The liquid crystal display kit for charging piles generally includes acrylic cover plates (or PC cover plates), sheet metal parts, liquid crystal display screens and other components. Another structure consists of a plastic casing, a liquid crystal display screen and other components. Due to the complex structure of the plastic shell and the high cost of mold opening, it is only limited to standardized varieties with large market capacity. These components are generally assembled into an integrated display kit in a liquid crystal factory for supply.

In the protection requirements for charging piles, it is generally required that the highest level on the front be IPX5, and the second digit after IP represents the waterproof grade.

The testing method is as follows: After sealing the back cover of the screen, the water spray test is conducted using the water spray nozzle of the specified water spray testing machine. The spray Angle is 360°, the nozzle diameter is 6.3mm, the distance between the nozzle and the sample surface is 2.5 to 3 meters, the water flow rate is 12.5±0.625L/min, and the spray time is 1 minute per square meter, with a minimum of 3 minutes. Finally, observe the internal water ingress situation and ensure that there is no water ingress inside the sample. (Note: There is no waterproof requirement for the back of the screen.) Some enterprises do not use national standards but instead use their internal control standards for testing. That is, they directly spray the sealed LCD kit with a water pipe for a test, which lasts for about several minutes to half an hour. Some enterprises even directly put the kits into containers filled with water and test them for a long time to see if water has entered.

There are various ways to bond LCD screens with plastic shells and plexiglass. After conducting extensive and thorough experiments on multiple materials and process routes, Jiya Company has verified that using 3M's VHB adhesive is the optimal material and developed the corresponding process route.

VHB is a Very High Bonding double-sided foam tape produced by 3M Company. It is not the name of a general-purpose adhesive type but a registered trademark of 3M, specifically designed for high-strength bonding. Viscoelastic foam composed of polyacrylate contains micron-sized closed bubbles inside, and its main chain is resistant to heat, ultraviolet rays and chemicals. Resistant to ultraviolet rays and chemicals, extreme temperatures and humidity. It is widely used in the fields of automobiles, construction, electronics and industry, such as bonding of in-vehicle display systems and fixing of building curtain walls.

The most significant difference between pressure-sensitive adhesives and ordinary adhesives lies in their inherent "viscoelasticity", that is, while they have the ability to flow and wet the surface of materials, they also possess a certain cohesive strength, which means they have the ability to resist external forces and maintain their own undamaged state. The combination of these two capabilities enables it to bond the materials that need to be bonded together. Therefore, pressure-sensitive adhesives do not need to go through physical or chemical curing processes and can be used directly, which is very convenient in operation.

The use of VHB™ tape does not cause stress concentration and offers better appearance quality and service life. It can bond different types of materials and dissipate deformation and stress caused by different coefficients of thermal expansion. It can provide protection for the bonding surface and prevent the occurrence of chemical or potential corrosion. It also has the advantages of simple construction, convenient operation, rapid adhesive bonding and good appearance, which better meets the requirements of large-scale construction.