Conductive component, solar cell string and photovoltaic module

Abstract

The invention relates to a conductive component, a solar cell string and a photovoltaic module. The periphery of the conductive component is provided with a plurality of welding areas and a plurality of adhesive areas, and the plurality of welding areas and the plurality of adhesive areas are arranged in a staggered manner along a first direction. The periphery of the conductive part is further provided with a plurality of weld-aid parts, the weld-aid parts correspond to the welding areas respectively, and each weld-aid part at least partially wraps the conductive part in the circumferential direction of the conductive part in the welding area. Therefore, the welding-aid part is not in contact with the fixed glue point, so that the bonding force between the conductive part and the fixed glue point is increased, the reliability of connection between the conductive part and the battery piece is ensured, the problem of poor pseudo soldering is avoided, and the use performance of the photovoltaic module is ensured.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a conductive component, a solar cell string and a photovoltaic module. Background Art

[0002] With the continuous development of photovoltaic module technology, the number of busbars in solar cells has experienced MBB (Multi-Busbar) and SMBB (i.e. Super MBB). The multi-busbar technology of photovoltaic modules is a method to improve the design and manufacturing of photovoltaic modules. Traditional photovoltaic modules usually use 2 to 5 busbars, while multi-busbar technology can use 9 or even more busbars.

[0003] Busbarless Technology (0BB) is an emerging photovoltaic module manufacturing technology that improves the efficiency of solar cells and reduces costs. In crystalline silicon solar cells, the busbar is a metal wire used to collect current, and there are usually multiple busbars. Busbarless technology eliminates these busbars and uses more and thinner metal wires or conductive materials to collect current. The connection between the metal wire or conductive material and the cell is usually an alloy connection, such as metal welding; or a non-alloy connection, such as an adhesive connection.

[0004] In the early days, the metal wire or conductive material used had no flux component on its surface, and flux was usually sprayed on the main grid of the cell. Later, with the continuous development of photovoltaic technology, the metal wire became thinner and thinner, and the flux component required for a single wire became relatively less. At the same time, in order to avoid the adverse effects of flux residue caused by uneven flux spraying on the cell, the method of soaking the entire metal wire in flux was gradually adopted, so that the surface of the metal wire had a flux part to ensure that the alloy connection was firm and reliable.

[0005] The current metal wire uses a full immersion method to obtain the soldering part, which is suitable for use in the multi-busbar battery process. If this method is used in the current 0BB bonding process, there will be obvious problems: using a metal wire with a soldering component on the entire surface, the acidic components in the soldering flux will inhibit the activity of the catalytic components in the adhesive, and the acidic components in the soldering flux will form an alloy coating on the surface of the metal wire, reducing the bonding force between the adhesive and the metal wire.

[0006] In summary, the full immersion method of obtaining flux for the metal wire used in the 0BB bonding process will affect the firmness of the non-alloy connection, resulting in insufficient adhesion between the metal wire and the battery cell, and then poor solder joints are likely to occur between the metal wire and the battery cell, affecting the performance of the photovoltaic module. Summary of the invention

[0007] Based on this, it is necessary to provide a conductive component, a solar cell string and a photovoltaic module, which can increase the bonding force between the conductive component and the fixed glue point, ensure the reliability of the connection between the conductive component and the battery cell, avoid the problem of poor solder joints between the conductive component and the battery cell, so as to ensure the performance of the photovoltaic module.

[0008] A conductive component, wherein the outer periphery of the conductive component has a plurality of welding areas and a plurality of adhesive areas, and the plurality of welding areas and the plurality of adhesive areas are arranged alternately along a first direction;

[0009] The outer periphery of the conductive component further has a plurality of soldering portions, the plurality of soldering portions respectively corresponding to the plurality of welding areas, and each of the soldering portions at least partially covers the conductive component along the circumference of the conductive component in the welding area.

[0010] In one embodiment of the present application, along the first direction, the welding area is located at the end of the conductive component, so that the soldering portion is located at the end of the conductive component;

[0011] Alternatively, along the first direction, the adhesive area is located at an end of the conductive component.

[0012] In one embodiment of the present application, the length of the welding area along the first direction is the same as and / or different from the length of the adhesive area along the first direction;

[0013] and / or, the lengths of the welding areas along the first direction are the same and / or different;

[0014] And / or, the lengths of the adhesive areas along the first direction are the same and / or different.

[0015] In an embodiment of the present application, a length of the welding area along the first direction is greater than a length of the adhesive area along the first direction.

[0016] In one embodiment of the present application, the conductive component is a conductive metal wire or a conductive metal strip;

[0017] The diameter of the conductive component is 0.1 mm to 0.3 mm; or, the longitudinal section of the conductive component is an equilateral triangle, and the side length of the longitudinal section of the conductive component is 0.1 mm to 0.3 mm.

[0018] In one embodiment of the present application, the conductive component includes a conductive substrate and a metal coating, and the metal coating is coated on the outer side of the conductive substrate;

[0019] The soldering portion is circumferentially coated on the metal coating;

[0020] Wherein, each of the soldering parts is arranged in a liquid state, or each of the soldering parts is arranged in a solid state.

[0021] A solar cell string, comprising a cell sheet, a bonding portion and a conductive component as described in any one of the above technical features;

[0022] The bonding portion includes a plurality of fixed glue points, the plurality of fixed glue points are arranged on the surface of the battery sheet at intervals along a first direction, and the fixed glue points are arranged corresponding to the adhesive areas of the conductive component;

[0023] The conductive component is fixed to the surface of the battery cell by welding in the welding area through the soldering part, and the conductive component is bonded and connected with the fixed glue point in the adhesive area.

[0024] In one embodiment of the present application, the length of the soldering portion along the first direction is less than or equal to the length of the welding area along the first direction;

[0025] And / or, the length of the fixed glue point along the first direction is less than or equal to the length of the adhesive area along the first direction.

[0026] In one embodiment of the present application, there are multiple bonding parts, and the multiple bonding parts are arranged on the surface of the battery cell at intervals along a second direction perpendicular to the first direction;

[0027] There are multiple conductive components, each bonding portion is connected to one conductive component, and each conductive component is provided with multiple spaced soldering portions.

[0028] In one embodiment of the present application, the surface of the battery cell has a conductive area, a plurality of the conductive areas are arranged on the surface of the battery cell at intervals along the first direction, and the conductive areas extend along a second direction perpendicular to the first direction;

[0029] The conductive area corresponds to the welding area, and the soldering part solders the conductive component to the conductive area of ​​the battery cell in the welding area;

[0030] The fixed glue point is arranged between two adjacent conductive areas.

[0031] In one embodiment of the present application, the battery cell has multiple conductive layers, at least one conductive layer is arranged in each conductive area, and the conductive layer extends along the second direction. When at least two conductive layers are arranged in the conductive area, at least two conductive layers are arranged at intervals along the first direction.

[0032] A photovoltaic module, comprising a cover plate, a back plate and a plurality of solar cell strings as described in any one of the above technical features, wherein the plurality of solar cell strings are connected in series along a first direction;

[0033] The cover plate and the back plate are arranged on both sides of the solar cell string, and the cover plate, the back plate and the solar cell string are packaged by adopting a packaging process.

[0034] After adopting the above technical solution, this application has at least the following technical effects:

[0035] The conductive component, solar cell string and photovoltaic module of the present application are provided with multiple welding areas and multiple adhesive areas on the periphery of the conductive component, the multiple welding areas and the multiple adhesive areas are staggered on the conductive component along the first direction, and multiple soldering parts are respectively provided in the welding areas, so that the conductive component has a soldering part in the welding area and no soldering part in the adhesive area. When the conductive component is connected to the battery cell, the soldering part welds and fixes the conductive component to the surface of the battery cell in the welding area, and the conductive component is connected to the fixed glue point in the adhesive area, so that the conductive component is fixed to the battery cell by welding and gluing.

[0036] In this way, after the conductive component is fixed to the battery cell, the soldering part helps the conductive component to be welded and fixed to the battery cell in the welding area, thereby increasing the firmness of the connection between the conductive component and the battery cell. At the same time, the soldering part of the conductive component will not contact the fixed glue point to increase the bonding force between the conductive component and the fixed glue point, thereby ensuring the reliability of the bonding connection between the conductive component and the battery cell, thereby ensuring sufficient tensile force between the conductive component and the battery cell, thereby ensuring the reliability of the connection between the conductive component and the battery cell, avoiding the problem of poor solder joints between the conductive component and the battery cell, thereby ensuring the performance of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] FIG. 1 is a schematic diagram of a solar cell string according to an embodiment of the present application.

[0038] FIG. 2 is a partial enlarged view of the solar cell string at point A shown in FIG. 1 .

[0039] FIG. 3 is a schematic diagram showing the correspondence between the conductive component, the solar cell and the bonding portion in the solar cell string shown in FIG. 2 .

[0040] FIG. 4 is a schematic cross-sectional view of the conductive component shown in FIG. 3 along a first direction.

[0041] FIG. 5 is a schematic diagram of a solar cell string according to another embodiment of the present application.

[0042] FIG. 6 is a partial enlarged view of the solar cell string at position B shown in FIG. 5 .

[0043] FIG. 7 is a schematic cross-sectional view of an embodiment of the conductive component shown in FIG. 4 along a first direction.

[0044] FIG. 8 is a schematic diagram of another embodiment of the conductive component shown in FIG. 4 .

[0045] Among them: 100, solar cell string; 110, battery cell; 111, conductive area; 112, conductive layer; 113, welding pad; 120, bonding part; 121, fixed glue point; 130, conductive component; 131, welding area; 132, adhesive area; 133, conductive substrate; 134, metal coating; 135, soldering part. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0047] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0048] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0050] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "on" or "below" a second feature, etc., or the like, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0051] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0052] Understandably, Busbarless Technology (0BB) uses more and thinner metal wires or conductive materials to collect current. The entire metal wire is immersed in flux so that the surface of the metal wire has a flux portion to ensure that the alloy connection is firm and reliable. However, when using a metal wire with flux components on the entire surface, the acidic components in the flux will inhibit the activity of the catalytic components in the adhesive, and the acidic components in the flux will form an alloy coating on the surface of the metal wire, reducing the bonding strength between the adhesive and the metal wire, resulting in insufficient bonding strength between the metal wire and the cell, and then the problem of poor solder joints between the metal wire and the cell is prone to occur, affecting the performance of the photovoltaic module.

[0053] To this end, referring to Figures 1 to 4, the present application provides a conductive component 130. Figure 1 is a schematic diagram of a solar cell string 100 of an embodiment of the present application, Figure 2 is a partial enlarged view of the solar cell string 100 shown in Figure 1 at A, and Figure 4 is a cross-sectional schematic diagram of the conductive component shown in Figure 3 along the first direction. The conductive component 130 is applied to the solar cell string 100, and after the solar cell strings 100 are connected to each other, they can be packaged using a packaging process to form a photovoltaic module (not shown).

[0054] The conductive component 130 of the present application can prevent the soldering portion 135 from inhibiting the activity of the catalytic component in the fixed glue point 121, increase the bonding force between the soldering portion 135 and the fixed glue point 121, so as to ensure the reliability of the welding connection between the conductive component 130 and the battery cell 110, and further ensure that there is sufficient tension between the conductive component 130 and the battery cell 110, so as to ensure the reliability of the connection between the conductive component 130 and the battery cell 110, avoid the problem of poor solder joints between the conductive component 130 and the battery cell 110, so as to ensure the performance of the photovoltaic module.

[0055] In order to better illustrate the specific structure of the conductive component 130, the structure of the solar cell string 100 is briefly introduced here. The solar cell string 100 includes a battery cell 110, a bonding portion 120, and a conductive component 130 of the present application. The bonding portion 120 includes a plurality of fixed glue points 121, and the plurality of fixed glue points 121 are arranged on the surface of the battery cell 110 at intervals along the first direction. The conductive component 130 can be welded and fixed to the surface of the battery cell 110, and the conductive component 130 can also be bonded and fixed to the surface of the battery cell 110 through the fixed glue points 121.

[0056] The cell 110 is made of silicon wafers. The cell 110 is used to absorb solar energy and convert it into electrical energy. The specific structure and principle of the cell 110 are prior art, and the cell 110 will not be described in detail here. The cell 110 extends along a first direction and a second direction. The first direction and the second direction are shown in Figures 1 and 2. The first direction is perpendicular to the second direction. The first direction is the length direction of the cell 110, and the second direction is the width direction of the cell 110. The cell 110 has a certain length dimension along the first direction and a certain width dimension along the second direction.

[0057] The conductive component 130 is disposed on the surface of the battery cell 110 along the first direction, and alloy connection and non-alloy connection are adopted between the conductive component 130 and the battery cell 110 to ensure that there is sufficient tension between the conductive component 130 and the battery cell 110, thereby ensuring the reliability of the connection between the conductive component 130 and the battery cell 110. The bonding portion 120 is disposed on the surface of the battery cell 110, and the conductive component 130 and the bonding portion 120 are fixed by bonding connection to achieve non-alloy connection between the conductive component 130 and the battery cell 110. The area of ​​the conductive component 130 other than the corresponding bonding portion 120 is welded to the battery cell 110 to achieve alloy connection between the conductive component 130 and the battery cell 110.

[0058] Specifically, the bonding portion 120 is disposed on the surface of the battery cell 110 along the first direction, the conductive component 130 is disposed on the bonding portion 120, and the conductive component 130 is welded to the battery cell 110 except for the area corresponding to the bonding portion 120, so as to realize the electrical connection between the conductive component 130 and the battery cell 110. It can be understood that the battery cell 110 has a front side and a back side disposed opposite to each other, and only the front side of the battery cell 110 is illustrated in FIG1 and FIG3, and the back side of the battery cell 110 is not illustrated.

[0059] Moreover, both the front and back sides of the battery cell 110 have adhesive portions 120, and each adhesive portion 120 fixes a conductive component 130. In other words, the conductive components 130 are disposed on both the upper surface (front side) and the lower surface (back side) of the battery cell 110, and the conductive components 130 are fixed to the surface of the battery cell 110 through the corresponding adhesive portions 120 and welding connections. It is worth noting that the connection principle between the upper surface of the battery cell 110 and the conductive component 130 is substantially the same as the connection principle between the lower surface and the conductive component 130, and the following text only takes the connection between the surface of the battery cell 110 and the conductive component 130 as an example for explanation.

[0060] The bonding portion 120 is provided on the surface of the battery cell 110, and the conductive component 130 is bonded to the bonding portion 120 and welded to the area of ​​the battery cell 110 other than the bonding portion 120. In this way, the conductive component 130 can be fixed to the surface of the battery cell 110 by gluing and welding, so that the conductive component 130 is reliably fixed to the battery cell 110. The gluing and welding methods can provide sufficient tension between the conductive component 130 and the battery cell 110, ensure the connection reliability between the conductive component 130 and the battery cell 110, reduce costs, and reduce shading to ensure photoelectric conversion efficiency.

[0061] At the same time, after the conductive component 130 is fixed to the battery cell 110 by welding, the area of ​​the conductive component 130 other than the corresponding bonding portion 120 can be electrically connected to the battery cell 110 to ensure the electrical contact performance between the conductive component 130 and the battery cell 110, so that the conductive component 130 can normally collect the current generated by the battery cell 110. In addition, the plurality of fixed glue points 121 in the bonding portion 120 are arranged at intervals along the first direction, that is, there is a certain distance between two adjacent fixed glue points 121 along the first direction, so that the conductive component 130 is fixed to the surface of the battery cell 110 by gluing.

[0062] The specific structure of the conductive component 130 according to an embodiment is introduced below.

[0063] Referring to Figures 2 to 4, in one embodiment, the periphery of the conductive component 130 has a plurality of welding areas 131 and a plurality of adhesive areas 132, and the plurality of welding areas 131 and the plurality of adhesive areas 132 are arranged alternately along a first direction. The periphery of the conductive component 130 also has a plurality of soldering portions 135, and the plurality of soldering portions 135 correspond to the plurality of welding areas 131 respectively, and each soldering portion 135 at least partially covers the conductive component 130 along the circumference of the conductive component 130 in the welding area 131.

[0064] After the soldering portion 135 is disposed on the welding area 131 of the conductive component 130, the soldering portion 135 can facilitate the soldering connection between the conductive component 130 and the battery cell 110, so as to further improve the firmness of the soldering connection between the conductive component 130 and the battery cell 110. The soldering portion 135 here is a soldering flux layer coated on the conductive component 130.

[0065] At the same time, the adhesive area 132 is arranged corresponding to the fixed glue point 121, and the soldering part 135 is arranged in the welding area 131 of the conductive component 130, and there is no soldering part 135 in the adhesive area 132 of the conductive component 130. In this way, a plurality of soldering parts 135 are arranged in the conductive component 130 at intervals along the first direction, and there is a certain distance between two adjacent soldering parts 135, and the distance is the adhesive area 132.

[0066] That is to say, the outer wall of the conductive component 130 is staggered with flux layers and flux-free layers, the adhesive area 132 without the flux layer corresponds to the fixed glue point 121, and the welding area 131 with the flux layer corresponds to the area of ​​the battery cell 110 other than the fixed glue point 121 through the soldering part 135.

[0067] When the conductive component 130 is connected to the bonding portion 120 and the battery cell 110, the welding area 131 of the conductive component 130 can be welded to the battery cell 110 through the soldering portion 135, and the adhesive area 132 of the conductive component 130 can be bonded to the fixed glue point 121. The soldering portion 135 can facilitate the welding connection between the conductive component 130 and the battery cell 110 in the welding area 131, ensuring the reliability of the welding connection between the conductive component 130 and the battery cell 110, and the fixed glue point 121 realizes the bonding connection between the conductive component 130 and the battery cell 110.

[0068] At the same time, since there is no soldering part 135 in the adhesive area 132, the acidic component in the soldering part 135 will not inhibit the activity of the catalytic component in the fixed glue point 121, and the soldering part 135 will not form an alloy coating at the corresponding conductive component 130 in the adhesive area 132. In this way, the bonding force between the conductive component 130 and the battery cell 110 bonded and connected by the fixed glue point 121 can be ensured, so as to ensure the firmness of the non-alloy connection between the conductive component 130 and the battery cell 110, to ensure the reliability of the connection between the conductive component 130 and the battery cell 110, to avoid the problem of poor solder joints between the conductive component 130 and the battery cell 110, and to ensure the output power of the photovoltaic module.

[0069] In the above embodiment, a plurality of welding areas 131 and a plurality of adhesive areas 132 are arranged on the periphery of the conductive component 130 . The plurality of welding areas 131 and the plurality of adhesive areas 132 are staggered. The conductive component 130 has a soldering portion 135 in the welding area 131 , but no soldering portion 135 in the adhesive area 132 . After the conductive component 130 is fixed to the battery cell 110, the soldering portion 135 helps the conductive component 130 to be welded and fixed to the battery cell 110 in the welding area 131, thereby increasing the firmness of the connection between the conductive component 130 and the battery cell 110. At the same time, the soldering portion 135 of the conductive component 130 will not contact the fixed glue point 121, thereby increasing the bonding force between the conductive component 130 and the fixed glue point 121, ensuring the reliability of the bonding connection between the conductive component 130 and the battery cell 110, and further ensuring that there is sufficient tension between the conductive component 130 and the battery cell 110, thereby ensuring the reliability of the connection between the conductive component 130 and the battery cell 110, avoiding the problem of poor solder joints between the conductive component 130 and the battery cell 110, and ensuring the performance of the photovoltaic module.

[0070] 3 and 4, in one embodiment, the soldering portion 135 completely covers the circumference of the conductive component 130 in the welding area 131. That is, the soldering portion 135 completely covers the conductive component 130 in the welding area 131 along the circumference of the conductive component 130, and the outer wall of the welding area 131 of the conductive component 130 is covered by the soldering portion 135. In this way, when the conductive component 130 is welded to the battery cell 110 in the welding area 131, the soldering portion 135 can improve the reliability of the welding connection between the conductive component 130 and the battery cell 110.

[0071] Of course, in other embodiments of the present application, the soldering portion 135 may also cover the surface of the conductive component 130 facing the battery cell 110 in the welding area 131. That is, the soldering portion 135 is arranged on the bottom surface of the welding area 131 of the conductive component 130, and when the conductive component 130 is welded to the battery cell 110, the soldering portion 135 can ensure the reliability of the connection between the conductive component 130 and the battery cell 110.

[0072] Referring to FIG. 1 to FIG. 4 , in one embodiment of the present application, the battery cell 110 is a busbar-free battery cell, and the conductive component 130 is fixed to the surface of the battery cell 110 along a first direction through a plurality of fixed glue points 121. At this time, the conductive component 130 is staggered with welding areas 131 and adhesive areas 132, and a soldering part 135 is provided on the welding area 131 to achieve welding connection and adhesive connection between the conductive component 130 and the battery cell 110, and avoid contact between the soldering part 135 and the fixed glue point 121.

[0073] Referring to FIG. 5 and FIG. 6 , in another embodiment of the present application, the cell 110 is a busbar-free cell, the conductive component 130 is fixed to the surface of the cell 110 along the first direction through a plurality of fixed glue points 121 and a welding pad 113, and the conductive component 130 is welded and glued to the welding pad 113, the plurality of fixed glue points 121 and the cell 110. FIG. 5 is a schematic diagram of a solar cell string 100 of another embodiment of the present application, and FIG. 6 is a partial enlarged view of the solar cell string 100 shown in FIG. 5 at position B.

[0074] A plurality of fixed glue points 121 are arranged along the first direction, and the welding pads 113 are arranged at both ends of the plurality of fixed glue points 121, that is, a structural form is formed in which the ends are the welding pads 113 and the middle is the plurality of fixed glue points 121, and the soldering part 135 is arranged in the welding area 131. In this way, the conductive component 130 is welded to the welding pad 113 and the area of ​​the battery cell 110 except the fixed glue points 121, and is bonded to the fixed glue points 121 in the adhesive area 132, and the soldering part 135 is prevented from contacting with the fixed glue points 121.

[0075] Of course, in other embodiments of the present application, a busbar may also be provided on the battery cell 110 .

[0076] Referring to FIG. 3 and FIG. 4 , in one embodiment, each soldering portion 135 is provided in a liquid state. That is, the soldering portion 135 is a liquid soldering flux layer. Of course, in other embodiments of the present application, each soldering portion 135 is provided in a solid state. That is, the soldering portion 135 is a solid soldering flux layer.

[0077] The soldering portion 135 is mainly formed by soldering flux coated on the soldering area 131 of the conductive component 130. The soldering flux can reduce the surface tension of the solder and improve the soldering performance, thereby improving the reliability of the soldering connection between the conductive component 130 and the battery cell 110. It is worth noting that the specific material of the soldering flux is prior art and will not be repeated here.

[0078] Moreover, the conductive component 130 is completely immersed to obtain the soldering portion 135 of the conductive component 130. Specifically, there is soldering flux in the soldering flux tank. Before the conductive component 130 is soldered to the battery cell 110, the conductive component 130 is passed through the soldering flux tank, and the conductive component 130 is completely immersed in the soldering flux in the soldering flux tank to form a soldering flux layer on the surface of the conductive component 130. After the conductive component 130 is pulled out of the soldering flux tank, the soldering flux layer of the conductive component 130 in the adhesive area 132 is evaporated by heating or other methods, that is, the soldering flux layer in the adhesive area 132 is removed, so that the conductive component 130 has a soldering flux layer in the welding area 131 to form the soldering portion 135, and there is no soldering flux layer in the adhesive area 132.

[0079] Subsequently, the conductive component 130 is transferred to the top of the battery cell 110, and the conductive component 130 is welded to the surface of the battery cell 110 at the welding area 131 by flux, and is bonded to the fixed glue point 121 at the adhesive area 132 to achieve welding connection and adhesive connection between the conductive component 130 and the battery cell 110, which can ensure a reliable connection between the conductive component 130 and the battery cell 110 while improving the bonding force between the conductive component 130 and the battery cell 110.

[0080] Referring to FIG. 1 to FIG. 4 , in one embodiment, the surface of the battery cell 110 has a conductive area 111, and a plurality of conductive areas 111 are arranged on the surface of the battery cell 110 at intervals along a first direction, and the conductive areas 111 extend along a second direction perpendicular to the first direction. The conductive area 111 corresponds to the welding area 131, and the soldering part 135 welds the conductive component 130 to the conductive area 111 of the battery cell 110 at the welding area 131. A fixed glue point 121 is arranged between two adjacent conductive areas 111.

[0081] The cell 110 is a busbar-free structure, and a plurality of conductive regions 111 are arranged on the surface of the cell 110, and the current of the cell 110 is collected through the conductive regions 111. The conductive regions 111 extend along the second direction, and the plurality of conductive regions 111 are arranged at intervals along the first direction, and the conductive component 130 and the conductive region 111 are intersected, and further, the conductive component 130 is arranged perpendicular to the conductive region 111, and the current of the cell 110 in the conductive region 111 is converged and transmitted through the conductive component 130.

[0082] Fixed glue points 121 are arranged between adjacent conductive areas 111, so that the conductive component 130 is bonded and fixed to the battery cell 110 through the fixed glue points 121. That is, the conductive areas 111 and the fixed glue points 121 are staggered along the first direction, and the welding areas 131 and the adhesive areas 132 on the conductive component 130 are staggered along the first direction. When the conductive component 130 corresponds to the battery cell 110, the welding area 131 and the soldering part 135 thereon correspond to the conductive area 111 of the battery cell 110, and the adhesive area 132 corresponds to the fixed glue points 121 on the battery cell 110, as shown in FIG. 3 .

[0083] In this way, when the conductive component 130 is connected to the battery cell 110, the conductive component 130 is welded and connected to the conductive area 111 of the battery cell 110 through the soldering portion 135 in the welding area 131, so as to fix the conductive component 130 to the battery cell 110 and realize the electrical connection between the conductive component 130 and the conductive area 111. At the same time, the fixed glue point 121 is bonded and connected to the adhesive area 132. In this way, the soldering portion 135 of the welding area 131 will not affect the activity of the catalytic component in the fixed glue point 121, thereby improving the bonding force between the conductive component 130 in the adhesive area 132 and the fixed glue point 121, and further reliably fixing the conductive component 130 to the battery cell 110.

[0084] Referring to FIG. 1 to FIG. 3 , in one embodiment, the battery cell 110 has a plurality of conductive layers 112, each conductive region 111 is provided with at least one conductive layer 112, the conductive layer 112 extends along the second direction, and when at least two conductive layers 112 are provided in the conductive region 111, at least two first conductive layers 112 are provided along the first direction. In other words, each conductive region 111 may be provided with at least one conductive layer 112 extending in the second direction, the conductive layer 112 is made of a conductive material, and the current of the battery cell 110 is collected through the conductive layer 112.

[0085] The conductive component 130 is welded to the conductive layer 112 at the welding area 131 through the soldering part 135, and the current collected by the conductive layer 112 is collected and transmitted through the conductive component 130. Moreover, when each conductive area 111 has at least two conductive layers 112, the at least two conductive layers 112 are arranged at intervals along the first direction, and there is a distance between two adjacent conductive layers 112 along the first direction. The conductive component 130 can simultaneously weld and connect multiple conductive layers 112 of the conductive area 111 through the soldering part 135 at the welding area 131.

[0086] Optionally, the conductive layer 112 is a grid line, a metal wire or other components capable of achieving current convergence. Optionally, in each conductive area 111, the number of conductive layers 112 can be the same or different. As shown in FIG3 , in this embodiment, four conductive layers 112 are provided in each conductive area 111. Of course, in other embodiments of the present application, other numbers of conductive layers 112 can also be provided in each conductive area 111.

[0087] 4 and 7 , in one embodiment, along the first direction, the welding area 131 is located at the end of the conductive component 130 so that the soldering portion 135 is located at the end of the conductive component 130. FIG7 is a cross-sectional view of an embodiment of the conductive component 130 shown in FIG4 along the first direction.

[0088] In FIG. 4 and FIG. 7 , the welding area 131 is located at the left end of the conductive component 130, and the welding area 131 and the adhesive area 132 are arranged on the outer wall of the conductive component 130 in the manner of welding area 131-adhesive area 132-welding area 131-adhesive area 132-…. Correspondingly, on the battery cell 110, the conductive area 111 is also located at the left end of the battery cell 110, and the conductive area 111 and the fixed glue point 121 are arranged on the battery cell 110 in the manner of conductive area 111-fixed glue point 121-conductive area 111-fixed glue point 121-….

[0089] In this way, the welding area 131 of the conductive component 130 and the soldering portion 135 thereon can correspond one-to-one with the conductive area 111 of the battery cell 110, and the adhesive area 132 can correspond one-to-one with the fixed glue point 121 provided on the battery cell 110. When the conductive component 130 is connected to the battery cell 110, the conductive component 130 is welded to the welding area 131 of the battery cell 110 through the soldering portion 135 at the welding area 131, and the conductive component 130 is bonded to the fixed glue point 121 through the adhesive area 132, so as to improve the bonding force of the fixed glue point 121 bonding the conductive component 130 and the battery cell 110, and improve the reliability of the connection between the conductive component 130 and the battery cell 110.

[0090] 3 and 8 , in another embodiment, along the first direction, the adhesive area 132 is disposed at the end of the conductive component 130 so that there is a preset distance between the soldering portion 135 on the welding area 131 and the end of the conductive component 130. FIG8 is a schematic diagram of another embodiment of the conductive component 130 shown in FIG4 .

[0091] In FIG. 3 and FIG. 8 , the adhesive area 132 is located at the left end of the conductive component 130, and the welding area 131 and the adhesive area 132 are arranged outside the conductive component 130 in the manner of adhesive area 132-welding area 131-adhesive area 132-welding area 131-…. Correspondingly, on the battery cell 110, the fixed glue point 121 is also located at the left end of the battery cell 110, and the conductive area 111 and the fixed glue point 121 are arranged on the battery cell 110 in the manner of fixed glue point 121-conductive area 111-fixed glue point 121-conductive area 111-….

[0092] In this way, the welding area 131 of the conductive component 130 and the soldering portion 135 thereon can correspond one-to-one with the conductive area 111 of the battery cell 110, and the adhesive area 132 can correspond one-to-one with the fixed glue point 121 provided on the battery cell 110. When the conductive component 130 is connected to the battery cell 110, the conductive component 130 is welded to the welding area 131 of the battery cell 110 through the soldering portion 135 at the welding area 131, and the conductive component 130 is bonded to the fixed glue point 121 through the adhesive area 132, so as to improve the bonding force of the fixed glue point 121 bonding the conductive component 130 and the battery cell 110, and improve the reliability of the connection between the conductive component 130 and the battery cell 110.

[0093] Of course, in this embodiment, when the adhesive area 132 is located at the left end of the conductive component 130, there is a preset distance between the welding area 131 and the soldering portion 135 thereon and the left end of the conductive component 130. In this case, the fixed glue point 121 may not be set at the leftmost end of the battery cell 110, and the leftmost adhesive area 132 may not correspond to the fixed glue point 121.

[0094] It is worth noting that, in principle, the number of welding areas 131 and adhesive areas 132 in the conductive component 130 is not limited. The number of welding areas 131 and adhesive areas 132 is set according to the length of the conductive component 130 along the first direction, and the length of the conductive component 130 along the first direction is related to the length of the battery cell 110 along the first direction. In this application, it is only necessary to ensure that the welding areas 131 and the adhesive areas 132 are staggered along the first direction of the conductive component 130, and the welding portion is set in the welding area 131, and no welding area 131 is set in the adhesive area 132.

[0095] In one embodiment, the length of the welding area 131 along the first direction is the same as and / or different from the length of the adhesive area 132 along the first direction. It is worth noting that the length of the welding area 131 along the first direction and the length of the adhesive area 132 along the first direction are not limited in principle, as long as the welding area 131 and the adhesive area 132 are staggered along the first direction on the conductive component 130, so that the soldering portion 135 is arranged in the welding area 131, and not in the adhesive area 132.

[0096] Optionally, the length of the welding area 131 along the first direction is the same as the length of the adhesive area 132 along the first direction. That is, the welding area 131 and the adhesive area 132 are set to be equal in length and are staggered along the first direction on the conductive component 130. Referring to Figures 3, 4, 6 and 7, optionally, the length of the welding area 131 along the first direction is also different from the length of the adhesive area 132 along the first direction, that is, the welding area 131 and the adhesive area 132 are set to be unequal in length and are staggered along the first direction on the conductive component 130.

[0097] Of course, in other embodiments of the present application, the length of part of the welding area 131 along the first direction may be the same as the length of the adhesive area 132 along the first direction, and the length of part of the welding area 131 along the first direction may be different from the length of the adhesive area 132 along the first direction, as long as the welding area 131 and the adhesive area 132 are staggered along the first direction on the conductive component 130.

[0098] 3, 4, 6 and 7, in one embodiment, the lengths of the welding areas 131 along the first direction are the same and / or different. The length of the welding area 131 along the first direction is not limited in principle, as long as the soldering portion 135 is provided on the welding area 131, the conductive component 130 is welded and connected to the conductive area 111 of the battery cell 110 at the welding area 131 through the soldering portion 135, so as to realize the electrical connection between the conductive component 130 and the battery cell 110.

[0099] In this embodiment, referring to FIG. 3 , FIG. 4 , FIG. 6 and FIG. 7 , the lengths of the welding areas 131 along the first direction are the same. That is, the welding areas 131 are distributed with equal lengths along the first direction, so that the adhesive areas 132 are distributed with equal spacing on the conductive component 130. Of course, in other embodiments of the present application, the lengths of the welding areas 131 along the first direction are different, or the lengths of some welding areas 131 along the first direction are the same, and the lengths of some welding areas 131 along the first direction are different.

[0100] Referring to FIG. 3 , FIG. 4 , FIG. 6 and FIG. 7 , in one embodiment, the lengths of the adhesive areas 132 along the first direction are the same and / or different. The length of the adhesive area 132 along the first direction is not limited in principle, as long as the soldering portion 135 is not provided in the adhesive area 132 . In this way, the conductive component 130 is bonded and connected to the fixed glue point 121 in the adhesive area 132 , which can prevent the acidic components in the soldering portion 135 from inhibiting the activity of the catalytic components in the fixed glue point 121 , and ensure the bonding force of the fixed glue point 121 connecting the conductive component 130 and the battery cell 110 .

[0101] In this embodiment, referring to FIG. 3 , FIG. 4 , FIG. 6 and FIG. 7 , the lengths of the adhesive areas 132 along the first direction are the same. That is, the adhesive areas 132 are distributed with equal lengths along the first direction, so that the welding areas 131 are distributed with equal spacing on the conductive component 130. Of course, in other embodiments of the present application, the lengths of the adhesive areas 132 along the first direction are different, or the lengths of some adhesive areas 132 along the first direction are the same, and the lengths of some adhesive areas 132 along the first direction are different.

[0102] In this embodiment, the length of the welding area 131 along the first direction is greater than the length of the adhesive area 132 along the first direction. That is, the lengths of the welding areas 131 and adhesive areas 132 along the first direction are the same, and the length of the welding area 131 is greater than the length of the adhesive area 132.

[0103] In this way, the length of the welding connection between the conductive component 130 and the battery cell 110 is greater than the length of the adhesive connection. While ensuring the reliable connection between the conductive component 130 and the battery cell 110 through the adhesive connection and the welding connection, the length of the electrical connection between the conductive component 130 and the battery cell 110 can also be guaranteed to ensure the electrical contact performance between the conductive component 130 and the battery cell 110, so that the conductive component 130 can normally collect the current generated by the battery cell 110.

[0104] In one embodiment, the length of the adhesive area 132 along the first direction is 1 / 5 to 1 / 2 of the length of the welding area 131 along the first direction. In this way, the connection between the conductive component 130 and the battery cell 110 can be reliable, and the length of the electrical connection between the conductive component 130 and the battery cell 110 can also be guaranteed.

[0105] 3, 4, 6 and 7, in one embodiment, the length of the soldering portion 135 along the first direction is less than or equal to the length of the welding area 131 along the first direction. In other words, the soldering portion 135 at least partially covers the welding area 131 along the first direction to ensure the electrical connection length between the conductive component 130 and the conductive area 111.

[0106] 3, 4, 6 and 7, the length of the soldering portion 135 along the first direction is equal to the length of the welding area 131 along the first direction. Of course, in other embodiments of the present application, the length of the soldering portion 135 along the first direction may also be less than the length of the welding area 131 along the first direction.

[0107] 3, 4, 6 and 7, in one embodiment, the length of the fixed glue point 121 along the first direction is less than or equal to the length of the adhesive area 132 along the first direction. In other words, the fixed glue point 121 at least partially covers the adhesive area 132 along the first direction, so that the fixed glue point 121 effectively bonds and connects the conductive component 130 and the battery cell 110.

[0108] It is worth noting that the type of the conductive component 130 is not limited in principle, as long as the conductive component 130 is conductive, technical personnel in this field can choose it according to their needs, as long as it can achieve effective collection of current on the battery cell 110 and at the same time reduce the shielding of light by the conductive component 130, thereby improving the efficiency of the photovoltaic module.

[0109] Referring to Figures 1, 2, 5 and 6, in this embodiment, the conductive component 130 is a conductive metal wire, which has a thinner wire diameter, which can collect current while reducing light blocking and improving the efficiency of the photovoltaic module. Of course, in other embodiments of the present application, the conductive component 130 can also be a conductive metal strip or a conductive wire, etc.

[0110] Moreover, after the conductive component 130 of the present application uses a conductive metal wire to collect current, when the solar cell string 100 is used to prepare a photovoltaic module, a thinner packaging film can be used to encapsulate the photovoltaic module, thereby reducing the material cost, and reducing the amount of metal electrodes, thereby reducing the manufacturing cost of the photovoltaic module. In this way, the solar cell string 100 can use more and thinner conductive components 130 to collect current, shorten the transmission distance of the current, and help increase the power.

[0111] Referring to Figures 1, 2, 5 and 6, in one embodiment, the diameter of the conductive component 130 is 0.1 mm to 0.3 mm. That is, the longitudinal cross-section of the conductive component 130 is circular, and the conductive component 130 is in a relatively thin filamentous structure. Since the present application provides a plurality of conductive components 130, even if the diameter of the conductive component 130 is relatively thin, it will not affect the current collection of the solar cell string 100. At the same time, the thin diameter of the conductive component 130 can also reduce the light blocking, improve the efficiency of the photovoltaic module, and can use a thinner packaging film for packaging, reduce the amount of metal electrodes, and reduce the manufacturing cost of the photovoltaic module.

[0112] Of course, in other embodiments of the present application, the longitudinal cross-section of the conductive component 130 is an equilateral triangle, and the side length of the longitudinal cross-section of the conductive component 130 is 0.1 mm to 0.3 mm. Since the present application provides multiple conductive components 130, even if the longitudinal cross-section of the conductive component 130 is thin, it will not affect the current collection of the solar cell string 100. At the same time, the thin longitudinal cross-section of the conductive component 130 can also reduce light blocking, improve the efficiency of the photovoltaic module, and can use a thinner packaging film for packaging, reduce the amount of metal electrodes, and reduce the manufacturing cost of the photovoltaic module.

[0113] 1 to 3, 5 and 6, in one embodiment, there are a plurality of bonding portions 120, and the plurality of bonding portions 120 are spaced apart on the surface of the battery cell 110 along a second direction perpendicular to the first direction. There are a plurality of conductive components 130, each bonding portion 120 is connected to a conductive component 130, and each conductive component 130 is provided with a plurality of spaced soldering portions 135.

[0114] That is, the surface of the battery cell 110 is provided with a plurality of bonding portions 120 arranged at intervals along the second direction, and each bonding portion 120 is fixed with a conductive component 130. The plurality of conductive components 130 are respectively fixed to the surface of the battery cell 110 by welding connection and adhesive connection, so that the battery cell 110 can connect adjacent battery cells 110 through the plurality of conductive components 130 to collect the current generated by two adjacent battery cells 110, thereby realizing the preparation of a battery string. Optionally, in each bonding portion 120, the layout of the fixed glue points 121 is the same and / or different.

[0115] Referring to FIG. 1 , FIG. 2 , FIG. 5 and FIG. 6 , in one embodiment, the conductive component 130 is a conductive metal wire, and a plurality of conductive components 130 are fixed to the surface of the battery cell 110 by welding connection and adhesive connection. In this embodiment, the number of the conductive components 130 is twenty-four. The current of the battery cell 110 is collected by the twenty-four conductive components 130 which are conductive metal wires. Of course, in other embodiments of the present application, the battery cell 110 may also use other numbers of conductive components 130 which are conductive metal wires to collect current.

[0116] Referring to FIG. 4 , FIG. 7 and FIG. 8 , in one embodiment, the conductive component 130 includes a conductive substrate 133 and a metal coating 134, and the metal coating 134 is coated on the outer side of the conductive substrate 133. The soldering portion 135 is coated on the metal coating 134 in the circumferential direction. In the welding area 131, the soldering portion 135 is coated on the outer side of the metal coating 134, and the conductive component 130 is welded to connect the metal coating 134 with the conductive area 111 through the soldering portion 135 in the welding area 131, and the conductive component 130 is in contact with the fixed glue point 121 through the metal coating 134 in the adhesive area 132.

[0117] After the conductive component 130 welds the metal coating 134 to the conductive area 111 of the battery cell 110 through the soldering portion 135 in the welding area 131, the metal coating 134 can achieve electrical connection between the conductive substrate 133 and the conductive area 111 of the battery cell 110, so that the conductive substrate 133 can collect the current generated by the battery cell 110.

[0118] Optionally, the conductive substrate 133 is usually a copper strip. Of course, in other embodiments of the present application, the conductive substrate 133 can also be other conductive materials with good conductivity. Optionally, the metal coating 134 includes but is not limited to multi-element solder composed of tin, lead, bismuth, silver, etc., and the melting point of the metal coating 134 can be from 140°C to 250°C.

[0119] In one embodiment, the fixed glue point 121 is formed by glue that can be catalytically cured by curing conditions. To prevent the acidic components in the soldering part 135 from inhibiting the activity of the catalytic components in the fixed glue point 121 , the present application does not set the soldering part 135 in the adhesive area 132 .

[0120] In one embodiment, the curing conditions of the fixed glue dots 121 may be light, heat or other types of catalytic conditions. In other words, the fixed glue dots 121 may be cured by light curing, heat curing or other curing methods.

[0121] It is worth noting that the shape of the fixed glue point 121 is not limited in principle, as long as the fixed glue point 121 can bond and connect the adhesive area 132 of the conductive component 130 and the battery cell 110. Optionally, the shape of the fixed glue point 121 is hemispherical, square, straight line splicing type, curved line splicing type, straight line and curved line splicing type or other shapes.

[0122] 3, the shape of the fixed glue point 121 is hemispherical, that is, the outer contour of the fixed glue point 121 is semicircular. Of course, in other embodiments of the present application, the fixed glue point 121 can also be square or other regular or irregular shapes.

[0123] In one embodiment, the shapes of the fixed glue points 121 are the same and / or different. Optionally, the shapes of the fixed glue points 121 are the same; optionally, the shapes of the fixed glue points 121 are different; optionally, some of the fixed glue points 121 are the same, and some of the fixed glue points 121 are different. It is worth noting that the shape of the fixed glue points 121 is not limited in principle, as long as the fixed glue points 121 can bond and connect the conductive component 130 and the battery cell 110.

[0124] In the solar cell string 100 of the present application, a plurality of welding areas 131 and a plurality of adhesive areas 132 are arranged on the periphery of the conductive component 130, and the plurality of welding areas 131 and the plurality of adhesive areas 132 are staggered along a first direction. The conductive component 130 has a soldering portion 135 in the welding area 131, and has no soldering portion 135 in the adhesive area 132. In this way, the welding area 131 of the conductive component 130 and the soldering portion 135 thereon can correspond to the conductive area 111 of the battery cell 110, and the adhesive area 132 of the conductive component 130 can correspond to the fixed glue point 121.

[0125] After the conductive component 130 is fixed to the battery cell 110, the soldering portion 135 helps the conductive component 130 to be welded and fixed to the battery cell 110 in the welding area 131, thereby increasing the firmness of the connection between the conductive component 130 and the battery cell 110. At the same time, the soldering portion 135 of the conductive component 130 will not contact the fixed glue point 121, thereby increasing the bonding force between the conductive component 130 and the fixed glue point 121, ensuring the reliability of the bonding connection between the conductive component 130 and the battery cell 110, and further ensuring that there is sufficient tension between the conductive component 130 and the battery cell 110, thereby ensuring the reliability of the connection between the conductive component 130 and the battery cell 110, avoiding the problem of poor solder joints between the conductive component 130 and the battery cell 110, and ensuring the performance of the photovoltaic module.

[0126] Referring to Figures 1, 2, 5 and 6, the present application also provides a photovoltaic module, including a plurality of solar cell strings 100, a cover plate and a back plate, wherein the plurality of solar cell strings 100 are connected in series along a first direction, the cover plate and the back plate are arranged on both sides of the solar cell string 100, and the cover plate, the back plate and the solar cell string 100 are packaged using a packaging process.

[0127] When the solar cell string 100 of the above embodiment is used to prepare a photovoltaic module, the reliability of the connection between the conductive component 130 and the cell 110 is ensured, and the problem of poor solder joint between the conductive component 130 and the cell 110 is avoided, so as to ensure the performance of the photovoltaic module. At the same time, the light shielding of the conductive component 130 can be reduced, the efficiency of the photovoltaic module can be improved, and the solar cell string 100 can be encapsulated with a thinner encapsulation film, thereby reducing the manufacturing cost.

[0128] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0129] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A conductive component, characterized in that: The outer periphery of the conductive component (130) has a plurality of welding areas (131) and a plurality of adhesive areas (132), and the plurality of welding areas (131) and the plurality of adhesive areas (132) are arranged alternately along a first direction; The outer periphery of the conductive component (130) further comprises a plurality of soldering portions (135), the plurality of soldering portions (135) respectively corresponding to the plurality of welding areas (131), and each of the soldering portions (135) at least partially covers the conductive component (130) along the circumference of the conductive component (130) in the welding area (131).

2. The conductive component according to claim 1, characterized in that: Along the first direction, the welding area (131) is located at the end of the conductive component (130), so that the soldering portion (135) is located at the end of the conductive component (130); Alternatively, along the first direction, the adhesive area (132) is located at an end of the conductive component (130).

3. The conductive component according to claim 1, characterized in that: The length of the welding area (131) along the first direction is the same as and / or different from the length of the adhesive area (132) along the first direction; And / or, the lengths of the welding areas (131) along the first direction are the same and / or different; And / or, the lengths of the adhesive areas (132) along the first direction are the same and / or different.

4. The conductive component according to claim 1, characterized in that: The length of the welding area (131) along the first direction is greater than the length of the adhesive area (132) along the first direction.

5. The conductive component according to claim 1, characterized in that: The conductive component (130) is a conductive metal wire or a conductive metal strip; The diameter of the conductive component (130) is 0.1 mm to 0.3 mm; or the longitudinal section of the conductive component (130) is an equilateral triangle, and the side length of the longitudinal section of the conductive component (130) is 0.1 mm to 0.3 mm.

6. The conductive component according to any one of claims 1 to 5, characterized in that: The conductive component (130) comprises a conductive substrate (133) and a metal coating (134), wherein the metal coating (134) is coated on the outside of the conductive substrate (133); The soldering portion (135) is circumferentially coated on the metal coating (134); Wherein, each of the soldering parts (135) is provided in a liquid state, or each of the soldering parts (135) is provided in a solid state.

7. A solar cell string, characterized in that: It comprises a battery cell (110), a bonding portion (120), and a conductive component (130) according to any one of claims 1 to 6; The bonding portion (120) comprises a plurality of fixed glue dots (121), the plurality of fixed glue dots (121) being arranged at intervals on the surface of the battery sheet (110) along a first direction, and the fixed glue dots (121) being arranged corresponding to the adhesive area (132) of the conductive component (130); The conductive component (130) is fixed to the surface of the battery cell (110) by welding in the welding area (131) through the soldering part (135), and the conductive component (130) is bonded and connected to the fixing glue point (121) in the adhesive area (132).

8. The solar cell string according to claim 7, characterized in that: The length of the soldering portion (135) along the first direction is less than or equal to the length of the welding area (131) along the first direction; And / or, the length of the fixed glue point (121) along the first direction is less than or equal to the length of the adhesive area (132) along the first direction.

9. The solar cell string according to claim 8, characterized in that: The number of the bonding parts (120) is plural, and the plural bonding parts (120) are arranged on the surface of the battery sheet (110) at intervals along a second direction perpendicular to the first direction; There are a plurality of the conductive components (130), each of the bonding portions (120) is connected to a conductive component (130), and each of the conductive components (130) is provided with a plurality of spaced soldering portions (135).

10. The solar cell string according to any one of claims 7 to 9, characterized in that: The surface of the battery cell (110) has a conductive area (111), a plurality of the conductive areas (111) are arranged on the surface of the battery cell (110) at intervals along the first direction, and the conductive areas (111) extend along a second direction perpendicular to the first direction; The conductive area (111) corresponds to the welding area (131), and the soldering part (135) solders the conductive component (130) to the conductive area (111) of the battery cell (110) at the welding area (131); The fixed glue point (121) is arranged between two adjacent conductive areas (111).

11. The solar cell string according to claim 10, characterized in that: The battery cell (110) has a plurality of conductive layers (112), each conductive area (111) is provided with at least one conductive layer (112), and the conductive layer (112) extends along the second direction; When at least two conductive layers (112) are arranged in the conductive area (111), the at least two conductive layers (112) are arranged at intervals along the first direction.

12. A photovoltaic module, characterized in that: It comprises a cover plate, a back plate and a plurality of solar cell strings (100) according to any one of claims 7 to 11, wherein the plurality of solar cell strings (100) are connected in series along a first direction; The cover plate and the back plate are arranged on both sides of the solar cell string (100), and the cover plate, the back plate and the solar cell string (100) are packaged using a packaging process.

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