Cell manufacturing/Aging

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< Battery value chain‎ | Process‎ | Cell manufacturingBattery value chain/Process/Cell manufacturing/Aging
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|label=Cell manufacturing/Aging
 
|label=Cell manufacturing/Aging
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|description===Production process==
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|description=
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====Production process====
  
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*Aging represents the final step in cell production and is used for quality assurance.
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*Final step in cell production
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*During aging, cell characteristics and cell performance are monitored by regularly measuring the open circuit voltage (OCV) of the cell over a period of up to three weeks.
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*Process aims at for quality assurance
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*A distinction is made between high temperature (HT) and normal temperature (NT) aging. The cells usually first undergo HT aging and then NT aging.
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*Cell characteristics performance are monitored over a period of up to three weeks: Regular measurment of open circuit voltage (OCV)
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*The cells are stored in so-called aging shelves and/or towers.
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*Aging differentiation: High temperature (HT) and normal temperature (NT) aging; usual againg sequence: first, HT aging and, then, NT aging
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*No significant change in the cell properties over the entire period of time means that the cell is fully functional and can be delivered to the customer.
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*Storage in so-called aging shelves and/or towers
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*In contrast to formation, the pouch cells are no longer pressurised in this process step.
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*Quality assurance: No significant change in the cell properties over the entire period of time  
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*The duration of the aging process depends strongly on the respective cell manufacturer and the cell chemistry used.
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*Aging duration depends strongly on cell manufacturer and used chemistry  
  
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==Process parameters & requirements==
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====Process parameters & requirements====
  
 
*State of charge of the cell at the beginning of aging: 80 % - 100 % SOC
 
*State of charge of the cell at the beginning of aging: 80 % - 100 % SOC
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*Normal temperature approx. 22°C, high temperature approx. 30°C - 50°C
 
*Normal temperature approx. 22°C, high temperature approx. 30°C - 50°C
  
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==Technology alternatives==
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====Technology alternatives====
  
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*There are different procedures for the sequence and duration of HT and NT aging depending on the cell manufacturer and cell chemistry.
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*Different procedures for sequence and duration of HT and NT aging (depending on cell manufacturer chemistry).
  
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==Quality influences==
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====Quality influences====
  
 
*Orientation of cells
 
*Orientation of cells
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*Ambient temperature
 
*Ambient temperature
  
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==Quality features==
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====Quality features====
  
 
*Capacity
 
*Capacity
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*Self-discharge rate
 
*Self-discharge rate
  
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==Source==
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====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
 
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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|relations={{Semantic Link
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|value=Battery value chain/Process/Cell manufacturing/Degassing
 
|value=Battery value chain/Process/Cell manufacturing/Degassing
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|property=HasSuccessor
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|value=Battery value chain/Process/Cell manufacturing/EOL Testing
 
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Latest revision as of 05:17, 4 September 2022


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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