Cell Testing Engineer

Joby Aviation Inc.•San Carlos, CA

31d

About The Position

Joby Aviation is seeking a hardworking, innovative, and passionate engineer to help take our cell testing to the next level. This person will be part of the team focused on developing and quantifying the performance metrics unique to EVTOL applications and be engaged in all levels of cell-testing, including design-of-experiments, test protocol development, and data analysis and interpretation. This person will be integral to driving insights that impact design decisions related to the battery architecture and will work closely with design, safety, electrochemical, and simulation engineers to make our design the best in the industry.

Requirements

MS or above in in materials science, chemistry, electrical engineering, or related field
Experience with large-scale, structured li-ion testing operations and programming cell cyclers (e.g. Arbin, Maccor)
Strong critical reasoning mindset and capable of interpreting and making testing decisions based on first principles and academic research
Experienced in statistical analysis and data visualization with great written, verbal, and presentation skills
Deep understanding of the relationship between physical cell design parameters and the inputs/outputs of mathematical models
Willingness to get hands dirty and work with team-members on all levels of test execution, whether it be performing fixturing modifications or performing calibrations

Nice To Haves

Doctoral degree in a relevant engineering or science field
Experience in lithium-ion cell design, cell qualification, cell manufacturing, battery module design, and/or supply chain
Experience in developing empirical or physics-based models of dynamic systems, preferably including lithium-ion batteries and their aging mechanisms
Understanding of cell failure mechanisms and experience with abuse testing methods
Strong background in Python or other language for data processing and visualization
Familiarity with data pipelines and querying relational databases such as SQL
Sensing and data acquisition knowledge

Responsibilities

Develop novel and targeted methods of characterizing cell performance as they relate to aircraft performance and regulatory requirements
Define comprehensive performance criteria for new cell designs, encompassing electrochemical, mechanical, and safety requirements, in partnership with internal engineering teams
Own test planning and execution for validation of new cell technologies, root-causing of degradation/failure mechanisms, and battery algorithm certification
Actively monitor data, trouble-shoot tests and equipment, and use data manipulation and visualization skills (e.g., Python, MATLAB) to effectively convey complex model and test results to fellow engineers and cross-functional teams
Process data for parameter estimation and develop simulations and models to conduct sensitivity studies for cell design relative to aircraft performance metrics such as range, lifetime, and product value
Synthesize complex technical test results into clear, program-level impacts and support key engineering decisions by acting as the primary point of contact across internal and external organizations