{ "node": { "id": "term:cell-to-module-to-pack", "type": "Term", "label": "Cell-to-module-to-pack", "properties": { "id": "cell-to-module-to-pack", "name": "Cell-to-module-to-pack", "aka": [ "cell-to-module", "CTM", "module-based pack" ], "section": "topic-pack", "definition": "The conventional three-level pack build: cells are assembled into modules with their own frames, sensing and connectors, and modules into the pack. Modules simplify handling, testing and repair — a faulty one can be swapped — but their frames and spacing take mass and volume that cell-to-pack designs reclaim.", "related": [ "module", "cell-to-pack", "pack", "cell-to-pack-ratio", "electrode-to-pack", "remanufacturing" ], "url": "https://lemonergy.com/learn/glossary/cell-to-module-to-pack/", "mentions": [] } }, "edges": [ { "id": "edge:4957", "source": "term:cell-to-module-to-pack", "target": "topic:topic-pack", "type": "belongsTo", "properties": { "sourceFile": "terms.json" } }, { "id": "edge:4958", "source": "term:cell-to-module-to-pack", "target": "term:module", "type": "relatedTo", "properties": { "sourceFile": "terms.json", "meaning": "Related context; not a causal claim" } }, { "id": "edge:4959", "source": "term:cell-to-module-to-pack", "target": "term:cell-to-pack", "type": "relatedTo", "properties": { "sourceFile": "terms.json", "meaning": "Related context; not a causal claim" } }, { "id": "edge:4960", "source": "term:cell-to-module-to-pack", "target": "term:pack", "type": "relatedTo", "properties": { "sourceFile": "terms.json", "meaning": "Related context; not a causal claim" } }, { "id": "edge:4961", "source": "term:cell-to-module-to-pack", "target": "term:cell-to-pack-ratio", "type": "relatedTo", "properties": { "sourceFile": "terms.json", "meaning": "Related context; not a causal claim" } }, { "id": "edge:4962", "source": "term:cell-to-module-to-pack", "target": "term:electrode-to-pack", "type": "relatedTo", "properties": { "sourceFile": "terms.json", "meaning": "Related context; not a causal claim" } }, { "id": "edge:4963", "source": "term:cell-to-module-to-pack", "target": "term:remanufacturing", "type": "relatedTo", "properties": { "sourceFile": "terms.json", "meaning": "Related context; not a causal claim" } }, { "id": "edge:4964", "source": "term:cell-to-module-to-pack", "target": "visual:pack", "type": "illustratedBy", "properties": { "sourceFile": "visual-pages.json" } } ], "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:module", "type": "Term", "label": "Module", "properties": { "id": "module", "name": "Module", "section": "topic-pack", "definition": "A group of cells connected in series and parallel, mechanically held together with its own voltage and temperature sensing, built as the unit from which a pack is assembled and serviced. Cell-to-pack designs do away with it.", "related": [ "cell", "pack", "series-parallel", "cell-to-pack", "cell-supervision-circuit" ], "lesson": "fundamentals/battery-basics/#cell-module-pack", "url": "https://lemonergy.com/learn/glossary/module/", "mentions": [] } }, { "id": "term:cell-to-pack", "type": "Term", "label": "Cell-to-pack", "properties": { "id": "cell-to-pack", "name": "Cell-to-pack", "abbr": "CTP", "section": "topic-pack", "definition": "Building the pack directly from cells without the intermediate module, using large-format cells that bear load themselves. It raises the cell-to-pack ratio and cuts parts, at the cost of making the pack harder to service.", "related": [ "module", "cell-to-pack-ratio", "cell-to-chassis", "blade-cell", "ab-battery-system" ], "url": "https://lemonergy.com/learn/glossary/cell-to-pack/", "mentions": [] } }, { "id": "term:pack", "type": "Term", "label": "Battery pack", "properties": { "id": "pack", "name": "Battery pack", "section": "topic-pack", "definition": "The complete battery as installed: modules or cells, the BMS, contactors and fuses, busbars, cooling, sensors and an enclosure. Its energy is the sum of its cells’ energies; its mass and volume are a good deal more.", "related": [ "module", "bms", "battery-disconnect-unit", "thermal-management", "cell-to-pack-ratio", "enclosure" ], "lesson": "fundamentals/battery-basics/#cell-module-pack", "url": "https://lemonergy.com/learn/glossary/pack/", "mentions": [] } }, { "id": "term:cell-to-pack-ratio", "type": "Term", "label": "Cell-to-pack ratio", "properties": { "id": "cell-to-pack-ratio", "name": "Cell-to-pack ratio", "aka": [ "gravimetric cell-to-pack ratio", "GCTP" ], "section": "topic-ratings", "definition": "The share of a pack’s mass or volume that is cells rather than housing, cooling, busbars and electronics. It is typically 60–75 % by mass; raising it is the point of cell-to-pack and cell-to-chassis designs.", "unit": "%", "related": [ "cell-to-pack", "specific-energy", "pack" ], "url": "https://lemonergy.com/learn/glossary/cell-to-pack-ratio/", "mentions": [ "cell-to-chassis" ] } }, { "id": "term:electrode-to-pack", "type": "Term", "label": "Electrode-to-pack", "properties": { "id": "electrode-to-pack", "name": "Electrode-to-pack", "abbr": "ETP", "aka": [ "E2P", "ETOP" ], "section": "topic-pack", "definition": "A pack concept that skips both the cell can and the module: electrode stacks sealed in thin film are placed directly in the pack enclosure and connected there. 24M, which proposed it, claims electrodes could fill about 80% of pack volume against 30–60% in conventional packs — a step beyond cell-to-pack.", "related": [ "cell-to-pack", "cell-to-module-to-pack", "cell-to-pack-ratio", "cell-to-chassis", "pouch-cell" ], "url": "https://lemonergy.com/learn/glossary/electrode-to-pack/", "mentions": [ "electrode", "enclosure" ] } }, { "id": "term:remanufacturing", "type": "Term", "label": "Remanufacturing and repair", "properties": { "id": "remanufacturing", "name": "Remanufacturing and repair", "aka": [ "refurbishment", "module replacement" ], "section": "topic-recycling", "definition": "Restoring a pack to its original duty by replacing failed or weak modules, cells, electronics or seals, then retesting it. It keeps the most value of any end-of-life route, and depends on packs that can be opened and on cells that can be matched.", "related": [ "battery-triage", "second-life", "design-for-recycling", "grading" ], "url": "https://lemonergy.com/learn/glossary/remanufacturing/", "mentions": [] } }, { "id": "visual:pack", "type": "Visual", "label": "Series voltage and parallel capacity", "properties": { "title": "Series voltage and parallel capacity", "summary": "Count series and parallel connections separately.", "readout": "4S2P: 8 cells, 14.8 V, 10 Ah, 148 Wh.", "formula": "V_pack = Ns V_cell; Q_pack = Np Q_cell", "note": "Identical 3.7 V, 5 Ah cells; ideal equal current sharing and no losses.", "software": { "status": "reference", "label": "Reference concept", "body": "Ideal pack ratings use V_pack = Ns V_cell and Q_pack = Np Q_cell. The core energy helper can multiply these ratings. Imbalance and current sharing require additional models.", "href": "../fundamentals/capacity-and-c-rate/" }, "html": "
Voltage along one series string
Voltage along one series stringSeries cells versus Voltage (V). 3.7 V per cell. Interpretation follows the graphs.0011.1322.2633.3944.412Series cellsVoltage (V)
3.7 V per cell
\n
Capacity from parallel cells
Capacity from parallel cellsParallel cells versus Capacity (Ah). 5 Ah per cell. Interpretation follows the graphs.007.51.515322.54.5306Parallel cellsCapacity (Ah)
5 Ah per cell
" } } ] }