Improving the performance of thermal systems

Our vision: this business will be your key in the next decade to winning a significant market share
The zero-emission technologies that Exoes can help you with: batteries, hydrogen fuel cells or heat pumps.

For manufacturers and equipment suppliers:

Exoès co-develops future thermal management systems to improve their cost/benefit ratio. We are involved from the drafting of the specifications to vehicle integration.

For fluid manufacturers:

Exoès brings you an understanding of the application for which your fluids will be used and helps you continuously improve their performance and your market share.

Generate unique data for the automotive sector

Each year, our clients save 30-40% in terms of development time with a high level of service and quality.

Manufacture of representative
prototypes

Manufacture of customised test
benches delivered to our customers
or used internally

Representative tests for
the automotive sector

0D, 1D, 3D simulation
correlated with test results

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360° engineering

Exoès provides you with all its skills in thermal, mechanical, fluid, electronic and electrical engineering for a perfect integration of all components in a system.

In addition, we have developed agile processes to significantly optimize our lead times and thus help you meet the requirements of the automotive sector.

Our thermal management solutions

Immersion cooled
batteries

Thermal management systems for immersion cooled batteries and comparison with water-glycol cold plate cooling. The components developed: modules for 3 types of cells: cylindrical, prismatic or pouch. The benefit for you? We offer you the possibility of going as far as the production of complete battery packs with our JV e-Mersiv.

Heat pumps

We design, prototype and test complete heat pump / air conditioning / chiller systems and their monitoring. The components developed: compressors, pumps, valves. Flammable fluids tested on site.

Our offerings and skills are constantly evolving.

We are also involved in the development of other thermal management systems for the following components: fuel cells and hydrogen storage, power electronics, electric motors and the integration of complete cooling systems in an electric vehicle (battery cooling system, electric motor, power electronics).

Rankine
systems

We design, prototype and test complete exhaust heat recovery systems and their control. The components developed: expanders and pumps. Flammable fluids tested on site.

Our news on thermal management

Scientific publications

Mouad Diny
Thomas Reiche
Laurent Abbas
Loic Chereau
Michael Matthias

Customer testimonial

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Immersion cooling of batteries

battery
batterie

The customer is a European car manufacturer in the top 5 worldwide

Duration of the program: 22 months in 3 phases

Cell type: NMC > 60 Ah

Role of Exoès before the beginning of the program: participation in the drafting of the specifications, advice and sharing of experience on the definition of the evaluation and validation program of different technologies and different immersion cooling fluids. Support for decision making on the split between simulations and real tests.

The customer’s need

-Define the ideal fluid for monophasic and diphasic cooling
-Carry out an evaluation of the series cost of a complete cooling system according to different cooling architectures
-Calculate the impact of different immersion cooling architectures on the mass of a vehicle
-Design a representative battery module
Test this module in performance
Test the module safety with an abuse test (nail puncture test)
Define an ageing test protocol with several fluids
Characterize the cell to determine the maximum C-rate at a defined maximum temperature
-Design and manufacture electrical heating elements representative of the heat losses of tomorrow’s cells and assemble them into modules
-Carry out thermal performance simulations and correlate them with test bench measurements

Exoès had to adapt its test benches, develop new battery module prototypes, carry out the tests and analyse all the data, carry out the simulations and correlate the simulations with the test results obtained. In addition to these technical activities, an analysis of the projected costs in series as well as a definition of the specifications of the ideal fluid were carried out by our teams.

Immersion cooled batteries for a fluid manufacturer

The customer is a US based fluid manufacturer among the worldwide leaders

Duration of the program: 15 months in 2 phases

Role of Exoès before the beginning of the program: complete definition of the evaluation and validation program of different immersion cooling fluids.

The customer’s need :

-Compare the performance of different fluids for monophasic and diphasic cooling by carrying out tests on existing prototypes and test benches at Exoès

-Evaluate the series cost of a complete cooling system for a given module architecture.

-Publish a white paper for car manufacturers explaining how to fill and drain the fluid and clean the module and battery pack

-Define the sensitivity of the fluid to water absorption and pollution

-Characterize fluid mixtures and define the method for mixing and ensuring homogeneity

-Build a battery module for comparative abuse tests between different fluids

Exoès set up a complete technical roadmap for the battery fluid validation process. We had to develop new test benches and adapt existing ones, develop new battery module prototypes, carry out the tests and analyse all the data. An analysis of the projected costs in series was performed as well as a definition of the specifications of the ideal fluid were carried out by our teams.