CN109616540B - Battery string and photovoltaic module - Google Patents
Battery string and photovoltaic module Download PDFInfo
- Publication number
- CN109616540B CN109616540B CN201910092044.4A CN201910092044A CN109616540B CN 109616540 B CN109616540 B CN 109616540B CN 201910092044 A CN201910092044 A CN 201910092044A CN 109616540 B CN109616540 B CN 109616540B
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- welding strip
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- adhesive film
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- electrode
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- 238000003466 welding Methods 0.000 claims abstract description 142
- 230000001681 protective effect Effects 0.000 claims abstract description 73
- 239000002313 adhesive film Substances 0.000 claims abstract description 56
- 229910000679 solder Inorganic materials 0.000 claims description 69
- 230000007704 transition Effects 0.000 claims description 13
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 230000006978 adaptation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
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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
-
- 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
- H01L31/02—Details
- H01L31/0216—Coatings
- H01L31/02161—Coatings for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/02167—Coatings for devices characterised by at least one potential jump barrier or surface barrier for solar cells
-
- 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
- H01L31/048—Encapsulation of modules
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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
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a battery string, which comprises a first welding strip section and a second welding strip section which are alternately distributed along the axial direction of the welding strip, wherein the first welding strip section is cylindrical, and the second welding strip section is sheet-shaped. The first welding strip section is attached to the first electrode on the light receiving side surface of the battery piece, and the second welding strip section is attached to the second electrode on the backlight side surface of the battery piece. And the first protective adhesive film with the gram weight corresponding to the first welding strip section covers the front surface of the battery piece and the first welding strip section, and the second protective adhesive film with the gram weight corresponding to the second welding strip section covers the back surface of the battery piece and the second welding strip section. The first welding strip section can effectively reduce the area of the light receiving side surface of the battery piece, which is shielded; because the thickness of the second welding strip section is thinner, the gram weight of the second protective adhesive film is obviously smaller than that of the first protective adhesive film, and the cost of the corresponding second protective adhesive film is obviously smaller than that of the first protective adhesive film, thereby effectively reducing the cost of the battery string. The invention also provides a photovoltaic module, which has the beneficial effects.
Description
Technical Field
The invention relates to the technical field of photovoltaics, in particular to a battery string and a photovoltaic module.
Background
With the development progress of the photovoltaic industry, in order to further improve the efficiency of the solar cell, in pursuit of high conversion efficiency of the solar cell and high output power of the components, attempts are made to increase the effective light receiving area of the cell by adopting thinner main grids and thin grids, and compared with the traditional 4-5 grids, the number of main grid lines of the cell is increased to 6 main grids, 9 main grids and 12 main grids so as to be more. Accordingly, in order to avoid the situation that the battery pieces are connected in series and the surface of the battery pieces is shielded by too much welding strips, and in order to ensure that the welding strips have lower resistance, a plurality of battery pieces are connected in series into a battery string by using a round wire welding strip, namely, a welding strip in a cylindrical shape.
However, the use of the round wire bonding tape greatly increases the cost of the battery string, so that a problem to be solved by those skilled in the art is how to provide a battery string having a low cost.
Disclosure of Invention
The invention aims to provide a battery string with lower cost; another object of the present invention is to provide a photovoltaic module having a low cost.
In order to solve the technical problems, the invention provides a battery string, which comprises at least two battery pieces, a welding strip, a first protective adhesive film and a second protective adhesive film;
the light receiving side surface of the battery piece is provided with a first electrode, and the backlight side surface of the battery piece is provided with a second electrode with the polarity opposite to that of the first electrode; the welding strip comprises first welding strip sections and second welding strip sections which are alternately distributed along the axial direction of the welding strip; the first welding strip section is cylindrical, and is attached to the first electrode; the second welding strip section is sheet-shaped, the thickness of the second welding strip section is smaller than the diameter of the first welding strip section, the width of the second welding strip section is larger than the diameter of the first welding strip section, and the second welding strip section is attached to the second electrode;
the first protective adhesive film covers the light receiving side surface of the battery piece and the first welding strip section, and the gram weight of the first protective adhesive film corresponds to the first welding strip section; the second protective adhesive film covers the backlight side surface of the battery piece and the second welding strip section, and the gram weight of the second protective adhesive film corresponds to the second welding strip section.
Optionally, the battery pieces are arranged in a straight line along a preset direction; the axial direction of the first electrode is parallel to the preset direction, and the axial direction of the second electrode is parallel to the preset direction.
Optionally, the first electrodes are in one-to-one correspondence with the first welding strip sections; the second electrodes are in one-to-one correspondence with the second welding strip sections.
Optionally, the first protective adhesive film is a first EVA adhesive film; the second protective adhesive film is a second EVA adhesive film.
Optionally, the first welding strip section and the second welding strip section are in smooth transition.
Optionally, the diameter of the first welding strip section ranges from 0.3mm to 0.5mm, including the end point value.
The invention also provides a photovoltaic module, which comprises the battery string.
The welding strip comprises first welding strip sections and second welding strip sections which are alternately distributed along the axial direction of the welding strip, wherein the first welding strip sections are cylindrical, and the second welding strip sections are sheet-shaped. The first welding strip section is attached to the first electrode on the light receiving side surface of the battery piece, and the second welding strip section is attached to the second electrode on the backlight side surface of the battery piece. And the first protective adhesive film with the gram weight corresponding to the first welding strip section covers the front surface of the battery piece and the first welding strip section, and the second protective adhesive film with the gram weight corresponding to the second welding strip section covers the back surface of the battery piece and the second welding strip section. The first welding strip section is similar to a round wire welding strip, so that the area of the surface of the light receiving side of the battery piece, which is shielded, can be effectively reduced; the second welding strip section is similar to a conventional welding strip, and because the thickness of the second welding strip section is thinner, the gram weight of the second protective adhesive film is obviously smaller than that of the first protective adhesive film, and the corresponding cost of the second protective adhesive film is obviously smaller than that of the first protective adhesive film. By using the sectional type welding strip, a second protective adhesive film with lower cost can be arranged on the surface of the backlight side of the battery piece, so that the cost of the battery string is effectively reduced.
The invention also provides a photovoltaic module, which has the same beneficial effects and is not described in detail herein.
Drawings
For a clearer description of embodiments of the invention or of the prior art, the drawings that are used in the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a battery string according to an embodiment of the present invention;
FIG. 2 is a schematic top view of FIG. 1;
FIG. 3 is a schematic side view of a specific battery string according to an embodiment of the present invention;
fig. 4 is a schematic top view of fig. 3.
In the figure: 1. the battery piece, 11, first electrode, 12, second electrode, 21, first welding strip section, 22, second welding strip section, 23, transition section, 31, first protection adhesive film, 32, second protection adhesive film.
Detailed Description
The core of the invention is to provide a battery string. In the prior art, if a round wire welding strip is used for preparing the battery string, a protective adhesive film with higher gram weight is needed to be matched to prevent the battery piece from cracking and prevent bubbles from occurring near the round wire welding strip due to thicker round wire welding strip. The cost of the protective adhesive film with high gram weight is high, so that the cost of the battery string can be greatly increased by using the round wire welding belt.
The welding strip comprises first welding strip sections and second welding strip sections which are alternately distributed along the axial direction of the welding strip, wherein the first welding strip sections are cylindrical, and the second welding strip sections are sheet-shaped. The first welding strip section is attached to the first electrode on the light receiving side surface of the battery piece, and the second welding strip section is attached to the second electrode on the backlight side surface of the battery piece. And the first protective adhesive film with the gram weight corresponding to the first welding strip section covers the front surface of the battery piece and the first welding strip section, and the second protective adhesive film with the gram weight corresponding to the second welding strip section covers the back surface of the battery piece and the second welding strip section. The first welding strip section is similar to a round wire welding strip, so that the area of the surface of the light receiving side of the battery piece, which is shielded, can be effectively reduced; the second welding strip section is similar to a conventional welding strip, and because the thickness of the second welding strip section is thinner, the gram weight of the second protective adhesive film is obviously smaller than that of the first protective adhesive film, and the corresponding cost of the second protective adhesive film is obviously smaller than that of the first protective adhesive film. By using the sectional type welding strip, a second protective adhesive film with lower cost can be arranged on the surface of the backlight side of the battery piece, so that the cost of the battery string is effectively reduced.
In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a battery string according to an embodiment of the present invention; fig. 2 is a schematic top view of fig. 1.
Referring to fig. 1, in the embodiment of the present invention, the battery string generally includes at least two battery pieces 1, a welding strip, a first protective adhesive film 31 and a second protective adhesive film 32; the light receiving side surface of the battery piece 1 is provided with a first electrode 11, and the backlight side surface of the battery piece 1 is provided with a second electrode 12 with the polarity opposite to that of the first electrode 11; the welding strip comprises first welding strip sections 21 and second welding strip sections 22 which are alternately distributed along the axial direction of the welding strip; the first welding strip section 21 is cylindrical, and the first welding strip section 21 is attached to the first electrode 11; the second welding strip section 22 is sheet-shaped, the thickness of the second welding strip section 22 is smaller than the diameter of the first welding strip section 21, the width of the second welding strip section 22 is larger than the diameter of the first welding strip section 21, and the second welding strip section 22 is attached to the second electrode 12; the first protective adhesive film 31 covers the light receiving side surface of the battery piece 1 and the first welding strip section 21, and the gram weight of the first protective adhesive film 31 corresponds to the first welding strip section 21; the second protective film 32 covers the backlight side surface of the battery piece 1 and the second solder strip section 22, and the gram weight of the second protective film 32 corresponds to the second solder strip section 22.
Typically, the solar cell sheet 1 applied to the photovoltaic module has a side facing the sun and a side facing away from the sun, wherein the side facing the sun is often referred to as the light receiving side, also referred to as the front side; the side facing away from the sun is often referred to as the backlight side, also referred to as the back side. The battery piece 1 forming the battery string provided by the embodiment of the invention can be a conventional single-sided battery piece 1 or a double-sided battery piece 1. When the battery piece 1 is a single-sided battery piece 1, the battery piece 1 can receive light only on the light receiving side; when the battery sheet 1 is a double-sided battery sheet 1, the side of the battery sheet 1 that mainly receives light is the light receiving side, and only a small amount of light is received at the backlight side of the battery sheet 1. The specific structure of the battery sheet 1 may refer to the prior art, and will not be described herein.
In the embodiment of the invention, the light receiving side surface of the battery sheet 1 is provided with the first electrode 11, the backlight side of the battery sheet 1 is provided with the second electrode 12, and the polarities of the first electrode 11 and the second electrode 12 are opposite. That is, if the first electrode 11 is a positive electrode, the second electrode 12 is a negative electrode. In general, the first electrode 11 is a main gate line provided on the light receiving side surface of the battery sheet 1, and the second electrode 12 is a main gate line provided on the backlight side surface of the battery sheet 1. The specific structure of the first electrode 11 and the second electrode 12 can refer to the prior art, and will not be described herein. The above-mentioned battery string is generally required to be formed by connecting a plurality of battery pieces 1 in series, and specifically, in the embodiment of the present invention, the battery pieces 1 are connected in series by a welding strip.
In the embodiment of the invention, the welding strip comprises first welding strip sections 21 and second welding strip sections 22 which are alternately distributed along the axial direction of the welding strip; the first welding strip section 21 is cylindrical, and the first welding strip section 21 is attached to the first electrode 11; the second solder strip section 22 is sheet-shaped, the thickness of the second solder strip section 22 is smaller than the diameter of the first solder strip section 21, and the width of the second solder strip section 22. The solder strip is of a sectional structure, and the first solder strip sections 21 and the second solder strip sections 22 are alternately arranged along the axial direction of the solder strip. The first solder strip section 21 is attached to the first electrode 11, that is, the first solder strip section 21 is attached to the light receiving side surface of the battery piece 1; the second solder strip section 22 is attached to the second electrode 12, that is, the second solder strip section 22 is attached to the backlight side surface of the battery chip 1. The two electrodes of the adjacent battery cells 1 having opposite polarities can be electrically connected by the above-described solder tape, thereby connecting the battery cells 1 in series.
The first solder strip section 21 is cylindrical and the second solder strip section 22 is sheet-shaped. Typically, the resistance of the first strap section 21 is substantially identical to the resistance of the second strap section 22, so that the resistance of the entire strap is uniform. Specifically, the width of the second solder strip section 22 needs to be larger than the diameter of the first solder strip section 21, so that the first solder strip section 21 on the light receiving side surface of the battery piece 1 has a smaller width than the second solder strip section 22 on the backlight side surface of the battery piece 1, and thus the first solder strip section 21 can shield the light receiving side surface of the battery piece 1 less. In addition, the thickness of the second solder strip section 22 needs to be smaller than the diameter of the first solder strip section 21, so that the second protective film 32 with smaller gram weight can be attached to the backlight side surface of the battery piece 1. The specific materials of the solder strip can refer to the prior art, and will not be described herein.
The first protective film 31 needs to be attached to the light receiving side surface of the battery piece 1, and the first protective film 31 needs to cover the first solder strip section 21 to protect and fix the first solder strip section 21 and the light receiving side surface of the battery piece 1. It should be noted that the gram weight of the first protective film 31 needs to correspond to the first solder strip section 21. The second protective film 32 needs to be attached to the backlight side surface of the battery 1, and the second protective film 32 needs to cover the second solder strip section 22 to protect and fix the second solder strip section 22 and the backlight side surface of the battery 1. It should be further noted that the grammage of the second protective film 32 needs to correspond to the second solder strip section 22. Since the thickness of the first solder strip section 21 is greater than the thickness of the second solder strip section 22, the gram weight of the corresponding first protective film 31 corresponding to the first solder strip section 21 will be greater than the gram weight of the second protective film 32 corresponding to the second solder strip section 22, i.e. the cost of the first protective film 31 is generally higher than the cost of the second protective film 32. Typically, the first protective film 31 is a first EVA film, and the second protective film 32 is a second EVA film. That is, the first protective film 31 and the second protective film 32 are made of EVA film, but the gram weight and cost of the first EVA film are obviously higher than those of the second EVA film.
In order to prevent air bubbles from occurring around the first welding strip section 21 after the first protective adhesive film 31 is attached, in order to reduce the risk of welding hidden cracks of the first welding strip section 21, and in order to reduce the manufacturing cost of the battery string, the first protective adhesive film 31 is usually an EVA adhesive film with high gram weight, and the second protective adhesive film 32 is usually an EVA adhesive film with conventional gram weight. The specific grammage of the first protective film 31 and the second protective film 32 may refer to the prior art, and will not be described herein.
Normally, the battery pieces 1 are arranged in a straight line along a preset direction; the axial direction of the first electrode 11 is parallel to the preset direction, and the axial direction of the second electrode 12 is parallel to the preset direction. That is, in the embodiment of the invention, the battery pieces 1 forming the same battery string are arranged along the extension line of the axis of the first electrode 11 or the second electrode 12, and the arrangement mode can facilitate the arrangement of the welding strips and prevent the welding strips from bending. In general, the first solder strip sections 21 in the battery string correspond to the first electrodes 11 in the battery string one by one, and the second solder strip sections 22 in the battery string correspond to the second electrodes 12 in the battery string one by one, so that the solder strips can uniformly collect the current generated by the battery piece 1 and the solder strips are not wasted.
The welding strip comprises first welding strip sections 21 and second welding strip sections 22 which are alternately distributed along the axial direction of the welding strip, wherein the first welding strip sections 21 are cylindrical, and the second welding strip sections 22 are sheet-shaped. The first solder strip section 21 is attached to the first electrode 11 on the light receiving side surface of the battery sheet 1, and the second solder strip section 22 is attached to the second electrode 12 on the backlight side surface of the battery sheet 1. While a first protective film 31 with a gram weight corresponding to the first solder strip section 21 covers the front surface of the battery piece 1 and the first solder strip section 21, and a second protective film 32 with a gram weight corresponding to the second solder strip section 22 covers the back surface of the battery piece 1 and the second solder strip section 22. The first welding strip section 21 is similar to a round wire welding strip, so that the area of the surface of the light receiving side of the battery piece 1, which is shielded, can be effectively reduced; the second solder strip section 22 is similar to the conventional solder strip, and the second solder strip section 22 has a smaller thickness, so that the gram weight of the second protective film 32 is significantly smaller than that of the first protective film 31, and the cost of the corresponding second protective film 32 is significantly smaller than that of the first protective film 31. The second protective adhesive film 32 with lower cost can be arranged on the backlight side surface of the battery piece 1 by using the sectional type welding strip, so that the cost of the battery string is effectively reduced.
The specific structure of a battery string provided in the embodiments of the present invention will be described in detail in the following embodiments of the present invention.
Referring to fig. 3 and fig. 4, fig. 3 is a schematic side view of a specific battery string according to an embodiment of the present invention; fig. 4 is a schematic top view of fig. 3.
The embodiment of the present invention is different from the embodiment of the present invention described above, and the structure of the solder strip in the battery string is further specifically limited on the basis of the embodiment of the present invention described above. The rest of the content is described in detail in the above embodiment of the invention, and will not be described in detail here.
Referring to fig. 3 and 4, in an embodiment of the present invention, the first solder strip section 21 and the second solder strip section 22 have a smooth transition therebetween. That is, in the embodiment of the present invention, a transition section 23 is provided between the first solder strip section 21 and the second solder strip section 22 adjacent to each other, and in the transition section 23, in a direction from the first solder strip section 21 to the second solder strip section 22, the thickness of the transition section 23 is gradually changed from being equal to the diameter of the first solder strip section 21 to being equal to the thickness of the second solder strip section 22; the width of the transition section 23 is graded from being equal to the diameter of the first solder strip section 21 to being equal to the width of the second solder strip section 22, so that the dimension between the first solder strip section 21 and the second solder strip section 22 is smoothly and uniformly graded. Because the welding strip is in the use, the stress can be concentrated at the inflection point of the welding strip surface, and after the transition section 23 is arranged, the welding strip surface is not provided with obvious inflection points, so that the fracture of the sectional welding strip in the use process can be greatly avoided.
Typically, the diameter of the first solder strip segment 21 in the present embodiment is typically in the range of 0.3mm to 0.5mm, inclusive; i.e. the diameter of the first solder strip section 21 may be exactly 0.3mm or 0.5mm. It should be noted that, in the embodiment of the present invention, the width of the first electrode 11 located on the light receiving side surface of the battery sheet 1 is generally required to be not greater than the diameter of the first solder strip section 21. It should be noted that, the length of the first solder strip section 21 is generally equal to the length of the battery piece 1, and the length of the corresponding second solder strip section 22 is also generally equal to the length of the battery piece 1. When the above-mentioned transition section 23 is provided in the solder strip, the transition section 23 is usually located between adjacent battery pieces 1 in the battery string to serve as a connection.
According to the battery string provided by the embodiment of the invention, the transition section 23 is arranged to enable the first welding strip section 21 and the second welding strip section 22 to be in smooth transition, so that the surface of the welding strip does not have obvious inflection points, and the segmented welding strip can be greatly prevented from being broken in the using process.
The invention also provides a photovoltaic module, which comprises the battery string provided by any one of the embodiments of the invention. The rest of the components refer to the prior art, and are not described in detail herein.
The battery string provided by the embodiment of the invention has lower cost, and the photovoltaic module provided by the embodiment of the invention can also have lower cost, so that the competitiveness of the photovoltaic module in the market is improved.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, so that the same or similar parts between the embodiments are referred to each other.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The battery string and the photovoltaic module provided by the invention are described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (6)
1. The battery string is characterized by comprising at least two battery pieces, a welding belt, a first protective adhesive film and a second protective adhesive film;
the light receiving side surface of the battery piece is provided with a first electrode, and the backlight side surface of the battery piece is provided with a second electrode with the polarity opposite to that of the first electrode; the welding strip comprises first welding strip sections and second welding strip sections which are alternately distributed along the axial direction of the welding strip; the first welding strip section is cylindrical, and is attached to the first electrode; the second welding strip section is sheet-shaped, the thickness of the second welding strip section is smaller than the diameter of the first welding strip section, the width of the second welding strip section is larger than the diameter of the first welding strip section, and the second welding strip section is attached to the second electrode; the width of the first electrode is not greater than the diameter of the first welding strip section;
the first protective adhesive film covers the light receiving side surface of the battery piece and the first welding strip section, and the gram weight of the first protective adhesive film corresponds to the first welding strip section; the second protective adhesive film covers the backlight side surface of the battery piece and the second welding strip section, and the gram weight of the second protective adhesive film corresponds to the second welding strip section; the gram weight of the first protective adhesive film is larger than that of the second protective adhesive film; the first protective adhesive film is an EVA adhesive film with high gram weight, and the second protective adhesive film is an EVA adhesive film with conventional gram weight.
2. The battery string according to claim 1, wherein the battery cells are arranged in a straight line along a predetermined direction; the axial direction of the first electrode is parallel to the preset direction, and the axial direction of the second electrode is parallel to the preset direction.
3. The battery string of claim 2, wherein the first electrodes are in one-to-one correspondence with the first solder strip segments; the second electrodes are in one-to-one correspondence with the second welding strip sections.
4. A battery string according to any one of claims 1 to 3, wherein the first and second strap segments have a smooth transition therebetween.
5. The battery string of claim 4, wherein the diameter of the first solder strip section has a value in the range of 0.3mm to 0.5mm, inclusive.
6. A photovoltaic module comprising the cell string of any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910092044.4A CN109616540B (en) | 2019-01-30 | 2019-01-30 | Battery string and photovoltaic module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910092044.4A CN109616540B (en) | 2019-01-30 | 2019-01-30 | Battery string and photovoltaic module |
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| Publication Number | Publication Date |
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| CN109616540A CN109616540A (en) | 2019-04-12 |
| CN109616540B true CN109616540B (en) | 2024-04-12 |
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| CN201910092044.4A Active CN109616540B (en) | 2019-01-30 | 2019-01-30 | Battery string and photovoltaic module |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429143A (en) * | 2019-07-19 | 2019-11-08 | 苏州迈展自动化科技有限公司 | A kind of electrode, photovoltaic cell and photovoltaic cell component for photovoltaic cell |
| CN111564516A (en) * | 2020-05-20 | 2020-08-21 | 浙江晶科能源有限公司 | Blocking type photovoltaic welding strip capable of reducing damp-heat attenuation |
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