CN112234112A - Photovoltaic module - Google Patents
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- CN112234112A CN112234112A CN201910567131.0A CN201910567131A CN112234112A CN 112234112 A CN112234112 A CN 112234112A CN 201910567131 A CN201910567131 A CN 201910567131A CN 112234112 A CN112234112 A CN 112234112A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
- H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
- H01L31/0508—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module the interconnection means having a particular shape
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention provides a photovoltaic module, which comprises a plurality of photovoltaic cells and a conductive piece, wherein the photovoltaic cells are sequentially arranged along a first direction, the conductive piece is electrically connected with two adjacent photovoltaic cells, and a bus electrode extending along the first direction is arranged on the surface of each photovoltaic cell; the conductive piece comprises a first part and a second part which respectively cover the bus electrodes of two adjacent photovoltaic cells, and the length of at least one of the first part and the second part along the first direction is less than half of the length of the bus electrodes along the first direction. According to the photovoltaic module, the more reliable electrical connection between the adjacent photovoltaic cells is realized through the conductive piece, the influence of the first part and/or the second part of the conductive piece on the surface shading area of the photovoltaic cells is reduced, the utilization rate of the photovoltaic module on solar radiation is improved, and the production cost is favorably reduced.
Description
Technical Field
The invention relates to the technical field of solar power generation, in particular to a photovoltaic module.
Background
The cell string of the traditional photovoltaic module realizes the electrical connection of the adjacent cell pieces through the solder strip, and the solder strip is connected with the bus electrode on the front surface of one cell piece and the bus electrode on the back surface of the other adjacent cell piece. The length of the part of the welding strip connected to the battery piece bus electrode is basically equivalent to the length of the corresponding bus electrode. With the development of industrial technology, the width of the bus electrode of a mainstream battery piece product is continuously reduced, and under the condition, the width of the welding strip is required to be reduced, the requirements on alignment precision and welding strength are higher, and the requirements on material performance and the difficulty of a manufacturing process are increased; and may also cause the light receiving area of the surface of the cell to be reduced.
Except this, there is the piece interval of 2 ~ 4mm more between above-mentioned photovoltaic module's the adjacent battery piece, and the irradiation energy of this subregion is not utilized, just under the same power output specification, and corresponding photovoltaic module's size demand is great, causes material waste and cost increase. In view of the above, the shingle assembly proposed in the industry cancels the inter-cell distance between adjacent cells, and realizes the electrical connection between adjacent cells through the conductive adhesive without providing a solder strip, but also faces the problems of high cost of the conductive adhesive material, difficulty in rework and the like. And the edges of adjacent cells in the above-mentioned laminated assembly are overlapped, and the overlapping area also affects the actual light receiving area and power output of the single cell.
In view of the above, there is a need for an improved photovoltaic module.
Disclosure of Invention
The invention aims to provide a photovoltaic module which can ensure the electrical connection of adjacent photovoltaic cells, improve the light receiving area utilization rate and power output and reduce the material cost.
In order to achieve the above object, the present invention provides a photovoltaic module, which includes a plurality of cell strings, each cell string includes a plurality of photovoltaic cells arranged along a first direction and a conductive member electrically connecting two adjacent photovoltaic cells, edges of the adjacent photovoltaic cells are overlapped, and a bus electrode extending along the first direction is disposed on a surface of each photovoltaic cell; the conductive piece comprises a first part and a second part which respectively cover the bus electrodes of two adjacent photovoltaic cells, and the length of at least one of the first part and the second part along the first direction is less than half of the length of the bus electrodes along the first direction.
As a further improvement of the present invention, the conductive members extend along the first direction and are distributed at intervals in the second direction; or the conductive piece extends along a second direction, and the second direction is perpendicular to the first direction.
As a further improvement of the present invention, at least a part of the conductive member is sandwiched between overlapping regions of two adjacent photovoltaic cells, the conductive member includes a plurality of first connecting segments extending along a first direction, and a second connecting segment extending along a second direction and connecting the plurality of first connecting segments, and the first part and the second part are respectively located at two ends of the first connecting segment in a longitudinal direction.
As a further refinement of the invention, at least one of the first and second portions is located at an overlapping edge of two adjacent photovoltaic cells.
As a further development of the invention, at least one of the first and second portions exceeds the overlapping area of the respective two photovoltaic cells in the first direction.
As a further improvement of the invention, the width of the overlapping area of the adjacent photovoltaic cells in the first direction is between 0.3 and 1.0 mm.
The invention also provides a photovoltaic module which comprises a plurality of cell strings, wherein each cell string comprises a plurality of photovoltaic cells arranged along the first direction and a conductive piece electrically connected with two adjacent photovoltaic cells, and a bus electrode extending along the first direction is arranged on the surface of each photovoltaic cell; the conductive piece comprises a plurality of first connecting sections extending along a first direction and a second connecting section extending along a second direction and connecting the first connecting sections, each first connecting section comprises a first part and a second part which are respectively arranged at two ends of the first connecting section in the longitudinal direction, the first parts and the second parts respectively cover the bus electrodes of two adjacent photovoltaic cells, and the length of at least one of the first parts and the second parts along the first direction is less than half of the length of the bus electrodes along the first direction.
As a further improvement of the invention, the spacing between adjacent photovoltaic cells is less than or equal to 0.5 mm.
As a further improvement of the present invention, at least one of the first portion and the second portion is located at an edge of the photovoltaic cell near a side of the corresponding conductive member.
As a further improvement of the invention, the length of at least one of the first part and the second part along the first direction is between 2 and 15 mm.
As a further improvement of the present invention, the bus bar electrode includes a contact portion welded to the conductive member, and a bus bar portion extending from the contact portion in a direction away from the conductive member, and a length of the bus bar portion is greater than a length of the contact portion.
As a further improvement of the present invention, a sectional area of the bus portion in the vertical first direction is larger than a sectional area of the contact portion in the vertical first direction.
As a further improvement of the present invention, the contact portion does not extend beyond the conductive member in a second direction, which is perpendicular to the first direction.
As a further improvement of the present invention, the second connecting section is made of a flexible conductive material and is disposed in a flat shape, and the second direction is perpendicular to the first direction.
As a further improvement of the present invention, an auxiliary electrode is further disposed at one end of the bus electrode close to the conductive member, and the second connecting segment covers and is connected to the auxiliary electrode.
As a further improvement of the present invention, the cell has a light receiving surface and a backlight surface, the first portion covers the bus electrode on the light receiving surface of one photovoltaic cell, the second portion covers the bus electrode on the backlight surface of the other photovoltaic cell, and the length of the first portion in the first direction is less than half of the length of the bus electrode in the first direction.
As a further development of the invention, the length of the second portion in the first direction is greater than the length of the first portion in the first direction.
As a further improvement of the present invention, the second connecting section is located at an intermediate position in a longitudinal direction of the first connecting section.
The invention has the beneficial effects that: by adopting the photovoltaic module, the more reliable electrical connection between the adjacent photovoltaic cells is realized through the conductive piece, and the length of the first part and/or the second part is set to be less than half of the length of the corresponding bus electrode, so that the influence of the conductive piece on the shading area of the surface of the photovoltaic cell is reduced, the utilization rate of the photovoltaic module on solar radiation is improved, and the production material cost can be reduced.
Drawings
FIG. 1 is a schematic plan view of a photovoltaic module according to the present invention;
fig. 2 is a schematic plan view of adjacent photovoltaic cells of a first embodiment of a photovoltaic module of the present invention;
FIG. 3 is a schematic side view of adjacent photovoltaic cells of FIG. 2;
fig. 4 is a schematic side view of adjacent photovoltaic cells of a second embodiment of a photovoltaic module of the present invention;
fig. 5 is a schematic plan view of a third embodiment of an adjacent photovoltaic cell in a photovoltaic module of the present invention;
fig. 6 is a schematic plan view of an adjacent photovoltaic cell of a fourth embodiment of a photovoltaic module of the present invention;
fig. 7 is a schematic plan view of a fifth embodiment of an adjacent photovoltaic cell in a photovoltaic module of the present invention;
FIG. 8 is a schematic front view of a photovoltaic cell in a photovoltaic module according to the present invention;
FIG. 9 is a schematic view of a conductive member in an embodiment of a photovoltaic module according to the present invention;
FIG. 10 is a schematic view of a conductive member in another embodiment of a photovoltaic module according to the present invention;
FIG. 11 is a schematic view of a conductive member in another embodiment of a photovoltaic module according to the present invention;
fig. 12 is a schematic plan view of adjacent photovoltaic cells of a sixth embodiment of a photovoltaic module of the present invention;
fig. 13 is a schematic plan view of adjacent photovoltaic cells of a seventh embodiment of a photovoltaic module of the present invention;
fig. 14 is a schematic side view of adjacent photovoltaic cells of fig. 13;
fig. 15 is a schematic plan view of adjacent photovoltaic cells of an eighth embodiment of a photovoltaic module of the present invention.
Detailed Description
The present invention will be described in detail below with reference to embodiments shown in the drawings. The present invention is not limited to the embodiment, and structural, methodological, or functional changes made by one of ordinary skill in the art according to the embodiment are included in the scope of the present invention. The terms "first" and "second" do not denote any sequence relationship, but are merely used for convenience of description. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 3, the photovoltaic module provided by the present invention includes a plurality of cell strings 100, and the arrangement direction of each cell in the cell strings 100 is defined as a first direction, so that the cell strings 100 include a plurality of photovoltaic cells 10 arranged in sequence along the first direction and conductive members 20 for electrically connecting adjacent photovoltaic cells 10. The arrangement of the cell strings 100 and the number of the photovoltaic cells 10 in each cell string 100 are not limited herein, and can be designed according to actual requirements.
The surface of the photovoltaic cell 10 is provided with bus electrodes extending along a first direction, the conductive member 20 comprises a first part 21 and a second part 22 respectively covering the bus electrodes of two adjacent photovoltaic cells 10, and the length of at least one of the first part 21 and the second part 22 along the first direction is less than half of the length of the corresponding bus electrode along the first direction. Generally, since the width of the conductive member 20 is greater than that of the bus electrodes, and the conductive member 20 itself may block some light receiving surfaces of the batteries, the embodiment of the invention may change the length of the conductive member so that most of the bus electrodes are exposed, thereby improving the light blocking effect of the conductive member 20 on the batteries.
Accordingly, the bus electrode may include a contact portion contacting the conductive member 20, and a bus portion extending from the contact portion in a direction away from the conductive member 20, and a length of the bus portion may be greater than a length of the contact portion.
In one embodiment of the present invention, the photovoltaic cell 10 includes a semiconductor substrate (e.g., a silicon substrate, a compound semiconductor substrate, etc.) 11, a front electrode 12 and a back electrode 13 respectively disposed on two side surfaces of the semiconductor substrate 11, wherein the front electrode 12 and the back electrode 13 are the above-mentioned "bus electrodes". The front electrode 12 and the back electrode 13 are corresponding in position and have the same length along the first direction. Alternatively, the photovoltaic cell may be a Multi-Busbar (MBB) cell, i.e., the number of the front and back electrodes 12 and 13 is set to be not less than 5. The first portion 21 overlies the front electrode 12 of one of the photovoltaic cells 10; the second portion 22 overlies the back electrode 13 of another adjacent photovoltaic cell 10. The front electrode 12 and the back electrode 13 merely show a relative positional relationship therebetween, and do not represent an electrode direction of the photovoltaic cell 10. Of course, the light-receiving surface of the photovoltaic cell 10 may also be provided with a pair of grid lines (not shown) for collecting surface current, which intersect the front electrode 12 and the back electrode 13 generally perpendicularly. When the sub-grid lines exist, the front electrode 12 and the back electrode 13 may be referred to as main grid lines, and are used for collecting and transmitting the current collected by each thin grid line.
The bus electrode and the conductive member 20 may be directly contacted and welded, or a conductive material (e.g., a conductive adhesive) may be added between the bus electrode and the conductive member to achieve electrical connection, which is not limited herein.
The photovoltaic cells 10 have two sides 110 oppositely arranged along a first direction, and the edge positions of adjacent photovoltaic cells 10 are overlapped to form an overlapping area 14. The overlapped area 14 extends along a second direction perpendicular to the first direction, and the width of the overlapped area 14 along the first direction is not more than 1.8mm, preferably, the width of the overlapped area 14 is 0.3-1.0 mm. When the width of the overlapping region 14 is set to the above range, the surface utilization of the single cell can be improved while the area utilization of the assembly is improved and the cell overlapping yield is ensured.
The conductive member 20 may be made of a metal conductive material with good flexibility, and the surface thereof is provided with a welding assistant layer, such as: tin-plated copper strips. The conductive member 20 is at least partially sandwiched in the overlapping region 14 of two adjacent photovoltaic cells 10, and at least one of the first portion 21 and the second portion 22 exceeds the overlapping region 14 of the two corresponding photovoltaic cells 10 along the first direction, where both the first portion 21 and the second portion 22 exceed the overlapping region 14. The conductive members 20 extend along the first direction and are spaced apart from each other in the second direction, in other words, two adjacent photovoltaic cells 10 are electrically connected by a plurality of conductive members 20 separated from each other, and the conductive members 20 correspond to the positions of the bus electrodes on the surfaces of the photovoltaic cells 10. The two ends of the conductive member 20 form the first portion 21 and the second portion 22, respectively, and the first portion 21 and the second portion 22 are connected to the front electrode 12 and the back electrode 13 of two adjacent photovoltaic cells 10, respectively.
The front electrode 12 includes a first contact portion 121 directly connected to the first portion 21 in a mating manner, and a first bus portion 122 extending from the first contact portion 121 in a direction away from the conductive member 20, wherein a length of the first bus portion 122 is greater than a length of the first contact portion 121. Of course, the front electrode 12 is continuously disposed to achieve smooth collection and transmission of the front current of the photovoltaic cell 10.
The front surface of the photovoltaic cell 10 is used as a light receiving surface, and on the basis of satisfying the electrical connection performance and structural strength requirements of the cell string 100, the smaller the length of the first contact portion 121 is, the smaller the influence of the first contact portion on the light receiving area of the photovoltaic cell 10 is, and the smaller the positioning difficulty is. Here, the first portions 21 are arranged at the overlapping edges of the respective photovoltaic cells 10, i.e. the length of the first portions 21 is much smaller than the length of the front electrode 12, preferably between 2 and 15 mm. The front electrode 12 contacts the conductive member 20 only through the first contact portion 121 thereof adjacent to the conductive member 20.
The length of the second portion 22 is greater than that of the first portion 21, and the length of the second portion 22 is substantially equal to that of the back electrode 13, so as to ensure the electrical connection performance between the back electrode 13 and the conductive member 20. The back electrode 13 may be provided in a sectional manner according to the actual requirement of the product, and the width of the back electrode 13 along the second direction may be increased appropriately to ensure reliable welding with the second portion 22.
The photovoltaic cells 10 do not need to be provided with edge electrodes and adopt corresponding conductive adhesives to realize the matching connection of the adjacent photovoltaic cells 10, the width of the overlapping area 14 can be greatly reduced, and the relative light receiving area and the power output of each photovoltaic cell 10 are improved.
Referring to fig. 4, this embodiment is distinguished from the previous embodiment by the following features: the length of the second portion 22 in the first direction is less than half the length of the back electrode 13 in the first direction. The back electrode 13 includes a second contact portion 131 directly contacting and mating with the second portion 22, and a second bus portion 132 extending from the second contact portion 131 in a direction away from the conductive member 20, wherein a length of the second bus portion 132 is greater than a length of the second contact portion 131.
Here, the first portion 21 and the second portion 22 are both disposed at the overlapping edges of two adjacent photovoltaic cells 10, i.e., the front electrode 12 and the back electrode 13 are both in contact with the conductive member 20 only through the portions thereof near the side edges 110 of the respective sides. Wherein, the back electrode 13 is also continuously arranged; the length of the second portion 22 in the first direction is also preferably 2-15 mm.
When the photovoltaic cell 10 is a double-sided cell, the length of the second portion 22 is reduced, so that the influence of the second portion on the light receiving area of the backlight surface of the photovoltaic cell 10 is effectively reduced, and the improvement of the back efficiency is facilitated. Moreover, the overall size of the conductive member 20 is greatly reduced, the material cost of the conductive member 20 is reduced, and the conductive member 20 and the photovoltaic cell 10 are conveniently aligned and welded.
Referring to fig. 5, in order to maintain the electrical connection performance between adjacent photovoltaic cells 10, the cross-sectional area of the first bus part 122 in the vertical first direction is larger than the cross-sectional area of the first contact part 121 in the vertical first direction, i.e., the current transmission capability of the first bus part 122 is stronger than that of the first contact part 121 with respect to the front electrode 12 itself. In practical applications, the first bus bar portion 122 may be formed by increasing the height of the gate line by a process such as secondary printing, so as to increase the cross-sectional area thereof. In order to facilitate the butting of the first contact portion 121 and the first portion 21, the width of the gate line of the first contact portion 121 may be increased, that is, the disposed width of the first contact portion 121 in the second direction is larger than the width of the first bus portion 122 in the second direction. Generally, the width of the first contact portion 121 in the second direction does not exceed the width of the first portion 21 in the second direction, so as to reduce the loss of the light receiving area of the surface of the corresponding photovoltaic cell 10. In other embodiments, the bus electrodes may be made of superconducting material (with a resistivity close to zero), such as: graphene, so that variations in the cross-sectional area of the bus electrode may not be considered.
Similarly, the cross-sectional area of the second bus portion 132 in the first direction is larger than the cross-sectional area of the second contact portion 131 in the first direction, and the width of the second contact portion 131 in the second direction is larger than the width of the second bus portion 132 in the second direction.
As shown in fig. 6, to improve the electrical connection performance of the adjacent photovoltaic cells 10, the lengths of the first and second portions 21 and 22 can be extended appropriately, but not more than half of the lengths of the corresponding front and back electrodes 12 and 13.
As shown in fig. 7, to facilitate the electrical connection between adjacent photovoltaic cells 10, the front and back sides of the photovoltaic cell 10 may be reversed, so that the back electrode 13 of the photovoltaic cell 10 is on the same side as the front electrode 12 of another adjacent photovoltaic cell 10, and the two are electrically connected by the conductive member 20.
In addition, as shown in fig. 8, in order to further ensure the electrical connection between the conductive members 20 and the corresponding front electrodes 12, front auxiliary electrodes 123 are further formed at the ends of the front electrodes 12, and the front auxiliary electrodes 123 are preferably disposed along the first direction not to exceed the first portion 21. The front auxiliary electrode 123 can be understood as a docking area provided at the end of the corresponding front electrode 12 and adapted to be in mating connection with the first portion 21. At this time, the first contact portion 121 is formed by the front auxiliary electrode 123, or the front auxiliary electrode 123 and other portions of the gate lines connected to the front auxiliary electrode 123. Of course, the back electrode 13 may also be provided with a corresponding back auxiliary electrode (not shown) toward the end of the conductive member 20 connected thereto.
Referring to fig. 9, in order to reduce the stress at the edge of the adjacent photovoltaic cells 10, the conductive member 20 extends continuously along a second direction perpendicular to the first direction, and the first portion 21 and the second portion 22 refer to the portions of the conductive member 20 contacting the corresponding bus electrodes.
Referring to fig. 10 to 12, in order to facilitate the soldering of the conductive member 20 and the bus bar electrode, the conductive member 20 includes a plurality of first connecting sections 201 extending in a first direction, and a plurality of second connecting sections 202 extending in a second direction and connecting the plurality of first connecting sections 201, and the first portion 21 and the second portion 22 are respectively located at two ends of the first connecting sections 201 in a longitudinal direction. The length of the second connecting segment 202 along the second direction is not less than the distance between two bus electrodes that are farthest away from the surface of the photovoltaic cell 10, so that the second connecting segment 202 can connect the plurality of first connecting segments 201 into a whole. The second connecting section 202 is preferably made of a flexible conductive material and is disposed in a flat shape. The first connecting section 201 and the second connecting section 202 may be made of the same flexible conductive material, or the second connecting section 202 may be made of other flexible conductive materials, and then the first connecting section 201 and the second connecting section 202 are connected. The portion of the first connecting segment 202 beyond the overlapping region 14 may cause a loss of a part of the light receiving area, and therefore, the width of the second connecting segment 202 along the first direction can be comprehensively evaluated according to the matching connection requirement and the output loss of the adjacent photovoltaic cells 10.
In particular, the second connecting segment 202 is located at the middle position in the longitudinal direction of the first connecting segment 201, that is, the first portion 21 and the second portion 22 have the same length, and are respectively connected at the overlapping edges of the adjacent photovoltaic cells 10. Of course, the connection position of the second connection section 202 relative to the first connection section 201 can also be adjusted according to the length relationship between the first portion 21 and the second portion 22. An auxiliary electrode (not shown) may be further disposed at an end of the front electrode 12 and/or the back electrode 13 close to the conductive member 20, and the second connection segment 202 covers and is connected to the auxiliary electrode.
The second connecting section 202 not only reduces the stress at the edge position of the adjacent photovoltaic cells 10, but also reduces the risk of hidden cracking; and the first connecting sections 201 connected with different bus electrodes are connected into a whole, so that the on-site preparation and processing are facilitated.
Referring to fig. 13 and 14, in this embodiment, adjacent photovoltaic cells 10 are disposed with a gap, and the distance between adjacent photovoltaic cells 10 is not more than 0.5 mm. Compared with the prior art, the effective light receiving area of the single photovoltaic cell 10 is increased by reducing the inter-cell distance between the adjacent photovoltaic cells 10.
In order to achieve the reduction of the pitch between adjacent photovoltaic cells 10, besides selecting suitable flexible conductive materials to make the corresponding conductive members 20, the thickness of the conductive members 20 corresponding to the bending position between adjacent photovoltaic cells 10 can be reduced appropriately. That is, the conductive member 20 has a third portion 23 located between the first and second portions 21 and 22 and having a smaller thickness than the first and second portions 21 and 22. Similarly, the front electrode 12 of the photovoltaic cell 10 includes a first contact 121 and a first bus 122; the back electrode 13 includes a second contact portion 131 and a second bus portion 132. In addition, the second portion 22 may be disposed with a length corresponding to the length of the back electrode 13 to ensure current collection and transmission on the back surface of the photovoltaic cell 10.
As shown in fig. 15, the adjacent photovoltaic cells 10 are also arranged with gaps; the conductive member 20 includes a plurality of first connection segments 201 extending along a first direction, and a second connection segment 202 extending along a second direction and connecting the plurality of first connection segments 201. The second connection section 202 is made of a flexible conductive material, such as a flexible metal material with a small thickness, a conductive adhesive tape, etc., so that the conductive member is integrally designed to enhance the electrical connection performance. Here, the second connection section 202 is connected to the middle of the first connection section 201, that is, the first and second portions 21 and 22 formed at both ends of the first connection section 201 have the same length.
In summary, the photovoltaic module of the present invention realizes reliable electrical connection between adjacent photovoltaic cells 10 through the conductive members 20, thereby improving the utilization rate of solar radiation and ensuring the power output of each of the photovoltaic cells 10. Moreover, the conductive members 20 are disposed at the edge positions of the corresponding photovoltaic cells 10, that is, the bus electrodes of the corresponding photovoltaic cells 10 are only connected with the conductive members 20 in a matching manner through the portions close to the conductive members 20, and the rest portions do not need to be connected with the conductive members 20 in an alignment manner, so that the influence of the conductive members 20 on the light receiving area of the surface of the photovoltaic cells 10 is reduced, the risk that the conductive members 20 deviate from the bus electrodes is reduced, and the material cost of the conductive members 20 can also be reduced.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (18)
1. A photovoltaic module, includes a plurality of battery cluster, its characterized in that: the cell string comprises a plurality of photovoltaic cells arranged along a first direction and conductive pieces electrically connected with two adjacent photovoltaic cells, the edges of the adjacent photovoltaic cells are overlapped, and bus electrodes extending along the first direction are arranged on the surfaces of the photovoltaic cells; the conductive piece comprises a first part and a second part which respectively cover the bus electrodes of two adjacent photovoltaic cells, and the length of at least one of the first part and the second part along the first direction is less than half of the length of the bus electrodes along the first direction.
2. The photovoltaic module of claim 1, wherein: the conductive pieces extend along the first direction and are distributed at intervals in the second direction; or the conductive piece extends along a second direction, and the second direction is perpendicular to the first direction.
3. The photovoltaic module of claim 1, wherein: at least part of the conductive piece is clamped in an overlapping area of two adjacent photovoltaic cells, the conductive piece comprises a plurality of first connecting sections extending along a first direction and a second connecting section extending along a second direction and connecting the first connecting sections, and the first part and the second part are respectively positioned at two ends of the first connecting section in the longitudinal direction.
4. The photovoltaic module of claim 1, wherein: at least one of the first and second portions is located at an overlapping edge of two adjacent photovoltaic cells.
5. The photovoltaic module of claim 1, wherein: at least one of the first and second portions exceeds an overlap region of the respective two photovoltaic cells in a first direction.
6. The photovoltaic module of claim 1, wherein: the width of the overlapping area of the adjacent photovoltaic cells in the first direction is 0.3-1.0 mm.
7. A photovoltaic module, includes a plurality of battery cluster, its characterized in that: the cell string comprises a plurality of photovoltaic cells arranged along a first direction and conductive pieces electrically connected with two adjacent photovoltaic cells, and a bus electrode extending along the first direction is arranged on the surface of each photovoltaic cell; the conductive piece comprises a plurality of first connecting sections extending along a first direction and a second connecting section extending along a second direction and connecting the first connecting sections, each first connecting section comprises a first part and a second part which are respectively arranged at two ends of the first connecting section in the longitudinal direction, the first parts and the second parts respectively cover the bus electrodes of two adjacent photovoltaic cells, and the length of at least one of the first parts and the second parts along the first direction is less than half of the length of the bus electrodes along the first direction.
8. The photovoltaic module of claim 7, wherein: the distance between adjacent photovoltaic cells is less than or equal to 0.5 mm.
9. The photovoltaic module of claim 7, wherein: at least one of the first and second portions is located at an edge of the photovoltaic cell adjacent to a side of the respective conductive member.
10. The photovoltaic module of claim 1 or 7, wherein: the length of at least one of the first and second portions in the first direction is between 2 and 15 mm.
11. The photovoltaic module of claim 1 or 7, wherein: the bus electrode comprises a contact part welded with the conductive piece and a bus part extending from the contact part along a direction departing from the conductive piece, and the length of the bus part is greater than that of the contact part.
12. The photovoltaic module of claim 11, wherein: the cross-sectional area of the bus portion in the vertical first direction is larger than the cross-sectional area of the contact portion in the vertical first direction.
13. The photovoltaic module of claim 11, wherein: the contact part does not exceed the conductive piece along a second direction, and the second direction is perpendicular to the first direction.
14. The photovoltaic module of claim 3 or 7, wherein: the second connecting section is made of flexible conductive materials and is arranged in a flat shape, and the second direction is perpendicular to the first direction.
15. The photovoltaic module of claim 3 or 7, wherein: and one end of the bus electrode, which is close to the conductive piece, is also provided with an auxiliary electrode, and the second connecting section covers and is connected to the auxiliary electrode.
16. The photovoltaic module of claim 1 or 7, wherein: the cell is provided with a light receiving surface and a backlight surface, the first part covers a bus electrode on the light receiving surface of one photovoltaic cell, the second part covers a bus electrode on the backlight surface of the other photovoltaic cell, and the length of the first part along the first direction is smaller than half of the length of the bus electrode along the first direction.
17. The photovoltaic module of claim 16, wherein: the length of the second portion in the first direction is greater than the length of the first portion in the first direction.
18. The photovoltaic module of claim 3 or 7, wherein: the second connecting section is located at the middle position in the longitudinal direction of the first connecting section.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010880911.3A CN112234114A (en) | 2019-06-27 | 2019-06-27 | Photovoltaic module |
| CN201910567131.0A CN112234112A (en) | 2019-06-27 | 2019-06-27 | Photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910567131.0A CN112234112A (en) | 2019-06-27 | 2019-06-27 | Photovoltaic module |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010880911.3A Division CN112234114A (en) | 2019-06-27 | 2019-06-27 | Photovoltaic module |
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| Publication Number | Publication Date |
|---|---|
| CN112234112A true CN112234112A (en) | 2021-01-15 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910567131.0A Pending CN112234112A (en) | 2019-06-27 | 2019-06-27 | Photovoltaic module |
| CN202010880911.3A Withdrawn CN112234114A (en) | 2019-06-27 | 2019-06-27 | Photovoltaic module |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010880911.3A Withdrawn CN112234114A (en) | 2019-06-27 | 2019-06-27 | Photovoltaic module |
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| CN (2) | CN112234112A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113178501A (en) * | 2021-04-06 | 2021-07-27 | 中国科学院上海微系统与信息技术研究所 | Flexible photovoltaic module and preparation method thereof |
-
2019
- 2019-06-27 CN CN201910567131.0A patent/CN112234112A/en active Pending
- 2019-06-27 CN CN202010880911.3A patent/CN112234114A/en not_active Withdrawn
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| CN112234114A (en) | 2021-01-15 |
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Address after: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Applicant after: CSI Cells Co.,Ltd. Applicant after: Changshu Artes Sunshine Power Technology Co.,Ltd. Applicant after: Atlas sunshine Power Group Co.,Ltd. Address before: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Applicant before: CSI Cells Co.,Ltd. Applicant before: Changshu Artes Sunshine Power Technology Co.,Ltd. Applicant before: CSI SOLAR POWER GROUP Co.,Ltd. |
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