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

Solar photovoltaic module and preparation method thereof Download PDF

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Publication number
CN115473489A
CN115473489A CN202110656049.2A CN202110656049A CN115473489A CN 115473489 A CN115473489 A CN 115473489A CN 202110656049 A CN202110656049 A CN 202110656049A CN 115473489 A CN115473489 A CN 115473489A
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CN
China
Prior art keywords
adhesive film
battery string
relay
protection device
terminals
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Pending
Application number
CN202110656049.2A
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Chinese (zh)
Inventor
李志伟
陈真
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Jinko Solar Co Ltd
Jinko Solar Co Ltd
Original Assignee
Zhejiang Jinko Solar Co Ltd
Jinko Solar Co Ltd
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Application filed by Zhejiang Jinko Solar Co Ltd, Jinko Solar Co Ltd filed Critical Zhejiang Jinko Solar Co Ltd
Priority to CN202110656049.2A priority Critical patent/CN115473489A/en
Publication of CN115473489A publication Critical patent/CN115473489A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F3/00—Carrying-off electrostatic charges
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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 embodiment of the invention relates to the technical field of solar cells, in particular to a solar photovoltaic module and a preparation method thereof.
Background
In the manufacturing process of the solar photovoltaic module, charges are formed in the module due to the friction between materials and a tool and a fixture and photovoltaic generated by illumination, and charge accumulation is formed on two sides of a PN junction of a diode of a junction box; when the charge accumulation amount reaches a certain value, electrostatic discharge breakdown (ESD) easily occurs, so that the diode fails, and the usability of the photovoltaic module is affected.
Disclosure of Invention
The embodiment of the invention aims to provide a solar photovoltaic module and a preparation method thereof, which can effectively reduce the charge accumulation at two sides of a diode of a junction box in the process of manufacturing the solar photovoltaic module and avoid breakdown failure of the diode.
In order to solve the above technical problem, an embodiment of the present invention provides a solar photovoltaic module, including: 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.
Compared with the prior art, the solar photovoltaic module provided by the embodiment of the invention is an intermediate product in the solar photovoltaic module manufacturing process, and comprises a front panel, a first adhesive film, a battery string, a second adhesive film, a back panel and an additionally arranged electricity removal 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. The two ends of the battery string are respectively provided with a connecting terminal used for being electrically connected with two poles of a diode, and the electricity removal protection device is respectively connected with the two connecting terminals, so that accumulated charges near the connecting terminals caused by illumination, friction and the like in the manufacturing process are released, and the effect of preventing the diode from breakdown is achieved.
In addition, the neutralization protection device includes 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 controls the two wiring terminals to be in short circuit under specified conditions, so that the charge release process on the wiring terminals can be controlled; the relay is a miniature relay with the length, width and height of less than 20 mm.
In addition, the relay is arranged between the first adhesive film and the second adhesive film and positioned between two wiring terminals of the battery string, and two ends of the relay are fixedly connected with the two wiring terminals respectively; 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. Through being fixed a position the relay between two binding post, perhaps set up in the terminal box, can realize the nimble setting of relay, can avoid the relay to contact with the battery piece on the battery cluster simultaneously to prevent to press the battery piece to cause the latent crack to scrap.
In addition, the charge removal protection device comprises a short-circuit structure; the short circuit structure is arranged on the two wiring terminals and is used for short-circuiting the two wiring terminals. The two wiring terminals are directly short-circuited by using the short-circuit structure for curing, and the short-circuit structure is simple and easy to realize.
In addition, the short-circuit structure comprises a conductive layer and an insulating layer which are attached to each other; 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. Realize two terminal shorts through the conducting layer, the insulating layer blocks the protection to the conducting layer to it is better to make the short circuit effect.
The embodiment of the invention provides a preparation method of a solar photovoltaic module, which comprises 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.
Compared with the prior art, in the manufacturing process of the solar photovoltaic module, in the process of laminating the front panel, the first adhesive film, the battery string, the second adhesive film and the back panel or after laminating, the arrangement of the electricity removal protection device is additionally arranged. The two ends of the battery string are respectively provided with a connecting terminal used for being electrically connected with two poles of a diode, and the electricity removal protection device is operated to be respectively connected with the two connecting terminals, so that accumulated charges near the connecting terminals caused by illumination, friction and the like in the manufacturing process are released, and the effect of preventing the diode from being broken down is achieved.
In addition, the electricity removal protection device comprises a relay, and the relay is a micro relay with the length, width and height of less than 10 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.
In addition, the electricity removal protection device comprises a relay which is arranged in a junction box for accommodating the diode, and two ends of the relay are respectively connected with two pins of the diode which is arranged in the junction box and used for respectively connecting two wiring terminals through bonding pads; 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: and after lamination, the junction box is arranged on the back plate, and two connecting 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.
In addition, the charge removal protection device comprises a short-circuit 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, the method further comprises the following steps: and taking down the short-circuit structure.
In addition, the neutralization protection device comprises a conductive sheet and a grounding 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 laminating process, operating the conducting plate 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 plate to cover the wiring terminal; operating 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, the method further comprises the following steps: and taking out the conductive sheet.
In addition, the battery strings are multiple and are connected in series through bus bars; 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.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings which correspond to and are not to be construed as limiting the embodiments, in which elements having the same reference numeral designations represent like elements throughout, and in which the drawings are not to be construed as limiting in scale unless otherwise specified.
Fig. 1 is a schematic view of a solar photovoltaic module according to a first embodiment;
fig. 2 is a schematic diagram of a battery string according to the first embodiment;
fig. 3 is a schematic diagram of a relay according to a first embodiment;
fig. 4a is a schematic diagram of a relay according to a first embodiment;
fig. 4b is a schematic diagram of a relay according to the 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;
fig. 7 is a flowchart of a method of manufacturing a solar photovoltaic module according to a second embodiment;
fig. 8 is a flowchart of a method of manufacturing a solar photovoltaic module according to a second embodiment;
fig. 9 is a flowchart of a method of manufacturing a solar photovoltaic module according to a second embodiment;
fig. 10 is a flowchart of a method of manufacturing a solar photovoltaic module according to a second embodiment;
fig. 11 is a schematic view of a conductive sheet and a ground 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 objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
A 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 fig. 1 and 2, the solar photovoltaic module includes: a front panel 1, a first adhesive film 2, a battery string (three groups of battery strings S1, S2 and S3 are shown in the figure as an example, in the present embodiment, the layer structure of the battery string is summarized as a battery string layer 3), a second adhesive film 4 and a back panel 5, and a charge removal protection device 6; the two ends of the battery string are respectively provided with a connection terminal (as shown in fig. 1, ends a and b of the battery string S1, ends c and d of the battery string S2, or ends e and f of the battery string S3) for electrically connecting with two poles of a diode, and the charge removal protection device 6 is respectively connected with the two connection terminals (as the charge removal protection device 6 is connected with the ends a and b of the battery string S1) for releasing accumulated charges at the connection terminals.
Compared with the prior art, the solar photovoltaic module provided by the embodiment of the invention is an intermediate product in the solar photovoltaic module manufacturing process, and comprises a front panel, a first adhesive film, a battery string, a second adhesive film, a back panel and an additionally arranged electricity removal 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 mode. The two ends of the battery string are respectively provided with a connecting terminal used for being electrically connected with two poles of a diode, and the electricity removal protection device is respectively connected with the two connecting terminals, so that accumulated charges near the connecting terminals caused by illumination, friction and the like in the manufacturing process can be released, and the effect of preventing the diode from being broken down is achieved.
The following description specifically describes implementation details of the solar photovoltaic module of the present embodiment, and the following description is provided only for the sake of understanding and is not necessary for implementing the present embodiment.
As shown in fig. 2, the cell string in the solar photovoltaic module of the present embodiment is formed by serially connecting the cell sheets 31 through the solder strips 32. Multiple groups of battery strings can be arranged in one solar photovoltaic assembly, the multiple groups of battery strings can be connected in series through bus bars, for example, the bus bar bc can realize the series connection of the battery string S1 and the battery string S2, and the bus bar de can realize the series connection of the battery string S2 and the battery string S3. In the manufacturing process, on the basis of the structure that the front panel 1, the first adhesive film 2, the battery string, the second adhesive film 4 and the back panel 5 are arranged in a laminated manner, the electricity removal protection device 6 is additionally arranged in the embodiment. The static elimination protection device 6 is used for being connected with the terminals of the battery string, such as the ends a and b of the battery string S1 shown in fig. 1, respectively, so as to release the accumulated charges at the ends a and b, and thus to protect the diodes connected to the ends a and b from electrostatic breakdown. Of course, in practical application, two static elimination protective devices 6 may be added, one of which is connected to the terminals c and d of S2, respectively, to release the accumulated charges at the terminals c and d, so as to protect the diodes connected to the terminals c and d from electrostatic breakdown; and the other is respectively connected with terminals e and f of the S3 to release the accumulated charges at the terminals e and f and carry out anti-electrostatic breakdown protection on the diodes connected to the terminals e and f.
In the present embodiment, the structure of the neutralization protection device 6 and the neutralization principle are not limited, and any configuration having the same technical effect as the neutralization protection device 6 of the present embodiment falls within the scope protected by the neutralization protection device 6 of the present embodiment. Several implementations of the neutralization protection device 6 provided by the present invention will be specifically described below.
In one example, as shown in fig. 3, the electricity removal protection device 6 includes a relay 61, and the relay 61 is configured to monitor a voltage between the two terminals (e.g., terminals a and b), and control the two terminals to be shorted when the voltage is greater than a preset voltage; the relay is a miniature relay with the length, width and height less than 20 mm.
Specifically, the relay 61 may be an electromagnetic relay, and the electromagnetic relay generally includes 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 two terminals, and the relay 61 is provided with a preset voltage. When the voltage (voltage between a and b) at the two ends of the diode is greater than the preset voltage (voltage value of the withstand voltage test of the solar photovoltaic module, such as system voltage + 2+ 1000v), the relay 61 acts, the switch K is turned off, and the diode is in a short-circuit state, so that the diode breakdown caused by the fact that a large current flows through the diode is effectively prevented. When the voltage (voltage between a and b) at the two ends of the diode is smaller than the preset voltage (voltage value of the insulation withstand voltage test of the solar photovoltaic module, such as system voltage + 2+ 1000v), the switch K is turned on, so that the diode is in a normal working state.
In one example, as shown in fig. 4a, the relay 61 is disposed between the first adhesive film 2 and the second adhesive film 4 (not shown), and is positioned between two terminals of the battery string, and two ends of the relay 61 are respectively fixedly connected to the two terminals (e.g., ends a and b); alternatively, in another example, as shown in fig. 4b, the relay 61 is built in the terminal block 7 for accommodating the diode, and the relay 61 is connected to a diode pin in the terminal block for connecting the above-mentioned connection terminal.
Specifically, when the relay 61 is disposed, the relay 61 may be directly connected to the connection terminal on the battery string, so that when the relay 61 is disposed, the relay 61 may be disposed as a micro relay and disposed close to the battery string, that is, disposed between the first adhesive film 2 and the battery string, or disposed between the second adhesive film 4 and the battery string, and positioned between two connection terminals of the battery string, so as to form an integral body with the lamination structure formed by the lamination process. The relay 61 is designed into a miniature relay with small volume, so that the influence of the miniature relay on the lamination manufacturing of the solar photovoltaic module can be reduced, the influence on the overall structure size is small, and the layout is convenient. Still alternatively, as shown in fig. 4b, the relay 61 is connected to a diode for connection to a terminal on the battery string, thereby indirectly achieving connection of the relay 61 to the terminal on the battery string, and therefore, when the position of the relay 61 is arranged, it may be arranged in a component or device including the above-described diode, such as the junction box 7 including the above-described diode. The junction box 7 is provided with two bonding pads 71 respectively used for connecting two pins of the diode, two ends of the relay 61 are also respectively connected with the two bonding pads 71, and the bonding pads 71 are provided with connecting holes 72 for the connection terminals on the battery string to pass through and be welded with the bonding pads 71. The pad 71 is electrically connected to an external device through an electric wiring 73. After the connection terminal passes through the connection hole 72 and is welded to the pad 71, the diode of the terminal box 7 is connected to the connection terminal of the battery string, and the relay 61 is connected to the connection terminal of the battery string.
When the relay 61 is used as a charge eliminator, the relay 61 can control whether the two wiring terminals are in short circuit or not according to the voltages at the two ends of the wiring terminals, so that the normal work of the diode is not influenced, and the setting of the relay 61 can still be reserved in the final solar photovoltaic module formed after the process is finished without being removed.
In one example, as shown in fig. 5, the neutralization protection device 6 includes a shorting structure 62; shorting structures 62 are provided on both terminals (e.g., terminals a, b) for shorting the terminals. The short circuit structure 62 is similar to the relay 61 in arrangement position, and can be arranged inside the laminated structure, or outside the laminated structure, such as on the back plate 5 (as shown in fig. 6), and is located on two connection terminals leading out of the back plate 5 from the battery string, so as to realize short circuit of the two connection terminals.
Further, the shorting structure 62 includes a conductive layer and an insulating layer (not shown) disposed adjacent to each other; the conducting layer is in contact connection with the two wiring terminals, and the insulating layer is used for preventing the conducting layer from being in contact with the residual structures except the wiring terminals in the solar photovoltaic module. For example, in fig. 6, the shorting structure 62 is tightly sleeved on two terminals (e.g., a and b) led out from the backplane 5 through the insertion holes provided thereon, the terminals a and b are bent and then connected in contact with the conductive layer of the shorting structure 62, and meanwhile, the insulating layer is located between the backplane 5 and the conductive layer to block the conductive layer from contacting the backplane 5. The side (shown in the figure) of the short circuit structure 62 opposite to the back plate 5 is a conductive layer in contact connection with the connection terminals a and b, and the conductive layer is in contact with the bent connection terminals so as to be connected with the connection terminals a and b; the short circuit structure 62 is above-mentioned insulating layer towards 5 one sides of backplate, keeps apart conducting layer and backplate 5 through this insulating layer to reach better nipple joint effect.
When using short circuit structure 62 as the neutralization apparatus, because short circuit structure 62 is fixed connection with binding post both ends, the unable normal work of diode of connecting between two binding post during the connection, consequently need demolish the setting of short circuit structure 62 in the final solar PV modules that form after the process.
Compared with the prior art, the solar photovoltaic module provided by the embodiment is an intermediate product in the solar photovoltaic module manufacturing process, and comprises a front panel, a first adhesive film, a battery string, a second adhesive film, a back panel and an additionally-arranged electricity removal 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. The two ends of the battery string are respectively provided with a connecting terminal used for being electrically connected with two poles of a diode, and the electricity removal protection device is respectively connected with the two connecting terminals, so that accumulated charges near the connecting terminals caused by illumination, friction and the like in the manufacturing process are released, and the effect of preventing the diode from breakdown is achieved.
The second embodiment of the invention relates to a method for manufacturing a solar photovoltaic module. The method is used for preparing the solar photovoltaic module according to any one of the first embodiment, and as shown in fig. 7, the method comprises the following steps:
step 101: providing a front panel, a first adhesive film, a battery string, a second adhesive film and a back panel;
the front panel may be made of glass, and the first adhesive film and the second adhesive film may be Ethylene Vinyl Acetate (EVA), which is also called EVA film.
Step 102: the front panel, the first adhesive film, the battery string, the second adhesive film and the back panel are sequentially laminated, the electricity removal protection device is installed in the laminating process or after lamination, and the electricity removal protection device is operated to be connected with the wiring terminals at two ends of the battery string so as to release accumulated charges at the wiring terminals.
The conventional solar photovoltaic module process mainly comprises the following steps: the manufacturing process comprises the following steps of battery piece sorting, welding, laminating, electroluminescence (EL) testing before laminating, EL testing after laminating, framing, wire box mounting, curing, cleaning, final I-V testing, packaging and the like. In this embodiment, there is an improvement mainly for the lamination process, so detailed descriptions of other processes are not provided. The lamination process is mainly to superpose the prepared front panel, the first adhesive film, the battery string, the second adhesive film and the back panel in a specified order to form a multi-layer intermediate product. In this embodiment, in the lamination process, for example, during the lamination process or after the lamination process is completed, any of the neutralization protection devices 6 in the first embodiment is connected to the connection terminals at both ends of the battery string, so as to release the accumulated charges at the connection terminals and prevent the diodes connected to the connection terminals from electrostatic breakdown during the manufacturing process.
Step 103: two terminals of the battery string are electrically connected to both poles of the diode.
The diode may be an external component or a diode in a device, such as a diode in a junction box.
The sequence of the steps 102 and 103 may not be limited according to the specific position of the charge removal protection device when the steps are executed. Even in some examples, such as the example shown in fig. 9, the implementation of step 102 and step 103 may be implemented in one operation process, i.e., the effects of the two steps may be implemented simultaneously through step 1022.
Step 104: 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.
In one example, as shown in fig. 8, the neutralization protection device may include the relay 61, and the relay 61 is a micro-relay with a length, a width and a height of less than 10mm, and accordingly, step 102 may specifically include:
step 1021: after the front panel, the first adhesive film and the battery string are sequentially laminated, the operation relay is arranged between the two wiring terminals of the battery string, and two ends of the operation relay are respectively fixedly connected with the two wiring terminals; and operating the second adhesive film and the back plate to sequentially cover the battery string.
Specifically, a lamination relay process is added in the lamination process, and the corresponding lamination process comprises the following steps: the battery pack comprises a front panel, a first adhesive film, a relay, a battery string, a second adhesive film and a back panel, or the front panel, the first adhesive film, the battery string, the relay, the second adhesive film and the back panel. The procedure link of installing the relay is inserted into the lamination procedure of the solar photovoltaic module, so that the electricity removal protection device can be connected with the two wiring terminals on the battery string without additionally increasing the whole procedure. The miniature relay with the length, width and height smaller than 10mm hardly influences the lamination manufacturing of the solar photovoltaic module, the overall construction size of the module cannot be changed, and the layout is facilitated.
In one example, as shown in fig. 9, the static elimination protection device may include the relay 61, the relay 61 is a micro relay having a length, a width and a height smaller than 20mm and is embedded in a junction box for accommodating a diode, and two ends of the relay 61 are connected to two pins of the diode in the junction box for respectively connecting two terminals through pads; correspondingly, step 102 may specifically include:
step 1022: and sequentially laminating the front panel, the first adhesive film, the battery string, the second adhesive film and the back panel, placing the junction box on the back panel after laminating, and inserting two wiring terminals of the battery string led out from the back panel into the junction box and respectively connecting the two wiring terminals with two pins of the diode.
Specifically, after the backplane process in the lamination process is completed, two connection terminals of the battery string are led out from the backplane, and the two connection terminals of the battery string led out from the backplane are operated to be inserted into the connection boxes and connected with two pins of the diode respectively. The corresponding lamination process comprises the following steps: the battery pack comprises a front panel, a first adhesive film, a battery string, a second adhesive film, a back panel and a relay. After the procedure link of installing the relay is inserted into the back plate procedure of the lamination procedure of the solar photovoltaic module, the additional procedure is utilized to realize that the electricity removal protection device is connected with the two wiring terminals on the battery string after the existing lamination procedure is finished, the existing lamination procedure is not changed, the change cost is avoided, and the operation is more convenient.
In this step, the above steps 102 and 103 are synchronously implemented, so that after this step, the content of step 104 can be continuously executed.
In one example, as shown in fig. 10, the neutralization protection device may include the shorting structure 62; the short circuit structure 62 includes a conductive layer and an insulating layer which are attached to each other; correspondingly, step 102 may specifically include:
step 1023: the front panel, the first adhesive film, the battery string, the second adhesive film and the back plate are sequentially laminated, after lamination, the operation short-circuit structure is tightly sleeved on the wiring terminal led out from the back plate through the insertion hole formed in the operation short-circuit structure, the wiring terminal is bent towards the back plate, the wiring terminal is in contact connection with the conducting layer of the short-circuit structure, and the insulating layer is located between the back plate and the conducting layer and used for blocking the conducting layer from contacting with the back plate.
Specifically, after the backplane process in the lamination process is completed, two connection terminals of the battery string are led out from the backplane, and meanwhile, the short-circuit structure is arranged on the backplane and is in contact connection with the two connection terminals led out from the backplane. The corresponding lamination procedure is as follows: the battery pack comprises a front panel, a first adhesive film, a battery string, a second adhesive film, a back panel and a short circuit structure. After the process link of installing the short circuit structure is inserted into the back plate process of the lamination process of the solar photovoltaic module, the additional link is utilized to realize that the electricity removal protection device is connected with the two wiring terminals on the battery string after the existing lamination process is finished, the existing lamination process is not changed, the change cost is avoided, and the operation is more convenient.
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 panel, the method further includes:
step 1051: and taking down the short-circuit structure.
In the subsequent process, the short-circuit structure is required to be taken out before the EL test before lamination, and the short-circuit structure is put back after the test is finished; and taking out the short-circuit structure before the subsequent wire connecting box assembling process.
In one example, as shown in fig. 11, the neutralization protection device 6 includes a conductive sheet 63 and a ground cable 64; correspondingly, as shown in fig. 12, the step 102 may specifically include:
step 1024: sequentially laminating the front panel, the first adhesive film, the battery string, the second adhesive film and the back panel in sequence, wherein in the laminating process, the operating conducting sheet is arranged between the first adhesive film and the battery string or between the second adhesive film and the battery string, and the conducting sheet is covered on the connecting terminal; the operation conductive sheet is connected with a grounding cable.
The conducting strip 63 is disposed between the first adhesive film 2 and the battery string, or between the second adhesive film 4 and the battery string, and the connecting terminals (such as the ends a and b) are in contact with the surface of the conducting strip 63, and one end of the grounding cable 64 is connected to the conducting strip 63, and the other end is grounded. The accumulated charge at the connection terminal can be directed to ground through the grounding cable 64 by the conductive sheet 63, thereby discharging this portion of the charge. The conductive sheet 63 may be made of a metal sheet or other conductive material; the thickness is 0-5000 microns, and the thickness is selected on the premise that the lamination tolerance is not influenced; the length and width are required to cover only all the charge output positions (a-f) and not to cover the surface of the battery piece 31.
Specifically, a step of laminating a conductive sheet and a grounding cable is added in the laminating step, and the corresponding laminating step is as follows: the battery pack comprises a front panel, a first adhesive film, a conducting strip, a grounding cable, a battery string, a second adhesive film and a back panel, or the front panel, the first adhesive film, the battery string, the conducting strip, the grounding cable, the second adhesive film and the back panel. The process links of installing the conducting strips and the grounding cables are inserted into the lamination process of the solar photovoltaic module, so that the electricity removal protection device can be connected with the two wiring terminals on the battery string without additionally increasing the whole process procedure.
Further, as shown in fig. 11, the battery string is plural, and the battery strings are connected in series by the bus bar; accordingly, in step 1024, the process of covering the conductive sheet on the connection terminal may include: the operation conducting plate is laid on the wiring terminals of the battery strings in a penetrating way. The conductive sheets 63 are connected in series by bus bars, and are penetratingly laid on connection terminals (for example, penetratingly laid on terminals a, b, c, d, e, and f) of the plurality of battery strings. This arrangement can reduce the difficulty of the process of the conductive sheet 63.
On the basis of step 1024, before laminating the front panel, the first adhesive film, the battery string, the second adhesive film and the back panel, step 104, the method further includes:
the method comprises the following steps: 1052: and taking out the conductive sheet.
Specifically, when the conductive sheet 63 is used as a static eliminator, since the conductive sheet 63 is fixedly connected to both ends of the connection terminal, the diode connected between the two connection terminals cannot normally operate during the connection, and therefore, the conductive sheet 63 needs to be removed before the EL test is performed after the lamination process is completed. In this embodiment, the conductive sheet 63 has flexibility, and does not cause stress concentration or irreversible deformation to the battery sheet or the stacked structure in the stacking step or the removing step.
Compared with the prior art, the solar photovoltaic module provided by the embodiment of the invention is an intermediate product in the solar photovoltaic module manufacturing process, and comprises a front panel, a first adhesive film, a battery string, a second adhesive film, a back panel and an additionally arranged electricity removal 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. The two ends of the battery string are respectively provided with a connecting terminal used for being electrically connected with two poles of a diode, and the electricity removal protection device is respectively connected with the two connecting terminals, so that accumulated charges near the connecting terminals caused by illumination, friction and the like in the manufacturing process are released, and the effect of preventing the diode from breakdown is achieved.
The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.

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.
CN202110656049.2A 2021-06-11 2021-06-11 Solar photovoltaic module and preparation method thereof Pending CN115473489A (en)

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CN202110656049.2A CN115473489A (en) 2021-06-11 2021-06-11 Solar photovoltaic module and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110656049.2A CN115473489A (en) 2021-06-11 2021-06-11 Solar photovoltaic module and preparation method thereof

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CN115473489A true CN115473489A (en) 2022-12-13

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