Millbrook has strengthened its UN38.3 battery testing offering with the introduction of a Battery Altitude Test Chamber, able to simulate unpressurised aircraft space.

The new chamber can test some of the largest battery packs for electric vehicles at altitudes above and below ground.

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All lithium batteries must meet UN38.3 criteria before they are transported by land, sea or air. Millbrook’s new Battery Altitude Test Chamber has the ability to simulate unpressurised aeroplane space at altitudes up to 15,000m.

During a UN38.3 altitude test, the battery is stored in the chamber at 11.6kPa for an extended period (>six hours) to simulate the product shipping process.

Following this, it is inspected against a set list of criteria. This includes checking for any mass loss, leaking, rupture or venting.

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The chamber is 3.2m x 2m x 1m, meaning it can test some of the largest battery packs on the market at a variety of altitudes, including negative ones. The ability to set specific positive and negative altitudes means the chamber can simulate air pressures such as those found in mountain ranges or mines, useful for testing electric and autonomous mountain or mining machinery batteries.

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“We are continuing to invest in battery testing equipment and expertise to help our customers get their products to market more quickly,” said chief engineer, Battery, Peter Miller.

The UK’s biggest investment in private battery testing resulted in Millbrook opening its Battery Test Facility in September, 2019 The new Battery Altitude Test Chamber is part of the growth of this capability.

Millbrook can assess the life of battery cells, modules and packs, determine battery safety in a range of situations and validate the performance of automotive batteries in different environmental conditions.