Battery piece unit, battery assembly and power station device

Abstract

The utility model relates to the technical field of batteries, in particular to a battery piece unit, a battery assembly and a power station device. The battery piece units are used for being mutually connected to form the battery assembly and comprise battery pieces, the battery pieces are provided with first pole faces and second pole faces, and the first pole faces and the second pole faces are oppositely arranged in the first direction; the first electrode is electrically connected with the first pole surface; the second electrode is electrically connected with the second pole surface; in the second direction, the first electrode and the second electrode are arranged on the two opposite sides of the battery piece respectively. When the battery piece units are damaged, the damaged battery piece units can be directly disassembled and replaced, so that the normal use of the battery assembly is not influenced, and the situation that the whole assembly is scrapped and cannot work normally is avoided.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell unit, a battery assembly, and a power station device. Background Art

[0002] As people pay more and more attention to environmental issues, the research and development of clean energy has become a consensus. Solar energy, as a renewable energy source, has been widely studied. Usually, solar energy is recycled through solar panels.

[0003] However, in traditional solar panels currently on the market, the cells in the battery module are connected by welding wire, conductive glue or lap welding, and the battery string is fixed to the front and back panels with packaging film. During long-term use, if the battery module develops hot spots or other defects, it cannot be repaired, resulting in the scrapping of the entire battery module. Utility Model Content

[0004] Based on this, the present application provides a battery cell unit, a battery assembly and a power station device to solve the problem that existing battery assemblies cannot be repaired when hot spots or hidden cracks occur.

[0005] In one aspect, the present application provides a battery cell unit for interconnecting to form a battery assembly, comprising:

[0006] A battery cell, the battery cell having a first pole surface and a second pole surface, wherein the first pole surface and the second pole surface are arranged opposite to each other along a first direction;

[0007] a first electrode, the first electrode being electrically connected to the first electrode surface;

[0008] a second electrode, the second electrode being electrically connected to the second electrode surface;

[0009] Along the second direction, the first electrode and the second electrode are respectively arranged on two opposite sides of the battery cell.

[0010] In a possible implementation, a first gate line is provided on the first electrode surface, a second gate line is provided on the second electrode surface, the first electrode is electrically connected to the first gate line, and the second electrode is electrically connected to the second gate line.

[0011] In a possible implementation, a first connection structure is provided on the first electrode, and a second connection structure is provided on the second electrode. The first connection structure cooperates with the second connection structure on an adjacent battery cell unit to connect two adjacent battery cell units.

[0012] In a possible implementation, one of the first connecting structure and the second connecting structure is provided with a recessed portion, and the other is provided with a convex portion, and the convex portion and the recessed portion cooperate with each other.

[0013] In a possible implementation, one of the first connection structure and the second connection structure is a bayonet, and the other is a buckle.

[0014] In a possible implementation, along the third direction, on adjacent battery cell units, the opposite first electrodes and second electrodes are correspondingly arranged.

[0015] In a possible implementation, the battery cell unit further includes a front plate, and the front plate is disposed on one side of the battery cell along the first direction.

[0016] In a possible implementation, the battery cell unit further includes a first adhesive layer, and the first adhesive layer connects the front plate and the battery cell.

[0017] In a possible implementation, the front plate is a transparent member.

[0018] In a possible implementation, the battery cell unit further includes a back plate, and along the first direction, the back plate is disposed on a side of the battery cell away from the front plate.

[0019] In a possible implementation, the battery cell unit further includes a second adhesive layer, and the second adhesive layer connects the back plate and the battery cell.

[0020] On the other hand, the present application provides a battery assembly including a plurality of battery strings, wherein the battery strings are formed by sequentially arranging a plurality of the above-mentioned battery cell units, and adjacent battery cell units are connected.

[0021] In one possible implementation, multiple battery strings are electrically connected via wires.

[0022] On the other hand, the present application provides a power station device, including the above-mentioned battery cell unit or the above-mentioned battery assembly.

[0023] The battery cell units, battery assemblies, and power station devices provided herein form a battery assembly by disposing first and second electrodes on opposite sides of the battery cell, respectively, and converging the electricity on the first and second electrode surfaces to the first and second electrodes, respectively. The first and second electrodes on adjacent battery cell units are then connected, thereby forming a battery assembly. If a battery cell unit is damaged, the damaged cell unit can be directly removed and replaced, without affecting the normal use of the battery assembly and preventing the entire assembly from being scrapped and malfunctioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 A schematic diagram of a partially exploded structure of a battery cell unit provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 A schematic structural diagram of the battery cell unit from another perspective;

[0027] Figure 3 for Figure 1 A structural schematic diagram of the battery cell unit from another perspective;

[0028] Figure 4 for Figure 1 The schematic structural diagram of the battery cell unit from another perspective;

[0029] Figure 5 A schematic diagram of the structure of the battery assembly provided in an embodiment of the present application.

[0030] Description of reference numerals:

[0031] 100-battery cell unit; 10-battery cell; 11-first pole surface; 12-second pole surface; 13-first grid line; 14-second grid line; 20-first electrode; 30-second electrode; 40-connection structure; 41-clip; 42-clip; 50-front plate; 60-first adhesive layer; 70-back plate; 80-second adhesive layer; 200-battery assembly; 201-battery string; 202-wire. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0034] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0035] The terms "first", "second" and "third" (if any) in the description and claims of this application and the above drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0036] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or display that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product or display.

[0037] As people pay more and more attention to environmental issues, the research and development of clean energy has become a consensus. Solar energy, as a renewable energy source, has been widely studied. Usually, solar energy is recycled through solar panels.

[0038] However, in traditional solar panels currently on the market, the cells in the battery module are connected by welding wire, conductive glue or lap welding, and the battery string is fixed to the front and back panels with packaging film. During long-term use, if the battery module develops hot spots or other defects, it cannot be repaired, resulting in the scrapping of the entire battery module.

[0039] After repeated thinking and verification, the inventors found that if the electrodes of the battery cells are set on the side of the battery cells, by converging the current on the large surface of the battery cells to the side electrodes, the connection between the battery cells can be achieved through conductive connection of the side electrodes, or even through direct contact. When a single battery cell is damaged, the damaged battery cell can be directly removed and replaced, which will not affect the normal use of the battery assembly and will not cause the entire assembly to be scrapped.

[0040] In view of this, the present application provides a battery cell unit for interconnecting to form a battery assembly, comprising:

[0041] A battery cell, the battery cell having a first pole surface and a second pole surface, wherein the first pole surface and the second pole surface are arranged opposite to each other along a first direction;

[0042] a first electrode, the first electrode being electrically connected to the first electrode surface;

[0043] a second electrode, the second electrode being electrically connected to the second electrode surface;

[0044] Along the second direction, the first electrode and the second electrode are respectively arranged on two opposite sides of the battery cell.

[0045] By placing the first and second electrodes on either side of the battery cell, and by merging the electricity on the first and second electrode surfaces onto the first and second electrodes, the first and second electrodes on adjacent battery cell units can be connected, thereby forming a battery assembly. If a battery cell unit is damaged, the damaged cell unit can be directly removed and replaced, without affecting the normal use of the battery assembly or causing the entire assembly to become scrapped and unable to function properly.

[0046] The contents of this application will be described in detail below with reference to the accompanying drawings so that those skilled in the art can understand the contents of this application more clearly and in detail.

[0047] Figure 1 A schematic diagram of the partially exploded structure of the battery cell unit provided in an embodiment of the present application. Figure 2 for Figure 1 A structural schematic diagram of the battery cell unit from another perspective is shown. Figure 3 for Figure 1 The structure diagram of the battery cell unit shown is from another perspective. Figure 4 for Figure 1 The structure diagram of the battery cell unit shown is from another perspective. Figure 5 A schematic diagram of the structure of the battery assembly provided in an embodiment of the present application.

[0048] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a battery cell unit 100 for interconnecting to form a battery assembly 200. The battery cell unit 100 includes a battery cell 10, a first electrode 20, and a second electrode 30. The first electrode 20 and the second electrode 30 are respectively provided on both sides of the battery cell 10.

[0049] like Figures 2 to 4As shown, the cell 10 has a first electrode surface 11 and a second electrode surface 12. Along a first direction x, the first electrode surface 11 and the second electrode surface 12 are disposed opposite each other. The first electrode surface 11 is electrically connected to the first electrode 20, and the second electrode surface 12 is electrically connected to the second electrode 30.

[0050] The first direction x is the thickness direction of the battery cell 10 .

[0051] A first grid line 13 is provided on the first pole surface 11 , and a second grid line 14 is provided on the second pole surface 12 . The first grid line 13 is used to converge the current on the first pole surface 11 , and the second grid line 14 is used to converge the current on the second pole surface 12 .

[0052] The first gate line 13 extends to the side of the battery cell 10 and is electrically connected to the first electrode 20 , thereby converging the current on the first electrode surface 11 to the first electrode 20 .

[0053] The second gate line 14 extends to the side of the battery cell 10 and is electrically connected to the second electrode 30 , thereby converging the current on the second electrode surface 12 to the second electrode 30 .

[0054] In a possible implementation, the cell 10 is a cell of a solar cell, which converts solar energy into direct current electricity through the photovoltaic voltage of a PN junction.

[0055] In one possible implementation, the cell 10 can be a cell used in single crystal silicon, polycrystalline silicon solar cells, amorphous silicon thin film, multi-compound thin film solar cells, new inorganic semiconductor thin film solar cells, dye-sensitized solar cells, organic compound solar cells, perovskite solar cells, etc.

[0056] Along the second direction y, the first electrode 20 and the second electrode 30 are respectively disposed on opposite sides of the battery cell 10 , that is, the first electrode 20 is disposed on one side of the battery cell 10 , and the second electrode 30 is disposed on a side of the battery cell 10 away from the first electrode 20 .

[0057] In a possible implementation, the second direction y is perpendicular to the first direction x.

[0058] The present application changes the electrodes provided on the two large surfaces of the battery cell in the existing battery cell unit to first electrodes 20 and second electrodes 30 respectively provided on both sides of the battery cell 10, and respectively connects the electricity on the first electrode surface 11 and the second electrode surface 12 to the first electrode 20 and the second electrode 30 through the first gate line 13 and the second gate line 14.

[0059] The cells do not require conventional welding wires, stacking, or conductive adhesive to connect them. Instead, the battery assembly is connected through the contact between the first and second electrodes 20, 30 on the sides of the cell 10, forming a circuit connection that enables electron transmission. If a cell unit 100 is damaged, it can be easily removed without the entire assembly being scrapped.

[0060] At the same time, since the electrodes are moved from the first pole surface 11 and the second pole surface 12 to the side of the battery cell 10, compared with the existing technology, the blocked area on the first pole surface 11 and the second pole surface 12 is reduced. At the same time, the thicker main grid lines used to connect the electrodes on the first pole surface 11 and the second pole surface 12 can be changed to thinner grid lines, further reducing the blocked area, thereby improving the light conversion efficiency of the first pole surface 11 and the second pole surface 12, and thus improving the power generation efficiency.

[0061] In a possible implementation, a connection structure 40 is provided on the first electrode 20 and the second electrode 30 . The connection structure 40 is used to connect the first electrode 20 and the second electrode 30 on two battery cell units 100 to each other, thereby connecting two adjacent battery cell units 100 .

[0062] By providing the connection structure 40 on the first electrode 20 and the second electrode 30 , the stability of the connection between the first electrode 20 and the second electrode 30 can be improved.

[0063] The first electrodes 20 and the second electrodes 30 on adjacent battery cell units 100 may be connected via a connection structure 40 to form a battery assembly 200 .

[0064] When the battery cell unit 100 is damaged, the damaged battery cell unit 100 can be directly removed, replaced and reconnected directly through the connection structure 40, so as not to affect the normal use of the battery assembly 200, and the entire assembly will not be scrapped and unable to work normally.

[0065] In one possible implementation, the connection structure 40 includes a first connection structure and a second connection structure. The first connection structure is provided on the first electrode 20, and the second connection structure is provided on the second electrode 30. The first connection structure cooperates with the second connection structure on the adjacent battery cell unit 100 to interconnect the first electrode 20 and the second electrode 30 on the adjacent battery cell unit 100, thereby connecting the two adjacent battery cell units 100.

[0066] In a possible implementation, one of the first connecting structure and the second connecting structure is provided with a recessed portion, and the other is provided with a convex portion, and the convex portion and the recessed portion cooperate with each other.

[0067] In a possible implementation, one of the first connection structure and the second connection structure is a bayonet 41, and the other is a buckle 42. The bayonet 41 and the buckle 42 cooperate with each other to connect the first electrode 20 and the second electrode 30.

[0068] In a possible implementation, the bayonet 41 is provided on the first electrode 20 , and the buckle 42 is provided on the second electrode 30 .

[0069] The buckle 42 is accommodated in the bayonet 41 , so that the first electrode 20 is fixedly connected to the second electrode 30 , and the first electrode 20 is in contact with the second electrode 30 to achieve conduction.

[0070] In a possible implementation, the buckle 42 is provided on the first electrode 20 , and the bayonet 41 is provided on the second electrode 30 .

[0071] In one possible implementation, a snap 41 may be provided on the first electrode 20 and the second electrode 30 of some battery cell units 100, and a snap 42 may be provided on the first electrode 20 and the second electrode 30 of other battery cell units 100, and the two types of battery cell units 100 may be used alternately, so that the first electrode 20 and the second electrode 30 of two adjacent battery cell units 100 are connected via the snap 41 and the snap 42.

[0072] In one possible implementation, the connection structure 40 can also be other connection structures that are easy to disassemble, such as a mortise and tenon structure, a matching structure of a connection hole and a connection column, etc., as long as it can facilitate the connection between the first electrode 20 and the second electrode 30 and can be removed and replaced at the same time.

[0073] In a possible implementation, along the third direction, on adjacent battery cell units 100 , the opposing first electrodes 20 and second electrodes 30 are correspondingly disposed, thereby increasing the arrangement density of the battery assembly 200 .

[0074] In a possible implementation, along the third direction z, the first electrode 20 is disposed in the middle of the battery cell 10 , and the second electrode 30 is disposed in the middle of the battery cell 10 .

[0075] The first electrode 20 and the second electrode 30 provided in the middle can prevent the battery cell unit 100 from contacting other parts when the battery cell unit 100 is connected, thereby preventing problems such as short circuits. At the same time, the arrangement density of the battery cell units 100 connected in sequence can be increased.

[0076] In a possible implementation, along the third direction z, the first electrode 20 and the second electrode 30 may also be respectively disposed on the same side of the battery cell 10 .

[0077] In one possible implementation, in some battery cell units 100, the first electrode 20 is arranged on one side of the battery cell 10, and the second electrode 30 is arranged on the other side of the battery cell 10; in other battery cell units 100, the first electrode 20 is arranged on the other side of the battery cell 10, and the second electrode 30 is arranged on one side of the battery cell 10. The two types of battery cell units 100 are used alternately, so that the first electrode 20 and the second electrode 30 of two adjacent battery cell units 100 are connected on one side of the battery cell 10.

[0078] In one possible implementation, the battery cell unit 100 further includes a front plate 50. The front plate 50 is disposed on one side of the battery cell 10 along the first direction x. The front plate 50 is used to protect the battery cell 10 and prevent the battery cell 10 from being corroded by the external environment.

[0079] In a possible implementation, the front panel 50 is a transparent member, which can effectively improve the utilization efficiency of solar light.

[0080] The front plate 50 covers the front surface of the battery cell 10 and constitutes the outermost layer of the battery cell unit 100. The front plate 50 needs to have high light transmittance and be strong.

[0081] In a possible implementation, the material of the front panel 50 includes but is not limited to various types of glass, light-transmitting organic materials, such as tempered glass, polyacrylic resin, fluorinated ethylene propylene, transparent polyester, polycarbonate, etc.

[0082] In a possible implementation, the battery cell unit 100 further includes a first adhesive layer 60. The first adhesive layer 60 is disposed between the front plate 50 and the battery cell 10. The first adhesive layer 60 is used to connect the front plate 50 and the battery cell 10.

[0083] The first adhesive layer 60 is required to have high light transmittance, elasticity and good electrical insulation properties.

[0084] In a possible implementation, the material of the first adhesive layer 60 includes but is not limited to various types of EVA (ethylene-vinyl acetate copolymer), EPE (Expandable Polyethylene), POE (Polyolefin Elastomer) and other organic materials.

[0085] In a possible implementation, the battery cell unit 100 further includes a back plate 70. Along the first direction x, the back plate 70 is disposed on a side of the battery cell 10 away from the front plate 50. The back plate 70 is used to protect the battery cell 10 from the other side.

[0086] The back plate 70 covers the back side of the battery cell 10 and constitutes the outermost layer of the battery cell unit 100 . The back plate 70 needs to have a strong structure and be firmly bonded with the adhesive material to facilitate the fixation of the battery cell unit 100 .

[0087] In a possible implementation, the material of the back panel 70 includes but is not limited to various types of glass, lightweight organic materials, various types of metals, such as tempered glass, aluminum alloy, organic glass, etc.

[0088] When the battery assembly 200 is used on a roof or in other scenarios where fixation is required, adhesives or glue can be used to adhere and fix the back plate 70 of the battery cell unit 100.

[0089] In a possible implementation, the battery cell unit 100 further includes a second adhesive layer 80 . The second adhesive layer 80 is disposed between the back plate 70 and the battery cell 10 , and is used to connect the back plate 70 and the battery cell 10 .

[0090] The battery cell unit 100 provided in the embodiment of the present application includes a battery cell 10, a first electrode 20 and a second electrode 30. The battery cell 10 has a first electrode surface 11 and a second electrode surface 12. Along the first direction x, the first electrode surface 11 and the second electrode surface 12 are arranged opposite to each other, and a first gate line 13 is provided on the first pole surface 11, and a second gate line 14 is provided on the second pole surface 12; along the second direction y, the first electrode 20 is provided on one side of the battery cell 10, and the first electrode 20 is electrically connected to the first gate line 13; along the second direction y, the second electrode 30 is provided on the side of the battery cell 10 away from the first electrode 20, and the second electrode 30 is electrically connected to the second gate line 14.

[0091] By disposing the first electrode 20 and the second electrode 30 on both sides of the battery cell 10, and respectively connecting the electricity on the first electrode surface 11 and the second electrode surface 12 to the first electrode 20 and the second electrode 30 through the first grid line 13 and the second grid line 14, the first electrode 20 and the second electrode 30 on adjacent battery cell units 100 can be connected, thereby forming a battery assembly 200. When a battery cell unit 100 is damaged, the damaged battery cell unit 100 can be directly removed and replaced, thereby not affecting the normal use of the battery assembly 200 and preventing the entire assembly from being scrapped and unable to function normally.

[0092] In addition, if Figure 5 As shown, the embodiment of the present application further provides a battery assembly 200, comprising a plurality of battery strings 201. The battery strings 201 are formed by sequentially arranging a plurality of the above-mentioned battery cell units 100. Adjacent battery cell units 100 are sequentially connected to achieve series connection of the battery strings 201.

[0093] In a possible implementation, adjacent battery cell units 100 are connected via a connection structure 40 .

[0094] In a possible implementation, multiple battery strings 201 are electrically connected via wires 202 .

[0095] Multiple battery strings 201 are connected in parallel via conductors 202 , and current is extracted for use.

[0096] In a possible implementation, the multiple battery strings 201 may be connected via other conductive materials.

[0097] On the other hand, an embodiment of the present application further provides a power station device, including the above-mentioned battery cell unit 100 or the above-mentioned battery assembly 200.

[0098] The specific structure, working principle and function of the battery cell unit 100 have been described in detail in the aforementioned embodiments and will not be repeated here.

[0099] The power station device in the embodiment of the present application may be a solar cell, or may be a power station device that converts other energy sources into electrical energy.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application 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 or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery cell unit, used to connect with each other to form a battery assembly, characterized in that: include: A battery cell (10), the battery cell (10) having a first pole surface (11) and a second pole surface (12), wherein the first pole surface (11) and the second pole surface (12) are arranged opposite to each other along a first direction; a first electrode (20), the first electrode (20) being electrically connected to the first electrode surface (11); a second electrode (30), the second electrode (30) being electrically connected to the second electrode surface (12); Along the second direction, the first electrode (20) and the second electrode (30) are respectively arranged on two opposite sides of the battery cell (10).

2. The battery cell unit according to claim 1, characterized in that: A first gate line (13) is provided on the first pole surface (11), a second gate line (14) is provided on the second pole surface (12), the first electrode (20) is electrically connected to the first gate line (13), and the second electrode (30) is electrically connected to the second gate line (14).

3. The battery cell unit according to claim 1, characterized in that: The first electrode (20) is provided with a first connection structure, the second electrode (30) is provided with a second connection structure, and the first connection structure cooperates with the second connection structure on the adjacent battery cell unit to connect the two adjacent battery cell units.

4. The battery cell unit according to claim 3, characterized in that: One of the first connecting structure and the second connecting structure is provided with a concave portion, and the other is provided with a convex portion, and the convex portion and the concave portion cooperate with each other.

5. The battery cell unit according to claim 4, characterized in that: One of the first connection structure and the second connection structure is a bayonet (41), and the other is a buckle (42).

6. The battery cell unit according to claim 1, characterized in that: Along the third direction, on the adjacent battery cell units, the first electrodes (20) and the second electrodes (30) facing each other are correspondingly arranged.

7. The battery cell unit according to claim 1, characterized in that: The battery cell unit (100) further comprises a front plate (50), and along a first direction, the front plate (50) is arranged on one side of the battery cell (10).

8. The battery cell unit according to claim 7, characterized in that: The battery cell unit (100) further includes a first adhesive layer (60), wherein the first adhesive layer (60) connects the front plate (50) and the battery cell (10).

9. The battery cell unit according to claim 7, characterized in that: The front plate (50) is a transparent piece.

10. The battery cell unit according to claim 7, characterized in that: The battery cell unit (100) further comprises a back plate (70). Along the first direction, the back plate (70) is arranged on a side of the battery cell (10) away from the front plate (50).

11. The battery cell unit according to claim 10, characterized in that: The battery cell unit (100) further includes a second adhesive layer (80), wherein the second adhesive layer (80) connects the back plate (70) and the battery cell (10).

12. A battery assembly, characterized in that: The invention comprises a plurality of battery strings (201), wherein the battery strings (201) are formed by sequentially arranging a plurality of battery cell units (100) according to any one of claims 1 to 11, and adjacent battery cell units (100) are connected.

13. The battery assembly according to claim 12, wherein: The plurality of battery strings (201) are electrically connected via a wire (202).

14. A power station device, characterized in that: The invention comprises a battery cell unit (100) according to any one of claims 1 to 11 or a battery assembly (200) according to any one of claims 12 to 13.

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