AVL Direct Cooling Technology

Highly accurate measurements for research and development testing.
direct cooling

OEMs, battery, and cell suppliers must continuously innovate and test new battery cells to meet the demands of the evolving automotive market. Key parameters in battery development include capacity, power, and life cycle analysis. Cell testing involves simple units under test (UUTs) that require high flexibility in testing processes and methodologies, unlike battery packs which necessitate a different testing system.​

​AVL is pioneering a novel battery cell conditioning method designed for ultra-high precision coulometry (UHPC) measurements. This innovative approach optimizes battery testing by tightly controlling thermal and electrical parameters, resulting in more accurate performance analysis.

Following this novel approach involves testing various battery cells under highly controlled and stable conditions. As the demand for cells with greater capacity, power, and longevity continues to rise, AVL and the University of Bayreuth have conducted in-depth research to enable more precise life cycle and performance assessments. Essentially, battery cells are surrounded by liquid-cooled conditioning plates (either at the bottom or side). By managing temperature more effectively, direct cooling supports the comprehensive testing required to meet the stringent demands of today’s electric vehicle market.​

direct cooling

Specifications

  • The reference solution enables more efficient cell R&D and conformity of production (COP) testing​

  • R&D testing equipment with AVL’s high accuracy cell tester offers high charging and discharging currents for cell validation.​

  • The water-cooling approach adds a very accurate, high dynamic temperature control.

Temperature range

-40 °C to +80 °C

Cell conditioning

via cell conditioning plates

Temperature change (25 °C to 45 °C, battery cell housing)

85 % time reduction

Control accuracy of fluid temperature

+/- 0.5 °C

Max. UUT temperature gradient

up to 25 K/min

 

High Thermal Stability

Due to precisely defined conditions, reliable test results and consistency throughout the process is maintained.​

Uniform Temperature

The consistent temperature distribution across the entire battery cell surface, creates an optimal environment for accurate evaluations.​

Highest Accuracy

Unparalleled measurement precision enables ultra-high precision capacity (UHPC) assessments when combined with the AVL Battery Cell TS™, enhancing performance analysis.​

Material Testing

Earlier and relevant test results are facilitated by closely mirroring the conditions of future battery modules and packs.

AVL Battery Cell TS™

A battery cell test system is a testbed that includes at least one temperature chamber suitable for testing lithium-ion batteries, a cell cycler in the appropriate current and voltage range, and an automation system. The size of the cell determines which of the various chambers with special safety equipment is required. In addition to the chamber, the cell cycler and the required current and voltage ranges must be  aligned with the respective cell.

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Lab Management Software Solutions

ACORA offers maximum efficiency in large test laboratories. Our AVL Lab Management Software Solution is the ideal complement. This is used for data and process optimisation to ensure the most efficient use of the test laboratory.

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dominik strasser

AVL's direct cooling technology enables faster, more accurate, and higher-quality test results for battery cell testing. In particular, the liquid-based cooling application stands out as one of the most innovative approaches.

– Dominik Strasser, System Line Manager, AVL List GmbH

AVL Battery Testing Solutions – Brochure

Learn more about our holistic battery testing portfolio and solutions.

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AVL Direct Cooling Technology – Solution Sheet
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AVL Battery Testing Solutions – Whitepaper

Learn more about our testing approach and solutions offerings.

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