Battery device and electric device
By optimizing the protective plate structure of the battery device and adopting a design of multi-layer fiber prepreg unidirectional tape and bonding layer, the problems of stress concentration and structural failure of the battery device under external impact were solved, achieving higher reliability and energy density.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2025-03-26
- Publication Date
- 2026-05-05
AI Technical Summary
Existing battery devices have low reliability, and are prone to stress concentration and structural failure, especially under external impact.
The reinforcing layer is composed of multi-layer fiber prepreg unidirectional tapes, with each layer of fibers arranged in a unidirectional direction and connected by an adhesive layer. The resulting protective panel structure includes a first fiber resin layer, a reinforcing layer, and a second fiber resin layer. The layering method is optimized to ensure uniform stress distribution and improve tensile strength.
It improves the structural stability and shock resistance of the battery device, reduces the risk of stress concentration, and enhances the reliability of the battery device, while taking into account both lighter weight and higher energy density.
Smart Images
Figure CN224204235U_ABST
Abstract
Description
[0001] Cross-reference to related applications
[0002] This application claims priority to PCT patent application PCT / CN2025 / 071323 entitled "Battery Device and Electrical Device" filed on January 8, 2025; PCT / CN2024 / 129179 entitled "Battery Device and Electrical Device" filed on October 31, 2024; and PCT / CN2024 / 128582 entitled "Battery Device and Electrical Device" filed on October 30, 2024, the entire contents of which are incorporated herein by reference. Technical Field
[0003] This application relates to the field of battery technology, specifically to a battery device and an electrical device. Background Technology
[0004] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.
[0005] Improving the reliability of battery devices is a pressing issue in battery technology. Utility Model Content
[0006] In view of the above problems, this application provides a battery device and an electrical device that can improve the reliability of the battery device.
[0007] In a first aspect, this application provides a battery device, which includes a housing, a battery cell, and a protective plate, with the battery cell disposed within the housing. Along the direction of gravity, the protective plate is disposed at the bottom of the battery cell. The protective plate includes a first fiber resin layer, a reinforcing layer, a second fiber resin layer, and a supplementary layer. The protective plate includes a first region and a second region. In the first region, the first fiber resin layer, the reinforcing layer, and the second fiber resin layer are sequentially stacked, with the first fiber resin layer located on the side of the reinforcing layer facing the battery cell. In the second region, the first fiber resin layer, the second fiber resin layer, and the supplementary layer are sequentially stacked; or, the supplementary layer, the first fiber resin layer, and the second fiber resin layer are sequentially stacked; or, the first fiber resin layer, the supplementary layer, and the second fiber resin layer are sequentially stacked; wherein the supplementary layer includes multiple layers of mutually stacked unidirectional fiber prepreg tapes, with the fibers in each layer of unidirectional fiber prepreg tapes arranged in a unidirectional direction, and the fiber arrangement direction in each layer of unidirectional fiber prepreg tapes being the same.
[0008] In the above scheme, because the fibers in each layer of the multi-layered, stacked unidirectional fiber prepreg tape of the reinforcing layer are arranged in a unidirectional direction, and the fiber arrangement direction is the same in each layer, this has several advantages. First, it ensures more uniform stress distribution across the reinforcing layer under load, with the force transmission path being essentially consistent, reducing the risk of stress concentration. Second, the continuous, unidirectional arrangement of fibers helps to resist external impacts, increasing the tensile strength of the reinforcing layer and reducing the risk of deformation. Third, it allows the reinforcing layer to achieve both high strength and relatively light weight.
[0009] In one or more embodiments of the first aspect, the reinforcing layer is a fiber resin frame surrounding the reinforcing layer. The fiber resin frame includes multiple frame segments connected end to end. Each frame segment includes multiple layers of unidirectional sub-fiber prepreg tapes stacked on top of each other. The fibers in each layer of unidirectional sub-fiber prepreg tapes are arranged in a unidirectional direction, and the fiber arrangement direction in each layer of unidirectional sub-fiber prepreg tapes is the same.
[0010] In the above scheme, the fibers in the unidirectional tape of the sub-fiber prepreg in each frame segment are arranged in the same direction, which enables each frame segment of the reinforcing layer to have high bending strength, further improving the reliability of the reinforcing layer.
[0011] In one or more embodiments of the first aspect, the fibers in the unidirectional belts of the fiber prepreg in two adjacent frame segments are broken.
[0012] In the above scheme, since the fibers in the unidirectional belt of the fiber prepreg in two adjacent frame segments are broken, on the one hand, the risk of the fibers breaking due to excessive bending during the forming process of the reinforcing layer can be reduced, and on the other hand, the risk of defects such as cracks or voids in the reinforcing layer caused by excessive displacement of two fibers at an angle during the forming process of the reinforcing layer can also be reduced.
[0013] In one or more embodiments of the first aspect, the fiber arrangement direction in the sub-fiber prepreg unidirectional tape of each frame segment is parallel to the length direction of its respective frame segment.
[0014] In the above scheme, the fiber arrangement direction is parallel to the length direction of its respective frame segment, which can maximize the bending strength of each frame segment and further improve the reliability of the reinforcement layer.
[0015] In one or more embodiments of the first aspect, the fiber mass content in the reinforcing layer is W, satisfying: 50% ≤ W ≤ 75%.
[0016] In the above scheme, when W≥50%, the reinforcing layer has high flexural strength, which is beneficial to improving the reinforcing layer's ability to resist impact and thus improving the reliability of the reinforcing layer; when W≤75%, the resin has strong fluidity, the flatness of the reinforcing layer is high, and the energy absorption capacity of the reinforcing layer is stronger when the resin content is higher, and the risk of fiber brittle fracture is lower; therefore, when 50%≤W≤75%, while ensuring that the reinforcing layer has high flexural strength, the risk of fiber brittle fracture can also be reduced.
[0017] In one or more embodiments of the first aspect, 60% ≤ W ≤ 75%.
[0018] In the above scheme, when W≥60%, the bending strength of the reinforcement layer can be further improved, thereby further improving the reliability of the reinforcement layer; when W≤75%, the risk of fiber brittle fracture can be further reduced; therefore, when 60%≤W≤75%, while further improving the bending strength of the reinforcement layer, the risk of fiber brittle fracture can also be further reduced.
[0019] In one or more embodiments of the first aspect, the protective plate further includes an adhesive layer, the reinforcing layer is connected to the first fiber resin layer by the adhesive layer, and / or, the reinforcing layer is connected to the second fiber resin layer by the adhesive layer.
[0020] In the above scheme, the bonding layer can make the connection between the various parts of the protective plate tighter and the structure more stable.
[0021] In one or more embodiments of the first aspect, the thickness of the adhesive layer is H1, satisfying: 0 < H1 ≤ 0.5 mm.
[0022] In the above scheme, when H1 > 0 mm, the bonding strength of each part of the protective plate is higher and the structural stability is stronger, so that the battery device has higher reliability; when H1 ≤ 0.5 mm, the space occupied by the bonding layer is smaller and the energy density of the battery device is higher; therefore, when 0 mm < H1 ≤ 0.5 mm, the battery device can balance high reliability and energy density.
[0023] In one or more embodiments of the first aspect, the thickness of the first fiber resin layer is less than or equal to the thickness of the second fiber resin layer.
[0024] In the above scheme, since the thickness of the first fiber resin layer is less than or equal to the thickness of the second fiber resin layer, the second fiber resin layer has higher structural strength, which can reduce the risk of excessive deformation of the protective plate and corrosion of the reinforcement layer caused by external force acting on the protective plate through the second fiber resin layer.
[0025] In one or more embodiments of the first aspect, the thickness of the first fiber resin layer is H2, satisfying 0 mm < H2 ≤ 1.2 mm; and / or, the thickness of the second fiber resin layer is H3, satisfying 0 mm < H3 ≤ 1.2 mm.
[0026] In the above scheme, when H2 > 0 mm, the first fiber resin layer has a strong ability to uniformly distribute load, which can weaken the impact force transmitted to the battery cell; when H2 ≤ 1.2 mm, the space occupied by the first fiber resin layer is small, and the battery has a high energy density; therefore, when 0 mm ≤ H3 ≤ 1.2 mm, while the first fiber resin layer has a strong ability to uniformly distribute load, the battery can also have a high energy density.
[0027] When H3 > 0 mm, the second fiber resin layer has a large thickness and a strong ability to resist the impact of gravel; when H3 ≤ 1.2 mm, the space occupied by the second fiber resin layer is small, and the battery device has a high energy density; therefore, when 0 mm ≤ H3 ≤ 1.2 mm, the second fiber resin layer has a strong ability to resist the impact of gravel, while the battery device can also have a high energy density.
[0028] In one or more embodiments of the first aspect, the thickness of the reinforcing layer is H4, satisfying: 0mm < H4 ≤ 1.5mm.
[0029] In the above scheme, when H4 > 0 mm, the reinforcing layer has a large thickness and the protective plate has high structural strength; when H4 ≤ 1.5 mm, the reinforcing layer occupies less space and the battery device has high energy density; therefore, when 0 mm ≤ H4 ≤ 1.5 mm, the battery device can balance high structural strength and energy density.
[0030] In one or more embodiments of the first aspect, in the second region, a first fiber resin layer, a reinforcing layer, and a second fiber resin layer are sequentially stacked, and the thickness of the reinforcing layer is greater than or equal to the thickness of the reinforcing layer.
[0031] In the above scheme, since the thickness of the reinforcing layer is greater than or equal to the thickness of the strengthening layer, the risk of the strengthening layer being exposed is further reduced, thereby further improving the corrosion resistance of the strengthening layer.
[0032] In one or more embodiments of the first aspect, the first fiber resin layer comprises n layers of first fiber-reinforced prepreg stacked on top of each other, and the second fiber resin layer comprises m layers of second fiber-reinforced prepreg stacked on top of each other; wherein, one of n and m is an odd number, and the other of n and m is an even number.
[0033] In the above scheme, odd-numbered layers can enhance shear resistance and disperse local stress, while even-numbered layers have a lower risk of warping deformation. When one of n and m is odd and the other of n and m is even, the protective plate can achieve both good shear resistance and good structural stability.
[0034] In one or more embodiments of the first aspect, n is an odd number and m is an even number.
[0035] In the above scheme, since the second fiber resin layer is closer to the outside of the battery device, the flatness of the outer fiber resin layer can be improved, reducing the risk of the second fiber resin layer being scratched by foreign objects.
[0036] In one or more embodiments of the first aspect, the second region is disposed around the first region.
[0037] In the above scheme, because the second region surrounds the first region, the overall strength distribution of the protective plate is relatively uniform, and the structural stability is strong. Furthermore, in embodiments where the protective plate is connected to the housing via the second region, the risk of corrosion of the reinforcing layer due to sealing failure around the reinforcing layer in the first region during the connection process can be reduced.
[0038] Secondly, this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.
[0039] In the above solutions, since the battery device in one or more of the above embodiments has high reliability, the power supply device including the battery device in one or more of the above embodiments also has high reliability.
[0040] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description
[0041] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:
[0042] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;
[0043] Figure 2 Exploded views of battery devices according to some embodiments of this application;
[0044] Figure 3 Exploded views of protective plates according to some embodiments of this application;
[0045] Figure 4 This is a schematic diagram of a portion of the protective plate structure according to some embodiments of this application, showing the fibers in the frame segment;
[0046] Figure 5 This is a cross-sectional view of a portion of the structure of a battery device according to some embodiments of this application;
[0047] Figure 6 This is a cross-sectional view of a portion of the structure of a battery device according to some embodiments of this application;
[0048] Figure 7 This is a cross-sectional view of a portion of the structure of a battery device according to some embodiments of this application.
[0049] The reference numerals in the detailed embodiments are as follows:
[0050] 1000 - Vehicle; 200 - Controller; 300 - Motor; 100 - Battery Unit; 11 - Housing; 111 - First Housing; 112 - Second Housing; 12 - Battery Cell; 13 - Protective Plate; 131 - First Fiber Resin Layer; 132 - Second Fiber Resin Layer; 133 - First Region; 134 - Reinforcing Layer; 135 - Supplementary Layer; 136 - Second Region; 137 - Frame Segment; 138 - Adhesive Layer; 139 - Fiber; 140 - Adhesive Layer. Detailed Implementation
[0051] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.
[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0053] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.
[0054] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0055] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).
[0056] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.
[0057] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.
[0058] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, reduces the risk of short circuits while allowing active ions to pass through.
[0059] In some embodiments, the separator is a separator membrane. The separator membrane can be any known porous structure separator membrane with good chemical and mechanical stability.
[0060] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.
[0061] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The electrolyte can be liquid, gel-like, or solid. Liquid electrolytes include electrolyte salts and solvents.
[0062] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.
[0063] In some implementations, the electrode assembly is a stacked structure.
[0064] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.
[0065] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells.
[0066] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity.
[0067] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.
[0068] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.
[0069] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.
[0070] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing by fixing the battery module in the housing.
[0071] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.
[0072] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.
[0073] In some embodiments, the battery can be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.
[0074] The following discussion will primarily focus on rectangular battery cells. It should be understood that the embodiments described below are also applicable in some respects to cylindrical battery cells, pouch cell cells, or blade cell cells.
[0075] In a typical battery cell structure, a battery cell includes a casing, electrode assemblies, and electrolyte. The casing includes end caps and a housing; the end caps close the opening of the housing to define a space for accommodating the electrode assemblies. In some embodiments, the casing can be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc.
[0076] The development of battery technology must take into account multiple design factors, such as energy density, cycle life, discharge capacity, charge / discharge rate and other performance parameters. In addition, the reliability of the battery device also needs to be considered.
[0077] The outer side of the battery pack casing is fitted with a protective plate to mitigate impact forces and protect the individual battery cells from damage. This protective plate typically includes a reinforcing layer to enhance its structural strength, and is then encapsulated with a fiber resin layer to form a complete plate. To further improve the structural strength and corrosion resistance of the protective plate, a reinforcing layer made of fiber resin is usually added. However, the fibers in this reinforcing layer are often randomly arranged, leading to a higher risk of stress concentration. This increases the risk of the reinforcing layer failing, resulting in a loss of its protective effect and consequently reducing the reliability of the battery pack.
[0078] In view of this, this application provides a battery device, which includes a housing, a battery cell, and a protective plate, with the battery cell disposed within the housing. Along the direction of gravity, the protective plate is disposed at the bottom of the battery cell. The protective plate includes a first fiber resin layer, a reinforcing layer, a second fiber resin layer, and a supplementary layer. The protective plate includes a first region and a second region. In the first region, the first fiber resin layer, the reinforcing layer, and the second fiber resin layer are sequentially stacked, with the first fiber resin layer located on the side of the reinforcing layer facing the battery cell. In the second region, the first fiber resin layer, the second fiber resin layer, and the supplementary layer are sequentially stacked; or, the supplementary layer, the first fiber resin layer, and the second fiber resin layer are sequentially stacked; or, the first fiber resin layer, the supplementary layer, and the second fiber resin layer are sequentially stacked; wherein the supplementary layer includes multiple layers of mutually stacked unidirectional fiber prepreg tapes, with the fibers in each layer of unidirectional fiber prepreg tapes arranged in a unidirectional direction, and the fiber arrangement direction in each layer of unidirectional fiber prepreg tapes being the same. Because the reinforcing layer consists of multiple layers of interlayered unidirectional fiber prepreg tapes, the fibers in each layer are arranged in a unidirectional direction, and the fiber orientation is the same across all layers. This results in several advantages: First, it ensures more uniform stress distribution across the reinforcing layer under load, with a consistent force transmission path, reducing the risk of stress concentration. Second, the continuous, unidirectional fiber arrangement helps resist external impacts, increasing the tensile strength of the reinforcing layer and reducing the risk of deformation. Third, it allows the reinforcing layer to achieve both high strength and relatively light weight.
[0079] The technical solutions described in the embodiments of this application are applicable to battery cells, battery devices, and electrical devices using battery devices.
[0080] Electrical devices include, but are not limited to: electric vehicles, electric cars, ships, and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.
[0081] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.
[0082] For example, Figure 1 This is a schematic diagram of the structure of a vehicle 1000 according to some embodiments of this application. The vehicle 1000 can be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle 1000 may have a motor 300, a controller 200, and a battery device 100 installed inside. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be installed at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system, such as for the power requirements of starting, navigation, and operation of the vehicle 1000. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle 1000.
[0083] To meet different power demands, the battery device 100 may include multiple battery cells 12, which can be connected in series, parallel, or a combination thereof. The battery device 100 may also be referred to as a battery pack. Optionally, the multiple battery cells 12 can first be connected in series, parallel, or a combination thereof to form a battery cell assembly, and then the battery cell assemblies can be connected in series, parallel, or a combination thereof to form the battery device 100. In other words, the multiple battery cells 12 can directly form the battery device 100, or they can first be assembled into battery cell assemblies, and then the battery cell assemblies can be assembled into the battery device 100.
[0084] For example, please refer to Figure 2 , Figure 2The exploded view of a battery device 100 according to some embodiments of this application shows that the battery device 100 may include a plurality of battery cells 12. The battery device 100 may also include a housing 11, which has a hollow interior structure, housing the plurality of battery cells 12. As shown in the figure, these are referred to here as a first housing 111 and a second housing 112, which are fastened together. The shapes of the first housing 111 and the second housing 112 can be determined according to the combined shape of the plurality of battery cells 12. Both the first housing 111 and the second housing 112 may have an open surface. For example, both the first housing 111 and the second housing 112 may be hollow cuboids with only one open surface each. The open surfaces of the first housing 111 and the second housing 112 are opposite to each other, and the first housing 111 and the second housing 112 are fastened together to form a housing 11 with a closed cavity. Multiple battery cells 12 are connected in parallel, series, or mixed and placed inside the housing 11 formed by the first housing 111 and the second housing 112 being fastened together.
[0085] Optionally, the battery device 100 may also include other structures, which will not be described in detail here. For example, the battery device 100 may also include a busbar component for realizing electrical connection between multiple battery cells 12, such as in parallel, series, or mixed connection. Specifically, the busbar component can realize electrical connection between battery cells 12 by connecting the electrode terminals of the battery cells 12. Further, the busbar component can be fixed to the electrode terminals of the battery cells 12 by welding. The electrical energy of the multiple battery cells 12 can be further led out through the housing 11 via a conductive mechanism.
[0086] The number of battery cells 12 can be set to any value depending on different power requirements. Multiple battery cells 12 can be connected in series, parallel, or mixed connection to achieve a larger capacity or power. Since each battery device 100 may include a large number of battery cells 12, for ease of installation, the battery cells 12 can be grouped, with each group of battery cells 12 forming a battery cell assembly. The number of battery cells 12 included in a battery cell assembly is unlimited and can be set according to requirements. The battery device 100 may include multiple battery cell assemblies, which can be connected in series, parallel, or mixed connection.
[0087] According to some embodiments of this application, please refer to Figures 3-7This application provides a battery device 100, which includes a housing 11, a battery cell 12, and a protective plate 13. The battery cell 12 is disposed inside the housing 11. Along the direction of gravity, the protective plate 13 is disposed at the bottom of the battery cell 12. The protective plate 13 includes a first fiber resin layer 131, a reinforcing layer 134, a second fiber resin layer 132, and a supplementary layer 135. The protective plate 13 includes a first region 133 and a second region 136. In the first region 133, the first fiber resin layer 131, the reinforcing layer 134, and the second fiber resin layer 132 are sequentially stacked, with the first fiber resin layer 131 located on the side of the reinforcing layer 134 facing the battery cell 12. Within the second region 136, the first fiber resin layer 131, the second fiber resin layer 132, and the reinforcing layer 135 are stacked sequentially; or, the reinforcing layer 135, the first fiber resin layer 131, and the second fiber resin layer 132 are stacked sequentially; or, the first fiber resin layer 131, the reinforcing layer 135, and the second fiber resin layer 132 are stacked sequentially; wherein, the reinforcing layer 135 includes multiple layers of mutually stacked unidirectional fiber prepreg tapes, the fibers 139 in each layer of unidirectional fiber prepreg tapes are arranged in a unidirectional manner, and the fiber 139 in each layer of unidirectional fiber prepreg tapes are arranged in the same direction.
[0088] Along the direction of gravity, the protective plate 13 is located at the bottom of the battery cell 12. Taking the vehicle 1000 as an example, the bottom of the box 11 can refer to the side of the box 11 closest to the ground after the battery device 100 is installed on the vehicle 1000.
[0089] In some embodiments, the thickness direction of the protective plate 13 is parallel to the direction of gravity.
[0090] In some embodiments, the second fiber resin layer 132 is closer to the ground than the first fiber resin layer 131.
[0091] In some embodiments, the first fiber resin layer 131 is closer to the battery cell 12 than the second fiber resin layer 132.
[0092] In some embodiments, the housing 11 includes a frame surrounding the protective plate 13, and the housing 11 also includes a support plate for supporting the battery cell 12; the support plate is located between the protective plate 13 and the battery cell 12 along the thickness direction of the protective plate 13.
[0093] In some embodiments, the reinforcing layer 134 is made of metal.
[0094] In some embodiments, the reinforcing layer 134 is made of at least one of steel, titanium, ceramic, and high-strength plastic.
[0095] In some embodiments, the first fiber resin layer 131 is independently selected from glass fiber reinforced polyamide resin, glass fiber reinforced polypropylene resin, glass fiber reinforced polyethylene resin, glass fiber reinforced polycarbonate resin, or glass fiber reinforced polystyrene resin; and / or, the second fiber resin layer 132 is independently selected from glass fiber reinforced polyamide resin, glass fiber reinforced polypropylene resin, glass fiber reinforced polyethylene resin, glass fiber reinforced polycarbonate resin, or glass fiber reinforced polystyrene resin.
[0096] In some embodiments, the first fiber resin layer 131 comprises multiple layers of first fiber-reinforced prepreg; and / or, the second fiber resin layer 132 comprises multiple layers of second fiber-reinforced prepreg.
[0097] In some embodiments, the fibers 139 in each layer of the first fiber-reinforced prepreg are arranged in a unidirectional direction, and the fiber 139 of adjacent layers of the first fiber-reinforced prepreg are staggered at approximately 90°. The allowable deviation range of the layup angle of the unidirectional strips of adjacent layers of the first fiber-reinforced prepreg is ±20°. When subjected to tensile force along the extension direction of the fiber 139, the fibers 139 in the first fiber-reinforced prepreg can effectively bear the tensile force. By staggering the fiber 139 of adjacent layers of the first fiber-reinforced prepreg at approximately 90°, it is beneficial to improve the uniformity of stress on the first fiber resin layer 131 in all directions.
[0098] In some embodiments, the reinforcing layer 135 is a fiber resin layer.
[0099] In some cases, the orientation of the fibers 139 can be determined by observing the exposed fibers 139 after the reinforcing layer 135 has been ablated at high temperature for a certain period of time.
[0100] In some embodiments, when the deviation of the fiber 139 arrangement direction in each layer of fiber prepreg unidirectional tape is within ±45°, it can also be understood that the fiber 139 in each layer of fiber prepreg unidirectional tape is arranged in a unidirectional direction and the fiber 139 arrangement direction in each layer of fiber prepreg unidirectional tape is the same.
[0101] In the above scheme, because the fibers 139 in each layer of the multi-layered, stacked unidirectional fiber prepreg tape of the reinforcing layer 135 are arranged in a unidirectional direction, and the fiber 139 in each layer of the unidirectional fiber prepreg tape are arranged in the same direction, on the one hand, the stress on the reinforcing layer 135 is more uniform at various locations after being subjected to force, and the path of external force transmission is basically consistent, reducing the risk of stress concentration. On the other hand, the continuous arrangement of the fibers 139 in the same direction can jointly resist external impact, improve the tensile strength of the reinforcing layer 135, and reduce the risk of deformation of the reinforcing layer 135. Furthermore, the reinforcing layer 135 can also achieve both high strength and light weight.
[0102] According to some embodiments of this application, please refer to Figures 3-7 The reinforcing layer 135 is a fiber resin frame, which surrounds the reinforcing layer 134. The fiber resin frame includes multiple frame segments 137 connected end to end. Each frame segment 137 includes multiple layers of sub-fiber prepreg unidirectional tapes. The fibers 139 in each layer of sub-fiber prepreg unidirectional tapes are arranged in a unidirectional direction, and the fibers 139 in each layer of sub-fiber prepreg unidirectional tapes are arranged in the same direction.
[0103] The shape of the fiber resin frame can be polygonal, circular, semi-circular, elliptical, irregular, etc.
[0104] In some embodiments, please refer to Figure 4 The fiber resin frame includes six frame segments 137, which are generally enclosed to form a hexagon.
[0105] When the deviation of the fiber 139 arrangement direction in the unidirectional tape of each layer of sub-fiber prepreg is within ±45°, it can also be understood that the fiber 139 in the unidirectional tape of each layer of sub-fiber prepreg is arranged in a unidirectional direction and the fiber 139 in the unidirectional tape of each layer of sub-fiber prepreg has the same arrangement direction.
[0106] In the above scheme, the fibers 139 in the unidirectional tape of each sub-fiber prepreg layer in each frame segment 137 are arranged in the same direction, which can make each frame segment 137 of the reinforcing layer 135 have high bending strength, thereby further improving the reliability of the reinforcing layer 135.
[0107] According to some embodiments of this application, please refer to Figures 3-7 The fibers 139 in the unidirectional belts of the fiber prepreg in two adjacent frame segments 137 are broken.
[0108] Please refer to Figure 4 In the two adjacent frame segments 137, the fibers 139 in the unidirectional strips of the fiber prepreg are broken; in other words, during layup, the fibers 139 extend in a unidirectional direction rather than in a frame structure. For example, the fibers 139 are laid up in such a way that their extension direction is parallel to the length direction of their respective frame segment 137.
[0109] The fibers 139 in the unidirectional belts of the fiber prepreg in two adjacent frame segments 137 can contact each other on the basis of the broken blocks, or they can be set at intervals.
[0110] Please refer to Figure 4 , Figure 4 The dotted line in the diagram indicates the location and direction of extension of fiber 139.
[0111] In the above scheme, since the fibers 139 in the unidirectional belt of the fiber prepreg in the two adjacent frame segments 137 are broken, on the one hand, the risk of the fibers 139 being broken due to excessive bending during the molding of the reinforcing layer 135 can be reduced. On the other hand, the risk of defects such as cracks or voids appearing in the reinforcing layer 135 due to excessive displacement of two fibers 139 at an angle during the molding of the reinforcing layer 135 can also be reduced.
[0112] According to some embodiments of this application, please refer to Figures 3-7 The fiber 139 in the sub-fiber prepreg unidirectional belt of each frame segment 137 is arranged in a direction parallel to the length direction of its respective frame segment 137.
[0113] The fiber 139 in the sub-fiber prepreg unidirectional tape of each frame segment 137 is arranged in a direction parallel to the length direction of its respective frame segment 137, which means that the fiber 139 can be designed to be as long as possible.
[0114] In the above scheme, the fiber 139 is arranged in a direction parallel to the length direction of its corresponding frame segment 137, which can maximize the bending strength of each frame segment 137 and further improve the reliability of the reinforcing layer 135.
[0115] According to some embodiments of this application, the mass content of fiber 139 in the reinforcing layer 135 is W, which satisfies: 50% ≤ W ≤ 75%.
[0116] The mass content of fiber 139 in the reinforcing layer 135 can be any value between 50% and 75%, for example, any one of 50%, 55%, 60%, 65%, 70%, 75%, etc., or a range between any two.
[0117] In some cases, the mass content of fiber 139 in reinforcing layer 135 can be determined with reference to GB / T 2577 Test Method for Resin Content in Glass Fiber Reinforced Plastics.
[0118] In the above scheme, when W≥50%, the reinforcing layer 135 has high flexural strength, which is beneficial to improving the impact resistance of the reinforcing layer 135 and thus improving the reliability of the reinforcing layer 135; when W≤75%, the resin has strong fluidity, the flatness of the reinforcing layer 135 is high, and the energy absorption capacity of the reinforcing layer 135 is stronger when the resin content is higher, and the risk of brittle fracture of the fiber 139 is lower; therefore, when 50%≤W≤75%, while ensuring that the reinforcing layer 135 has high flexural strength, the risk of brittle fracture of the fiber 139 can also be reduced.
[0119] According to some embodiments of this application, 60% ≤ W ≤ 75%.
[0120] The mass content of fiber 139 in the reinforcing layer 135 can be any value between 60% and 75%, for example, any one of the following values or a range between any two: 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%.
[0121] In the above scheme, when W≥60%, the bending strength of the reinforcing layer 135 can be further improved, thereby further improving the reliability of the reinforcing layer 135; when W≤75%, the risk of brittle fracture of fiber 139 can be further reduced; therefore, when 60%≤W≤75%, while further improving the bending strength of the reinforcing layer 135, the risk of brittle fracture of fiber 139 can also be further reduced.
[0122] According to some embodiments of this application, please refer to Figures 3-7 The protective plate 13 also includes an adhesive layer 138, the reinforcing layer 134 is connected to the first fiber resin layer 131 through the adhesive layer 138, and / or the reinforcing layer 134 is connected to the second fiber resin layer 132 through the adhesive layer 138.
[0123] In some embodiments, the adhesive layer 138 may be in the form of a thin film, pre-laid at a designated position before the protective plate 13 is processed, and automatically achieves the effect of bonding the two parts of the protective plate 13 during the molding or extrusion process.
[0124] In some embodiments, the adhesive layer 138 may be a resin film.
[0125] In the above scheme, by setting the adhesive layer 138, the connection between the various parts of the protective plate 13 can be made tighter and the structure more stable.
[0126] According to some embodiments of this application, please refer to Figures 3-7 The thickness of the adhesive layer 138 is H1, which satisfies: 0 < H1 ≤ 0.5 mm.
[0127] The thickness of the adhesive layer 140 can be any value between 0 and 0.5 mm, such as any one of the following values or a range between any two: 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm.
[0128] In the above scheme, when H1 > 0 mm, the bonding strength of each part of the protective plate 13 is higher and the structural stability is stronger, so that the battery device 100 has higher reliability; when H1 ≤ 0.5 mm, the space occupied by the adhesive layer 138 is smaller and the energy density of the battery device 100 is higher; therefore, when 0 mm < H1 ≤ 0.5 mm, the battery device 100 can balance high reliability and energy density.
[0129] According to some embodiments of this application, please refer to Figures 3-7 The thickness of the first fiber resin layer 131 is less than or equal to the thickness of the second fiber resin layer 132.
[0130] Taking the vehicle 1000 as an example, the second fiber resin layer 132 may be exposed to the external environment. The thickness of the first fiber resin layer 131 is less than or equal to the thickness of the second fiber resin layer 132. While the protective plate 13 has a high energy density, it can also reduce the risk of the protective plate 13 failing due to external force acting on it.
[0131] In the above scheme, since the thickness of the first fiber resin layer 131 is less than or equal to the thickness of the second fiber resin layer 132, the second fiber resin layer 132 has higher structural strength, which can reduce the risk of excessive deformation of the protective plate 13 and corrosion of the reinforcing layer 134 caused by external force acting on the protective plate 13 after the second fiber resin layer 132 acts on it.
[0132] According to some embodiments of this application, please refer to Figures 3-7 The thickness of the first fiber resin layer 131 is H2, satisfying 0mm < H2 ≤ 1.2mm; and / or the thickness of the second fiber resin layer 132 is H3, satisfying 0mm < H3 ≤ 1.2mm.
[0133] The thickness of the first fiber resin layer 131 can be any value between 0 mm and 1.2 mm, for example, any one of the following values or a range between any two: 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm.
[0134] The thickness of the second fiber resin layer 132 can be any value between 0 mm and 1.2 mm, such as any one of the following values or a range between any two: 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, and 1.2 mm.
[0135] In the above scheme, when H2 > 0 mm, the first fiber resin layer 131 has a strong ability to uniformly distribute load, which can weaken the impact force transmitted to the battery cell 12; when H2 ≤ 1.2 mm, the space occupied by the first fiber resin layer 131 is small, and the battery has a high energy density; therefore, when 0 mm ≤ H3 ≤ 1.2 mm, while the first fiber resin layer 131 has a strong ability to uniformly distribute load, the battery can also have a high energy density.
[0136] When H3 > 0 mm, the second fiber resin layer 132 has a large thickness and a strong ability to resist the impact of gravel; when H3 ≤ 1.2 mm, the second fiber resin layer 132 occupies a small space, and the battery device 100 has a high energy density; therefore, when 0 mm ≤ H3 ≤ 1.2 mm, while the second fiber resin layer 132 has a strong ability to resist the impact of gravel, the battery device 100 can also have a high energy density.
[0137] According to some embodiments of this application, please refer to Figures 3-7 The thickness of the reinforcing layer 134 is H4, which satisfies the condition: 0mm < H4 ≤ 1.5mm.
[0138] The thickness of the reinforcing layer 134 can be any value between 0 mm and 1.5 mm, such as any one of the following values or a range between any two: 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, and 1.5 mm.
[0139] In the above scheme, when H4 > 0 mm, the reinforcing layer 134 has a large thickness and the protective plate 13 has high structural strength; when H4 ≤ 1.5 mm, the reinforcing layer 134 occupies a small space and the battery device 100 has high energy density; therefore, when 0 mm ≤ H4 ≤ 1.5 mm, the battery device 100 can balance high structural strength and energy density.
[0140] According to some embodiments of this application, please refer to Figures 3-7 Within the second region 136, the first fiber resin layer 131, the reinforcing layer 135, and the second fiber resin layer 132 are stacked sequentially, and the thickness of the reinforcing layer 135 is greater than or equal to the thickness of the reinforcing layer 134.
[0141] In some embodiments, the reinforcing layer 134 has two surfaces disposed opposite to each other along its thickness direction, and the reinforcing layer 135 covers the two surfaces and connects the first fiber resin layer 131 and the second fiber resin layer 132.
[0142] In the above scheme, since the thickness of the reinforcing layer 135 is greater than or equal to the thickness of the reinforcing layer 134, the risk of the reinforcing layer 134 being exposed is further reduced, thereby further improving the corrosion resistance of the reinforcing layer 134.
[0143] According to some embodiments of this application, please refer to Figures 3-7 The first fiber resin layer 131 includes n layers of first fiber-reinforced prepreg stacked on top of each other, and the second fiber resin layer 132 includes m layers of second fiber-reinforced prepreg stacked on top of each other; wherein, one of n and m is an odd number, and the other of n and m is an even number.
[0144] n can be any odd number, such as 1, 3, 5, 7, 9, 11, etc. n can also be any even number, such as 2, 4, 6, 8, 10, 12, etc.
[0145] m can be any odd number, such as 1, 3, 5, 7, 9, 11, etc. m can also be any even number, such as 2, 4, 6, 8, 10, 12, etc.
[0146] In the above scheme, odd-numbered layers can enhance shear resistance and disperse local stress, while even-numbered layers have a lower risk of warping deformation. When one of n and m is odd and the other of n and m is even, the protective plate 13 can achieve both better shear resistance and better structural stability.
[0147] According to some embodiments of this application, n is an odd number and m is an even number.
[0148] In the above solution, since the second fiber resin layer 132 is closer to the outside of the battery device 100, the flatness of the outer fiber resin layer can be improved, and the risk of the second fiber resin layer 132 being scratched by foreign objects can be reduced.
[0149] According to some embodiments of this application, the second region 136 is disposed around the first region 133.
[0150] In some embodiments, the reinforcing layer 135 is disposed around the reinforcing layer 134.
[0151] In the above scheme, since the second region 136 surrounds the first region 133, the overall strength distribution of the protective plate 13 is relatively uniform, and the structural stability is strong. Furthermore, in the embodiment where the protective plate 13 is connected to the housing 11 via the second region 136, the risk of corrosion of the reinforcing layer 134 within the first region 133 due to sealing failure during the connection process between the protective plate 13 and the housing 11 can be reduced.
[0152] According to some embodiments of this application, please refer to Figure 1This application provides an electrical device, which includes the battery device 100 in the above embodiments, and the battery device 100 is used to provide electrical energy.
[0153] In the above solutions, since the battery device 100 in one or more of the above embodiments has high reliability, the power-consuming device including the battery device 100 in one or more of the above embodiments also has high reliability.
[0154] According to some embodiments of this application, please refer to Figures 4-7 This application provides a battery device 100, which includes a housing 11, a battery cell 12, and a protective plate 13. The battery cell 12 is disposed inside the housing 11. Along the direction of gravity, the protective plate 13 is disposed at the bottom of the battery cell 12. The protective plate 13 includes a first fiber resin layer 131, a reinforcing layer 134, a second fiber resin layer 132, and a supplementary layer 135. The protective plate 13 includes a first region 133 and a second region 136. The second region 136 is disposed around the first region 133. Within the first region 133, the first fiber resin layer 131, the reinforcing layer 134, and the second fiber resin layer 132 are sequentially stacked. The first fiber resin layer 131 is located on the side of the reinforcing layer 134 facing the battery cell 12. Within the second region 136, a first fiber resin layer 131, a reinforcing layer 135, and a second fiber resin layer 132 are sequentially stacked. The reinforcing layer 135 comprises multiple layers of stacked unidirectional fiber prepreg tapes, with fibers 139 arranged unidirectionally in each layer, and the fibers 139 in each layer having the same orientation. The reinforcing layer 135 is a fiber resin frame surrounding the reinforcing layer 134. The fiber resin frame comprises multiple interconnected frame segments 137, each frame segment 137 comprising multiple layers of stacked sub-fiber prepreg tapes, with fibers 139 arranged unidirectionally in each layer, and the fibers 139 in each layer having the same orientation. The fibers 139 in the unidirectional fiber prepreg tapes of adjacent frame segments 137 are disconnected. The fiber 139 in the sub-fiber prepreg unidirectional tape of each frame segment 137 is arranged in a direction parallel to the length direction of its respective frame segment 137. The thickness of the reinforcing layer 135 is greater than or equal to the thickness of the reinforcing layer 134. The first fiber resin layer 131 comprises an odd number of layers of first fiber-reinforced prepreg stacked on top of each other, and the second fiber resin layer 132 comprises an even number of layers of second fiber-reinforced prepreg stacked on top of each other.
[0155] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A battery device, characterized in that, include: Box; A battery cell, wherein the battery cell is disposed within the housing; A protective plate is disposed at the bottom of the battery cell along the direction of gravity. The protective plate includes a first fiber resin layer, a reinforcing layer, a second fiber resin layer, and a supplementary layer. The protective plate includes a first region and a second region. In the first region, the first fiber resin layer, the reinforcing layer and the second fiber resin layer are stacked sequentially, with the first fiber resin layer located on the side of the reinforcing layer facing the battery cell; In the second region, the first fiber resin layer, the second fiber resin layer, and the reinforcing layer are stacked sequentially; or, the reinforcing layer, the first fiber resin layer, and the second fiber resin layer are stacked sequentially; or, the first fiber resin layer, the reinforcing layer, and the second fiber resin layer are stacked sequentially. The reinforcing layer comprises multiple layers of unidirectional fiber prepreg tapes, with the fibers in each layer of unidirectional fiber prepreg tape arranged in a unidirectional direction and having the same fiber arrangement direction.
2. The battery device according to claim 1, characterized in that, The reinforcing layer is a fiber resin frame, which surrounds the reinforcing layer. The fiber resin frame includes multiple frame segments connected end to end. Each frame segment includes multiple layers of unidirectional sub-fiber prepreg tapes stacked on top of each other. The fibers in each layer of unidirectional sub-fiber prepreg tapes are arranged in a unidirectional direction, and the fiber arrangement direction in each layer of unidirectional sub-fiber prepreg tapes is the same.
3. The battery device according to claim 2, characterized in that, The fibers in the unidirectional belts of the fiber prepreg in two adjacent frame segments are broken.
4. The battery device according to claim 2, characterized in that, The fiber arrangement direction in the sub-fiber prepreg unidirectional tape of each frame segment is parallel to the length direction of the frame segment to which it belongs.
5. The battery device according to claim 1, characterized in that, The fiber content in the reinforcing layer is W, which satisfies the following condition: 50% ≤ W ≤ 75%.
6. The battery device according to claim 1, characterized in that, 60％≤W≤75％。 7. The battery device according to claim 1, characterized in that, The protective panel further includes an adhesive layer, through which the reinforcing layer is connected to the first fiber resin layer, and / or, through which the reinforcing layer is connected to the second fiber resin layer.
8. The battery device according to claim 7, characterized in that, The thickness of the adhesive layer is H1, which satisfies the following condition: 0mm < H1 ≤ 0.5mm.
9. The battery device according to claim 1, characterized in that, The thickness of the first fiber resin layer is less than or equal to the thickness of the second fiber resin layer.
10. The battery device according to claim 1, characterized in that, The thickness of the first fiber resin layer is H2, which satisfies the condition 0mm < H2 ≤ 1.2mm; And / or, the thickness of the second fiber resin layer is H3, satisfying 0mm < H3 ≤ 1.2mm.
11. The battery device according to claim 1, characterized in that, The thickness of the reinforcing layer is H4, which satisfies: 0mm < H4 ≤ 1.5mm.
12. The battery device according to claim 1, characterized in that, In the second region, the first fiber resin layer, the reinforcing layer, and the second fiber resin layer are stacked sequentially, and the thickness of the reinforcing layer is greater than or equal to the thickness of the reinforcing layer.
13. The battery device according to claim 1, characterized in that, The first fiber resin layer comprises n layers of first fiber-reinforced prepreg stacked on top of each other, and the second fiber resin layer comprises m layers of second fiber-reinforced prepreg stacked on top of each other. In this case, one of n and m is odd, and the other of n and m is even.
14. The battery device according to claim 1, characterized in that, n is an odd number, and m is an even number.
15. The battery device according to claim 1, characterized in that, The second region is arranged around the first region.
16. An electrical appliance, characterized in that, Includes a battery device as described in any one of claims 1-15, the battery device being used to provide electrical energy.