Battery string, photovoltaic module and photovoltaic power generation system

Abstract

The utility model discloses a battery string, a photovoltaic assembly and a photovoltaic power generation system, comprising a plurality of battery pieces, a plurality of first interconnection structural members and a plurality of second interconnection structural members, a first grid line comprises a plurality of first grid line segments arranged at intervals along a second direction, and a second grid line comprises a plurality of second grid line segments arranged at intervals along a second direction. Every two adjacent first grid line segments, adjacent to the first edge grid line, of the multiple first grid lines are connected with each other to form a first diversion grid line, the second grid lines comprise multiple second grid line segments arranged at intervals in the second direction, and every two adjacent second grid line segments, adjacent to the second edge grid line, of the multiple second grid lines are connected with each other to form a second diversion grid line; the second interconnection structural member adjacent to the first edge grid line is electrically connected with the first diversion grid line, and the first interconnection structural member adjacent to the second edge grid line is electrically connected with the second diversion grid line. According to the battery piece provided by the utility model, the series connection of a plurality of battery pieces is facilitated, so that the normal use of a battery string is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, and in particular to a battery string, a photovoltaic module and a photovoltaic power generation system. Background Art

[0002] A back-contact solar cell is a cell in which both the emitter and base contact electrodes are placed on the back surface (non-light-receiving surface) of the cell, and there is no metal electrode shielding on the light-receiving surface of the cell. In related technologies, the cell has a main grid line design, which consumes a large amount of silver and has a high production cost. For a cell without a main grid, it is important to ensure that the current of multiple sub-grid lines can be smoothly led out to facilitate the connection of multiple cells into a battery string. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the utility model is to provide a battery string. By arranging a first current-carrying grid line and a second current-carrying grid line, it is beneficial to the series connection of multiple cells, so as to facilitate the normal use of the battery string.

[0004] Another object of the utility model is to provide a photovoltaic module adopting the above battery string.

[0005] Still another object of the utility model is to provide a photovoltaic power generation system adopting the above battery string or photovoltaic module.

[0006] A battery string according to an embodiment of the first aspect of the present utility model includes: a plurality of battery cells, on one side surface of the battery cell, a first edge grid line, a second edge grid line, a plurality of first grid lines and a plurality of second grid lines are provided, the first edge grid line and the second edge grid line extend along a first direction, the first edge grid line and the second edge grid line are respectively provided on both sides of the battery cell along a second direction, the plurality of first grid lines and the plurality of second grid lines are alternately and spacedly arranged along the first direction, the polarities of the first grid line and the second grid line are opposite, one ends of the plurality of first grid lines are all connected to the first edge grid line, the other ends of the plurality of first grid lines are all spaced apart from the second edge grid line, one ends of the plurality of second grid lines are all spaced apart from the first edge grid line, the other ends of the plurality of second grid lines are all connected to the second edge grid line, the first grid line includes a plurality of first grid line segments spacedly arranged along the second direction, two adjacent first grid line segments among the plurality of first grid lines adjacent to the first edge grid line are connected to each other to form a first current guiding grid line, the second grid line includes a plurality of second grid line segments spacedly arranged along the second direction, two adjacent second grid line segments among the plurality of second grid lines adjacent to the second edge grid line are connected to each other to form a second current guiding grid line; a plurality of first interconnecting members and a plurality of second interconnecting members, the plurality of battery cells are electrically connected through the plurality of first interconnecting members and the plurality of second interconnecting members, the plurality of first interconnecting members and the plurality of second interconnecting members are alternately and spacedly arranged along the second direction, the first interconnecting member is provided between two adjacent first grid line segments of the plurality of first grid lines, and the first interconnecting member and the ends of the two adjacent first grid line segments are spaced apart from each other, the first interconnecting member is respectively electrically connected to the plurality of second grid lines, the second interconnecting member is provided between two adjacent second grid line segments of the plurality of second grid lines, and the second interconnecting member and the ends of the two adjacent second grid line segments are spaced apart from each other, the second interconnecting member is respectively electrically connected to the plurality of first grid lines, the second interconnecting member adjacent to the first edge grid line is electrically connected to the first current guiding grid line, and the first interconnecting member adjacent to the second edge grid line is electrically connected to the second current guiding grid line.

[0007] According to the battery string of the embodiment of the present utility model, by arranging the second interconnecting structure adjacent to the first edge grid line to be electrically connected to the first current guiding grid line, and the first interconnecting structure adjacent to the second edge grid line to be electrically connected to the second current guiding grid line, the second interconnecting structure adjacent to the first edge grid line can collect the current converted on the corresponding plurality of first grid segments. At the same time, the current of the plurality of first grid segments connected to the first edge grid line can be collected to the first current guiding grid line through the first edge grid line, and then be guided to the above-mentioned second interconnecting structure through the first current guiding grid line, which is beneficial to the normal use of the battery string. Similarly, the first interconnecting structure adjacent to the second edge grid line can collect the current converted on the corresponding plurality of second grid segments. At the same time, the current of the plurality of second grid segments connected to the second edge grid line can be collected to the second current guiding grid line through the second edge grid line, and then be guided to the above-mentioned first interconnecting structure through the second current guiding grid line, which is beneficial to the electrical connection between the plurality of battery cells, and thus beneficial to the smooth export of the current on the battery cells, which is beneficial to the normal use of the battery string.

[0008] According to some embodiments of the present utility model, the plurality of the first interconnecting structures include a first edge interconnecting structure and a plurality of first intermediate interconnecting structures. The first edge interconnecting structure is located between the first edge grid line and the plurality of first intermediate interconnecting structures, and a first insulating connecting member is provided between the first edge interconnecting structure and the first current guiding grid line; the plurality of the second interconnecting structures include a second edge interconnecting structure and a plurality of second intermediate interconnecting structures. The second edge interconnecting structure is located between the second edge grid line and the plurality of second intermediate interconnecting structures, and a second insulating connecting member is provided between the second edge interconnecting structure and the second current guiding grid line.

[0009] According to some embodiments of the present utility model, the first insulating connecting member is insulating glue; and / or, the second insulating connecting member is insulating glue.

[0010] According to some embodiments of the present utility model, first connection strengthening members are respectively provided between the first edge interconnecting structure and two of the second grid segments adjacent to the first current guiding grid line; and / or, second connection strengthening members are respectively provided between each second edge interconnecting structure and two of the first grid segments adjacent to the second current guiding grid line.

[0011] According to some embodiments of the present utility model, at least two first bonding members are provided on the side of each first interconnecting structure away from the battery cell; at least two second bonding members are provided on the side of each second interconnecting structure away from the battery cell.

[0012] According to some embodiments of the present utility model, at least two of the first bonding members are respectively disposed on the two outermost ones of the plurality of first grid lines and the plurality of second grid lines along the first direction; at least two of the second bonding members are respectively disposed on the two outermost ones of the plurality of first grid lines and the plurality of second grid lines along the first direction.

[0013] According to some embodiments of the present utility model, the first bonding member and the second bonding member are respectively adhesive.

[0014] According to some embodiments of the present utility model, the battery string further includes: a positioning member, and the positioning member is disposed on a side of the plurality of first interconnecting structural members and the plurality of second interconnecting structural members away from the battery cell.

[0015] According to some embodiments of the present utility model, the positioning member is a glue dot, a glue strip or a glue film.

[0016] According to some embodiments of the present utility model, third insulating connecting members are respectively disposed on one ends of the plurality of first grid line segments close to the first interconnecting structural members, and insulation is provided between the first diversion grid line and the corresponding first interconnecting structural member through a fourth insulating connecting member; and / or, fifth insulating connecting members are respectively disposed on one ends of the plurality of second grid line segments close to the second interconnecting structural members, and insulation is provided between the second diversion grid line and the corresponding second interconnecting structural member through a sixth insulating connecting member.

[0017] According to some embodiments of the present utility model, third connection strengthening members are respectively disposed between the plurality of first grid line segments and the corresponding second interconnecting structural members, and fourth connection strengthening members are respectively disposed between the plurality of second grid line segments and the corresponding first interconnecting structural members.

[0018] According to some embodiments of the present utility model, the first connection strengthening member and / or the second connection strengthening member is a solder paste member; the third connection strengthening member and / or the fourth connection strengthening member is a solder paste member.

[0019] According to some embodiments of the present utility model, there are a plurality of the first diversion grid lines, and the plurality of first diversion grid lines are arranged at intervals along the first direction, and the ratio of the distance between two adjacent first diversion grid lines to the distance between the first interconnecting structural member and the second interconnecting structural member is b 3 , wherein the b 3 satisfies: 0.5 ≤ b 3 ≤ 3; and / or, there are a plurality of the second diversion grid lines, and the plurality of second diversion grid lines are arranged at intervals along the first direction, and the ratio of the distance between two adjacent second diversion grid lines to the distance between the first interconnecting structural member and the second interconnecting structural member is b 4 , wherein the b4 Satisfy: 0.5 ≤ b 4 ≤ 3.

[0020] The photovoltaic module according to the second aspect embodiment of the present utility model includes the battery string according to the first aspect embodiment described above.

[0021] The photovoltaic power generation system according to the third aspect embodiment of the present utility model includes the battery string according to the first aspect embodiment described above, or the photovoltaic module according to the second aspect embodiment described above.

[0022] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0023] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0024] Figure 1 is a schematic diagram of a battery string according to an embodiment of the present utility model;

[0025] Figure 2 is a schematic diagram of a battery string according to another embodiment of the present utility model;

[0026] Figure 3 is a schematic diagram of a battery string according to still another embodiment of the present utility model;

[0027] Figure 4 is a schematic diagram of a battery cell of a battery string according to an embodiment of the present utility model;

[0028] Figure 5 is a schematic diagram of a battery cell of a battery string according to an embodiment of the present utility model, where insulating glue and solder paste parts are shown on the battery cell;

[0029] Figure 6 is a schematic diagram of a battery cell of a battery string according to still another embodiment of the present utility model.

[0030] Reference Signs:

[0031] 100, battery string;

[0032] 1, battery cell;

[0033] 2, first edge grid line; 3, second edge grid line;

[0034] 4, first grid line; 41, first grid line segment;

[0035] 411. First break opening; 412. Third insulating connector; 413. Third connection reinforcement member;

[0036] 42. First diversion grid line; 421. Fourth insulating connector;

[0037] 5. Second grid line; 51. Second grid line segment;

[0038] 511. Second break opening; 512. Fifth insulating connector; 513. Fourth connection reinforcement member;

[0039] 52. Second diversion grid line;

[0040] 61. First interconnecting structure member; 611. First edge interconnecting structure member;

[0041] 6111. First insulating connector; 612. First intermediate interconnecting structure member;

[0042] 62. Second interconnecting structure member; 621. Second edge interconnecting structure member;

[0043] 6211. Second insulating connector; 622. Second intermediate interconnecting structure member;

[0044] 7. First bonding member; 70. Second bonding member;

[0045] 8. First connection reinforcement member; 9. Second connection reinforcement member; 10. Positioning member. Detailed implementation mode

[0046] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Below, reference is made to Figures 1-6 Describe the battery string 100 according to the first aspect embodiment of the present invention. In the description of the present invention, the meaning of "a plurality of" is two or more.

[0047] The battery string 100 according to the first aspect embodiment of the present invention includes a plurality of battery cells 1, a plurality of first interconnecting structure members 61, and a plurality of second interconnecting structure members 62. In the description of the present invention, the meaning of "a plurality of" is two or more.

[0048] Specifically, a first edge grid line 2, a second edge grid line 3, a plurality of first grid lines 4, and a plurality of second grid lines 5 are provided on one side surface of the battery cell 1. The first edge grid line 2 and the second edge grid line 3 extend along a first direction (for example, Figure 1 the up and down direction in [])), and the first edge grid line 2 and the second edge grid line 3 are respectively provided on the battery cell 1 along a second direction (for example, Figure 1On both sides (in the left - right direction), a plurality of first grid lines 4 and a plurality of second grid lines 5 are alternately arranged at intervals along the first direction. The polarities of the first grid lines 4 and the second grid lines 5 are opposite. One end of the plurality of first grid lines 4 is connected to the first edge grid line 2, and the other end of the plurality of first grid lines 4 is spaced apart from the second edge grid line 3. One end of the plurality of second grid lines 5 is spaced apart from the first edge grid line 2, and the other end of the plurality of second grid lines 5 is connected to the second edge grid line 3.

[0049] For example, in Figure 1 and Figure 5 example, a plurality of first grid lines 4 and a plurality of second grid lines 5 are alternately arranged at intervals along the up - down direction. The first grid lines 4 and the second grid lines 5 both extend in the left - right direction. The first edge grid line 2 is located on the left side of the plurality of first grid lines 4, and the second edge grid line 3 is located on the right side of the plurality of first grid lines 4. The opposite polarities of the first grid lines 4 and the second grid lines 5 can be understood as: when the first grid line 4 is a positive - electrode grid line, the second grid line 5 is a negative - electrode grid line; when the first grid line 4 is a negative - electrode grid line, the second grid line 5 is a positive - electrode grid line. The plurality of first grid lines 4 and the second grid lines 5 are located between the first edge grid line 2 and the second edge grid line 3. The left ends of the first edge grid line 2 and the plurality of first grid lines 4 are respectively connected. The left ends of the first edge grid line 2 and the plurality of second grid lines 5 are both spaced apart. The right ends of the second edge grid line 3 and the plurality of first grid lines 4 are both spaced apart. The right ends of the plurality of second edge grid lines 3 and the plurality of second grid lines 5 are both connected.

[0050] Thus, the first edge grid line 2 can collect the current of the plurality of first grid lines 4 connected to the first edge grid line 2, and the second edge grid line 3 can collect the current of the plurality of second grid lines 5 connected to the second edge grid line 3. And the first edge grid line 2 is spaced apart from the left ends of the plurality of second grid lines 5, and the second edge grid line 3 is spaced apart from the right ends of the plurality of first grid lines 4, which can prevent the first edge grid line 2 from contacting the second grid line 5 and also prevent the second edge grid line 3 from contacting the plurality of first grid lines 4, thereby avoiding short - circuit of the battery cell 1, being beneficial to the normal use of the battery cell 1, and also being beneficial to the current derivation of the first grid lines 4 and the second grid lines 5.

[0051] Combined with Figure 1 、 Figure 4 and Figure 5 , the first grid line 4 includes a plurality of first grid line segments 41 arranged at intervals along the second direction. At least one of the plurality of first grid lines 4 has two adjacent first grid line segments 41 adjacent to the first edge grid line 2 connected to each other to form a first current - guiding grid line 42. The second grid line 5 includes a plurality of second grid line segments 51 arranged at intervals along the second direction. At least one of the plurality of second grid lines 5 has two adjacent second grid line segments 51 adjacent to the second edge grid line 3 connected to each other to form a second current - guiding grid line 52. The first direction and the second direction are perpendicular. For example, in Figure 1 、 Figure 4 andFigure 5 In the example, multiple first grid segments 41 are arranged at intervals in the left - right direction, and multiple second grid segments 51 are arranged at intervals in the left - right direction. At least one of the multiple first grid lines 4 has two adjacent first grid segments 41 adjacent to the first edge grid line 2 connected integrally. At least one of the multiple second grid lines 5 has two adjacent second grid segments 51 adjacent to the second edge grid line 3 connected integrally.

[0052] It should be noted that the number and arrangement of the first diversion grid lines 42 and the second diversion grid lines 52 can be specifically set according to the actual situation. Taking the first diversion grid lines 42 as an example, when the number of the first diversion grid lines 42 is multiple, the multiple first diversion grid lines 42 can be arranged at equal intervals in the first direction, and the number of the multiple first diversion grid lines 42 can be the same as or different from the number of the first grid lines 4. The principle of setting the number of the second diversion grid lines 52 is similar to that of setting the number of the first diversion grid lines 42.

[0053] Referring to Figure 1 , multiple battery cells 1 are electrically connected through multiple first interconnecting members 61 and multiple second interconnecting members 62. The multiple first interconnecting members 61 and the multiple second interconnecting members 62 are arranged alternately at intervals in the second direction. The first interconnecting member 61 is arranged between two adjacent first grid segments 41 of the multiple first grid lines 4, and the end of the first interconnecting member 61 is spaced apart from the ends of the two adjacent first grid segments 41. The first interconnecting member 61 is electrically connected to the multiple second grid lines 5 respectively. The second interconnecting member 62 is arranged between two adjacent second grid segments 51 of the multiple second grid lines 5, and the end of the second interconnecting member 62 is spaced apart from the ends of the two adjacent second grid segments 51. The second interconnecting member 62 is electrically connected to the multiple first grid lines 4 respectively.

[0054] For example, in Figure 1 's example, the multiple first interconnecting members 61 are respectively insulated and connected to the multiple first grid lines 4, the multiple first interconnecting members 61 are respectively spaced apart from the ends of the corresponding multiple first grid segments 41, the multiple first interconnecting members 61 are respectively electrically connected to the multiple second grid lines 5, the multiple second interconnecting members 62 are respectively insulated and connected to the multiple second grid lines 5, the multiple second interconnecting members 62 are respectively spaced apart from the ends of the corresponding multiple second grid segments 51, and the multiple second interconnecting members 62 are respectively electrically connected to the multiple first grid lines 4.

[0055] It should be noted that the connection relationship between each first interconnecting structural member 61 and each second interconnecting structural member 62 and the solar cell 1 is similar. For a first interconnecting structural member 61, a first interconnecting structural member 61 is electrically connected (e.g., welded) to a plurality of second grid segments 51 that are opposite to each other in the up-down direction, and is located between two adjacent first grid segments 41 and spaced apart from the two adjacent first grid segments 41 to achieve insulated connection with the first grid line 4. For a second interconnecting structural member 62, a second interconnecting structural member 62 is electrically connected (e.g., welded) to a plurality of first grid segments 41 that are opposite to each other in the up-down direction, and is located between two adjacent second grid segments 51 and spaced apart from the two adjacent second grid segments 51 to achieve insulated connection with the second grid line 5.

[0056] With such an arrangement, by providing a plurality of first grid segments 41 and second grid segments 51, insulated connection between the first grid line 4 and the first interconnecting structural member 61, and insulated connection between the second grid line 5 and the second interconnecting structural member 62 can be achieved, improving the reliability of use of the solar cell 1. And there is no need to use other structural members or insulating adhesives to achieve insulation, reducing the amount of insulating adhesive used, lowering costs, simplifying the structure of the solar cell 1, facilitating production and processing, and having a relatively low production cost. In addition, the material usage of the first grid line 4 and the second grid line 5 is reduced, thereby reducing the printing cost of the first grid line 4 and the second grid line 5, and further reducing the production cost of the solar cell 1. Additionally, by providing the first edge grid line 2 and the second edge grid line 3, the first edge grid line 2 is connected to a plurality of first grid segments 41 at the leftmost end of a plurality of first grid lines 4, and the first edge grid line 2 can collect the current on the plurality of first grid segments 41. The second edge grid line 3 is connected to a plurality of second grid segments 51 at the rightmost end of a plurality of second grid lines 5, and the second edge grid line 3 can collect the current on the plurality of second grid segments 51 to avoid current loss.

[0057] In addition, the first interconnecting structural member 61 can lead out the current of a plurality of second grid segments 51 that are opposite to each other in the first direction of the plurality of second grid lines 5, and the second interconnecting structural member 62 can lead out the current of a plurality of first grid segments 41 that are opposite to each other in the first direction of the plurality of first grid lines 4 to achieve electrical connection between a plurality of solar cells 1, thereby increasing the photoelectric conversion amount of the solar cell string 100. In addition, by providing a plurality of first grid segments 41 and a plurality of second grid segments 51, the free end portions of two adjacent first grid segments 41 are separated from the corresponding first interconnecting structural member 61, and the free end portions of two adjacent second grid segments 51 are separated from the corresponding second interconnecting structural member 62 to achieve insulated connection between the second interconnecting structural member 62 and the second grid line 5, simplifying the structure of the solar cell 1 and also facilitating the connection of a plurality of solar cells 1. Moreover, the material amount of the first grid line 4 and the second grid line 5, such as silver paste, can also be reduced.

[0058] Combined Figure 1, the second interconnecting structure member 62 adjacent to the first edge grid line 2 is electrically connected to the first diversion grid line 42, and the first interconnecting structure member 61 adjacent to the second edge grid line 3 is electrically connected to the second diversion grid line 52. For example, the second interconnecting structure members 62 among the plurality of second interconnecting structure members 62 that are adjacent to the first edge grid line 2 are respectively electrically connected to the corresponding plurality of first grid line segments 41 (that is, the plurality of first grid line segments 41 that are vertically opposite and adjacent to the first edge grid line 2) and the first diversion grid line 42. The first interconnecting structure members 61 among the plurality of first interconnecting structure members 61 that are adjacent to the second edge grid line 3 are respectively electrically connected to the corresponding plurality of second grid line segments 51 (that is, the plurality of second grid line segments 51 that are vertically opposite and adjacent to the second edge grid line 3) and the second diversion grid line 52.

[0059] With such an arrangement, the second interconnecting structure member 62 adjacent to the first edge grid line 2 can collect the current converted on the corresponding plurality of first grid line segments 41. At the same time, the current of the plurality of first grid line segments 41 connected to the first edge grid line 2 can be collected by the first edge grid line 2 and then gathered to the first diversion grid line 42, and then diverted to the above-mentioned second interconnecting structure member 62 through the first diversion grid line 42, which is beneficial to the normal use of the battery string 100. Similarly, the first interconnecting structure member 61 adjacent to the second edge grid line 3 can collect the current converted on the corresponding plurality of second grid line segments 51. At the same time, the current of the plurality of second grid line segments 51 connected to the second edge grid line 3 can be collected by the second edge grid line 3 and then gathered to the second diversion grid line 52, and then diverted to the above-mentioned first interconnecting structure member 61 through the second diversion grid line 52, which is beneficial to the electrical connection between the plurality of battery cells 1, thereby facilitating the smooth export of the current on the battery cell 1, which is beneficial to the normal use of the battery string 100.

[0060] For the battery string according to the embodiment of the present invention, by arranging the second interconnecting structure member 62 adjacent to the first edge grid line 2 to be electrically connected to the first diversion grid line 42, and the first interconnecting structure member 61 adjacent to the second edge grid line 3 to be electrically connected to the second diversion grid line 52, the second interconnecting structure member 62 adjacent to the first edge grid line 2 can collect the current converted on the corresponding plurality of first grid line segments 41. At the same time, the current of the plurality of first grid line segments 41 connected to the first edge grid line 2 can be collected by the first edge grid line 2 and then gathered to the first diversion grid line 42, and then diverted to the above-mentioned second interconnecting structure member 62 through the first diversion grid line 42, which is beneficial to the normal use of the battery string 100. Similarly, the first interconnecting structure member 61 adjacent to the second edge grid line 3 can collect the current converted on the corresponding plurality of second grid line segments 51. At the same time, the current of the plurality of second grid line segments 51 connected to the second edge grid line 3 can be collected by the second edge grid line 3 and then gathered to the second diversion grid line 52, and then diverted to the above-mentioned first interconnecting structure member 61 through the second diversion grid line 52, which is beneficial to the electrical connection between the plurality of battery cells 1, thereby facilitating the smooth export of the current on the battery cell 1, which is beneficial to the normal use of the battery string 100.

[0061] Optionally, in combination with Figure 1 , Figure 4 and Figure 5 , the width of at least a part of the first diversion grid line 42 is greater than the width of the first grid segment 41, and the width of at least a part of the second diversion grid line 52 is greater than the width of the second grid segment 51. Since the current of multiple first grid segments 41 is led out through the first diversion grid line 42 to the second interconnecting structure member 62 adjacent to the first edge grid line 2, the current on the first diversion grid line 42 increases. By setting the width of at least a part of the first diversion grid line 42 to be greater than the width of the first grid segment 41, the resistance can be reduced, which is more conducive to the collection and lead-out of the current of multiple first grid segments 41. Similarly, since the current of multiple second grid segments 51 is led out through the second diversion grid line 52 to the first interconnecting structure member 61 adjacent to the second edge grid line 3, the current on the second diversion grid line 52 increases. By setting the width of at least a part of the second diversion grid line 52 to be greater than the width of the second grid segment 51, the resistance can be reduced, which is more conducive to the collection and lead-out of the current of multiple second grid segments 51, so as to facilitate the normal use of the battery cell 1.

[0062] According to some embodiments of the present invention, in combination with Figure 1 , multiple first interconnecting structure members 61 include a first edge interconnecting structure member 611 and multiple first intermediate interconnecting structure members 612. The first edge interconnecting structure member 611 is located between the first edge grid line 2 and the multiple first intermediate interconnecting structure members 612, and a first insulating connection member 6111 is provided between the first edge interconnecting structure member 611 and the first diversion grid line 42. Multiple second interconnecting structure members 62 include a second edge interconnecting structure member 621 and multiple second intermediate interconnecting structure members 622. The second edge interconnecting structure member 621 is located between the second edge grid line 3 and the multiple second intermediate interconnecting structure members 622, and a second insulating connection member 6211 is provided between the second edge interconnecting structure member 621 and the second diversion grid line 52.

[0063] For example, in the example of Figure 1 , the multiple first interconnecting structure members 61 and the multiple second interconnecting structure members 62 are alternately arranged at intervals along the second direction. The one of the multiple first interconnecting structure members 61 adjacent to the first edge grid line 2 is the first edge interconnecting structure member 611, and the others are the first intermediate interconnecting structure members 612. The one of the multiple second interconnecting structure members 62 adjacent to the second edge grid line 3 is the second edge interconnecting structure member 621, and the others are the second intermediate interconnecting structure members 622. The first edge interconnecting structure member 611 is insulated and connected to the corresponding first diversion grid line 42 through the first insulating connection member 6111. The second edge interconnecting structure member 621 is insulated and connected to the corresponding second diversion grid line 52 through the second insulating connection member 6211.

[0064] Thus, the first insulating connector 6111 can ensure the insulated connection between the first edge interconnecting structure 611 and the first current guiding grid line 42, and the second insulating connector 6211 can ensure the insulated connection between the second edge interconnecting structure 621 and the second current guiding grid line 52, thereby avoiding short circuits within the battery cell 1, enabling the current on the first current guiding grid line 42 to converge at the second intermediate interconnecting structure 622 adjacent to the first edge interconnecting structure 611, and enabling the current on the second current guiding grid line 52 to converge at the first intermediate interconnecting structure 612 adjacent to the second edge interconnecting structure 621. As a result, adjacent two battery cells 1 are electrically connected through the corresponding first interconnecting structure 61 and second interconnecting structure 62, which is beneficial for current extraction and ensures the normal use of the battery string 100. In addition, the first insulating connector 6111 and the second insulating connector 6211 have good adhesive effects, enabling the first edge interconnecting structure 611 and the second edge interconnecting structure 621 to be integrated with the battery cell 1, facilitating subsequent operations such as welding.

[0065] According to some embodiments of the present invention, the first insulating connector 6111 is insulating glue. And / or, the second insulating connector 6211 is insulating glue. For example, insulating glue is characterized by good conformability and integrity, rapid solidification, good integrity, small shrinkage rate, no deformation, and high dielectric properties, moisture resistance, and heat conduction ability, thereby enabling the first insulating connector 6111 and the second insulating connector 6211 to have good insulating effects, and effectively avoiding short circuits in the battery string 100. Moreover, it is convenient to use.

[0066] According to some embodiments of the present invention, in combination with Figure 1 and Figure 5 , first connection strengthening members 8 are respectively provided between the first edge interconnecting structure 611 and two second grid line segments 51 adjacent to the first current guiding grid line 42, and / or, second connection strengthening members 9 are respectively provided between each second edge interconnecting structure 621 and two first grid line segments 41 adjacent to the second current guiding grid line 52.

[0067] For example, in Figure 1 and Figure 5In the example, taking a first diversion grid line 42 as an example, a first connection reinforcement 8 is provided between a second grid segment 51 located above the first diversion grid line 42 and adjacent to the first diversion grid line 42 and a first edge interconnection structure member 611, and a first connection reinforcement 8 is provided between a second grid segment 51 located below the first diversion grid line 42 and adjacent to the first diversion grid line 42 and a first edge interconnection structure member 611. For the second diversion grid line 52, a second connection reinforcement 9 is provided between a first grid segment 41 located above the second diversion grid line 52 and adjacent to the second diversion grid line 52 and a second edge interconnection structure member 621, and a second connection reinforcement 9 is provided between a first grid segment 41 located below the second diversion grid line 52 and adjacent to the second diversion grid line 52 and a second edge interconnection structure member 621.

[0068] Thus, by providing the first connection reinforcement 8 and the second connection reinforcement 9, the first connection reinforcement 8 can fill the gap between the second grid segment 51 adjacent to the first diversion grid line 42 and the first edge interconnection structure member 611, and the second connection reinforcement 9 can fill the gap between the first grid segment 41 adjacent to the second diversion grid line 52 and the second edge interconnection structure member 621. The first connection reinforcement 8 enables the first edge interconnection structure member 611 and the second grid line 5 to be completely electrically connected, and the second connection reinforcement 9 enables the second edge interconnection structure member 621 and the first grid line 4 to be completely electrically connected, and the connection is firm, thereby improving the electrical connection yield of the first edge interconnection structure member 611 and the second grid line 5, and improving the electrical connection yield of the second edge interconnection structure member 621 and the first grid line 4.

[0069] In addition, the thickening of the first grid line 4 and the second grid line 5 at the electrical connection position is avoided, thereby reducing the paste loss of the first grid line 4 and the second grid line 5 and lowering the production cost. Additionally, the first connection reinforcement 8 can strengthen the connection strength between the second grid line 5 and the first edge interconnection structure member 611, and the second connection reinforcement 9 can strengthen the connection strength between the first grid line 4 and the second edge interconnection structure member 621, so that the first edge interconnection structure member 611 and the second edge interconnection structure member 621 are stably connected to the battery cell 1, improving the stability of the battery cell 1 during long-term use. Moreover, by providing the first connection reinforcement 8 and the second connection reinforcement 9, the first connection reinforcement 8 and the first insulating connection member 6111 are substantially at the same height, and the second connection reinforcement 9 and the second insulating connection member 6211 are substantially at the same height, which is beneficial for the connection of the first edge interconnection structure member 611 and the second edge interconnection structure member 621 to the battery cell 1 and reduces the offset.

[0070] According to some embodiments of the present invention, in combination with Figure 1 and Figure 5, on the side of each first interconnecting structural member 61 away from the battery cell 1, at least two first adhesive members 7 are provided, and on the side of each second interconnecting structural member 62 away from the battery cell 1, at least two second adhesive members 70 are provided.

[0071] For example, in Figure 1 and Figure 5 's example, when the first edge interconnecting structural member 611 is connected to the corresponding multiple second grid segments 51, such as after welding is completed, and when the second edge interconnecting structural member 621 is connected to the corresponding multiple first grid segments 41, such as after welding is completed, after multiple first intermediate interconnecting structural members 612 are also welded to the corresponding multiple second grid segments 51, and after multiple second intermediate interconnecting structural members 622 are also welded to the corresponding multiple first grid segments 41, that is, after multiple first interconnecting structural members 61 and multiple second interconnecting structural members 62 are welded, two first adhesive members 7 can be provided on the first interconnecting structural member 61, and two second adhesive members 70 can be provided on the second interconnecting structural member 62.

[0072] Thus, the first adhesive member 7 can strengthen the connection relationship between the first interconnecting structural member 61 and the battery cell 1, making the multiple first interconnecting structural members 61 more stably connected to the battery cell 1. The second adhesive member 70 can strengthen the connection relationship between the second interconnecting structural member 62 and the battery cell 1, making the multiple second interconnecting structural members 62 more stably connected to the battery cell 1, improving the service reliability of the battery string 100. In addition, the setting of the first adhesive member 7 and the second adhesive member 70 is simple and convenient to use, thus simplifying the manufacturing process of the battery string 100 and improving the processing efficiency. It should be noted that the positions of the first adhesive member 7 and the second adhesive member 70 are not specifically limited, and can be set at any position in the length direction of the corresponding first interconnecting structural member 61 and second interconnecting structural member 62, reducing the processing requirements.

[0073] According to some embodiments of the present invention, at least two first adhesive members 7 are respectively provided on the two outermost ones along the first direction among the multiple first grid lines 4 and the multiple second grid lines 5, and at least two second adhesive members 70 are respectively provided on the two outermost ones along the first direction among the multiple first grid lines 4 and the multiple second grid lines 5.

[0074] For example, in Figure 1 and Figure 5 's example, the two first adhesive members 7 can be respectively located on the uppermost first grid segment 41 and the lowermost second grid segment 51, and the two second adhesive members 70 can be respectively located on the uppermost first grid segment 41 and the lowermost second grid segment 51. Thus, the connection stability of the first interconnecting structural member 61 is further improved, the connection stability of the second interconnecting structural member 62 is further improved, and it is also beneficial to the rapid setting of the first adhesive member 7 and the second adhesive member 70, improving the processing efficiency of the battery string 100.

[0075] According to some embodiments of the present invention, the first bonding member 7 and the second bonding member 70 are respectively adhesive. Thus, the adhesive has an adhesive effect and can bond the objects to be bonded together, so that the first bonding member 7 and the second bonding member 70 have an adhesive effect. In addition, the adhesive is easy to obtain, thereby reducing the production cost of the first bonding member 7 and the second bonding member 70.

[0076] Combined with Figure 1 and Figure 5 , the manufacturing steps of the battery string 100 of the first embodiment described above are generally as follows:

[0077] First, print the first insulating connector 6111 at the positions of the plurality of first current collecting grid lines 42 opposite to the first edge interconnecting member, and print the second insulating connector 6211 at the positions of the plurality of second current collecting grid lines 52 opposite to the second edge interconnecting structure 621. Among them, the first insulating connector 6111 and the second insulating connector 6211 can be printed synchronously and can both be insulating glue.

[0078] Second, cure the first insulating connector 6111 and the second insulating connector 6211.

[0079] Third, print the first connection strengthening member 8 on the two second grid line segments 51 adjacent to the first current collecting grid line 42, and print the second connection strengthening member 9 on the two first grid line segments 41 adjacent to the second current collecting grid line 52. Among them, the first connection strengthening member 8 and the second connection strengthening member 9 can be printed synchronously and can both be solder paste members.

[0080] Fourth, cure the first connection strengthening member 8 and the second connection strengthening member 9.

[0081] Fifth, lay the first interconnecting structure 61 and the second interconnecting structure 62 and weld them.

[0082] Sixth, print the first bonding member 7 on the plurality of first interconnecting structures 61 respectively, and print the second bonding member 70 on the plurality of second interconnecting structures 62 respectively. For example, the first bonding member 7 and the second bonding member 70 are printed synchronously and can both be adhesive.

[0083] Seventh, cure the first bonding member 7 and the second bonding member 70, and the string production is completed.

[0084] According to some other embodiments of the present invention, combined with Figure 2, the battery string 100 further includes a positioning member 10 which is disposed on the side of the plurality of first interconnecting members 61 and the plurality of second interconnecting members 62 away from the battery cell 1. Thus, by providing the positioning member 10 to define the movement of the plurality of first interconnecting members 61 and the plurality of second interconnecting members 62 relative to the battery cell 1, the offset of the first interconnecting member 61 and the second interconnecting member 62 during the manufacturing process of the battery string 100 is reduced, the manufacturing difficulty is lowered, and the processing efficiency is improved. It should be noted that when the positioning member 10 is provided, there is no need to provide the first adhesive member 7 and the second adhesive member 70, the use of the first adhesive member 7 and the second adhesive member 70 is reduced, the manufacturing time of the battery string 100 is shortened, and the first interconnecting member 61 and the second interconnecting member 62 can be connected to the battery cell 1 as a whole through the positioning member 10.

[0085] For example, the positioning member 10 can be set as a glue dot, a glue strip, a glue film, etc. For example, the positioning member 10 can be set as a glue film having the same shape as the battery cell 1. After the plurality of first interconnecting members 61 and the plurality of second interconnecting members 62 are arranged, the first edge interconnecting member 611 is insulated from the corresponding first current collecting grid line 42 through an insulating adhesive, and the second edge interconnecting member 621 is insulated from the corresponding second current collecting grid line 52 through an insulating adhesive. Then, a first connection strengthening member 8 is provided between the first edge interconnecting member 611 and the corresponding second grid segment 51, a second connection strengthening member 9 is provided between the second edge interconnecting member 621 and the corresponding first grid segment 41, and then the positioning member 10 is covered on the plurality of first interconnecting members 61 and the plurality of second interconnecting members 62. There is no need to perform the bonding connection operation between the plurality of first interconnecting members 61 and the plurality of second interconnecting members 62 and the battery cell 1, nor to separately weld the plurality of first interconnecting members 61 and the plurality of second interconnecting members 62 to the corresponding first grid line 4 and second grid line 5. During the subsequent lamination process of the battery cell 1, alloying can be achieved at the connection between the plurality of first interconnecting members 61 and the plurality of second interconnecting members 62 and the positioning member 10, and the plurality of first interconnecting members 61 and the plurality of second interconnecting members 62 are firmly connected to the battery cell 1 as a whole structure. Thus, the manufacturing process of the battery cell 11 is simplified, the welding connection operation of the plurality of first interconnecting members 61 and the plurality of second interconnecting members 62 is omitted, and at the same time, the stable connection between the plurality of first interconnecting members 61 and the plurality of second interconnecting members 62 and the battery cell 1 is ensured.

[0086] Combined with Figure 2 , the manufacturing steps of the battery string 100 of the second embodiment described above are generally as follows:

[0087] First, print first insulating connectors 6111 at positions of a plurality of first current guiding grid lines 42 opposite to the first edge interconnecting members, and print second insulating connectors 6211 at positions of a plurality of second current guiding grid lines 52 opposite to the second edge interconnecting members 621. Among them, the first insulating connectors 6111 and the second insulating connectors 6211 can be printed synchronously, and both can be insulating adhesives.

[0088] Second, cure the first insulating connectors 6111 and the second insulating connectors 6211.

[0089] Third, print first connection strengthening members 8 on two second grid line segments 51 adjacent to the first current guiding grid lines 42, and print second connection strengthening members 9 on two first grid line segments 41 adjacent to the second current guiding grid lines 52. Among them, the first connection strengthening members 8 and the second connection strengthening members 9 can be printed synchronously, and both can be solder paste members.

[0090] Fourth, cure the first connection strengthening members 8 and the second connection strengthening members 9.

[0091] Fifth, lay a first interconnecting member 61 and a second interconnecting member 62.

[0092] Sixth, cover positioning members 10 such as adhesive films on the first interconnecting member 61 and the second interconnecting member 62, and the stringing is completed for production.

[0093] According to some other embodiments of the present invention, in combination with Figure 3 , third insulating connectors 412 are respectively provided at one ends of a plurality of first grid line segments 41 close to the first interconnecting member 61, and insulation is provided between the first current guiding grid lines 42 and the corresponding first interconnecting member 61 through fourth insulating connectors 421. And / or, fifth insulating connectors 512 are respectively provided at one ends of a plurality of second grid line segments 51 close to the second interconnecting member 62, and insulation is provided between the second current guiding grid lines 52 and the corresponding second interconnecting member 62 through sixth insulating connectors (not shown in the figure).

[0094] For example, in Figure 3In the example, the ends of multiple first grid line segments 41 adjacent to the first edge interconnecting structural member 611 are all covered with a third insulating connecting member 412, and the ends of multiple first grid line segments 41 adjacent to the first intermediate interconnecting structural member 612 are also all covered with a third insulating connecting member 412. At least at the connection position of the first diversion grid line 42 with the first edge interconnecting structural member, a fourth insulating connecting member 421 is provided. The ends of multiple second grid line segments 51 adjacent to the second edge interconnecting structural member 621 are all covered with a fifth insulating connecting member 512, and the ends of multiple second grid line segments 51 adjacent to the second intermediate interconnecting structural member 622 are also all covered with a fifth insulating connecting member 512. At least at the connection position of the second diversion grid line 52 with the second edge interconnecting structural member, a sixth insulating connecting member is provided.

[0095] With such an arrangement, the ends of multiple first grid line segments 41 adjacent to the first interconnecting structural member 61 are all provided with a third insulating connecting member 412, and a fourth insulating connecting member 421 is provided at the first diversion grid line 42 that is insulated from the first edge interconnecting structural member 611, which can prevent the first interconnecting structural member 61 from shifting and contacting the adjacent first grid line segments 41 during the processing of the battery string 100. By spacing apart adjacent two first grid line segments 41, and under the action of the third insulating connecting member 412, the insulated connection between the first interconnecting structural member 61 and multiple first grid lines 4 is further ensured, improving the usage reliability of the battery string 100. At the same time, the ends of multiple second grid line segments 51 adjacent to the second interconnecting structural member 62 are all provided with a fifth insulating connecting member 512, and a sixth insulating connecting member is provided at the second diversion grid line 52 that is insulated from the second edge interconnecting structural member 621, which can prevent the second interconnecting structural member 62 from shifting and contacting the adjacent second grid line segments 51 during the processing of the battery string 100. By spacing apart adjacent two second grid line segments 51, and under the action of the fifth insulating connecting member 512, the insulated connection between the second interconnecting structural member 62 and multiple second grid lines 5 is further ensured, improving the usage reliability of the battery string 100. In addition, the insulated connection between the first edge interconnecting structural member 611 and the first diversion grid line 42 is ensured, and the insulated connection between the second edge interconnecting structural member 621 and the second diversion grid line 52 is ensured, further ensuring the normal use of the battery string 100 and improving the usage performance. For example, the third insulating connecting member 412, the fourth insulating connecting member 421, the fifth insulating connecting member 512, and the sixth insulating connecting member can be set as insulating glue. The insulating glue has a low usage cost and is convenient to use, which can improve the processing efficiency of the battery string 100.

[0096] According to some embodiments of the present invention, in combination with Figure 3 , third connection strengthening members 413 are respectively provided between multiple first grid line segments 41 and the corresponding second interconnecting structural member 62, and fourth connection strengthening members 513 are respectively provided between multiple second grid line segments 51 and the corresponding first interconnecting structural member 61.

[0097] For example, for each first interconnecting structural member 61, a fourth connection strengthening member 513 is provided at each position where it is connected to a plurality of second gate line segments 51. A third connection strengthening member 413 is provided between each of the plurality of first gate line segments 41 and the corresponding second interconnecting structural member 62. With such an arrangement, the first interconnecting structural member 61 can be electrically connected to the plurality of second gate line segments 51 through the plurality of fourth connection strengthening members 513. The number of connection points is large and the connection is firm, so that the first interconnecting structural member 61 is stably connected to the battery cell 1, which is beneficial to the long-term stable use of the battery string 100. The second interconnecting structural member 62 can be electrically connected to the plurality of first gate line segments 41 through the plurality of third connection strengthening members 413. The number of connection points is large and the connection is firm, so that the second interconnecting structural member 62 is stably connected to the battery cell 1, which is beneficial to the long-term stable use of the battery string 100.

[0098] According to some alternative embodiments of the present invention, the first connection strengthening member 8 and / or the second connection strengthening member 9 is a solder paste member, and the third connection strengthening member 413 and / or the fourth connection strengthening member 513 is a solder paste member. For example, the first connection strengthening member 8, the second connection strengthening member 9, the third connection strengthening member 413 and the fourth connection strengthening member 513 are the same and are solder paste members respectively. Thus, the electrical connection strength between the first interconnecting structural member 61 and the corresponding second gate line segment 51 is increased, the welding tensile force is increased, the welding performance is improved, and the connection between the first interconnecting structural member 61 and the battery cell 1 is more stable. Moreover, the electrical connection strength between the second interconnecting structural member 62 and the corresponding first gate line segment 41 is also increased, the welding performance is improved, and the connection between the second interconnecting structural member 62 and the battery cell 1 is more stable, thereby improving the use reliability of the battery string 100 and enhancing the use performance of the battery string 100. In addition, the first connection strengthening member 8, the second connection strengthening member 9, the third connection strengthening member 413 and the fourth connection strengthening member 513 can be printed simultaneously to simplify the manufacturing steps of the battery string 100 and improve the processing efficiency.

[0099] Combined with Figure 3 , the manufacturing steps of the battery string 100 of the above third embodiment are generally as follows:

[0100] First, print third insulating connectors 412 at the ends of multiple first grid line segments 41 close to the first break openings 411, and print fourth insulating connectors 421 at least at the positions where multiple first current-carrying grid lines 42 are connected to the first edge interconnecting structure 611. Print fifth insulating connectors 512 at the ends of multiple second grid line segments 51 close to the second break openings 511, and print sixth insulating connectors at least at the positions where multiple second current-carrying grid lines 52 are connected to the second edge interconnecting structure 621. Among them, the third insulating connectors 412, the fourth insulating connectors 421, the fifth insulating connectors 512, and the sixth insulating connectors can be printed synchronously, and all can be insulating adhesives.

[0101] Second, cure the third insulating connectors 412, the fourth insulating connectors 421, the fifth insulating connectors 512, and the sixth insulating connectors.

[0102] Third, print third connection strengthening members 413 on multiple first grid line segments 41 respectively, and print fourth connection strengthening members 513 on multiple second grid line segments 51 respectively. Among them, the third connection strengthening members 413 and the fourth connection strengthening members 513 can be printed synchronously, and all can be solder paste members.

[0103] Fourth, cure the third connection strengthening members 413 and the fourth connection strengthening members 513.

[0104] Fifth, lay the first interconnecting structure 61 and the second interconnecting structure 62.

[0105] Sixth, weld the first interconnecting structure 61 and the second interconnecting structure 62 to complete the production of the series string.

[0106] In the above first embodiment and second embodiment, insulating adhesive and solder paste are printed only at partial positions, reducing the usage amount of the insulating adhesive and the solder paste, and reducing the production cost of the battery string 100. In the third embodiment, solder paste is printed at the welding positions of each first interconnecting structure 61 and second interconnecting structure 62, increasing the welding tensile force and improving the reliability of the battery string 100.

[0107] According to some embodiments of the present invention, in combination with Figure 1 and Figure 5 , there are multiple first current-carrying grid lines 42, and the multiple first current-carrying grid lines 42 are arranged at intervals along the first direction. The ratio of the distance between two adjacent first current-carrying grid lines 42 to the distance between the first interconnecting structure 61 and the second interconnecting structure 62 is b 3 , where b 3 satisfies: 0.5 ≤ b 3≤ 3. And / or, there are multiple second diversion grid lines 52, and the multiple second diversion grid lines 52 are arranged at intervals in the first direction. The ratio of the distance between two adjacent second diversion grid lines 52 to the distance between the first interconnecting structure 61 and the second interconnecting structure 62 is b 4 , where b 4 satisfies: 0.5 ≤ b 4 ≤ 3.

[0108] For example, in the examples of Figure 1 and Figure 5 , there are two first diversion grid lines 42 and also two second diversion grid lines 52. Of course, Figure 1 and Figure 5 the first diversion grid lines 42 and the second diversion grid lines 52 in Figure 1 and Figure 5 are only examples for illustration, and the first diversion grid lines 42 and the second diversion grid lines 52 are not limited to the quantities in 3 The above-mentioned b refers to the ratio of the distance between two adjacent first diversion grid lines 42 to the distance between the first interconnecting structure 61 and the adjacent second interconnecting structure 62. The above-mentioned b 4 refers to the ratio of the distance between two adjacent second diversion grid lines 52 to the distance between the first interconnecting structure 61 and the adjacent second interconnecting structure 62.

[0109] When the above-mentioned b 3 and b 4 are less than 0.5, that is, the distance between two adjacent first diversion grid lines 42 is less than the distance between the first interconnecting structure 61 and the adjacent second interconnecting structure 62, and the distance between two adjacent second diversion grid lines 52 is also less than the distance between the first interconnecting structure 61 and the adjacent second interconnecting structure 62. The distance between two adjacent first diversion grid lines 42 is relatively small, and the distance between two adjacent second diversion grid lines 52 is also relatively small, thus increasing the number of the first diversion grid lines 42 and the second diversion grid lines 52 on the battery cell 1 and increasing the printing cost of the grid lines. When the above-mentioned b 3 and b 4 are greater than 3, that is, the distance between two adjacent first diversion grid lines 42 is more than twice the distance between the first interconnecting structure 61 and the adjacent second interconnecting structure 62, and the distance between two adjacent second diversion grid lines 52 is also more than twice the distance between the first interconnecting structure 61 and the adjacent second interconnecting structure 62. The distance between two adjacent first diversion grid lines 42 is relatively large, and the distance between two adjacent second diversion grid lines 52 is also relatively large, increasing the current carried on each first diversion grid line 42 and each second diversion grid line 52.

[0110] Thus, by setting the ratio b of the distance between two adjacent first diversion grid lines 42 to the distance between the first interconnecting member 61 and the second interconnecting member 62 3 satisfies 0.5 ≤ b 3 ≤ 3, and the ratio b of the distance between two adjacent second diversion grid lines 52 to the distance between the first interconnecting member 61 and the second interconnecting member 62 4 satisfies 0.5 ≤ b 4 ≤ 3. The distance between two adjacent first diversion grid lines 42 is set reasonably, and the distance between two adjacent second diversion grid lines 52 is also set reasonably, which is conducive to the first diversion grid line 42 to conduct the current on multiple first grid segments 41, and is also conducive to the second diversion grid line 52 to conduct the current on multiple second grid segments 51, thereby facilitating the use of the battery string 100. In addition, the production cost of the battery cell 1 can also be reduced.

[0111] According to some embodiments of the present invention, in combination with Figure 1 and Figure 5 , the ratio of the width of at least a part of the first diversion grid line 42 to the width of the first grid segment 41 is b 1 , wherein, b 1 satisfies: 2 ≤ b 1 ≤ 3; and / or, the ratio of the width of at least a part of the second diversion grid line 52 to the width of the second grid segment 51 is b 2 , wherein, b 2 satisfies: 2 ≤ b 2 ≤ 3.

[0112] For example, in the example of Figure 2 , there are two first diversion grid lines 42, and there are six first grid segments 41 connected to the first edge grid line 2. Each first diversion grid line 42 can collect the current on three adjacent first grid segments 41 corresponding thereto (for example, Figure 5 the two first grid segments 41 above the first diversion grid line 42 near the upper side edge of the battery cell 1 and the one first grid segment 41 below it), so that the current on multiple first grid segments 41 can be diverted to the corresponding second interconnecting member 62 through multiple first diversion grid lines 42. As shown in Figure 5 , there are two second diversion grid lines 52, and there are six second grid segments 51 connected to the second edge grid line 3. Each second diversion grid line 52 can collect the current on three corresponding second grid segments 51, so that the current on multiple second grid segments 51 can be diverted to the corresponding first interconnecting member 61 through multiple second diversion grid lines 52.

[0113] Thus, by setting the ratio of the width of the above at least a part of the first diversion grid line 42 (i.e., the thickened part of the first diversion grid line 42) to the width of the first grid segment 41 to satisfy: 2 ≤ b1 ≤ 3, the ratio of the width of at least a part of the second diversion grid line 52 (i.e., the thickened part of the second diversion grid line 52) to the width of the second grid segment 51 satisfies: 2 ≤ b 2 ≤ 3. The widths of the thickened parts of the first diversion grid line 42 and the second diversion grid line 52 are reasonably set, which is beneficial to the collection of currents of a plurality of adjacent first grid segments 41 and a plurality of second grid segments 51. At the same time, it can also avoid the increase in the amount of material caused by the over-thickness of the first diversion grid line 42 and the second diversion grid line 52. Therefore, while being beneficial to the use of the battery cell 1, it can also reduce the production cost of the battery cell 1.

[0114] According to some embodiments of the present invention, in combination with Figure 2 , a first break opening 411 is defined between two adjacent first grid segments 41, and the plurality of first break openings 411 of the plurality of first grid lines 4 are respectively opposite to each other along the first direction. A second break opening 511 is defined between two adjacent second grid segments 51, and the plurality of second break openings 511 of the plurality of second grid lines 5 are respectively opposite to each other along the first direction.

[0115] For example, in the example of Figure 5 , the plurality of first break openings 411 of each first grid line 4 are arranged at intervals along the second direction (for example, the left - right direction in Figure 5 ). The plurality of first break openings 411 of the plurality of first grid lines 4 are respectively arranged opposite to each other up and down in multiple columns, and the multiple columns of the above - mentioned first break openings 411 are arranged at intervals along the second direction. The plurality of second break openings 511 of each second grid line 5 are arranged at intervals along the second direction. The plurality of second break openings 511 of the plurality of second grid lines 5 are respectively arranged opposite to each other up and down in multiple columns, and the multiple columns of the above - mentioned second break openings 511 and the multiple columns of the above - mentioned first break openings 411 are arranged alternately along the second direction. Thus, by setting the first break opening 411 and the second break opening 511, the plurality of first interconnection structure members 61 can be insulatively connected to the plurality of first grid lines 4 by being arranged at the corresponding plurality of first break openings 411, and the plurality of second interconnection structure members 62 can be insulatively connected to the plurality of second grid lines 5 by being arranged at the corresponding plurality of second break openings 511, without using other structures for insulation, which is beneficial to the connection between the battery cell 1 and the first interconnection structure members 61 and the second interconnection structure members 62.

[0116] Optionally, one end of at least a part of the first diversion grid line 42 is connected to the first edge grid line 2, and the other end of at least a part of the first diversion grid line 42 extends to a position opposite to the second break opening 511 along the first direction. And / or, one end of at least a part of the second diversion grid line 52 is connected to the second edge grid line 3, and the other end of at least a part of the second diversion grid line 52 extends to a position opposite to the first break opening 411 along the first direction.

[0117] For example, in Figure 5 In the example of Figure 5 , the left end of the thickened part of the first diversion grid line 42 is connected to the first edge grid line 2, and the right end of the thickened part of the first diversion grid line 42 extends rightward to a position vertically opposite to the second break opening 511. The right end of the thickened part of the second diversion grid line 52 is connected to the second edge grid line 3, and the left end of the thickened part of the second diversion grid line 52 extends leftward to a position vertically opposite to the first break opening 411. As Figure 5 shown, the other end of the first diversion grid line 42 extends to a position opposite to the second break opening 511 adjacent to the first edge grid line 2 along the first direction, and the other end of the second diversion grid line 52 extends to a position opposite to the first break opening 411 adjacent to the second edge grid line 3 along the first direction. Of course, the other end of the first diversion grid line 42 may also extend to a position opposite to other second break openings 511 along the first direction, and the other end of the second diversion grid line 52 may also extend to a position opposite to other first break openings 411 along the first direction.

[0118] With such a setting, multiple first grid segments 41 connected to the first edge grid line 2 can be converged to the first diversion grid line 42 through the first edge grid line 2, and then the current is diverted to the second interconnecting structure 62 connected to the first diversion grid line 42 through the first diversion grid line 42. That is to say, by extending the first diversion grid line 42 to a position vertically opposite to the second break opening 511, the first diversion grid line 42 is electrically connected to the second interconnecting structure 62 at the corresponding position to lead out the current, so as to realize the series connection between multiple battery cells 1. Similarly, multiple second grid segments 51 connected to the second edge grid line 3 can be converged to the second diversion grid line 52 through the second edge grid line 3, and then the current is diverted to the first interconnecting structure 61 connected to the second diversion grid line 52 through the second diversion grid line 52. That is to say, by extending the second diversion grid line 52 to a position vertically opposite to the first break opening 411, the second diversion grid line 52 is electrically connected to the first interconnecting structure 61 at the corresponding position to lead out the current, so as to realize the series connection between multiple battery cells 1.

[0119] According to some embodiments of the present invention, in combination with Figure 4 and Figure 5 , the other end of the first diversion grid line 42 extends to a position opposite to the second break opening 511 adjacent to the first edge grid line 2 along the first direction. And / or, the other end of the second diversion grid line 52 extends to a position opposite to the first break opening 411 adjacent to the second edge grid line 3 along the first direction.

[0120] For example, in Figure 4 and Figure 5In the example, the left end of the thickened part of the first diversion grid line 42 is connected to the first edge grid line 2, and the right end of the thickened part of the first diversion grid line 42 extends to a position opposite to the second break opening 511 adjacent to the first edge grid line 2 in the up and down direction. That is, the thickened part of the first diversion grid line 42 extends to the second interconnecting structure member 62 adjacent to the first edge grid line 2, so that the width of the part of the first diversion grid line 42 between the first edge grid line 2 and the second interconnecting structure member 62 adjacent to the first edge grid line 2 is relatively large, which is more conducive to the outflow of the current of the plurality of first grid segments 41 connected to the first edge grid line 2, and further improves the reliability of the use of the battery cell 1. Moreover, it is also possible to avoid increasing the amount of paste used due to making the length of the thickened part of the first diversion grid line 42 too long.

[0121] For example, in Figure 4 and Figure 5 In the example, the right end of the thickened part of the second diversion grid line 52 is connected to the second edge grid line 3, and the left end of the thickened part of the second diversion grid line 52 extends to a position opposite to the first break opening 411 adjacent to the second edge grid line 3 in the up and down direction. That is, the thickened part of the second diversion grid line 52 extends to the first interconnecting structure member 61 adjacent to the second edge grid line 3, so that the width of the part of the second diversion grid line 52 between the second edge grid line 3 and the first interconnecting structure member 61 adjacent to the second edge grid line 3 is relatively large, which is more conducive to the outflow of the current of the plurality of second grid segments 51 connected to the second edge grid line 3, and further improves the reliability of the use of the battery cell 1. Moreover, it is also possible to avoid increasing the amount of paste used due to making the length of the thickened part of the second diversion grid line 52 too long.

[0122] According to some embodiments of the present invention, the length of the first break opening 411 in the second direction is L 1 , where L 1 satisfies: 0.4 mm ≤ L 1 ≤ 1.6 mm. And / or, the length of the second break opening 511 in the second direction is L 2 , where L 2 satisfies: 0.4 mm ≤ L 2 ≤ 1.6 mm. For example, the settings of the first break opening 411 and the second break opening 511 include the following situations: First, the length of the first break opening 411 in the second direction is L 1 , L 1 satisfies: 0.4 mm ≤ L 1 ≤ 1.6 mm, and the length of the second break opening 511 is not limited. Second, the length of the second break opening 511 in the second direction is L 2 , L 2 satisfies: 0.4 mm ≤ L 2≤1.6 mm, the length of the first break opening 411 is not limited. Third, the length of the first break opening 411 in the second direction is L 1 The length of the second break opening 511 in the second direction is L 1 , L 1 and L 2 respectively satisfy: 0.4 mm ≤ L 1 ≤1.6 mm, 0.4 mm ≤ L 2 ≤1.6 mm.

[0123] When the length L of the first break opening 411 1 is less than 0.4 mm, the length of the first break opening 411 is small. Thus, when electrically connecting multiple solar cells 1 through the first interconnecting member 61, the distance between the side of the first interconnecting member 61 and the side of the corresponding first break opening 411 of the first grid line 4 is small, and the first interconnecting member 61 is likely to contact the adjacent first grid line segment 41, so that the solar cell string 100 is likely to short-circuit, which is not conducive to the normal use of the solar cell string 100. In addition, the assembly difficulty between the solar cell 1 and the first interconnecting member 61 is also increased, and the assembly efficiency of the solar cell string 100 is reduced. When the length L of the first break opening 411 1 is greater than 1.6 mm, the length of the first break opening 411 is large, shortening the length of the first grid line 4 and reducing the occupied area of the first grid line 4 on the solar cell 1, thereby reducing the utilization of the surface of the solar cell 1, and further reducing the use efficiency of the solar cell 1.

[0124] When the length L of the second break opening 511 2 is less than 0.4 mm, the length of the second break opening 511 is small. Thus, when electrically connecting multiple solar cells 1 through the second interconnecting member 62, the distance between the side of the second interconnecting member 62 and the side of the corresponding second break opening 511 of the second grid line 5 is small, and the second interconnecting member 62 is likely to contact the adjacent second grid line segment 51, so that the solar cell string 100 is likely to short-circuit, which is not conducive to the normal use of the solar cell string 100. In addition, the assembly difficulty between the solar cell 1 and the second interconnecting member 62 is also increased, and the assembly efficiency of the solar cell string 100 is reduced. When the length L of the second break opening 511 2 is greater than 1.6 mm, the length of the second break opening 511 is large, shortening the length of the second grid line 5 and reducing the occupied area of the second grid line 5 on the solar cell 1, thereby reducing the utilization rate of the surface of the solar cell 1, and further reducing the use efficiency of the solar cell 1.

[0125] Therefore, by setting the length L of the first break opening 411 in the second direction 1 and the length L of the second break opening 511 in the second direction 2 , respectively satisfy: 0.4 mm ≤ L 1≤1.6 mm, 0.4 mm ≤ L 2 When it is ≤ 1.6 mm, the lengths of the first breaking opening 411 and the second breaking opening 511 are reasonably set. Thus, when electrically connecting multiple battery cells 1 through the interconnection structure member 6, short circuit of the battery string 100 can be avoided, thereby extending the service life of the battery string 100. In addition, while reducing the material consumption of the first grid line 4 and the second grid line 5, the occupied areas of the first grid line 4 and the second grid line 5 are ensured, which is more beneficial to the use of the battery cell 1. Additionally, the assembly difficulty between the battery cell 1 and the interconnection structure member 6 is also reduced, and the assembly efficiency of the battery string 100 is improved.

[0126] According to some embodiments of the present invention, in combination with Figure 1 , Figure 4 and Figure 5 , there are multiple first diversion grid lines 42, and the multiple first diversion grid lines 42 are arranged at uniform intervals along the first direction. And / or, there are multiple second diversion grid lines 52, and the multiple second diversion grid lines 52 are arranged at uniform intervals along the first direction.

[0127] For example, taking the length of the battery cell 1 as 182 mm and the width as 91 mm as an example, the first diversion grid lines 42 and the second diversion grid lines 52 are respectively set to be multiple. The multiple first diversion grid lines 42 are arranged at uniform intervals along the first direction, and the multiple second diversion grid lines 52 are arranged at uniform intervals along the first direction. Thus, by providing multiple first diversion grid lines 42 and multiple second diversion grid lines 52, the currents of the multiple first grid line segments 41 can flow out through the adjacent first diversion grid lines 42 respectively, and the currents of the multiple second grid line segments 51 can flow out through the adjacent second diversion grid lines 52 respectively. The multiple first diversion grid lines 42 and the multiple second diversion grid lines 52 can respectively play the role of current diversion, which is more beneficial to the extraction of the currents of the multiple first grid line segments 41 and the multiple second grid line segments 51. Moreover, the current magnitudes on the multiple first diversion grid lines 42 can be made to differ less, and the current magnitudes on the multiple second diversion grid lines 52 can also be made to differ less, thereby improving the stability of the photoelectric conversion of the battery cell 1 and the reliability of use of the battery cell 1.

[0128] According to some embodiments of the present invention, the ratio of the width of the first edge grid line 2 to the width of the first grid line segment 41 is b 3 , where b 3 satisfies: 2 ≤ b 3 ≤ 3. And / or, the ratio of the width of the second edge grid line 3 to the width of the second grid line segment 51 is b 4 , where b 4 satisfies: 2 ≤ b 4 ≤ 3.

[0129] When the solar cell 1 is used in the solar cell string 100, the current converted and collected on the multiple first grid segments 41 connected to the first edge grid line 2 flows through the first edge grid line 2 and the corresponding first current guiding grid line 42 to the second interconnection structure 62, and the current converted and collected on the multiple second grid segments 51 connected to the second edge grid line 3 flows through the second edge grid line 3 and the corresponding second current guiding grid line 52 to the first interconnection structure 61. Thus, by setting the width of the first edge grid line 2 to be 2 to 3 times the width of the first grid segment 41 and the width of the second edge grid line 3 to be 2 to 3 times the width of the second grid segment 51, it is beneficial to the current transmission between the multiple first grid segments 41 and the first edge grid line 2, and also beneficial to the current transmission between the multiple second grid segments 51 and the second edge grid line 3, so as to ensure the normal use of the solar cell 1. Moreover, it can also avoid the increase in the amount of grid line material used due to the excessive width of the first grid line 4 and the second edge grid line 3, thereby reducing the production cost of the solar cell 1.

[0130] According to some embodiments of the present invention, in combination with Figure 2 , the minimum distance between the first edge grid line 2 and the edge of the solar cell 1 in the second direction is L 3 , where L 3 satisfies: 0.3 mm ≤ L 3 ≤ 1 mm. And / or, the minimum distance between the second edge grid line 3 and the edge of the solar cell 1 in the second direction is L 4 , where L 4 satisfies: 0.3 mm ≤ L 4 ≤ 1 mm.

[0131] For example, in Figure 5 the example, the above L 3 refers to the straight-line distance in the second direction between the first edge grid line 2 and the left edge of the solar cell 1, and the above L 4 refers to the straight-line distance in the second direction between the second edge grid line 3 and the right edge of the solar cell 1. When the minimum distance L 3 between the first edge grid line 2 and the edge of the solar cell 1 in the second direction is less than 0.3 mm, the distance between the first edge grid line 2 and the edge of the solar cell 1 is small. When printing the first edge grid line 2, the first edge grid line 2 is likely to shift outside the solar cell 1, which is not conducive to the processing of the solar cell 1. When the minimum distance L 3 between the first edge grid line 2 and the edge of the solar cell 1 in the second direction is greater than 1 mm, the distance between the first edge grid line 2 and the edge of the solar cell 1 is too large, the utilization rate of the surface of the solar cell 1 is reduced, thereby reducing the photoelectric conversion ability of the solar cell 1, and further reducing the use performance of the solar cell 1.

[0132] Thus, by setting the minimum distance between the first edge grid line 2 and the edge of the cell 1 in the second direction to be L 3 satisfies 0.3 mm ≤ L 3 ≤ 1 mm, and the minimum distance between the second edge grid line 3 and the edge of the cell 1 in the second direction is L 4 satisfies 0.3 mm ≤ L 4 ≤ 1 mm. The position of the first edge grid line 2 is reasonably set, and the position of the second edge grid line 3 is reasonably set, which is beneficial to the processing of the cell 1, and at the same time can improve the utilization rate of the surface of the cell 1, is beneficial to the photoelectric conversion of the cell 1, and thus is beneficial to the use of the cell 1.

[0133] According to some embodiments of the present invention, the minimum distance between the above-mentioned one end of the first edge grid line 2 and the second grid line 5 is L 5 , where L 5 satisfies: 0.2 mm ≤ L 5 ≤ 1 mm. And / or, the distance between the second edge grid line 3 and the other end of the first grid line 4 is both L 6 , where L 6 satisfies: 0.2 mm ≤ L 6 ≤ 1 mm.

[0134] For example, in Figure 5 the example, the distance between the first edge grid line 2 and the left end of the second grid line segment 51 close to the first edge grid line 2 is L 5 , and the distance between the second edge grid line 3 and the right end of the first grid line segment 41 close to the second edge grid line 3 is L 6 . When the distance between the first edge grid line 2 and the end of the second grid line segment 51 far from the second edge grid line 3 is less than 0.2 mm, the distance between the above-mentioned one end of the plurality of second grid line segments 51 and the first edge grid line 2 is small, so that during the use of the cell 1, the left ends of the plurality of second grid lines 5 and the first edge grid line 2 are likely to affect each other and cause a short circuit, which is not conducive to the long-term normal use of the cell 1. When the distance between the first edge grid line 2 and the end of the second grid line segment 51 far from the second edge grid line 3 is greater than 1 mm, the distance between the above-mentioned one end of the plurality of second grid line segments 51 and the first edge grid line 2 is large, thereby reducing the occupied area of the second grid line 5 on the surface of the cell 1, reducing the surface utilization rate of the cell 1, and further reducing the photoelectric conversion ability of the cell 1.

[0135] Thus, by setting the minimum distance L between the first edge grid line 2 and the above-mentioned one end of the second grid line 5 5 satisfies 0.2 mm ≤ L 5When it is ≤ 1 mm, the distance between the multiple second grid segments 51 close to the first edge grid line 2 and the first edge grid line 2 is reasonably set, so that during the use of the battery cell 1, the multiple second grid segments 51 and the first edge grid line 2 do not affect each other and cause a short circuit, and thus the battery cell 1 can be used normally for a long time. In addition, on the premise of ensuring that the multiple second grid segments 51 and the first edge grid line 2 do not affect each other and cause a short circuit, the occupied area of the second grid segments 51 on the surface of the battery cell 1 is increased, the surface utilization rate of the battery cell 1 is improved, and thus the photoelectric conversion ability of the battery cell 1 is improved.

[0136] For example, when the distance between the second edge grid line 3 and the ends of the multiple first grid segments 41 far from the first edge grid line 2 is less than 0.2 mm, the distance between the right ends of the multiple first grid segments 41 and the second edge grid line 3 is small, so that during the use of the battery cell 1, the multiple first grid segments 41 and the second edge grid line 3 are likely to affect each other and cause a short circuit, which is not conducive to the long-term normal use of the battery cell 1. When the distance between the second edge grid line 3 and the ends of the multiple first grid segments 41 far from the first edge grid line 2 is greater than 0.1 mm, the distance between the right ends of the multiple first grid segments 41 and the second edge grid line 3 is large, thereby reducing the occupied area of the first grid line 4 on the surface of the battery cell 1, reducing the surface utilization rate of the battery cell 1, and thus reducing the photoelectric conversion ability of the battery cell 1.

[0137] Therefore, by setting the distance L between the second edge grid line 3 and the other end of the first grid line 4 6 to satisfy 0.2 mm ≤ L 6 ≤ 1 mm, the distance between the ends of the multiple first grid lines 4 close to the second edge grid line 3 and the second edge grid line 3 is reasonably set, so that during the use of the battery cell 1, the multiple first grid lines 4 and the second edge grid line 3 do not affect each other and cause a short circuit, and thus the battery cell 1 can be used normally for a long time. In addition, on the premise of ensuring that the multiple first grid lines 4 and the second edge grid line 3 do not affect each other and cause a short circuit, the occupied area of the first grid line 4 on the surface of the battery cell 1 is increased, the surface utilization rate of the battery cell 1 is improved, and thus the photoelectric conversion ability of the battery cell 1 is improved.

[0138] According to some embodiments of the present invention, the distance between the first grid line 4 and the adjacent second grid line 5 is d 1 , where d 1 satisfies: 0.3 mm ≤ d 1 ≤ 1 mm.

[0139] For example, in Figure 5 the example, the minimum distance between the first grid line 4 and the adjacent second grid line 5 in the up and down direction is d 1When the distance d between the first grid line 4 and the adjacent second grid line 5 1 is less than 0.3 mm, the distance between the first grid line 4 and the second grid line 5 is small. Thus, during the use of the solar cell 1, the current on the first grid line 4 and the second grid line 5 are likely to influence each other and cause a short circuit, and it also increases the printing difficulty of the first grid line 4 and the second grid line 5, thereby increasing the processing difficulty of the solar cell 1. When the distance d between the first grid line 4 and the adjacent second grid line 5 1 is greater than 1 mm, the distance between the first grid line 4 and the second grid line 5 is large, reducing the number of the first grid line 4 and the second grid line 5 on the solar cell 1, thereby reducing the surface utilization rate of the solar cell 1, weakening the photoelectric conversion ability of the solar cell 1, and further reducing the performance of the solar cell 1 in use.

[0140] Therefore, by setting the distance d between the first grid line 4 and the adjacent second grid line 5 1 to satisfy: 0.3 mm ≤ d 1 ≤ 1 mm, the distance between the first grid line 4 and the second grid line 5 is reasonably set, thus avoiding a short circuit between the first grid line 4 and the second grid line 5 and reducing the processing difficulty of the solar cell 1. In addition, the arrangement quantity of the plurality of first grid lines 4 and the plurality of second grid lines 5 is rationalized, thereby improving the surface utilization rate of the solar cell 1, enhancing the photoelectric conversion ability of the solar cell 1, and further improving the performance of the solar cell 1 in use.

[0141] According to some embodiments of the present invention, the distance between two adjacent first grid lines 4 is d 2 , wherein, d 2 satisfies: 0.6 mm ≤ d 2 ≤ 2 mm; the distance between two adjacent second grid lines 5 is d 3 , wherein, d 3 satisfies: 0.6 mm ≤ d 3 ≤ 2 mm.

[0142] For example, in the example of Figure 5 , the minimum distance d between two adjacent first grid lines 4 in the vertical direction 2 , and the minimum distance d between two adjacent second grid lines 5 in the vertical direction is d 3 . When the distance d between two adjacent first grid lines 4 2 is less than 0.6 mm, the distance between two adjacent first grid lines 4 is small, making it inconvenient to arrange the first grid line 4 between two adjacent second grid lines 5, increasing the production difficulty of the solar cell 1. When the distance d between two adjacent first grid lines 4 2When it is greater than 2 mm, the spacing between two adjacent first grid lines 4 is relatively large, reducing the number of multiple first grid lines 4 arranged on the cell 1, thereby reducing the surface area utilization rate of the cell 1. When the spacing d between two adjacent second grid lines 5 2 is less than 0.6 mm, the spacing between two adjacent second grid lines 5 is relatively small, making it inconvenient to arrange the first grid line 4 between two adjacent second grid lines 5, increasing the production difficulty of the cell 1. When the spacing d between two adjacent second grid lines 5 2 is greater than 2 mm, the spacing between two adjacent second grid lines 5 is relatively large, reducing the number of multiple second grid lines 5 arranged on the cell 1, thereby reducing the area utilization rate of the cell 1.

[0143] Therefore, by setting the spacing d between two adjacent first grid lines 4 2 , and the spacing d between two adjacent second grid lines 5 3 , which respectively satisfy: 0.6 mm ≤ d 2 ≤ 2 mm, 0.6 mm ≤ d 3 ≤ 2 mm, the spacing between two adjacent first grid lines 4 and the spacing between two adjacent second grid lines 5 are reasonably set, reducing the production difficulty of the cell 1, thereby improving the production efficiency of the cell 1. In addition, the arrangement numbers of multiple first grid lines 4 and multiple second grid lines 5 are rationalized, thereby improving the surface utilization rate of the cell 1, enhancing the photoelectric conversion ability of the cell 1, and further improving the service performance of the cell 1.

[0144] The photovoltaic module according to the second aspect embodiment of the present invention includes the battery string 100 according to the first aspect embodiment above.

[0145] For the photovoltaic module according to the present invention, by adopting the above battery string 100, the production cost of the photovoltaic module is reduced, and the power generation amount of the photovoltaic module is increased.

[0146] The photovoltaic power generation system according to the third aspect embodiment of the present invention includes the battery string 100 according to the first aspect embodiment above, or the photovoltaic module according to the second aspect embodiment above.

[0147] For the photovoltaic power generation system according to the present invention, by adopting the above battery string 100 or the above photovoltaic module, the production cost of the photovoltaic power generation system is reduced, the power generation amount of the photovoltaic power generation system is increased, and the service performance of the photovoltaic power generation system is improved.

[0148] The other constitutions and operations of the battery string 100, the photovoltaic module, and the photovoltaic power generation system according to the embodiments of the present invention are known to those of ordinary skill in the art, and will not be described in detail here.

[0149] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0150] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0151] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A battery string, characterized in that: include: A plurality of battery cells, wherein a first edge grid line, a second edge grid line, a plurality of first grid lines and a plurality of second grid lines are arranged on a surface of one side of the battery cell, the first edge grid line and the second edge grid line extend along a first direction, the first edge grid line and the second edge grid line are respectively arranged on both sides of the battery cell along a second direction, the plurality of first grid lines and the plurality of second grid lines are alternately arranged along the first direction, the first grid lines and the second grid lines have opposite polarities, one end of the plurality of first grid lines is connected to the first edge grid line, the other end of the plurality of first grid lines is spaced apart from the second edge grid line, one end of the plurality of second grid lines is spaced apart from the first edge grid line, the other end of the plurality of second grid lines is connected to the second edge grid line, the first grid line comprises a plurality of first grid line segments arranged along the second direction, two adjacent first grid line segments of the plurality of first grid lines adjacent to the first edge grid line are connected to each other to form a first guide grid line, the second grid line comprises a plurality of second grid line segments arranged along the second direction, two adjacent second grid line segments of the plurality of second grid lines adjacent to the second edge grid line are connected to each other to form a second guide grid line, A plurality of first interconnecting structures and a plurality of second interconnecting structures, wherein the plurality of battery cells are electrically connected through the plurality of first interconnecting structures and the plurality of second interconnecting structures, wherein the plurality of first interconnecting structures and the plurality of second interconnecting structures are alternately arranged along the second direction, wherein the first interconnecting structure is disposed between two adjacent first gate line segments of the plurality of first gate lines, and the first interconnecting structure is spaced apart from the ends of the two adjacent first gate line segments, and the first interconnecting structure is electrically connected to the plurality of second gate lines respectively, wherein the second interconnecting structure is disposed between two adjacent second gate line segments of the plurality of second gate lines, and the second interconnecting structure is spaced apart from the ends of the two adjacent second gate line segments, and the second interconnecting structure is electrically connected to the plurality of first gate lines respectively, and the second interconnecting structure adjacent to the first edge gate line is electrically connected to the first guide gate line, and the first interconnecting structure adjacent to the second edge gate line is electrically connected to the second guide gate line.

2. The battery string according to claim 1, characterized in that: The plurality of first interconnection structures include a first edge interconnection structure and a plurality of first intermediate interconnection structures, the first edge interconnection structure is located between the first edge gate line and the plurality of first intermediate interconnection structures, and a first insulating connector is provided between the first edge interconnection structure and the first guide gate line; The plurality of second interconnect structures include a second edge interconnect structure and a plurality of second intermediate interconnect structures, the second edge interconnect structure is located between the second edge grid line and the plurality of second intermediate interconnect structures, and a second insulating connector is provided between the second edge interconnect structure and the second guide grid line.

3. The battery string according to claim 2, characterized in that: The first insulating connector is insulating glue; and / or The second insulating connector is insulating glue.

4. The battery string according to claim 2, characterized in that: A first connection reinforcement member is respectively provided between the first edge interconnection structure and two of the second gate line segments adjacent to the first guide gate line; and / or A second connection reinforcement member is respectively provided between each of the second edge interconnection structures and two of the first gate line segments adjacent to the second guide gate line.

5. The battery string according to claim 4, characterized in that: The first connection reinforcement member and / or the second connection reinforcement member is a solder paste member.

6. The battery string according to claim 1, characterized in that: At least two first adhesive members are provided on a side of each of the first interconnection structures away from the battery sheet; At least two second adhesive members are disposed on a side of each of the second interconnecting structures away from the battery sheet.

7. The battery string according to claim 6, characterized in that: At least two of the first adhesive members are respectively disposed on two outermost sides of the plurality of the first gate lines and the plurality of the second gate lines along the first direction; At least two of the second adhesive members are respectively disposed on two outermost sides of the plurality of the first gate lines and the plurality of the second gate lines along the first direction.

8. The battery string according to claim 6, characterized in that: The first adhesive component and the second adhesive component are adhesive glues respectively.

9. The battery string according to claim 1, characterized in that: Further including: A positioning member is provided on a side of the plurality of first interconnection structural members and the plurality of second interconnection structural members away from the battery sheet.

10. The battery string according to claim 9, characterized in that: The positioning piece is a glue dot, a glue strip or a glue film.

11. The battery string according to claim 1, characterized in that: A third insulating connector is respectively disposed on one end of each of the plurality of first gate line segments close to the first interconnection structure, and the first guide gate lines are insulated from the corresponding first interconnection structure by a fourth insulating connector; and / or A fifth insulating connector is respectively disposed on one end of each of the plurality of second gate line segments close to the second interconnection structure, and the second guide gate lines are insulated from the corresponding second interconnection structure via a sixth insulating connector.

12. The battery string according to claim 11, characterized in that: A third connection reinforcement member is provided between each of the first gate line segments and the corresponding second interconnection structure members, and a fourth connection reinforcement member is provided between each of the second gate line segments and the corresponding first interconnection structure members.

13. The battery string according to claim 12, characterized in that: The third connection reinforcement member and / or the fourth connection reinforcement member are solder paste members.

14. The battery string according to claim 1, characterized in that: There are a plurality of first guide gate lines, the plurality of first guide gate lines are arranged at intervals along the first direction, and a ratio of a distance between two adjacent first guide gate lines to a distance between the first interconnection structure and the second interconnection structure is b3, wherein b3 satisfies: 0.5≤b3≤3; and / or There are multiple second guide gate lines, and the multiple second guide gate lines are arranged at intervals along the first direction. The ratio of the distance between two adjacent second guide gate lines to the distance between the first interconnection structure and the second interconnection structure is b4, wherein b4 satisfies: 0.5≤b4≤3.

15. A photovoltaic module, characterized in that: Comprising a battery string according to any one of claims 1-14.

16. A photovoltaic power generation system, characterized in that: The method comprises a cell string according to any one of claims 1 to 14, or a photovoltaic module according to claim 15.

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