{
  "node": {
    "id": "term:tab-pull-test",
    "type": "Term",
    "label": "Tab pull-strength test",
    "properties": {
      "id": "tab-pull-test",
      "name": "Tab pull-strength test",
      "aka": [
        "weld pull test",
        "pull test",
        "weld peel test"
      ],
      "section": "topic-testing",
      "definition": "Pulling a welded tab or busbar joint until it breaks, recording the peak force and where the break occurred, to verify weld quality. It is destructive, so samples are taken from each batch or shift; failure through the parent foil rather than at the weld interface indicates a sound joint.",
      "related": [
        "tab-welding",
        "ultrasonic-welding",
        "laser-welding",
        "tab",
        "busbar"
      ],
      "url": "https://lemonergy.com/learn/glossary/tab-pull-test/",
      "mentions": []
    }
  },
  "edges": [
    {
      "id": "edge:5444",
      "source": "term:tab-pull-test",
      "target": "topic:topic-testing",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:5445",
      "source": "term:tab-pull-test",
      "target": "term:tab-welding",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:5446",
      "source": "term:tab-pull-test",
      "target": "term:ultrasonic-welding",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:5447",
      "source": "term:tab-pull-test",
      "target": "term:laser-welding",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:5448",
      "source": "term:tab-pull-test",
      "target": "term:tab",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:5449",
      "source": "term:tab-pull-test",
      "target": "term:busbar",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; 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:tab-welding",
      "type": "Term",
      "label": "Tab welding",
      "properties": {
        "id": "tab-welding",
        "name": "Tab welding",
        "section": "topic-manufacturing",
        "definition": "Joining the bundle of foil tabs to the terminal tab, usually by ultrasonic welding, which bonds thin foils without melting them; laser welding is used for can-to-cap and busbar joints. A weak weld raises resistance and can fail in service.",
        "related": [
          "tab",
          "ultrasonic-welding",
          "laser-welding",
          "internal-resistance",
          "tab-pull-test"
        ],
        "lesson": "fundamentals/cell-production/#assembly",
        "url": "https://lemonergy.com/learn/glossary/tab-welding/",
        "mentions": [
          "busbar"
        ]
      }
    },
    {
      "id": "term:ultrasonic-welding",
      "type": "Term",
      "label": "Ultrasonic welding",
      "properties": {
        "id": "ultrasonic-welding",
        "name": "Ultrasonic welding",
        "section": "topic-manufacturing",
        "definition": "Joining metals by pressing them together and vibrating one part at ultrasonic frequency, so friction scrubs the surfaces clean and bonds them below the melting point. It is the standard way to weld stacks of thin aluminium and copper foil.",
        "related": [
          "tab-welding",
          "laser-welding",
          "tab"
        ],
        "url": "https://lemonergy.com/learn/glossary/ultrasonic-welding/",
        "mentions": [
          "copper-foil"
        ]
      }
    },
    {
      "id": "term:laser-welding",
      "type": "Term",
      "label": "Laser welding",
      "properties": {
        "id": "laser-welding",
        "name": "Laser welding",
        "section": "topic-manufacturing",
        "definition": "Joining metal with a focused laser beam, used to seal cans, attach caps and connect busbars to cell terminals. It is fast and precise but sensitive to gaps and reflectivity, so copper joints need special wavelengths or beam shaping.",
        "related": [
          "ultrasonic-welding",
          "tab-welding",
          "busbar",
          "can"
        ],
        "url": "https://lemonergy.com/learn/glossary/laser-welding/",
        "mentions": []
      }
    },
    {
      "id": "term:tab",
      "type": "Term",
      "label": "Tab",
      "properties": {
        "id": "tab",
        "name": "Tab",
        "section": "topic-components",
        "definition": "The strip of metal that connects an electrode’s foil to the cell terminal: nickel or copper on the negative side, aluminium on the positive. Tab count and width set much of a cell’s resistance and heat generation.",
        "related": [
          "current-collector",
          "tab-welding",
          "tabless-design",
          "terminal"
        ],
        "example": {
          "title": "Electrical and thermal paths",
          "text": "Tab geometry can change electrical resistance and heat flow without changing active-material capacity."
        },
        "url": "https://lemonergy.com/learn/glossary/tab/",
        "mentions": [
          "electrode",
          "heat-generation"
        ]
      }
    },
    {
      "id": "term:busbar",
      "type": "Term",
      "label": "Busbar",
      "properties": {
        "id": "busbar",
        "name": "Busbar",
        "section": "topic-pack",
        "definition": "A rigid copper or aluminium conductor that joins cell terminals into series and parallel groups, and modules into the pack. Its cross-section is sized for current and heating, and its joints — welded or bolted — are a classic source of resistance and failure.",
        "related": [
          "series-parallel",
          "terminal",
          "laser-welding",
          "internal-resistance",
          "wire-bonding"
        ],
        "url": "https://lemonergy.com/learn/glossary/busbar/",
        "mentions": []
      }
    }
  ]
}