CN220796768U

CN220796768U - Photovoltaic cell string and photovoltaic module

Info

Publication number: CN220796768U
Application number: CN202322226632.7U
Authority: CN
Inventors: 朱亮; 卢嘉彬; 曹建伟; 傅林坚; 高红刚; 张剑光; 郭伟强; 袁彬
Original assignee: Zhejiang Jingsheng Mechanical and Electrical Co Ltd
Current assignee: Zhejiang Jingsheng Mechanical and Electrical Co Ltd
Priority date: 2023-08-17
Filing date: 2023-08-17
Publication date: 2024-04-16
Anticipated expiration: 2033-08-17

Abstract

The present application relates to the field of photovoltaic cells, in particular to a photovoltaic cell string comprising: the battery piece unit, battery piece unit has two at least, and every battery piece unit all includes: the battery piece body is provided with a first surface and a second surface; the first welding strips are welded on the first surface, and the first welding strips are attached to the first surface; the second welding strips are welded on the second surface, and the second welding strips are attached to the second surface; the connecting piece is used for connecting the battery piece units; the battery piece units are overlapped end to end along the direction of the first welding strip or the second welding strip to form an overlapped space, and the connecting piece is respectively welded with the first welding strip and the second welding strip which are positioned in the overlapped space. The technical problems of high cost and low power generation of the photovoltaic module are solved, and the technical effects of high cost and low power generation of the photovoltaic module are achieved.

Description

Photovoltaic cell string and photovoltaic module

Technical Field

The application relates to the field of photovoltaic cells, in particular to a photovoltaic cell string and a photovoltaic module.

Background

The basic unit of the photovoltaic module is a battery piece, and the single solar battery can not be directly used as a power supply, and a plurality of single batteries are connected in series and parallel and tightly packaged into the module. Photovoltaic modules are the most important part of photovoltaic power generation systems, and function to convert solar energy into electrical energy to drive a load to operate.

In the prior art, in order to improve the power generated by the battery piece, the mode of connecting the battery piece end to end through the conductive adhesive to form a stacked tile battery string is generally adopted, however, for a multi-grid battery, the cost of adopting the conductive adhesive to bond the battery piece is higher, and the power generated is not good.

Therefore, the technical problems of the prior art are: there is a need for a low cost, high power battery structure.

Disclosure of Invention

The photovoltaic cell string and the photovoltaic module solve the technical problems of high cost and low generation power of the photovoltaic module, and achieve the technical effects of high cost and low generation power of the photovoltaic module.

On one hand, the photovoltaic cell string provided by the application adopts the following technical scheme:

a string of photovoltaic cells comprising: the battery piece unit, the battery piece unit has two at least, every battery piece unit all includes: the battery piece body is provided with a first face and a second face; the first welding strips are welded on the first surface, and the first welding strips are attached to the first surface; the second welding strips are welded on the second surface, and the second welding strips are attached to the second surface; the connecting piece is used for connecting the battery piece units; the battery piece units are overlapped end to end along the direction of the first welding strip or the second welding strip to form an overlapped space, and the connecting piece is respectively welded with the first welding strip and the second welding strip which are positioned in the overlapped space.

Preferably, an extension region is formed by extending one end of the first welding strip beyond the first surface, and the extension region and an opposite region of another battery sheet unit form the stacking space, wherein the opposite region is a side of the battery sheet unit opposite to the extension region.

Preferably, in the stacking space, the first welding strip and the second welding strip are located on the same side of the connecting piece, and the first welding strip and the second welding strip are welded with the connecting piece.

Preferably, in the stacking space, the first welding strip and the second welding strip are located at opposite sides of the connecting piece, and the first welding strip and the second welding strip are welded with the connecting piece.

Preferably, an end of the first welding strip away from the extension area is flush with the edge of the battery piece body.

Preferably, two ends of the second welding strip are flush with the edges of the battery piece body.

Preferably, the cross section of the first welding strip and/or the second welding strip is triangular, circular, rectangular or trapezoidal.

Preferably, the first welding strips and the second welding strips are arranged in parallel, and the number of the first welding strips and the second welding strips in each battery piece unit is 50-500.

Preferably, the connecting member is a bus bar, and the bus bar is flat.

On the other hand, the photovoltaic module provided by the application adopts the following technical scheme: the photovoltaic module comprises the photovoltaic cell string.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the application provides a novel connection structure of battery piece, welds preceding battery piece unit and the welding strip of the battery piece unit of later one and connects in series through the busbar, has replaced tradition to connect the battery piece unit through conductive adhesive, has greatly reduced battery piece unit cost of connecting in series on the one hand, and on the other hand is connected for conductive adhesive, has also improved electricity generation and conductive power.

2. The first welding strip and the second welding strip of two battery piece units are connected to the connecting piece, and first welding strip and second welding strip can be arranged in homonymy or heteronymy of connecting piece, and this application provides multiple connected embodiment, adopts different welding means to different technologies, improves technology compatibility.

Drawings

FIG. 1 is a schematic diagram of a string of photovoltaic cells described herein;

fig. 2 is a schematic view of a first connection structure of the photovoltaic cell string described herein;

FIG. 3 is an enlarged view of A in FIG. 2;

FIG. 4 is a schematic illustration of a first connection explosion of a string of photovoltaic cells described herein;

fig. 5 is a schematic view of a second connection structure of the photovoltaic cell string described herein;

FIG. 6 is an enlarged view of B in FIG. 5;

FIG. 7 is an exploded schematic view of an embodiment of a second connection structure of a photovoltaic cell string as described herein;

FIG. 8 is an exploded schematic view of another embodiment of a second connection structure of a photovoltaic cell string as described herein;

reference numerals illustrate: 100. a battery cell unit; 110. a battery piece body; 111. a first face; 112. a second face; 120. a first solder strip; 130. a second solder strip; 140. an extension region; 150. an opposing region; 200. a connecting piece; 300. stacking space.

Detailed Description

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

The application provides a photovoltaic cell string, as shown in fig. 1, comprising a plurality of battery cells 100 and a connector 200, wherein the battery cells 100 are used as basic units of the photovoltaic cell string, and the plurality of battery cells 100 form the photovoltaic cell string; the connection member 200 is used for connection between the battery cell units 100; the battery cells 100 at least include two battery cells 100 stacked end to end and connected by a connector 200 to form a photovoltaic cell string.

As shown in fig. 1 and 2, the battery cell 100 is used as a basic unit of a photovoltaic cell string, and the photovoltaic cell string is configured by a plurality of battery cells 100. The battery piece units 100 are provided with a plurality of battery piece units, each battery piece unit 100 comprises a battery piece body 110, a first welding strip 120 and a second welding strip 130, wherein the battery piece body 110 is in a rectangular plate shape and is used for receiving light and generating electricity, and the battery piece body 110 is provided with a first surface 111 and a second surface 112, namely two planes corresponding to the rectangular plate shape; the first welding strips 120 are welded on the first surface 111, and the first welding strips 120 are attached to the first surface 111; the first bonding pads 120 have a plurality, and the plurality of first bonding pads 120 are arranged parallel to each other and at equal intervals, and in one embodiment, the number of first bonding pads 120 is between 50 and 500; the second welding strips 130 are welded on the second surface 112, and the second welding strips 130 are attached to the second surface 112; the second bonding pads 130 have a plurality, and the plurality of second bonding pads 130 are arranged parallel to each other and at equal intervals, and in one embodiment, the number of second bonding pads 130 is between 50 and 500; it should be noted that the first solder strip 120 is disposed parallel to the second solder strip 130.

In one embodiment, the cross-sectional shape of the first and/or second solder strips 120, 130 may take the form of a triangle, circle, rectangle, or trapezoid, in other words, the first and/or second solder strips 120, 130 may take the form of a triangular solder strip, a circular solder strip, a flat solder strip (rectangular or trapezoidal in cross-section), or the like.

The connection member 200, as shown in fig. 1 and 2, the connection member 200 is used for connection between the battery cells 100. The connection member 200 is disposed between the two battery cells 100, and the two battery cells 100 are welded in a string by the connection member 200. In one embodiment, the connector 200 takes the form of a bus bar that is arranged in a flat shape that is welded with the first and second solder strips 120, 130 of the two battery cells 100, respectively, to form a string of photovoltaic cells.

Specifically, as shown in fig. 2 to 6, the battery cells 100 are stacked end to end in the direction of the first and second bonding tapes 120 and 130 such that the side portions of two battery cells 100 overlap to form a stacking space 300, the stacking space 300 means that two sides of the battery cells 100 that are stacked to be in contact with each other and a space between the two sides, that is, the first and second bonding tapes 120 and 130 in the overlapping region are located in the stacking space 300, and the connection member 200 is welded to the first and second bonding tapes 120 and 130 located in the stacking space 300, respectively (in the stacking space 300, one battery cell 100 provides the first bonding tape 120 and the other battery cell 100 provides the second bonding tape 130), and the connection member 200 may be located in or outside the stacking space 300, so that the adjacent two battery cells 100 are connected with the connection member 200 to form a photovoltaic cell string.

In one embodiment, as shown in fig. 2-4, two battery cells 100 are stacked end to end with a connector 200 between the two battery cells 100, i.e., the connector 200 is located in the stacking space 300, and the connector 200 is soldered with the first solder strip 120 and the second solder strip 130, respectively, to form a photovoltaic cell string.

In another embodiment, as shown in fig. 5-8, one end of the first solder strip 120 extends beyond the first face 111, in other words, the length of the first solder strip 120 is greater than the length of the battery cell body 110, such that one end of the first solder strip 120 is located beyond the first face 111 and the other end is flush with the side edge of the first face 111; thus, the first bonding strips 120 have a plurality of groups, and one ends of the plurality of first bonding strips 120 extending beyond the first surface 111 together form an extension region 140, that is, the side of the battery cell unit 100 has an extension region 140, and the extension region 140 is formed by the first bonding strips 120; the extension region 140 is used to overlap another battery cell 100 with an opposite side, i.e., a side of the battery cell 100 opposite to the extension region 140, i.e., a side at which the end of the first solder strip 120 is flush, and form an overlapping space 300. It should be noted that, on the opposite side, the ends of the first solder strips 120 are flush, and the lengths of the two ends of the second solder strips 130 are flush with the second face 112, so that each battery cell 100 has only one extension area 140 formed by the first solder strips 120.

Further, as shown in fig. 5 to 8, the battery cells 100 are connected in a stacked manner by the extension regions 140, specifically, the extension region 140 of one battery cell 100 is stacked and covered on the second solder strip 130 of the opposite region 150 in the other battery cell 100, so as to form a stacked space 300, where the opposite region 150 refers to the side of the battery cell 100 opposite to the extension region 140; the first solder ribbon 120 and the second solder ribbon 130 are both positioned in the stacking space 300, and the first solder ribbon 120 and the second solder ribbon 130 in the stacking space 300 are connected by the connecting piece 200, so that the photovoltaic cell string is formed.

Still further, as shown in fig. 7 to 8, the connection member 200 may be located inside the stacking space 300 or outside the stacking space 300, in other words, the first and second bonding pads 120 and 130 may be located on the same side of the connection member 200 or on one side of the connection member 200; specifically, when the first solder strip 120 and the second solder strip 130 are located on the same side of the connector 200, the first solder strip 120 and the second solder strip 130 are located in the stacking space 300, the connector 200 is located on the first solder strip 120, and the connector 200, the first solder strip 120 and the second solder strip 130 are sequentially located from top to bottom (the first solder strip 120 and the second solder strip 130 can be staggered and located on the same horizontal position), and the connector 200 presses the first solder strip 120 and the second solder strip 130 downwards to complete thermocompression bonding, thereby forming a string; when the first solder strip 120 and the second solder strip 130 are located at different sides of the connecting piece 200, the first solder strip 120, the second solder strip 130 and the connecting piece 200 are all located in the stacking space 300, and the first solder strip 120, the connecting piece 200 and the second solder strip 130 are sequentially arranged from top to bottom, and the connecting piece 200 is respectively welded with the first solder strip 120 and the second solder strip 130 at two sides, so that strings are formed.

The application also provides a photovoltaic module, and the photovoltaic module includes the photovoltaic cell cluster, and photovoltaic cell cluster structure is the same with above-mentioned, and here no more tired.

Working principle/steps:

the battery cells 100 are stacked end to end, and the two battery cells 100 are welded through the connecting piece 200 to complete battery cell strings.

The technical effects are as follows:

1. the application provides a novel connection structure of battery piece, welds preceding battery piece unit 100 and the welding strip of the battery piece unit 100 of back and concatenates through the busbar, has replaced tradition to connect battery piece unit 100 through conductive adhesive, has greatly reduced battery piece unit 100 concatenation cost on the one hand, and on the other hand is connected for conductive adhesive, has also improved electricity generation and conductive power.

2. The connecting piece 200 connects the first welding strip 120 and the second welding strip 130 of the two battery chip units 100, the first welding strip 120 and the second welding strip 130 can be arranged on the same side or different sides of the connecting piece 200, and the application provides various connecting embodiments, adopts different welding means for different processes, and improves process compatibility.

While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. A string of photovoltaic cells, comprising:

battery cell (100), the battery cell (100) having at least two, each battery cell (100) comprising:

a battery piece body (110), the battery piece body (110) having a first face (111) and a second face (112);

a plurality of first welding strips (120), wherein the first welding strips (120) are welded on the first surface (111), and the first welding strips (120) are attached to the first surface (111); and

a plurality of second welding strips (130), wherein the second welding strips (130) are welded on the second surface (112), and the second welding strips (130) are attached to the second surface (112);

a connection member (200), the connection member (200) being used for connecting the battery cell units (100);

the battery piece unit (100) is overlapped end to end along the direction of the first welding strip (120) or the second welding strip (130) to form an overlapped space (300), and the connecting piece (200) is welded with the first welding strip (120) and the second welding strip (130) which are positioned in the overlapped space (300) respectively.

2. The string of photovoltaic cells according to claim 1, characterized in that one end of the first solder strip (120) extends beyond the first face (111) to form an extension region (140), the extension region (140) forming the stacking space (300) with an opposing region (150) of another cell unit (100), wherein the opposing region (150) is the side of the cell unit (100) opposite to the extension region (140).

3. The string of photovoltaic cells according to claim 2, characterized in that, within said stacking space (300), said first (120) and second (130) solder strips are located on the same side of said connector (200), said first (120) and second (130) solder strips being both soldered to said connector (200).

4. The string of photovoltaic cells according to claim 2, characterized in that, within said stacking space (300), said first (120) and second (130) solder strips are located on opposite sides of said connector (200), said first (120) and second (130) solder strips being soldered to said connector (200).

5. The string of photovoltaic cells according to claim 2, characterized in that the end of the first solder strip (120) remote from the extension (140) is flush with the edge of the cell body (110).

6. The string of photovoltaic cells according to claim 2 or 5, characterized in that the second solder strips (130) are flush with the edges of the cell body (110) at both ends.

7. The string of photovoltaic cells according to claim 6, characterized in that the first (120) and/or the second (130) solder strips have a triangular, circular, rectangular or trapezoidal cross section.

8. The string of photovoltaic cells according to claim 1, characterized in that the first solder strips (120) are arranged parallel to the second solder strips (130) and that the number of first solder strips (120) and second solder strips (130) in each of the battery cells (100) is between 50-500.

9. The string of photovoltaic cells according to claim 1, characterized in that the connection (200) is a busbar, which is flat.

10. Photovoltaic module, characterized in that it comprises a string of photovoltaic cells according to any one of claims 1 to 9.