The document discusses using x-ray and CT inspection techniques to examine batteries nondestructively. It describes how these methods can be used to check the internal electrode arrangement for defects, understand the cathode and anode layout, measure internal dimensions and alignments, evaluate electrical contacts and identify issues like short circuits or misaligned components. The techniques allow inspection of critical parts like jelly rolls for twisting, cuts or correct dimensions. CT inspection enables evaluation of the battery casing welding and thickness to check for flaws that could cause harm. The methods support full and rapid battery quality control inspection.

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X-ray Inspection of Batteries
Nondestructive Testing

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Batteries are depended upon in 1000s of
different applications.

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From a firefighter’s flashlight….

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…to a mobile device

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…to a defibrillator

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Battery testing and
failure analysis is
important in helping
to improve design
and confirm the
correct function of
internal features. X-ray Testing System

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X-ray inspection
can help you…

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Examine the internal electrode arrangement after
assembly and checks for any defects.

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Understand the layout of the cathode and anode

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Accurately measure
internal linear distances
and alignments

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See the quality of
electrical contacts

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Identify short circuits and
misaligned components

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Lead sheets or
lithium sheets
are rolled
together to
produce a
battery called
a jelly roll.

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With CT (computed tomography), you can see if a jelly role is twisted, if
there is any nicked material, and look for the correct length and fitment.

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Inspection can aid in
identification or
misplaced internals,
and signs of holes
and or voices in the
stacked layers.

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With 4D technology you
can see what happens to
the battery when it’s
depleted vs. non
depleted. You can also
inspect for jelly-roll
concentricity, alignment
and telescoping.
VIDEO: 4D CT of a Battery

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Lithium batteries
have high energy
and can generate
heat. Batteries are
encased in stainless
steel to make sure
they don’t leak or
cause any harm.

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Inspect the welding used to encase the battery.
Make sure the wall is the correct thickness and not too thin.
If the wall is too thin, it could break and cause harm.

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With computed tomography, 100% battery inspection is
achievable. Full inspection can be done in seconds per part with an
automatic pass/fail signal output. For more in depth data, it is
possible to link to factory QC, SPC or SCADA systems. Batch or
laboratory R&D versions are available.
www.4nsi.com