Sealing Process Handbook for New Energy Battery Manufacturing

This handbook provides a comprehensive guide to sealing processes in new energy battery manufacturing, covering purpose, basic principles, and sealing mechanisms of common materials. It details equipment operation for top sealing and degassing machines, including anomaly solutions, seal head and fixture selection, and process parameter optimization (temperature, time, pressure, vacuum). Standard operating procedures (SOP) for top sealing and degassing are outlined, along with control and effect inspection methods. Common sealing failure modes such as poor sealing, corrosion, swelling, wrinkling, and blistering are analyzed with causes and prevention strategies. Sealing reliability assessment includes heat seal bond strength testing and parallelism judgment. The handbook also presents a sealing process FMEA for top sealing, vacuum sealing, and degassing, and covers punching die procedures, key factors, pressure and wrinkle issues, sealant failure analysis (cross-section, leakage test, CuSO4 dipping), DNP foil storage, pack information, soft pack usage, new tab-film characteristics, large-size battery module approaches, and DNP packaging material formability and supply system.