BESS Thermal Management System Specialist

Job Responsibility:

BESS Thermal Management System Specialist

Wärtsilä Energy Storage is the leading global energy storage optimizer. Our mission is to deliver integrated energy solutions that build a resilient, intelligent, and flexible energy infrastructure - unlocking the way to an optimized renewable future. By integrating renewables, energy management technology, and storage with traditional energy resources, we reinvent clean energy production from the largest and most complex grids to the most remote and essential microgrids. We play a key role in Wärtsilä's vision towards a 100% renewable energy future through flexibility, reliability, and integration and a more sustainable world for us all. As a Senior Battery Thermal Management System (BTMS) Engineering Specialist, you will play a pivotal role in our company's mission to develop cutting-edge power conversion systems. You'll collaborate closely with cross-functional teams, including thermal, electrical, and mechanical engineers, product managers, and R&D specialists. Your expertise will drive innovation, enhance system performance, and contribute to our organization's success. Candidate must be located in Toronto, Canada. Responsibilities:

• Analyze and compare different battery cells and provide detailed analyses based on cell type, material, performance, design, and characteristic
• Collaborate with other labs and research institutes regarding current design concepts, materials, and future products
• Develop and maintain Battery Energy Storage System sizing tool
• Lead the technical discuss and negotiation with different cell vendors
• Support designing and configuring the battery module and cell level BMS
• Evaluate product and system designs and configurations for compliance to relevant industry standards
• Develop test plans for battery cells and execute them in lab environment ensuring compliance to functional and QA requirements
• Participate in field testing and commissioning activities by developing test plans and collaborating with the field engineering team to execute and troubleshoot as needed
• Develop product documentation such as manuals, application notes, and technical specifications
• Collaborate with the larger team to optimize requirement and needs
• Drive continues improvement
• Support marketing research and supply chain initiatives
• Collaborate in a team environment and/or take charge of opportunities to develop optimal solutions for customers and product development programs.
• Design and optimize thermal management systems for containerized Battery Energy Storage Systems (BESS) solutions
• Collaborate on thermal simulation models using CFD and other thermal analysis tools to predict system performance under various operating conditions
• Analyze and compare different cooling technologies and provide detailed analyses based on performance, cost, efficiency, and reliability
• Lead technical discussions and negotiations with thermal management component vendors and suppliers
• Collaborate with electrical, mechanical, and control systems teams to ensure integrated thermal solutions
• Evaluate thermal system designs and configurations for compliance to relevant industry standards and safety requirements
• Act as the primary technical interface with cooling system suppliers and evaluate new supplier technologies
• Develop test plans for thermal management systems and support their execution with lab and in field environments
• Research and implement innovative cooling technologies including liquid cooling, phase change materials, and advanced thermal interface materials
• Develop product documentation such as thermal design specifications, application notes, and technical manuals
• Support BMS integration for thermal monitoring and control systems
• Drive continuous improvement of existing thermal management solutions
• Support marketing research and supply chain initiatives for thermal components
• Collaborate in a team environment and/or take charge of opportunities to develop optimal thermal solutions for customers and product development programs

Minimum Experience and Educational Requirements:

• MS degree in Mechanical Engineering, Thermal Engineering, or related field required; PhD desired
• 10+ years of thermal management systems experience focused on battery or power electronics cooling applications
• Familiar with thermal management system design and manufacturing processes
• Experience analyzing and comparing different cooling technologies and thermal interface materials
• Knowledgeable on thermal testing requirements and equipment for battery systems
• Proficiency with CFD software (ANSYS Fluent, Star-CCM+, or similar) and thermal modeling tools
• Experience with CAD software (AutoCAD, SolidWorks, or similar) for thermal system design
• Able to represent the company in technical meetings with vendors, customers, and other government authorities
• Strong understanding of battery thermal characteristics and thermal management industry requirements
• Knowledge of heat transfer principles, HVAC systems, and cooling technologies
• Maintain positive working relationships with customers, peers, vendors, shop and office in a fast-paced environment
• Able to work with global team members and vendors in different time zones
• Familiar with simulation tools such as Matlab/Simulink for thermal system modeling
• Understanding of international standards (UL, IEC, UN38.3) related to battery thermal safety
• Flexible and willing to adapt and learn new thermal management technologies
• Excellent communication and documentation skills
• Experience with phase change materials and advanced cooling technologies is a plus
• Team player attitude internally and externally
• Willing to travel up to 20% of the time

Last application date: 11/06/2025 Why you and us: You will be a part of a global organization with local presence and work in an exciting and dynamic working environment with highly motivated and skilled co-workers. We offer interesting and challenging work tasks, as well as personal and professional development in a great team. If you feel excited by being a part of this working environment and think your personal skills and qualities match the job requirements, we look forward to receiving your job application. At Wärtsilä we value, respect and embrace all our differences, and are committed to diversity, inclusion and equal employment opportunities; everyone can be their true self and succeed based on their job-relevant merits and abilities. We are not accepting unsolicited submissions from 3rd party recruitment agencies. Successful applicant must be authorized to work in the Canada without sponsorship. We look forward to hearing from you. Qualified candidates must apply online: Individuals hired for positions that require on-site customer interactions and/or in-person travel may be required to be fully vaccinated against COVID-19 or other country-specific vaccinations, unless otherwise prohibited by law. Wärtsilä North America values our employees. We offer a competitive salary and comprehensive benefits package. Wärtsilä North America is an EOE/AA employer. Effective January 2025, Wartsila companies in the USA will implement a new hybrid work model. Most employees who live within 40 miles of an office will work 2 days per week in office. This model will provide our employees the flexibility of working from home, while also providing the benefits of in-person collaboration twice a week. We will be happy to provide more information during your interview process. #esocareers #wärtsiläenergy #LI-Hybrid