Photovoltaic module and photovoltaic power generation system
By designing parallel and series arrangements of solar cells of different sizes in photovoltaic modules, the jumper wire connection is eliminated, solving the problems of power loss and processing difficulty in photovoltaic modules, and achieving higher power generation capacity and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-03-20
AI Technical Summary
Existing photovoltaic modules suffer from significant power loss and high processing difficulty when connected in battery strings, especially due to the power loss caused by jumpers and the complexity of the processing technology.
The system employs a series structure of multiple battery cells. By designing the first and second battery cells as cells of different sizes and arranging them in parallel and series, jumper connections are eliminated. Current-conducting components and diodes are used to protect current flow, ensuring current consistency and reducing heat loss.
It reduces power loss in photovoltaic modules, improves power generation capacity and production efficiency, reduces processing difficulty, extends service life, and enhances module performance and power generation.
Smart Images
Figure CN224022164U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to photovoltaic technology field especially is related to a photovoltaic module and photovoltaic power generation system. BACKGROUND
[0002] Photovoltaic is the abbreviation of solar photovoltaic power generation system, is a kind of photovoltaic effect of using photovoltaic cell semiconductor material, solar radiation energy is directly converted into a new type of power generation system, there are two ways of independent operation and grid-connected operation.
[0003] In the related art, multiple cutting (for example, cutting two parallel two circuit design) is an effective scheme for improving the power of photovoltaic modules. When connecting battery strings with different layouts and designs in photovoltaic modules, it is usually necessary to pass current through part of the battery pieces by using jumpers when they are shaded. However, the presence of jumpers can cause significant power loss in photovoltaic modules, and the processing difficulty is also higher. SUMMARY
[0004] The utility model aims at at least one of the technical problems existing in the prior art. To this end, one object of the utility model is to provide a photovoltaic module that reduces power loss, improves power, reduces processing difficulty and improves production efficiency.
[0005] Another object of the utility model is to provide a photovoltaic power generation system using the above photovoltaic module.
[0006] According to the photovoltaic module of the first aspect of the utility model, a plurality of battery units are connected in series, and the plurality of battery units include a first battery unit and at least one second battery unit. The length of the first battery unit is the same as the length of the second battery unit. The first battery unit includes two first sub-battery units arranged in a first direction and connected in parallel. The first sub-battery unit includes a plurality of first battery columns arranged in a second direction and connected in series. The first battery column includes a plurality of first battery pieces arranged in the first direction and connected in series. The second battery unit includes two second sub-battery units arranged in the first direction and connected in parallel. The second sub-battery unit includes a plurality of second battery columns arranged in the second direction and connected in parallel. The second battery column includes a plurality of second battery pieces arranged in the first direction and connected in series. The area of the second battery piece is different from the area of the first battery piece.
[0007] According to some embodiments of the utility model, the first sub-battery unit includes M first battery columns, the second sub-battery unit includes M second battery columns, the area of the first battery piece is M times the area of the second battery piece, and M is a natural number greater than or equal to 2.
[0008] According to some embodiments of the present application, the width of the first battery piece is W1, and the length of the first battery piece is L1, wherein the W1 and L1 respectively satisfy: 91mm≤W1≤120mm, and 182mm≤L1≤240mm; and / or,
[0009] The width of the second battery piece is W2, and the length of the second battery piece is L2, wherein the W2 and L2 respectively satisfy: 45.5mm≤W2≤60mm, and 182mm≤L2≤240mm.
[0010] According to some embodiments of the present application, the spacing between two adjacent first battery pieces is greater than the spacing between two adjacent second battery pieces.
[0011] According to some embodiments of the present application, the spacing between two adjacent first battery pieces is D1, wherein the D1 satisfies: -0.5mm≤D1≤1.0mm; and / or, the spacing between two adjacent second battery pieces is D2, wherein the D2 satisfies: -0.5mm≤D2≤1.0mm.
[0012] According to some embodiments of the present application, the photovoltaic module further comprises: a back plate, which is arranged on one side of the thickness direction of the first battery piece, and the width of the back plate at the position opposite to the gap between two adjacent first battery pieces and / or the gap between two adjacent second battery pieces is D3, wherein the D3 satisfies: 2mm≤D3≤5mm.
[0013] According to some embodiments of the present application, the length of the first battery column is the same as the length of the second battery column.
[0014] According to some embodiments of the present application, the photovoltaic module further comprises: a first flow guide, which extends along the second direction, and two first sub-cell units and two second sub-cell units are respectively connected with the first flow guide.
[0015] According to some embodiments of the present application, a plurality of first sub-cell units are symmetrically arranged about the first flow guide; and / or, a plurality of second sub-cell units are symmetrically arranged about the first flow guide.
[0016] According to some embodiments of the present application, the photovoltaic module further comprises: a first diode, which is electrically connected with the first flow guide, and the first diode is reversely connected in parallel with two first sub-cell units symmetrically arranged along the first direction.
[0017] According to some embodiments of the present application, the second battery unit is two, and the first battery unit is located on one side of the two second battery units along the second direction.
[0018] According to some embodiments of the present application, the photovoltaic module further comprises: a plurality of second flow guides, two second sub-battery units on the same side of the first flow guide are connected in series through the second flow guide.
[0019] According to some embodiments of the present application, the photovoltaic module further comprises: a third flow guide, two ends of the third flow guide are electrically connected with the second flow guide and the first flow guide located between the two second battery units; two second diodes, the second diode is electrically connected with the first flow guide, and any one of the two second diodes is reversely connected in parallel with two second sub-battery units symmetrically arranged along the first direction.
[0020] According to some embodiments of the present application, the width of the third flow guide is W, wherein the W satisfies: 3mm≤W≤8mm.
[0021] According to some embodiments of the present application, the photovoltaic module further comprises: a third diode, the third diode is electrically connected with the first flow guide, and the third diode is reversely connected in parallel with two second battery units.
[0022] According to the photovoltaic power generation system of the second aspect of the embodiments of the present application, the photovoltaic module is according to the first aspect of the embodiments of the present application.
[0023] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0024] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
[0025] Figure 1 is a circuit design schematic diagram of the photovoltaic module according to the embodiments of the present application;
[0026] Figure 2 is a circuit design schematic diagram of the photovoltaic module according to another embodiment of the present application;
[0027] Figure 3 is a schematic diagram of the photovoltaic module according to the embodiments of the present application.
[0028] REFERENCE NUMERALS:
[0029] 100, photovoltaic module;
[0030] 1. a battery cell;
[0031] 2. a first battery cell; 21. a first sub battery cell;
[0032] 211. a first battery column; 2111. a first battery piece;
[0033] 3. a second battery cell; 31. a second sub battery cell;
[0034] 311. a second battery column; 3111. a second battery piece;
[0035] 4. a first flow guide; 5. a second flow guide;
[0036] 6. a first diode; 7. a second diode;
[0037] 8. a third flow guide; 9. a third diode. DETAILED DESCRIPTION
[0038] Embodiments of the present application will be described in detail below with reference to the drawings, which are examples described with reference to the drawings, and the following description is made with reference to Figures 1-3 A photovoltaic module 100 according to a first aspect embodiment of the present application is described below.
[0039] As shown in Figure 1 and Figure 3 , the photovoltaic module 100 according to the first aspect embodiment of the present application includes a plurality of battery cells 1.
[0040] Specifically, the plurality of battery cells 1 are connected in series in turn, the plurality of battery cells 1 include a first battery cell 2 and at least one second battery cell 3, the length of the first battery cell 2 is the same as the length of the second battery cell 3, the first battery cell 2 includes two first sub battery cells 21 arranged in parallel along a first direction (such as the up-down direction as shown in Figure 1 , the first sub battery cell 21 includes a plurality of first battery columns 211 arranged in series along a second direction (such as the left-right direction as shown in Figure 1 , the first battery column 211 includes a plurality of first battery pieces 2111 arranged in series along the first direction, the second battery cell 3 includes two second sub battery cells 31 arranged in parallel along the first direction, the second sub battery cell 31 includes a plurality of second battery columns 311 arranged in parallel along the second direction, the second battery column 311 includes a plurality of second battery pieces 3111 arranged in series along the first direction, and the area of the second battery piece 3111 is different from the area of the first battery piece 2111. In the description of the present application, the meaning of "a plurality of" is two or more than two.
[0041] For example, in Figure 1 andFigure 3 In the example of FIG. 1, the first battery unit 2 includes two first sub-battery units 21 arranged in the up-down direction, and the second battery unit 3 includes two second sub-battery units 31 arranged in the up-down direction. Two first battery columns 211 in series in the first sub-battery unit 21 are arranged in the left-right direction, and two second battery columns 311 in parallel in the second sub-battery unit 31 are also arranged in the left-right direction. That is, in the example of FIG. 1, the two first battery columns 211 in series in the first sub-battery unit 21 are connected in parallel with the two second battery columns 311 in parallel in the second sub-battery unit 31. Figure 1 In the example of FIG. 1, the two second battery columns 311 on the left are connected in parallel, and the two first battery columns 211 on the right are connected in series. The length of the first battery unit 2 in the up-down direction is the same as the length of the second battery unit 3 in the up-down direction. In the conventional technology, a photovoltaic module includes a plurality of battery strings in series, each battery string includes two battery columns in parallel, and each battery column includes a plurality of battery pieces in series. A jumper is provided between adjacent two battery strings.
[0042] In this way, compared with the conventional technology, the plurality of first battery columns 211 in the first sub-battery unit 21 are connected in series, so that the current can directly flow between the first sub-battery unit 21 and the second sub-battery unit 31, and a jumper is not needed between the first sub-battery unit 21 and the second sub-battery unit 31, thereby one jumper can be saved, and the power loss caused by the current passing through other conductive members such as the jumper is improved, the power loss of the photovoltaic module 100 is reduced, the power of the photovoltaic module 100 is improved, the power generation capability of the photovoltaic module 100 is improved, and the use performance of the photovoltaic module 100 is improved. Moreover, the process of processing other conductive members is also reduced, thereby the process of connecting the plurality of battery units 1 with other conductive members is reduced, the process difficulty in the production process of the photovoltaic module 100 is reduced, and the production efficiency of the photovoltaic module 100 is improved. In addition, the first battery piece 2111 and the second battery piece 3111 are cut from a complete battery piece to different areas, thereby the current of the first battery piece 2111 and the second battery piece 3111 is reduced, the heat loss of the battery unit 1 is reduced, and the power of the photovoltaic module 100 is improved. In addition, the length of the first battery unit 2 is the same as the length of the second battery unit 3, which effectively ensures that the circuit (i.e. the current and the voltage) of the first battery unit 2 and the second battery unit 3 in the photovoltaic module 100 is consistent, the first battery unit 2 and the second battery unit 3 are matched when connected in series, and the use performance of the photovoltaic module 100 is ensured.
[0043] According to the photovoltaic module 100 of the present application, other conductive members (such as a jumper) are saved, thereby the power loss of the photovoltaic module 100 is reduced, the power of the photovoltaic module 100 is improved, the power generation capability of the photovoltaic module 100 is improved, and the use performance of the photovoltaic module 100 is improved. In addition, the process difficulty in the production process of the photovoltaic module 100 is also reduced, and the production efficiency of the photovoltaic module 100 is improved.
[0044] According to some embodiments of the present application, referring to Figure 1 , the first sub-cell unit 21 comprises M first battery columns 211, the second sub-cell unit 31 comprises M second battery columns 311, the area of the first battery piece 2111 is M times of the area of the second battery piece 3111, and M is a natural number greater than or equal to 2.
[0045] For example, when M is equal to 2, as shown in Figure 1 , the first sub-cell unit 21 comprises two first battery columns 211, the second sub-cell unit 31 comprises two second battery columns 311, the area of the first battery piece 2111 is twice of the area of the second battery piece 3111, the two first battery columns 211 are connected in series, and the two second battery columns 311 are connected in parallel. When M is equal to 3 (not shown in the figure), the first sub-cell unit 21 comprises three first battery columns 211, the second sub-cell unit 31 comprises three second battery columns 311, the area of the first battery piece 2111 is three times of the area of the second battery piece 3111, the three first battery columns 211 are connected in series, and the three second battery columns 311 are connected in parallel. However, the value of M can be set according to actual use to meet actual needs. In this way, the first sub-cell unit 21 and the second sub-cell unit 31 can be flexibly set according to actual use, thereby improving the flexibility of the photovoltaic module 100 and the adaptability of the photovoltaic module 100.
[0046] According to some embodiments of the present application, referring to Figure 3 , the width of the first battery piece 2111 is W1, and the length of the first battery piece 2111 is L1, wherein W1 and L1 respectively satisfy: 91mm≤W1≤120mm, 182mm≤L1≤240mm; and / or, the width of the second battery piece 3111 is W2, and the length of the second battery piece 3111 is L2, wherein W2 and L2 respectively satisfy: 45.5mm≤W2≤60mm, 182mm≤L2≤240mm.
[0047] For example, the arrangement of the first cell piece 2111 and the second cell piece 3111 includes the following cases: first, the width of the first cell piece 2111 is W1, and the length of the first cell piece 2111 is L1, wherein W1 and L1 respectively satisfy: 91mm≤W1≤120mm, 182mm≤L1≤240mm. Second, the width of the second cell piece 3111 is W2, and the length of the second cell piece 3111 is L2, wherein W2 and L2 respectively satisfy: 45.5mm≤W2≤60mm, 182mm≤L2≤240mm. Third, the width of the first cell piece 2111 is W1, the length of the first cell piece 2111 is L1, the width of the second cell piece 3111 is W2, and the length of the second cell piece 3111 is L2, wherein W1, L1, W2, and L2 respectively satisfy: 91mm≤W1≤120mm, 182mm≤L1≤240mm, 45.5mm≤W2≤60mm, 182mm≤L2≤240mm.
[0048] In this way, the size of the first cell piece 2111 and the size of the second cell piece 3111 are reasonably arranged, easy to control and obtain, thereby improving the production efficiency of the first cell piece 2111 and the second cell piece 3111, thereby improving the production efficiency of the battery cell 1, and further improving the production efficiency of the photovoltaic module 100.
[0049] According to some embodiments of the present application, the distance between the adjacent two first cell pieces 2111 is greater than the distance between the adjacent two second cell pieces 3111. For example, the distance between the adjacent two first cell pieces 2111 in the up-down direction is greater than the distance between the adjacent two second cell pieces 3111. In this way, the arrangement difficulty of the plurality of first cell pieces 2111 is reduced, thereby improving the production efficiency of the first cell row 211, thereby improving the production efficiency of the photovoltaic module 100.
[0050] According to some embodiments of the present application, the distance between the adjacent two first cell pieces 2111 is D1, wherein D1 satisfies: -0.5mm≤D1≤1.0mm.
[0051] For example, in the case of the first cell piece 2111 and the second cell piece 3111 arranged as shown in FIG. 2, the distance between the adjacent two first cell pieces 2111 is D1, and the distance between the adjacent two second cell pieces 3111 is D2, wherein D1 and D2 respectively satisfy: -0.5mm≤D1≤1.0mm, 0.5mm≤D2≤1.0mm. Figure 3In the example, the spacing between two adjacent first solar cells 2111 arranged in the left-right direction is D1, and the spacing between two adjacent first solar cells 2111 arranged in the up-down direction is also D1. When the spacing between two adjacent first solar cells 2111 in the first solar cell column 211 is less than -0.5mm, the overlapping area between the two adjacent first solar cells 2111 is large, reducing the power generation of the first solar cell column 211. When the spacing between two adjacent first solar cells 2111 in the first solar cell column 211 is greater than 1.0mm, the interval between the two adjacent first solar cells 2111 is large, increasing the difficulty of arranging multiple second solar cells 3111 and multiple first solar cells 2111. Therefore, by setting the spacing D1 between two adjacent first cells 2111 in the first battery column 211 to satisfy -0.5mm ≤ D1 ≤ 1.0mm, the spacing between two adjacent first cells 2111 is reasonably set, reducing the overlap area between two adjacent first cells 2111, thereby reducing the shading area and increasing the power generation of the first battery column 211. In addition, reducing the spacing between two adjacent first cells 2111 reduces the difficulty of arranging multiple second cells 3111 and multiple first cells 2111, thereby improving the production efficiency of the photovoltaic module 100.
[0052] According to some other embodiments of the present invention, the distance between two adjacent second battery cells 3111 is D2, wherein D2 satisfies: -0.5mm≤D2≤1.0mm.
[0053] For example, in Figure 3 In the example, the spacing between two adjacent second battery cells 3111 arranged in the left-right direction is D2, and the spacing between two adjacent second battery cells 3111 arranged in the up-down direction is also D2. When the spacing between two adjacent second battery cells 3111 in the second battery column 311 is less than -0.5mm, the overlapping area between two adjacent second battery cells 3111 is large, reducing the power generation of the second battery string 13. When the spacing between two adjacent second battery cells 3111 in the second battery column 311 is greater than 1.0mm, the interval between two adjacent second battery cells 3111 is large, increasing the difficulty of arranging multiple second battery cells 3111 and multiple first battery cells 2111. Therefore, by setting the spacing D2 between two adjacent second cells 3111 in the second battery column 311 to satisfy -0.5mm ≤ D2 ≤ 1.0mm, the spacing between two adjacent second cells 3111 is reasonably set, reducing the overlap area between two adjacent second cells 3111, thereby reducing the shading area and increasing the power generation of the second battery column 311. In addition, reducing the spacing between two adjacent second cells 3111 reduces the difficulty of arranging multiple second cells 3111 and multiple first cells 2111, thereby improving the production efficiency of the photovoltaic module 100.
[0054] According to still some embodiments of the present utility model, the interval between the two adjacent first battery pieces 2111 is D1, and the interval between the two adjacent second battery pieces 3111 is D2, wherein D1 and D2 respectively satisfy: -0.5mm≤D1≤1.0mm, -0.5mm≤D2≤1.0mm. Thus, the interval between the two adjacent first battery pieces 2111 is set reasonably, and the interval between the two adjacent second battery pieces 3111 is set reasonably, which reduces the overlapping area between the two adjacent first battery pieces 2111 in the first battery column 211 and the overlapping area between the two adjacent second battery pieces 3111 in the second battery column 311, thereby reducing the shielding area and improving the power generation of the plurality of battery units 1. In addition, the interval between the two adjacent first battery pieces 2111 in the first battery column 211 is reduced, and the interval between the two adjacent second battery pieces 3111 in the second battery column 311 is reduced, which reduces the arrangement difficulty of the plurality of second battery pieces 3111 and the plurality of first battery pieces 2111, thereby improving the production efficiency of the photovoltaic module 100.
[0055] According to some embodiments of the present utility model, the photovoltaic module 100 further comprises a back plate (not shown in the figure), which is arranged on one side of the first battery piece 2111 in the thickness direction, and the width of the back plate at the position opposite to the gap between the two adjacent first battery pieces 2111 and / or the gap between the two adjacent second battery pieces 3111 is D3, wherein D3 satisfies: 2mm≤D3≤5mm.
[0056] For example, the back plate is arranged at the rear side of the first battery piece 2111. The arrangement of the back plate includes the following cases: first, the width of the back plate at the position opposite to the gap between the two adjacent first battery pieces 2111 is D3, wherein D3 satisfies: 2mm≤D3≤5mm. Second, the width of the back plate at the position opposite to the gap between the two adjacent second battery pieces 3111 is D3, wherein D3 satisfies: 2mm≤D3≤5mm. Third, the width of the back plate at the position opposite to the gap between the two adjacent first battery pieces 2111 and the gap between the two adjacent second battery pieces 3111 is D3, wherein D3 satisfies: 2mm≤D3≤5mm. In this way, the gap between the two adjacent first battery pieces 2111 and the gap between the two adjacent second battery pieces 3111 are shielded, and the light transmission is avoided, so as to facilitate the normal use of the photovoltaic module 100 for a long time.
[0057] According to some embodiments of the present utility model, referring to Figure 1 and Figure 3 , the length of the first battery column 211 is the same as the length of the second battery column 311. For example, in Figure 1 and Figure 3In the example, the length of the first battery column 211 along the vertical direction is the same as the length of the second battery column 311 along the vertical direction. This arrangement further ensures that the lengths of the first battery unit 2 and the second battery unit 3 are the same, that the first battery unit 2 and the second battery unit 3 are compatible, and that the circuit remains consistent, facilitating the normal operation of the photovoltaic module 100 for a long time. Furthermore, it also ensures that the current and voltage of the first battery unit 2 are consistent with those of the second battery unit 3, thus eliminating the need for other conductive components (such as jumpers) when connecting the first battery unit 2 and the second battery unit 3, thereby reducing the power loss of the photovoltaic module 100.
[0058] According to some embodiments of this utility model, refer to Figure 3 The number of second battery cells 3111 in each second battery column 311 is twice the number of first battery cells 2111 in each first battery column 211. The first battery cell 2111 is a fraction of a complete battery cell cut into N parts, and the second battery cell 3111 is a fraction of a complete battery cell cut into 2N parts, where N is a natural number greater than or equal to 2. For example, in... Figure 3 In the example, the first battery cell 2111 and the second battery cell 3111 are made by cutting a complete battery cell of the same size into smaller battery cells of different sizes. For example, when the lengths (e.g., the dimensions along the left-right direction) of the first battery cell 2111 and the second battery cell 3111 are the same, the width of the second battery cell 3111 (i.e., the width along the right-right direction) is different. Figure 1 The width in the vertical direction is the width of the first solar cell 2111 (i.e., the width of the first solar cell 2111 along the vertical direction). Figure 1 The width of the first battery column 211 is half the width of the second battery column 311 (the length of the first battery column 211 along the vertical direction). This effectively ensures that the total length of the first battery column 211 (i.e., the length of the first battery column 211 along the vertical direction) is the same as the total length of the second battery column 311 (i.e., the length of the second battery column 311 along the vertical direction), thereby further ensuring the uniformity of the lengths of the first sub-cell 21 and the second sub-cell 31. It also makes the effective utilization area of the first battery unit 21 the same as that of the second battery unit 31, making the first sub-cell 21 and the second sub-cell 31 compatible, which is beneficial to the performance improvement and normal use of the photovoltaic module. In addition, it also makes the current and voltage of the first sub-cell 21 consistent with the current and voltage of the second sub-cell 31, so that when the first sub-cell 21 and the second sub-cell 31 are connected, other conductive parts (such as jumpers) can be eliminated, and the power of the photovoltaic module 100 is significantly reduced. In addition, cutting the complete cell will reduce the current and the thermal loss of the photovoltaic module 100, which also helps to increase the power of the photovoltaic module 100.
[0059] According to some embodiments of this utility model, refer to Figure 3The first battery piece 2111 is a half battery piece cut from a complete battery piece, and the second battery piece 3111 is a quarter battery piece cut from a complete battery piece. For example, the first battery piece 2111 is a half battery piece cut from a complete battery piece, the second battery piece 3111 is a quarter battery piece cut from a complete battery piece, the current of the first battery piece 2111 is twice the current of the second battery piece 3111, and the area of the first battery piece 2111 is twice the area of the second battery piece 3111. In this way, the complete battery piece is easy to cut into the first battery piece 2111, which reduces the difficulty of forming the first battery piece 2111, thereby improving the production efficiency of the first battery piece 2111, that is, improving the production efficiency of the first battery row 211. Moreover, in the limited length of the first battery row 211, the distance between the two adjacent first battery pieces 2111 is large, which is easy to arrange the first battery piece 2111 and easy to produce the first battery string. In addition, the second battery piece 3111 is a quarter of the complete battery piece, and the width of the second battery piece 3111 is small, which effectively reduces the current of the second battery piece 3111, thereby reducing the thermal loss of the second battery piece 3111, and further improving the power.
[0060] According to some embodiments of the present application, referring to Figure 1 , the photovoltaic module 100 further comprises a first flow guide 4, the first flow guide 4 extends along a second direction (such as the left-right direction shown in Figure 1 , two first sub-cell units 21 and two second sub-cell units 31 are connected to the first flow guide 4. For example, in the example of Figure 1 , the first flow guide 4 is located at the center position of the photovoltaic module 100, the two first sub-cell units 21 or the two second sub-cell units 31 opposite in the up-down direction are connected in parallel through the first flow guide 4, and the first sub-cell unit 21 and the second sub-cell unit 31 adjacent in the left-right direction are connected in series through the first flow guide 4. A plurality of cell units 1 are connected to the first flow guide 4. In this way, the two first sub-cell units 21 in the first cell unit 2 share the first flow guide 4, and the two second sub-cell units 31 in the second cell unit 3 share the first flow guide 4, which is convenient for connection and improves the installation effect. Moreover, the utilization rate of the first bus bar 2 is also improved.
[0061] According to some embodiments of the present application, referring to Figure 1, two first sub-cell units 21 are symmetrically arranged about the first flow guide 4; and / or, two second sub-cell units 31 are symmetrically arranged about the first flow guide 4. For example, the arrangement of the plurality of first sub-cell units 21 and the plurality of second sub-cell units 31 includes the following cases: first, the plurality of first sub-cell units 21 are symmetrically arranged about the first flow guide 4. Second, the plurality of second sub-cell units 31 are symmetrically arranged about the first flow guide 4. Third, the plurality of first sub-cell units 21 are symmetrically arranged about the first flow guide 4. Meanwhile, the plurality of second sub-cell units 31 are symmetrically arranged about the first flow guide 4. That is, two first sub-cell units 21 in the up-down direction are symmetric about the first flow guide 4, and two second sub-cell units 31 in the up-down direction are symmetric about the first flow guide 4. In this way, the arrangement of the plurality of first cell pieces 2111 in the two first sub-cell units 21 opposite in the up-down direction is similar, and the arrangement of the plurality of second cell pieces 3111 in the two second sub-cell units 31 opposite in the up-down direction is similar, thereby reducing the difficulty of the production process of the photovoltaic module 100 and improving the production efficiency of the photovoltaic module 100. When the cell piece on one side of the first flow guide 4 is shielded, the cell piece on the other side of the first flow guide 4 can still be normally used, thereby maintaining a high current collection and conversion capability of the photovoltaic module 100, and greatly reducing the current loss of the photovoltaic module 100.
[0062] According to some embodiments of the present application, referring to Figure 1 The photovoltaic module 100 further comprises a first diode 6, the first diode 6 is electrically connected with the first flow guide 4, and the first diode 6 is reversely connected in parallel with two first sub-cell units 21 symmetrically arranged in the first direction (i.e. the up-down direction). For example, in Figure 1In the example, the first diode 6 is reversely connected in parallel between two first sub-cell units 21 in the first battery unit 2 arranged symmetrically along the up-down direction. In this way, the first diode 6 is used to protect the first sub-cell unit 21, and the current flows through the first battery pieces 2111 in the two first battery columns 211 in turn, avoiding the current flowing out along the first current guide 4 directly when the current flows through the first sub-cell unit 21, so that the first sub-cell unit 21 can be used normally for a long time. In addition, the first diode 6 protects two first sub-cell units 21 in the first battery unit 2 respectively, that is, the first diode 6 can protect two first sub-cell units 21 opposite along the up-down direction at the same time, and when the first battery piece 2111 in one of the first sub-cell units 21 is damaged, the current can flow to the second sub-cell unit 31 through the first diode 6, and the first sub-cell unit 21 located on the lower side of the first current guide 4 can be used normally, so as to ensure the normal collection and confluence of the current, so as to ensure that the plurality of second sub-cell units 31 and the other first sub-cell unit 21 can be used normally, prolong the service life of the photovoltaic module 100, and improve the use performance and photoelectric conversion amount of the photovoltaic module 100. Wherein, the photovoltaic module 100 further comprises a first junction box (not shown in the figure), the first junction box is arranged on the back of the photovoltaic module 100, the first junction box is opposite to the first current guide 4, and the first diode 6 is arranged in the first junction box.
[0063] According to some embodiments of the present application, referring to Figure 1 , the second battery unit 3 is two, and the first battery unit 2 is located on one side of the two second battery units 3 along the second direction. For example, in Figure 1 , the two second battery units 3 are arranged along the left-right direction, the first battery unit 2 is located on the right side of the two second battery units 3, and the plurality of second battery pieces 3111 in the second sub-cell unit 31 are arranged in turn along the up-down direction. In this way, the first battery unit 2 is arranged on one side of the two second battery units 3, which facilitates the connection of the two second battery units 3 in series and then in series with the first battery unit 2, avoiding connection errors when connecting the plurality of battery units 1, thereby facilitating the production of the photovoltaic module 100. In addition, the second battery unit 3 is provided as two, which not only improves the power generation amount of the photovoltaic module 100, but also ensures that the thermal loss of the photovoltaic module 100 is low, thereby improving the use performance of the photovoltaic module 100. In addition, the arrangement of the first battery unit 2 and the second battery unit 3 is reasonable, which improves the surface utilization rate of the photovoltaic module 100 and improves the power generation amount of the photovoltaic module 100.
[0064] According to some embodiments of the present application, referring to Figure 3 and Figure 1 , the photovoltaic module 100 further comprises a plurality of second current guides 5, and the two second sub-cell units 31 located on the same side of the first current guide 4 are connected in series through the second current guide 5. For example, inFigure 3 and Figure 1 In the example, there are two second guide members 5. The upper ends of the two second sub-battery units 31 located on the upper side of the first guide member 4 are connected through one of the second guide members 5, and the lower ends of the two second sub-battery units 31 located on the lower side of the second guide member 5 are connected through the other second guide member 5.
[0065] With this configuration, the second current guide 5 can connect two adjacent second sub-cell units 31 arranged in the left-right direction in series, allowing current to flow between the two second sub-cell units 31, thus facilitating the output of current from the photovoltaic module 100 for subsequent use. Furthermore, through the cooperation of the first current guide 4 and the second current guide 5, current from multiple cell units 1 can be output to enable the use of the photovoltaic module 100.
[0066] According to some embodiments of this utility model, refer to Figure 1 The photovoltaic module 100 also includes a third current guide 8 and two second diodes 7. The two ends of the third current guide 8 are electrically connected to the second current guide 5 and the first current guide 4 located between the two second battery cells 3, respectively. The second diodes 7 are electrically connected to the first current guide 4. Either of the two second diodes 7 is connected in reverse parallel to two second sub-battery cells 31 that are symmetrically arranged along the first direction (i.e., the up-down direction).
[0067] For example, in Figure 1 In the example, one end of the third current guide 8 is electrically connected to the second current guide 5, and the other end of the third current guide 8 is electrically connected to the first current guide 4 located between the two second battery cells 3 in the left-right direction. One of the two second diodes 7 is connected in reverse parallel between the two second sub-battery cells 31 symmetrically arranged in the up-down direction on the left side, and the aforementioned second diode 7 is also connected in reverse parallel between the third current guide 8 arranged in the left-right direction and the left second battery cell 3. The other of the two second diodes 7 is connected in reverse parallel between the two second sub-battery cells 31 symmetrically arranged in the up-down direction on the right side, and the aforementioned second diode 7 is also connected in reverse parallel between the third current guide 8 arranged in the left-right direction and the right second battery cell 3.
[0068] The photovoltaic module 100 includes a second junction box (not shown in the figure). The other end of the third current guide 8 is connected to the second junction box, which is equipped with a second diode 7. Both second diodes 7 are installed inside the second junction box. The second junction box is located on the back of the photovoltaic module 100, and its projection is onto the first current guide 4 and the third current guide 8. That is, in Figure 1In the example shown in FIG. 1, the left diode 7 of the two diodes 7 is used to protect the two second sub-cells 31 on the left side of the first flow guide 4, and the right diode 7 of the two diodes 7 is used to protect the two second sub-cells 31 on the right side of the first flow guide 4. Figure 1 In the example shown in FIG. 1, the left diode 7 of the two diodes 7 is used to protect the two second sub-cells 31 on the left side of the first flow guide 4, and the right diode 7 of the two diodes 7 is used to protect the two second sub-cells 31 on the right side of the first flow guide 4.
[0069] The following describes the flow direction of the current in the process of use, taking the first sub-cell 21 and the two second sub-cells 31 on the upper side of the first flow guide 4 in the photovoltaic module 100 as an example. When the photovoltaic module 100 is in normal use, the current flow path on the upper side of the first flow guide 4 in the photovoltaic module 100 is symmetrical to the current flow path on the lower side of the first flow guide 4. When the first cell 2111 or the second cell 3111 on the upper side of the first flow guide 4 in the photovoltaic module 100 is damaged, the first sub-cell 21 and the two second sub-cells 31 on the lower side of the first flow guide 4 in the photovoltaic module 100 can be normally used. The third flow guide 8 and the two diodes 7 are provided on the photovoltaic module 100, and the photovoltaic module 100 is described by way of an exemplary embodiment.
[0070] The third flow guide 8 and the two diodes 7 are provided on the photovoltaic module 100, and the photovoltaic module 100 is described by way of an exemplary embodiment. Figure 1 When the photovoltaic module 100 is in normal use, the current flow path is as follows: after the current flows out from the positive electrode, it flows to the left second sub-cell 31 along the first flow guide, flows upward, then flows into the right second sub-cell 31 along the second flow guide 5, flows downward, then flows to the left first cell column 211 in the first sub-cell 21 and the right first cell column 211 in the first sub-cell 21 along the first flow guide 4 in turn, and then flows to the negative electrode along the first flow guide 4.
[0071] When one second cell 3111 in the photovoltaic module 100 is damaged (for example, the second cell 3111 in the dashed line frame shown by the arrow A in FIG. 1 is damaged), as shown in FIG. 2, the current flow path is as follows: after the current flows out from the positive electrode, it flows to the left second sub-cell 31 along the first flow guide, flows upward, then flows into the right second sub-cell 31 along the second flow guide 5, flows downward, then flows to the left first cell column 211 in the first sub-cell 21 and the right first cell column 211 in the first sub-cell 21 along the first flow guide 4 in turn, and then flows to the negative electrode along the first flow guide 4. Figure 1 Figure 2 As shown, the current flow path when one of the second cell pieces 3111 is damaged is as follows: the current flows from the positive pole, along the first current guide 4, through one of the second diodes 7, then along the third current guide 8 and the second current guide 5 in turn, flows to the right second sub-cell unit 31, flows downward, then along the first current guide 4 in turn flows to the left first cell row 211 in the first sub-cell unit 21 and the right first cell row 211 in the first sub-cell unit 21, and then along the first current guide 4 flows to the negative pole.
[0072] In this way, the two second diodes 7 protect the two second sub-cell units 31, when one of the second cell pieces 3111 in one of the second sub-cell units 31 is damaged, the other second sub-cell unit 31 can still be used normally along the third bus bar, thereby prolonging the service life of the photovoltaic module 100. In addition, the second diode 7 also protects the two second sub-cell units 31 on the lower side of the first bus bar in the photovoltaic module 100, thereby improving the use performance of the photovoltaic module 100. When the number of the first cell pieces 2111 and the second cell pieces 3111 is small, or the hot spot risk of the photovoltaic module 100 is low, the third bus bar and only one second diode 7 between the two second sub-cell units 31 can be removed.
[0073] According to some embodiments of the present application, the width of the third current guide 8 is W, wherein W satisfies: 3mm≤W≤8mm. For example, in the example shown in Figure 2 , the width of the third current guide 8 along the left-right direction is W. When the width of the third current guide 8 is less than 3mm, the resistance of the third current guide 8 is large, thereby reducing the conductivity of the third current guide 8, and affecting use. When the width of the third current guide 8 is greater than 8mm, the width of the third current guide 8 is large, thereby increasing the occupied area of the third current guide 8, increasing the difficulty of arranging the plurality of second cell pieces 3111 and the plurality of first cell pieces 2111 along the left-right direction, and reducing the production efficiency. Therefore, by setting the width W of the third current guide 8 to satisfy: 3mm≤W≤8mm, the third current guide 8 is reasonably arranged, the resistance of the third current guide 8 is reduced, the conductivity of the third current guide 8 is improved, and use is facilitated. In addition, the difficulty of arranging the plurality of second cell pieces 3111 and the plurality of first cell pieces 2111 along the left-right direction is also reduced, and the production efficiency is improved.
[0074] According to some other embodiments of the present application, referring to Figure 2 , the photovoltaic module 100 further comprises a third diode 9, the third diode 9 is electrically connected with the first current guide 4, and the third diode 9 is connected in reverse parallel with the two second cell units 3.
[0075] For example, in Figure 2In the example, the first diode 6 is connected in reverse parallel between the two first battery columns 211 in the first battery cell 2, and the third diode 9 is connected in reverse parallel between two adjacent second battery cells 3. The current flows from the positive terminal to the negative terminal within the photovoltaic module 100. The following description uses the first sub-battery cell 21 and two second sub-battery cells 31 on the upper side of the first current guide 4 in the photovoltaic module 100 as examples to illustrate the direction of current flow. When the photovoltaic module 100 is in normal use, the current flow paths on the upper and lower sides of the first current guide 4 are symmetrical about the first current guide 4.
[0076] The photovoltaic module 100 is equipped with a third diode 9, as shown in the reference. Figure 2 The diagram illustrates the current flow path during normal use of the photovoltaic module 100. The current starts from the positive electrode, flows along the first current guide 4 to the second sub-cell cell 31 on the left, flows upward, then flows along the second current guide 5 into the second sub-cell cell 31 on the right, flows downward, and then flows along the first current guide 4 to the first cell column 211 on the left and the first cell column 211 on the right in the first sub-cell cell 21 ...
[0077] In the photovoltaic module 100, a second cell 3111 on the upper side of the first current guide 4 is damaged (e.g. Figure 2 When the second battery cell 3111 (circled by the dashed box indicated by arrow B) is damaged, refer to... Figure 2 When one of the second solar cells 3111 is damaged, the current flow path is as follows: Starting from the positive electrode, the current flows directly along the first guide 4 to the rightmost second cell column 311 in the left second sub-cell unit 31, flowing upwards. Then, it flows along the second guide 5 into the rightmost second sub-cell unit 31, flowing downwards. Subsequently, it flows along the first guide 4 sequentially to the leftmost first cell column 211 and the rightmost first cell column 211 in the first sub-cell unit 21, and then along the first guide 4 to the negative electrode. The current in the two second sub-cell units 31 and the first sub-cell unit 21 below the first guide 4 in the photovoltaic module 100 flows normally.
[0078] In the photovoltaic module 100, one second cell 3111 in each of the two second cell strings 13 of the second sub-cell unit 31 on the upper side of the first current guide 4 is damaged (e.g. Figure 2 When the two second battery cells 3111 indicated by the dashed box (pointed to by arrow C) are damaged, the two second battery columns 311 in the right-side second sub-cell unit 31 are connected in series. (Refer to...) Figure 1When the current flow path of the two second battery pieces 1311 is damaged, the current flows from the positive electrode, through the third diode 9 along the first flow member 4, then flows to the left second battery column 311 in the right second sub battery unit 31, the right second battery column 311 in the right second sub battery unit 31, then flows to the left first battery column 211 in the first sub battery unit 21 and the right first battery column 211 in the first sub battery unit 21 along the first flow member 4, and then flows to the negative electrode along the first flow member 4. The current of the two second sub battery units 31 and the first sub battery unit 21 on the lower side of the photovoltaic module 100 flows normally.
[0079] In this way, the third diode 9 protects the two second sub battery units 31, and the third diode 9 also protects the two second battery units 3. On the same side of the first flow member 4, when the second battery piece 1311 in one of the second sub battery units 31 is damaged, the other second sub battery unit 31 can still be used normally. When the second battery piece 1311 in one of the two second sub battery units 31 is damaged, the other second sub battery unit 31 can still be used normally, extending the service life of the photovoltaic module 100. In addition, the two second battery units 3 are protected by one third diode 9, reducing the use of the third diode 9 and the installation difficulty of the photovoltaic module 100, and improving the production efficiency. The photovoltaic module 100 further comprises a third junction box (not shown in the figure), which is arranged on the back of the photovoltaic module 100, and the third diode 9 is arranged in the third junction box. In combination Figure 2 , the third diode 9 is provided with one, and the third diode 9 is arranged in the third junction box, and the third diode 9 simultaneously protects a total of four second sub battery units 31 on the upper and lower sides of the first flow member 4.
[0080] According to some embodiments of the present application, the number of first battery pieces 2111 in each first battery column 211 is N1, wherein N1 satisfies: 8≤N1≤12; and / or, the number of second battery pieces 3111 in each second battery column 311 is N2, wherein N2 satisfies: 16≤N2≤24. For example, the arrangement of the first battery column 211 and the second battery column 311 includes the following cases: first, the number of first battery pieces 2111 in each first battery column 211 is N1, wherein N1 satisfies: 8≤N1≤12. Second, the number of second battery pieces 3111 in each second battery column 311 is N2, wherein N2 satisfies: 16≤N2≤24. Third, the number of first battery pieces 2111 in each first battery column 211 is N1, and the number of second battery pieces 3111 in each second battery column 311 is N2, wherein N1 and N2 respectively satisfy: 8≤N1≤12, 16≤N2≤24.
[0081] In this way, the number of first battery pieces 2111 in each first battery column 211 and the number of second battery pieces 3111 in each second battery column 311 are reasonably arranged, thereby reasonably arranging the length of the photovoltaic module 100 in the up-down direction, improving the power generation of the photovoltaic module 100, and reducing the production difficulty of the photovoltaic module 100, thereby improving the production efficiency of the photovoltaic module 100.
[0082] According to some embodiments of the present application, the sum of the number of a plurality of second battery pieces 3111 is four times the sum of the number of a plurality of first battery pieces 2111. For example, in the photovoltaic module 100, the sum of the number of a plurality of second battery pieces 3111 is four times the sum of the number of a plurality of first battery pieces 2111, thereby matching the circuit parameters of the two second battery units 3 and the circuit parameters of the first battery unit 2 in the photovoltaic module 100, facilitating subsequent use.
[0083] The embodiments of the present application will be described in detail below. It should be noted that the embodiments described below are exemplary and are used to explain the present application, and cannot be understood as limiting the present application. The battery of the present application is described through exemplary specific embodiments.
[0084] Embodiment 1
[0085] In combination , the photovoltaic module 100 comprises:
[0086] three battery units 1, the three battery units 1 are sequentially connected in series along the second direction (i.e. the left-right direction), the three battery units 1 include a first battery unit 2 and two second battery units 3, the first battery unit 2 is located at the right side of the two second battery units 3 along the left-right direction, and the length of the first battery unit 2 is the same as the length of the second battery unit 3 along the first direction (i.e. the up-down direction).
[0087] The first battery unit 2 includes two first sub-battery units 21 arranged in the up-down direction and connected in parallel, the first sub-battery unit 21 includes two first battery columns 211 arranged in the left-right direction and connected in series, and the first battery column 211 includes eleven first battery pieces 2111 arranged in the up-down direction and connected in series. Each second battery unit 3 includes two second sub-battery units 31 arranged in the up-down direction and connected in parallel, the second sub-battery unit 31 includes two second battery columns 311 arranged in the left-right direction and connected in parallel, and the second battery column 311 includes twenty-two second battery pieces 3111 arranged in the up-down direction and connected in series. The length of the first battery column 211 in the up-down direction is the same as the length of the second battery column 311. The area of the second battery piece 3111 is different from the area of the first battery piece 2111, the area of the first battery piece 2111 is twice the area of the second battery piece 3111, each first battery piece 2111 is a half battery piece cut from a complete battery piece, and each second battery piece 3111 is a quarter battery piece cut from a complete battery piece. The sum of the number of the plurality of second battery pieces 3111 in the photovoltaic module 100 is four times the sum of the number of the plurality of first battery pieces 2111.
[0088] The photovoltaic module 100 further includes a first flow guide 4 and a first diode 6, the first flow guide 4 extends in the left-right direction, the two first sub-battery units 21 in the up-down direction are symmetrically arranged about the first flow guide 4, and the two first sub-battery units 21 are respectively electrically connected with the first flow guide 4. The two second sub-battery units 31 in the up-down direction are symmetrically arranged about the first flow guide 4, and the two second sub-battery units 31 are respectively electrically connected with the first flow guide 4. The first diode 6 is electrically connected with the first flow guide 4, and the first diode 6 is reversely connected in parallel with the two first sub-battery units 21 symmetrically arranged in the up-down direction.
[0089] The photovoltaic module 100 further comprises two second conductive members 5, two third conductive members 8 and two second diodes 7. The two second conductive members 5 are located at the ends of the second sub-cell units 31 away from the center of the photovoltaic module 100, and the two second conductive members 5 are connected in series with the two second sub-cell units 31 on the same side of the first conductive member 4 along the left-right direction. The two third conductive members 8 are arranged on the upper and lower sides of the first conductive member 4 respectively, and each of the two third conductive members 8 is located between the two adjacent second sub-cell units 31 along the left-right direction. One end of the third conductive member 8 is electrically connected with the second conductive member 5, and the other end of the third conductive member 8 is electrically connected with the first conductive member 4 between the two second sub-cell units 31 along the left-right direction. The two second diodes 7 are electrically connected with the first conductive member 4 respectively. The left second diode 7 is connected in anti-parallel with the two second sub-cell units 31 arranged symmetrically along the up-down direction on the left side, and the left second diode 7 is connected in anti-parallel with the second sub-cell unit 31 and the third conductive member 8 arranged along the left-right direction on the left side. The right second diode 7 is connected in anti-parallel with the two second sub-cell units 31 arranged symmetrically along the up-down direction on the right side, and the right second diode 7 is connected in anti-parallel with the second sub-cell unit 31 and the third conductive member 8 arranged along the left-right direction on the right side.
[0090] Embodiment 2
[0091] In combination The main difference between the photovoltaic module 100 of the embodiment 1 and the embodiment 2 is that the photovoltaic module 100 of the embodiment 2 further comprises a third diode 9, and the photovoltaic module 100 of the embodiment 2 does not comprise the two third conductive members 8 and the two second diodes 7. The third diode 9 is electrically connected with the first conductive member 4, and the third diode 9 is connected in anti-parallel with the four second sub-cell units 31.
[0092] The photovoltaic module 100 of the embodiment 1 at least saves two jumpers relative to the conventional module, and the photovoltaic module 100 of the embodiment 2 at least saves four jumpers, so that the power loss caused by the current passing through the jumpers is improved, the power loss of the photovoltaic module 100 is reduced, and the power of the photovoltaic module 100 is improved. Moreover, the production and installation of the jumpers are also saved, and the production efficiency of the photovoltaic module 100 is improved.
[0093] The photovoltaic power generation system (not shown in the figure) according to the second aspect of the present application comprises the photovoltaic module 100 according to the first aspect of the present application.
[0094] The photovoltaic power generation system according to the present application improves the power of the photovoltaic power generation system and the production efficiency of the photovoltaic power generation system by using the photovoltaic module 100.
[0095] The other configurations and operations of the photovoltaic module and the photovoltaic power generation system according to the embodiments of the present application are known to those skilled in the art, and will not be described in detail here.
[0096] In the description of the utility model, need understanding is, the orientation or position relation that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" indicate is based on the orientation or position relation shown in the drawing, just is for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated with a particular orientation, therefore can not be understood as the restriction of the utility model.
[0097] In the description of the utility model, the description of reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.
[0098] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and its equivalents.
Claims
1. A photovoltaic module, characterized in that, include: Multiple battery cells are connected in series. Each battery cell includes a first battery cell and at least one second battery cell. The length of the first battery cell is the same as the length of the second battery cell. The first battery unit includes two first sub-battery units arranged in parallel along a first direction. The first sub-battery unit includes multiple first battery columns arranged in series along a second direction. The first battery column includes multiple first battery cells arranged in series along the first direction. The second battery unit includes two second sub-battery units arranged in parallel along the first direction. The second sub-battery unit includes multiple second battery columns arranged in parallel along the second direction. The second battery column includes multiple second battery cells arranged in series along the first direction. The area of the second battery cells is different from the area of the first battery cells.
2. The photovoltaic module according to claim 1, characterized in that, The first sub-cell unit includes M first cell columns, and the second sub-cell unit includes M second cell columns. The area of the first cell is M times the area of the second cell, where M is a natural number greater than or equal to 2.
3. The photovoltaic module according to claim 1, characterized in that, The width of the first solar cell is W1, and the length of the first solar cell is L1, wherein W1 and L1 respectively satisfy: 91mm≤W1≤120mm, 182mm≤L1≤240mm; and / or, The width of the second battery cell is W2, and the length of the second battery cell is L2, wherein W2 and L2 satisfy the following conditions: 45.5mm≤W2≤60mm and 182mm≤L2≤240mm, respectively.
4. The photovoltaic module according to claim 1, characterized in that, The spacing between two adjacent first battery cells is greater than the spacing between two adjacent second battery cells.
5. The photovoltaic module according to claim 1, characterized in that, The spacing between two adjacent first solar cells is D1, wherein D1 satisfies: -0.5mm ≤ D1 ≤ 1.0mm; and / or, The spacing between two adjacent second battery cells is D2, wherein D2 satisfies: -0.5mm≤D2≤1.0mm.
6. The photovoltaic module according to claim 5, characterized in that, Also includes: A backplate is disposed on one side of the first battery cell in the thickness direction. The width of the backplate relative to the gap between two adjacent first battery cells and / or the gap between two adjacent second battery cells is D3, wherein D3 satisfies: 2mm≤D3≤5mm.
7. The photovoltaic module according to claim 1, characterized in that, The length of the first battery column is the same as the length of the second battery column.
8. The photovoltaic module according to any one of claims 1-7, characterized in that, Also includes: A first flow guide extends along the second direction, and two first sub-battery units and two second sub-battery units are respectively connected to the first flow guide.
9. The photovoltaic module according to claim 8, characterized in that, The two first sub-cells are symmetrically arranged about the first flow guide; and / or, The two second sub-battery units are symmetrically arranged about the first flow guide.
10. The photovoltaic module according to claim 8, characterized in that, Also includes: The first diode is electrically connected to the first current-conducting element, and the first diode is connected in reverse parallel to two first sub-battery units symmetrically arranged along the first direction.
11. The photovoltaic module according to claim 10, characterized in that, There are two second battery cells, and the first battery cell is located on one side of the two second battery cells along the second direction.
12. The photovoltaic module according to claim 11, characterized in that, Also includes: Multiple second flow guides are provided, and two second sub-battery units located on the same side of the first flow guide are connected in series through the second flow guides.
13. The photovoltaic module according to claim 12, characterized in that, Also includes: The third flow guide is electrically connected at both ends to the second flow guide and the first flow guide located between the two second battery cells, respectively. Two second diodes are electrically connected to the first current-conducting element, and either of the two second diodes is connected in reverse parallel to two second sub-cells symmetrically arranged along the first direction.
14. The photovoltaic module according to claim 13, characterized in that, The width of the third guide element is W, wherein W satisfies: 3mm≤W≤8mm.
15. The photovoltaic module according to claim 10, characterized in that, Also includes: The third diode is electrically connected to the first current-conducting element, and the third diode is connected in reverse parallel to two of the second battery cells.
16. A photovoltaic power generation system, characterized in that, Includes photovoltaic modules according to any one of claims 1-15.