PolyJoule, Inc. · 2 weeks ago
R&D Battery Cell Engineer
Billerica, MA
Full-time
Onsite
Mid LevelPolyJoule, Inc. is an MIT spinoff pioneering conductive polymer battery technology. The company is seeking a Battery Cell Engineer to lead the development and testing of prototype battery cells, involving assembly, optimization, and performance analysis to enhance material and product development.
Utilities
Responsibilities
Assemble prototype battery cells (pouch and prismatic) using automated and manual techniques for electrode fabrication, cell stacking, tab welding, enclosure sealing, and electrolyte filling
Design and optimize electrode formulations, including slurry preparation and coating processes such as slot-die, doctor blade, and dip coating; oversee subsequent steps including calendaring, precision cutting for electrode geometry, and controlled drying to ensure uniformity and performance
Contribute to defining lab-scale assembly workflows for novel chemistries to enable rapid prototyping and process optimization
Conduct electrochemical performance testing, including charge/discharge cycling, rate capability, cyclic voltammetry, and impedance spectroscopy
Perform stress testing and accelerated aging protocols to evaluate durability under various conditions; analyze failure modes through post-mortem techniques (e.g., electrode morphology, separator integrity, and electrolyte decomposition) to identify root causes and inform design improvements
Collaborate with chemists and engineers to integrate new materials into functional cells; evaluate compatibility of electrodes, electrolytes, separators, and other components to ensure optimal performance, safety, and manufacturability in prototype and lab-scale assemblies
Maintain accurate documentation of fabrication parameters and test results, including detailed bills of materials (BOMs), comprehensive experiment records, and version-controlled files to ensure traceability, reproducibility, and alignment with quality standards
Support scale-up efforts and assist in transitioning successful designs to pilot production
Communicate technical results and milestones to leadership and cross-functional teams for decision-making
Participate in vendor and material sourcing, qualification, and technical due diligence for non-Li-ion battery components
Qualification
Required
B.S. or M.S. in Chemical Engineering, Materials Science, Electrochemistry, or related field
Hands-on experience with battery cell assembly and electrochemical testing
Familiarity with non-aqueous and aqueous electrochemistry and battery characterization techniques
Strong analytical skills and proficiency with data analysis tools (Excel required)
Ability to work independently and collaboratively in a fast-paced R&D environment
Excellent organizational, documentation, and communication skills
Passion for innovation and sustainability in energy storage technologies
Preferred
Experience with advanced coating processes (slot-die, doctor blade, comma bar) and electrode fabrication workflows
Knowledge of failure mode analysis, stress testing, and accelerated aging protocols
Proficiency in programming/data analysis tools (Python, MATLAB)
Familiarity with BOM management, experiment record-keeping, and version control systems
Benefits
Competitive compensation and benefits package.
Company
PolyJoule, Inc.
PolyJoule is a Boston-based energy storage company pioneering conductive polymer battery technology.
Founded in 2011
11-50 employees
H1B Sponsorship
PolyJoule, Inc. has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2020 (2)
Funding
Current Stage
Early StageLeadership Team
Eli Paster
Chief Executive Officer
Recent News
Google Patent
2025-04-03
2025-02-16
Google Patent
2025-02-16
Company data provided by crunchbase