{
  "node": {
    "id": "term:ul-2054",
    "type": "Term",
    "label": "UL 2054",
    "properties": {
      "id": "ul-2054",
      "name": "UL 2054",
      "aka": [
        "Household and Commercial Batteries"
      ],
      "section": "topic-standards-stationary",
      "definition": "The UL safety standard for household and commercial battery packs, primary or rechargeable, built from cells already recognised to UL 1642 or a similar cell standard. It adds pack-level electrical, mechanical, fire and abuse tests, including checks of the protection circuit, and is the usual North American requirement for packs in tools, medical devices and consumer products.",
      "related": [
        "ul-1642",
        "iec-62133",
        "underwriters-laboratories",
        "protection-circuit"
      ],
      "url": "https://lemonergy.com/learn/glossary/ul-2054/",
      "mentions": []
    }
  },
  "edges": [
    {
      "id": "edge:belongsTo/term:ul-2054/topic:topic-standards-stationary",
      "source": "term:ul-2054",
      "target": "topic:topic-standards-stationary",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:relatedTo/term:ul-2054/term:ul-1642",
      "source": "term:ul-2054",
      "target": "term:ul-1642",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:relatedTo/term:ul-2054/term:iec-62133",
      "source": "term:ul-2054",
      "target": "term:iec-62133",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:relatedTo/term:ul-2054/term:underwriters-laboratories",
      "source": "term:ul-2054",
      "target": "term:underwriters-laboratories",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:relatedTo/term:ul-2054/term:protection-circuit",
      "source": "term:ul-2054",
      "target": "term:protection-circuit",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-standards-stationary",
      "type": "Topic",
      "label": "Stationary, industrial and product standards",
      "properties": {
        "id": "topic-standards-stationary",
        "name": "Stationary, industrial and product standards",
        "lede": "Safety and performance standards for portable, industrial and grid batteries, their electronics and their installation.",
        "context": "Match scope to product and installation.",
        "example": "A cell-level test does not establish fire performance or commissioning requirements for a complete installation.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/battery-basics/",
        "lesson_label": "Open battery basics"
      }
    },
    {
      "id": "term:ul-1642",
      "type": "Term",
      "label": "UL 1642",
      "properties": {
        "id": "ul-1642",
        "name": "UL 1642",
        "section": "topic-standards-stationary",
        "definition": "The North American safety standard for lithium cells, tested by Underwriters Laboratories through a series of electrical, mechanical and environmental abuse tests. UL 2054 covers the batteries built from them.",
        "related": [
          "iec-62133",
          "abuse-testing",
          "ul-2580",
          "ul-2054"
        ],
        "url": "https://lemonergy.com/learn/glossary/ul-1642/",
        "mentions": [
          "underwriters-laboratories"
        ]
      }
    },
    {
      "id": "term:iec-62133",
      "type": "Term",
      "label": "IEC 62133",
      "properties": {
        "id": "iec-62133",
        "name": "IEC 62133",
        "aka": [
          "IEC 62133-1",
          "IEC 62133-2",
          "EN 62133",
          "UL 62133"
        ],
        "section": "topic-standards-stationary",
        "definition": "The safety standard for portable sealed cells and batteries, part 2 covering lithium systems. Passing it is a basic requirement for consumer products, and it is often the first safety certification a new cell obtains.",
        "related": [
          "ul-1642",
          "transport-regulations",
          "consumer-electronics",
          "iec-62619",
          "iec-61960-3",
          "cb-scheme"
        ],
        "url": "https://lemonergy.com/learn/glossary/iec-62133/",
        "mentions": []
      }
    },
    {
      "id": "term:underwriters-laboratories",
      "type": "Term",
      "label": "UL",
      "properties": {
        "id": "underwriters-laboratories",
        "name": "UL",
        "aka": [
          "Underwriters Laboratories",
          "UL Solutions",
          "UL Standards & Engagement"
        ],
        "section": "topic-standards-vehicle",
        "definition": "The US safety-science organisation, founded in 1894 as Underwriters Laboratories, whose numbered standards — UL 1642, UL 2580, UL 9540, UL 9540A and others — define much of North American battery safety. Since 2022 it has operated as UL Standards & Engagement, which writes the standards, the commercial UL Solutions, which tests and certifies to them, and UL Research Institutes.",
        "related": [
          "ul-1642",
          "ul-2580",
          "ul-9540",
          "ul-9540a",
          "ul-1973",
          "iec"
        ],
        "url": "https://lemonergy.com/learn/glossary/underwriters-laboratories/",
        "mentions": []
      }
    },
    {
      "id": "term:protection-circuit",
      "type": "Term",
      "label": "Protection circuit module",
      "properties": {
        "id": "protection-circuit",
        "name": "Protection circuit module",
        "abbr": "PCM",
        "aka": [
          "protection board",
          "PCB"
        ],
        "section": "topic-pack",
        "definition": "The small circuit on a consumer cell or pack that disconnects it on overvoltage, undervoltage, overcurrent or overtemperature, using MOSFETs as switches. It is the minimum BMS; it protects but does not estimate state or balance.",
        "related": [
          "bms",
          "overcharge",
          "over-discharge",
          "fuel-gauge",
          "secondary-protection",
          "overcurrent-protection"
        ],
        "url": "https://lemonergy.com/learn/glossary/protection-circuit/",
        "mentions": []
      }
    }
  ]
}