Energy storage wall plate and electric equipment comprising same

Abstract

The utility model provides an energy storage wall plate and electric equipment. Wherein the energy storage wall plate comprises a first panel; the second panel is arranged relative to the first panel in a first direction; the core layer is located between the first panel and the second panel in the first direction, the core layer comprises a plurality of core units which are adjacently arranged, the core layer comprises a connecting area and a containing area, and the two ends, in the first direction, of the core units forming the connecting area are fixedly connected with the first panel and the second panel correspondingly; the height of the core unit forming the accommodating area in the first direction is at least partially cut off, and the side wall of the core unit comprising the adjacent connecting area in the accommodating area provides the side surface of the accommodating area; the electrochemical energy storage device is arranged in the accommodating space, and the shape of the accommodating space is matched with the surface of the electrochemical energy storage device; wherein the surface of the electrochemical energy storage device is fixedly connected with the accommodating area through a bonding structure.

Description

Technical Field

[0001] The present application relates to an energy storage wall panel and an electrical device comprising the same. Background Art

[0002] In electrical equipment, such as spacecraft, specifically, artificial satellites, batteries as energy storage devices and wall panels as structural support components are generally provided separately, and the integration is low. In the aerospace field, which has a high requirement for lightweight, further improvements are needed.

[0003] In a comparative scheme, a sandwich structure of an upper honeycomb panel, a middle honeycomb panel and a lower honeycomb panel is adopted, and the upper honeycomb panel, the middle honeycomb panel and the lower honeycomb panel are connected by bolts using different forms of backplane connectors. The electronic equipment in the panel is installed in the installation slot in the middle honeycomb panel, and the installation slot can also be used to place a lithium battery pack, which is installed on the lower honeycomb panel or the structural frame by screws.

[0004] However, the inventors found that the above solution, due to the use of screws and bolts to install the lithium battery pack, still results in a heavy overall weight of the back panel, which cannot meet the lightweight requirements of weight-sensitive scenarios, such as aerospace and aviation scenarios.

[0005] In addition, since screws require additional holes, the screw-hole connection structure may cause stress concentration and become a weak point that is easily damaged. Especially when a lithium battery is installed in the installation slot, its easily damaged nature will also lead to the risk of safety problems caused by collisions of the lithium battery.

[0006] Therefore, there is a need in the art for a new energy storage wall panel and electrical equipment including the same, so as to realize the integration of the two functions of energy storage and structural support while taking into account the lightweight and structural reliability of the energy storage wall panel. Utility Model Content

[0007] The purpose of this application is to provide an energy storage wall panel.

[0008] Another object of the present application is to provide an electrical device.

[0009] According to the first aspect of the present application, an energy storage wall panel includes a first panel; a second panel, which is arranged relative to the first panel in a first direction; a core layer, which is located between the first panel and the second panel in the first direction, and the core layer includes a plurality of core units arranged adjacent to each other, and the core layer includes a connection area and a receiving area, the core units constituting the connection area are fixedly connected to the first panel and the second panel at both ends in the first direction, respectively, the core units constituting the receiving area are at least partially cut off in height in the first direction, the receiving area includes side walls of the core units of the adjacent connection areas providing the side surfaces of the receiving area, and the first panel and the second panel providing the bottom surface of at least one receiving area; an electrochemical energy storage device is arranged in the receiving area, and the shape of the receiving area matches the surface of the electrochemical energy storage device; wherein the surface of the electrochemical energy storage device is fixedly connected to the receiving area by an adhesive structure.

[0010] The technical solution of the energy storage wall panel introduced above, by fixing the surface of the electrochemical energy storage device with the accommodating area through an adhesive structure, realizes the integration of the two functions of energy storage and structural support, while taking into account the lightweight and structural reliability of the energy storage wall panel. Specifically, through the adhesive structure, it is unnecessary to use screws and other connectors in the energy storage wall panel, which reduces the number of parts, reduces the weight of the wall panel, achieves a lightweight effect, and also reduces the stress concentration at the opening and the screw-hole connection. The adhesive structure maintains the structural integrity of the wall panel. And the inventor found that by comparing the adhesive structure with the non-adhesive physical contact limiting structure, the adhesive structure achieves a significant delay in failure and a significant improvement in energy absorption. The adhesive force connects the electrochemical energy storage device and the core layer to be stressed as a whole.

[0011] In one or more embodiments of the energy storage wall plate, the side surface of the electrochemical energy storage device is fixedly connected to the side surface of the accommodating area via a first adhesive structure.

[0012] In one or more embodiments of the energy storage wall panel, the bottom surface of the electrochemical energy storage device is fixedly connected to the bottom surface of the accommodating area via a second adhesive structure; and / or the core unit is fixedly connected to the first panel and / or the second panel via a third adhesive structure.

[0013] In one or more embodiments of the energy storage wall panel, the first panel and / or the second panel is a composite material panel, and a conductor is provided on the first panel or the second panel providing the bottom surface of the accommodating area, the conductor is electrically connected to the electrochemical energy storage device, and the conductor can be bonded to the composite material panel without glue; or, the first panel and / or the second panel is an aluminum alloy panel.

[0014] In one or more embodiments of the energy storage wall plate, the conductor is a pure nickel sheet, an aluminum-nickel composite sheet, a nickel-plated steel sheet, a nickel-plated copper sheet, a pure copper sheet, or a tin-plated copper sheet.

[0015] In one or more embodiments of the energy storage wall panel, the first panel or the second panel is integrated with a battery management system for controlling the electrochemical energy storage device.

[0016] In one or more embodiments of the energy storage wall panel, the electrochemical energy storage device is a solid-state battery.

[0017] In one or more embodiments of the energy storage wall panel, the outer surface of the first panel or the second panel in the first direction provides the outer surface of the energy storage wall panel, and a photovoltaic panel is arranged on the outer surface.

[0018] An electrical device according to the second aspect of the present application includes the energy storage wall panel as described in the first aspect.

[0019] In one or more embodiments of the electrical equipment, the electrical equipment includes an artificial satellite, a space building, a space station, and an aircraft; the energy storage wall panels provide at least part of the wall panels of the artificial satellite, at least part of the fuselage and wings of the aircraft, at least part of the structural panels of the space building, and at least part of the wall panels of the space station.

[0020] The beneficial effects of the above embodiments include, but are not limited to, the energy storage wall panels introduced in the first aspect are adopted, which have a compact structure, high integration, and good structural reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other features, properties and advantages of the present application will become more apparent through the following description in conjunction with the accompanying drawings and embodiments. In the accompanying drawings, the same reference numerals always represent the same features. It should be noted that these drawings are only examples and are not drawn in proportion. They should not be used to limit the actual scope of protection claimed in the present application. Among them:

[0022] Figure 1 The present invention is a structural schematic diagram of an electrical equipment.

[0023] Figure 2 It is a schematic structural diagram of an energy storage wall panel according to an embodiment.

[0024] Figure 3A , Figure 3B It is a structural schematic diagram of a cross-sectional view of an energy storage wall panel of an embodiment.

[0025] Figure 4A , Figure 4BIt is a schematic structural diagram of a core unit and an electrochemical energy storage device of an energy storage wall panel according to an embodiment.

[0026] Figure 5 This is a schematic structural diagram of an energy storage wall panel from an external perspective of another embodiment.

[0027] Figure 6 It is a schematic structural diagram of an energy storage wall panel according to an embodiment.

[0028] Figure 7 It is a comparison curve of the peak load and failure displacement of the energy storage wall panel of an embodiment and the comparative example.

[0029] Figure 8 It is a curve diagram of internal stress and time of an energy storage wall plate of an embodiment and a comparative example.

[0030] 9A to 9C It is a cloud diagram of the interface damage evolution and contact pressure distribution of the electrochemical energy storage device of the energy storage wall plate of an embodiment and a comparative example.

[0031] FIG. 10A to FIG. 10C It is a cloud diagram of failure analysis of an embodiment and a comparative example and stress distribution of an energy storage wall panel.

[0032] Reference numerals:

[0033] 100-Electrical equipment

[0034] 10-Energy storage wall panels

[0035] 1- First Panel

[0036] 2- Second Panel

[0037] 3-Core layer

[0038] 31-core unit

[0039] 301-Connection Zone

[0040] 302-Accommodation area

[0041] 3021-Side of the accommodation area

[0042] 3022- Bottom of the receiving area

[0043] 4-Electrochemical Energy Storage Devices

[0044] 41-Side view of electrochemical energy storage device

[0045] 42- Bottom surface of electrochemical energy storage device

[0046] 51-first bonding structure

[0047] 52-Second bonding structure

[0048] 53-Third bonding structure

[0049] 7-Battery Management System

[0050] 8- Photovoltaic panels. DETAILED DESCRIPTION

[0051] Reference will now be made in detail to the various embodiments of the application, the examples of which are shown in the accompanying drawings and are described below. Although the application will be described in conjunction with the exemplary embodiments, it should be appreciated that this specification is not intended to limit the application to those exemplary embodiments. On the contrary, the application is intended to not only cover these exemplary embodiments, but also to cover various alternative forms, modified forms, equivalent forms and other embodiments that may be included in the spirit and scope of the application defined by the appended claims.

[0052] In the subsequent description, the orientation or position relationship indicated by "up", "down", "left", "right", "front", "back" or other directional terms is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0053] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment" and / or "an embodiment" means a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0054] The energy storage wall panel 10 introduced in the following embodiment is suitable for aerospace and aviation fields with high requirements for lightweight, such as artificial satellites, space buildings, space stations, aircraft, etc., so as to achieve the effect of ensuring lightweight and reliable structural strength on the basis of integrating energy storage and supporting structures.

[0055] For example Figure 1 As shown, the energy storage wall panel 10 is used Figure 1The electrical equipment 100 shown is a wall panel of an artificial satellite, that is, the energy storage wall panel 10 provides at least part of the wall panel of the artificial satellite, for example, it can be a wall panel that provides all six surfaces of the artificial satellite, or it can be a wall panel of a partial surface. In addition, the energy storage wall panel 10 is not limited to a flat plate structure, and can be a curved surface, a curved surface, and the like. The energy storage wall panel 10 can also be used in space buildings, for example, to provide at least part of the structural panels of space buildings, such as providing at least part of the wall panels, floor panels and other structural panels, for example, it can also be used to provide the wall panels of a space station. The energy storage wall panel 10 can also be used in aircraft, such as civil and military drones, and can also be used in large aircraft, for example, to provide electrical energy for the drive motors of hybrid and electric large aircraft, and can also be used as aircraft equipment for large aircraft with traditional gas turbine engines. The energy storage wall panel 10 is used in aircraft to provide at least part of the fuselage and wings of the aircraft. The energy storage wall panels 10 not only serve as structural parts of the fuselage and wings, but also provide power for the operation of the aircraft, thereby significantly reducing the weight of the aircraft, thereby significantly improving the cruising range of the aircraft, especially the electric cruising range of the aircraft; in addition, by "distributing" energy storage devices such as batteries to the energy storage wall panels that constitute the fuselage and wings, the space originally used for the special arrangement of batteries is saved, making the structure of artificial satellites, space stations, space buildings, and aircraft more compact, and freeing up more layout space and / or storage space for accommodating people and / or objects.

[0056] However, it can be understood that the energy storage wallboard 10 introduced in the following embodiments is not limited to the aerospace and aviation fields such as artificial satellites, space buildings, space stations, and aircraft. For example, it can be applied to other occasions of electrical equipment, such as mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric skateboards, electric balance cars, electric vehicles, trains, and ships. Electric vehicles can include pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric golf carts, electric trucks, etc. Electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. The electrical device can also be an energy storage system, such as large-scale commercial energy storage, microgrid energy storage, base station products, household uninterruptible power supply energy storage, etc. As long as the energy storage and support structure integration can be achieved on the application object, while ensuring the effects of lightweight and reliable structural strength, the application scope of the energy storage wallboard 10 of this application is met.

[0057] refer to Figures 2 to 6As shown, the energy storage wall panel 10 may include a first panel 1, a second panel 2, and a core layer 3. The second panel 2 is arranged relative to the first panel 1 in a first direction. The first direction may be, for example, the up and down direction shown in the figure, but is not limited thereto. Depending on the arrangement position of the wall panel, it may also be in the left and right direction, the front and back direction, etc. The energy storage wall panel 10 indicates that in addition to serving as a load-bearing structural member, the main function of the component is energy storage, that is, most or even all of the electronic devices integrated in the wall panel may be electrochemical energy storage devices, but the possibility of integrating a small number of electrical devices into the wall panel is not excluded.

[0058] The specific structure of the first panel 1 and the second panel 2 mentioned above can be a single-layer panel structure, for example, an aluminum alloy panel made of aluminum alloy materials commonly used in the aviation and aerospace fields, referred to as an aluminum plate. Since the mechanical properties of aluminum plates and related application scenarios are relatively mature, the solution of using aluminum plates is easy to implement and saves the research and development cycle. However, this is not a limitation. For example, it can be a composite material panel. The composite material of the composite material panel is a resin-based composite material with resin as the matrix and fiber as the reinforcement. The resin can be a thermosetting resin, a thermoplastic resin, such as epoxy resin, unsaturated polyester resin, and various modified or blended matrix epoxy resins. The fiber can be carbon fiber, glass fiber, natural fiber, aramid fiber, etc., which is not limited to this.

[0059] The core layer 3 is located between the first panel 1 and the second panel 2 in the first direction, and the core layer 3 includes a plurality of core units 31 arranged adjacent to each other. The core unit 31 of the core layer 3 is generally a regular hexagonal cross-sectional structure, which is called a honeycomb core unit or a honeycomb core layer, but it can be understood that the cross-sectional structure of the core unit 31 can also be a rectangular, square, sinusoidal, diamond, double bell-shaped, etc., and is not limited to a regular hexagon. The material of the core layer can be aluminum alloy, glass fiber fabric impregnated with resin, aramid fiber paper, kraft paper, graphite fiber, Kevlar fiber, etc., which can be selected according to the needs of the actual application scenario.

[0060] The core layer 3 includes a connection area 301 and a receiving area 302. The core unit 31 constituting the connection area 301 is fixedly connected to the first panel 1 and the second panel 2 at both ends in the first direction. The specific structure of the core unit 31 being fixedly connected to the first panel 1 and the second panel 2 at both ends in the first direction may be, for example, a bonding structure using glue or a non-glue bonding structure using thermal curing. Similar to a common honeycomb panel, the core layer 3 forms a sandwich structure composite panel between the first panel 1 and the second panel 2.

[0061] The core unit 31 constituting the receiving area 302 is at least partially cut away in height in the first direction, for example Figure 3A , Figure 3BThe height of the part shown is cut off, and the bottom surface of the accommodating area 302 is formed by a bottom surface of the core unit 31 of the remaining height, and the first panel 1 or the second panel 2, and the first panel 1 is shown in the figure. However, it is not limited to this, and the entire height can also be cut off. At this time, the two bottom surfaces of the accommodating area 302 are formed by the first panel 1 and the second panel 2. The accommodating area 302 includes the side wall of the core unit 31 of the adjacent connecting area 301 to provide the side surface 3021 of the accommodating area, and the first panel 1 and the second panel 2 provide at least one bottom surface 3022 of the accommodating area. The bottom surface here means the end surface located at both ends of the side surface, so both ends are bottom surfaces, and are not distinguished as top surfaces and bottom surfaces due to the different upper and lower positions.

[0062] The electrochemical energy storage device 4 is arranged in the accommodating area 302, and the shape of the accommodating area 302 matches the surface of the electrochemical energy storage device 4. The process of arranging the connection area 301 and the accommodating area 302 in the core layer 3 can be that in the process of manufacturing the core layer, the core layer 3 is cut into a shape that matches the electrochemical energy storage device 4 by precise cutting technology, such as a vibration knife, a drag knife, a water jet cutting, CNC milling, etc., so that the electrochemical energy storage device 4 can be tightly embedded in the accommodating area 302, and even if there is no bonding structure, the electrochemical energy storage device 4 and the accommodating area 302 can be embedded and fixed by being closely connected to the side.

[0063] The electrochemical energy storage device 4 is a device that stores energy by converting chemical energy and electrical energy into each other through chemical reactions, for example, it can be a lead-acid battery, a sodium-sulfur battery, a flow battery, a lithium-air aluminum-air battery, a sodium-ion battery, a nickel-hydrogen battery, a nickel-chromium battery, a polymer lithium-ion battery, a sodium battery, a fuel cell, a supercapacitor, etc. Preferably, the electrochemical energy storage device 4 can be a battery using solid electrodes and solid electrolytes, referred to as a solid-state battery. The inventors have found that the use of solid-state batteries, due to their high energy density, thinness, and good safety, is particularly suitable for integration into the core layer 3 to form an energy storage wallboard 10, especially the energy storage wallboard 10 as a structural bearing member will bear the load that the structural member should bear, and the solid-state battery with better safety and impact resistance can meet the higher requirements for the safety of the energy storage wallboard. Taking a solid-state battery as an example, the electrochemical energy storage device 4 can be a solid-state battery module or a solid-state battery pack composed of multiple solid-state batteries connected in series, in parallel, in mixed connection and packaged, or it can be a large-volume battery cell. It can be understood that the core layer 3 may have multiple accommodating areas 302, each of which corresponds to a fixedly arranged solid-state battery module or solid-state battery pack. The solid-state battery modules or solid-state battery packs fixedly arranged in different accommodating areas 302 may be electrically connected in series, parallel or mixed.

[0064] The surface of the electrochemical energy storage device 4 is fixedly connected to the accommodation area 302 by an adhesive structure. The process of forming the adhesive structure, for example, can be that the electrochemical energy storage device 4 is packaged to form a battery module or a battery pack, which can be cast, and the casting agent is selected from resins and rubbers with a maximum temperature of no more than 60°C during the curing process, such as polyester polymers, silicone rubber, phenolic resins, epoxy resins, etc. that meet the above conditions, and then embedded in the accommodation area 302 of the core layer 3. It can also be that a layer of glue is sprayed on the surface of the electrochemical energy storage device 4, and then embedded in the accommodation area 302 of the core layer 3, or after the electrochemical energy storage device 4 is embedded in the accommodation area 302 of the core layer 3, the glue is filled between the electrochemical energy storage device 4 and the accommodation area 302. It can be understood that although the above content records that the electrochemical energy storage device 4 and the accommodation area 302 can also be fixed by being closely connected to the side, due to the fluidity of the glue, it can still enter between the two closely attached sides to achieve bonding.

[0065] The specific bonding position can be that the side surface 41 of the electrochemical energy storage device is fixedly connected to the side surface 3021 of the receiving area through the first bonding structure 51; the bottom surface 42 of the electrochemical energy storage device 4 is fixedly connected to the bottom surface 3022 of the receiving area through the second bonding structure 52; and / or the core unit 31 is fixedly connected to the first panel 1 and / or the second panel 2 through the third bonding structure 53. The inventor found that when the side surface 41 of the electrochemical energy storage device is fixedly connected to the side surface 3021 of the receiving area through the first bonding structure 51, even if there is no bonding between the bottom surface 42 of the electrochemical energy storage device and the bottom surface 3022 of the receiving area or the first panel 1 and / or the second panel 2, a good structural strength can be achieved to fully protect the electrochemical energy storage device 4. This effect will be described in detail in the following embodiments. In addition, the bonding structure is generally bonded on the entire surface, so that the processability is better. It can be understood that, on the basis of side bonding, the bonding effect can be further enhanced by connecting the second bonding structure 52 and the third bonding structure 53 through the bottom surface. In addition, the possibility of bonding only on the bottom surface is not excluded. The above-mentioned first bonding structure 51, second bonding structure 52, and third bonding structure 53 can be the same bonding process, such as the glue bonding introduced above. Different words are used here to distinguish different positions. The type of glue can be commercially available aerospace-grade glue, such as 3Mscotch-weld aerospace-grade glue / film, Henkel's Hysol series glue, Araldite aerospace-grade glue, and Loctite Aero aerospace glue, but it is not limited to this. It can be understood that the first bonding structure 51, the second bonding structure 52, and the third bonding structure 53 are actually very thin, and the thickness is much smaller than the thickness of the first panel and the second panel. Figure 3A , Figure 3B In order to show the bonding relationship, the thickness of the bonding structure is deliberately exaggerated.

[0066] refer to FIG. 4A to FIG. 4B As shown, a conductor 6 is provided on the first panel 1 or the second panel 2 of the bottom surface 3022 providing the accommodation area, and the conductor 6 is electrically connected to the electrochemical energy storage device 4. Preferably, the conductor 6 can be in the form of a common wire, and the material can be copper, silver, aluminum and other materials, or other forms and structures. In the embodiment shown in the figure, the conductor 6 is a sheet structure, and its thickness is very thin and almost negligible, so that it is easy to be applied to the interior of the wallboard in the figure. Preferably, it can be a pure nickel sheet, an aluminum-nickel composite sheet, a nickel-plated steel sheet, a nickel-plated copper sheet, a pure copper sheet, and a tin-plated copper sheet. The inventor found that the use of pure nickel sheets, aluminum-nickel composite sheets, nickel-plated steel sheets, nickel-plated copper sheets, pure copper sheets, and tin-plated copper sheets as conductors 6 has the beneficial effect that it is easy to weld with the pole ears 43 of the energy storage element 4, and realizes effective electrical connection between multiple electrochemical energy storage devices 4, and with external electrical appliances, battery management systems (Battery management system, BMS), etc. The size and shape of the nickel sheet are determined according to the pole ear design of the battery cell. Taking the conductor 6 as a pure nickel sheet as an example, the connection between the nickel sheet as the conductor 6 and the pole ear 43 of the energy storage element 4 can be achieved by spot welding, ultrasonic welding, soldering, wiring groove cutting, etc., and the wiring groove is accurately cut out on the panel or core layer to facilitate the arrangement of the nickel sheet. This step can be achieved by a CNC machine tool to ensure the accuracy and consistency of the wiring groove. FIG. 4A to FIG. 4BAs shown, the battery management system 7 can also be integrated in the energy storage wall panel 10, but it is not limited to this, and the BMS can also be set outside the energy storage wall panel 10. The process to be implemented can be, taking the first panel 1 and the second panel 2 as composite panels as an example, the nickel sheet cut into a shape is bonded to the inside of the panel to be welded to the pole ear of the electrochemical energy storage device 4. At the same time, the copper foil is passed through the inside of the hot pressing panel and cut by laser to form a composite panel similar to a PCB circuit board. Electronic components such as the battery control system BMS are welded on the cut circuit. Space for the circuit is cut out on the core layer. Finally, assembly is performed. A lead-out interface is designed on the surface of the structural battery panel to facilitate electrical connection with external devices. In this way, multiple electrochemical energy storage devices 4 can be effectively integrated and electrically connected in the energy storage wall panel 10 of the sandwich structure panel, ensuring the stability and reliability of the battery pack. This design allows the battery pack to flexibly adjust the capacity and voltage output according to actual application requirements while maintaining the compactness and lightweight of the structure. It can be understood that the nickel sheet can also be glued to the composite material panel without glue. For example, in the process of panel manufacturing, the fiber cloth, thermoplastic polymer material particles (or sheets), and conductors are layered in a mold according to the designed order, and are cured by compression molding to produce a panel containing a thermoplastic matrix. Alternatively, the fiber cloth and conductors are layered in a mold according to the designed order, and are cured by resin transfer molding, vacuum bagging, and other methods to produce a panel using a thermosetting matrix. In addition, for the metal first panel 1 or the second panel 2, such as the aluminum alloy panel described above, and the metal core layer 3, such as the aluminum alloy core layer 3 described above, the conductor 6 generally needs to be wrapped with an insulating layer to prevent short circuits.

[0067] like Figure 5 As shown, preferably, the outer surface of the first panel 1 or the second panel 2 in the first direction provides the outer surface of the energy storage wall panel 10, and the photovoltaic panel 8 is arranged on the outer surface. This can further improve the integration of the system. For example, on aviation and aerospace components such as artificial satellites and aircraft, solar energy can be fully utilized for power generation to supplement the electrical energy stored in the energy storage wall panel 10 without the need to additionally arrange solar panels.

[0068] In order to more clearly show the technical effect of the bonding structure of the embodiment of the present application, specific data are provided below.

[0069] like Figure 6As shown, the first panel 1 and the second panel 2 of the energy storage wall panel 10 of the embodiment are 1mm thick glass fiber reinforced epoxy resin panels, the core layer is composed of 10mm thick aramid honeycomb, and the accommodating area 302 of the core layer is a core unit with all the height cut off, located in the middle of the first panel 1 and the second panel 2, and is rectangular, that is, a cuboid in space, with a bottom area of ​​5cm*6cm. A rigid pressure head is set on the first panel 1 to apply force, and a rigid restraint is set on the second panel 2 to play a supporting role.

[0070] In the embodiment, the side surface 41 of the electrochemical energy storage device is fixedly connected to the side surface 3021 of the accommodating area by a first bonding structure 51, while the bottom surface 2 of the electrochemical energy storage device is not bonded, but is only restricted by the first panel 1 and the second panel 2 and does not leave the accommodating space. For example, the two may be in contact or non-contact.

[0071] In the comparative example, the surface of the electrochemical energy storage device is in contact with the receiving area, that is, the side surface 41 of the electrochemical energy storage device and the side surface 3021 of the receiving area are closely embedded and connected surface to surface.

[0072] The mechanical properties of each interface are shown in Table 1, Table 2, Table 3 and Table 4 below.

[0073] Table 1: Mechanical properties of the first panel and the second panel

[0074] Property parameter Property parameter <![CDATA[Elastic modulus E1 (GPa)]]> 40 <![CDATA[Longitudinal compressive strength X c (MPa)]]> 550 <![CDATA[Elastic modulus E2 = E3 (GPa)]]> 8.4 <![CDATA[Transverse tensile strength Y r (MPa)]]> 48 <![CDATA[Poisson's ratio μ 12 = μ 13 > 0.32 <![CDATA[Transverse compressive strength Y c (MPa)]]> 140 <![CDATA[Poisson's ratio μ 23 > 0.39 <![CDATA[Shearing strength S in the spade direction T (MPa)]]> 65 <![CDATA[Longitudinal tensile strength X T (MPa)]]> 860 <![CDATA[Transverse shear strength S c (MPa)]]> 60

[0075] Table 2: Mechanical properties of the connection area of ​​the core layer

[0076]

[0077] Table 3: Mechanical properties of electrochemical energy storage devices

[0078] Cell parameter Elastic modulus E(MPa) 553.96 Poisson's ratio μ 0.01 Failure strain ε 0.02

[0079] Table 4: Mechanical properties of bonding interface

[0080]

[0081] like Figure 7 As shown in the figure, the peak load of the comparative example is not significantly less than that of the example. The peak load of the comparative example is 4.50 kN, while the peak load of the example is 5.03 kN. However, the inventor unexpectedly found that the example can significantly delay the failure. The aging displacement of the comparative example is 23.04 mm, while the example is greatly increased to 41.44 mm. Figure 8As shown, the inventors unexpectedly discovered that the embodiment can significantly improve the energy absorption level. The peak internal stress of the comparative example is 52.1 J, while the peak internal stress of the embodiment is 107.9 J, which is more than twice that of the comparative example.

[0082] like Fig. 9A As shown in FIG. 1 , when the rigid indenter is pressed down from 11.2 mm to 26.4 mm, the interface damage of the electrochemical energy storage device 4 evolves from the edge to the interface damage, and when the structure is damaged, the interface of the battery cell is not completely damaged. Fig. 9B and Fig. 9C By comparison, we can find that Fig. 9C In the comparative example shown, the contact pressure between the edge of the electrochemical energy storage device 4 and the panel is relatively large. Fig. 9B The illustrated embodiment allows the edge of the electrochemical energy storage device 4 to be pressed more evenly without forming a high stress area.

[0083] like Fig. 10A As shown, for the failure of the energy storage wall panel 10, the panel mainly produced collective shear and matrix tensile failure, and the failure zone developed laterally from the center of the compressed side of the panel to the edge of the panel. At the same time, the damage was mainly concentrated in the first panel. This was because the pressure head directly contacted the first panel for compression loading, which caused the early failure of the first panel.

[0084] And will Fig. 10B and Fig. 10C By contrast, when the rigid indenter is pressed down from 0.1mm to 0.33mm, it can be found that under the same stress scale, the electrochemical energy storage device 4 has a greater stress in the connection area than the core unit. This is because the rigidity of the battery cell as a metal material is higher than that of the core unit. Fig. 10C The stress value of the electrochemical energy storage device 4 in the embodiment shown is uniform, and Fig. 10B The electrochemical energy storage device 4 of the comparative example shown has an obvious high stress area. It can be found that although the embodiment and the comparative example are physically fixed, the bonding fixation is compared with the embedding with only physical surface contact. The bonding structure obviously integrates the electrochemical energy storage device 4 set in the core layer and the connection area 301 into a stress-bearing whole, so that the uniformity of the stress value of the embodiment is significantly higher than that of the comparative example.

[0085] In summary, the beneficial effects of the energy storage wall panels and electrical equipment including the same introduced in the above embodiments include, but are not limited to, the structure that the surface of the electrochemical energy storage device is fixedly connected to the accommodating area through an adhesive structure, so as to realize the integration of the two functions of energy storage and structural support, while taking into account the lightweight and structural reliability of the energy storage wall panels. Specifically, through the adhesive structure, it is not necessary to use screws and other connectors in the energy storage wall panels, which reduces the weight of the wall panels, achieves a lightweight effect, and also reduces the stress concentration at the openings and screw-hole connections. And the inventors found that by comparing the adhesive structure with the non-adhesive physical contact limiting structure, the adhesive structure achieves a significant delay in failure and a significant improvement in energy absorption, and the adhesive force connects the electrochemical energy storage device and the core layer to be stressed as a whole. The electrical equipment using the energy storage wall panels has the advantages of compact structure and lightweight.

[0086] Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application, and any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, any modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application shall fall within the scope of protection defined by the claims of the present application.

Claims

1. An energy storage wall panel (10), characterized in that: include: A first panel (1); A second panel (2) is arranged relative to the first panel (1) in a first direction; A core layer (3) is located between the first panel (1) and the second panel (2) in a first direction, the core layer (3) comprises a plurality of core units (31) arranged adjacent to each other, the core layer (3) comprises a connection area (301) and a receiving area (302), the core units (31) constituting the connection area (301) are respectively fixedly connected to the first panel (1) and the second panel (2) at two ends in the first direction, the core units (31) constituting the receiving area (302) are at least partially cut off at a height in the first direction, the receiving area (302) comprises a side wall of the core unit (31) of the adjacent connection area (301) providing a side surface (3021) of the receiving area, and the first panel (1) and the second panel (2) provide at least one bottom surface (3022) of the receiving area; An electrochemical energy storage device (4) is arranged in the accommodation area (302), and the shape of the accommodation area (302) matches the surface of the electrochemical energy storage device (4); Wherein, the surface of the electrochemical energy storage device is fixedly connected to the containing area (302) via an adhesive structure.

2. The energy storage wall panel (10) according to claim 1, characterized in that: The side surface (41) of the electrochemical energy storage device and the side surface (3021) of the accommodating area are fixedly connected via a first adhesive structure (51).

3. The energy storage wall panel (10) according to claim 2, characterized in that: The bottom surface (42) of the electrochemical energy storage device (4) is fixedly connected to the bottom surface (3022) of the accommodating area via a second adhesive structure (52); and / or the core unit (31) is fixedly connected to the first panel (1) and / or the second panel (2) via a third adhesive structure (53).

4. The energy storage wall panel (10) according to claim 1, characterized in that: The first panel (1) and / or the second panel (2) are composite material panels, and a conductor (6) is provided on the bottom surface (3022) of the first panel (1) or the second panel (2) providing the accommodating area, wherein the conductor (6) is electrically connected to the electrochemical energy storage device (4), and the conductor (6) can be bonded to the composite material panel without glue; or, the first panel (1) and / or the second panel (2) are aluminum alloy panels.

5. The energy storage wall panel (10) according to claim 4, characterized in that: The conductor (6) is a pure nickel sheet, or an aluminum-nickel composite sheet, or a nickel-plated steel sheet, or a nickel-plated copper sheet, or a pure copper sheet, or a tin-plated copper sheet.

6. The energy storage wall panel (10) according to claim 4, characterized in that: The first panel (1) or the second panel (2) is integrated with a battery management system for controlling the electrochemical energy storage device (4).

7. The energy storage wall panel (10) according to claim 1, characterized in that: The electrochemical energy storage device (4) is a solid-state battery.

8. The energy storage wall panel (10) according to claim 1, characterized in that: The outer surface of the first panel (1) or the second panel (2) in the first direction provides the outer surface of the energy storage wall panel (10), and a photovoltaic panel (8) is arranged on the outer surface.

9. An electrical device (100), characterized in that: It comprises the energy storage wall panel (10) as described in any one of claims 1 to 8.

10. The electrical equipment (100) according to claim 9, characterized in that: The electrical equipment includes artificial satellites, space buildings, space stations, and aircraft; the energy storage wall panels (10) provide at least part of the wall panels of the artificial satellites, at least part of the fuselage and wings of the aircraft, at least part of the structural panels of the space buildings, and at least part of the wall panels of the space station.

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