This role supports Fluence product supply and development by partnering hardware engineering lead on lithium-ion battery subsystem hardware, performance characterization, and verification testing. A working understanding of battery cell and module degradation is expected; however, the primary focus is battery electrical systems engineering and mass production of battery modules and testing (HV architecture, protection, BMS interfaces/communications, instrumentation, and validation) across internal teams, suppliers, and third-party labs.

Responsibilities include: 

• Maintain in-depth knowledge of Li-ion batteries and subsystem components (cells, modules, BMS), including key electrical ratings/limits and interface requirements for energy storage products 

• Support as lead engineer Fluence Energy battery module manufacturing in the US, including production readiness and technical issue resolution 

• Drive product and process improvements at the production facility using data-driven methods (yield, cycle time, FPY) and controlled change management 

• Partner with production teams and equipment suppliers to identify root causes of EOL test failures and production issues (containment, corrective actions, verification) 

• Contribute to battery module/pack design architecture and flow requirements into manufacturable, scalable mass-production solutions; collaborate cross-functionally to deliver to schedule 

• Establish battery module production readiness: define equipment/station requirements, develop procedures, and set in-process and end-of-line test checkpoints 

• Collaborate with systems engineering to ensure battery technical characteristics (limits, fault behavior, comms) are reflected in overall energy storage system design 

• Manage and coordinate with battery module suppliers and subcomponent vendors on requirements, changes, and technical deliverables 

• Serve as the main contact for third-party lab testing of new battery equipment (e.g., protection tests, BMS communication testing, thermal validation, integration with Fluence controls, telemetry points, mechanical fit/installation) 

• Gather supplier data on thermal behavior of battery modules in operation and partner with enclosure design teams to size cooling solutions for key applications 

What does a qualified candidate bring to Fluence? 

• Bachelor’s degree (or higher) in Electrical Engineering, Mechanical Engineering, or equivalent 

• 5+ years of experience developing and testing high-voltage battery systems (integration, verification, and validation) 

• Experience in manufacturing/industrialization of battery cells or modules (process readiness, EOL test, quality controls) 

• Broad technical knowledge across engineering disciplines (electrical, electronics, mechanical, thermal, materials, safety, test/validation, manufacturing) 

• Global mindset with experience working in an international, multi-cultural matrix environment (cross-site teams and suppliers) 

• Strong verbal and written communication skills (English required; Chinese is a plus), including clear technical documentation 

• Self-starter who is results-oriented and process-driven, with disciplined change/configuration control 

• Strong problem-solving skills, including structured root-cause analysis and data interpretation 

• Willingness to travel frequently primarily within the US 

• Energy storage industry experience preferred but not required