Cell manufacturing/Aging

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Description

Production process

• Final step in cell production
• Process aims at for quality assurance
• Cell characteristics performance are monitored over a period of up to three weeks: Regular measurment of open circuit voltage (OCV)
• Aging differentiation: High temperature (HT) and normal temperature (NT) aging; usual againg sequence: first, HT aging and, then, NT aging
• Storage in so-called aging shelves and/or towers
• Quality assurance: No significant change in the cell properties over the entire period of time
• Aging duration depends strongly on cell manufacturer and used chemistry

Process parameters & requirements

• State of charge of the cell at the beginning of aging: 80 % - 100 % SOC
• Aging time: up to 3 weeks
• Normal temperature approx. 22°C, high temperature approx. 30°C - 50°C

Technology alternatives

• Different procedures for sequence and duration of HT and NT aging (depending on cell manufacturer chemistry).

Quality influences

• Orientation of cells
• Packing density of the cell good carriers
• Ambient temperature

Quality features

• Capacity
• Internal resistance
• Self-discharge rate

Source

Heimes, H.H.; Kampker, A.; Lienemann, C.; Locke, M.; Offermanns, C.; Michaelis, S.; Rahimzei, E. (2018) Lithium-Ion Battery Cell Production Process; PEM of RWTH Aachen and VDMA, 3rd Edition, ISBN:978-3-947920-03-7

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Subject	Property	Object
Cell manufacturing/Aging	HasPredecessor	Cell manufacturing/Degassing
Cell manufacturing/Aging	HasSuccessor	Cell manufacturing/EOL Testing

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