{
  "node": {
    "id": "term:relative-humidity",
    "type": "Term",
    "label": "Relative humidity",
    "properties": {
      "id": "relative-humidity",
      "name": "Relative humidity",
      "abbr": "RH",
      "section": "topic-thermal",
      "definition": "The water vapour in air as a percentage of the most it could hold at that temperature. The same air reads a different RH when warmed or cooled, so dry rooms are specified by dew point instead. Air at 25 °C and 50 % RH has a dew point of about 14 °C: any surface colder than that collects condensation.",
      "related": [
        "dew-point",
        "dry-room",
        "condensation-control",
        "moisture-content"
      ],
      "url": "https://lemonergy.com/learn/glossary/relative-humidity/",
      "mentions": []
    }
  },
  "edges": [
    {
      "id": "edge:4675",
      "source": "term:relative-humidity",
      "target": "topic:topic-thermal",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:4676",
      "source": "term:relative-humidity",
      "target": "term:dew-point",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4677",
      "source": "term:relative-humidity",
      "target": "term:dry-room",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4678",
      "source": "term:relative-humidity",
      "target": "term:condensation-control",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4679",
      "source": "term:relative-humidity",
      "target": "term:moisture-content",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-thermal",
      "type": "Topic",
      "label": "Thermal management and heat transfer",
      "properties": {
        "id": "topic-thermal",
        "name": "Thermal management and heat transfer",
        "lede": "How heat is made, moved and removed in cells and packs, and the hardware that keeps a battery at the right temperature.",
        "context": "Select spatial detail for the question.",
        "example": "Equal total heat in different layouts can produce different gradients. Average temperature can miss a hot spot.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/battery-aging/",
        "lesson_label": "Open temperature and aging"
      }
    },
    {
      "id": "term:dew-point",
      "type": "Term",
      "label": "Dew point",
      "properties": {
        "id": "dew-point",
        "name": "Dew point",
        "section": "topic-manufacturing",
        "definition": "The temperature at which the water vapour in air would start to condense, the standard way of specifying dry-room humidity. A −40 °C dew point corresponds to about 0.5 % relative humidity at room temperature.",
        "unit": "°C",
        "related": [
          "dry-room",
          "moisture-content"
        ],
        "url": "https://lemonergy.com/learn/glossary/dew-point/",
        "mentions": [
          "relative-humidity"
        ]
      }
    },
    {
      "id": "term:dry-room",
      "type": "Term",
      "label": "Dry room",
      "properties": {
        "id": "dry-room",
        "name": "Dry room",
        "section": "topic-manufacturing",
        "definition": "A production room whose air is kept extremely dry — dew points around −30 °C to −60 °C — so that no moisture reaches the cell while the electrolyte goes in. Water would react with the salt LiPF₆ to form hydrofluoric acid.",
        "related": [
          "dew-point",
          "vacuum-drying",
          "electrolyte-filling",
          "lithium-salt"
        ],
        "lesson": "fundamentals/cell-production/#assembly",
        "url": "https://lemonergy.com/learn/glossary/dry-room/",
        "mentions": [
          "electrolyte",
          "hydrofluoric-acid",
          "lipf6"
        ]
      }
    },
    {
      "id": "term:condensation-control",
      "type": "Term",
      "label": "Condensation control",
      "properties": {
        "id": "condensation-control",
        "name": "Condensation control",
        "aka": [
          "desiccant",
          "desiccant cartridge",
          "breather vent"
        ],
        "section": "topic-thermal",
        "definition": "Keeping liquid water out of a sealed pack that breathes as it heats and cools. Air drawn in through the pressure-equalisation vent can condense on surfaces chilled below its dew point, so designs combine membrane vents that pass air but not water, desiccant cartridges that soak up moisture, and coolant control that avoids over-chilling.",
        "related": [
          "relative-humidity",
          "dew-point",
          "enclosure",
          "ip-rating",
          "insulation-resistance",
          "chiller"
        ],
        "url": "https://lemonergy.com/learn/glossary/condensation-control/",
        "mentions": [
          "pressure-equalisation-vent"
        ]
      }
    },
    {
      "id": "term:moisture-content",
      "type": "Term",
      "label": "Moisture content",
      "properties": {
        "id": "moisture-content",
        "name": "Moisture content",
        "aka": [
          "Karl Fischer titration"
        ],
        "section": "topic-manufacturing",
        "definition": "The water left in electrodes, separator and electrolyte, measured by Karl Fischer titration and specified in the low hundreds of parts per million or below. Water forms HF with the salt, which attacks the positive electrode and the SEI.",
        "unit": "ppm",
        "related": [
          "vacuum-drying",
          "dry-room",
          "hydrofluoric-acid"
        ],
        "url": "https://lemonergy.com/learn/glossary/moisture-content/",
        "mentions": [
          "electrode",
          "positive-electrode",
          "separator",
          "electrolyte",
          "sei"
        ]
      }
    }
  ]
}