Battery module and battery apparatus

Abstract

Disclosed in the present disclosure are a battery module and a battery apparatus. The battery module comprises: a first flexible material layer (1), a second flexible material layer (5) and a battery layer (3); the battery layer (3) comprises a plurality of battery bodies (31) arranged at intervals; the battery layer (3) is located between the first flexible material layer (1) and the second flexible material layer (5); the first flexible material layer (1) and the second flexible material layer (5) form flexible regions (11) at gaps between adjacent battery bodies (31), the second flexible material layer (5) being used for connecting to a component to be mounted, and the flexible regions (11) being adapted to a bending part of the component to be mounted.

Description

Battery components and battery devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to patent application number 202310989968.0, filed August 7, 2023, entitled “BATTERY ASSEMBLY AND BATTERY DEVICE,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of battery technology, and in particular to a battery assembly and a battery device. Background Art

[0004] Power generation assemblies, such as photovoltaic modules, typically consist of solar panels and mounting brackets. The brackets connect the panels together to form a single, planar structure. During installation, the brackets are attached to the component being installed, such as a roof, using clamps. Existing photovoltaic modules have complex structures, requiring high structural strength and heavy weight from the mounting brackets.

[0005] Therefore, it is necessary to provide a new technical solution to solve the above technical problems.

[0006] Summary of the Invention

[0007] The present disclosure provides a new technical solution for a battery assembly.

[0008] In a first aspect of the present disclosure, a battery assembly is provided. The battery assembly comprises: a first flexible material layer, a second flexible material layer, and a battery layer. The battery layer comprises a plurality of spaced-apart battery bodies. The battery layer is positioned between the first and second flexible material layers. The first and second flexible material layers form a flexible zone at the gap between adjacent battery bodies. The second flexible material layer is configured to connect to a component to be mounted, and the flexible zone is adapted to mate with a bend of the component to be mounted.

[0009] In some embodiments, at least one of the first flexible material layer and the second flexible material layer is provided with an adhesive layer on a side close to the battery layer.

[0010] In some embodiments, at least one of the first flexible material layer and the second flexible material layer includes at least one of a fiber material layer, a polymer layer, a glass layer, and a metal film layer.

[0011] In some embodiments, at least one of the first flexible material layer and the second flexible material layer comprises a polymer layer, and the polymer layer comprises a fluoropolymer.

[0012] Some embodiments further include a reinforcement layer located between the first flexible material layer and the battery body.

[0013] In some embodiments, the reinforcement layer includes a layer of fiber material.

[0014] In some embodiments, the battery body is made of photovoltaic material, the first flexible material layer forms a functional area at a position opposite to the photovoltaic material, and the light transmittance of the functional area is ≥80%.

[0015] In some embodiments, the cell body is made of photovoltaic material, the reflectivity of the flexible region of the first flexible material layer is ≥80%, and the flexible region is suitable for reflecting light onto the photovoltaic material.

[0016] In some embodiments, the flexible region of the first flexible material layer includes a base layer and a reflective coating, wherein the reflective coating is disposed on the base layer.

[0017] In some embodiments, the base layer includes at least one of a fiber material layer, a polymer layer, a glass layer, and a metal film layer.

[0018] In some embodiments, the reflective coating comprises at least one of acrylic resin, silicone-modified acrylic resin, alkyd resin, silicone-modified alkyd resin, fluorine-containing resin, epoxy resin, and chlorinated rubber; or

[0019] The reflective coating includes a mixture of at least one of acrylic resin, silicone-modified acrylic resin, alkyd resin, silicone-modified alkyd resin, fluorine-containing resin, epoxy resin, and chlorinated rubber, and at least one of titanium dioxide, talc, calcium carbonate, silicon dioxide, and metal powder.

[0020] In some embodiments, at least one of the first flexible material layer and the second flexible material layer has a thickness of 0.2 mm to 0.5 mm.

[0021] A second aspect of the present disclosure provides a battery device comprising the aforementioned battery assembly.

[0022] Some embodiments further include a substrate, the substrate including a plurality of surfaces, a bending portion formed between the plurality of surfaces, the battery body being located on the plurality of surfaces, and the flexible area being located on the bending portion.

[0023] In some embodiments, a first protrusion is formed between two adjacent surfaces, the first protrusion includes a plurality of bending portions, and the flexible area covers the first protrusion.

[0024] In some embodiments, the flexible area has a curved surface structure.

[0025] In some embodiments, the substrate includes a second protrusion and a recessed portion, the multiple surfaces include a top surface located at the second protrusion, a bottom surface located at the bottom of the recessed portion, and a side surface located between the top surface and the bottom surface, the connection between the top surface and the side surface and the connection between the bottom surface and the side surface form the bending portion, the battery layer includes a plurality of battery bodies, and the plurality of battery bodies are respectively located on the top surface, the bottom surface and the side surface.

[0026] In some embodiments, the substrate includes a second protrusion and a recessed portion, the multiple surfaces include a top surface positioned on the second protrusion and a side surface located on the recessed portion, the connection between the top surface and the side surface and the connection between two adjacent side surfaces form the bending portion, the battery layer includes a plurality of battery bodies, and the plurality of battery bodies are respectively located on the top surface and the side surface.

[0027] In some embodiments, the substrate includes a second protrusion and a recessed portion, the multiple surfaces include a bottom surface positioned at the bottom of the recessed portion and a side surface located at the recessed portion, the connection between the bottom surface and the side surface and the connection between two adjacent side surfaces form the bending portion, and the battery layer includes a plurality of battery bodies, and the plurality of battery bodies are respectively located on the bottom surface and the side surface.

[0028] In some embodiments, edges of the first flexible material layer and the second flexible material layer can be bent to cover edges of the substrate.

[0029] In some embodiments, the substrate includes a color-coated steel plate.

[0030] In one embodiment of the present disclosure, the battery assembly has a simple structure. During installation, the battery assembly can be directly attached to the surface of the component to be mounted, without the need for a separate bracket to support the battery assembly. This reduces the weight of the battery assembly.

[0031] Furthermore, the battery assembly has a flexible zone. The first and second flexible material layers can bend in this zone, allowing the battery assembly to conform to the bend of the component to be mounted. This increases the contact area between the battery assembly and the component to be mounted. This significantly reduces the gap between the battery assembly and the component to be mounted, making it less likely that the battery assembly will become suspended in the air. This results in a more secure connection between the battery assembly and the component to be mounted.

[0032] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0034] FIG1 is a schematic structural diagram of a power generation assembly according to an embodiment of the present disclosure.

[0035] FIG2 is an assembly diagram of a power generation device according to one embodiment of the present disclosure.

[0036] 3 to 6 are schematic structural diagrams of power generation devices according to embodiments of the present disclosure.

[0037] FIG7 is an overall schematic diagram of a power generation device according to an embodiment of the present disclosure.

[0038] Explanation of the accompanying drawings: 1. First flexible material layer; 11. Flexible area; 12. Functional area; 2. First adhesive film layer; 3. Battery layer; 31. Battery body; 4. Second adhesive film layer; 5. Second flexible material layer; 6. Adhesive layer; 7. Substrate; 71. Top surface; 72. Bottom surface; 73. Side surface; 74. First protrusion; 75. Second protrusion; 76. Recessed portion. DETAILED DESCRIPTION

[0039] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure.

[0040] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0041] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0042] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0043] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0044] One embodiment of the present disclosure provides a battery assembly. As shown in Figures 1 and 2, the battery assembly includes a first flexible material layer 1, a second flexible material layer 5, and a battery layer 3. The battery layer 3 includes a plurality of battery cells 31 spaced apart from each other. The battery layer 3 is positioned between the first flexible material layer 1 and the second flexible material layer 5. The first flexible material layer 1 and the second flexible material layer 5 form a flexible region 11 in the gap between adjacent battery cells 31. The second flexible material layer 1 is configured to connect to a component to be mounted. The flexible region 11 conforms to the bend of the component to be mounted.

[0045] In this example, the first flexible material layer 1 and the second flexible material layer 5 are made of flexible material. The first flexible material layer 1 and the second flexible material layer 5 can be bent to adapt to the bend of the part to be installed. The battery body 31 can be a photovoltaic material battery, a rechargeable battery, etc. Multiple battery bodies 31 can be connected together in series, parallel, etc. Multiple battery bodies 31 are sandwiched between the first flexible material layer 1 and the second flexible material layer 5. The battery body 31 is usually made of a hard material and cannot be bent. The multiple battery bodies 31 are arranged in an array. Gaps are formed between adjacent battery bodies 31. At the gaps, the first flexible material layer 1 and the second flexible material layer 5 form a flexible area 11. The flexible area 11 can be bent to adapt to the bend of the part to be installed.

[0046] In the disclosed embodiments, the battery assembly has a simple structure. During installation, the battery assembly can be directly attached to the surface of the component to be mounted, without the need for a separate bracket to support the battery assembly. This reduces the weight of the battery assembly.

[0047] Furthermore, the battery assembly has a flexible region 11. In this region 11, the first and second flexible material layers 1 and 5 can bend, allowing the battery assembly to conform to the bend of the component to be mounted. This increases the contact area between the battery assembly and the component to be mounted. This significantly reduces the gap between the battery assembly and the component to be mounted, making it less likely that the battery assembly will become suspended in the air. This results in a more secure connection between the battery assembly and the component to be mounted.

[0048] In addition, the flexible area 11 can be cut, which enables the battery assembly to be set to a suitable size according to actual needs to facilitate the use of the battery assembly.

[0049] In addition, the flexible area 11 enables the battery assembly to be folded, thereby enabling the battery assembly to be stored, facilitating the packaging and transportation of the battery assembly.

[0050] In one example, as shown in FIG. 1 and FIG. 2 , at least one of the first flexible material layer 1 and the second flexible material layer 5 is provided with an adhesive layer on a side close to the battery layer 3 .

[0051] The adhesive layer is used to bond the first flexible material layer 1 and the second flexible material layer 5 to the battery body 31. In the flexible area 11, the adhesive layer can also bond the first flexible material layer 1 and the second flexible material layer 5 together.

[0052] The adhesive layer, for example, includes a first adhesive film layer 2 positioned between the first flexible material layer 1 and the battery layer 3, and a second adhesive film layer 4 positioned between the second flexible material layer 5 and the battery layer 3. The first adhesive film layer 2 and the second adhesive film layer 4 may be made of, but are not limited to, ethylene vinyl acetate copolymer (EVA) film, polyolefin elastomer (POE) film, polyvinyl butyral (PVB) film, silicone film, co-extruded EVA-POE film, and the like.

[0053] The adhesive layer enables the first flexible material layer 1, the second flexible material layer 5 and the battery layer 3 to form an integrated structure. In this way, the overall structural strength of the battery assembly can be effectively improved.

[0054] Of course, the connection method is not limited to bonding, and those skilled in the art can select it according to actual needs. For example, the first flexible material layer 1, the second flexible material layer 5 and the battery layer 3 can also be connected together using wires or the like.

[0055] In one example, at least one of the first flexible material layer 1 and the second flexible material layer 5 includes at least one of a fiber material layer, a polymer layer, a glass layer, and a metal film layer.

[0056] In this example, the fiber material layer can be made of at least one of glass fiber, carbon fiber, polyester fiber, and polyaramid fiber. The fiber material is prepared into a fiber prepreg, which is then molded or combined with other layers.

[0057] The material of the polymer layer can be, but is not limited to, plastic, rubber, silicone, etc. The polymer layer is easy to process and has good ductility and bendability. For example, the material of the polymer layer is polyethylene terephthalate (PET). This material has excellent physical and mechanical properties over a wide temperature range. The operating temperature of PET can reach 120°C and it has excellent electrical insulation. At high temperatures and high frequencies, PET still has good electrical properties, but its corona resistance is poor, and its creep resistance, fatigue resistance, friction resistance, and dimensional stability are good.

[0058] The glass layer is typically ultra-thin glass. For example, ultra-thin glass has a thickness of less than 0.1 mm. Ultra-thin glass has excellent bending properties.

[0059] The metal film layer is, for example, an aluminum film layer, a stainless steel film layer, a copper film layer, etc.

[0060] The above materials can be bent to fit the bent portion of the component to be installed.

[0061] Of course, the first flexible material layer 1 and the second flexible material layer 5 are not limited to the above embodiments, and those skilled in the art can make configurations according to actual needs.

[0062] In one example, at least one of the first flexible material layer 1 and the second flexible material layer 5 comprises a polymer layer, and the polymer layer comprises a fluoropolymer.

[0063] Fluoropolymers can be made of, but are not limited to, fluoroplastics, such as polytetrafluoroethylene (PTFE), ethylene tetrafluoroethylene (ETFE), and ethylene chlorotrifluoroethylene (ECTFE). Fluoropolymers have excellent temperature resistance and aging resistance.

[0064] In one example, the battery assembly further includes a reinforcement layer located between the first flexible material layer 1 and the battery body 31 .

[0065] For example, the reinforcement layer is bonded to the first flexible material layer 1 and the battery layer 3. The first flexible material layer 1 is typically exposed to the environment and susceptible to impact. The reinforcement layer can effectively increase the structural strength of the exposed side of the battery assembly, thereby effectively improving the durability of the battery assembly.

[0066] In one example, the reinforcement layer includes a fiber material layer. The fiber material layer has high structural strength and can significantly improve the structural strength of the battery assembly.

[0067] In one example, the first flexible material layer 1 and the reinforcing layer are made of the same material. This approach can facilitate the manufacture of the battery assembly.

[0068] In one example, a battery assembly includes multiple reinforcement layers bonded together. This can more effectively improve the structural strength and durability of the battery assembly.

[0069] In one example, the battery body 31 is made of photovoltaic material. The first flexible material layer 1 forms a functional area 12 at a position opposite to the photovoltaic material, and the light transmittance of the functional area 12 is ≥80%.

[0070] In this example, photovoltaic materials are materials that generate electricity using light. These materials can include, but are not limited to, polycrystalline silicon, single-crystalline silicon, cadmium sulfide, gallium arsenide, copper indium selenide, and other materials. Functional region 12 is the area capable of performing the functions of battery body 31, for example, photovoltaic power generation. In this example, the light transmittance of functional region 12 of the first flexible material layer 1 is ≥80%. This significantly improves the power generation efficiency of the battery assembly.

[0071] In one example, at least one of the first flexible material layer 1 and the second flexible material layer 5 has a thickness of 0.2 mm to 0.5 mm.

[0072] For example, the first flexible material layer 1 includes glass fiber prepreg. The glass fiber prepreg has a thickness of 0.2 mm to 0.5 mm. Within this range, the first flexible material layer 1 is resistant to hail impacts while achieving a light transmittance exceeding 88%, resulting in high power generation efficiency for the battery assembly.

[0073] In one example, the cell body 31 is a photovoltaic material, the reflectivity of the flexible region 11 of the first flexible material layer 1 is ≥80%, and the flexible region 11 is suitable for reflecting light onto the photovoltaic material.

[0074] Photovoltaic materials are as described above. Under normal circumstances, light that strikes the flexible region 11 cannot be used to generate electricity. In this example, by setting the reflectivity of the flexible region 11 of the first flexible material layer 1 to be above 80%, the light energy striking the flexible region 11 can be reused to increase the illumination intensity of the functional region 12, thereby improving the power generation efficiency of the solar cell assembly.

[0075] Those skilled in the art can set the angle of the flexible area 11 so as to reflect the light irradiated to the flexible area 11 onto the photovoltaic material.

[0076] In one example, the flexible region 11 of the first flexible material layer 1 includes a base layer and a reflective coating layer, wherein the reflective coating layer is disposed on the base layer.

[0077] The base layer can be, for example, at least one of the aforementioned fiber material layer, polymer layer, glass layer, and metal film layer. The reflective coating can effectively reflect sunlight. The molecular structure of the reflective coating should contain as few energy-absorbing groups as possible, such as -COC-, C=O, and -OH. For example, the reflective coating can be made of, but not limited to, at least one of acrylic resin, silicone-modified acrylic resin, alkyd resin, silicone-modified alkyd resin, fluororesin, epoxy resin, and chlorinated rubber. Alternatively, the reflective coating can include a mixture of at least one of acrylic resin, silicone-modified acrylic resin, alkyd resin, silicone-modified alkyd resin, fluororesin, epoxy resin, and chlorinated rubber, and at least one of titanium dioxide, talc, calcium carbonate, silicon dioxide, or metal powder. Metal powders include, for example, silver powder, copper powder, and aluminum powder. The reflective coating is applied to the base layer to form the first flexible material layer 1.

[0078] The material has good reflective properties, for example, a reflectivity of more than 80%, thereby improving the power generation efficiency of the battery assembly.

[0079] Of course, the first flexible material layer 1 is not limited to the above embodiments, and those skilled in the art can make a selection according to actual needs.

[0080] In one example, at least one of the first flexible material layer 1 and the second flexible material layer 5 has a thickness of 0.2 mm to 0.5 mm.

[0081] Within this range, the first flexible material layer 1 and the second flexible material layer 5 have good flexibility, light transmittance and structural strength.

[0082] Another embodiment of the present disclosure provides a battery device, which includes the battery assembly described above.

[0083] The battery device has the characteristics of light weight, simple structure and high structural strength.

[0084] In one example, as shown in FIG2 , the battery device further includes a substrate 7 . The substrate 7 includes multiple surfaces. Bends are formed between the multiple surfaces. The battery body 31 is located on the multiple surfaces. The flexible region 11 is located on the bends.

[0085] Substrate 7 is used to mount battery components. Substrate 7 can be, but is not limited to, a color-coated steel plate. Those skilled in the art can customize the size and structure of the color-coated steel plate based on actual needs. The color-coated steel plate is bent to form multiple surfaces. Adjacent surfaces have at least one bend between them. A bend is a corner. Multiple surfaces can be located at the same height or at different heights. Multiple surfaces can be parallel or intersecting to form a set angle. Surfaces can be flat or curved. The second flexible material layer 5 is bonded to the color-coated steel plate by bonding. An adhesive layer 6 is formed between the second flexible material layer 5 and the color-coated steel plate.

[0086] For example, the adhesive layer 6 located between multiple surfaces and the second flexible material layer 5 ensures that the battery body 31 is securely bonded to the corresponding surfaces and positioned substantially parallel to them. Bends are often susceptible to impact and experience stress concentration. The adhesive layer 6 located between the bend and the second flexible material layer 5 ensures that the first flexible material layer 1, the second flexible material layer 5, and the bend form a cohesive structure, improving the durability of the battery assembly.

[0087] In this example, the overall structure of the battery device is simple, and the battery assembly and the substrate 7 can be connected into an integrated structure without providing a bracket or the like.

[0088] Furthermore, the battery device as a whole is lightweight and has excellent durability.

[0089] In one example, as shown in FIG6 , a first protrusion 74 is formed between two adjacent surfaces. The first protrusion 74 includes a plurality of bends. The flexible region 11 covers the first protrusion 74. The flexible region 11 is spaced apart from the first protrusion 74.

[0090] In this example, multiple surfaces are located at the same height. A first raised portion 74 is formed between adjacent surfaces. The cross-section of the first raised portion 74 may be arcuate, triangular, trapezoidal, rectangular, or the like. The entire flexible zone 11 is located outside the first raised portion 74. In the flexible zone 11, the second flexible material layer 5 is not bonded to the first raised portion 74, resulting in a gap between the flexible zone 11 and the first raised portion 74. In other words, the entire flexible zone 11 spans the first raised portion 74. In the functional zone 12 of the first flexible material layer 1, the second flexible material layer 5 is bonded to the surface. This approach also ensures a secure connection between the battery assembly and the substrate.

[0091] In addition, the flexible area 11 can be configured into a predetermined structure according to actual needs, so that the light irradiating the flexible area 11 can be reflected onto the photovoltaic material.

[0092] Of course, in other examples, multiple surfaces may also be located at different heights.

[0093] In one example, as shown in FIG6 , the flexible area 11 is a curved surface structure. The entire curved surface structure is located outside the first protrusion 74. Compared with a structure with corners, the curved surface structure has higher structural strength and is less likely to cause stress concentration.

[0094] In addition, compared with the inclined surface, the curved surface structure can meet the reflection requirements of light irradiated at different angles, so as to reflect more light onto the photovoltaic material.

[0095] In one example, as shown in Figure 6 , the functional region 12 of the first flexible material layer 1 is a composite layer of ETFE, PET, and fiberglass. The ETFE layer is the surface layer and has a thickness of 20 μm. The fiberglass layer is 400 μm thick. The PET layer is 310 μm thick. The PET layer is positioned between the fiberglass and ETFE layers. The three layers are bonded together using acrylic glue. This thickness ensures a light transmittance of 88% or greater for the first flexible material layer 1. The width of the functional region 12 of the first flexible material layer 1 (as shown in B in Figure 6 ) is 185 mm.

[0096] The flexible region 11 of the first flexible material layer 1 is a composite layer of ETFE and PET layers. The cross-section of the flexible region 11 is a curved surface. The ETFE layer is 20 μm thick, and the PET layer is 310 μm thick. Both layers are bonded using acrylic adhesive. The first adhesive film layer 2 is a transparent EVA film. The second adhesive film layer 4 is a white EVA film. The flexible region 11 of the first flexible material layer 1 is provided with a reflective coating. The reflective coating is made of acrylic resin and has a reflectivity of at least 80%. The width of the flexible region 11 of the first flexible material layer 1 is 190 mm. The adhesive layer 6 is made of silicone rubber.

[0097] For example, the solar altitude angle on the winter solstice in a certain place is 90°-(31°11″+23°26″)=35°23″. By solving, it is found that the angle between the first protrusion 74 and the bottom surface 72 is 30° or 90°, so the angle is taken as 30°.

[0098] It can be seen that in this example, the flexible area 11 of the arc-shaped structure can effectively reflect light onto the battery body 31 on the bottom surface 72 .

[0099] In one example, as shown in FIG3 , the substrate 7 includes a second raised portion 75 and a recessed portion 76. The multiple surfaces include a top surface 71 located at the second raised portion 75, a bottom surface 72 located at the bottom of the recessed portion 76, and a side surface 73 located between the top surface 71 and the bottom surface 72. The junctions between the top surface 71 and the side surface 73, and between the bottom surface 72 and the side surface 73, form the bend. The battery layer 3 includes multiple battery bodies 31. The multiple battery bodies 31 are located on the top surface 71, the bottom surface 72, and the side surface 73, respectively.

[0100] In this example, the top surface 71 and the bottom surface 72 are parallel. The side surface 73 is inclined relative to the top surface 71 and the bottom surface 72. The angle between the side surface 73 and the top surface 71 is obtuse. The angle between the side surface 73 and the bottom surface 72 is obtuse. The cross-sections of the second protrusion 75 and the recessed portion 76 are both trapezoidal. The battery body 31 is provided on the top surface 71, the bottom surface 72, and the side surface 73. The flexible area 11 corresponds to the bent portion. The functional area 12 and the flexible area 11 are both bonded to the substrate 7.

[0101] In this way, the connection strength between the battery assembly and the substrate is high. The space utilization rate of the battery device is high. The multiple battery bodies 31 are oriented in different directions, which significantly improves the ability of the battery assembly to receive light.

[0102] In one example, as shown in Figure 4, the substrate 7 includes a second raised portion 75 and a recessed portion 76. The multiple surfaces include a top surface 71 located on the second raised portion 75 and a side surface 73 located on the recessed portion 76. The junction between the top surface 71 and the side surface 73, as well as the junction between two adjacent side surfaces 73, form the bent portion. The battery layer 3 includes multiple battery bodies 31. The multiple battery bodies 31 are located on the top surface 71 and the side surface 73, respectively.

[0103] In this example, the cross-section of the second protrusion 75 is trapezoidal, and the cross-section of the recess 76 is V-shaped. The angle between the side surface 73 and the top surface 71 is obtuse. The cross-sectional lengths of adjacent side surfaces 73 are equal. In this embodiment, the angle between adjacent side surfaces 73 is a right angle or an obtuse angle to reduce mutual light blocking by the two side surfaces 73.

[0104] Similarly, in this example, the connection strength between the battery assembly and the base is high. The space utilization rate of the battery device is high. The multiple battery bodies 31 are oriented in different directions, which significantly improves the ability of the battery assembly to receive light.

[0105] In one example, as shown in Figure 5, the substrate 7 includes a second raised portion 75 and a recessed portion 76. The multiple surfaces include a bottom surface 72 located at the bottom of the recessed portion 76 and a side surface 73 located within the recessed portion 76. The junction between the bottom surface 72 and the side surface 73, as well as the junction between two adjacent side surfaces 73, forms the bent portion. The battery layer 3 includes multiple battery bodies 31. The multiple battery bodies 31 are located on the bottom surface 72 and the side surface 73, respectively.

[0106] In one example, the cross-section of the second raised portion 75 is an inverted V-shape, and the cross-section of the recessed portion 76 is a trapezoid. The angle between the side surface 73 and the bottom surface 72 is obtuse. The cross-sectional lengths of adjacent side surfaces 73 are equal. In this embodiment, the angle between adjacent side surfaces 73 is a right angle or an obtuse angle to more effectively receive light.

[0107] In this example, the functional region 12 of the first flexible material layer 1 is a composite layer of ETFE and fiberglass. The ETFE layer is the surface layer and has a thickness of 20 μm. The fiberglass layer has a thickness of 400 μm. This thickness ensures that the light transmittance of the first flexible material layer 1 is greater than 88%. The width of the functional region 12 of the first flexible material layer 1 is 187 mm.

[0108] Flexible region 11 of first flexible material layer 1 is an ETFE layer with a thickness of 20 μm. A reflective coating is provided on flexible region 11 of first flexible material layer 1. The reflective coating is made of acrylic resin and has a reflectivity of over 90%. Flexible region 11 of first flexible material layer 1 is 8 mm wide.

[0109] The first and second adhesive film layers 2 and 4 are EVA films. The second flexible material layer 5 comprises a PET layer. The thickness of the second flexible material layer 5 is 310 μm. The substrate is a color-coated steel plate. For example, the second raised portion 75 of the color-coated steel plate has a height of 135 mm and a width of the bottom surface 72 of 195 mm. The battery device also includes a junction box. The junction box is connected to the battery body 31 and is located on the second raised portion 75. The adhesive layer 6 is made of silicone rubber.

[0110] In this embodiment, the second flexible material layer 5 further includes a waterproof layer. For example, the waterproof layer is an aluminum film layer. The aluminum film layer is located outside the PET layer.

[0111] In this example, the connection strength between the battery assembly and the substrate 7 is high. The space utilization rate of the battery device is high. The multiple battery bodies 31 are oriented in different directions, which significantly improves the ability of the battery assembly to receive light.

[0112] In another example, the functional region 12 of the first flexible material layer 1 is a composite layer of ETFE, fiberglass, and PET. The ETFE layer is the surface layer and has a thickness of 20 μm. The fiberglass layer has a thickness of 400 μm. The PET layer has a thickness of 310 μm. The first adhesive film layer 2 is a transparent EVA film. The second adhesive film layer 4 is a white EVA film. The second flexible material layer 5 is a PET layer and has a thickness of 310 μm.

[0113] In one example, the edges of the first flexible material layer 1 and the second flexible material layer 5 can be bent to wrap around the edges of the substrate 7 .

[0114] As shown in Figure 7, the edges of the first flexible material layer 1 and the second flexible material layer 5 can be bent, with the bent portion wrapping around the edge of the substrate 7 and extending to the surface of the substrate 7 facing away from the battery layer 3. This effectively increases the connection area between the battery assembly and the substrate 7, thereby improving the bonding strength between the battery assembly and the substrate 7. Furthermore, the battery assembly protects the edges of the substrate 7, improving the durability of the battery device.

[0115] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0116] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art will understand that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. Those skilled in the art will understand that the above embodiments may be modified without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A battery assembly, wherein, Comprising: A first flexible material layer (1), a second flexible material layer (5), and a battery layer (3), wherein the battery layer (3) includes a plurality of battery bodies (31) arranged at intervals, the battery layer (3) is located between the first flexible material layer (1) and the second flexible material layer (5), the first flexible material layer (1) and the second flexible material layer (5) form a flexible region (11) at the gap between adjacent battery bodies (31), the second flexible material layer (5) is used to connect with the component to be installed, and the flexible region (11) is adapted to the bent portion of the component to be installed.

2. The battery assembly according to claim 1, wherein, At least one of the first flexible material layer (1) and the second flexible material layer (5) is provided with an adhesive layer on the side close to the battery layer (3).

3. The battery assembly according to claim 1 or 2, wherein, At least one of the first flexible material layer (1) and the second flexible material layer (5) includes at least one of a fiber material layer, a polymer layer, a glass layer, and a metal film layer.

4. The battery assembly according to any one of claims 1-3, wherein, At least one of the first flexible material layer (1) and the second flexible material layer (5) includes a polymer layer, and the polymer layer includes a fluoropolymer.

5. The battery assembly according to any one of claims 1-4, wherein, It further includes a reinforcing layer, and the reinforcing layer is located between the first flexible material layer (1) and the battery body (31).

6. The battery assembly according to claim 5, wherein, The reinforcing layer includes a fiber material layer.

7. The battery assembly according to any one of claims 1-6, wherein, The battery body (31) is a photovoltaic material, and the first flexible material layer (1) forms a functional region (12) at the position opposite to the photovoltaic material, and the light transmittance of the functional region (12) is ≥80%.

8. The battery assembly according to any one of claims 1-6, wherein, The battery body (31) is a photovoltaic material, the reflectivity of the flexible region (11) of the first flexible material layer (1) is ≥80%, and the flexible region (11) is adapted to reflect light onto the photovoltaic material.

9. The battery assembly according to claim 8, wherein, The flexible region (11) of the first flexible material layer (1) includes a substrate layer and a reflective coating, and the reflective coating is provided on the substrate layer.

10. The battery assembly according to claim 9, wherein, The substrate layer includes at least one of a fiber material layer, a polymer layer, a glass layer, and a metal film layer.

11. The battery assembly according to claim 9 or 10, wherein, The reflective coating includes at least one of acrylic resin, silicone-modified acrylic resin, alkyd resin, silicone-modified alkyd resin, fluororesin, epoxy resin, and chlorinated rubber; or The reflective coating includes at least one of acrylic resin, silicone-modified acrylic resin, alkyd resin, silicone-modified alkyd resin, fluororesin, epoxy resin, and chlorinated rubber, and a mixture of at least one of titanium dioxide, talcum powder, calcium carbonate, silicon dioxide, and metal powder.

12. The battery assembly according to any one of claims 1-11, wherein, The thickness of at least one of the first flexible material layer (1) and the second flexible material layer (5) is 0.2 mm to 0.5 mm.

13. A battery device, wherein, It includes the battery module according to any one of claims 1-12.

14. The battery device according to claim 13, wherein, It further includes a substrate (7), the substrate (7) includes a plurality of surfaces, bent portions are formed between the plurality of surfaces, the battery body (31) is located on the plurality of surfaces, and the flexible region (11) is located at the bent portions.

15. The battery device according to claim 14, wherein, A first protrusion (74) is formed between two adjacent surfaces, the first protrusion (74) includes a plurality of the bent portions, and the flexible region (11) covers the first protrusion (74).

16. The battery device according to claim 14 or 15, wherein, The flexible region (11) has a curved surface structure.

17. The battery device according to claim 14, wherein, The substrate (7) includes a second convex portion (75) and a concave portion (76). The multiple surfaces include a top surface (71) located on the second convex portion (75), a bottom surface (72) located at the bottom of the concave portion (76), and a side surface (73) located between the top surface (71) and the bottom surface (72). The connection between the top surface (71) and the side surface (73) and the connection between the bottom surface (72) and the side surface (73) form the bending portion. The battery layer (3) includes a plurality of battery bodies (31), and the plurality of battery bodies (31) are respectively located on the top surface (71), the bottom surface (72), and the side surface (73).

18. The battery device according to claim 14, wherein, The substrate (7) includes a second convex portion (75) and a concave portion (76). The multiple surfaces include a top surface (71) located on the second convex portion (75) and a side surface (73) located on the concave portion (76). The connection between the top surface (71) and the side surface (73) and the connection between two adjacent side surfaces (73) form the bending portion. The battery layer (3) includes a plurality of battery bodies (31), and the plurality of battery bodies (31) are respectively located on the top surface (71) and the side surface (73).

19. The battery device according to claim 14, wherein, The substrate (7) includes a second convex portion (75) and a concave portion (76). The multiple surfaces include a bottom surface (72) located at the bottom of the concave portion (76) and a side surface (73) located on the concave portion (76). The connection between the bottom surface (72) and the side surface (73) and the connection between two adjacent side surfaces (73) form the bending portion. The battery layer (3) includes a plurality of battery bodies (31), and the plurality of battery bodies (31) are respectively located on the bottom surface (72) and the side surface (73).

20. The battery device according to any one of claims 14-19, wherein, The edges of the first flexible material layer (1) and the second flexible material layer (5) can be bent to cover the edges of the substrate (7).

21. The battery device according to any one of claims 14-20, wherein, The substrate (7) includes color steel plate.

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