{
  "node": {
    "id": "term:battery-authentication",
    "type": "Term",
    "label": "Battery authentication",
    "properties": {
      "id": "battery-authentication",
      "name": "Battery authentication",
      "aka": [
        "authentication IC",
        "counterfeit battery detection",
        "secure battery ID"
      ],
      "section": "topic-pack",
      "definition": "A check by which a host or charger confirms that a battery is genuine before using or charging it: a secure chip in the pack answers a random challenge with a response computed from a secret key, typically with SHA-256 or elliptic-curve cryptography. It keeps clones, with weaker cells and protection, out of phones, tools and medical devices.",
      "related": [
        "one-wire",
        "smbus",
        "fuel-gauge",
        "protection-circuit"
      ],
      "url": "https://lemonergy.com/learn/glossary/battery-authentication/",
      "mentions": [
        "charger"
      ]
    }
  },
  "edges": [
    {
      "id": "edge:belongsTo/term:battery-authentication/topic:topic-pack",
      "source": "term:battery-authentication",
      "target": "topic:topic-pack",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:relatedTo/term:battery-authentication/term:one-wire",
      "source": "term:battery-authentication",
      "target": "term:one-wire",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:relatedTo/term:battery-authentication/term:smbus",
      "source": "term:battery-authentication",
      "target": "term:smbus",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:relatedTo/term:battery-authentication/term:fuel-gauge",
      "source": "term:battery-authentication",
      "target": "term:fuel-gauge",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:relatedTo/term:battery-authentication/term:protection-circuit",
      "source": "term:battery-authentication",
      "target": "term:protection-circuit",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:mentions/battery-authentication/charger",
      "source": "term:battery-authentication",
      "target": "term:charger",
      "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-pack",
      "type": "Topic",
      "label": "Modules, packs and battery management",
      "properties": {
        "id": "topic-pack",
        "name": "Modules, packs and battery management",
        "lede": "From a single cell to a working battery system, and the electronics that keep it safe.",
        "context": "Make series/parallel architecture explicit.",
        "example": "Twelve 3.6 V, 5 Ah cells in 6s2p give 21.6 V, 10 Ah and 216 Wh nominally before other restrictions.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/cell-architecture/",
        "lesson_label": "Open cell architecture"
      }
    },
    {
      "id": "term:one-wire",
      "type": "Term",
      "label": "1-Wire",
      "properties": {
        "id": "one-wire",
        "name": "1-Wire",
        "aka": [
          "1-Wire bus",
          "one-wire interface",
          "battery ID chip"
        ],
        "section": "topic-data",
        "definition": "A bus that needs only one data line plus ground, originally from Dallas Semiconductor, in which the data line also powers the small chips on it. Battery packs use it for identification chips that let a charger or host read the pack type and serial number and, in secure parts, an authentication response.",
        "related": [
          "battery-authentication",
          "i2c",
          "smbus",
          "temperature-sensor"
        ],
        "url": "https://lemonergy.com/learn/glossary/one-wire/",
        "mentions": [
          "charger"
        ]
      }
    },
    {
      "id": "term:smbus",
      "type": "Term",
      "label": "SMBus",
      "properties": {
        "id": "smbus",
        "name": "SMBus",
        "aka": [
          "System Management Bus"
        ],
        "section": "topic-pack",
        "definition": "The two-wire bus, derived from I²C, over which a laptop or tool battery reports its charge, health and limits to the host and charger. The Smart Battery Data specification defines the register set, so any compliant charger can read it.",
        "related": [
          "bms",
          "fuel-gauge",
          "consumer-electronics",
          "charger",
          "smart-battery-system",
          "i2c"
        ],
        "url": "https://lemonergy.com/learn/glossary/smbus/",
        "mentions": []
      }
    },
    {
      "id": "term:fuel-gauge",
      "type": "Term",
      "label": "Fuel gauge",
      "properties": {
        "id": "fuel-gauge",
        "name": "Fuel gauge",
        "aka": [
          "gas gauge"
        ],
        "section": "topic-pack",
        "definition": "The single chip in a phone, laptop or power tool that does the BMS’s state-estimation job for one or a few cells: coulomb counting corrected by an OCV model, with impedance tracking in better parts. It reports remaining capacity over SMBus or I²C.",
        "related": [
          "coulomb-counting",
          "state-of-charge",
          "smbus",
          "consumer-electronics",
          "afe",
          "soc-indicator"
        ],
        "url": "https://lemonergy.com/learn/glossary/fuel-gauge/",
        "mentions": [
          "coulomb",
          "impedance",
          "open-circuit-voltage",
          "bms"
        ]
      }
    },
    {
      "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": []
      }
    },
    {
      "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": []
      }
    }
  ]
}