{
  "node": {
    "id": "term:device-under-test",
    "type": "Term",
    "label": "Device under test",
    "properties": {
      "id": "device-under-test",
      "name": "Device under test",
      "abbr": "DUT",
      "aka": [
        "unit under test",
        "UUT",
        "equipment under test",
        "EUT"
      ],
      "section": "topic-testing",
      "definition": "The general name, in test plans, standards and laboratory software, for whatever is being tested — a cell, module, pack or BMS board. A test report should define the DUT exactly, including its state of charge, temperature and fixturing, because results hold only for that configuration.",
      "related": [
        "testing",
        "cycler",
        "hil",
        "sample-phases"
      ],
      "url": "https://lemonergy.com/learn/glossary/device-under-test/",
      "mentions": [
        "state-of-charge",
        "bms"
      ]
    }
  },
  "edges": [
    {
      "id": "edge:5395",
      "source": "term:device-under-test",
      "target": "topic:topic-testing",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:5396",
      "source": "term:device-under-test",
      "target": "term:testing",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:5397",
      "source": "term:device-under-test",
      "target": "term:cycler",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:5398",
      "source": "term:device-under-test",
      "target": "term:hil",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:5399",
      "source": "term:device-under-test",
      "target": "term:sample-phases",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/device-under-test/state-of-charge",
      "source": "term:device-under-test",
      "target": "term:state-of-charge",
      "type": "mentions",
      "properties": {
        "sourceFile": "terms.json",
        "method": "build_glossary.mention_index + mentions",
        "field": "definition",
        "meaning": "Text mention; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/device-under-test/bms",
      "source": "term:device-under-test",
      "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-testing",
      "type": "Topic",
      "label": "Testing methods",
      "properties": {
        "id": "topic-testing",
        "name": "Testing methods",
        "lede": "The measurements and test procedures that characterise a cell or pack, from capacity and pulse tests to abuse and environmental tests.",
        "context": "Record specimen, state, instrument, temperature and timing.",
        "example": "Resistance immediately after a current step can differ from a ten-second value because slower polarization contributes.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/capacity-and-c-rate/",
        "lesson_label": "Open capacity measurements"
      }
    },
    {
      "id": "term:testing",
      "type": "Term",
      "label": "Cell testing",
      "properties": {
        "id": "testing",
        "name": "Cell testing",
        "section": "topic-testing",
        "definition": "Measuring a cell’s capacity, resistance, efficiency, rate capability, life and safety under defined conditions. Because every result depends on the conditions, a result without its temperature, current and voltage limits is not a result.",
        "related": [
          "capacity-test",
          "cycler",
          "reference-performance-test",
          "abuse-testing",
          "datasheet"
        ],
        "url": "https://lemonergy.com/learn/glossary/testing/",
        "mentions": [
          "rate-capability"
        ]
      }
    },
    {
      "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:hil",
      "type": "Term",
      "label": "Hardware-in-the-loop",
      "properties": {
        "id": "hil",
        "name": "Hardware-in-the-loop",
        "abbr": "HIL",
        "aka": [
          "SIL",
          "MIL",
          "software-in-the-loop",
          "model-in-the-loop"
        ],
        "section": "topic-data",
        "definition": "Testing a real BMS controller against a real-time simulation of the battery, vehicle and charger, so faults that would be dangerous on real cells can be injected safely. It follows model-in-the-loop and software-in-the-loop, where the same logic is tested as a model or as code on a PC.",
        "related": [
          "battery-emulator",
          "fpga",
          "bmu",
          "functional-safety",
          "equivalent-circuit-model",
          "fault-injection-testing"
        ],
        "url": "https://lemonergy.com/learn/glossary/hil/",
        "mentions": [
          "charger",
          "bms"
        ]
      }
    },
    {
      "id": "term:sample-phases",
      "type": "Term",
      "label": "Sample phases",
      "properties": {
        "id": "sample-phases",
        "name": "Sample phases",
        "aka": [
          "A-sample",
          "B-sample",
          "C-sample",
          "D-sample",
          "sample maturity",
          "A to D samples"
        ],
        "section": "topic-testing",
        "definition": "The automotive maturity stages of a cell or pack. A-samples are hand-built functional prototypes; B-samples have a near-final design built on prototype tooling; C-samples use series tooling and materials to validate the design; D-samples come off the series line at rate for production approval. Later design or process changes usually require requalification.",
        "related": [
          "oem",
          "cell-design",
          "testing",
          "yield",
          "device-under-test"
        ],
        "url": "https://lemonergy.com/learn/glossary/sample-phases/",
        "mentions": []
      }
    },
    {
      "id": "term:state-of-charge",
      "type": "Term",
      "label": "State of charge",
      "properties": {
        "id": "state-of-charge",
        "name": "State of charge",
        "abbr": "SOC",
        "section": "topic-state",
        "definition": "How full a cell is, as a fraction of its available capacity. State of charge, like temperature, affects how fast a stored cell ages.",
        "unit": "%",
        "related": [
          "depth-of-discharge",
          "ocv-soc-curve",
          "coulomb-counting",
          "state-of-health",
          "bms"
        ],
        "lesson": "fundamentals/battery-aging/#storage-soc",
        "example": {
          "title": "Interpret a charge inventory",
          "text": "If available capacity is 5 Ah and 3 Ah remains by the chosen estimator, SOC is 60%. A different estimate of available capacity changes this percentage, so compare SOC values only with the capacity convention recorded."
        },
        "url": "https://lemonergy.com/learn/glossary/state-of-charge/",
        "mentions": [
          "usable-capacity"
        ]
      }
    },
    {
      "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"
        ]
      }
    }
  ]
}