The measurement technology used in the many production steps of battery manufacturing is subject to stringent requirements in terms of accuracy, performance and robustness. For this reason, the use of Micro-Epsilon's high-precision distance sensors, laser scanners and sensor systems enables, among other things, the precise measurement of the thickness of the coatings.
In the battery industry, in-line monitoring of production deviations makes a significant contribution to profitability, resource conservation and quality assurance. The thickness of strip materials and coated films is a decisive measurement variable in this respect. Micro-Epsilon distance sensors, laser scanners and sensor systems have proven themselves in these processes. They offer a reliable solution for many measurement tasks in battery production and are used in many process steps - from electrode production to assembly and forming.
For high-precision thickness measurements, different types of sensors based on different measuring principles can be used. Micro-Epsilon's extensive and varied product range offers the right measuring method with the right sensor for every type of coating and object to be measured.
For web and coating thickness measurements with electromagnetic sensors, two capacitive sensors are attached opposite each other. They measure from both sides on electrically conductive materials. The two linear distance signals of the sensors are calculated in the controller to obtain an accurate thickness value. Compared to optical methods, the measuring spot is larger. This allows structures and irregularities to be averaged. Thanks to the integrated temperature compensation, stable and accurate measurement values are achieved even at high ambient temperatures.
If coating thicknesses are measured with optical sensors, these are also placed opposite each other. The optoNCDT 1900 laser sensors operate with high resolution and can be used in both wet and dry coating processes. Due to the small diameter of the light spots, even the smallest details can be reliably detected. In addition, the measurements are performed with a high dynamic range.
The turnkey thicknessGauge O.EC system detects the thickness of the electrode coating. It uses the innovative combiSensor, which combines an eddy current sensor for measurement on the guide roller and a capacitive sensor for distance measurement on the material surface. The difference in signal provides the exact value of the coating thickness of the electrodes. The sensors are designed so that measurements are reliable and extremely accurate, even at high and fluctuating ambient temperatures.