Battery Cell Winding & Assembly Specialist (Cylindrical)

EnerSys; Greenville (SC); On-site; USD 85,000 - 120,000; Full time

Job summary

EnerSys is a global leader in stored energy solutions and battery systems seeking a Specialist for Jelly Roll Winding & Cell Assembly. The role focuses on winding, electrode handling, tab connection, and assembly processes that impact cell quality and manufacturing performance.

The candidate will collaborate with Engineering, Quality, Maintenance, Automation, EHS, Product Development, and suppliers to scale processes from pilot operations to commercial production, ensuring robust, repeatable

Qualifications

• Bachelor's degree in Mechanical, Production, Electrical, or related field.
• 3+ years in lithium-ion battery manufacturing focusing on cylindrical winding and assembly.
• Experience with equipment qualification, process validation, startup, and ramp-up.
• Proficiency with MS Office; familiarity with MES/SCADA and data tools.

Responsibilities

• Develop, optimize, and sustain jelly roll winding processes for cylindrical lithium-ion battery cell formats including 18650, 21700, and 46xx cells.
• Define, validate, and control critical winding parameters including web tension, winding speed, alignment, overlap, separator handling, mandrel design, and jelly roll geometry.
• Support cell assembly operations including electrode preparation, tab welding, insulation application, jelly roll insertion, beading, sealing, electrolyte filling interfaces, and pre‑formation preparation activities.
• Analyze process performance and implement improvements to increase yield, throughput, process capability, operational efficiency, and product quality.
• Investigate and resolve manufacturing defects including alignment issues, separator damage, winding defects, dimensional deviations, contamination concerns, burr‑related defects, and internal short risks.
• Assist in equipment selection, supplier technical reviews, FAT, SAT, commissioning, qualification, and production startup activities.
• Collaborate with process engineering, product development, quality, maintenance, automation, and production teams to transfer processes from development to high‑volume manufacturing.
• Develop and maintain process documentation including work instructions, process standards, training materials, PFMEA inputs, control plans, and operating procedures.
• Apply structured problem‑solving methodologies including Root Cause Analysis, 8D, SPC, process capability analysis, and continuous improvement techniques.
• Ensure compliance with dry‑room standards, safety requirements, quality systems, contamination control, and battery manufacturing best practices.
• Participate in startup, commissioning, technology transfer, and manufacturing readiness activities supporting Gigafactory deployment and production ramp.

Skills

Battery manufacturing

Process optimization

Data analysis

Root cause analysis

MS Excel

MES/SCADA

Education

Bachelor's degree in Mechanical Engineering

Tools

MES

SCADA

Job description

EnerSys is a global leader in stored energy solutions and battery systems seeking a Specialist for Jelly Roll Winding & Cell Assembly. The role focuses on winding, electrode handling, tab connection, and assembly processes that impact cell quality and manufacturing performance.

The candidate will collaborate with Engineering, Quality, Maintenance, Automation, EHS, Product Development, and suppliers to scale processes from pilot operations to commercial production, ensuring robust, repeatable