Directory profiles · Battery Business Directory
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Manufacturing Process Map - 3. Formation
Challenges
slow throughput due to long time required; fire (most factory fires occur here)
30-50% of total manufacturing cost
FORMATION Electrochemical activation. SEI is formed on the anode
time
scrap rate
days
AGING Battery is stored at a consistent temperature and humidity to allow for corrosion mechanisms from potential contamination
CHARGING, DISCHARGING/ CAPACITY CHECK
Challenges
process time/throughput; factory footprint; quality escapes
Challenges
throughput; footprint
DEGASSING Challenges
residual gas inside the cell; seal quality; throughput (a lot of additional CAPEX due to dry room requirement)
Pouch & prismatic only. Gases formed during aging are cut off inside of a vacuum chamber (sacrificial gas bag). Typically in pouch, this is the final step. In some large cells, a secondary fill and subsequent charge is performed.
QUALITY CONTROL End of line check capacity, resistance, voltage, etc., + cosmetic
Challenges
cosmetic & variation in capacity; yield
*Graphics courtesy of LG Energy Solution. Reproduced with permission. Source: LG Energy, BCG, RWTH PEM, internal expertise
Extracted from the PDF; charts and images may read imperfectly.
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