{ "node": { "id": "term:equivalent-lithium-content", "type": "Term", "label": "Equivalent lithium content", "properties": { "id": "equivalent-lithium-content", "name": "Equivalent lithium content", "abbr": "ELC", "section": "topic-standards-vehicle", "definition": "A notional lithium mass, 0.3 g per ampere-hour of rated capacity, once used to classify lithium-ion batteries for transport; its 8 g battery limit corresponded to about 100 Wh. The rules now rate lithium-ion by watt-hours and lithium-metal batteries by their actual lithium mass, the lightest regime allowing 1 g per cell and 2 g per battery.", "formula": "ELC = 0.3 g/Ah × rated capacity", "unit": "g", "related": [ "transport-regulations", "lithium-metal-battery", "watt-hour", "competent-authority-approval", "shipping-soc" ], "example": { "title": "Interpret the legacy conversion", "text": "Using the historical ELC conversion of 0.3 g/Ah, a 5 Ah rated battery corresponds to 1.5 g ELC. This calculated convention does not measure lithium mass and is not a substitute for current transport classification." }, "url": "https://lemonergy.com/learn/glossary/equivalent-lithium-content/", "mentions": [ "ampere-hour", "nominal-capacity" ] } }, "edges": [ { "id": "edge:7025", "source": "term:equivalent-lithium-content", "target": "topic:topic-standards-vehicle", "type": "belongsTo", "properties": { "sourceFile": "terms.json" } }, { "id": "edge:7026", "source": "term:equivalent-lithium-content", "target": "term:transport-regulations", "type": "relatedTo", "properties": { "sourceFile": "terms.json", "meaning": "Related context; not a causal claim" } }, { "id": "edge:7027", "source": "term:equivalent-lithium-content", "target": "term:lithium-metal-battery", "type": "relatedTo", "properties": { "sourceFile": "terms.json", "meaning": "Related context; not a causal claim" } }, { "id": "edge:7028", "source": "term:equivalent-lithium-content", "target": "term:watt-hour", "type": "relatedTo", "properties": { "sourceFile": "terms.json", "meaning": "Related context; not a causal claim" } }, { "id": "edge:7029", "source": "term:equivalent-lithium-content", "target": "term:competent-authority-approval", "type": "relatedTo", "properties": { "sourceFile": "terms.json", "meaning": "Related context; not a causal claim" } }, { "id": "edge:7030", "source": "term:equivalent-lithium-content", "target": "term:shipping-soc", "type": "relatedTo", "properties": { "sourceFile": "terms.json", "meaning": "Related context; not a causal claim" } }, { "id": "edge:mentions/equivalent-lithium-content/ampere-hour", "source": "term:equivalent-lithium-content", "target": "term:ampere-hour", "type": "mentions", "properties": { "sourceFile": "terms.json", "method": "build_glossary.mention_index + mentions", "field": "definition", "meaning": "Text mention; not a causal claim" } }, { "id": "edge:mentions/equivalent-lithium-content/nominal-capacity", "source": "term:equivalent-lithium-content", "target": "term:nominal-capacity", "type": "mentions", "properties": { "sourceFile": "terms.json", "method": "build_glossary.mention_index + mentions", "field": "definition", "meaning": "Text mention; not a causal claim" } }, { "id": "edge:7033", "source": "term:equivalent-lithium-content", "target": "visual:historical-lithium", "type": "illustratedBy", "properties": { "sourceFile": "visual-pages.json" } } ], "neighbors": [ { "id": "topic:topic-standards-vehicle", "type": "Topic", "label": "Vehicle and transport standards", "properties": { "id": "topic-standards-vehicle", "name": "Vehicle and transport standards", "lede": "The regulations and standards a vehicle battery must meet to be approved, and the rules for shipping batteries by road, sea and air.", "context": "Check issuing organization, edition, scope and market.", "example": "Shipping tests and vehicle battery approval tests address different uses; passing one does not automatically satisfy another.", "lesson_url": "https://lemonergy.com/learn/fundamentals/battery-basics/", "lesson_label": "Open battery basics" } }, { "id": "term:transport-regulations", "type": "Term", "label": "UN 38.3", "properties": { "id": "transport-regulations", "name": "UN 38.3", "aka": [ "UN transport test", "lithium battery shipping" ], "section": "topic-standards-vehicle", "definition": "The United Nations test sequence that every lithium cell and battery must pass before it can be shipped: altitude, thermal cycling, vibration, shock, external short, impact or crush, overcharge and forced discharge. Air shipment of cells also caps state of charge at 30 %.", "related": [ "shipping-soc", "abuse-testing", "iec-62133", "altitude-simulation-test" ], "url": "https://lemonergy.com/learn/glossary/transport-regulations/", "mentions": [ "overcharge", "state-of-charge" ] } }, { "id": "term:lithium-metal-battery", "type": "Term", "label": "Lithium-metal battery", "properties": { "id": "lithium-metal-battery", "name": "Lithium-metal battery", "section": "topic-other-chemistries", "definition": "A rechargeable cell whose negative electrode is lithium metal rather than a host material. It promises much higher energy density than lithium-ion, but lithium deposits unevenly on charge, so dendrites and short life have kept it from the mass market.", "related": [ "lithium-metal-anode", "dendrite", "solid-state-battery", "anode-free" ], "url": "https://lemonergy.com/learn/glossary/lithium-metal-battery/", "mentions": [ "electrode", "negative-electrode", "energy-density" ] } }, { "id": "term:watt-hour", "type": "Term", "label": "Watt-hour", "properties": { "id": "watt-hour", "name": "Watt-hour", "abbr": "Wh", "section": "topic-units", "definition": "A unit of energy: one watt for one hour, or 3600 joules. A cell’s nominal energy in watt-hours is its capacity in ampere-hours times its nominal voltage — 20 Ah at 3.65 V is 73 Wh.", "formula": "E = Q × V", "unit": "Wh", "related": [ "nominal-energy", "kilowatt-hour", "ampere-hour", "nominal-voltage" ], "lesson": "fundamentals/capacity-and-c-rate/#energy", "example": { "title": "Compare a Wh rating with Ah", "text": "A nominal 3.6 V, 5 Ah cell is rated at approximately 18 Wh. Watt-hours measure energy, while ampere-hours measure charge; the voltage is needed to convert between them." }, "url": "https://lemonergy.com/learn/glossary/watt-hour/", "mentions": [ "watt" ] } }, { "id": "term:competent-authority-approval", "type": "Term", "label": "Competent authority approval", "properties": { "id": "competent-authority-approval", "name": "Competent authority approval", "aka": [ "competent authority", "State of Origin approval" ], "section": "topic-standards-vehicle", "definition": "Written permission from a national authority designated under dangerous-goods law to ship what the standard provisions do not allow. By air under the IATA DGR, prototype lithium batteries not yet tested to UN 38.3, or batteries over 35 kg on cargo aircraft, need approval from the State of Origin; by road, an authority can authorise conditions for critically defective batteries.", "related": [ "transport-regulations", "damaged-battery-transport", "shipping-soc", "equivalent-lithium-content" ], "url": "https://lemonergy.com/learn/glossary/competent-authority-approval/", "mentions": [ "iata-dgr" ] } }, { "id": "term:shipping-soc", "type": "Term", "label": "Shipping state of charge", "properties": { "id": "shipping-soc", "name": "Shipping state of charge", "section": "topic-safety", "definition": "The state of charge at which cells leave the factory and travel, kept low to reduce both calendar aging and the energy available in an incident. Air-freight rules cap lithium-ion cells shipped alone at 30 %, and plants often target 10–20 %.", "unit": "%", "related": [ "storage-soc", "transport-regulations", "calendar-aging" ], "lesson": "fundamentals/cell-production/#finishing", "url": "https://lemonergy.com/learn/glossary/shipping-soc/", "mentions": [ "state-of-charge" ] } }, { "id": "term:ampere-hour", "type": "Term", "label": "Ampere-hour", "properties": { "id": "ampere-hour", "name": "Ampere-hour", "abbr": "Ah", "aka": [ "amp-hour" ], "section": "topic-units", "definition": "A unit of electric charge: one ampere flowing for one hour, or 3600 coulombs. Battery capacity is rated in ampere-hours, which measure charge, not energy.", "unit": "Ah", "related": [ "nominal-capacity", "milliampere-hour", "watt-hour" ], "lesson": "fundamentals/capacity-and-c-rate/#nominal-capacity", "url": "https://lemonergy.com/learn/glossary/ampere-hour/", "mentions": [ "ampere", "electric-charge" ] } }, { "id": "term:nominal-capacity", "type": "Term", "label": "Nominal capacity", "properties": { "id": "nominal-capacity", "name": "Nominal capacity", "aka": [ "rated capacity" ], "section": "topic-ratings", "definition": "The charge a cell is rated to deliver under specified test conditions — current, temperature, rest and voltage limits — usually in ampere-hours.", "unit": "Ah", "related": [ "ampere-hour", "c-rate", "capacity-test", "usable-capacity", "state-of-health" ], "lesson": "fundamentals/capacity-and-c-rate/#nominal-capacity", "url": "https://lemonergy.com/learn/glossary/nominal-capacity/", "mentions": [] } }, { "id": "visual:historical-lithium", "type": "Visual", "label": "Equivalent lithium content is a historical conversion", "properties": { "title": "Equivalent lithium content is a historical conversion", "summary": "The historical factor converts rated ampere-hours into a notional lithium mass.", "readout": "A 10 Ah rating corresponds to 3 g under this historical convention, regardless of nominal voltage.", "formula": "Historical ELC (g) = 0.3 g/Ah × rated capacity (Ah)", "note": "Not actual lithium mass and not a shipping-compliance calculation. Voltage is absent from this historical conversion.", "software": { "status": "reference", "label": "Reference concept", "body": "This explains an older term only. It does not determine current transport classification or replace watt-hour and actual lithium-content requirements.", "href": "../chapter-1/" }, "html": "
Historical accounting conversion
Historical accounting conversionRated capacity (Ah) versus Notional ELC (g). ELC conversion. Interpretation follows the graphs.003106209301240Rated capacity (Ah)Notional ELC (g)
ELC conversion
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