
      }
    },
    {
      "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:hybrid-vehicle",
      "type": "Term",
      "label": "Hybrid and plug-in hybrid vehicle",
      "properties": {
        "id": "hybrid-vehicle",
        "name": "Hybrid and plug-in hybrid vehicle",
        "abbr": "HEV, PHEV",
        "section": "topic-applications",
        "definition": "A hybrid pairs an engine with a small battery, around 1 kWh, that is cycled hard for power rather than energy; a plug-in hybrid adds a 10–25 kWh pack that can be charged from the grid for electric-only driving. Their cells are designed for power and life rather than energy.",
        "related": [
          "electric-vehicle",
          "specific-power",
          "nickel-metal-hydride",
          "cycle-life",
          "48v-system"
        ],
        "url": "https://lemonergy.com/learn/glossary/hybrid-vehicle/",
        "mentions": [
          "kilowatt-hour"
        ]
      }
    },
    {
      "id": "term:opportunity-charging",
      "type": "Term",
      "label": "Opportunity charging",
      "properties": {
        "id": "opportunity-charging",
        "name": "Opportunity charging",
        "aka": [
          "en-route charging",
          "terminus charging"
        ],
        "section": "topic-infrastructure",
        "definition": "Topping up a vehicle in short, high-power bursts wherever it stops anyway — a bus at its terminus or at stops, a forklift at breaks — instead of carrying enough energy for the whole day. It allows a smaller, lighter battery, at the price of frequent high-rate cycling and of chargers along the route.",
        "related": [
          "pantograph-charging",
          "depot-charging",
          "fast-charging",
          "electric-bus",
          "charge-acceptance",
          "inductive-charging"
        ],
        "url": "https://lemonergy.com/learn/glossary/opportunity-charging/",
        "mentions": []
      }
    },
    {
      "id": "term:kilowatt-hour",
      "type": "Term",
      "label": "Kilowatt-hour",
      "properties": {
        "id": "kilowatt-hour",
        "name": "Kilowatt-hour",
        "abbr": "kWh",
        "section": "topic-units",
        "definition": "One thousand watt-hours, the unit for pack and system energy. An electric car carries 40–100 kWh; grid storage is quoted in megawatt-hours (1000 kWh) and factory output in gigawatt-hours per year.",
        "unit": "kWh",
        "related": [
          "watt-hour",
          "nominal-energy",
          "cost-per-kwh",
          "gigafactory"
        ],
        "url": "https://lemonergy.com/learn/glossary/kilowatt-hour/",
        "mentions": []
      }
    }
  ]
}