Solar cell module laminating process

Abstract

The invention discloses a solar cell module laminating process which comprises the following steps: feeding and covering: a solar cell module enters a space between two vertically adjacent laminating assemblies, and then the two adjacent laminating assemblies are laminated together; vacuumizing: firstly, independently vacuumizing the lower vacuum chamber, and then jointly vacuumizing the upper vacuum chamber and the lower vacuum chamber; pressurizing and laminating: stopping vacuumizing the upper vacuum chamber, inflating the upper vacuum chamber, keeping vacuumizing the lower vacuum chamber, and extruding the solar cell module by the silica gel pad under downward air pressure; then the inflation of the upper vacuum chamber is stopped, and the solar cell module is continuously subjected to the pressing force of the silica gel pad; and uncovering: stopping vacuumizing the lower vacuum chamber, inflating the lower vacuum chamber, vacuumizing the upper vacuum chamber, enabling external atmosphere to enter the lower vacuum chamber, and then separating the two adjacent laminated assemblies. The pressure difference between the upper vacuum chamber and the lower vacuum chamber can be avoided, air residues are avoided, and the vacuum effect is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of solar cell assembly manufacturing, and more particularly to a solar cell assembly lamination process. Background Art

[0002] Solar cell modules can convert solar energy into electrical energy and are usually used in photovoltaic power generation systems. With the advancement of technology and the reduction of costs, solar cell modules will play an increasingly important role in the future energy structure.

[0003] Laminators are important equipment for encapsulating and manufacturing solar cell modules. At present, the process steps for manufacturing solar cell modules using laminators are usually as follows: the solar cell module enters the lamination chamber formed between two adjacent lamination modules, the cover is closed, the upper vacuum chamber and the lower vacuum chamber are evacuated at the same time, pressurization and lamination pressure are applied twice, and the cover is opened. This process is relatively mature and has been widely used.

[0004] However, the existing solar cell module lamination process has the following main problems: 1) The upper vacuum chamber and the lower vacuum chamber are evacuated at the same time. Due to the difference in space or gas exhaust path, a pressure difference will be generated between the upper vacuum chamber and the lower vacuum chamber, resulting in residual gas and the inability to guarantee the vacuum effect; 2) Only two pressurizations are performed, that is, the vacuum degree is reduced in two times, which makes the vacuum degree adjustment span too large, affecting the vacuum evacuation stability.

[0005] Therefore, providing a stable and reliable solar cell assembly lamination process is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0006] In view of this, the present invention provides a solar cell module lamination process to solve at least one of the above-mentioned technical problems.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A solar cell module lamination process comprises the following sequential steps:

[0009] 1) Feeding and covering: The solar cell module is placed between two adjacent lamination modules, and then the two adjacent lamination modules are pressed together;

[0010] 2) Vacuuming: First, evacuate the lower vacuum chamber alone, and then evacuate the upper vacuum chamber and the lower vacuum chamber together;

[0011] 3) Pressurized lamination: stop evacuating the upper vacuum chamber, inflate the upper vacuum chamber, keep evacuating the lower vacuum chamber, the silicone pad is subjected to downward air pressure, and the solar cell module is squeezed; then stop inflating the upper vacuum chamber, and the solar cell module continues to be pressed by the silicone pad;

[0012] 4) Opening the cover: Stop evacuating the lower vacuum chamber, inflate the lower vacuum chamber, evacuate the upper vacuum chamber, let the outside atmosphere enter the lower vacuum chamber, and then separate the two adjacent laminated components.

[0013] By adopting the above technical solution, the beneficial effects of the present invention are:

[0014] Before the upper vacuum chamber and the lower vacuum chamber are evacuated together, the lower vacuum chamber is evacuated first, which can avoid pressure difference between the upper vacuum chamber and the lower vacuum chamber, and avoid residual air, thereby ensuring the vacuum effect.

[0015] Furthermore, in step 2), the lower vacuum chamber is first evacuated for 8-12 seconds, and then the upper vacuum chamber and the lower vacuum chamber are evacuated together for 300-350 seconds.

[0016] Furthermore, in step 2), the final vacuum degrees of the upper vacuum chamber and the lower vacuum chamber are both -90 to -100 kPa.

[0017] Furthermore, in step 3), the decrease of the vacuum degree in the vacuum chamber is divided into three stages:

[0018] Stage 1: Pump the vacuum degree of the lower vacuum chamber to -75 to -71 kPa and maintain it for 30 seconds;

[0019] The second stage: the vacuum degree of the lower vacuum chamber is pumped to -55 to -50 kPa and maintained for 20 seconds;

[0020] The third stage: the vacuum degree of the lower vacuum chamber is reduced to -30 to -25 kPa and maintained for 150 seconds.

[0021] The beneficial effect of adopting the above further technical solution is that the decrease of the vacuum degree in the lower vacuum chamber is divided into three stages, that is, three times of pressurization, so as to reduce the span of each vacuum degree adjustment and improve the vacuum pumping stability.

[0022] Furthermore, the step of heating the heating plate is performed at the latest in step 3). DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The embodiment of the present invention discloses a solar cell assembly lamination process, comprising the following sequential steps:

[0025] 1) Feeding and covering: The solar cell assembly enters between two adjacent laminating assemblies, and then the two adjacent laminating assemblies are pressed together to form a laminating chamber. The laminating chamber is divided into an upper vacuum chamber and a lower vacuum chamber distributed up and down by a silicone pad. The solar cell assembly is located in the lower vacuum chamber. In this embodiment, the solar cell assembly is transported between the two laminating assemblies by a conveying mechanism. The conveying mechanism is a belt drive or a roller drive, which is not limited here; and the two laminating assemblies are pressed together by a lifting mechanism. The lifting mechanism is a hydraulic cylinder or other structure that can drive the adjacent laminating assemblies to lift and press together, which is not limited here;

[0026] 2) Vacuuming: first, evacuate the lower vacuum chamber alone, and then evacuate the upper vacuum chamber and the lower vacuum chamber together; in this embodiment, the time for evacuating the lower vacuum chamber alone is 8-12s, and the time for evacuating the upper vacuum chamber and the lower vacuum chamber together is 300-350s, and finally the vacuum degree of the upper vacuum chamber and the lower vacuum chamber is -90 to -100kPa; in this embodiment, vacuuming is performed by a vacuum pump and a vacuum pipeline, which will not be repeated here.

[0027] 3) Pressurized lamination: stop evacuating the upper vacuum chamber, inflate the upper vacuum chamber, keep evacuating the lower vacuum chamber, the silicone pad is subjected to downward air pressure, and the solar cell module is squeezed; then stop inflating the upper vacuum chamber, and the solar cell module continues to be pressed by the silicone pad;

[0028] 4) Opening the cover: Stop evacuating the lower vacuum chamber, inflate the lower vacuum chamber, evacuate the upper vacuum chamber, let the outside atmosphere enter the lower vacuum chamber, and then separate the two adjacent laminated components to take out or transport the solar cell component products.

[0029] The present invention first evacuates the lower vacuum chamber before evacuating the upper vacuum chamber and the lower vacuum chamber together, thereby avoiding a pressure difference between the upper vacuum chamber and the lower vacuum chamber and residual air, thereby ensuring a vacuum effect.

[0030] Specifically, step 3) the vacuum degree in the lower vacuum chamber is reduced in three stages: the first stage: the vacuum degree of the lower vacuum chamber is pumped to -75 to -71 kPa, and the holding time is 30 seconds; the second stage: the vacuum degree of the lower vacuum chamber is pumped to -55 to -50 kPa, and the holding time is 20 seconds; the third stage: the vacuum degree of the lower vacuum chamber is pumped to -30 to -25 kPa, and the holding time is 150 seconds. This reduces the span of vacuum degree adjustment each time and improves the vacuuming stability.

[0031] Specifically, the step of heating the heating plate is performed at the latest in step 3). In this embodiment, heating the heating plate is performed in step 3) so that the temperature inside the lower vacuum chamber is maintained at 120-130 degrees Celsius.

[0032] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0033] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A solar cell module lamination process, characterized in that: The following steps are involved: 1) Feeding and covering: The solar cell module is placed between two adjacent lamination modules, and then the two adjacent lamination modules are pressed together; 2) Vacuuming: First, evacuate the lower vacuum chamber alone, and then evacuate the upper vacuum chamber and the lower vacuum chamber together; 3) Pressurized lamination: stop evacuating the upper vacuum chamber, inflate the upper vacuum chamber, keep evacuating the lower vacuum chamber, the silicone pad is subjected to downward air pressure, and the solar cell module is squeezed; then stop inflating the upper vacuum chamber, and the solar cell module continues to be pressed by the silicone pad; 4) Opening the cover: Stop evacuating the lower vacuum chamber, inflate the lower vacuum chamber, evacuate the upper vacuum chamber, let the outside atmosphere enter the lower vacuum chamber, and then separate the two adjacent laminated components.

2. A solar cell assembly lamination process according to claim 1, characterized in that: In step 2), the lower vacuum chamber is first evacuated for 8-12 seconds, and then the upper vacuum chamber and the lower vacuum chamber are evacuated together for 300-350 seconds.

3. A solar cell assembly lamination process according to claim 1 or 2, characterized in that: In step 2), the final vacuum degrees of the upper vacuum chamber and the lower vacuum chamber are both -90 to -100 kPa.

4. A solar cell assembly lamination process according to claim 3, characterized in that: Step 3) The vacuum degree in the lower vacuum chamber decreases in three stages: Stage 1: Pump the vacuum degree of the lower vacuum chamber to -75 to -71 kPa and maintain it for 30 seconds; The second stage: the vacuum degree of the lower vacuum chamber is pumped to -55 to -50 kPa and maintained for 20 seconds; The third stage: the vacuum degree of the lower vacuum chamber is reduced to -30 to -25 kPa and maintained for 150 seconds.

5. A solar cell assembly lamination process according to claim 1, characterized in that: The step of heating the hot plate is performed at the latest in step 3).