CN210110813U - Water-blocking front plate integrated with solar battery interconnection - Google Patents

Abstract

The utility model discloses a front bezel that blocks water of integrated solar cell interconnection, include: the solar cell module comprises a substrate, a plurality of groups of series circuits and a plurality of solar cells, wherein the plurality of groups of series circuits are arranged on the substrate and are used for realizing interconnection of a plurality of solar sub cells; wherein each of the series circuits is configured to include: a plurality of current-guiding sub-grid lines which are used for collecting photo-generated current and are in a connected state; the bus bars of the main grid lines are used for collecting the photo-generated current collected by each current-guiding sub grid line; and the serial connection points are arranged at the leading-out ends of the main grid line bus bars. The utility model provides an interconnected front bezel that blocks water of integrated solar cell, it can be at the high printing opacity, the high multilayer composite substrate that blocks water integrated sub-battery current drainage, converge, the concatenation circuit of usefulness of sub-battery concatenates, can effectively avoid the encapsulation to close the wire displacement that concatenates that the piece in-process produced, solder joint desolder, battery piece displacement, the defect of the encapsulation layer dislocation that blocks water improve encapsulation effect and battery pack efficiency, yield.

Description

Water-blocking front plate integrated with solar battery interconnection

Technical Field

The utility model belongs to the technical field of integrated photovoltaic subcell concatenates and encapsulation. More specifically, the utility model relates to a high printing opacity of integrated sub-battery interconnection seals front bezel that blocks water.

Background

In commercial production, the anodes and the cathodes of front and rear sub-cells are connected in series by welding wires and conduction bands of current conduction and convergence in a manner of interconnecting external integrated sub-cells so as to obtain large output voltage meeting customer requirements.

In the prior art, the metal grid lines connecting the positive and negative electrodes of the battery in series are mostly combined with the positive and negative electrodes of the battery by means of high-temperature welding, conductive adhesive bonding and the like. After the series connection of the battery strings is completed, in order to ensure that the battery chips are not influenced by the external environment, sealing and water-blocking adhesive films are required to be laid on the front and the back of the battery strings, and the battery chips are sealed inside to ensure the service life of the battery chips.

However, the traditional serial connection and packaging mode involves a plurality of processes, and serial connection of the wires and the upper and lower packaging adhesive films easily cause displacement, desoldering of welding points, displacement of battery pieces, dislocation of water-blocking packaging layers and other defects in the multi-process circulation.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages which will be described later.

The utility model discloses it is high printing opacity, the multilayer composite substrate that highly blocks water, it can be at the integrated sub-battery current drainage of high printing opacity, the multilayer composite substrate that highly blocks water, converge, the concatenation circuit of the usefulness is concatenated to the sub-battery, can effectively avoid the encapsulation to close the wire displacement that concatenates that the piece in-process produced, the solder joint desolders, the battery piece displacement, the defect of the encapsulation layer dislocation that blocks water, the technology degree of difficulty and the equipment that the sub-battery concatenated the interconnection have been reduced, the process cost, improve encapsulation effect and battery pack efficiency, the yield.

To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a water blocking front plate for integrating solar cell interconnection, including:

the solar cell module comprises a substrate, a plurality of groups of series circuits and a plurality of solar cells, wherein the plurality of groups of series circuits are arranged on the substrate and are used for realizing interconnection of a plurality of solar sub cells;

wherein each of the series circuits is configured to include:

a plurality of current-guiding sub-grid lines which are used for collecting the photo-generated current generated on the surface of the cathode of the corresponding sub-battery and are in a communicated state;

the bus bars of the main grid lines are used for collecting the photo-generated current collected by each current-guiding sub grid line;

the leading-out ends of the main grid line bus bars are arranged to be connected with the positive electrode of the next sub-battery in series, and therefore the adjacent sub-batteries are connected in series and interconnected to form a series connection point of the flexible sub-battery array.

It is preferred that, among others,

the substrate is configured from bottom to top in sequence to include:

a flexible or rigid substrate with good weather resistance, corrosion resistance, antifouling property and mechanical property;

a pressure sensitive adhesive layer disposed on the substrate;

the poly terephthalic acid plastic film is arranged on the pressure-sensitive adhesive layer;

wherein, one side of the polyterephthalic acid plastic film facing the pressure-sensitive adhesive layer is provided with a water-blocking antireflection optical film, and the other side is provided with a polyolefin thermoplastic elastic sealing adhesive layer.

Preferably, an insulation scribing line with a U-shaped or circular structure is arranged at the position of the outer edge of the welding point of each sub-cell;

wherein the insulating score line is configured to score from the front surface electrode to the back electrode of the cell, but not through the back electrode.

Preferably, the water-blocking front plate is further provided with a back sealing adhesive layer on the side with the flexible sub-battery array, and a back water-blocking film layer.

The utility model discloses at least, include following beneficial effect: one of them, the utility model discloses an effectively avoid the subcell to concatenate, the desolder that produces in the packaging process, drawbacks such as material displacement, provide a high printing opacity, high resistant water seal dress composite water-blocking front bezel, the circuit that the subcell concatenated is integrated on it, can realize the subcell to concatenate simultaneously when arranging flexible subcell on this water-blocking front bezel, positive close piece encapsulation, simplify flexible cell concatenate, the packaging technology, reduce the high equipment and the operating cost of traditional close piece encapsulation technology, improve the product yield, reduce flexible battery pack encapsulation cost, simultaneously in the tandem circuit, because subcell drainage, the cluster point on confluence grid line and the confluence grid line all prepares the circuit figure that has certain thickness on the water-blocking film, so can not appear the short circuit that produces because of the grid line displacement each other;

two, the utility model discloses a front bezel that blocks water is provided with the high printing opacity of resistant shock resistance and highly blocks water basement, multilayer and subtracts reflection optical film, the sealed glued membrane that blocks water for the battery concatenates the back, and accessible hot pressing technology will concatenate the back battery and fix, and the photovoltaic side has firmly sealed on the compound water film that blocks water, and follow-up welding diode, draw forth subassembly electrode, backplate and close piece lamination in-process battery piece can not the displacement, has guaranteed the structural stability in the later stage process.

Thirdly, the utility model discloses a composite packaging front bezel makes the subcell concatenate, preceding structural layer that blocks water closes piece lamination one and stands the completion, has simplified the step that the subcell concatenated, the subassembly encapsulation, has avoided the material to close the piece in multichannel process circulation, produces the displacement, causes the solder joint to drop, concatenate wire short circuit, encapsulating material staggered floor etc. has reduced equipment and operating cost, has improved encapsulation effect and battery pack efficiency, yield.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic diagram of a water-blocking front plate structure in an embodiment of the present invention;

fig. 2 is a schematic view of a high-transmittance water-blocking front plate integrated with a sub-battery interconnection circuit according to another embodiment of the present invention;

fig. 3 is a schematic view of the arrangement and serial connection of the water-blocking front plate and the sub-battery according to another embodiment of the present invention;

fig. 4 is a schematic view of a flexible sub-cell with a welded insulating U-shaped score line in another embodiment of the invention;

fig. 5 is a schematic cross-sectional view of a battery assembly after encapsulating a back water blocking film in another embodiment of the present invention;

fig. 6 is a schematic diagram of a tandem connection node of the first sub-battery and the second sub-battery according to the present invention.

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

Fig. 1, 2, 5 show the implementation form of a water-blocking front plate for integrating interconnection of solar cells according to the present invention, which includes:

the substrate is provided with a plurality of groups of series circuits 6 for realizing interconnection of a plurality of solar sub-batteries, the series circuits are arranged on the water-blocking front plate and can be changed into circuit patterns with certain thickness by adopting a screen printing or developing etching process, so that short circuit caused by displacement of grid lines can not occur in the later processing process, and the base material is provided with a plurality of groups of partitioned series circuits, so that the later stage can implement series connection of a plurality of sub-electric waves;

wherein each of the series circuits is configured to include:

a plurality of current-guiding sub-grid lines 7 which are used for collecting the photo-generated current generated on the surface of the cathode of the corresponding sub-battery and are in a communicated state, and are arranged into a plurality of sub-grid lines which are parallel to each other;

a plurality of main gate line bus bars 8 for collecting photo-generated current collected by each of the current-guiding sub-gate lines, which are arranged perpendicular to each of the sub-gate lines and have a width greater than that of each of the sub-gate lines;

the series welding spots are arranged at the leading-out ends of the main grid line bus bars and are connected with the positive electrode of the next sub-battery in series, adjacent sub-batteries are connected in series and interconnected to form a series connection point 9 of the flexible sub-battery array 16, the battery film layer of the bus point on the main grid line bus bar is removed by adopting a laser technology on the series connection point of the leading-out ends of the bus bars so as to leak the bottom electrode of the second sub-battery, and further, a welding point on the water-blocking front plate, which is connected with the upper electrode of the first sub-battery, is contacted with the leaked bottom electrode of the second sub-battery.

In another example, as shown in fig. 1, the substrate is configured to include, from bottom to top:

a flexible or rigid substrate 1 with good weather resistance, corrosion resistance, antifouling property and mechanical property, such as an ethylene-tetrafluoroethylene composite film;

a pressure-sensitive adhesive layer 2 disposed on the substrate;

arranged on the pressure-sensitive adhesive layer

A poly (terephthalic acid) plastic film 4 such as a PET film;

wherein, one side of the polyterephthalic acid plastic film facing the pressure-sensitive adhesive layer is provided with a water-blocking antireflection optical film 3 with silicon dioxide;

the opposite side is provided with polyolefin thermoplastic elastic sealing adhesive layer 5, and it is fixed after being used for heating to the battery after concatenating to guarantee the stability between the structure, adopt the substrate in this kind of scheme, it has higher performance, guarantees that the physical properties, the chemical properties of later stage product are more stable, and the substrate can become the encapsulation front bezel that has series circuit, sealed sticky material, resistant time complex film that blocks water simultaneously, and the performance is more excellent.

In another example, as shown in fig. 4, an insulation score line 13 with a U-shaped or circular structure is arranged at the outer edge of the welding point of each sub-cell, and the function of the insulation score line is to ensure that the welding point can be completely surrounded by the insulation score line through the structural design so as to achieve the blocking function;

the U-shaped insulation score lines are arranged around each welding point of each sub-battery adopting the scheme, so that the welding point is disconnected from the front electrode of the sub-battery, the welding point is isolated, and the short circuit of the front electrode and the back electrode of the sub-battery through the welding point due to the leakage of welding slag in the welding process is prevented.

In another example, as shown in fig. 5, the water-blocking front plate is further provided with a back sealing adhesive layer 14 and a back water-blocking film layer 15 on one side having the flexible sub-battery array, in this scheme, after the sub-batteries are connected in series, packaged and fixed by the composite water-blocking front plate, the back sealing adhesive layer is laid on the other side of the battery, then a back water-blocking film is laid on the upper portion of the back sealing adhesive layer, and the battery string can be sealed by vacuumizing and heating lamination to form the high-weatherability solar battery assembly meeting the voltage and power requirements of a client.

A water-blocking front plate processing method comprises the following steps:

s1, processing the serial circuit, namely preparing the serial circuit of the sub-battery by adopting a screen printing or developing etching process on one side of the base material with the thermoplastic elastic sealing adhesive layer;

s2, arranging the sub-batteries, arranging the base material with the face of the series circuit facing upwards, arranging the front electrodes of the first sub-battery and the second sub-battery downwards so that the first sub-battery and the second sub-battery respectively face the series circuit, connecting the first sub-battery and the second sub-battery with the series points on the corresponding series circuit respectively in a laser welding mode, and forming a flexible sub-battery array by serially connecting and interconnecting adjacent sub-batteries.

In another example, the following steps are further included before step S1:

s11, preparing a base material, namely, adopting a flexible or rigid base with weather resistance, corrosion resistance, fouling resistance and good mechanical property, and compounding a pressure-sensitive adhesive layer and a poly terephthalic acid plastic film on the base material in sequence, wherein one surface of the poly terephthalic acid plastic film, which faces the pressure-sensitive adhesive layer, is plated with a water-blocking antireflection optical film, the other surface of the poly terephthalic acid plastic film is provided with a polyolefin thermoplastic elastic sealing adhesive layer so as to obtain a high-light-transmission and high-temperature-resistant water-blocking board base material, one surface of the poly terephthalic acid plastic film is plated with a water-blocking antireflection optical film with silicon dioxide, the other surface of the poly terephthalic acid plastic film is provided with a polyolefin thermoplastic elastic sealing adhesive layer, and an interconnection circuit for series connection of sub-;

s12, secondary processing of the substrate, namely uniformly arranging the polyolefin thermoplastic sealing adhesive material on the side wall of one side of the substrate by adopting a film condensation and tape casting process to obtain a corresponding thermoplastic elastic sealing adhesive layer, and after the series connection of the sub-batteries is completed by arranging the thermoplastic elastic sealing adhesive layer by adopting the scheme, the lamination (front lamination packaging) of the front water-blocking structure layer can be completed by hot pressing one station, so that the series connection and packaging process of the flexible batteries are simplified, the high equipment and operation cost of the traditional lamination packaging process are reduced, the product yield is improved, and the packaging cost of the flexible battery assembly is reduced.

In another example, after step S2, the method further includes the following steps:

s21, adopting a hot press to bond the flexible sub-battery array and the water-blocking front plate into a whole, after realizing the serial connection of the positive and negative electrodes of the front and back sub-batteries, then adopting a hot pressing process to permanently bond the battery string attached to the water-blocking film and the water-blocking film into a whole, so that the front-face sheet-combining packaging can be completed by hot pressing in one station, the packaging process is simplified, meanwhile, the photovoltaic side of the hot-pressed battery sheet is firmly sealed on the composite water-blocking film under the action of the water-blocking film thermoplastic sealant, and the battery sheet cannot be displaced in the subsequent diode welding, assembly electrode leading-out and back-plate sheet-combining laminating processes;

and S22, laying a back sealing adhesive layer and a back water-blocking film layer on one side of the water-blocking front plate with the flexible sub-battery array, and further carrying out vacuumizing and heating lamination to seal the battery strings to obtain the solar battery assembly which is used for sealing the battery strings to form the high-weather-resistance solar battery assembly meeting the voltage and power requirements of customers.

In another example, in step S1, the method further includes disposing corresponding insulation scribe lines having U-shaped or circular structures on the outer edge of each sub-cell welding point;

the preparation method of the insulation scribing line is configured to comprise the following steps:

the welding point area of the sub-battery becomes an isolated island relative to other places of the sub-battery, and the short circuit between the bottom electrode and the front electrode of the sub-battery is avoided during welding.

In another example, in step S2, the method for welding the series connection point of the sub-battery and the corresponding series circuit is configured to include:

the battery film layer of the confluence point on the main grid line bus bar is removed by adopting a laser technology so as to leak the bottom electrode of the second sub-battery, and then a welding point on the water blocking front plate, which is connected with the upper electrode of the first sub-battery, is contacted with the leaked bottom electrode of the second sub-battery.

The above scheme is merely illustrative of a preferred embodiment, and is not intended to be limiting. When the utility model is implemented, the proper replacement and/or modification can be carried out according to the requirements of users.

Example (b):

the utility model discloses a high performance that flexibility or rigidity basement and pressure-sensitive adhesive that weather-resistant, corrosion-resistant, antifouling, mechanical properties are good blocks water anti-reflection optical film, the compound high temperature resistant plastics of high printing opacity such as terephthalic acid form blocks water the board for the substrate, adopt in its one side congeal membrane, processes such as curtain coating with the even preparation of thermoplastic seal adhesive material on the substrate, adopt screen printing or development etching technology preparation concatenation circuit again, form the encapsulation front bezel that has concatenation circuit, seal adhesive material, weather-resistant functional layer that blocks water. The method comprises the steps of contacting the light-facing side of the sub-batteries with a series circuit of a water-blocking front plate, arranging the sub-batteries at a specified position of a packaging front plate, removing a battery film layer at a confluence point at the series connection point of the series circuit by adopting technologies such as laser and the like, leaking a bottom electrode of the sub-battery, enabling a welding point on the water-blocking front plate, which is connected with an upper electrode of a previous sub-battery, to be contacted with the leaked bottom electrode of the battery and welded together by adopting technologies such as laser and the like, so as to realize the series connection of a positive electrode and a negative electrode of a front sub-battery and a rear sub-battery, then adopting a hot-pressing process to permanently bond the battery string attached to the water-blocking film and the water-blocking film into a whole, firmly sealing the photovoltaic side of the hot-pressed battery on the composite water-blocking film under the action of a water-blocking film thermoplastic sealant, and ensuring that the battery pieces cannot be displaced in the subsequent lamination process of welding, so that a short circuit due to the displacement of the gate lines does not occur therebetween. The requirements of the processing technology are explained in a specific way by combining the attached drawings:

FIG. 1 is a schematic view of a highly light-transmissive water-blocking front plane integrated with a subcell interconnect circuit; as shown in figure 1, a high-performance water-blocking film which is formed by compounding a weather-resistant, corrosion-resistant, antifouling, good-mechanical property and high-light-transmittance ethylene-tetrafluoroethylene composite film 1, a pressure-sensitive adhesive 2 and a polyethylene terephthalate plastic film 4 coated with a silicon dioxide water-blocking antireflection optical coating 3 is used as a base material, a polyolefin thermoplastic elastic sealing adhesive material is uniformly prepared on the base material by adopting the processes of film condensation, tape casting and the like on one side of the base material to obtain 5 thermoplastic elastic sealing adhesive layers 5, and then a sub-battery series circuit 6 is prepared by adopting the screen printing or developing etching process to form a water-blocking front plate to be packaged with a series circuit, the sealing adhesive material and the weather-resistant water-blocking composite.

Fig. 2 is a schematic diagram of a series circuit integrated on the surface of a water-blocking front plate, as shown in fig. 2, the series circuit is prepared on the upper surface of a composite high-transmittance water-blocking front plate 10, in the middle, a current-guiding sub-grid line 7 is responsible for collecting photo-generated current generated on the negative electrode surface of each sub-battery, a main grid line bus bar 8 collects the photo-generated current on the surface of each sub-battery collected by each sub-grid line 7, and then the sub-batteries are connected in series with the positive electrode of the next sub-battery through a series connection point 9 on.

FIG. 3 is a schematic diagram of the arrangement and series connection of the water-blocking front plate and the sub-cells. As shown in fig. 3, the water-blocking front board 10 faces upward with the serial circuit, the light-facing surfaces (front electrodes) of the first sub-battery 11 and the second sub-battery 12 face downward, and the serial circuit on the water-blocking front board is placed at the corresponding position of the water-blocking film as shown in fig. 2 in a face-to-face manner, and then the back electrode of each sub-battery welding point (not shown) is welded to the corresponding welding point 9 on the corresponding bus bar 8 of the first battery 11 on the water-blocking film by using a welding technique such as laser, thereby realizing the serial connection of the first sub-battery 11 and the second sub-battery 12. In addition, U-shaped insulation scribes are arranged around each welding point of the sub-battery, so that the welding point is disconnected with the front electrode of the sub-battery, and the welding point is isolated, thereby preventing the front electrode and the back electrode of the sub-battery from being short-circuited at the welding point.

Fig. 4 is a schematic diagram of the sub-battery with the welded insulating U-shaped scribe lines adopted in this example, as shown in fig. 4, the laser and other well-scribed insulating scribe lines 13 are arranged around the welding point of the sub-battery, the insulating scribe lines 13 are directly scribed from the front surface electrode to the back electrode of the sub-battery, and cannot scribe the back electrode, so that the welding area of the sub-battery becomes an isolated island relative to the other places of the sub-battery, and the front electrode and the back electrode of the sub-battery are ensured not to be directly short-circuited by the welding point.

Fig. 5 is a schematic cross-sectional view of a battery assembly after packaging a back water-blocking back plate, as shown in fig. 5, after series-connecting, packaging and fixing sub-batteries through a front composite water-blocking front plate, laying a back sealing adhesive layer 14 on the other side of the batteries, then laying a back water-blocking film 15 on the upper portion of the back sealing adhesive layer, and performing vacuum-pumping and heat lamination to seal the battery strings to form a high-weather-resistance solar battery assembly meeting the voltage and power requirements of customers.

Fig. 6 is a schematic diagram of a serial connection node of the first sub-battery and the second sub-battery, and as shown in fig. six, the insulation scribe line 13 on the second sub-battery is directly etched from the front surface electrode of the battery to the back electrode, and cannot scribe the back electrode, so that the welding point area of the second sub-battery becomes an island relative to the other areas of the second sub-battery, and the bottom electrode and the front electrode of the second sub-battery are prevented from being short-circuited during welding. Removing the battery film layer of the confluence point at the serial connection point of the serial connection circuit by adopting the technologies of laser and the like, leaking out the bottom electrode of the second sub-battery, enabling a welding point 9 for connecting the water-blocking front plate and the upper electrode of the first sub-battery to be in contact with the leaked bottom electrode of the battery, welding the two electrodes together by adopting the technologies of laser and the like, realizing the serial connection of the anode and the cathode of the front sub-battery and the cathode of the rear sub-battery, distinguishing the specific structure of the flexible sub-battery array in the figure 5 by adopting the labels of 16-24 in the figure 6 so as to distinguish the scribing positions of the insulation scribes on the sub-batteries, specifically distinguishing the substrate of the 16-first sub-battery, the back electrode of the 17-first sub-battery, the P-type layer of the 18-first sub-battery, the N-type layer of the 19-first sub-battery, the front electrode of the 20-first sub-battery, the substrate of, 23-a P-type layer of a second sub-battery, 24-an N-type layer of the second sub-battery, 25-a front electrode of the second sub-battery, 15-a battery back water-blocking film, 14-a battery back adhesive layer and 26-a battery front water-blocking composite film.

Has the advantages that:

one of them, the utility model discloses a with weather resistant, corrosion-resistant, antifouling, mechanical properties good, the compound substrate that blocks water of high printing opacity, subassembly seal adhesive film, sub-battery series circuit integrated to the encapsulation front bezel that blocks water, use this front bezel that blocks water can concatenate the battery, the adhesive layer with sub-battery cluster and compound multiple production technology such as laminating of blocking water film simplify to one process one and stand alright realization. The device and the method avoid displacement caused by the fact that materials are combined in multiple process flows to cause welding spots to fall off, lead short circuits are connected in series, packaging materials are staggered and the like, reduce equipment and operation cost, and improve packaging effect and battery pack efficiency and yield.

Secondly, traditional technology subcell concatenates, the battery cluster is accomplished with front and back adhesive layer and the waterproof board encapsulation laminating piece, lamination to multichannel process, and this utility model provides a novel front bezel that blocks water has subcell concatenation circuit integrated on the high resistant compound basement that waits that high printing opacity, high water blocking tape have the sealed adhesive layer of thermoplasticity, and the battery concatenates, the encapsulation of openly blocking water of battery have been accomplished to the one-stop formula, and what sealed adhesive layer adopted is thermoplastic material, so can satisfy follow-up backplate seal reheat pressure.

Thirdly, the utility model discloses a flexible resistant water blocking material of waiting can be selected to the basement of the encapsulation front bezel that blocks water, also can select rigid material such as glass, can satisfy the solar module encapsulation of flexible basement and rigid base.

Fourthly, the series circuit of the sub-battery integrated by the water blocking packaging front plate can be customized according to the size, the shape, the electrical property and the like of the sub-battery, and can meet the packaging requirements of various solar batteries;

fifthly, the utility model discloses an integrated one deck or multilayer in the middle of the encapsulation water-blocking film block water anti-reflection optical film, improved the light transmissivity and the water-blocking nature of this front bezel that blocks water.

The number of apparatuses and the scale of the process described here are intended to simplify the description of the present invention. Applications, modifications and variations of the water-blocking front sheet of the integrated solar cell interconnection of the present invention and its processing method will be apparent to those skilled in the art.

While embodiments of the invention have been disclosed above, it is not intended to be limited to the applications listed in the specification and the examples. It can be applicable to various and be fit for the utility model discloses a field completely. Additional modifications will readily occur to those skilled in the art. The invention is therefore not to be limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims (4)

1. The utility model provides an interconnected front bezel that blocks water of integrated solar cell which characterized in that includes:

the solar cell module comprises a substrate, a plurality of groups of series circuits and a plurality of solar cells, wherein the plurality of groups of series circuits are arranged on the substrate and are used for realizing interconnection of a plurality of solar sub cells;

wherein each of the series circuits is configured to include:

a plurality of current-guiding sub-grid lines which are used for collecting the photo-generated current generated on the surface of the cathode of the corresponding sub-battery and are in a communicated state;

the bus bars of the main grid lines are used for collecting the photo-generated current collected by each current-guiding sub grid line;

the leading-out ends of the main grid line bus bars are arranged to be connected with the positive electrode of the next sub-battery in series, and therefore the adjacent sub-batteries are connected in series and interconnected to form a series connection point of the flexible sub-battery array.

2. The integrated solar-cell-interconnected water-blocking front sheet of claim 1, wherein the substrate is configured, in order from bottom to top, to comprise:

a flexible or rigid substrate with good weather resistance, corrosion resistance, antifouling property and mechanical property;

a pressure sensitive adhesive layer disposed on the substrate;

the poly terephthalic acid plastic film is arranged on the pressure-sensitive adhesive layer;

wherein, one side of the polyterephthalic acid plastic film facing the pressure-sensitive adhesive layer is provided with a water-blocking antireflection optical film, and the other side is provided with a polyolefin thermoplastic elastic sealing adhesive layer.

3. The interconnected water-blocking front sheet of integrated solar cells of claim 1, wherein a U-shaped or circular configuration of insulating score lines is provided at the outer edge of the solder joint of each sub-cell;

wherein the insulating score line is configured to score from the front surface electrode to the back electrode of the cell, but not through the back electrode.

4. The interconnected water-blocking front sheet of integrated solar cells of claim 1, wherein the water-blocking front sheet further comprises a back sealing adhesive layer on the side having the flexible sub-cell array, and a back water-blocking film layer.

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