1. Laminated component bonding and sealing to the frame
The assembly requirement for the frame and the laminated component is to ensure a tight fit and secure connection. The laminated component and the frame are bonded together with an adhesive to create a continuous, high-strength connection, which significantly enhances the load-bearing capacity and overall rigidity of the solar cell module while achieving a more uniform stress distribution; the cured adhesive layer possesses excellent elastic deformation capability, enabling it to accommodate the thermal and external mechanical deformations encountered during the operation of the solar cell module.
2. Solar cell encapsulation with glass and backsheet
Glass, solar cells, and backsheet materials must be encapsulated using adhesives; these adhesives must not only provide excellent electrical insulation performance but also possess the following characteristics: high light transmittance; UV stability (preventing yellowing); and sufficient elasticity to prevent the solar cells from cracking under thermal deformation or external mechanical impact.
3. Wiring box bonding
After the solar cell module is fully encapsulated, the junction box must be bonded to the backsheet using an adhesive. This requires the adhesive to exhibit excellent bonding performance with various types of backsheet and junction box materials. To ensure that the junction box does not detach from the backsheet even under localized mechanical loads after prolonged aging, the adhesive must possess superior tear resistance and aging resistance.
4. Wiring box potting
The insulation performance of components within the junction box must meet stringent requirements; under abnormal operating conditions, significant currents may flow through the bypass diode, causing it to generate heat. To enhance the junction box’s thermal management and insulation performance, encapsulant should be applied to provide moisture-proof and shock-resistant protection.
5. Silicon rod cutting process – Bonding
Silicon rod cutting is a critical step in the manufacturing process of solar photovoltaic cells. This process is used to process solid silicon ingots, whether made of monocrystalline or polycrystalline silicon. A wire saw first cuts the silicon ingot into square blocks, which are then sliced into very thin silicon wafers. This process requires the use of adhesives—for example, epoxy adhesives—to bond the silicon rods to the glass substrate.