In recent years, frequent accidents in the field of electric vehicles and energy storage have triggered large-scale recalls, and the responsible entities have affected domestic and foreign manufacturers and battery companies. Not only did the brand image of the companies involved be damaged, but the battery companies were also required to bear the huge costs of recalling or replacing the batteries. Especially in the new cycle of large-scale expansion of power batteries, battery companies have increasingly stringent requirements for high-quality control and safety in the production process. As an important checkpoint for battery safety, the importance of lithium battery testing equipment is self-evident. In order to ensure the safety of large-scale capacity manufacturing, power battery companies such as CATL, BYD, China Innovation Airlines, Guoxuan Hi-Tech, EVE Power, and Sunwoda have actively increased the large-scale introduction and application of precision test instruments including digital microscopes.
The emergence of KEYENCE digital microscope not only solves many pain points of visual microscopes, but also makes it more convenient for battery companies to use in actual observation, shooting and measurement, which helps the large-scale manufacturing and safety testing of power batteries, and is being introduced and rapidly penetrated in the field of power battery pole piece testing.
In view of the detection requirements of the pole piece with ** thorns and whether the length is within the specifications, the VHX series digital microscope realizes two detection methods: single-piece mobile detection with large platform fixture and large-scale detection of multiple layers of winding.
Left: VHX series fixture monolithic vertical section burr detection; Right: VHX series winding multi-layer inspection burrs over a wide area.
When observing at high magnification, it is inevitable that the depth of field problem will occur, and the surface of the uneven sample cannot be seen clearly, and conventional products usually need to adjust the focus, but the VHX series can achieve a clear focus of the whole frame with a simple button press, and quickly see the surface.
VHX Series full-frame focus view (top) compared to other microscope renderings (bottom).
Laser cutting technology irradiates the cut battery electrode piece by a high power density laser beam, and the local temperature is quickly heated to a very high temperature, which quickly melts, vaporizes, ablates or reaches the ignition point to form holes. As the beam moves on the pole piece, the hole continuously forms a very narrow slit to complete the cutting of the pole piece. However, the accompanying problem is the generation of huge laser heat affected areas and molten beads.
Left: Bead size, Right: Bead stacking.
Taken together, with its high depth of field, high magnification, and ease of operation, the KEYENCE VHX Series Digital Microscope is an ideal instrument for analyzing components and samples and generating test reports in R&D, production and testing, quality control and assurance, and battery failure analysis.