Processing Machinery
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PP Battery Housing
Problem Phenomenon
[Problem Phenomenon] Battery housings need acid resistance, chemical resistance, and good sealing
Cause Analysis
PP resists sulfuric acid and chemicals, classically used for battery housings and separators; heat sealing or vibration welding for sealing; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based on experience alone
Solution
Select chemical-resistant PP for battery cases; sealing welding according to process; dedicated grades for separators; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Key Takeaway
PP battery cases resist acid; sealing welding is mature; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar future problems
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