Battery, manufacturing method of battery, battery assembly and battery module

Abstract

The invention relates to the technical field of solar cells, and provides a battery, a manufacturing method of the battery, a battery assembly and a battery module, the battery comprises a first packaging plate, a conductive member, a battery structure layer, a conductive layer and a second packaging plate; the conductive piece is arranged on the working surface side of the first packaging plate, and the first end of the conductive piece forms a suspended part relative to the first packaging plate; the battery structure layer at least covers the working surface of the first packaging plate and one side, far away from the first packaging plate, of the conductive part; the conductive layer and the second packaging plate are arranged on the side, away from the first packaging plate, of the battery structure layer, and an insertion hole matched with the suspension part is formed between the side, away from the first packaging plate, of the battery structure layer and the second packaging plate. According to the arrangement, the conductive piece is arranged, so that the convex suspension part and the concave insertion hole are formed in the battery, two batteries can be inserted together through the suspension part and the insertion hole to realize series connection, the operation is simple, and the disassembly is easy.

Description

Technical Field

[0001] The present invention relates to the technical field of solar cells, and in particular to a battery, a method for manufacturing a battery, a battery assembly and a battery module. Background Art

[0002] Solar cells, also known as photovoltaic cells, are devices that convert sunlight directly into electrical energy. They work based on the principle of the photoelectric effect to generate current. In order to significantly improve the performance of the cell, increase the photoelectric conversion efficiency, reduce reflection losses, enhance surface passivation, etc., the relevant technology uses a coating process to process solar cells. When using the coating process to process solar cells, it is necessary to deposit various layers on a substrate such as a silicon wafer, and finally deposit silver paste on the outer surface through a screen printing process to form a front contact electrode and a back contact electrode.

[0003] When solar cells are connected in series to form a solar cell module, it is generally necessary to use a soldering ribbon to weld one end of the soldering ribbon to the back contact electrode of one of the solar cells, and to weld the other end of the soldering ribbon to the front contact electrode of another solar cell. The required number of solar cells are connected in series before being packaged as a whole. The series connection operation is complicated. In addition, since the active layer of the solar cell is very sensitive to environmental factors such as temperature and humidity, there is a risk of the active layer of the solar cell being damaged and failing during the soldering ribbon process. It is also difficult to separate the individual solar cells in the solar cell module at a later stage.

[0004] Therefore, how to solve the problem that the serial connection operation between solar cells in the related art is complicated and the solar cell assembly formed in series is not easy to be disassembled becomes an important technical problem to be solved by those skilled in the art. Summary of the invention

[0005] The present invention provides a battery, a method for manufacturing a battery, a battery assembly and a battery module, which are used to solve the defects in the related art that the serial connection operation between solar cells is complicated and the solar cell assembly formed in series is not easy to be disassembled.

[0006] The present invention provides a battery, comprising: A first packaging board; A conductive member, disposed on the working surface side of the first packaging board, wherein a first end of the conductive member extends out of the first packaging board to form a suspended portion; A battery structure layer, covering at least a working surface of the first packaging board and a side of the conductive member away from the first packaging board; A conductive layer, disposed on a side of the battery structure layer away from the first packaging plate; The second packaging board is arranged on the side of the conductive layer away from the battery structure layer. The second packaging board is relatively fixed to the first packaging board. A plug-in hole is formed between the side of the battery structure layer away from the first packaging board and the second packaging board, and the plug-in hole is adapted to the suspended portion of the conductive part.

[0007] According to a battery provided by the present invention, a receiving groove is provided on the working surface of the first packaging board, the extending direction of the receiving groove is parallel to the working surface of the first packaging board, the two ends of the receiving groove respectively penetrate the first side surface and the second side surface of the first packaging board, and the first side surface and the second side surface are arranged opposite to or adjacent to each other; The conductive member is embedded in the receiving groove, and the second end of the conductive member is located in the receiving groove, so that the receiving groove forms an empty groove portion on the side of the second end of the conductive member away from the first end thereof, and the side wall of the empty groove portion is covered with the battery structure layer.

[0008] According to a battery provided by the present invention, the working surface of the first packaging plate is provided with at least two accommodating grooves, and the extending directions of the accommodating grooves are parallel to each other; The conductive member includes at least two metal wires, and each of the accommodating grooves is correspondingly provided with one of the metal wires.

[0009] According to a battery provided by the present invention, the battery structure layer includes a perovskite battery layer, a heterojunction battery layer, a tunneling oxide layer passivation contact battery layer, a passivation emitter and back battery layer, a full back contact battery, a cross back contact battery or a stacked battery.

[0010] A battery according to the present invention further comprises: A support plate is fixedly arranged on one of the first packaging plate and the second packaging plate, the support plate is suitable for supporting the suspended portion of the conductive member, the suspended portion of the conductive member is relatively fixed to the support plate, and the plug hole is suitable for the suspended portion of the conductive member and the support plate to extend into.

[0011] According to a battery provided by the present invention, the conductive member comprises at least two metal wires, each of the metal wires is provided with a corresponding support plate, and the number of the plug holes is the same as the number of the metal wires; Alternatively, the conductive member includes at least two metal wires, each of which corresponds to one of the support plates. The first packaging plate is also provided with a connecting hole, which connects each of the plug holes for insertion of the support plate and each of the metal wires.

[0012] The present invention also provides a method for manufacturing a battery, comprising: A conductive member is arranged on the working surface side of the first packaging board, so that a first end of the conductive member extends out of the first packaging board to form a suspended portion; Processing a battery structure layer on a working surface of the first packaging board and a side of the conductive member away from the first packaging board; Processing a conductive layer on a side of the battery structure layer away from the first packaging plate; A second packaging board is arranged on a side of the conductive layer away from the battery structure layer, and a plug hole is formed between the side of the battery structure layer away from the first packaging board and the second packaging board, wherein the plug hole is matched with the suspended portion of the conductive member.

[0013] According to a method for manufacturing a battery provided by the present invention, the step of providing a conductive member on the working surface side of the first packaging plate comprises: A receiving groove is processed on the working surface of the first packaging board, the extending direction of the receiving groove is parallel to the working surface of the first packaging board, the two ends of the receiving groove respectively penetrate the first side surface and the second side surface of the first packaging board, and the first side surface is arranged opposite to or adjacent to the second side surface; Placing the conductive member in the receiving groove so that the first end of the conductive member is located outside the first packaging board and the second end of the conductive member is located inside the receiving groove; The conductive member is fixed to the first packaging board by heat pressing.

[0014] The present invention also provides a battery assembly, comprising at least two batteries, wherein the batteries are the above-mentioned batteries, or the batteries are manufactured by the above-mentioned battery manufacturing method.

[0015] The present invention also provides a battery module, including the battery as described above, or including a battery manufactured by the battery manufacturing method described above, or including the battery assembly described above.

[0016] The battery provided by the present invention includes a first packaging board, a conductive member, a battery structure layer, a conductive layer and a second packaging layer, wherein the conductive member is arranged on the working surface side of the first packaging board, the first end of the conductive member extends to the outside of the first packaging board, and the first end of the conductive member forms a suspended portion relative to the first packaging board. The battery structure layer at least covers the working surface of the first packaging board and the side of the conductive member away from the first packaging board. The conductive layer is arranged on the side of the battery structure layer away from the first packaging board. The second packaging board is arranged on the side of the conductive layer away from the battery structure layer, and the second packaging board is relatively fixed to the first packaging board. A plug-in hole is formed between the side of the battery structure layer away from the first packaging board and the second packaging board, and the plug-in hole is adapted to the suspended portion of the conductive member. In this way, the conductive layer and the conductive member are respectively located on both sides of the battery structure layer, and can serve as the positive electrode and negative electrode of the battery, respectively. By setting the conductive member, a convex suspended portion and a concave plug hole are formed on the battery. When two batteries are connected, the suspended portion of one battery is plugged into the plug hole of the other battery, so that the suspended portion of the conductive member is electrically connected to the conductive layer, thereby realizing the series connection of the two batteries, which is simple to operate. Moreover, the plug-in connection between the suspended portion and the plug hole is a detachable connection, which is easy to disassemble, solving the problem that the series connection operation between solar cells in the related art is complicated and the solar cell assembly formed in series is not easy to disassemble.

[0017] It should be noted that the traditional battery assembly production process is to arrange and connect the required number of battery structure layers before encapsulating the whole, and a special assembly production line needs to be configured at the production site. The battery provided by the present invention is a packaged battery cell, and the packaging is completed while the battery cell is processed. And the electrical connection between two battery cells can be completed on the outside of the battery cell. When the battery assembly is formed in series, the required number of battery cells can be connected according to the requirements of the battery assembly. Compared with the structure and production process of the traditional battery assembly, the present invention can eliminate the assembly production line, reduce production costs, and reduce the space occupied by equipment.

[0018] In addition, the traditional battery packaging structure needs to process silver grid lines on the outside of the battery structure layer through the screen printing process to form electrodes, which requires the use of silver paste and screen printing equipment, and the cost of raw materials and equipment is high. The present invention proposes a new packaging structure for batteries, in which a conductive member is arranged between the first packaging plate and the battery structure layer, and a conductive layer is arranged between the second packaging plate and the battery structure layer, so that the conductive member and the conductive layer are used as electrodes, the process is simple, and copper materials can be directly used as the conductive member and the conductive layer, avoiding the use of silver paste and screen printing equipment, and greatly reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a cross-sectional view of the battery provided by the present invention when the battery structure layer is a perovskite battery layer (the cross-sectional plane is perpendicular to the working surface of the first packaging plate, and this figure only illustrates the relative position).

[0021] Figure 2 It is a schematic diagram of the relative positions of the first packaging board and the metal wire provided by the present invention.

[0022] Figure 3 It is a structural schematic diagram of the first packaging plate and metal wire provided by the present invention.

[0023] Figure 4 Schematic diagram of the structure of two batteries provided by the present invention connected in series (the thick solid line portion represents one battery, and the thin solid line portion represents the other battery).

[0024] Figure 5 It is a flow chart of the method for manufacturing the battery provided by the present invention.

[0025] Figure 6 It is a flow chart of a method for arranging a conductive member on the working surface side of a first packaging board provided by the present invention.

[0026] Figure 7 It is a flow chart of the method provided by the present invention for processing a perovskite cell layer on a working surface of a first packaging plate and a side of a conductive member away from the first packaging plate.

[0027] Reference numerals: 1. First packaging board; 2. Conductive member; 3. Suspended portion; 4. Conductive layer; 5. Second packaging board; 6. Plug hole; 7. Metal wire; 8. Support plate; 9. Connecting hole; 10. First transparent conductive layer; 11. Electron transport layer; 12. Perovskite active layer; 13. Hole transport layer; 14. Second transparent conductive layer; 15. Receiving groove. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Combine the following Figures 1 to 4 The battery of the present invention is described.

[0030] like Figure 1 and Figure 4 As shown, the battery provided by the embodiment of the present invention includes a first packaging board 1, a conductive member 2, a battery structure layer, a conductive layer 4 and a second packaging board 5.

[0031] Specifically, the conductive member 2 is disposed on the working surface side of the first packaging board 1 , and the first end of the conductive member 2 extends out of the first packaging board 1 , and the first end of the conductive member 2 forms a suspended portion 3 relative to the first packaging board 1 .

[0032] The battery structure layer at least covers the working surface of the first packaging board 1 and the side of the conductive member 2 away from the first packaging board 1. The conductive layer 4 is arranged on the side of the battery structure layer away from the first packaging board 1. The second packaging board 5 is arranged on the side of the conductive layer 4 away from the battery structure layer, and the second packaging board 5 is relatively fixed to the first packaging board 1.

[0033] A plug-in hole 6 is formed between the side of the battery structure layer away from the first packaging board 1 and the second packaging board 5 , and the plug-in hole 6 is matched with the suspended portion 3 of the conductive member 2 .

[0034] In this way, the conductive layer 4 and the conductive member 2 are respectively located on both sides of the battery structure layer, and can serve as the positive electrode and negative electrode of the battery respectively. By arranging the conductive member 2, a convex suspended portion 3 and a concave plug hole 6 are formed on the battery. When two batteries are connected, the suspended portion 3 of one battery is plugged into the plug hole 6 of the other battery. Figure 4 As shown, the suspended portion 3 of the conductive member 2 can be electrically connected to the conductive layer 4, thereby realizing the series connection of two batteries, and the operation is simple. Moreover, the plug connection between the suspended portion 3 and the plug hole 6 is a detachable connection, which is easy to disassemble, solving the problem that the series connection operation between solar cells in the related art is complicated and the solar cell assembly formed in series is not easy to disassemble.

[0035] In addition, in the embodiment of the present invention, the number of batteries required for the battery assembly can be determined according to the power generation demand, which has strong flexibility.

[0036] It should be noted that the traditional battery assembly production process is to arrange and connect the required number of battery structure layers before encapsulating the whole, and a special assembly production line needs to be configured at the production site. The battery provided by the present invention is a packaged battery cell, and the packaging is completed while the battery cell is processed. And the electrical connection between two battery cells can be completed on the outside of the battery cell. When the battery assembly is formed in series, the required number of battery cells can be connected according to the requirements of the battery assembly. Compared with the structure and production process of the traditional battery assembly, the present invention can eliminate the assembly production line, reduce production costs, and reduce the space occupied by equipment.

[0037] In addition, the traditional battery packaging structure needs to process silver grid lines on the outside of the battery structure layer through the screen printing process to form electrodes, which requires the use of silver paste and screen printing equipment, and the cost of raw materials and equipment is high. The present invention proposes a new packaging structure for batteries, in which a conductive member 2 is arranged between the first packaging board 1 and the battery structure layer, and a conductive layer 4 is arranged between the second packaging board 5 and the battery structure layer, so that the conductive member 2 and the conductive layer 4 are used as electrodes, the process is simple, and copper materials can be directly used as the conductive member 2 and the conductive layer 4, avoiding the use of silver paste and screen printing equipment, and greatly reducing costs.

[0038] The material of the conductive member 2 and the conductive layer 4 may be, but is not limited to, copper.

[0039] In the embodiment of the present invention, a receiving groove 15 is provided on the working surface of the first packaging board 1 , the extending direction of the receiving groove 15 is parallel to the working surface of the first packaging board 1 , and the two ends of the receiving groove 15 respectively pass through the first side surface and the second side surface of the first packaging board 1 .

[0040] In some embodiments, the first side surface and the second side surface of the first package board 1 are arranged opposite to each other, that is, the first side surface and the second side surface are two opposite sides of the first package board 1. In this case, the receiving groove 15 can be set to a straight line shape for easy processing. Moreover, the suspended portion 3 and the plug hole 6 of the battery are respectively located at the opposite ends thereof, and this type of battery is called a first type battery. When multiple first type batteries are connected in series, the multiple first batteries are distributed along a straight line.

[0041] In some other embodiments, the first side surface of the first packaging board 1 is arranged adjacent to the second side surface, that is, the first side surface and the second side surface are two adjacent side surfaces of the first packaging board 1. In this case, the receiving groove 15 can be set to be bent or arc-shaped. Taking the first packaging board 1 with a rectangular working surface as an example, the receiving groove 15 includes a first receiving groove portion and a second receiving groove portion that are connected. The extension direction of the first receiving groove portion is parallel to the length direction of the rectangle, and the extension direction of the second receiving groove portion is parallel to the width direction of the rectangle. The suspended portion 3 and the plug-in hole 6 of the battery are respectively located on two adjacent side surfaces thereof. This type of battery is called a second type battery. When two second type batteries are connected in series, the length directions of the two second type batteries are perpendicular to each other.

[0042] When connecting to form a battery assembly, a portion of the batteries may be selected as the first type of battery, and another portion of the batteries may be selected as the second type of battery. The combination of the two types of batteries can facilitate the arrangement of the distribution positions of the individual batteries.

[0043] The conductive member 2 is embedded in the receiving groove 15, and the first end of the conductive member 2 is extended out of the receiving groove 15, while the second end of the conductive member 2 is located in the receiving groove 15, that is, the second end of the conductive member 2 is located between the two ends of the receiving groove 15 along its own extension direction. The end of the receiving groove 15 away from the first end of the conductive member 2 is not filled with the conductive member 2. The position of the receiving groove 15 where the conductive member 2 is not set is called an empty groove portion, and the side wall of the empty groove portion is also covered with a battery structure layer.

[0044] The thickness of the battery structure layer at each position is consistent, so that a groove is also formed at the position of the conductive layer 4 corresponding to the empty groove portion, and the above-mentioned plug-in hole 6 is formed when the groove is connected to the second packaging board 5.

[0045] In the embodiment of the present invention, at least two receiving grooves 15 are provided on the working surface of the first packaging board 1, and the extension directions of the receiving grooves 15 are parallel to each other. The conductive member 2 includes at least two metal wires 7, and each receiving groove 15 is provided with a corresponding metal wire 7. Each metal wire 7 is arranged in the receiving groove 15, so that the relative stability of the first packaging board 1 and the second packaging board 5 can be improved.

[0046] When the conductive member 2 is disposed on the first packaging board 1, a glue film may be coated on the first packaging board 1 at a position corresponding to the conductive member 2, and then the conductive member 2 and the first packaging board 1 may be fixed together by hot pressing. For example, a glue film may be coated on the bottom wall of the receiving groove 15, and then the metal wire 7 may be arranged in the receiving groove 15 for hot pressing.

[0047] Similarly, when the second packaging board 5 is set on the conductive layer 4, a glue film can be coated on the position of the second packaging board 5 corresponding to the conductive layer 4, and then the conductive layer 4 and the second packaging board 5 are fixed together by hot pressing, so that the second packaging board 5 and the first packaging board 1 are fixed together.

[0048] In the embodiment of the present invention, the battery further comprises a support plate 8, which is used to support the suspended portion 3 of the conductive member 2, and the suspended portion 3 of the conductive member 2 is relatively fixed to the support plate 8. The plug hole 6 can be used for the suspended portion 3 of the conductive member 2 and the support plate 8 to extend therein.

[0049] The provision of the support plate 8 can increase the stability of the conductive member 2 and reduce the deformation of the conductive member 2, so that the support plate 8 and the suspended portion 3 of the conductive member 2 can be smoothly inserted into the plug hole 6, which is convenient for operation.

[0050] The above-mentioned support plate 8 can be fixedly arranged on one of the first packaging board 1 and the second packaging board 5. The support plate 8 can be fixedly connected to the first packaging board 1, or fixedly connected to the second packaging board 5, as long as the support plate 8 can support the conductive part 2 and the support plate 8 does not affect the electrical contact between the first end of the conductive part 2 and the conductive layer 4 in the plug hole 6.

[0051] When the conductive member 2 includes at least two metal wires 7, a support plate 8 can be configured for each metal wire 7, and the corresponding support plate 8 is used to support the corresponding metal wire 7. At this time, multiple plug holes 6 are also provided, and the number of plug holes 6 is the same as the number of metal wires 7, and the plug holes 6 correspond to the metal wires 7 one by one. Each metal wire 7 and the corresponding support plate 8 of one battery can be respectively extended into each plug hole 6 of the other battery, and the metal wire 7 and the support plate 8 are adapted to the corresponding plug hole 6, which can improve the relative stability of the two batteries, improve the stability of the battery assembly, and avoid the problem of poor contact caused by shaking.

[0052] When the conductive member 2 includes at least two metal wires 7, each metal wire 7 can correspond to one supporting plate 8, that is, each metal wire 7 is supported by the same supporting plate 8. Figure 3 At this time, a connecting hole 9 is also provided on the first packaging board 1, and the connecting hole 9 connects each plug hole 6 so that the supporting board 8 and each metal wire 7 can be inserted as a whole.

[0053] The above-mentioned receiving groove 15 and the connecting groove can be completed by using laser grooving technology.

[0054] The above-mentioned battery structure layers are perovskite battery layer, heterojunction battery layer (HJT battery for short), passivated emitter and back battery layer (PERC battery for short), full back contact battery (ABC battery for short), cross back contact battery (XBC battery for short) or stacked battery.

[0055] Taking the battery structure layer as a perovskite battery layer as an example, the preparation process of the battery is described. The perovskite battery layer includes a first transparent conductive layer 10, an electron transport layer 11, a perovskite active layer 12, a hole transport layer 13, and a second transparent conductive layer 14. After the conductive member 2 is fixed in the receiving groove 15 of the first packaging board 1, the first transparent plate conductive layer 4 can be processed at the exposed position of the first packaging board 1 and the conductive member 2, and then the electron transport layer 11, the perovskite active layer 12, the hole transport layer 13, and the second transparent conductive layer 14 are processed in sequence on the side of the first transparent conductive layer 10 away from the first packaging board 1. Then, the conductive layer 4 is processed on the side of the second transparent conductive layer 14 away from the hole transport layer 13, and a second packaging board 5 is set.

[0056] Thus, the first transparent conductive layer 10 is disposed adjacent to the electron transport layer 11, the conductive member 2 is in electrical contact with the first transparent conductive layer 10, and the conductive member 2 serves as the negative electrode of the battery. The second transparent conductive layer 4 is disposed adjacent to the hole transport layer 13, the conductive layer 4 is in electrical contact with the second transparent conductive layer 14, and the conductive layer 4 serves as the positive electrode of the battery.

[0057] The first transparent conductive layer 10, the electron transport layer 11, the perovskite active layer 12, the hole transport layer 13 and the second transparent conductive layer 14 can all be formed by a physical vapor deposition (PVD) process.

[0058] The first packaging plate 1 and the second packaging plate 5 can be, but are not limited to, glass plates, and the thickness of the first packaging plate 1 and the second packaging plate 5 are both about 3 mm. The thickness of the first transparent conductive layer 10 is 60-120 nanometers, the thickness of the electron transport layer 11 is 10-50 nanometers, the thickness of the perovskite active layer 12 is 60-80 nanometers, the thickness of the hole transport layer 13 is 10-50 nanometers, the thickness of the second transparent conductive layer 14 is 60-120 nanometers, and the thickness of the conductive layer 4 is 20-100 nanometers.

[0059] In summary, the battery provided by the embodiment of the present invention has a simple structure, avoids processes such as texturing, etching, and metallization, shortens the industrial chain, reduces consumables, and reduces the cost of photovoltaic cells. Moreover, the number of batteries required for the battery assembly can be determined according to the power generation demand, which has strong flexibility.

[0060] On the other hand, based on the same general inventive concept, an embodiment of the present invention further provides a method for manufacturing a battery. The method for manufacturing a battery described below and the battery described above can refer to each other.

[0061] like Figures 5 to 7 As shown, a method for manufacturing a battery provided by an embodiment of the present invention mainly includes steps 110 to 140.

[0062] Step 110 , disposing a conductive member on the working surface side of the first packaging board, so that a first end of the conductive member extends to the outside of the first packaging board to form a suspended portion.

[0063] Step 120 , processing the battery structure layer on the working surface of the first packaging board and on the side of the conductive member away from the first packaging board.

[0064] Step 130: Processing a conductive layer on a side of the battery structure layer away from the first packaging plate.

[0065] Step 140: Arrange a second packaging board on the side of the conductive layer away from the battery structure layer, and form a plug hole between the side of the battery structure layer away from the first packaging board and the second packaging board, wherein the plug hole is matched with the suspended portion of the conductive member.

[0066] With such arrangement, in the battery prepared by the above steps, the conductive layer 4 and the conductive member 2 are respectively located on both sides of the battery structure layer, and can be used as the positive and negative electrodes of the battery respectively. By arranging the conductive member 2, a convex suspended portion 3 and a concave plug hole 6 are formed on the battery. When two batteries are connected, the suspended portion 3 of one battery is plugged into the plug hole 6 of the other battery, so that the suspended portion 3 of the conductive member 2 can be electrically connected to the conductive layer 4, thereby realizing the series connection of the two batteries, which is simple to operate. Moreover, the plug-in connection between the suspended portion 3 and the plug hole 6 is a detachable connection, which is easy to disassemble, thereby solving the problem that the series connection operation between solar cells in the related art is complicated, and the solar cell assembly formed in series is not easy to disassemble.

[0067] In addition, the battery manufactured by the battery manufacturing method provided by the embodiment of the present invention can determine the number of batteries required for the battery assembly according to the power generation demand, and has strong flexibility.

[0068] It should be noted that the traditional battery assembly production process is to arrange and connect the required number of battery structure layers before encapsulating the whole, and a special assembly production line needs to be configured at the production site. The battery provided by the present invention is a packaged battery cell, and the packaging is completed while the battery cell is processed. And the electrical connection between two battery cells can be completed on the outside of the battery cell. When the battery assembly is formed in series, the required number of battery cells can be connected according to the requirements of the battery assembly. Compared with the structure and production process of the traditional battery assembly, the present invention can eliminate the assembly production line, reduce production costs, and reduce the space occupied by equipment.

[0069] In addition, the traditional battery packaging structure needs to process silver grid lines on the outside of the battery structure layer through the screen printing process to form electrodes, which requires the use of silver paste and screen printing equipment, and the cost of raw materials and equipment is high. The present invention proposes a new packaging structure for batteries, in which a conductive member 2 is arranged between the first packaging board 1 and the battery structure layer, and a conductive layer 4 is arranged between the second packaging board 5 and the battery structure layer, so that the conductive member 2 and the conductive layer 4 are used as electrodes, the process is simple, and copper materials can be directly used as the conductive member 2 and the conductive layer 4, avoiding the use of silver paste and screen printing equipment, and greatly reducing costs.

[0070] In this embodiment, the above step 110, that is, the step of disposing a conductive member on the working surface side of the first packaging board so that the first end of the conductive member extends to the outside of the first packaging board to form a suspended portion, includes steps 111 to 113.

[0071] Step 111, processing a receiving groove on the working surface of the first packaging board, wherein the extending direction of the receiving groove is parallel to the working surface of the first packaging board, and the two ends of the receiving groove respectively penetrate the first side surface and the second side surface of the first packaging board, and the first side surface and the second side surface are arranged opposite to or adjacent to each other.

[0072] Step 112: placing the conductive member in the receiving groove, so that the first end of the conductive member is located outside the first packaging board, and the second end of the conductive member is located inside the receiving groove.

[0073] Step 113: fix the conductive member and the first packaging board by heat pressing.

[0074] Specifically, the receiving groove 15 is first processed on the working surface of the first packaging board 1, and then the conductive member 2 is placed in the receiving groove 15 as required, and then the conductive member 2 and the first packaging board 1 are fixed by hot pressing, which can improve the relative stability of the conductive member 2 and the first packaging board 1.

[0075] When the conductive member 2 is disposed on the first packaging board 1, a glue film may be coated on the first packaging board 1 at a position corresponding to the conductive member 2, and then the conductive member 2 and the first packaging board 1 may be fixed together by hot pressing. For example, a glue film may be coated on the bottom wall of the receiving groove 15, and then the metal wire 7 may be arranged in the receiving groove 15 for hot pressing.

[0076] The above-mentioned battery structure layers are perovskite battery layer, heterojunction battery layer (HJT battery for short), passivated emitter and back battery layer (PERC battery for short), full back contact battery (ABC battery for short), cross back contact battery (XBC battery for short) or stacked battery.

[0077] Taking the battery structure layer as a perovskite battery layer as an example, the above step 120, that is, the step of processing the battery structure layer on the working surface of the first packaging board and the side of the conductive member away from the first packaging board, is described. The above step 120 includes steps 121 to 125.

[0078] Step 121 : Processing a first transparent conductive layer on a working surface of a first packaging board and a side of a conductive member away from the first packaging board.

[0079] Step 122 : processing an electron transport layer on a side of the first transparent conductive layer away from the first packaging plate.

[0080] Step 123 : Processing a perovskite active layer on a side of the electron transport layer away from the first transparent conductive layer.

[0081] Step 124 , processing a hole transport layer on a side of the perovskite active layer away from the electron transport layer.

[0082] Step 125 , processing a second transparent conductive layer on a side of the hole transport layer away from the perovskite active layer.

[0083] After the conductive member 2 is fixed in the receiving groove 15 of the first packaging board 1, the first transparent conductive layer 4 can be processed at the exposed position of the first packaging board 1 and the conductive member 2, and then the electron transport layer 11, the perovskite active layer 12, the hole transport layer 13 and the second transparent conductive layer 14 can be processed in sequence on the side of the first transparent conductive layer 10 away from the first packaging board 1. Then, the conductive layer 4 is processed on the side of the second transparent conductive layer 14 away from the hole transport layer 13, and the second packaging board 5 is set.

[0084] Thus, the first transparent conductive layer 10 is disposed adjacent to the electron transport layer 11, the conductive member 2 is in electrical contact with the first transparent conductive layer 10, and the conductive member 2 serves as the negative electrode of the battery. The second transparent conductive layer 4 is disposed adjacent to the hole transport layer 13, the conductive layer 4 is in electrical contact with the second transparent conductive layer 14, and the conductive layer 4 serves as the positive electrode of the battery.

[0085] The first transparent conductive layer 10, the electron transport layer 11, the perovskite active layer 12, the hole transport layer 13 and the second transparent conductive layer 14 can all be formed by a physical vapor deposition (PVD) process.

[0086] On the other hand, based on the same general inventive concept, an embodiment of the present invention further provides a battery assembly, including the battery provided in the above embodiment or a battery manufactured by the method for manufacturing the battery provided in the above embodiment. The battery and its manufacturing method provided in the above embodiment avoid the use of silver paste and screen printing equipment, and cancel the setting of the assembly production line, thereby reducing costs, and simplifying the series connection mechanism between the two batteries. The series connection operation is simple and easy to disassemble after the series connection. Therefore, the battery assembly provided in this embodiment has the advantages of low production cost, convenient assembly, and easy disassembly. The derivation process of the beneficial effects of the battery assembly in the embodiment of the present invention is generally similar to the derivation process of the beneficial effects of the above-mentioned battery or the method for manufacturing the battery, so it will not be repeated here.

[0087] On the other hand, the embodiment of the present invention further provides a battery module, including the battery provided in the above embodiment, or including the battery manufactured by the method for manufacturing the battery provided in the above embodiment, or including the battery assembly provided in the above embodiment. It has all the advantages of the above battery or the method for manufacturing the battery or the battery assembly. The derivation process of the beneficial effects of the battery module in the embodiment of the present invention is generally similar to the derivation process of the beneficial effects of the above battery or the method for manufacturing the battery or the battery assembly, so it will not be repeated here.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery, characterized in that: include: A first packaging board (1); A conductive member (2) is arranged on the working surface side of the first packaging board (1), and a first end of the conductive member (2) extends to the outside of the first packaging board (1) to form a suspended portion (3); A battery structure layer, at least covering the working surface of the first packaging plate (1) and a side of the conductive member (2) away from the first packaging plate (1); A conductive layer (4) is arranged on a side of the battery structure layer away from the first packaging plate (1); A second packaging plate (5) is arranged on a side of the conductive layer (4) away from the battery structure layer, the second packaging plate (5) is fixed relative to the first packaging plate (1), a plug hole (6) is formed between the side of the battery structure layer away from the first packaging plate (1) and the second packaging plate (5), and the plug hole (6) is adapted to the suspended portion (3) of the conductive member (2).

2. The battery according to claim 1, characterized in that The working surface of the first packaging board (1) is provided with a receiving groove (15), the extending direction of the receiving groove (15) is parallel to the working surface of the first packaging board (1), the two ends of the receiving groove (15) respectively penetrate the first side surface and the second side surface of the first packaging board (1), and the first side surface and the second side surface are arranged opposite to each other or adjacent to each other; The conductive member (2) is embedded in the accommodating groove (15), and the second end of the conductive member (2) is located in the accommodating groove (15), so that the accommodating groove (15) forms an empty groove portion on a side of the second end of the conductive member (2) away from the first end thereof, and the side wall of the empty groove portion is covered with the battery structure layer.

3. The battery according to claim 2, characterized in that The working surface of the first packaging plate (1) is provided with at least two accommodating grooves (15), and the extension directions of the accommodating grooves (15) are parallel to each other; The conductive member (2) comprises at least two metal wires (7), and each of the accommodating grooves (15) is provided with a corresponding metal wire (7).

4. The battery according to any one of claims 1 to 3, characterized in that: The battery structure layer is a perovskite battery layer, a heterojunction battery layer, a tunneling oxide layer passivation contact battery layer, a passivation emitter and back battery layer, a full back contact battery, a cross back contact battery or a stacked battery.

5. The battery according to any one of claims 1 to 3, characterized in that: Also includes: A support plate (8) is fixedly arranged on one of the first packaging plate (1) and the second packaging plate (5), the support plate (8) is suitable for supporting the suspended portion (3) of the conductive member (2), the suspended portion (3) of the conductive member (2) and the support plate (8) are relatively fixed, and the plug hole (6) is suitable for allowing the suspended portion (3) of the conductive member (2) and the support plate (8) to extend therein.

6. The battery according to claim 5, characterized in that The conductive member (2) comprises at least two metal wires (7), each of the metal wires (7) is provided with a corresponding support plate (8), and the number of the plug holes (6) is the same as the number of the metal wires (7); Alternatively, the conductive member (2) comprises at least two metal wires (7), each of the metal wires (7) corresponds to one of the support plates (8), and the first packaging plate (1) is further provided with a connecting hole (9), the connecting hole (9) connecting each of the plug holes (6) to allow the support plate (8) and each of the metal wires (7) to be inserted.

7. A method for manufacturing a battery, characterized in that: include: A conductive member is arranged on the working surface side of the first packaging board, so that a first end of the conductive member extends out of the first packaging board to form a suspended portion; Processing a battery structure layer on a working surface of the first packaging board and a side of the conductive member away from the first packaging board; Processing a conductive layer on a side of the battery structure layer away from the first packaging plate; A second packaging board is arranged on a side of the conductive layer away from the battery structure layer, and a plug hole is formed between the side of the battery structure layer away from the first packaging board and the second packaging board, wherein the plug hole is matched with the suspended portion of the conductive member.

8. The method for manufacturing a battery according to claim 7, characterized in that: The step of providing a conductive member on the working surface side of the first packaging board comprises: A receiving groove is processed on the working surface of the first packaging board, the extending direction of the receiving groove is parallel to the working surface of the first packaging board, the two ends of the receiving groove respectively penetrate the first side surface and the second side surface of the first packaging board, and the first side surface is arranged opposite to or adjacent to the second side surface; Placing the conductive member in the receiving groove so that the first end of the conductive member is located outside the first packaging board and the second end of the conductive member is located inside the receiving groove; The conductive member is fixed to the first packaging board by heat pressing.

9. A battery assembly, characterized in that: The invention comprises at least two batteries, wherein the batteries are the batteries as described in any one of claims 1 to 6, or the batteries are manufactured by the manufacturing method of the batteries as described in any one of claims 7 to 8.

10. A battery module, characterized in that: It comprises a battery as described in any one of claims 1 to 6, or a battery manufactured by the method for manufacturing a battery as described in any one of claims 7 to 8, or a battery assembly as described in claim 9.

Images