Investigation on Occupational Hazards in a Lithium Ion Battery Isolation Membrane Automated Production Line in Shanghai

Objective To analyze the types, generation links, and damage degrees of the occupational hazards in lithium ion battery isolation membrane (wet) production, as well as the effects of protective measures.

Methods A lithium ion battery isolation membrane production line of one factory in Shanghai was selected to carry out occupational health investigation, occupational hazard monitoring, and hazard assessment. According to the design deficiencies of occupational protective facilities, suggestions on corrective measures were put forward. The occupational hazards were compared and analyzed before and after the correction.

Results The occupational hazards existing in the production included noise, high temperature, paraffin wax fume, dichloromethane, and polyethylene dust. Dichloromethane extraction workshop was the critical control point. After installing local exhaust ventilation, fresh air inlet, and airflow differential adjustment, the highest concentration of dichloromethane was reduced to 1% of the concentration before corrective actions.

Conclusion Taking corresponding health protective measures can distinctly reduce the exposure intensity of occupational hazards, indicating great protective effects.