Electronic car battery bottom cover with high speed electrostatic rotating bell spray system for 100-120 micron film thickness spraying

firstly  the electronic car battery box cover 100-120U insulating paint film thickness insulating paint new energy vehicle battery bottom cover spraying

Spray 100-120 micron insulation paint on the bottom cover of electronic car batteries, with the core of ensuring uniform film thickness and edge coverage, while also considering efficiency and cost.

What are the difficulties in spraying the bottom cover of electronic car batteries?

1、 Edge Coverage and Uniformity Challenge

The edges and corners of the battery bottom cover are prone to uneven spraying, resulting in insufficient or excessive film thickness, which affects the insulation performance. In traditional craftsmanship, the coating thickness on sharp edges may be severely insufficient, increasing the risk of breakdown.

2、 Process stability and parameter control

The spraying angle, distance, speed and other parameters need to be accurately matched, otherwise stripes or uneven thickness may occur. For example, it is recommended to spray at an angle of 30-45 degrees, a distance of 200-300mm, and a speed of 30-50cm/s. In addition, the light intensity and dose in the UV curing process also need to be strictly controlled. For example, when the UVA light intensity is 1900mW/c ㎡ and the light dose is 2300mJ/c ㎡, the 50-70 micron coating can be cured in a few seconds.

3、 Detection accuracy and equipment limitations

High precision equipment is required for film thickness detection, such as optical interferometric thickness gauges (with an accuracy of 0.1-100 micrometers), but some devices can have errors of up to 1-2 micrometers. In addition, the surface condition of the substrate (such as the flatness of the zinc layer) can also affect measurement accuracy.

Can the high-speed electrostatic rotary bell liquid spray gun achieve insulation paint spraying with a film thickness of 100-120U?

Sure, like the HDA-605 high-speed electrostatic rotary bell spray system achieve insulation paint spraying of 100-120 microns, but there are several key points to note:

1、 Core parameters for film thickness control

Voltage: It is recommended to control it between 50-80V. Excessive voltage can cause edge sagging, while insufficient voltage can result in insufficient painting rate.

Spinning cup speed: It is recommended to lower the speed slightly for color paint, but it can be increased for medium/clear paint, but it needs to be matched with the flow rate to avoid orange peel caused by excessive drying.

Spray distance: 200-300mm is more suitable. If the distance is too far, the voltage will decrease and the film thickness will become thinner; If it is too close, it is easy to accumulate.