Hydrogen Tanks

VES have developed the best in class leak detection machine to meet all the demands of testing high pressure hydrogen tanks. Using the knowledge and experience from over 30 years of manufacturing leak detection equipment, VES have developed a unique quantitative leak test for all high pressure tanks.

Battery Cells

How does the industry leak test batteries and battery cells? The industry has many methods of leak testing batteries and cells with no common leak rate standards and regulations. As the automotive industry moves away from the conventional internal combustion engine to the battery electric vehicles. Battery cell production has increased with an approximate 10% CAGR. The need to leak test the battery cells has become more and more important. Vacuum Engineering Services are a world leader in leak testing technology that can guarantee leak tightness across the full range of battery products.

Leak testing battery cells is necessary to stop water and lithium mixing. Lithium reacts intensely with water, forming lithium hydroxide and highly flammable hydrogen. Stopping this water ingress is necessary to maintain product integrity, all parts should be tested to a leak rate of 2 x 10-5 mbar.l/sec. All battery cells must now comply with IP67 or IP68. This states there is no water ingress for 30 minutes in 1 metres of water and no water ingress for 30 minutes in 1.5 metres of water, respectively. This is the equivalent of a leak rate well below 1 sccm, therefore all battery cells must be helium leak tested. Pressure decay and bubble testing will not give battery manufacturers the required accuracy to comply with IP67 and IP68.

  • Methane cells
  • Hydrogen tanks

Vacuum Engineering Services can leak test all battery cells (pouch, cylinder and prismatic), modules and systems to meet customer specific leak rates and requirements.

Battery Coolers

Vacuum Engineering Services have the experience and expertise to deal with any of your leak detection needs. At VES we work with all parties to provide the best possible solution for the application. With electric cars and vehicles seeking longer range; higher powered batteries are becoming necessary. Therefore, battery cooling is a must. Battery thermal management systems are essential to maintain the battery cells performance and prevent thermal runaway.



With the industry using a mix of water cooling and refringent cooling, VES have designed and manufactured a leak detection machine to test both water cooled and refringent cooled loops. Both need leak testing to prevent product failure. With water cooling circuits leak tested to a range of 1e-2 to 1e-3 mbar.l/sec and refringent cooling circuits tested down to approximately 1e-5 mbar.l/sec. All products need testing to comply with IP67. VES has experience in testing to all products to meet IP67, with our accumulation machines testing to 1e-3 mbar.l/sec.

VES are the only manufacturer of leak testing equipment to have designed and built a machine running multiple gases on different circuits simultaneously. Maintaining product reliability while continuing to achieve a short cycle time.

Vacuum Engineering Services can design and manufacture leak detection machines for all applications including cooling/heating plates and battery coolers of different sizes and shapes.

Depending on the leak rate, there are two main methods of testing battery thermal management systems…

The components placed inside a sealed enclosure and charged with a helium tracer gas. Without the use of a vacuum, an accumulation tester provides accurate and reliable testing results at a relatively low cost. A sensor located within the enclosure can measure the quantity of helium, thus detecting any additional amount due to a leak in the component.

For any refringent testing, a hard-vacuum leak detection machine must be implemented. Vacuum Engineering Services can provide expert experience in testing production components for all leak rates and vacuum conditions.

Battery thermal management systems are essential to maintain the battery cells performance and prevent thermal runaway. Thermal runaway is one of the largest causes of failure for lithium battery cells, however good thermal management stops failures and reduces harm. Vacuum Engineering Services work with many of the largest thermal management companies in the world to deliver optimum solutions for their every need.

With everything we do at Vacuum Engineering Services, safety is our highest priority. Maintaining the highest of standards throughout our facilities. All pressure vessels including battery coolers and fuel cells must meet the global regulations. Vacuum Engineering Services have experience in meeting all EU and global standards. Feel free to contact us to discuss further.

Fuel Cells

Fuel cells are made up of layers of material: An Anode, Cathode and Electrolyte. To ensure leak tightness of the cells and optimise performance, a helium leak test must take place. Legalisation and best practice require parts to be tested to a leak rate of 2 x 10-5mbar.l/sec. Vacuum Engineering Service have designed machines for both cells and modules for Hydrogen and Methane Fuel Cells.

Vacuum Engineering Services designs and builds bespoke helium leak detection machines for every application.



As the world moves from internal combustion engines and fuel tanks to more renewable forms of energy; VES are at the forefront of design and manufacturing of leak detection equipment for Hydrogen Fuel tanks. Working at high pressures and high volumes, the potential energy can have catastrophic implications on the surrounding areas. Leak testing of hydrogen tanks create great challenges for the industry moving forward. Vacuum Engineering Services are the only provider of leak detection equipment who has the knowledge and experience of both leak detection systems and high-pressure applications. VES are powered by over 25 years of experience in leak detection and a drive to support all our customers with the most technical application.

With everything we do at Vacuum Engineering Services, safety is our highest priority. Maintaining the highest of standards throughout our facilities. All pressure vessels included battery coolers and fuel cells must meet the global regulations. Vacuum Engineering Services have experience in meeting all EU and global standards. Feel free to contact us to discuss further.

Methane fuel cells, along with any fuel cells, require leak testing and VES can recommend the best methods and technology to achieve efficience and reliably across your product range.