{
  "node": {
    "id": "term:fleet-telematics",
    "type": "Term",
    "label": "Fleet telematics",
    "properties": {
      "id": "fleet-telematics",
      "name": "Fleet telematics",
      "section": "topic-applications",
      "definition": "The systems that collect battery state, consumption and fault data from each vehicle in a fleet and bring them to the depot and the operator. For an electric bus fleet they are what turns BMS data into charging plans and warranty cases.",
      "related": [
        "fms-interface",
        "vdv-301",
        "depot-charging",
        "state-of-health",
        "electric-bus",
        "data-logger"
      ],
      "url": "https://lemonergy.com/learn/glossary/fleet-telematics/",
      "mentions": [
        "bms"
      ]
    }
  },
  "edges": [
    {
      "id": "edge:3866",
      "source": "term:fleet-telematics",
      "target": "topic:topic-applications",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:3867",
      "source": "term:fleet-telematics",
      "target": "term:fms-interface",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3868",
      "source": "term:fleet-telematics",
      "target": "term:vdv-301",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3869",
      "source": "term:fleet-telematics",
      "target": "term:depot-charging",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3870",
      "source": "term:fleet-telematics",
      "target": "term:state-of-health",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3871",
      "source": "term:fleet-telematics",
      "target": "term:electric-bus",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3872",
      "source": "term:fleet-telematics",
      "target": "term:data-logger",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/fleet-telematics/bms",
      "source": "term:fleet-telematics",
      "target": "term:bms",
      "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:fms-interface",
      "type": "Term",
      "label": "FMS interface",
      "properties": {
        "id": "fms-interface",
        "name": "FMS interface",
        "aka": [
          "FMS standard",
          "bus FMS"
        ],
        "section": "topic-pack",
        "definition": "The manufacturer-independent CAN data interface of trucks and buses, defined by the major European OEMs, that exposes vehicle data — including, for electric vehicles, battery state of charge, charging status and energy consumption — to fleet-management telematics.",
        "related": [
          "can-bus",
          "vdv-301",
          "fleet-telematics",
          "state-of-charge",
          "electric-bus",
          "j1939"
        ],
        "url": "https://lemonergy.com/learn/glossary/fms-interface/",
        "mentions": [
          "differential-electrochemical-mass-spectrometry"
        ]
      }
    },
    {
      "id": "term:vdv-301",
      "type": "Term",
      "label": "VDV 301",
      "properties": {
        "id": "vdv-301",
        "name": "VDV 301",
        "aka": [
          "VDV-Schrift 301",
          "ITxPT"
        ],
        "section": "topic-standards-vehicle",
        "definition": "The VDV recommendation on the IP-based on-board network of a bus, the basis of the European ITxPT architecture. It is how battery state, charging status and energy data from the vehicle reach the operator’s fleet systems in a standard form.",
        "related": [
          "vdv",
          "fms-interface",
          "electric-bus",
          "fleet-telematics"
        ],
        "url": "https://lemonergy.com/learn/glossary/vdv-301/",
        "mentions": []
      }
    },
    {
      "id": "term:depot-charging",
      "type": "Term",
      "label": "Depot charging",
      "properties": {
        "id": "depot-charging",
        "name": "Depot charging",
        "aka": [
          "overnight charging"
        ],
        "section": "topic-infrastructure",
        "definition": "Charging a fleet of buses or trucks at the depot, usually overnight at 50–150 kW per vehicle, which keeps cell stress low and lets an energy-management system sequence the chargers against the site’s grid connection.",
        "related": [
          "electric-bus",
          "pantograph-charging",
          "energy-management-system",
          "vdv-261",
          "fast-charging",
          "smart-charging"
        ],
        "url": "https://lemonergy.com/learn/glossary/depot-charging/",
        "mentions": []
      }
    },
    {
      "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:electric-bus",
      "type": "Term",
      "label": "Electric bus",
      "properties": {
        "id": "electric-bus",
        "name": "Electric bus",
        "abbr": "e-bus",
        "section": "topic-applications",
        "definition": "A battery-electric city or coach bus, with packs of 300–700 kWh on the roof and at the rear, LFP or NMC, charged overnight in the depot or at the terminus by pantograph. Its duty cycle — long hours, deep daily cycles, a twelve-year life — makes battery aging the central engineering question.",
        "related": [
          "depot-charging",
          "pantograph-charging",
          "vdv",
          "sort-cycle",
          "total-cost-of-ownership",
          "opportunity-charging"
        ],
        "url": "https://lemonergy.com/learn/glossary/electric-bus/",
        "mentions": [
          "kilowatt-hour"
        ]
      }
    },
    {
      "id": "term:data-logger",
      "type": "Term",
      "label": "Data logger",
      "properties": {
        "id": "data-logger",
        "name": "Data logger",
        "aka": [
          "CAN logger",
          "telematics logger"
        ],
        "section": "topic-data",
        "definition": "A device on the vehicle or bench that records bus traffic and sensor data to BLF or MDF4 files, often with triggers and remote upload. For field failures it is the black box from which the sequence of events is rebuilt.",
        "related": [
          "blf",
          "mdf4",
          "fleet-telematics",
          "freeze-frame"
        ],
        "url": "https://lemonergy.com/learn/glossary/data-logger/",
        "mentions": []
      }
    },
    {
      "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"
        ]
      }
    }
  ]
}