{
  "node": {
    "id": "term:polarity",
    "type": "Term",
    "label": "Polarity",
    "properties": {
      "id": "polarity",
      "name": "Polarity",
      "aka": [
        "reverse polarity"
      ],
      "section": "topic-units",
      "definition": "Which terminal is positive and which negative. Connecting a cell or charger the wrong way round, reverse polarity, drives current backwards through it and can destroy the cell, the charger or both within seconds.",
      "related": [
        "terminal",
        "cell-reversal",
        "charger"
      ],
      "url": "https://lemonergy.com/learn/glossary/polarity/",
      "mentions": []
    }
  },
  "edges": [
    {
      "id": "edge:3537",
      "source": "term:polarity",
      "target": "topic:topic-units",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:3538",
      "source": "term:polarity",
      "target": "term:terminal",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3539",
      "source": "term:polarity",
      "target": "term:cell-reversal",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3540",
      "source": "term:polarity",
      "target": "term:charger",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-units",
      "type": "Topic",
      "label": "Units and electrical basics",
      "properties": {
        "id": "topic-units",
        "name": "Units and electrical basics",
        "lede": "The quantities every datasheet is written in, and how they relate.",
        "context": "Use consistent units and cell/pack basis.",
        "example": "10 A for 30 min transfers 5 Ah. At constant 3.6 V this is 18 Wh; varying voltage requires integration.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/capacity-and-c-rate/",
        "lesson_label": "Open capacity and C-rate"
      }
    },
    {
      "id": "term:terminal",
      "type": "Term",
      "label": "Terminal",
      "properties": {
        "id": "terminal",
        "name": "Terminal",
        "section": "topic-components",
        "definition": "The external conductor through which current enters and leaves the cell: the can and cap of a cylindrical cell, two posts on a prismatic cell, or the sealed foil tabs of a pouch cell.",
        "related": [
          "tab",
          "busbar",
          "voltage"
        ],
        "url": "https://lemonergy.com/learn/glossary/terminal/",
        "mentions": [
          "cylindrical-cell",
          "prismatic-cell",
          "pouch-cell"
        ]
      }
    },
    {
      "id": "term:cell-reversal",
      "type": "Term",
      "label": "Cell reversal",
      "properties": {
        "id": "cell-reversal",
        "name": "Cell reversal",
        "section": "topic-charging",
        "definition": "A weak cell in a series string being driven below zero volts by its neighbours as the string is discharged past the weak cell’s empty point. It causes rapid, permanent damage, and preventing it is one reason a BMS monitors every cell.",
        "related": [
          "over-discharge",
          "series-parallel",
          "bms",
          "polarity"
        ],
        "url": "https://lemonergy.com/learn/glossary/cell-reversal/",
        "mentions": [
          "string"
        ]
      }
    },
    {
      "id": "term:charger",
      "type": "Term",
      "label": "Charger",
      "properties": {
        "id": "charger",
        "name": "Charger",
        "section": "topic-charging",
        "definition": "The power electronics that convert mains or DC supply into the controlled current and voltage a battery needs. For lithium-ion it runs the CC-CV profile within the limits the BMS communicates, and stops rather than floats when the cell is full.",
        "related": [
          "cc-cv-charging",
          "bms",
          "onboard-charger",
          "dc-fast-charging"
        ],
        "url": "https://lemonergy.com/learn/glossary/charger/",
        "mentions": []
      }
    }
  ]
}