Lithium battery helium

How helium is used in a battery test?

In that case a process called “bombing” is used. The battery cell is exposed to helium under high pressure prior to testing: helium can then penetrate into the cell through any leak. The part or cell is placed in a vacuum chamber, and test gas leaking out of the part can be detected. The bombing method is mainly used for prismatic and pouch cells.

Can you add helium to a battery cell?

Sometimes it is not possible to add helium to the individual battery cell. In that case a process called “bombing” is used. The battery cell is exposed to helium under high pressure prior to testing: helium can then penetrate into the cell through any leak.

What are lithium ion battery cells used for?

Lithium-ion battery cells are used in a variety of applications, for instance, by smartphone and tablet manufacturers or in the booming industry for e-mobility. Battery cells can be of different types: pouch, cylindrical, prismatic or coin cells.

What are the different types of lithium ion batteries?

2 Li(s) + 2 H2O(l) & 2 LiOH(aq) + H2(g) The most common types of cells used for lithium batteries are cylindrical, prismatic, and pouch cells. Regardless of type, all batteries must be air and watertight to avoid catastrophic breakdown due to the reaction of lithium ions with water. Figure 1. Common lithium‐ion battery types.

What happens if a lithium ion battery leaks?

Leaks in lithium-ion battery cells can shorten battery life and deplete energy capacity. Leaks also can allow moisture to enter the battery system. Water ingress can lead to a complete failure of the battery or create a potential fire hazard.

What is the helium tracer-gas leak-rate test limit for lithium-ion battery cells?

A helium tracer-gas leak-rate test limit of 10-6 mbar∙l/s would apply for all three types of lithium-ion battery cells. While leak-rate test limits are the same for all three battery cell types, pouch-cell testing presents a unique challenge.