{
  "node": {
    "id": "term:battery-data-format",
    "type": "Term",
    "label": "Battery Data Format",
    "properties": {
      "id": "battery-data-format",
      "name": "Battery Data Format",
      "abbr": "BDF",
      "aka": [
        "Battery Data Alliance"
      ],
      "section": "topic-data",
      "definition": "An open, tool-independent format for cell-test time series — time, voltage, current, temperature, cycle and step with agreed names and units — promoted by the Battery Data Alliance so data from different cyclers can be shared and compared without conversion scripts.",
      "related": [
        "cycler-file-formats",
        "hdf5",
        "cycler",
        "reference-performance-test"
      ],
      "url": "https://lemonergy.com/learn/glossary/battery-data-format/",
      "mentions": []
    }
  },
  "edges": [
    {
      "id": "edge:4227",
      "source": "term:battery-data-format",
      "target": "topic:topic-data",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:4228",
      "source": "term:battery-data-format",
      "target": "term:cycler-file-formats",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4229",
      "source": "term:battery-data-format",
      "target": "term:hdf5",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4230",
      "source": "term:battery-data-format",
      "target": "term:cycler",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4231",
      "source": "term:battery-data-format",
      "target": "term:reference-performance-test",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-data",
      "type": "Topic",
      "label": "Data, communication and electronics",
      "properties": {
        "id": "topic-data",
        "name": "Data, communication and electronics",
        "lede": "The control units, chips, protocols and file formats through which a battery is measured, controlled and logged.",
        "context": "Separate quantities from encoding and transport.",
        "example": "2500 in a log might mean 25.00 °C, 2.5 V or raw counts. Units and scale must accompany the value.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/battery-basics/",
        "lesson_label": "Open battery basics"
      }
    },
    {
      "id": "term:cycler-file-formats",
      "type": "Term",
      "label": "Cycler file formats",
      "properties": {
        "id": "cycler-file-formats",
        "name": "Cycler file formats",
        "aka": [
          ".nda",
          ".ndax",
          ".res",
          ".mpr",
          ".mpt",
          "Neware",
          "Arbin",
          "BioLogic",
          "Maccor"
        ],
        "section": "topic-data",
        "definition": "The native files of battery testers: Neware .nda and .ndax, Arbin .res, BioLogic EC-Lab .mpr and .mpt, Maccor raw and exported files, and others. Each stores the same time, voltage and current data differently, which is why open readers and the Battery Data Format exist.",
        "related": [
          "battery-data-format",
          "cycler",
          "potentiostat",
          "electrochemical-impedance-spectroscopy"
        ],
        "url": "https://lemonergy.com/learn/glossary/cycler-file-formats/",
        "mentions": []
      }
    },
    {
      "id": "term:hdf5",
      "type": "Term",
      "label": "HDF5 and Parquet",
      "properties": {
        "id": "hdf5",
        "name": "HDF5 and Parquet",
        "abbr": ".h5, .parquet",
        "section": "topic-data",
        "definition": "General-purpose binary formats for large scientific and tabular data — hierarchical HDF5 and columnar Parquet — used to store battery test and fleet data at scale, where CSV becomes too slow and too large.",
        "related": [
          "mdf4",
          "battery-data-format",
          "fleet-telematics"
        ],
        "url": "https://lemonergy.com/learn/glossary/hdf5/",
        "mentions": []
      }
    },
    {
      "id": "term:cycler",
      "type": "Term",
      "label": "Battery cycler",
      "properties": {
        "id": "cycler",
        "name": "Battery cycler",
        "aka": [
          "battery tester",
          "cycling channel"
        ],
        "section": "topic-testing",
        "definition": "The instrument that charges and discharges cells to a programmed schedule while logging voltage, current and temperature, with one independent channel per cell. Laboratory cyclers resolve microvolts; production formation cyclers handle thousands of cells at once.",
        "related": [
          "testing",
          "capacity-test",
          "potentiostat",
          "formation",
          "cycler-file-formats"
        ],
        "url": "https://lemonergy.com/learn/glossary/cycler/",
        "mentions": []
      }
    },
    {
      "id": "term:reference-performance-test",
      "type": "Term",
      "label": "Reference performance test",
      "properties": {
        "id": "reference-performance-test",
        "name": "Reference performance test",
        "abbr": "RPT",
        "aka": [
          "check-up"
        ],
        "section": "topic-testing",
        "definition": "A fixed set of measurements — capacity, resistance by pulse, sometimes impedance — repeated at intervals during an aging test to track state of health under identical conditions. Everything between RPTs is the aging itself.",
        "related": [
          "capacity-test",
          "hppc",
          "state-of-health",
          "accelerated-aging"
        ],
        "url": "https://lemonergy.com/learn/glossary/reference-performance-test/",
        "mentions": [
          "impedance"
        ]
      }
    }
  ]
}