Global efforts to reduce CO2 emissions are creating a trend toward the electrification of vehicles. Electric vehicles (EVs) have large-capacity lithium-ion batteries (LiBs) and control boards, which are increasingly expected to be in demand worldwide. Since these key parts are also involved in the safety of vehicles, there is a growing focus on the use of X-ray inspection to ensure quality or to improve product yield.
Hamamatsu Photonics has a lineup of products suitable for X-ray non-destructive testing that contributes to the development and manufacture of in-vehicle batteries and control boards.
X-rays are electromagnetic waves with a very short wavelength, high energy, and have the characteristic of penetrating through matter.
When X-rays penetrate a material, attenuation occurs depending on the density and thickness of the target material. X-ray imaging translates this feature with an X-ray detector, which displays the attenuation rate difference of the object as contrast in the image.
During an X-ray non-destructive inspection, you may combine X-ray sources and detectors depending on the application. In general, 1D detectors are used for the in-line inspection of continuously transported objects, while 2D detectors are used for an off-line 3D inspection and structural analysis.
Based on our extended experience in manufacturing a wide range of X-ray sources and detectors, we respond to our customers' needs by offering the most advanced solutions.
Discover our wide range of X-ray sources and detectors necessary for X-ray imaging.
Microfocus X-ray sources have an X-ray focal spot size in the order of micrometers, enabling the acquisition of high-definition X-ray images with minimal blur even when imaging at high geometric magnifications.
Conventional X-ray source vs. MFX
There is a clear difference in the high-resolution image obtained from our MFX solution.
The X-ray TDI camera uses a special CCD readout technology called TDI (time delay integration) to achieve both high-resolution and high-sensitivity images for high-speed inspection. Compared to two-dimensional sensors, the X-ray TDI camera captures the object being transported vertically, acquiring images without distortion in the transport direction.
Inspection by 2D sensor
An image from a 2D detector will be distorted along the length of the sample, due to the geometric set-up. Samples have to be slowed or stopped in order to be imaged. Dimensional measurements cannot be implemented correctly.
Inspection by linear sensor
A more precise image is realized as X-ray is radiated vertically to the object. Linear X-ray detectors allow for continuous movement of the sample. Dimensional measurements can therefore be implemented correctly.
The C12300-121 acquires images at a maximum scanning speed of 50 kHz. It is ideal for high-speed inspection of cylindrical LiBs where objects are carried in continuously.
The C12300-323 is built for capturing images using tube voltages up to a maximum of 180 kV. So even spirally wound LiBs, which are typically thicker and require high X-ray energy transmission to image the position of the electrodes and their layers, are able to be inspected precisely.
The C12300 series acquires distortion-free images in the carrying direction. The positions of the electrodes in laminated LiBs can be precisely inspected by scanning them in their lamination direction. High-resolution, high-speed inspection can be achieved by combining an X-ray TDI camera with a microfocus X-ray source.
The C12300-461B has high sensitivity at the low tube voltage region and its sensors are configured in a staggered arrangement. Even though minute contaminants on thin objects can be detected, it is ideal for the inspection of sheet materials such as cathodes, anodes, and separators on LiBs.
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