Working principle of photovoltaic laminating machine

　　      Photovoltaic laminating machine is a device used in the production process of solar panels, mainly used to laminate and package multiple layers of solar cells and glass panels to form a complete solar cell module. No matter which type of operation the laminating machine is applied to, its working principle is the same. That is to apply a certain pressure on the surface of multiple layers of material to tightly press them together. The different things vary depending on the purpose of lamination, and the conditions for lamination are also different.

     The specific working principle is as follows: first, place the laid battery into a laminating machine, evacuate the air inside the component by

vacuuming, and then heat it to melt EVA (ethylene vinyl acetate copolymer), bonding the battery, glass, and backplate together; Finally, cool

down and remove the components.

     To achieve optimal results, the working parameters of the laminating machine need to be precisely controlled, including laminating

temperature, pressure, etc. Correspondingly, the lamination temperature corresponds to the melting point of EVA. In practical operation, the

laminating machine currently used in production is mainly an oil heating laminating machine. It mainly heats the heat transfer oil to the set

temperature in the heater, and then circulates the heated oil under the heating plate through the pipeline to make the heating plate reach the

set temperature.

     It is worth noting that the operation of the laminating machine not only affects the appearance of the solar panel, such as making the

bubbles in the solar panel meet the requirements in the table, but also determines whether the viscosity and bonding strength of the solar

panel adhesive meet the standards. Therefore, lamination process is a crucial step in component production.

     Secondly, common issues with photovoltaic laminating machines

     The photovoltaic laminating machine may encounter a series of problems during use, including fragments in the components, bubbles in

the components, abnormal equipment operation, etc.

     There are fragments in the components: There may be multiple reasons, such as uneven welding during the welding process, tin deposits or

slag, and crushing of the battery cells during vacuum pumping; The battery cells already have hidden damage, and with premature layer

pressing, EVA still has good fluidity; When lifting the component, the gesture is unreasonable, and both hands have already pressed against the

battery cell; Excessive pressure.

     There are bubbles in the component: possible reasons include EVA has been cut, left for too long, and it has absorbed moisture; The EVA

material itself is impure; The vacuum was too short, and the pressure could no longer drive out the bubbles; The pressure of lamination is

insufficient; The uneven temperature of the heating plate causes local premature curing, etc.

     Bubble problems caused by abnormal equipment operation, insufficient vacuum pumping capacity, etc.: This may be caused by equipment

failure, and the machine should be tested to identify the damaged parts.

     I don't know if you have heard the working principle of the photovoltaic laminating machine mentioned above. If there is anything else you

are not clear about, you can consult us by phone. Zhongbu Qingtian is a professional manufacturer of photovoltaic module production line

equipment.