How do you test a lithium ion battery?

Common lithium‐ion battery types. Testing for leak tightness requires some form of leak detection. Although various leak detection methods are available, helium mass spectrometer leak detection (HMSLD) is the preferred and is being used broadly to ensure low air and water permeation rates in cells.

Why is battery leak testing important?

For this new market, battery leak testing is essential for electric vehicles, for battery packs any leakage can compromise safety, performance, and longevity of the system.

Do electric vehicles need a leak detection system?

In monitoring an electric vehicle’s battery health, leak detection is an absolute necessity, whether the vehicle is charging or on the road. The most important leaks to monitor for in an EV’s battery pack are those that affect its thermal management system, such as:

Which test specimens require helium leak detection?

Individual battery cells: Another demanding test specimen are battery cells, which due to their energy density require much stricter limits for leak testing to ensure the safety in subsequent use. Due to this stricter requirement, compared to its housing often requires the use of Helium leak detection.

How do you conduct a battery leak test?

Fundamental Approach to Contacting: Selecting appropriate contact methods is crucial for conducting leak testing effectively and accurately. Utilizing the Later Electrical Interfaces: A proven approach is to use the existing electrical interfaces of the batteries for testing. This minimizes the effort and increases efficiency.

Are pressure & visual test methods safe for EV batteries?

Historically, pressure and visual test methods have been used for soft-pouch, cylindrical and prismatic cells, however, these methods can be slow, unreliable, and may miss small lithium-ion leaks that, if left undetected, can create big quality and safety problems. EV Battery Testing Solutions