In recent years, driven by the rapid growth of new energy vehicles, the installed capacity of power lithium batteries has exceeded the proportion of lithium battery consumer markets. The focus of demand for lithium batteries is in the development stage of shifting from the small battery market in the consumer battery market to the power battery market for electric vehicles and industrial & energy storage.
Power battery is the most critical factor in the development of new energy vehicles, from the customer's point of view, to make electric vehicles can compete with fuel vehicles, the key is to develop highly specific energy, high specific power, the long service life of high-efficiency batteries as a power source. Therefore, higher precision and intelligent detection in the production process of power batteries are particularly important. EGON sensors have a comprehensive sensor solution for this production process, and today we introduce several typical processes for lithium battery production and the application of EGON sensors in this field.
Electrode production
Application: Power battery liquid injection machine, the liquid injection process is automatically completed, each station is designed with a manual inspection station and adopts non-stop safety process inspection. Safety products are required for channel protection.
EGON products: Safety light grids or safety door locks for reliable access protection and safety relays for centralized control of safety systems.
Application: The homogeneous coating of the electrodes determines the future battery quality. The measurement accuracy must be in the micrometer range when checking the coating thickness.
EGON products: High-precision displacement sensors with their high sampling frequency of 80KHz can meet the calculation of coating thickness immediately after application. This allows adjustments to be made before the drying process to minimize rejects.
Application: Accurate detection of tabs or pre-set color markers by contrast sensors to accurately cut or count polar pieces.
EGON intelligent products: contrast sensing accurately distinguishes colors through the RGB principle, extremely high response speed to achieve higher cutting accuracy, and binocular technology makes the sensor more stable in detecting glossy materials. The contrast fiber amplifier EX-C can also be used in conjunction with the EX series fiber optic probe to accommodate compact installations at stations where installation is limited, and the cutting accuracy is guaranteed with fine grayscale chromatic resolution and a response frequency of up to 32KHz.
Application: During the unwinding process, the edge of the pole piece needs to be corrected so that it starts winding in the correct attitude.
EGON Smart Products: The guiding sensor series achieves stable guiding with an accuracy of 0.03mm. The product is based on the principle of grayscale contrast, the real-time output of 4-20mA analog feedback edge position information without teaching, debugging, and extremely simple operation; It is also available in retroreflective and diffuse reflection types, which can be flexibly adapted to installation and inspection needs.
Application: During the winding process, it is necessary to correct the pole piece with high precision to ensure that the pole piece and its components are assembled in the correct position and that the battery cell (cell) that meets the standard is wound.
EGON Smart Products: Guiding sensor series with an accuracy of up to 0.005mm for high-precision edge detection; the solid and compact form factor allows it to be installed in limited spaces; and with status display, easy to operate and commission.
Application: In the lithium battery assembly and detection line, the photoelectric sensor detection unit is required to detect the bit, and the surface of the battery is made of high-brightness material, which requires stable detection performance.
EGON intelligent products: with laser technology, bright and concentrated light points, convenient for debugging and installation; Stable performance, anti-ambient light interference, reduce the risk of misjudgment.