Solar cell module

Abstract

The utility model discloses a solar cell module, which comprises a plurality of cell pieces arranged along a first direction to form cell strings, adjacent cell pieces in the same cell string are electrically connected through a connecting conductive piece, the solar cell module also comprises a confluence conductive piece arranged along a second direction, and the confluence conductive piece is electrically connected with the connecting conductive piece. A connecting strip is arranged at the side part of the confluence conductive piece, the connecting strip extends out of the side part of the confluence conductive piece and can be electrically connected with the connecting conductive piece of the same-polarity electrode, the connecting conductive piece is used for collecting current in the connecting conductive piece, and the connecting conductive piece is arranged on the back surface of the battery piece. The connecting conductive piece comprises a plurality of first electrode conductive pieces and second electrode conductive pieces. According to the utility model, the insulating strip does not need to be cut or punched, so that the working procedures and time consumption are reduced, the automatic placement precision requirement is reduced, the mass production efficiency is high, and the problems of insufficient soldering, unsoldering, short circuit and the like are not easy to occur.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a solar cell assembly. Background Art

[0002] A solar cell module usually includes multiple cells. The current generated by the cells is collected through connecting conductive parts. In order to further collect the current of the connecting conductive parts, a busbar conductive part is usually set between the cells to electrically connect the busbar conductive part to the connecting conductive part. When making photovoltaic modules, existing manufacturers first weld the connecting conductive parts on the cell, and then isolate the opposite-sex electrodes with small insulating blocks to prevent the subsequently welded busbar conductive parts from contacting the opposite-sex electrodes, or make holes in the insulating strips to allow the subsequently welded busbar conductive parts to contact the same-sex electrodes. However, this method requires cutting the insulating strips into small blocks first, which is prone to cold solder joints and desoldering after welding, or requires precise drilling of holes in the insulating strips, which places high demands on the manufacturing process. It is easy to cause problems such as short circuit failures due to deviations in the holes, thereby endangering the safety and reliability of the modules. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a solar cell assembly that does not require cutting insulating strips or drilling holes in the insulating strips, thereby reducing the number of steps and time consumption, lowering the requirements for automated placement accuracy, achieving high mass production efficiency, and being less prone to problems such as cold solder joints, desoldering, and short circuits.

[0004] In order to solve the above technical problems, the utility model provides a solar cell assembly, comprising a plurality of cell sheets, wherein the cell sheets are arranged along a first direction to form a cell string, and in the same cell string, adjacent cell sheets are electrically connected by connecting conductive members, and the connecting conductive members are arranged along the first direction.

[0005] It also includes a bus conductor, which is arranged along the second direction. A connecting bar is provided on the side of the bus conductor. The connecting bar extends from the side of the bus conductor and can be electrically connected to the connecting conductor of the same electrode. The connecting conductor is used to collect current in the connecting conductor.

[0006] The first direction and the second direction are arranged to intersect each other.

[0007] As an improvement to the above solution, there are multiple connecting bars, which are arranged at intervals along the length direction of the bus conductor, and the length direction of the connecting bars is parallel to the first direction.

[0008] As an improvement to the above solution, the connecting conductive member is arranged on the back side of the battery cell, and the connecting conductive member includes a plurality of first electrode conductive members and a second electrode conductive member, the first electrode conductive members and the second electrode conductive members are alternately arranged along the second direction, and a plurality of the first electrode conductive members are electrically connected to the connecting bar or a plurality of the second electrode conductive members are electrically connected to the connecting bar.

[0009] As an improvement to the above solution, the busbar conductive member is arranged at the edge of the battery string, and the edge of the battery string is provided with an edge battery cell. The connecting strip extends toward the side where the edge battery cell is located and is connected to the first electrode conductive member or the second electrode conductive member of the battery cell.

[0010] As an improvement to the above solution, the orthographic projection of the busbar conductive member at least partially overlaps with the orthographic projection of the edge cell.

[0011] As an improvement to the above solution, the edge battery cell is provided with a first edge, the bus conductor is located on the outside of the first edge, the first electrode conductor or the second electrode conductor extends from the first edge and is electrically connected to the connecting bar, or the connecting bar extends into the inside of the first edge and is electrically connected to the first electrode conductor or the second electrode conductor.

[0012] As an improvement to the above solution, the bus conductor is arranged between adjacent battery strings, the connecting strips are arranged on both sides of the bus conductor and extend toward the battery strings on both sides, and the connecting strips are respectively connected to the first electrode conductive members or the second electrode conductive members of two adjacent battery strings.

[0013] As an improvement to the above solution, the connecting conductive member and the busbar conductive member are both provided on the back side of the battery cell, and an insulating member is provided between the busbar conductive member and the back side of the battery cell.

[0014] As an improvement to the above-mentioned solution, when multiple first electrode conductive members are electrically connected to the connecting bar, the insulating member is arranged between the second electrode conductive member and the bus conductive member; when multiple second electrode conductive members are electrically connected to the connecting bar, the insulating member is arranged between the first electrode conductive member and the bus conductive member.

[0015] As an improvement to the above solution, the length of the connecting strip is smaller than the width of the insulating member. When a plurality of the first electrode conductive members are electrically connected to the connecting strip, the first electrode conductive members abut against a side of the insulating member away from the back of the battery cell and are connected to the connecting strip, and the second electrode conductive member is located between the back of the battery cell and the insulating member.

[0016] When multiple second electrode conductive members are electrically connected to the connecting bar, the second electrode conductive members abut against the side of the insulating member away from the back of the battery cell and are connected to the connecting bar, and the first electrode conductive members are located between the back of the battery cell and the insulating member.

[0017] As an improvement to the above solution, the length of the connecting strip is not less than the width of the insulating member, and when the plurality of first electrode conductive members are directly electrically connected to the ends of the connecting strip, the second electrode conductive member is located between the back surface of the battery cell and the insulating member;

[0018] When the plurality of second electrode conductive members are directly electrically connected to the ends of the connecting bars, the first electrode conductive member is located between the back surface of the battery cell and the insulating member.

[0019] As an improvement to the above solution, the busbar conductive member and the connecting bar are integrated.

[0020] The implementation of this utility model has the following beneficial effects:

[0021] The solar cell assembly of the present invention is provided with a busbar conductor. Unlike conventional busbar conductors, the busbar conductor of the present invention is provided with a connecting strip on the side thereof. The connecting strip extends from the side thereof and can be electrically connected to the connecting strip of the like-pole electrode. In this way, the connecting strip can cross the insulating member to connect to the connecting strip of the like-pole electrode, while the connecting strip is not provided at the position corresponding to the connecting strip of the opposite-pole electrode, so that the busbar conductor does not contact the connecting strip of the opposite-pole electrode, thereby forming an isolation effect. During production, it is only necessary to weld the connecting strip, then place the insulating member and the busbar conductor, and weld the connecting strip to the connecting strip of the like-pole electrode to complete the connection. There is no need to cut or drill holes in the insulating member, thus reducing the number of processes, saving time, and lowering the requirements for the accuracy of automated placement. In addition, it can significantly reduce the occurrence of cold solder joints and desoldering. Using the connecting strip for welding is also less likely to cause electrode short circuits, thereby improving the safety and reliability of the assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of the utility model solar cell assembly;

[0023] Figure 2 This is a schematic structural diagram of the first embodiment of the solar cell assembly of the present utility model;

[0024] Figure 3 This is a schematic structural diagram of a second embodiment of a solar cell assembly of the present utility model;

[0025] Figure 4This is a schematic structural diagram of a third embodiment of a solar cell assembly of the present utility model;

[0026] Figure 5 This is a schematic structural diagram of a fourth embodiment of a solar cell assembly of the present utility model;

[0027] Figure 6 This is a schematic diagram of a partial cross-sectional structure of a fourth embodiment of a solar cell assembly of the present utility model;

[0028] Figure 7 This is a schematic structural diagram of a fifth embodiment of a solar cell assembly of the present utility model;

[0029] Figure 8 It is a partial cross-sectional structural diagram of the fifth embodiment of the solar cell assembly of the present utility model. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that any directional terms such as "up," "down," "left," "right," "front," "back," "inside," and "outside" that appear or will appear in this document are based solely on the accompanying drawings and are not intended to limit the present invention.

[0031] See also Figure 1The embodiment of the present utility model discloses a solar cell assembly, comprising a plurality of cells 41, wherein the cells 41 are arranged along a first direction to form a cell string 4, wherein adjacent cells 41 in the same cell string 4 are electrically connected via a connecting conductive member 1, wherein the connecting conductive member 1 can be connected in series or in parallel, wherein the connecting conductive member 1 is arranged along the first direction. The connecting conductive member 1 includes two polarities, corresponding to the positive and negative polarities. The solar cell assembly also includes a bus conductor 2, wherein the bus conductor 2 is capable of collecting the current in the connecting conductive member 1, wherein the bus conductor 2 also includes two polarities, which are respectively connected to the connecting conductive members 1 of the two polarities, wherein the bus conductor 2 of the positive pole collects the current from the connecting conductive member 1 of the same electrode (positive pole) and isolates it from the connecting conductive member 1 of the opposite electrode (negative pole), and the bus conductor 2 of the negative pole collects the current from the connecting conductive member 1 of the same electrode (negative pole) and isolates it from the connecting conductive member 1 of the opposite electrode (positive pole). The bus conductor 2 is arranged along the second direction. In the embodiment of the present utility model, the first direction and the second direction are arranged crosswise, so that the end of the connecting conductive member 1 of the like-pole electrode can overlap the bus conductor 2. In the traditional battery assembly, the connecting conductive member 1 of the like-pole electrode will directly overlap the main body of the bus conductor 2. However, the present invention is different from the traditional overlapping structure in that the side of the bus conductor 2 is provided with a connecting bar 3, and the connecting bar 3 extends from the side of the bus conductor 2. The bus conductor 2 and the connecting bar 3 form a "cross" or "T" shape, wherein the connecting bar 3 extending from the side of the bus conductor 2 can be electrically connected to the connecting conductive member 1 of the like-pole electrode, while the connecting bar 3 is not provided at the corresponding position of the connecting conductive member 1 of the opposite-pole electrode, so that the bus conductor 2 only contacts with the connecting conductive member 1 of the like-pole electrode to form an electrical connection, and does not contact with the connecting conductive member 1 of the opposite-pole electrode, forming an isolation effect.

[0032] The beneficial effects of the embodiments of the present utility model are as follows:

[0033] The solar cell assembly of the embodiment of the present utility model is provided with a bus conductor 2. Unlike the traditional bus conductor 2, the side of the bus conductor 2 of the present utility model is provided with a connecting bar 3. The connecting bar 3 extends from the side of the bus conductor 2 and can be electrically connected to the connecting conductor 1. In this way, the connecting bar 3 can cross the insulating part 5 to connect with the connecting conductor 1 of the same electrode, while the connecting bar 3 is not provided at the position corresponding to the connecting conductor 1 of the opposite electrode, so that the bus conductor 2 does not contact the connecting conductor 1 of the opposite electrode, forming an isolation effect. During production, it is only necessary to weld the connecting conductor 1, then place the insulating part 5 and the bus conductor 2, and weld the connecting bar 3 to the connecting conductor 1 of the same electrode to complete the connection. There is no need to cut or open a hole in the insulating part 5, which reduces the process, saves time, and reduces the accuracy requirements of automated placement. It can also greatly reduce the occurrence of cold solder joints and desoldering. Using the connecting bar 3 for welding is not prone to electrode short circuits, thereby improving the safety and reliability of the assembly.

[0034] There are multiple connecting bars 3 and they are spaced apart along the length of the busbar conductive member 2. The length of each connecting bar 3 is parallel to the first direction, that is, perpendicular to the length of the busbar conductive member 2. The connecting bars 3 are spaced apart to correspond to the positions of the connecting conductive members 1 of the same-pole electrodes, while the vacant positions of adjacent connecting bars 3 correspond to the positions of the connecting conductive members 1 of the opposite-pole electrodes. This ensures that the connecting bars 3 and the busbar conductive member 2 do not contact the connecting conductive members 1 of the opposite-pole electrodes.

[0035] Specifically, see Figure 1 The connecting conductive member 1 is provided on the back side of the battery cell 41, and the connecting conductive member 1 includes a plurality of first electrode conductive members 11 and a second electrode conductive member 12, which correspond to two electrodes respectively, wherein the first electrode conductive members 11 and the second electrode conductive members 12 are alternately arranged along the second direction, and can correspond to the positions of the connecting bars 3 and the positions of the gaps between adjacent connecting bars 3 respectively, and a plurality of the first electrode conductive members 11 are electrically connected to the connecting bars 3 or a plurality of the second electrode conductive members 12 are electrically connected to the connecting bars 3, thereby forming an electrical connection between the like-pole electrodes and isolation between the opposite-pole electrodes.

[0036] See also Figure 2In the first embodiment, the bus conductor 2 is provided at the edge of the battery string 4, and the edge of the battery string 4 is provided with an edge battery cell 421. The connecting bar 3 extends toward the side where the edge battery cell 421 is located and is connected to the first electrode conductive member 11 or the second electrode conductive member 12 of the battery cell 41, specifically connected to the connecting conductive member 1 of the same electrode. At this time, the connecting bars 3 are all located on the same side of the bus conductor 2, and the connecting bar 3 and the bus conductor 2 form a "T" shape.

[0037] In the first embodiment, the orthographic projection of the bus conductor 2 at least partially overlaps with the orthographic projection of the edge battery cell 421. At this time, the bus conductor 2 is located on the back of the battery cell 41 and can be hidden and blocked by the battery cell 41. The battery cell 41 can simultaneously block the bus conductor 2 and the connecting strip 3, thereby improving the integrity and aesthetics of the appearance of the battery assembly.

[0038] See also Figure 3 The present invention also discloses a second embodiment. Unlike the first embodiment, the edge cell 421 has a first edge 421, and the busbar conductor 2 is located outside the first edge 421. That is, the edge cell 421 does not block the busbar conductor 2. The first electrode conductor 11 or the second electrode conductor 12 extends beyond the first edge 421 to electrically connect with the connecting bar 3. In other embodiments, the length of the first electrode conductor 11 or the second electrode conductor 12 can be shortened to allow the connecting bar 3 to extend inside the first edge 421 and electrically connect with the first electrode conductor 11 or the second electrode conductor 12. This can reduce the size of the gap at the edge of the battery string 4.

[0039] See also Figure 4 In the third embodiment, a gap is provided between adjacent battery strings 4, the bus conductor 2 is provided in the gap between adjacent battery strings 4, and the connecting bar 3 is provided on both sides of the bus conductor 2 and extends toward the battery strings 4 on both sides. The connecting bar 3 is located on both sides of the bus conductor 2, and the connecting bar 3 and the bus conductor 2 form a "cross" shape. The connecting bar 3 is respectively connected to the first electrode conductive members 11 or the second electrode conductive members 12 of two adjacent battery strings 4.

[0040] See also Figure 5 and Figure 6In the fourth embodiment, the connecting conductive member 1 and the bus conductive member 2 are both arranged on the back of the battery cell 41. The battery cell 41 can shield the bus conductive member 2 and the connecting bar 3. At the same time, in order to prevent the bus conductive member 2 from short-circuiting with the back of the battery cell 41, an insulating member 5 is provided between the bus conductive member 2 and the back of the battery cell 41. The insulating member 5 can provide insulating isolation.

[0041] In the fourth embodiment, when multiple first electrode conductive members 11 are electrically connected to the connecting bar 3, the second electrode conductive member 12 passes through the side of the insulating member 5 close to the battery cell 41, and the bus conductive member 2 is located on the side of the insulating member 5 away from the battery cell 41. The insulating member 5 can be arranged between the second electrode conductive member 12 and the bus conductive member 2, thereby isolating the bus conductive member 2 from the second electrode conductive member 12; when multiple second electrode conductive members 12 are electrically connected to the connecting bar 3, the insulating member 5 is arranged between the first electrode conductive member 11 and the bus conductive member 2, the first electrode conductive member 11 passes through the side of the insulating member 5 close to the battery cell 41, and the bus conductive member 2 is located on the side of the insulating member 5 away from the battery cell 41. The insulating member can be arranged between the first electrode conductive member 11 and the bus conductive member 2, thereby isolating the bus conductive member 2 from the first electrode conductive member 11.

[0042] See also Figure 6 In the fourth embodiment, the length of the connecting bar 3 is less than the width of the insulating member 5, and the connecting bar 3 cannot extend outside the insulating member 5. When multiple first electrode conductive members 11 are electrically connected to the connecting bar 3, the first electrode conductive members 11 abut against the side of the insulating member 5 away from the back of the battery cell 41 and are connected to the connecting bar 3, while the second electrode conductive members 12 are located between the back of the battery cell 41 and the insulating member 5. When multiple second electrode conductive members 12 are electrically connected to the connecting bar 3, the second electrode conductive members 12 abut against the side of the insulating member 5 away from the back of the battery cell 41 and are connected to the connecting bar 3, while the first electrode conductive members 11 are located between the back of the battery cell 41 and the insulating member 5. This ensures that the length of the connecting conductive member 1 is sufficiently long to fully collect the current from the battery cell 41.

[0043] See also Figure 7 and Figure 8The present invention also discloses a fifth embodiment based on the fourth embodiment. Unlike the fourth embodiment, the length of the connecting bar 3 is not less than the width of the insulating member 5. In practice, the length of the connecting bar 3 can be lengthened so that multiple first electrode conductive members 11 are directly electrically connected to the end of the connecting bar 3. The first electrode conductive members 11 do not need to be placed on the surface of the insulating member 5. The second electrode conductive members 12 are located between the back surface of the battery cell 41 and the insulating member 5 to form insulation. Alternatively, multiple second electrode conductive members 12 can be directly electrically connected to the end of the connecting bar 3, and the first electrode conductive members 11 are located between the back surface of the battery cell 41 and the insulating member 5 to form insulation. In this way, the connecting conductive member 1 can be located on a flush surface and welded to the connecting bar 3, which is less likely to cause cold solder joints or desoldering, and has a good insulation effect.

[0044] In the present invention, the bus conductor 2 and the connecting bar 3 are integrated into one, so that during production, the bus conductor 2 and the connecting bar 3 can be directly placed on the back of the battery cell 41 or the insulating member 5 to form a whole. There is no need for precise alignment, and the placement steps are reduced, thereby reducing the difficulty of production. Moreover, the integrated design can improve the overall strength of the bus conductor 2 and the connecting bar 3, further reducing the occurrence of cold solder joints, desoldering, and short circuits.

[0045] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A solar cell module, characterized in that: The battery cell comprises a plurality of battery cells, the battery cells are arranged along a first direction to form a battery string, and in the same battery string, adjacent battery cells are electrically connected by a connecting conductive member, and the connecting conductive member is arranged along the first direction; The device further comprises a busbar conductive member, the busbar conductive member being arranged along the second direction, the side of the busbar conductive member being provided with a connecting bar, the connecting bar extending from the side of the busbar conductive member and being electrically connected to the connecting conductive member of the same electrode, the connecting conductive member being used to collect current in the connecting conductive member; The first direction and the second direction are arranged to intersect each other.

2. The solar cell assembly according to claim 1, wherein There are a plurality of connecting bars, which are arranged at intervals along the length direction of the bus conductor, and the length direction of the connecting bars is parallel to the first direction.

3. The solar cell assembly according to claim 1, wherein The connecting conductive member is provided on the back side of the battery cell, and includes a plurality of first electrode conductive members and a second electrode conductive member. The first electrode conductive members and the second electrode conductive members are alternately arranged along the second direction, and the plurality of first electrode conductive members are electrically connected to the connecting bar or the plurality of second electrode conductive members are electrically connected to the connecting bar.

4. The solar cell assembly according to claim 3, characterized in that The busbar conductor is provided at the edge of the battery string, and an edge battery sheet is provided at the edge of the battery string. The connecting bar extends toward the side where the edge battery sheet is located and is connected to the first electrode conductor or the second electrode conductor of the battery sheet.

5. The solar cell assembly according to claim 4, characterized in that The orthographic projection of the busbar conductor at least partially overlaps with the orthographic projection of the edge cell.

6. The solar cell assembly according to claim 4, characterized in that The edge battery cell is provided with a first edge, the bus conductor is located on the outside of the first edge, the first electrode conductor or the second electrode conductor extends from the first edge and is electrically connected to the connecting bar, or the connecting bar extends into the inside of the first edge and is electrically connected to the first electrode conductor or the second electrode conductor.

7. The solar cell assembly according to claim 3, characterized in that The busbar conductive member is provided between adjacent battery strings, the connecting bars are provided on both sides of the busbar conductive member and extend toward the battery strings on both sides, and the connecting bars are respectively connected to the first electrode conductive members or the second electrode conductive members of two adjacent battery strings.

8. The solar cell assembly according to claim 3, wherein: The connecting conductive member and the busbar conductive member are both arranged on the back side of the battery cell, and an insulating member is arranged between the busbar conductive member and the back side of the battery cell.

9. The solar cell assembly according to claim 8, characterized in that When multiple first electrode conductive members are electrically connected to the connecting bar, the insulating member is arranged between the second electrode conductive member and the bus conductive member; when multiple second electrode conductive members are electrically connected to the connecting bar, the insulating member is arranged between the first electrode conductive member and the bus conductive member.

10. The solar cell assembly according to claim 9, characterized in that The length of the connecting strip is smaller than the width of the insulating member. When the plurality of first electrode conductive members are electrically connected to the connecting strip, the first electrode conductive members abut against a side of the insulating member away from the back surface of the battery cell and are connected to the connecting strip, and the second electrode conductive members are located between the back surface of the battery cell and the insulating member. When multiple second electrode conductive members are electrically connected to the connecting bar, the second electrode conductive members abut against the side of the insulating member away from the back of the battery cell and are connected to the connecting bar, and the first electrode conductive members are located between the back of the battery cell and the insulating member.

11. The solar cell assembly according to claim 9, wherein The length of the connecting strip is not less than the width of the insulating member. When the plurality of first electrode conductive members are directly electrically connected to the ends of the connecting strip, the second electrode conductive member is located between the back surface of the battery cell and the insulating member. When the plurality of second electrode conductive members are directly electrically connected to the ends of the connecting bars, the first electrode conductive member is located between the back surface of the battery cell and the insulating member.

12. The solar cell assembly according to claim 1, wherein The busbar conductive member is integrated with the connecting bar.

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