The X-ray "online surface density measuring instrument", also known as the "online weighing instrument" or "online thickness measuring instrument", can measure the surface density of thin film products online and can be used to

Convert the characteristics of the film into weight, thickness, etc.

XIntroduction to the principle of X-ray online weighing instrument

1. Measurement principle: The mass of a polarizer per unit area is called the areal density of the polarizer. The surface density of the polarizer is the most important factor determining the consistency of the battery. adopt

The X-rays generated by the X-ray tube are partially absorbed by the battery electrode when they penetrate through it. Resulting in a relative increase in radiation intensity after penetrating the polarizer compared to the incident radiation intensity

oneFixed attenuation. The attenuation ratio has a negative exponential relationship with the surface density of the penetrated polarizer. Detecting the radiation before and after passing through the polarizer by filling it with a special gas ionization chamber

Strong LineDegree can be used to calculate the surface density of the polarizer. As shown in the following figure,I₀To measure the radiation intensity before transmission,IFor the transmitted radiation intensity, both satisfy

I=I₀exp(-um)The relationship. Among them, u is the radiation absorption coefficient of the unit surface density polarizer, and m is the surface density.

2. The advantage of using X-rays to measure extreme surface density is that the energy of X-rays is determined by an internal high stability high-voltage power supply and will not decay over time, ensuring a long measurement time

Period stability. The X-ray energy used for measuring lithium-ion electrodes is relatively low, and the radiation dose to the surrounding environment is small, making it easier to apply for a national license.

3. Suitable coating type:

Single gap coating, multi gap coating, continuous coating, single-sided coating, double-sided coating

4. Suitable for polarizer types:

Positive electrode plate

5. Measurement method:

Online dynamic non-contact measurement

Main technical parameters of X-ray online weighing instrument

1. Measurement range: 0-1000g/m2

2. Repetition accuracy: ± 1 ‰ or>0.33g/m2

3. Scanning speed: 5-18m/min adjustable

4. Radiation type: X-ray (tube)

5Measurement principle:Measurement of Radiation Attenuation Rate

6. Suitable products: cathode electrode sheet, copper foil, aluminum foil

7. Direct measurement indicator: surface density

8. Radiation protection indicators:Exemption standard GB18871-2002

9. Service life: 2 years (replacement of X-ray tube)

10. Drive system: high-precision servo drive

11. Scanning frame type: C-frame/O-frame (optional)