Intern in the Electrical Department - Energy Storage Section

European Space Agency - ESA; Noordwijk; On-site; EUR 13,000 - 20,000; Full time

Job summary

ESA's ESTEC in Noordwijk, Netherlands invites a university student to join the Electrical Department - Energy Storage Section for an internship focused on Li-ion battery modelling and simulation in space applications.

You will work with energy storage and power management engineers, running simulations for launch, in-space and end-of-life scenarios, and contribute to model refinement and testing at our facility.

Qualifications

• Must be a university student, preferably in final or second-to-last year of a Master's program.
• Ability to prove enrolment for the entire duration of the internship.
• Knowledge of Li-Ion battery modelling and simulation and relevant hands-on testing experience.

Responsibilities

• Perform battery simulations using the energy storage models under various mission scenarios.
• Refine and optimise battery models; develop models for new cell types or configurations.
• Plan and execute tests at ESA's battery test facility and analyse results.
• Document models, test plans, and results with clear reports.
• Collaborate with energy storage engineers and test facility team.
• Prepare and present a final project report at end of internship.

Skills

Li-Ion modelling

Data processing

Experiment planning

Documentation

Education

Master's degree in Electrical Engineering / Physics

Tools

MATLAB

Python

LabVIEW

Job description

Intern in the Electrical Department - Energy Storage Section.
Job Requisition ID: 21029
Date Posted: 1 November 2026
Closing Date: 30 November 2026 23:59 CET/CEST
Publication Method: External Only
Type of Appointment (learn more):
Directorate: Technology, Engineering and Quality
Workplace:
Noordwijk, NL

Location

ESTEC, Noordwijk, Netherlands

Our team and mission

Electric energy storage is crucial for all space applications. Batteries are used in launchers as well as in Low-Earth Orbit (LEO), Geostationary Earth Orbit (GEO) and science spacecraft when energy from sunlight is unavailable. The most important characteristic of a space battery is specific energy, measured in Wh/kg. Since most lithium-ion battery developments are currently happening for terrestrial applications, spin-in into the space sector is of utmost importance. Current developments aim to further improve the specific energy of new lithium-ion space batteries.

The Energy Storage Section covers all aspects of energy storage for space applications, typically primary and secondary batteries, fuel cells and supercapacitors. The Section is at the forefront of these developments, leading R&D activities, supporting space missions, and performing independent testing of novel battery technologies in our own battery test facility.

To assess the sizing and performance of batteries for different missions, an independent battery model has been developed and validated. This model will be utilized to simulate different cases, which can occur on the battery during different mission phases.

Candidates interested are encouraged to visit the ESA website: http://www.esa.int

Field(s) of activity for the internship

The aim of this opportunity is to perform battery simulations using our independent battery model in close cooperation with the energy storage engineers and the power management engineers in the team. Different mission scenarios including the launch phase, failure cases, abusive conditions as well as end-of-life performance shall be simulated.

A further task will be to advance the battery models of the Energy Storage Section. Existing models shall be refined and optimised and new models for new cell types or battery configurations may have to be developed. These model developments will be supported by experimental testing at our own test facility.

You will draw up test plans and work closely with all the Section members and the test facility team to implement the tests.

The data will be assessed and the models built based on the experimental results.

During your internship, you will work on the following core activities:

• simulation of Li-ion space batteries performance during different space mission scenarios;
• modelling of Li-ion batteries for space applications;
• refinement of cell and battery models and related documentation;
• definition and testing of battery cells and batteries;
• evaluation of test results and extraction of test parameters;
• writing a comprehensive report and presenting the work at the end of the project.

The scope of work could be expanded to cover the following:

• developing new Li-Ion cell model;
• Li-ion battery abuse testing in space-relevant conditions.

Behavioural competencies

Result Orientation

Operational Efficiency

Fostering Cooperation

Relationship Management

Continuous Improvement

Forward Thinking

For more information, please refer to ESA Core Behavioural Competencies guidebook

Education

You must be a university student, preferably in your final or second-to-last year of university course at Master's level. In addition, you must be able to prove that you will be enrolled at your university for the entire duration of the internship.

Additional Requirements

The working languages of the Agency are English and French. A good knowledge of one of these is required. Knowledge of another ESA Member State language is an asset.

During the interview, your motivation for applying to this role will be explored.

You shall have a demonstrated knowledge of Li-Ion cell and battery technology modelling and simulation along with relevant hands-on experience in testing, data processing and analysis. Knowledge and background in space batteries is an asset.

Diversity, Equity and Inclusiveness

ESA is an equal opportunity employer, committed to achieving diversity within the workforce and creating an inclusive working environment. We therefore welcome applications from all qualified candidates irrespective of gender, sexual orientation, ethnicity, religious beliefs, age, disability or other characteristics.

At the Agency we value diversity, and we welcome people with disabilities. Whenever possible, we seek to accommodate individuals with disabilities by providing the necessary support at the workplace. The Human Resources Department can also provide assistance during the recruitment process. If you would like to discuss this further, please contact us via email at [e-mail].

Important Information and Disclaimer

During the recruitment process, the Agency may request applicants to undergo selection tests.

Applicants must be eligible to access information, technology, and hardware which is subject to European or US export control and sanctions regulations.

The information published on ESA’s careers website regarding internship conditions is correct at the time of publication. It is not intended to be exhaustive and may not address all questions you would have.

Nationality

Please note that applications are only considered from nationals of one of the following States: Austria, Belgium, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, and the United Kingdom.