CN115473489A - Solar photovoltaic module and preparation method thereof - Google Patents

Abstract

The embodiment of the invention relates to the technical field of solar cells, and discloses a solar photovoltaic module and a preparation method thereof, wherein the solar photovoltaic module comprises: the battery pack comprises a front panel, a first adhesive film, a battery string, a second adhesive film, a back panel and a charge removing protection device, wherein the front panel, the first adhesive film, the battery string, the second adhesive film and the back panel are arranged in a laminated manner; and the two ends of the battery string are respectively provided with a connecting terminal used for being electrically connected with the two poles of the diode, and the electricity removal protection device is respectively connected with the two connecting terminals and used for releasing accumulated charges at the connecting terminals. According to the scheme, the charge accumulation on two sides of the diode of the junction box can be effectively reduced in the process of manufacturing the solar photovoltaic module, and the breakdown failure of the diode is avoided.

Description

Solar photovoltaic module and preparation method thereof

technical field

The embodiments of the present invention relate to the technical field of solar cells, in particular to a solar photovoltaic module and a preparation method thereof.

Background technique

In the solar photovoltaic module manufacturing process, due to the friction between materials and tooling and photovoltaics brought by lighting, charges are formed in the module, and charge accumulation is formed on both sides of the PN junction of the junction box diode; when the charge accumulation reaches a certain After the value is exceeded, electrostatic discharge breakdown (ESD) is prone to occur, resulting in diode failure and affecting the availability of photovoltaic modules.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a solar photovoltaic module and a preparation method thereof, which can effectively reduce the charge accumulation on both sides of the junction box diode during the solar photovoltaic module manufacturing process, and avoid breakdown failure of the diode.

In order to solve the above technical problems, the embodiment of the present invention provides a solar photovoltaic module, including: a stacked front panel, a first adhesive film, a battery string, a second adhesive film and a back plate, and a static elimination protection device; Both ends of the battery string are respectively provided with terminals for electrical connection with the two poles of the diode, and the static elimination protection device is respectively connected to the two terminals for releasing the accumulated charge at the terminals.

Compared with the prior art, the embodiment of the present invention provides a solar photovoltaic module as an intermediate product in the solar photovoltaic module manufacturing process, including a stacked front panel, a first adhesive film, a battery string, a second adhesive film and a back panel. board, as well as an additional anti-static protection device. Among them, the two ends of the battery string are respectively provided with terminals for electrical connection with the two poles of the diode, and the anti-static protection device is respectively connected with these two terminals, so that the accumulation near the terminals caused by light and friction during the manufacturing process The charge is released to prevent diode breakdown.

In addition, the static elimination protection device includes a relay; the relay is used for monitoring the voltage between the two connecting terminals, and controlling the two connecting terminals to be short-circuited when the voltage is greater than a preset voltage. Controlling the short-circuiting of two terminals under specified conditions by means of a relay can realize the control of the charge release process on the terminals; the relay is a miniature relay whose length, width and height are all less than 20 mm.

In addition, the relay is arranged between the first adhesive film and the second adhesive film, and is positioned between the two terminals of the battery string, and the two ends of the relay are connected to the two terminals respectively. The connection terminals are fixedly connected; or, the relay is built in a junction box for accommodating the diode, and the relay is connected to the diode pins in the junction box for connecting the connection terminals. By positioning the relay between the two terminals, or in the junction box, the flexible setting of the relay can be realized, and at the same time, the contact between the relay and the battery slices on the battery string can be avoided, thereby preventing the battery slices from being pressed and causing cracks and scrapping .

In addition, the static electricity protection device includes a short-circuit structure; the short-circuit structure is arranged on the two connection terminals, and is used for short-circuiting the two connection terminals. Directly use the short-circuit structure to short-circuit the two terminals, which is simple and easy to implement.

In addition, the short-circuit structure includes a conductive layer and an insulating layer that are attached to each other; the short-circuit structure is tightly socketed on the two connection terminals drawn out from the backplane through the jacks provided on it, so that The connecting terminal is bent and connected to the conductive layer of the short-circuit structure, and the insulating layer is located between the back plate and the conductive layer to prevent the conductive layer from contacting the back plate. touch. The two terminals are short-circuited through the conductive layer, and the insulating layer blocks and protects the conductive layer, so that the short-circuit effect is better.

An embodiment of the present invention provides a method for preparing a solar photovoltaic module, including: providing a front panel, a first adhesive film, a battery string, a second adhesive film, and a back sheet;

Laminate sequentially in the order of the front panel, the first adhesive film, the battery string, the second adhesive film and the back plate, install the static elimination protection device during or after the stacking process, and operate the static elimination protection device and The terminals at both ends of the battery string are connected to release the accumulated charge at the terminals; the two terminals of the battery string are operated to be electrically connected to the two poles of the diode; the front panel, the first Adhesive film, battery string, second adhesive film and back sheet to form solar photovoltaic modules.

Compared with the prior art, the embodiment of the present invention, in the solar photovoltaic module manufacturing process, during or after the process of stacking the front panel, the first adhesive film, the battery string, the second adhesive film and the back sheet, an additional Laying of electrical protection devices. Among them, the two ends of the battery string are respectively provided with terminals for electrical connection with the two poles of the diode, and the operation of the anti-static protection device is connected to the two terminals respectively, so that the damage caused by light and friction during the manufacturing process near the terminals is eliminated. The accumulated charge is released to prevent diode breakdown.

In addition, the static elimination protection device includes a relay, and the relay is a miniature relay whose length, width, and height are all less than 10mm; the static elimination protection device is installed during the lamination process, and the static elimination protection device is operated to communicate with the static electricity removal protection device. Connecting the terminals at both ends of the battery string includes: after the front panel, the first adhesive film, and the battery string are stacked in sequence, the relay is operated to be placed between the two terminals of the battery string, and the relay is operated to The two ends of the relay are respectively fixedly connected to the two terminals; the second adhesive film and the back plate are operated to cover the battery strings in sequence.

In addition, the static elimination protection device includes a relay, which is built in a junction box for accommodating the diode, and the two ends of the relay are connected to the diodes in the junction box for respectively connecting the two connection terminals. The two pins are respectively connected through the pads; the installation of the anti-static protection device after lamination, and operating the anti-static protection device to connect with the terminals at both ends of the battery string include: The junction box is placed on the backboard, and the two connection terminals of the battery string drawn from the backboard are inserted into the junction box and connected to the two pins of the diode respectively.

In addition, the static elimination protection device includes a short-circuit structure; the short-circuit structure includes a conductive layer and an insulating layer that are attached to each other; the static elimination protection device is installed after lamination, and the static elimination protection device is operated Connecting to the terminals at both ends of the battery string includes: after stacking, operating the short-circuit structure to tightly fit the terminals drawn out from the back plate through the jacks provided on it, and facing towards The backplane bends the connection terminals so that the connection terminals are in contact with the conductive layer of the short-circuit structure, and the insulating layer is located between the backplane and the conductive layer for blocking The conductive layer is in contact with the back plate; before laminating the front plate, the first adhesive film, the battery string, the second adhesive film and the back plate, further comprising: removing the short-connection structure.

In addition, the static removal protection device includes a conductive sheet and a grounding cable; the installation of the static removal protection device during the stacking process, and the operation of the static removal protection device to connect with the terminals at both ends of the battery string, including : In the lamination process, operate the conductive sheet to be arranged between the first adhesive film and the battery string, or between the second adhesive film and the battery string, and make the conductive sheet cover the connecting terminal with a sheet; operate the conductive sheet to connect with the grounding cable; correspondingly, before laminating the front panel, the first adhesive film, the battery string, the second adhesive film and the back panel, also Including: taking out the conductive sheet.

In addition, there are multiple battery strings, and each of the battery strings is connected in series through a bus bar; the making the conductive sheet cover the terminal includes: operating the conductive sheet to penetrate through the multiple On the terminal of the battery string.

Description of drawings

One or more embodiments are exemplified by the pictures in the corresponding drawings, and these exemplifications do not constitute a limitation to the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the drawings in the drawings are not limited to scale.

1 is a schematic diagram of a solar photovoltaic module according to a first embodiment;

2 is a schematic diagram of a battery string according to a first embodiment;

3 is a schematic diagram of a relay according to a first embodiment;

Figure 4a is a schematic diagram of a relay according to a first embodiment;

Figure 4b is a schematic diagram of a relay according to a first embodiment;

Fig. 5 is a schematic diagram of a shorting structure according to a first embodiment;

Fig. 6 is a schematic diagram of a shorting structure according to a first embodiment;

7 is a flow chart of a method for preparing a solar photovoltaic module according to a second embodiment;

Fig. 8 is a flowchart of a method for preparing a solar photovoltaic module according to a second embodiment;

Fig. 9 is a flowchart of a method for preparing a solar photovoltaic module according to a second embodiment;

Fig. 10 is a flowchart of a method for preparing a solar photovoltaic module according to a second embodiment;

11 is a schematic diagram of a conductive sheet and a grounding cable according to a second embodiment;

Fig. 12 is a flowchart of a method of manufacturing a solar photovoltaic module according to a second embodiment.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, various implementation modes of the present invention will be described in detail below in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that, in each implementation manner of the present invention, many technical details are provided for readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in this application can also be realized.

The first embodiment of the present invention relates to a solar photovoltaic module, which is an intermediate product produced in a manufacturing process. As shown in Figures 1 and 2, the solar photovoltaic module includes: a stacked front panel 1, a first adhesive film 2, and battery strings (the example in the figure shows three sets of battery strings S1, S2, and S3, and this embodiment In the above, the layer structure where the battery string is located is summarized as the battery string layer 3), the second adhesive film 4 and the back plate 5, and the static elimination protection device 6; (as shown in Figure 1, terminals a and b of the battery string S1, or terminals c and d of the battery string S2, or terminals e and f of the battery string S3), and the static elimination protection device 6 is connected to the two terminals They are respectively connected (for example, the static elimination protection device 6 is connected to the a and b ends of the battery string S1), and are used to release the accumulated charge at the connection terminals.

Compared with the prior art, the embodiment of the present invention provides a solar photovoltaic module as an intermediate product in the solar photovoltaic module manufacturing process, including a stacked front panel, a first adhesive film, a battery string, a second adhesive film and Backplane, and additional anti-static protection device. Among them, the two ends of the battery string are respectively provided with terminals for electrical connection with the two poles of the diode, and the anti-static protection device is respectively connected with these two terminals, so that the accumulation near the terminals caused by light and friction during the manufacturing process The charge is released to prevent diode breakdown.

The implementation details of the solar photovoltaic module in this embodiment will be described in detail below. The following content is only the implementation details provided for the convenience of understanding, and is not necessary to implement the solution.

As shown in FIG. 2 , the battery string in the solar photovoltaic module of this embodiment is formed by serially connecting battery pieces 31 through solder ribbons 32 . Multiple sets of battery strings can be set in a solar photovoltaic module, and multiple sets of battery strings can be connected in series through bus bars. For example, bus bar bc can realize the series connection of battery string S1 and battery string S2, and bus bar de can realize battery string The series connection of S2 and battery string S3. In the manufacturing process, on the basis of stacking the front panel 1 , the first adhesive film 2 , the battery string, the second adhesive film 4 and the back panel 5 , this embodiment also adds a static elimination protection device 6 . The static elimination protection device 6 is used to connect with the terminals of the above-mentioned battery string, such as the a and b ends of the battery string S1 as shown in Figure 1, to release the accumulated charge at the a and b ends, so as to connect to the a and b ends The diode on it is protected against electrostatic breakdown. Of course, in practical applications, two anti-static protection devices 6 can also be added, one of which is connected to the c and d terminals of S2 respectively, so as to release the accumulated charges at the c and d terminals. The diode is protected against electrostatic breakdown; the other is connected to the e and f terminals of S3 respectively to release the accumulated charge at the e and f terminals, and the diode connected to the e and f terminals is protected against electrostatic breakdown.

In this embodiment, the structure and principle of the static elimination protection device 6 are not limited. Any structural form with the same technical effect as the static elimination protection device 6 of this embodiment belongs to the static elimination protection device 6 of this embodiment. scope of protection. Several implementations of the static elimination protection device 6 provided by the present invention will be described in detail below.

In one example, as shown in FIG. 3 , the static elimination protection device 6 includes a relay 61, and the relay 61 is used to monitor the voltage between the above-mentioned two terminals (such as terminals a and b), and when the voltage is greater than the preset voltage , control the two terminals to short-circuit; the relay is a miniature relay whose length, width and height are all less than 20mm.

Specifically, the relay 61 may be an electromagnetic relay, and an electromagnetic relay generally consists of an electromagnet (E), a normally closed contact, a normally open contact (not shown) and a switch (switch K). The relay 61 is connected in parallel with the diode between the above two connection terminals, and the relay 61 is provided with a preset voltage. When the voltage across the diode (the voltage between a and b) is greater than the preset voltage (the voltage value of the insulation withstand voltage test of the solar photovoltaic module, such as the system voltage*2+1000V), the relay 61 acts, and the switch K is closed, so that The diode is in a short-circuit state, thereby effectively preventing a large current from flowing through the diode and causing the diode to break down. When the voltage across the diode (the voltage between a and b) is less than the preset voltage (the voltage value of the insulation withstand voltage test of the solar photovoltaic module, such as the system voltage *2+1000V), the switch K is turned on to make the diode work normally state.

In one example, as shown in Figure 4a, the relay 61 is arranged between the first adhesive film 2 and the second adhesive film 4 (not shown), and is positioned between the two terminals of the battery string, the relay 61 The two ends are respectively fixedly connected to two terminals (such as terminals a and b); or, in another example, as shown in FIG. Diode pin connections in the junction box for connection to the above terminals.

Specifically, when setting the relay 61, the relay 61 can be directly connected to the terminal on the battery string, so when the position of the relay 61 is arranged, the relay 61 can be set as a miniature relay, and it is set close to the battery string, that is, it is set at the first An adhesive film 2 and the battery string, or between the second adhesive film 4 and the battery string, and positioned between the two terminals of the battery string, thereby forming a laminated structure with the above-mentioned lamination process overall. Designing the relay 61 as a miniature relay with a small volume can reduce its impact on the laminated manufacturing of the solar photovoltaic module, and has little impact on the overall structure size, which is convenient for layout. Or, as shown in Fig. 4b, relay 61 is connected with the diode that is used to be connected with the terminal on the battery string, thereby indirectly realizes that relay 61 is connected with the terminal on the battery string, so when laying out the position of relay 61 , which can be arranged in a component or device containing the above-mentioned diode, such as in the junction box 7 containing the above-mentioned diode. The junction box 7 is provided with two pads 71, which are respectively used to connect the two pins of the diode. The connecting terminals on the battery string pass through and are welded to the pads 71 . The pad 71 is electrically connected to an external device through an electrical connection 73 . In this way, after the terminal passes through the connection hole 72 and is welded to the pad 71, the diode of the junction box 7 is connected to the terminal of the battery string, thereby realizing the connection of the relay 61 to the terminal of the battery string.

When the relay 61 is used as the static elimination device, because the relay 61 can control whether the two terminals are short-circuited according to the voltage at both ends of the terminal, it will not affect the normal operation of the diode, so the final formed after the process is completed The setting of the relay 61 can still be retained in the solar photovoltaic module and will not be dismantled.

In one example, as shown in Figure 5, the static electricity protection device 6 includes a short-circuit structure 62; catch. The setting position of the shorting structure 62 is similar to that of the relay 61. It can be arranged inside the laminated structure or outside the laminated structure such as the backboard 5 (as shown in FIG. 6 ), and is located between the battery string and the backplane 5 leads to the two terminals, used to realize the short connection of the two terminals.

Further, the shorting structure 62 includes a conductive layer and an insulating layer (not shown) that are attached to each other; the conductive layer is in contact with the above two terminals, and the insulating layer is used to prevent the conductive layer from being connected to the solar photovoltaic module. contact with the remaining structure outside the terminal. For example, in FIG. 6 , the shorting structure 62 is tightly socketed on the two connecting terminals (such as a, b) drawn from the backplane 5 through the socket provided thereon, and the connecting terminals a, b are bent and connected to the shorting structure 62 The conductive layer is connected in contact, and at the same time, the insulating layer is located between the backplane 5 and the conductive layer to prevent the conductive layer from being in contact with the backplane 5 . The side of the short-circuit structure 62 facing away from the back plate 5 (the side shown in the figure) is a conductive layer that is in contact with the connecting terminals a and b. Connection; The side of the shorting structure 62 facing the backplane 5 is the above-mentioned insulating layer, and the conductive layer is isolated from the backplane 5 through the insulating layer, so as to achieve a better short-section effect.

When the short-circuit structure 62 is used as the static elimination device, since the short-circuit structure 62 is fixedly connected to both ends of the terminal, the diode connected between the two terminals cannot work normally during the connection, so the formed after the process is completed The setting of the short-circuit structure 62 needs to be removed in the final solar photovoltaic module.

Compared with the prior art, the solar photovoltaic module provided in this embodiment is an intermediate product in the solar photovoltaic module manufacturing process, including a stacked front panel, a first adhesive film, a battery string, a second adhesive film and a back sheet , and an additional addition of static protection devices. Among them, the two ends of the battery string are respectively provided with terminals for electrical connection with the two poles of the diode, and the anti-static protection device is respectively connected with these two terminals, so that the accumulation near the terminals caused by light and friction during the manufacturing process The charge is released to prevent diode breakdown.

The second embodiment of the present invention relates to a method for preparing a solar photovoltaic module. The method is used to prepare the solar photovoltaic module as described in any one of the first embodiment, as shown in FIG. 7, the method includes:

Step 101: providing a front panel, a first adhesive film, a battery string, a second adhesive film and a back sheet;

Wherein, the front panel can be made of glass, and the first adhesive film and the second adhesive film can be ethylene vinyl acetate (Ethylene Vinyl Acetate, EVA), also known as EVA film layer.

Step 102: Laminate in sequence the front panel, the first adhesive film, the battery string, the second adhesive film and the back sheet, install the static elimination protection device during or after the stacking process, and operate the static elimination protection device It is connected to the terminals at both ends of the battery string to discharge the accumulated charge at the terminals.

Conventional solar photovoltaic module manufacturing process mainly includes: cell sorting, welding, lamination, electroluminescent (EL) test before lamination, lamination, EL test after lamination, framing, junction box installation, curing, cleaning , final I-V testing and packaging process. In this embodiment, there are improvements mainly aimed at the stacking process, so the specific processes of other processes will not be described in detail. The so-called lamination process is mainly to stack the above-mentioned front panel, first adhesive film, battery string, second adhesive film and back panel in a specified order to form an intermediate product of a multi-layer board. In this embodiment, during the stacking process, such as during the stacking process, or after the stacking process is completed, any static elimination protection device 6 in the first embodiment is connected to the terminals at both ends of the battery string, so that the wiring The accumulated charge at the terminal is released to prevent electrostatic breakdown of the diode connected to the terminal during the process.

Step 103: The two connection terminals of the operating battery string are electrically connected to the two poles of the diode.

Wherein, the diode may be a diode in an external component or device, such as a diode in a junction box.

When the above step 102 and step 103 are executed, according to the specific location of the static elimination protection device, the order of the two steps may not be limited. Even in some examples, as shown in FIG. 9 , step 102 and step 103 can be realized in one operation process, that is, the effects of these two steps can be realized through step 1022 at the same time.

Step 104: laminating the front panel, the first adhesive film, the cell strings, the second adhesive film and the back sheet to form a solar photovoltaic module.

In one example, as shown in FIG. 8, the above-mentioned static elimination protection device may include the above-mentioned relay 61, and the relay 61 is a miniature relay whose length, width, and height are all less than 10 mm. Correspondingly, step 102 may specifically include:

Step 1021: After the front panel, the first adhesive film, and the battery string are stacked in sequence, the operation relay is placed between the two terminals of the battery string, and the two ends of the operation relay are respectively fixedly connected to the two terminals; The second adhesive film and the back plate are sequentially covered on the battery string.

Specifically, a laminated relay process is added to the lamination process, and the corresponding lamination process is: the front panel, the first adhesive film, the relay, the battery string, the second adhesive film and the back plate, or the front panel, the first adhesive film , battery string, relay, second film and backplane. By inserting the process link of installing the relay in the lamination process of solar photovoltaic modules, it is possible to realize the connection between the static elimination protection device and the two terminals on the battery string without adding additional links to the overall process process. The miniature relay whose length, width and height are all less than 10 mm has almost no influence on the laminated manufacturing of solar photovoltaic modules, and does not change the overall structural size of the modules, which facilitates the layout.

In one example, as shown in FIG. 9, the above-mentioned static electricity protection device may include the above-mentioned relay 61, the relay 61 is a miniature relay with a length, width, and height of less than 20mm, and is built in a junction box for accommodating diodes, and The two ends of the relay 61 are respectively connected to the two pins of the diodes used to connect the two terminals in the junction box through pads; correspondingly, step 102 may specifically include:

Step 1022: Laminate in sequence the front panel, the first adhesive film, the battery string, the second adhesive film and the back panel, place the junction box on the back panel after stacking, and operate the battery strings drawn from the back panel The two terminals of the diode are inserted into the junction box and connected to the two pins of the diode respectively.

Specifically, after the backplane process in the stacking process is completed, the two connection terminals of the battery strings are drawn out from the backplane, and the two connection terminals of the battery strings drawn out from the backplane are inserted into the junction box, and connected with the The two pins of the diode are connected. The corresponding lamination process is: front panel, first adhesive film, battery string, second adhesive film, back panel and relay. By inserting the process link of installing the relay after the backplane process of the stacking process of solar photovoltaic modules, it can be realized that after the existing stacking process is completed, an additional link can be used to realize the connection between the static elimination protection device and the two terminals on the battery string Connection without changing the existing stacking process, avoiding change costs, and more convenient operation.

In this step, the above step 102 and step 103 are implemented synchronously, so after this step, the content of step 104 can be continued.

In one example, as shown in FIG. 10 , the above-mentioned static elimination protection device may include the above-mentioned short-circuit structure 62; the short-circuit structure 62 includes a conductive layer and an insulating layer that are arranged to fit each other; correspondingly, step 102 may specifically include:

Step 1023: stack the front panel, the first adhesive film, the battery string, the second adhesive film, and the back panel in sequence. After the stacking, the operating short-circuit structure is tightly socketed on the secondary panel through the socket provided on it. The terminal is led out from the backplane, and the terminal is bent towards the backplane so that the terminal is in contact with the conductive layer of the short-circuit structure. The insulating layer is located between the backplane and the conductive layer to prevent the conductive layer from contacting the backplane .

Specifically, after the backplane process in the stacking process is completed, the two connection terminals of the battery string are drawn out from the backplane, and at the same time, the short-circuit structure is arranged on the backplane to contact the above two connection terminals drawn out from the backplane. connected. The corresponding lamination process is: the front panel, the first adhesive film, the battery string, the second adhesive film, the back sheet and the short-circuit structure. By inserting the process link of installing the short-circuit structure after the backsheet process of the stacking process of solar photovoltaic modules, it can be realized that after the existing stacking process is completed, an additional link can be used to realize the two Terminal connection, no change to the existing lamination process, avoiding change costs, and more convenient operation.

On this basis, in step 104, before laminating the front panel, the first adhesive film, the battery string, the second adhesive film and the back sheet, it also includes:

Step 1051: Take off the short-circuit structure.

In the subsequent process, the shorting structure needs to be taken out before the EL test before lamination, and put back into the shorting structure after the test is completed; and the shorting structure is taken out before the subsequent assembly process of the junction box.

In one example, as shown in FIG. 11, the static elimination protection device 6 includes a conductive sheet 63 and a grounding cable 64; correspondingly, as shown in FIG. 12, the above step 102 may specifically include:

Step 1024: sequentially stack the front panel, the first adhesive film, the battery string, the second adhesive film, and the back panel. During the stacking process, the operating conductive sheet is arranged between the first adhesive film and the battery string, Or it is arranged between the second adhesive film and the battery string, and the conductive sheet is covered on the terminal; the conductive sheet is operated to connect with the grounding cable.

Wherein, the conductive sheet 63 is arranged between the first adhesive film 2 and the battery string, or is arranged between the second adhesive film 4 and the battery string, and the connecting terminals (such as terminals a and b) are in contact with the surface of the conductive sheet 63 , one end of the grounding cable 64 is connected to the conductive sheet 63, and the other end is grounded. Through the conductive sheet 63, the accumulated charge at the connection terminal can be led to the ground through the grounding cable 64, so as to release this part of the charge. Among them, the conductive sheet 63 can be composed of metal sheets or other conductive materials; its thickness is 0-5000 microns, and the thickness is selected on the premise that it does not affect the lamination tolerance; the length and width need to ensure that only all the charge output positions (a-f) are covered. , cannot cover the surface of the battery sheet 31.

Specifically, the process of laminating conductive sheets and grounding cables is added to the lamination process. The corresponding lamination process is: front panel, first adhesive film, conductive sheet and grounding cable, battery string, second adhesive film and back plate , or the front panel, the first adhesive film, the battery string, the conductive sheet and the grounding cable, the second adhesive film and the back plate. By inserting the process link of installing the conductive sheet and the grounding cable into the lamination process of the solar photovoltaic module, it is possible to realize the connection between the static elimination protection device and the two terminals on the battery string without adding additional links to the overall process process connect.

Further, as shown in Figure 11, there are multiple battery strings, and each battery string is connected in series through a bus bar; correspondingly, in step 1024, the process of making the conductive sheet cover the terminal may include: operating the conductive sheet to penetrate It is laid on the terminals of multiple battery strings. The bus bars are connected in series, and the conductive sheet 63 is laid through the connection terminals of multiple battery strings (for example, laid through the terminals a, b, c, d, and e, f). This arrangement can reduce the difficulty of the manufacturing process of the conductive sheet 63 .

On the basis of step 1024, before step 104, laminating the front panel, the first adhesive film, the battery string, the second adhesive film and the back sheet, it also includes:

Step: 1052: Take out the conductive sheet.

Specifically, when the conductive sheet 63 is used as the static elimination device, since the conductive sheet 63 is fixedly connected to both ends of the connection terminals, the diode connected between the two connection terminals cannot work normally during the connection period. Before carrying out the front EL test, it is necessary to remove the arrangement of the conductive sheet 63 . In this embodiment, the conductive sheet 63 has a certain degree of flexibility, and does not cause stress concentration or irreversible deformation to the battery sheet and the laminated structure during the stacking process and the taking-out process.

Compared with the prior art, the embodiment of the present invention provides a solar photovoltaic module as an intermediate product in the solar photovoltaic module manufacturing process, including a stacked front panel, a first adhesive film, a battery string, a second adhesive film and Backplane, and additional anti-static protection device. Among them, the two ends of the battery string are respectively provided with terminals for electrical connection with the two poles of the diode, and the anti-static protection device is respectively connected with these two terminals, so that the accumulation near the terminals caused by light and friction during the manufacturing process The charge is released to prevent diode breakdown.

The step division of the above various methods is only for the sake of clarity of description. During implementation, it can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent. ; Adding insignificant modifications or introducing insignificant designs to the algorithm or process, but not changing the core design of the algorithm and process are all within the scope of protection of this patent.

Those of ordinary skill in the art can understand that the above-mentioned embodiments are specific examples for realizing the present invention, and in practical applications, various changes can be made to it in form and details without departing from the spirit and spirit of the present invention. scope.

Claims (11)

1. A solar photovoltaic module, comprising: the battery pack comprises a front panel, a first adhesive film, a battery string, a second adhesive film, a back panel and a charge removing protection device, wherein the front panel, the first adhesive film, the battery string, the second adhesive film and the back panel are arranged in a laminated manner;

and the two ends of the battery string are respectively provided with a connecting terminal used for being electrically connected with the two poles of the diode, and the electricity removal protection device is respectively connected with the two connecting terminals and used for releasing accumulated charges at the connecting terminals.

2. The solar photovoltaic module of claim 1, wherein the neutralization protection device comprises a relay;

the relay is used for monitoring the voltage between the two wiring terminals and controlling the two wiring terminals to be in short circuit when the voltage is greater than a preset voltage; the relay is a miniature relay with the length, width and height of less than 20 mm.

3. The solar photovoltaic module of claim 2, wherein the relay is disposed between the first adhesive film and the second adhesive film and positioned between two terminals of the battery string, and two ends of the relay are respectively and fixedly connected to the two terminals; or the relay is built in a junction box for accommodating the diode, and the relay is connected with a diode pin for connecting the wiring terminal in the junction box.

4. The solar photovoltaic module of claim 1, wherein the neutralization protection device comprises a shorting structure;

the short circuit structure is arranged on the two wiring terminals and used for short-circuiting the two wiring terminals.

5. The solar photovoltaic module of claim 4, wherein the shorting structure comprises a conductive layer and an insulating layer disposed in a fitting manner;

the short circuit structure is tightly sleeved on the two wiring terminals led out from the back plate through the jacks arranged on the short circuit structure, the wiring terminals are in contact connection with the conducting layer of the short circuit structure after being bent, and the insulating layer is located between the back plate and the conducting layer and used for blocking the conducting layer from being in contact with the back plate.

6. A preparation method of a solar photovoltaic module is characterized by comprising the following steps:

providing a front panel, a first adhesive film, a battery string, a second adhesive film and a back panel;

sequentially laminating a front panel, a first adhesive film, a battery string, a second adhesive film and a back panel in sequence, installing a charge removal protective device in the laminating process or after laminating, and operating the charge removal protective device to be connected with connecting terminals at two ends of the battery string so as to release accumulated charges at the connecting terminals;

operating two connecting terminals of the battery string to be electrically connected with two poles of a diode;

and laminating the front panel, the first adhesive film, the battery string, the second adhesive film and the back panel to form the solar photovoltaic module.

7. The method of claim 6, wherein the de-electrifying protection device comprises a relay, wherein the relay is a micro-relay with the length, width and height of less than 20 mm; the installation in the lamination process removes electric protection device, and operates the protection device that removes electricity and be connected with the binding post at the both ends of battery cluster includes:

after the front panel, the first adhesive film and the battery string are sequentially laminated, operating the relay to be arranged between two wiring terminals of the battery string, and operating two ends of the relay to be respectively and fixedly connected with the two wiring terminals; and operating the second adhesive film and the back plate to sequentially cover the battery string.

8. The method according to claim 6, wherein the neutralization protection device comprises a relay built in a junction box for accommodating the diode, and both ends of the relay are connected with two pins of the diode in the junction box for respectively connecting two of the connection terminals through pads; the apparatus for mounting a charge removing protection device after lamination and operating the charge removing protection device to connect with terminals at both ends of the battery string comprises:

and after lamination, the junction box is arranged on the back plate, and two wiring terminals of the battery string led out from the back plate are inserted into the junction box and are respectively connected with two pins of the diode.

9. The method of claim 6, wherein the neutralization protection device comprises a shorting structure; the short-circuit structure comprises a conductive layer and an insulating layer which are mutually attached; the installation of charge removal protection device after the lamination, and the operation charge removal protection device is connected with the binding post at both ends of battery cluster, include:

after lamination, operating the short-circuit structure to be tightly sleeved on the wiring terminal led out from the back plate through a jack arranged on the short-circuit structure, and bending the wiring terminal towards the back plate to enable the wiring terminal to be in contact connection with the conducting layer of the short-circuit structure, wherein the insulating layer is positioned between the back plate and the conducting layer and used for preventing the conducting layer from being in contact with the back plate;

before laminating the front panel, the first adhesive film, the battery string, the second adhesive film and the back panel, further comprising: and taking down the short-circuit structure.

10. The method of claim 6, wherein the neutralization protection device comprises an electrically conductive sheet and a ground cable; the installation in the lamination process removes electric protection device, and operates the protection device that removes electricity and be connected with the binding post at the both ends of battery cluster includes:

in the lamination process, operating the conducting strip to be arranged between the first adhesive film and the battery string or between the second adhesive film and the battery string, and enabling the conducting strip to cover the connecting terminal; operating the conductive strip to connect with the ground cable;

before laminating the front panel, the first adhesive film, the battery string, the second adhesive film and the back panel, the method further comprises the following steps: and taking out the conductive sheet.

11. The method of claim 10, wherein there are a plurality of said battery strings, each of said battery strings being connected in series by a bus bar; make conducting strip cover in binding post includes: and operating the conducting strips to be laid on the wiring terminals of the plurality of battery strings in a penetrating manner.

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