Battery device and electric equipment

Abstract

The embodiment of the invention discloses a battery device and electric equipment. The battery device comprises a box body; the plurality of single batteries are arranged along a first direction, and the plurality of single batteries are accommodated in the box body; the beam assembly comprises stress plates oppositely arranged in the first direction and a supporting piece arranged between the stress plates and connected with the stress plates, the stress plates and the supporting piece define a containing cavity, the stress plates resist expansive force generated by the battery monomers, and the supporting piece is arranged between the stress plates. The beam assembly is arranged among the plurality of battery monomers in a penetrating manner, so that a first battery monomer in the plurality of battery monomers is accommodated in the accommodating cavity, and a second battery monomer in the plurality of battery monomers is positioned outside the accommodating cavity. According to the battery device and the electric equipment provided by the embodiment of the invention, the internal expansion force of the battery device can be reasonably reduced, and the internal space use of the battery device is optimized.

Description

Technical Field

[0001] This application relates to the field of battery devices, and more specifically, to a battery device and an electrical appliance. Background Technology

[0002] The application scope of battery devices is gradually expanding, and there are higher requirements for the energy density and range of battery devices. Therefore, multiple battery cells are connected in series, parallel or mixed connection in battery devices to expand their capacity or power.

[0003] However, when multiple battery cells undergo charge-discharge cycles, they may experience significant volume expansion, which can affect the structural stability of the battery casing and potentially weaken its sealing performance.

[0004] Therefore, how to reasonably reduce the excessive expansion force inside the battery device has become an urgent problem to be solved. Summary of the Invention

[0005] This application provides a battery device and an electrical appliance that can reasonably reduce excessive expansion force inside the battery device and improve the utilization rate of the internal space of the battery device.

[0006] In a first aspect, a battery device is provided, comprising: a housing; a plurality of battery cells arranged along a first direction and housed within the housing; a beam assembly including load-bearing plates disposed opposite each other along the first direction, and a support member disposed between and connected to the load-bearing plates, the load-bearing plates and the support member forming a receiving cavity, the load-bearing plates being used to resist the expansion force generated by the plurality of battery cells; the beam assembly being interposed between the plurality of battery cells such that a first battery cell among the plurality of battery cells is housed within the receiving cavity, and a second battery cell among the plurality of battery cells is located outside the receiving cavity.

[0007] The battery device provided in this application embodiment interrupts the continuous arrangement of battery cells through beam assembly to resist the expansion force of battery cells located on both sides of the beam assembly, and reasonably reduces the excessive expansion force inside the battery device; at the same time, the internal cavity of the beam assembly can accommodate some battery cells, greatly improving the utilization rate of the internal space of the battery device.

[0008] In some embodiments, the two sides of the force-bearing plate are respectively attached to the first battery cell or the second battery cell.

[0009] The battery device provided in this application embodiment can effectively resist the expansion force generated by the battery cell by setting a force-bearing plate to fit with the battery cell, while improving the utilization rate of the internal space of the battery device.

[0010] In some embodiments, the material of the load-bearing plate is an insulating rigid material.

[0011] In some embodiments, the insulating rigid material is at least one of the following materials: a plastic composite material with a polyphenylene sulfide (PPS) matrix or a polyphthalamide (PPA) matrix.

[0012] The battery device provided in this application embodiment, by setting the material of the force plate to be an insulating rigid material, can effectively resist the expansion force generated by the battery cell and reasonably reduce the expansion force inside the battery device.

[0013] In some embodiments, the thickness of the load-bearing plate ranges from [0.5 mm to 2 mm].

[0014] The battery device provided in this application embodiment, by setting the thickness of the load-bearing plate, enables the beam assembly to meet rigidity requirements while also effectively utilizing the internal space of the battery device.

[0015] In some embodiments, the support member is perpendicularly connected to the force-bearing plate.

[0016] The battery device provided in this application embodiment is vertically connected to the load-bearing plate through a support member in the beam assembly, which effectively improves the rigidity of the beam assembly.

[0017] In some embodiments, the beam assembly further includes a first partition located between the opposing load-bearing plates, the first partition being parallel to the load-bearing plates and connected to the support member.

[0018] The battery device provided in this application embodiment effectively improves the rigidity of the beam assembly by setting a first partition in the beam assembly.

[0019] In some embodiments, the support member is a support plate disposed opposite to the support plate along a second direction, the end of the support plate being connected to the end of the force-bearing plate, wherein the second direction is perpendicular to the first direction.

[0020] In some embodiments, the beam assembly further includes a second partition, which is located between the opposing support plates, is parallel to the support plates and connected to the load-bearing plate; the first partition and the second partition divide the receiving cavity into a plurality of sub-cavities.

[0021] The battery device provided in this application embodiment effectively improves the rigidity of the beam assembly by setting a second partition in the beam assembly.

[0022] In some embodiments, the beam assembly further includes a base plate, and the bottom of the housing is provided with a recessed platform that is recessed away from the plurality of battery cells. The base plate is connected to the load-bearing plate and the support member respectively, and the base plate is housed within the recessed platform.

[0023] In some embodiments, the recess height of the recessed platform is the same as the thickness of the base plate.

[0024] The battery device provided in this application embodiment has a base plate in the beam assembly and a corresponding recessed platform at the bottom of the box, so that the top and bottom of the battery cell in the housing cavity are on the same horizontal plane as the top and height of other battery cells, which facilitates the assembly of the battery cells.

[0025] In some embodiments, there are multiple beam assemblies, and the multiple beam assemblies are spaced apart along the first direction.

[0026] In some embodiments, the beam assembly is located at the ends and / or middle of the plurality of battery cells.

[0027] The battery device provided in this application embodiment, by setting multiple spaced beam assemblies, blocks the continuous arrangement of battery cells, thereby resisting the expansion force of battery cells located on both sides of the beam assembly and reasonably reducing the excessive expansion force inside the battery device.

[0028] In some embodiments, the bottom of the beam assembly is glued to the box body.

[0029] The battery device provided in this application embodiment uses adhesive to connect the bottom of the beam assembly to the bottom of the housing to fix the beam assembly.

[0030] In some embodiments, the side of the force-bearing plate near the receiving cavity is glued to the battery cell.

[0031] The battery device provided in this application embodiment uses adhesive to connect the load-bearing plate and the battery cell to fix the beam assembly.

[0032] In some embodiments, the battery device further includes at least two expansion beams connected to the bottom of the housing, with the battery cells and the beam assembly housed between two adjacent expansion beams.

[0033] The battery device provided in this application embodiment provides an expansion beam at the end of multiple battery cells to constrain the expansion of the battery cells at the end of the battery device and resist the expansion force of the battery cells.

[0034] In a second aspect, an electrical device is provided, the electrical device including a battery device as described in the first aspect and any embodiment of the first aspect, the battery device being used to supply power to the electrical device.

[0035] Thirdly, an energy storage device is provided, which includes a battery device as described in the first aspect and any embodiment of the first aspect, the battery device being used to supply power to the energy storage device. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a vehicle according to one embodiment of this application;

[0037] Figure 2 A schematic diagram of the structure of a battery device according to an embodiment of this application is shown;

[0038] Figure 3 A structural schematic diagram of a beam assembly according to an embodiment of this application is shown;

[0039] Figure 4 A structural schematic diagram of a beam assembly according to an embodiment of this application is shown;

[0040] Figure 5 A structural schematic diagram of a beam assembly according to an embodiment of this application is shown;

[0041] Figure 6 A structural schematic diagram of a beam assembly according to an embodiment of this application is shown;

[0042] Figure 7 A structural schematic diagram of a beam assembly according to an embodiment of this application is shown;

[0043] Figure 8 A schematic diagram of the structure of a battery device according to an embodiment of this application is shown;

[0044] Figure 9 An exploded structural diagram of a battery device according to an embodiment of this application is shown;

[0045] Figure 10 A top view of a partial structure of the battery device in an embodiment of this application is shown;

[0046] Figure 11 A cross-sectional schematic diagram of a partial structure of the battery device in an embodiment of this application is shown;

[0047] Figure 12 A cross-sectional schematic diagram of a partial structure of the battery device in an embodiment of this application is shown;

[0048] Figure 13 A partial structural schematic diagram of a battery device according to an embodiment of this application is shown.

[0049] The accompanying drawings are not drawn to scale.

[0050] Figure label:

[0051] 1-Vehicle; 10-Battery unit; 20-Battery cell; 30-Controller; 40-Motor; 11-Box; 111-First box section; 112-Second box section; 50-Beam assembly; 51-Resistant plate; 511-First stress plate; 512-Second stress plate; 52-Support member; 521-Support plate; 53-First partition; 54-Bottom plate; 55-Receiving cavity; 56-Second partition; 1121-Sunk platform; 60-Expansion beam; 201-First battery cell; 202-Second battery cell. Detailed Implementation

[0052] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0054] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application 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 description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0055] In this application, the reference to "embodiment" means that a specific 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 mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0056] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0057] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0058] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0059] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0060] In this embodiment of the application, the battery cell can be a secondary battery device, which refers to a battery cell that can be used again after being discharged by recharging to activate the active materials.

[0061] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0062] In some implementations, the battery cell in this application embodiment can be a metal battery. Specifically, the metal battery may include lithium metal secondary batteries, sodium metal batteries, or magnesium metal batteries, etc. This application embodiment does not limit this.

[0063] 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, prevents short circuits while allowing active ions to pass through.

[0064] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0065] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0066] As an example, the positive electrode current collector can be a metal foil, a foamed metal, or a composite current collector. For example, as a metal foil, it can be silver-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium, etc. Foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. Composite current collectors can include a polymer material base layer and a metal layer. Composite current collectors can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0067] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for battery devices may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium manganese iron phosphate, and lithium manganese iron phosphate and carbon composites.

[0068] In some embodiments, the negative electrode may be a negative electrode sheet, which may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0069] As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0070] As an example, the negative electrode current collector can be a metal foil, a foamed metal, or a composite current collector. For example, as a metal foil, it can be silver-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium, etc. Composite current collectors can include a polymer material base layer and a metal layer. Foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. Composite current collectors can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0071] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0072] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0073] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene and polyvinylidene fluoride, and ceramic.

[0074] 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.

[0075] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0076] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0077] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc. The housing includes a shell and end caps.

[0078] The battery device mentioned in the embodiments of this application may include a single physical module containing one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, parallel, or mixed via a busbar. Mixed connection refers to a combination of series and parallel connections.

[0079] In some embodiments, the battery device can be a battery pack, which includes a housing and individual battery cells, with the individual battery cells or battery modules housed within the housing. For example, multiple individual battery cells can first be connected in series, parallel, or a combination of these connections to form a battery module, and then multiple battery modules can be connected in series, parallel, or a combination of these connections to form the battery device. That is, multiple individual battery cells can directly form the battery device, or they can first be connected in series to form a battery module, and then the battery modules can be connected in series to form the battery device.

[0080] 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.

[0081] In some embodiments, the battery device may be located within an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0082] The issue of battery device volume expansion is particularly prominent in high-energy-density battery devices. This expansion can be caused by a variety of factors, including internal chemical reactions, temperature changes, and mechanical stress. The expansion of the battery device's volume not only affects its physical structure but may also damage internal components, thereby impacting the battery's performance and lifespan, and potentially even causing safety issues.

[0083] To address this, existing battery housings incorporate restraint components to constrain the expansion of the entire battery pack. However, this design can lead to excessive restriction on individual battery cells, resulting in insufficient expansion force and affecting the overall pack stability. Furthermore, the connection between the restraint components and the housing requires significant space, as does the space between adjacent restraint components, thus reducing the effective utilization of the internal space of the housing.

[0084] Therefore, this application provides a battery device and an electrical appliance that can solve the above-mentioned problems. The battery device of this application includes a housing, multiple battery cells, and a beam assembly, with the multiple battery cells and the beam assembly housed within the housing. The multiple battery cells are arranged along a first direction, which can be the thickness direction of the battery cells. The beam assembly is interposed between the continuously arranged battery cells. The beam assembly includes two force-bearing plates arranged opposite each other along the first direction, and a support member connected to the two force-bearing plates. The force-bearing plates and the support member enclose a receiving cavity, within which some of the multiple battery cells can be disposed.

[0085] A large expansion force accumulates between multiple continuously arranged battery cells. In this embodiment, the continuous arrangement of battery cells is interrupted by a beam assembly to resist the expansion force of the battery cells located on both sides of the beam assembly. This avoids insufficient expansion force required by the battery cells due to overall constraint, and reasonably reduces the excessive expansion force inside the battery device. At the same time, the internal cavity of the beam assembly can accommodate some battery cells, which greatly improves the utilization rate of the internal space of the battery device.

[0086] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices.

[0087] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0088] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0089] For example, such as Figure 1 The diagram shown is a structural schematic of a vehicle 1 according to one embodiment of this application. Vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A motor 40, a controller 30, and a battery device 10 can be installed inside vehicle 1. The controller 30 controls the battery device 10 to supply power to the motor 40. For example, the battery device 10 can be installed at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1. For example, the battery device 10 can serve as the operating power source for vehicle 1, for example, to meet the electrical system requirements of vehicle 1, such as for starting, navigation, and operation. In another embodiment of this application, the battery device 10 can not only serve as the operating power source for vehicle 1, but also as the driving power source for vehicle 1, replacing or partially replacing gasoline or natural gas to provide driving power for vehicle 1.

[0090] Figure 2 A schematic diagram of the structure of the battery device 10 according to an embodiment of this application is shown; Figure 3 A structural schematic diagram of a beam assembly 50 according to an embodiment of this application is shown; Figure 4 A structural schematic diagram of a beam assembly 50 according to an embodiment of this application is shown; Figure 5 A structural schematic diagram of a beam assembly 50 according to an embodiment of this application is shown; Figure 6 A structural schematic diagram of a beam assembly 50 according to an embodiment of this application is shown; Figure 7 A structural schematic diagram of a beam assembly 50 according to an embodiment of this application is shown; Figure 8 A schematic diagram of the structure of the battery device 10 according to an embodiment of this application is shown; Figure 9 An exploded view of the battery device 10 according to an embodiment of this application is shown. Figure 10 A top view of a partial structure of the battery device 10 in an embodiment of this application is shown;

[0091] Figure 11 A cross-sectional schematic diagram of a partial structure of the battery device 10 in an embodiment of this application is shown; Figure 12 A cross-sectional schematic diagram of a partial structure of the battery device 10 in an embodiment of this application is shown; Figure 13 A partial structural schematic diagram of the battery device 10 according to an embodiment of this application is shown.

[0092] like Figure 2 As shown, the battery device 10 of this application embodiment may include a plurality of battery cells 20 to meet different power usage requirements. The shape of the battery cell 20 in this application embodiment can be set according to actual application. For example, the battery cell 20 can be as follows: Figure 2 The cuboid shown can also be different. Figure 2 The embodiments shown are cylindrical or other shapes, but are not limited to these.

[0093] It should be understood that, such as Figure 2 As shown, the battery device 10 of this embodiment may further include a housing 11, which can be used to accommodate multiple battery cells 20. The housing 11 of this embodiment has a hollow interior, and the multiple battery cells 20 are accommodated within the housing 11. The housing 11 may include two parts, referred to herein as a first housing portion 111 and a second housing portion 112, which are fastened together. The shapes of the first housing portion 111 and the second housing portion 112 can be determined according to the shape of the components housed inside, for example, according to the shape of the combination of the multiple battery cells 20 housed inside. At least one of the first housing portion 111 and the second housing portion 112 has an opening. For example, as... Figure 2As shown, the first housing portion 111 and the second housing portion 112 can both be hollow cuboids with one open side each. The openings of the first housing portion 111 and the second housing portion 112 are opposite to each other, and the first housing portion 111 and the second housing portion 112 are interlocked to form a housing 11 with a closed chamber, which can be used to accommodate multiple battery cells 20. The multiple battery cells 20 are connected in parallel, series, or mixed and placed inside the housing 11 formed by the interlocking of the first housing portion 111 and the second housing portion 112.

[0094] For example, unlike Figure 2 As shown, either the first housing portion 111 or the second housing portion 112 may have only one hollow cuboid with an opening, while the other is plate-shaped to cover the opening. Taking the second housing portion 112 as a hollow cuboid with one opening and the first housing portion 111 as a plate-shaped example, then the first housing portion 111 covers the opening of the second housing portion 112 to form a housing 11 with a closed chamber, which can be used to accommodate multiple battery cells 20.

[0095] In some embodiments, the battery device 10 may further include other components. For example, the battery device 10 may further include a busbar component, which can be used to realize electrical connections between multiple battery cells 20, such as in parallel, series, or mixed connections. Specifically, the busbar component can realize electrical connections between battery cells 20 by connecting to the electrode terminals of the battery cells 20; or, the busbar component can also realize electrical connections between battery cells 20 by connecting to other components of the battery cells 20. The busbar component can be fixed to corresponding components of the battery cells 20 by welding, for example, by welding to electrode terminals, sealing structures, or housings, etc., and the embodiments of this application are not limited thereto.

[0096] like Figures 3 to 7 As shown, the battery device 10 provided in this embodiment further includes a beam assembly 50, which includes a pair of force-bearing plates 51 disposed opposite to each other along a first direction, namely a first force-bearing plate 511 and a second force-bearing plate 512. The beam assembly 50 also includes a support member 52 disposed between and connected to the first force-bearing plate 511 and the second force-bearing plate 512, which supports the first force-bearing plate 511 and the second force-bearing plate 512 to form a stable rigid structure. A receiving cavity 55 is formed between the first force-bearing plate 511, the second force-bearing plate 512, and the support member 52. The first direction can be... Figure 7 The X-axis direction is shown.

[0097] In some embodiments, the material of the load-bearing plate 51 is an insulating rigid material, such as a plastic composite material like polyphenylene sulfide (PPS) or polyphthalamide (PPA), but the embodiments of this application are not limited to this.

[0098] In some embodiments, the material of the support member 52 is the same as that of the force plate 51, which is also an insulating rigid material. This embodiment of the application does not specifically limit this.

[0099] In some embodiments, the support member 52 is vertically connected to the load-bearing plate 51, which can enhance the rigidity of the beam assembly 50.

[0100] In some embodiments, such as Figures 3 to 7 As shown, the accommodating cavity 55 can be a semi-open type with three sides enclosed, or a fully closed type with four sides enclosed. This embodiment of the application does not specifically limit this.

[0101] In some embodiments, the beam assembly 50 further includes a first partition 53 and / or a second partition 56. The first partition 53 is located between adjacent battery cells 20 (not shown) in a first direction and is connected to the support member 52. The second partition 56 is located between adjacent battery cells 20 in a second direction and is connected to the load-bearing plate 51. The second direction is perpendicular to the first direction and can be... Figure 7 The Y-axis direction is shown.

[0102] Combination Figures 3 to 7 As shown, the beam assembly 50 provided in this application embodiment has various structural forms.

[0103] For example, Figure 3 As shown, the support member 52 is connected to the middle area of ​​the first force plate 511 and the second force plate 512 respectively, so that the cross-sectional shape of the beam assembly 50 is I-shaped and the receiving cavity 55 is semi-open. This cross-sectional design enables the beam assembly 50 to have a large section modulus, which helps to improve its bending resistance and thus increase rigidity.

[0104] For example, Figure 4 As shown, the support member 52 is a pair of support plates 521 arranged opposite each other. The ends of the support plates 521 are connected to the middle of the first force plate 511 and the second force plate 512. The first force plate 511, the second force plate 512 and the support plate 521 enclose a receiving cavity 55 (not shown in the figure). The receiving cavity 55 is semi-open and / or fully closed.

[0105] For example, Figure 5 As shown, the support member 52 is a pair of support plates 521 arranged opposite to each other. The ends of the support plates 521 are connected to the ends of the first force plate 511 and the second force plate 512. A plurality of first partitions 53 are disposed between adjacent battery cells 20 (not shown in the figure) in the first direction and are connected to the support plates 521. The plurality of first partitions 53 divide the receiving cavity 55 into a plurality of sub-cavities.

[0106] For example, Figure 6As shown, the support member 52 is a pair of support plates 521 arranged opposite each other. The ends of the support plates 521 are connected to the ends of the first force plate 511 and the second force plate 512. The second partition 56 is arranged between the opposite support plates 521. The second partition is parallel to the support plates 521 and connected to the force plate 51. The second partition divides the receiving cavity 55 into multiple sub-cavities.

[0107] For example, Figure 7 As shown, the support member 52 consists of a pair of opposing support plates 521. The ends of the support plates 521 are connected to the ends of the first force-bearing plate 511 and the second force-bearing plate 512. Multiple first partitions 53 are disposed between adjacent battery cells 20 (not shown) in the first direction and connected to the support plates 521. Second partitions 56 are located between the opposing support plates 521, are parallel to the support plates 521, and are connected to the force-bearing plate 51. The first partitions 53 and second partitions 56 divide the receiving cavity 55 into multiple sub-cavities. Each sub-cavity can accommodate one or more first battery cells 201 (…). Figure 9 (As shown in the figure), this application does not specifically limit the embodiments thereof.

[0108] like Figures 8 to 11 As shown, the battery device 10 provided in this embodiment includes a housing 11, battery cells 20, and a beam assembly 50. The battery cells 20 are arranged along a first direction, and the beam assembly 50 is interposed between multiple battery cells 20 continuously arranged along the first direction to block the multiple battery cells 20. One or more first battery cells 201 among the multiple battery cells 20 can be accommodated within a receiving cavity 55 of the beam assembly 50, and one or more second battery cells 202 among the multiple battery cells 20 are located outside the receiving cavity 55. The sides of the first force-bearing plate 511 and the second force-bearing plate 512 of the beam assembly 50 are respectively attached to the first battery cell 201 or the second battery cell 202. The force-bearing plate 51 is used to resist the expansion force generated by the battery cells 20, generating a resistance force away from the receiving cavity 55. The first direction can be the thickness direction of the battery cells 20, for example, the first direction is... Figure 8 The X-axis direction in the diagram.

[0109] In this embodiment, the beam assembly 50 is interspersed among the continuously arranged battery cells 20. This can be understood as the beam assembly 50 being located in the middle region of the column formed by the battery cells 20 in the first direction. The continuous arrangement of multiple battery devices 10 can easily accumulate large expansion forces. The beam assembly 50, located in the middle region, can block these large expansion forces, distributing the battery cells 20 on both sides of the beam assembly 50 and within the receiving cavity 55 of the beam assembly 50, thus preventing the accumulation of large expansion forces. The beam assembly 50 provided in this embodiment can also be located in the end region of the battery device 10, with the first battery cell 201 located on one side of the beam assembly 50, so that the end region of the battery cell 20 can also be rigidly constrained, reducing the expansion force inside the battery device 10. The beam assembly 50 provided in this embodiment can also be located in both the end region and the middle region of the battery device 10; this embodiment is not limited to this.

[0110] It should be noted that when the battery cell 20 expands and deforms, the expansion deformation of the large surface of the battery cell 20 is greater than that of other surfaces, that is, the expansion deformation of the surface of the battery cell 20 along the first direction is greater than that of other directions.

[0111] Large expansion forces are easily generated between continuously arranged battery cells 20. The beam assembly 50, which is interspersed between the continuously arranged battery cells 20, is rigid and does not easily deform, so it can effectively limit the expansion of the battery cells 20 and provide greater resistance when the battery cells 20 expand. The direction of this resistance can directly oppose the direction of the expansion force of the battery cells 20, that is, the X-axis direction, thereby preventing the battery device 10 from deforming and becoming unstable internally.

[0112] In some embodiments, the material of the first partition 53 or the second partition 56 may be the same as the material of the load-bearing plate 51, which is an insulating rigid material. For example, the insulating rigid material is one or more of plastic composite materials such as polyphenylene sulfide (PPS) and polyphthalamide (PPA), but the embodiments of this application are not limited to this.

[0113] In some embodiments, the thickness of the first load-bearing plate 511, the second load-bearing plate 512, the support member 52, the first partition 53, or the second partition 56 ranges from [0.5mm to 2mm], which can meet the rigidity requirements of the beam assembly 50 and also leave enough space in the housing 11 to accommodate more battery cells 20. For example, the thickness of the first load-bearing plate 511, the second load-bearing plate 512, the support member 52, the first partition 53, or the second partition 56 is set to 0.5mm, 0.8mm, 1mm, 1.5mm, 1.8mm, or 2mm, and this embodiment does not specifically limit this.

[0114] In some embodiments, the height of the first force plate 511, the second force plate 512, the support member 52, the first partition 53 or the second partition 56 along the Z-axis may be less than or equal to the height of the battery cell 20, but the embodiments of this application are not limited thereto.

[0115] In some embodiments, the bottom of the beam assembly 50 and the bottom of the housing 11 are connected by adhesive. Here, adhesive connection means that structural adhesive can be used to connect and fix the battery cell 20, the beam assembly 50 and the housing 11, or sealant can be used to improve the sealing performance of the battery device 10, prevent the intrusion of moisture and impurities, and at the same time play a certain role in fixing.

[0116] In some embodiments, the first force plate 511, the second force plate 512, the support member 52, the first partition 53 or the second partition 56 may be glued to the battery cells 20 in the receiving cavity 55 to fix the beam assembly 50.

[0117] In some embodiments, the force-bearing plate 51 is a honeycomb plate, that is, the force-bearing plate 51 has multiple spaces inside for buffering, or the force-bearing plate 51 has multiple through holes through itself, the axis of which is perpendicular to the first direction. Through the arrangement of the internal structure of the force-bearing plate 51, it is possible to buffer and block large expansion forces, thereby reducing the expansion force inside the battery device 10.

[0118] In some embodiments, such as Figure 12 As shown, the beam assembly 50 also includes a base plate 54, which is connected to the load-bearing plate 51 and the support member 52 respectively. The bottom of the box body 11 can be provided with a recessed platform 1121 that is recessed in the direction away from the battery cell 20. The base plate 54 is housed in the recessed platform 1121. The recessed height of the platform 1121 can be consistent with the thickness of the base plate 54, so that the top and bottom of the battery cell 20 in the receiving cavity 55 are on the same horizontal plane as the top and height of other battery cells 20, which facilitates the assembly of the battery cells 20.

[0119] In some embodiments, the components of the beam assembly 50 may be integrally formed or assembled separately, and this application embodiment does not specifically limit this.

[0120] In some embodiments, there are multiple beam assemblies 50, which are arranged at intervals along a first direction. The interval arrangement can be understood as the multiple beam assemblies 50 being uniformly interspersed between continuously arranged battery cells 20 along the first direction, or it can be understood as the multiple beam assemblies 50 being interspersed along the first direction at locations where the expansion force of the continuously arranged battery cells 20 is greater.

[0121] In some embodiments, such as Figure 13As shown, the battery device 10 also includes at least two expansion beams 60, which are connected to the bottom of the housing 11. The battery cell 20 and the beam assembly 50 are housed between two adjacent expansion beams 60. The expansion beams 60 are rigid and can constrain the expansion of the battery cell 20 at the end of the battery device 10, resisting the expansion force of the battery cell 20.

[0122] In some embodiments, a heat insulation plate may be provided between adjacent battery cells 20 among the plurality of battery cells 20 to prevent overheating between battery cells 20, which helps to maintain the optimal operating temperature of the battery device 10 and extend the life of the battery device 10. This application embodiment does not specifically limit this.

[0123] This application embodiment also provides a battery device 10, including a housing 11, battery cells 20, and a beam assembly 50. The battery cells 20 are arranged along a first direction, and the beam assembly 50 is interposed between a plurality of battery cells 20 arranged continuously along the first direction to block the plurality of battery cells 20. The beam assembly 50 includes at least one force-bearing plate 51, which is rigid to resist the expansion force transmitted by the battery cells 20 on both sides. In some embodiments, the force-bearing plate 51 is a honeycomb plate, that is, the force-bearing plate 51 has a plurality of buffer spaces inside, or the force-bearing plate 51 has a plurality of through holes through itself, the axis of which is perpendicular to the first direction.

[0124] 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 (11); Multiple battery cells (20) are arranged along a first direction and housed within the housing (11); The beam assembly (50) includes a force-bearing plate (51) disposed opposite to each other along the first direction, and a support member (52) disposed between the force-bearing plates (51) and connected to the force-bearing plates (51). The force-bearing plates (51) and the support member (52) enclose a receiving cavity (55). The force-bearing plates (51) are used to resist the expansion force generated by the plurality of battery cells (20). The beam assembly (50) is interposed between the plurality of battery cells (20) such that the first battery cell (201) of the plurality of battery cells (20) is housed in the receiving cavity (55) and the second battery cell (202) of the plurality of battery cells (20) is located outside the receiving cavity (55).

2. The battery device according to claim 1, characterized in that, The two sides of the force-bearing plate (51) are respectively attached to the first battery cell (201) or the second battery cell (202).

3. The battery device according to claim 1 or 2, characterized in that, The material of the load-bearing plate (51) is an insulating rigid material.

4. The battery device according to claim 3, characterized in that, The insulating rigid material is at least one of the following materials: a plastic composite material with polyphenylene sulfide (PPS) matrix or polyphthalamide (PPA) matrix.

5. The battery device according to any one of claims 1 to 4, characterized in that, The thickness of the load-bearing plate (51) ranges from 0.5 mm to 2 mm.

6. The battery device according to any one of claims 1 to 5, characterized in that, The support member (52) is perpendicularly connected to the force-bearing plate (51).

7. The battery device according to any one of claims 1 to 5, characterized in that, The beam assembly (50) further includes a first partition (53) located between the opposing force plates (51), the first partition (53) being parallel to the force plates (51) and connected to the support member (52).

8. The battery device according to claim 7, characterized in that, The support member (52) includes a support plate (521) disposed opposite to the support plate (521) along a second direction, the end of the support plate (521) being connected to the end of the force-bearing plate (51), wherein the second direction is perpendicular to the first direction.

9. The battery device according to claim 8, characterized in that, The beam assembly (50) further includes a second partition (56) located between the opposing support plates (521), the second partition (56) being parallel to the support plates (521) and connected to the load-bearing plate (51); The first partition (53) and the second partition (56) divide the receiving cavity (55) into a plurality of sub-cavities.

10. The battery device according to claim 9, characterized in that, One or more of the first battery cells (201) are housed within the sub-cavity.

11. The battery device according to any one of claims 1 to 10, characterized in that, The bottom of the housing (11) is provided with a recessed platform (1121) that is recessed away from the plurality of battery cells (20). The beam assembly (50) also includes a base plate (54), which is connected to the force plate (51) and the support member (52) respectively. The base plate (54) is housed in the recessed platform (1121).

12. The battery device according to claim 11, characterized in that, The recessed depth of the recessed platform (1121) is the same as the thickness of the base plate (54).

13. The battery device according to any one of claims 1 to 12, characterized in that, There are multiple beam assemblies (50), and the multiple beam assemblies (50) are arranged at intervals along the first direction.

14. The battery device according to any one of claims 1 to 13, characterized in that, The beam assembly (50) is located at the ends and / or middle of the plurality of battery cells (20).

15. The battery device according to any one of claims 1 to 14, characterized in that, The bottom of the beam assembly (50) is glued to the box body (11).

16. The battery device according to any one of claims 1 to 15, characterized in that, The side of the force-bearing plate (51) near the receiving cavity (55) is glued to the battery cell (20).

17. The battery device according to any one of claims 1 to 16, characterized in that, The battery also includes at least two expansion beams (60) connected to the bottom of the housing (11), and the plurality of battery cells (20) and the beam assembly (50) are housed between two adjacent expansion beams (60).

18. An electrical appliance, characterized in that, The battery device includes any one of claims 1 to 17, the battery device being used to supply power to the electrical device.

Images