Battery device and electric appliance

Abstract

The application provides a battery device and a power utilization device. The battery device comprises: a box body having a containing space; a plurality of battery cell assemblies contained in the containing space, the plurality of battery cell assemblies being arranged along a first direction, each battery cell assembly comprising a plurality of battery cells arranged along a second direction; and an end plate contained in the containing space and abutting against at least one end of the plurality of battery cell assemblies along the second direction, the end plate comprising a plurality of support beams extending along a third direction and arranged along the first direction. The bottom plate comprises a plurality of first through holes arranged along the first direction, and the plurality of support beams respectively pass through the plurality of first through holes and are connected with the bottom plate. The application is beneficial to improving the use performance of the battery device.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In battery technology, the structural and mechanical properties of battery devices are crucial, directly affecting their safety, reliability, and lifespan. Therefore, improving battery device performance is a pressing technical challenge. Utility Model Content

[0004] This application provides a battery device and an electrical appliance, which helps to improve the performance of the battery device.

[0005] In a first aspect, a battery device is provided, including a housing, a plurality of battery cell assemblies, and an end plate, wherein the housing forms an accommodating space and has a bottom plate; the plurality of battery cell assemblies are accommodated in the accommodating space, the plurality of battery cell assemblies are arranged along a first direction, and each battery cell assembly includes a plurality of battery cells arranged along a second direction; the end plate is accommodated in the accommodating space and abuts against at least one end of the plurality of battery cell assemblies along the second direction, the end plate includes a plurality of support beams extending along a third direction and spaced apart along the first direction; wherein the bottom plate includes a plurality of first through holes spaced apart along the first direction, the plurality of support beams pass through the plurality of first through holes and are connected to the bottom plate, and the first direction, the second direction, and the third direction are mutually perpendicular.

[0006] In this embodiment, the base plate includes a plurality of first through holes spaced apart along a first direction. A plurality of support beams pass through these first through holes and are connected to the base plate. Compared to blind holes in the base plate, where support beams are inserted and connected, this method offers weaker mechanical support, especially under conditions requiring high stress or vibration, and cannot provide sufficient stability. In this application, however, by having multiple support beams pass through the first through holes and connect to the base plate, stronger mechanical support and higher mechanical stability are provided, thus improving the performance of the battery device. Secondly, when the housing is subjected to vibration or external impact, the connection point between the support beams and the base plate through the first through holes is less prone to loosening or detachment, thereby improving the reliability of the connection between the support beams and the base plate. Furthermore, the connection of the support beams to the base plate through the first through holes allows the end plates to better resist expansion forces, improving the safety performance of the battery device.

[0007] In some embodiments, the housing has a cover, the cover including a plurality of second through holes spaced apart along a first direction, and a plurality of support beams passing through the second through holes and connected to the cover.

[0008] In this embodiment, the cover includes a plurality of second through holes spaced apart along a first direction. Multiple support beams pass through these second through holes and connect to the cover. Compared to blind holes in the cover where the support beams are inserted and connected, this method offers weaker mechanical support, especially under conditions requiring high stress or vibration, and cannot provide sufficient stability. In this application, however, by having multiple support beams pass through multiple second through holes and connect to the cover, stronger mechanical support and higher mechanical stability are provided. Furthermore, when the casing is subjected to vibration or external impact, the connection point between the support beams and the cover through the second through holes is less prone to loosening or detachment, thus improving the reliability of the connection between the support beams and the cover. Additionally, the connection of the support beams to the cover through the second through holes allows the end plates to better resist expansion forces, thereby improving the safety performance of the battery device.

[0009] In some embodiments, the end plate further includes a first crossbeam, a second crossbeam, and a support plate. The first crossbeam and the second crossbeam extend along a first direction and are arranged opposite each other along a third direction. The support plate extends along a third direction and its two ends along the third direction are respectively connected to the first crossbeam and the second crossbeam. One end of the support beam along the third direction passes through the first crossbeam and is connected to the cover, and the other end passes through the second crossbeam and is connected to the bottom plate.

[0010] In this embodiment, the support plate extends along a third direction and its two ends along this direction are connected to the first and second crossbeams, respectively, which can improve the overall rigidity of the end plate. Furthermore, the support plate connects the first and second crossbeams, reducing the risk of relative displacement or torsion of the first and second crossbeams in the third direction. Additionally, one end of the support beam passes through the first crossbeam along the third direction and connects to the cover, while the other end passes through the second crossbeam and connects to the bottom plate. This structure allows the end plate to have higher overall rigidity, and when the end plate is subjected to external pressure, impact, or vibration, this structure can better resist deformation, making the end plate more stable. Moreover, the above-mentioned end plate structure can transfer the expansion force generated by the battery cells in the battery cell assembly to the two first and second crossbeams through the support beams and support plate, and then from the first and second crossbeams to the housing, thereby dispersing stress, avoiding localized stress concentration, and improving the overall expansion resistance of the battery device.

[0011] In some embodiments, the support plate includes a first sub-support plate and a second sub-support plate located at both ends of the first crossbeam and the second crossbeam along a first direction, respectively. The first sub-support plate is connected to one end of the first crossbeam and the second crossbeam, and the second sub-support plate is connected to the other end of the first crossbeam and the second crossbeam, respectively.

[0012] In this embodiment, the first sub-support plate is connected to one end of the first and second crossbeams, respectively, and the second sub-support plate is connected to the other end of the first and second crossbeams, respectively. This makes the end plate structure more stable and improves the overall stability of the end plate structure. Compared to a single support plate that can only provide support on one side, this application can improve torsional resistance. In addition, the first and second sub-support plates can save materials while improving the structural strength of the end plate, making the overall structure lightweight.

[0013] In some embodiments, the first crossbeam, the second crossbeam, or the support plate includes a first plate and a second plate, the first plate being perpendicular to the second direction and abutting against the battery cell, and the second plate being connected to the first plate and bent relative to the first plate.

[0014] In this embodiment, by setting the first plate to abut against the battery cell, the contact area between the end plate and the battery cell assembly can be increased, thereby enhancing the end plate's ability to resist the expansion force of the battery cells in the battery cell assembly. The second plate is connected to the first plate and is relatively bent, which can further provide support for the first plate in a third direction, thereby strengthening the overall expansion resistance of the end plate. In addition, setting the structure of each beam in the end plate as an interconnected and relatively bent first and second plate can simplify the overall structure of the end plate, improve the structural strength of the end plate, further reduce the weight of the end plate, and improve the overall lightweighting of the battery device.

[0015] In some embodiments, the first crossbeam, the second crossbeam, or the support plate further includes a third plate, which is connected to the first plate and bent relative to the first plate, and is positioned opposite to and spaced apart from the second plate.

[0016] In the technical solution of this application embodiment, by setting a third plate, the structural stability of the end plate can be enhanced, thereby improving the end plate's ability to resist the expansion of individual battery cells. Furthermore, the first crossbeam, second crossbeam, or support plate of the end plate are composed of one or more plates spliced ​​together, resulting in a simple and easy-to-implement structure with a light weight, thus improving the overall lightweighting of the battery device.

[0017] In some embodiments, the enclosure includes: a frame having a first opening and a second opening, the first opening and the second opening being located on opposite sides in a third direction and communicating with each other; a cover connected to the frame and closing the first opening; a bottom plate connected to the frame and closing the second opening, the bottom plate, the frame and the cover together forming an accommodating space, and end plates connected to the frame at both ends in a first direction.

[0018] In this embodiment, on the one hand, the openings on both sides of the frame are connected to the cover and the bottom plate respectively. Compared with an integrated box structure, this facilitates the replacement of the cover and the bottom plate without the need for additional protective plates to resist external ball impacts, simplifying the structure of the battery device and improving the overall lightweighting of the battery device. On the other hand, the end plates are connected to the frame at both ends along the first direction, which improves the stability of the end plates. Furthermore, the expansion force of the battery cells can be transmitted to the frame through the end plates, with the frame resisting part of the expansion force, thereby improving the overall anti-expansion performance of the battery device.

[0019] In some embodiments, a portion of the cover corresponding to the end plate is recessed into the receiving space to form a cover recess, a plurality of second through holes are provided in the cover recess, and the portion of the support beam passing through the second through holes has a third-direction dimension that is less than or equal to the third-direction dimension of the cover recess.

[0020] In this embodiment, multiple second through holes are provided in the recessed portion of the cover, and the portion of the support beam passing through the second through holes has a third-direction dimension that is less than or equal to the third-direction dimension of the recessed portion of the cover. This can increase the connection strength at the connection between the cover and the end plate, while providing accommodating space for the support beam, saving space for the battery device, and maintaining the flatness of the cover. In addition, it can make the overall battery device lighter.

[0021] In some embodiments, a portion of the base plate corresponding to the end plate is recessed into the receiving space to form a base plate recess, a plurality of first through holes are provided in the base plate recess, and the dimension of the portion of the support beam passing through the first through holes in the third direction is less than or equal to the dimension of the base plate recess in the third direction.

[0022] In this embodiment, multiple first through holes are provided in the recessed portion of the base plate, and the dimension of the portion of the support beam passing through the first through holes in the third direction is less than or equal to the dimension of the recessed portion of the base plate in the third direction. This can increase the connection strength at the connection between the base plate and the end plate, while providing accommodating space for the support beam, saving space for the battery device, and maintaining the flatness of the base plate; in addition, it can make the overall battery device lighter.

[0023] In some embodiments, the end plate abuts against a first wall, which is the wall of the battery cell abutting against the end plate having the largest area and being close to the end plate, and the first wall is perpendicular to a second direction.

[0024] In this embodiment, the end plate abuts against a first wall, which is the wall of the battery cell with the largest area closest to the end plate, and is perpendicular to the second direction. The expansion force generated by the battery cell is mainly on the first wall of the battery cell. By abutting the end plate against the first wall, the expansion force generated by the battery cell can be transferred to the end plate to better resist the expansion force. In addition, abutting the end plate against the first wall can help improve the bending resistance of the end plate and improve its stability. In some embodiments, the battery device also includes a plurality of support members spaced apart along the first direction. A plurality of battery cell assemblies are mounted on the plurality of support members, and each support member extends along the second direction and is connected to the second crossbeam.

[0025] In some embodiments, the end plate is made of steel.

[0026] In this embodiment, the end plate is made of steel, which has high yield strength and tensile strength, effectively withstanding the expansion force generated by the battery cells during charging and discharging, reducing the deformation or damage of the end plate due to excessive stress. The high rigidity of steel enables the end plate to maintain its shape stability under expansion force, thereby improving the overall stability of the battery device.

[0027] In some embodiments, the support beam is a fastener.

[0028] In this embodiment, the support beam is a fastener, which facilitates the connection between the support beam and the base plate or cover, thereby enabling rapid assembly.

[0029] In a second aspect, an electrical device is provided, including a battery device as described in any of the first aspects, wherein the battery device provides electrical energy to the electrical device. Attached Figure Description

[0030] Figure 1 A schematic diagram of the structure of a vehicle provided in one embodiment of this application is shown.

[0031] Figure 2 A schematic diagram of the structure of a battery device provided in an embodiment of this application is shown.

[0032] Figure 3 A schematic diagram of the structure of a battery device provided in another embodiment of this application is shown.

[0033] Figure 4 A schematic diagram of the structure of a battery device provided in another embodiment of this application is shown.

[0034] Figure 5 A partial structural schematic diagram of a battery device provided in one embodiment of this application is shown.

[0035] Figure 6 A schematic diagram of the structure of a battery device provided in another embodiment of this application is shown.

[0036] Figure 7 A cross-sectional schematic diagram of an end plate provided in one embodiment of this application is shown.

[0037] Figure 8 A cross-sectional schematic diagram of an end plate provided in another embodiment of this application is shown.

[0038] Figure 9 A schematic diagram of the structure of an end plate provided in an embodiment of this application is shown.

[0039] Figure label:

[0040] Vehicle 1, battery unit 10, battery cell 20, controller 30, motor 40, housing 12, frame 50, cover 11, cover recess 111, bottom plate 60, bottom plate recess 601, first through hole 61, second through hole 62, battery cell assembly 70, end plate 80, support beam 82, support plate 83, first sub-support plate 831, second sub-support plate 832, first crossbeam 810, second crossbeam 811, first wall 21, support member 90, first plate 1501, second plate 1502, third plate 1503. Detailed Implementation

[0041] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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).

[0049] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0050] 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.

[0051] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0052] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. 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.

[0053] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0054] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0055] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0056] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0057] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0058] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0059] With increasing environmental pollution, the new energy industry is attracting more and more attention. Battery technology is a crucial factor in the development of this industry. In the development of battery technology, end plates are typically installed on the walls of the battery cells to resist the expansion forces generated by the cells. These end plates are usually connected to blind holes in the inner wall of the casing to secure them. However, this method of securing the end plates through blind holes is unstable under expansion forces or external impacts, causing them to detach from the casing and thus reducing their anti-expansion performance.

[0060] Based on the above considerations, in order to improve the stability of the end plate while better resisting the expansion force generated by the battery cells, this application provides a battery device, including a housing, multiple battery cell assemblies, and an end plate. The housing forms an accommodating space and has a bottom plate. Multiple battery cell assemblies are housed in the accommodating space, arranged along a first direction, and each battery cell assembly includes multiple battery cells arranged along a second direction. The end plate is housed in the accommodating space and abuts against at least one end of the multiple battery cell assemblies along the second direction. The end plate includes multiple support beams extending along a third direction and spaced apart along the first direction. The bottom plate includes multiple first through holes spaced apart along the first direction, and the multiple support beams pass through these first through holes and connect to the bottom plate. The first, second, and third directions are mutually perpendicular. The bottom plate, with its multiple first through holes spaced apart along the first direction and multiple support beams passing through these holes and connecting to the bottom plate, offers weaker mechanical support compared to blind holes in the bottom plate. This is particularly problematic in scenarios requiring significant stress or vibration, where it cannot provide sufficient stability. In this application, multiple support beams passing through multiple first through holes and connected to the base plate provide stronger mechanical support and higher mechanical stability, thereby improving the performance of the battery device. Secondly, when the casing is subjected to vibration or external impact, the connection points between the support beams and the base plate through the first through holes are less likely to loosen or detach, thus improving the reliability of the connection. Furthermore, the connection of the support beams to the base plate through the first through holes allows the end plates to better resist expansion forces, improving the safety performance of the battery device.

[0061] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices. For example, such electrical devices can be 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 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.

[0062] It should be understood that the technical solutions described in the embodiments of this application are not limited to the electrical equipment described above, but can also be applied to all equipment using battery devices. For the sake of simplicity, the following embodiments will be described in detail using a vehicle as an example of electrical equipment.

[0063] For example, such as Figure 1 As shown, Figure 1 A schematic diagram of a vehicle 1 according to an embodiment of this application is shown. 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's electrical system, or it can be used to meet the power needs of vehicle 1's starting, navigation, and operation. In some implementations 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, replacing or partially replacing gasoline or natural gas to provide driving power to vehicle 1.

[0064] Figure 2 A schematic diagram of the structure of a battery device 10 provided in an embodiment of this application is shown. Figure 3 A schematic diagram of the structure of a battery device 10 provided in another embodiment of this application is shown.

[0065] It should be understood that, for ease of description, the embodiments in this application are described as follows: Figure 2 and Figure 3As shown, taking the battery device 10 in the figure as an example, the first direction X can be the width direction of the battery device 10, or the arrangement direction of multiple battery cell assemblies 70. The second direction Y can be the length direction of the battery device 10, or the arrangement direction of the battery cells 20 in the battery cell assembly 70. The third direction Z can be the height direction of the battery device 10, and the third direction Z is perpendicular to the first direction X and the second direction Y, or the third direction Z can also be the length direction of the support beam 82. It should also be understood that the directional descriptions in all figures in the embodiments of this application are consistent with... Figure 2 and Figure 3 The directional descriptions are consistent with those in the text, and will not be repeated hereafter.

[0066] In some implementations, such as Figure 2 and Figure 3 As shown, the battery device 10 includes a housing 12, a plurality of battery cell assemblies 70, and an end plate 80. The housing 12 forms an accommodating space and has a bottom plate 60. The plurality of battery cell assemblies 70 are housed in the accommodating space and are arranged along a first direction X. Each battery cell assembly 70 includes a plurality of battery cells 20 arranged along a second direction Y. The end plate 80 is housed in the accommodating space and abuts against at least one end of the plurality of battery cell assemblies 70 along the second direction Y. The end plate 80 includes a plurality of support beams 82 extending along a third direction Z and spaced apart along the first direction X. The bottom plate 60 includes a plurality of first through holes 61 spaced apart along the first direction X. The plurality of support beams 82 pass through the plurality of first through holes 61 and are connected to the bottom plate 60. The first direction X, the second direction Y, and the third direction Z are mutually perpendicular.

[0067] 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 3 The cuboid shown can also be different. Figure 3 The embodiments shown are cylindrical or other shapes, but are not limited to these.

[0068] In some embodiments, to improve the space utilization within the battery device 10, the battery cells 20 within the battery device 10 are typically arranged in a certain pattern. For example, as... Figure 3 As shown, the battery device 10 may include a plurality of battery cells 20 arranged along the second direction Y; further, if the number of battery cells 20 in the battery device 10 is large, the battery device 10 may also include a plurality of battery cell assemblies 70 arranged along the first direction X.

[0069] The housing 12 in this embodiment may include a cover 11 with an opening and a bottom plate 60, the bottom plate 60 being used to cover the cover 11; the housing 12 may also include multiple structures such as the cover 11, the bottom plate 60 and the frame 50, one end of the frame 50 being connected to the cover 11 and the other end being connected to the bottom plate 60 to form a receiving space for accommodating the battery cell assembly 70.

[0070] It should be understood that the end plate 80, housed in the receiving space and abutting against at least one end of the plurality of battery cell modules 70 along the second direction Y, can be categorized into the following cases:

[0071] In one scenario, when there is only one end plate 80, the end plate 80 abuts against any end of the battery cell assembly 70 along the second direction Y.

[0072] In another scenario, when there are two end plates 80, the two end plates 80 abut against the two ends of the battery cell assembly 70 along the second direction Y.

[0073] It should also be understood that the end plate 80 abuts against at least one end of the plurality of battery cell assemblies 70 along the second direction Y. When the battery assembly 10 includes a housing 12 and a plurality of battery cell assemblies 70 bound together by straps, the end plate 80 can abut against at least one end of the plurality of battery cell assemblies 70 bound together by straps along the second direction Y. When the battery assembly 10 includes a cover 11, a frame 50, and a base plate 60, the end plate 80 can abut against at least one end of the plurality of battery cell assemblies 70 while also being connected and fixed to the cover 11, the frame 50, and the base plate 60 to transmit the expansion force generated by the battery cell 20.

[0074] It should also be understood that the base plate 60 includes a plurality of first through holes 61 spaced apart along the first direction X. The number of first through holes 61 can be the same as the number of support beams 82, and the first through holes 61 and support beams 82 can be set in a one-to-one correspondence.

[0075] In this embodiment, multiple support beams 82 pass through multiple first through holes 61 and are connected to the base plate 60. Any one of the multiple support beams 82 passes through the first through hole 61 corresponding to the multiple first through holes 61 and is connected to the base plate 60. Specifically, the portion of the support beam 82 passing through the first through hole 61 along the third direction Z passing through the base plate 60 can be fixedly connected to the base plate 60 by a nut. It should be understood that the portion of the support beam 82 passing through the base plate 60 along the third direction Z passing through the base plate 60 can also be connected to the base plate 60 in other ways, and this application does not limit this in any way.

[0076] It should be understood that the support beam 82 can be a long bolt, which can be composed of a threaded rod and a nut. The support beam 82, i.e., the threaded rod, passes through the first through hole 61 and is fixedly connected to the base plate 60 by the nut.

[0077] Optionally, on a plane perpendicular to the third direction Z, the area of ​​the orthographic projection of the first through hole 61 is equal to or slightly larger than the area of ​​the orthographic projection of the support beam 82 passing through the first through hole 61. This allows the support beam 82 to just pass through the first through hole 61 while also increasing the strength of the base plate 60, thereby further improving the stability and reliability of the base plate 60.

[0078] It should also be understood that the shape of the first through hole 61 can be the same as the shape of the support beam 82 in the plane perpendicular to the third direction Z, for example, both being circular, arc-shaped, or square, etc. It should also be understood that the shape of the first through hole 61 can be different from the shape of the support beam 82 in the plane perpendicular to the third direction Z; this application does not impose any limitations on this. The shape of the support beam 82 can be a regular cylinder or cuboid, or an irregularly shaped column; this application does not impose any limitations on this.

[0079] It should also be understood that the support beam 82 may have a spiral pattern on the outside to facilitate a fixed connection with the nut.

[0080] It should also be understood that the material of the support beam 82 can be aluminum alloy or steel, etc. Any material that can provide sufficient mechanical strength and effectively protect the battery cell assembly 70 from vibration, impact and expansion is within the protection scope of the embodiments of this application, and this application does not limit it in any way.

[0081] It should also be understood that the two ends of the end plate 80 along the first direction X can be fixedly connected to the inner wall of the housing 12 to improve the stability and reliability of the end plate 80. In addition, the two ends of the end plate 80 along the first direction X can also be fixedly connected to the frame 50 in the housing 12. Since the frame 50 generally has sufficient mechanical strength, the connection between the end plate 80 and the frame 50 can improve the stability and reliability of the end plate 80. At the same time, the expansion force generated by the battery cell 20 in the battery cell assembly 70 can be transmitted to the end plate 80 through the end plate 80. The frame 50 can resist the expansion force, thus improving the expansion resistance performance of the battery device 10.

[0082] In this embodiment, the bottom plate 60 of the housing 12 includes a plurality of first through holes 61 spaced apart along a first direction X. A plurality of support beams 82 pass through the plurality of first through holes 61 and are connected to the bottom plate 60. Compared to inserting the support beams 82 into blind holes in the bottom plate 60 and connecting them, this method provides weaker mechanical support, especially in scenarios requiring high stress or vibration, and cannot provide sufficient stability. In this application, however, by having multiple support beams 82 pass through the plurality of first through holes 61 and connect to the bottom plate 60, stronger mechanical support and higher mechanical stability are provided, thereby improving the performance of the battery device 10. Secondly, when the housing 12 is subjected to vibration or external impact, the connection point between the support beams 82 and the bottom plate 60 through the first through holes 61 is less likely to loosen or detach, thus improving the reliability of the connection. Furthermore, the connection of the support beams 82 to the bottom plate 60 through the first through holes 61 allows the end plate 80 to better resist expansion forces, thereby improving the safety performance of the battery device 10.

[0083] Figure 4 A schematic diagram of the structure of a battery device 10 provided in another embodiment of this application is shown. Figure 5 A partial structural schematic diagram of a battery device 10 according to an embodiment of this application is shown. Exemplary, Figure 5 for Figure 4 A partial structural diagram.

[0084] According to some embodiments of this application, optionally, it can be combined with Figures 2 to 5 As described, the housing 12 has a cover 11, which includes a plurality of second through holes 62 spaced apart along a first direction X, and a plurality of support beams 82 passing through the second through holes 62 and connected to the cover 11.

[0085] It should be understood that the box body 12 has a cover 11, the cover 11 includes a plurality of second through holes 62 spaced apart along the first direction X, the cover 11 of the box body 12 includes a plurality of second through holes 62 spaced apart along the first direction X, the number of second through holes 62 can be the same as the number of support beams 82, and the second through holes 62 and support beams 82 can be set one-to-one.

[0086] In this embodiment, multiple support beams 82 pass through multiple second through holes 62 and are connected to the cover 11. Any one of the multiple support beams 82 passes through the corresponding second through hole 62 and is connected to the cover 11. Specifically, the portion of the support beam 82 passing through the second through hole 62 along the third direction Z passing through the cover 11 can be fixedly connected to the cover 11 by a nut. It should be understood that the portion of the support beam 82 passing through the cover 11 along the third direction Z can also be connected to the cover 11 in other ways, and this application does not limit this in any way.

[0087] Optionally, on a plane perpendicular to the third direction Z, the area of ​​the orthographic projection of the second through hole 62 is equal to or slightly larger than the area of ​​the orthographic projection of the support beam 82 passing through the second through hole 62. This allows the support beam 82 to just pass through the second through hole 62 while increasing the strength of the cover 11, thereby improving the stability and reliability of the cover 11.

[0088] It should also be understood that the shape of the second through hole 62 can be the same as the shape of the support beam 82 in the plane perpendicular to the third direction Z, for example, both can be circular, arc-shaped, or square, etc. It should also be understood that the shape of the second through hole 62 can be different from the shape of the support beam 82 in the plane perpendicular to the third direction Z, and this application does not impose any limitations on this.

[0089] In this embodiment, the cover 11 includes a plurality of second through holes 62 spaced apart along a first direction X. A plurality of support beams 82 pass through the second through holes 62 and are connected to the cover 11. Compared to inserting the support beams 82 into blind holes in the cover 11 and connecting them, this method provides weaker mechanical support, especially in scenarios requiring high stress or vibration, and cannot provide sufficient stability. In this application, however, by having multiple support beams 82 pass through multiple second through holes 62 and connect to the cover 11, stronger mechanical support and higher mechanical stability are provided. Furthermore, when the housing 12 is subjected to vibration or external impact, the connection point between the support beams 82 and the cover 11 through the second through holes 62 is less likely to loosen or detach, thus improving the reliability of the connection. Additionally, the connection of the support beams 82 to the cover 11 through the second through holes 62 allows the end plate 80 to better resist expansion forces, thereby improving the safety performance of the battery device 10.

[0090] In some embodiments, it can be combined Figures 2 to 5 As described, the end plate 80 abuts against the first wall 21, which is the wall with the largest area of ​​the battery cell 20 abutting against the end plate 80 and is close to the end plate 80, and the first wall 21 is perpendicular to the second direction Y.

[0091] Optionally, in the first direction X, the support beam 82 can be located at the middle of the first wall 21 of the battery cell 20; wherein, the first wall 21 is the wall of the battery cell 20 with the largest area that abuts against the end plate 80 and is close to the end plate 80, and the first wall 21 is perpendicular to the second direction Y. The middle position can be the middle region of the first wall 21; for example, if the first wall 21 is divided into three equal parts in the first direction X, the middle position can be the middle part of the three parts, meaning the support beam 82 can be located at any position in this middle part. Alternatively, the center position can also be the exact center of the first wall 21 in the first direction X. The support beam 82 is located in the middle of the first wall 21 of the battery cell 20. The first wall 21 is perpendicular to the second direction Y and is the wall with the largest area of ​​the battery cell 20. That is, the expansion force generated by the battery cell 20 is mainly on the first wall 21 of the battery cell 20. By setting the support beam 82 on the first wall 21 of the battery cell 20, the expansion force generated by the battery cell 20 can be transferred to the bottom plate 60 and the cover 11 to better resist the expansion force. At the same time, the support beam 82 can be located in the middle of the first wall 21 of the battery cell 20 to better resist the expansion force.

[0092] It should also be understood that, in the first direction X, the support beam 82 can also be located at any position on the first wall 21 of the battery cell 20, and this application does not impose any limitations on this.

[0093] It should also be understood that multiple support beams 82 can be provided on the first wall 21 of the battery cell 20, which can better resist expansion force and improve the bending resistance of the end plate 80, thereby enhancing the stability of the end plate 80.

[0094] In this embodiment, the end plate 80 abuts against the first wall 21. The first wall 21 is the wall with the largest area of ​​the battery cell 20 abutting against the end plate 80 and is close to the end plate 80. The first wall 21 is perpendicular to the second direction Y. The expansion force generated by the battery cell 20 is mainly on the first wall 21 of the battery cell 20. By abutting the end plate 80 against the first wall 21, the expansion force generated by the battery cell 20 can be transferred to the end plate 80 to better resist the expansion force. In addition, the abutting of the end plate 80 against the first wall 21 can help improve the bending resistance of the end plate 80 and improve the stability of the end plate 80.

[0095] Figure 6 A schematic diagram of the structure of a battery device 10 provided in another embodiment of this application is shown. Figure 7 A cross-sectional schematic diagram of an end plate 80 provided in one embodiment of this application is shown. Figure 8 A cross-sectional schematic diagram of an end plate 80 provided in another embodiment of this application is shown. Figure 9 A schematic diagram of the structure of an end plate 80 according to an embodiment of this application is shown. Exemplary, Figure 8 for Figure 9 A cross-sectional schematic diagram.

[0096] According to some embodiments of this application, optionally, it can be combined with Figures 2 to 9 As described, the end plate 80 also includes a first crossbeam 810, a second crossbeam 811, and a support plate 83. The first crossbeam 810 and the second crossbeam 811 extend along a first direction X and are arranged opposite each other along a third direction Z. The support plate 83 extends along a third direction Z and its two ends along the third direction Z are respectively connected to the first crossbeam 810 and the second crossbeam 811. The support beam 82 passes through the first crossbeam 810 at one end along the third direction Z and is connected to the cover 11, and passes through the second crossbeam 811 and is connected to the bottom plate 60 at the other end.

[0097] It should be understood that the number of support plates 83 can be one or more, specifically in the following ways:

[0098] In one scenario, where there is only one support plate 83, the support plate 83 is positioned between the first crossbeam 810 and the second crossbeam 811. The support plate 83 can be positioned along the first direction X at the midpoint between the first crossbeam 810 and the second crossbeam 811, which is more advantageous for supporting the first crossbeam 810 and the second crossbeam 811 while simultaneously transmitting the expansion force generated by the battery cell 20. It should be understood that the support plate 83 can be positioned at any position along the first direction X between the first crossbeam 810 and the second crossbeam 811, and this application does not impose any limitations on this.

[0099] In another scenario, if there are two support plates 83, they can be positioned at either end of the first crossbeam 810 and the second crossbeam 811 along the first direction X, or at any position of the first crossbeam 810 and the second crossbeam 811 along the first direction X. This application does not impose any limitations on this.

[0100] In another case, if there are multiple support plates 83, they can be set at any position along the first direction X of the first crossbeam 810 and the second crossbeam 811. This application does not impose any limitations on this.

[0101] Optionally, the support plate 83 can be connected to the inner wall of the first crossbeam 810 and the second crossbeam 811 in the third direction Z to save space and improve the overall energy density of the battery device 10. Alternatively, the support plate 83 can also protrude in the third direction Z, and the protruding part can be fixedly connected to the first crossbeam 810 and the second crossbeam 811 by bolts or adhesive.

[0102] One end of the support beam 82 along the third direction Z passes through the first crossbeam 810 and is connected to the cover 11, while the other end passes through the second crossbeam 811 and is connected to the bottom plate 60. It should be understood that one end of the support beam 82 along the third direction Z can also be connected to the cover 11 of the box 12 through a blind hole or other means, while the other end passes through the second crossbeam 811 and is connected to the bottom plate 60.

[0103] In this embodiment, the support plate 83 extends along the third direction Z and its two ends along the third direction Z are respectively connected to the first crossbeam 810 and the second crossbeam 811. The support plate 83 can improve the overall rigidity of the end plate 80. In addition, the support plate 83 connects the first crossbeam 810 and the second crossbeam 811, reducing the risk of relative displacement or torsion of the first crossbeam 810 and the second crossbeam 811 in the third direction Z. Furthermore, one end of the support beam 82 passes through the first crossbeam 810 along the third direction Z and is connected to the cover 11, while the other end passes through the second crossbeam 811 and is connected to the bottom plate 60. This structure can give the end plate 80 higher overall rigidity. When the end plate 80 is subjected to external pressure, impact or vibration, this structure can better resist deformation, making the shape of the end plate 80 stable. In addition, the aforementioned end plate 80 structure can transmit the expansion force generated by the battery cell 20 in the battery cell assembly 70 to the two crossbeams through the support beam 82 and the support plate 83, and then to the housing 12 through the first crossbeam 810 and the second crossbeam 811, thereby dispersing the stress, avoiding local stress concentration, and improving the overall expansion resistance performance of the battery device 10.

[0104] According to some embodiments of this application, optionally, it can be combined with Figures 2 to 9 As described, the support plate 83 includes a first sub-support plate 831 and a second sub-support plate 832 located at both ends along the first direction X of the first crossbeam 810 and the second crossbeam 811, respectively. The first sub-support plate 831 is connected to one end of the first crossbeam 810 and the second crossbeam 811, respectively, and the second sub-support plate 832 is connected to the other end of the first crossbeam 810 and the second crossbeam 811, respectively.

[0105] It should be understood that the first sub-support plate 831 and the second sub-support plate 832 can be set at any position along the first direction X of the first crossbeam 810 and the second crossbeam 811, and this application does not impose any limitation on this.

[0106] In this embodiment, the first sub-support plate 831 is connected to one end of the first crossbeam 810 and the second crossbeam 811, respectively, and the second sub-support plate 832 is connected to the other end of the first crossbeam 810 and the second crossbeam 811, respectively. This makes the end plate 80 structure more stable and improves the overall stability of the end plate 80 structure. Compared to a single support plate 83, which can only provide support on one side and has weaker torsional resistance, the first sub-support plate 831 and the second sub-support plate 832 can save materials and make the overall structure lighter while improving the structural strength of the end plate 80.

[0107] According to some embodiments of this application, optionally, it can be combined with Figures 2 to 9 As described, the first crossbeam 810 and / or the second crossbeam 811 include plate-like structures.

[0108] In this embodiment, when the end plate 80 is subjected to expansion force, the first crossbeam 810 and / or the second crossbeam 811, which include plate-like structures, can better resist bending deformation, thereby improving the bending resistance of the entire end plate 80. The first crossbeam 810 and / or the second crossbeam 811, which include plate-like structures, can have a larger connection area with the support beam 82, which means higher connection strength and better transmission and bearing of expansion force.

[0109] According to some embodiments of this application, optionally, the first crossbeam 810, the second crossbeam 811 or the support plate 83 includes a first plate 1501 and a second plate 1502. The first plate 1501 is perpendicular to the second direction Y and abuts against the battery cell 20. The second plate 1502 is connected to the first plate 1501 and is bent relative to the first plate 1501.

[0110] It should be understood that the end plate 80 may include a first crossbeam 810, a second crossbeam 811, and a support plate 83, any one, any two, or any three of which may include the first plate 1501 and the second plate 1502.

[0111] The first plate 1501 abuts against the battery cell 20, that is, the first plate 1501 abuts against one or two battery cells 20 on the outermost side of the battery cell assembly 70 along the second direction Y.

[0112] The first plate 1501 and the second plate 1502 are connected and bent relative to each other, that is, the plane containing the first plate 1501 and the plane containing the second plate 1502 form a certain angle, which can be an acute angle, a right angle, or an obtuse angle. For example, the plane containing the first plate 1501 and the plane containing the second plate 1502 form a right angle, that is, the second plate 1502 is perpendicular to the first plate 1501.

[0113] It should be understood that the second plate 1502 can be located at either end of the first plate 1501. For example, taking the cross section of the first beam 810 perpendicular to the first direction X as an example, the second plate 1502 can be located at the upper end of the first plate 1501 along the third direction Z, or the second plate 1502 can be located at the lower end of the first plate 1501 along the third direction Z, so that the first plate 1501 and the second plate 1502 of the first beam 810 are L-shaped or inverted L-shaped in this cross section. As another example, taking the cross section of the support plate 83 perpendicular to the first direction X as an example, the second plate 1502 can be located at the left end of the first plate 1501 along the second direction Y, or the second plate 1502 can be located at the right end of the first plate 1501 along the second direction Y, so that the first plate 1501 of the support plate 83 and the second plate 1502 of the first support plate 83 are L-shaped or inverted L-shaped in this cross section.

[0114] The first plate 1501 of the first crossbeam 810 and the first plate 1501 of the second crossbeam 811 can both extend along the first direction X, thereby abutting against the sidewalls of multiple battery cell assemblies 70 along the first direction X, that is, against the first wall 21 of the battery cell 20 of the battery cell assembly 70 that is closest to the first plate 1501 along the second direction Y. The first plate 1501 of the support plate 83 can abut against the sidewall of the corresponding battery cell assembly 70 along the second direction Y, that is, against the first wall 21 of the battery cell 20 of the corresponding battery cell assembly 70 that is closest to the first plate 1501 along the second direction Y.

[0115] The second plate 1502 of the first crossbeam 810 and the second plate 1502 of the second crossbeam 811 can also extend along the first direction X, thereby improving the stiffness of the first crossbeam 810 and the second crossbeam 811 and enhancing the overall stability of the end plate 80.

[0116] The battery cell 20 may include two first walls 21 disposed opposite to each other, and the first wall 21 against which the first plate 1501 abuts may be the wall closest to the end plate 80 in the outermost battery cell 20 along the second direction Y.

[0117] It should be understood that the first crossbeam 810, the second crossbeam 811 in the end plate 80, or the first plate 1501 and the second plate 1502 of the support plate 83 can be formed by bending the plates or by stamping, etc. The embodiments of this application are not limited to this.

[0118] In this embodiment, by setting the first plate 1501 to abut against the battery cell 20, the contact area between the end plate 80 and the battery cell assembly 70 can be increased, thereby enhancing the end plate 80's ability to resist the expansion force of the battery cell 20 in the battery cell assembly 70. The second plate 1502 is connected to the first plate 1501 and is relatively bent, which can further provide support for the first plate 1501 in the third direction Z, thereby strengthening the overall expansion resistance of the end plate 80. In addition, by setting the structure of each beam in the end plate 80 as the first plate 1501 and the second plate 1502 that are interconnected and relatively bent, the overall structure of the end plate 80 can be simplified, and while improving the structural strength of the end plate 80, the weight of the end plate 80 can be further reduced, thereby improving the overall lightweighting of the battery device 10.

[0119] According to some embodiments of this application, optionally, the first crossbeam 810, the second crossbeam 811 or the support plate 83 further includes a third plate 1503, the third plate 1503 is connected to the first plate 1501 and bent relative to the first plate 1501, and the third plate 1503 is opposite to and spaced apart from the second plate 1502.

[0120] It should be understood that any one, two, or three of the first crossbeam 810, the second crossbeam 811, and the support plate 83 may include the third plate 1503.

[0121] The third plate 1503 is connected to the first plate 1501 and bent relative to it. The third plate 1503 is opposite to the second plate 1502 and is spaced apart. That is, the plane where the third plate 1503 is located and the plane where the second plate 1502 is located are both perpendicular to the plane where the first plate 1501 is located. The first plate 1501 is located at the common end of the second plate 1502 and the third plate 1503 along the second direction Y.

[0122] The third plate 1503 and the second plate 1502 can be located at opposite ends of the first plate 1501. For example, taking the cross section of the first beam 810 perpendicular to the first direction X as an example, the second plate 1502 can be located at the upper end of the first plate 1501 along the third direction Z, and the third plate 1503 can be located at the lower end of the first plate 1501 along the third direction Z, so that the first plate 1501, the second plate 1502 and the third plate 1503 in the first beam 810 form a C-shape in this cross section. As another example, taking the cross section of the support plate 83 perpendicular to the third direction Z as an example, the second plate 1502 can be located at the left end of the first plate 1501 along the second direction Y, and the third plate 1503 can be located at the right end of the first plate 1501 along the second direction Y, so that the first plate 1501, the second plate 1502 and the third plate 1503 in the support plate 83 form a C-shape in this cross section.

[0123] In some embodiments, in the third direction Z, the third plate 1503 of the first crossbeam 810 is closer to the second crossbeam 811 than the second plate 1502 of the first crossbeam 810, and the third plate 1503 of the second crossbeam 811 is closer to the second plate 1502 of the second crossbeam 811 than the first crossbeam 810. For example, the second plate 1502 of the first crossbeam 810, the third plate 1503 of the first crossbeam 810, the third plate 1503 of the second crossbeam 811, and the second plate 1502 of the second crossbeam 811 are arranged sequentially in opposite directions in the third direction Z.

[0124] The third plate 1503 of the support plate 83 can also extend along the third direction Z, so that the two ends of the third plate 1503 along the third direction Z are respectively connected to the first crossbeam 810 and the second crossbeam 811. For example, if the second plate 1502 of the first crossbeam 810, the third plate 1503 of the first crossbeam 810, the third plate 1503 of the second crossbeam 811 and the second plate 1502 of the second crossbeam 811 are arranged in opposite directions along the third direction Z, then the two ends of the third plate 1503 of the support plate 83 along the third direction Z are respectively connected to the third plate 1503 of the first crossbeam 810 and the third plate 1503 of the second crossbeam 811.

[0125] The third plate 1503 of the first crossbeam 810 and the second crossbeam 811 can also extend along the first direction X, thereby further improving the rigidity of the first crossbeam 810 and the second crossbeam 811 and enhancing the overall stability of the end plate 80.

[0126] It should be understood that the first crossbeam 810, the second crossbeam 811 in the end plate 80, or the first plate 1501, the second plate 1502 and the third plate 1503 of the support plate 83 can be formed by bending the plates or by stamping, etc. The embodiments of this application are not limited to this.

[0127] In the technical solution of this application embodiment, by setting the third plate 1503, the structural stability of the end plate 80 can be enhanced, thereby improving the end plate 80's ability to resist the expansion of the battery cell 20. Furthermore, the first crossbeam 810, the second crossbeam 811, or the support plate 83 of the end plate 80 are assembled from one or more plates, making the structure of the end plate 80 simple, easy to implement, and lightweight, thereby improving the overall lightweighting of the battery device 10.

[0128] According to some embodiments of this application, optionally, it can be combined with Figures 2 to 9 As described above, the battery device 10 also includes a plurality of support members 90 spaced apart along the first direction X, a plurality of battery cell assemblies 70 mounted on the plurality of support members 90, and each support member 90 extends along the second direction Y and is connected to the second crossbeam 811.

[0129] It should be understood that the support member 90 is a long strip extending along the second direction Y. The support member 90 is connected to the second crossbeam 811 by fasteners. The support member 90 can be connected to the surface of the second crossbeam 811 on the side facing the base plate 60 in the third direction Z, and act as a pressure strip. In addition, the support member 90 can also be connected to the surface of the second crossbeam 811 on the side away from the base plate 60 in the third direction Z.

[0130] It should also be understood that the support member 90 connects the front and rear end plates 80. When the battery cell 20 expands, the support member 90 can withstand a certain expansion force. The end plate 80 is locked with the top cover and the frame 50 of the housing 12 to form a closed-loop structure, which improves the ability of the battery device 10 to resist expansion force.

[0131] Optionally, when there is only one end plate 80, one end of the support member 90 in the second direction Y is connected to the end plate 80, and the other end can be connected to the frame 50. Alternatively, the expansion force generated by the battery cell 20 can be transmitted to the support member 90 to share part of the expansion force.

[0132] It should be understood that multiple battery cell modules 70 are mounted on multiple support members 90. For example, multiple battery cell modules 70 are configured in a one-to-one correspondence with multiple support members 90, meaning one support member 90 is provided for each battery cell module 70. This provides better support and better transmission of the expansion force generated by the battery cell 20, thus better resisting the expansion force. Alternatively, any one of the multiple battery cell modules 70 can correspond to multiple support members 90, which can better transmit the expansion force. Furthermore, some of the multiple battery cell modules 70 may not have support members 90, while others may have one or more support members 90. This can transmit the expansion force while increasing the energy density of the battery device 10.

[0133] In this embodiment, the support member 90 extends along the second direction Y and is connected to the second crossbeam 811 near the frame 50. The support member 90 can support the battery cell assembly 70 while transmitting the expansion force generated by the battery cell 20, thereby further resisting the expansion force.

[0134] Optionally, multiple support members 90 are spaced apart along the first direction X; wherein two adjacent battery cell assemblies 70 are mounted on the same support member 90.

[0135] It should be understood that when two adjacent battery cell modules 70 are mounted on the same support 90, the expansion force generated by the two adjacent battery cell modules 70 can be transferred to the same support 90, saving material of the support 90. This makes the entire battery device 10 lighter while also resisting expansion force.

[0136] It should also be understood that when there is only one battery cell assembly 70, multiple support members 90 can be erected on the support member 90.

[0137] In this embodiment of the application, two adjacent battery cell assemblies 70 are mounted on the same support member 90, which can transmit the expansion force generated by the battery cell 20 and make the battery device 10 lighter overall.

[0138] According to some embodiments of this application, optionally, it can be combined with Figures 2 to 9 The enclosure 12 includes: a frame 50 having a first opening and a second opening, the first opening and the second opening being located on opposite sides of a third direction Z and communicating with each other; a cover 11 connected to the frame 50 and closing the first opening; a bottom plate 60 connected to the frame 50 and closing the second opening, the bottom plate 60, the frame 50 and the cover 11 together forming an accommodating space, and end plates 80 connected to the frame 50 at both ends along a first direction X.

[0139] It should be understood that the frame 50 of the battery device 10 in this embodiment can be used to support multiple battery cells 20. The frame 50 in this embodiment can be a hollow structure formed by four beams connected end-to-end, and has at least one opening. For example, the frame 50 can have two openings, located at both ends of the frame 50 along the third direction Z. The frame 50 can also have multiple openings, for example, four openings, located at the four end faces of the frame 50 parallel to the third direction Z. This embodiment is not limited to these.

[0140] In this embodiment, the frame 50 may further include multiple beams, such as multiple longitudinal beams and multiple transverse beams between four beams arranged in pairs opposite each other. Furthermore, the cross-sectional shape of each beam may be rectangular, polygonal, plate-shaped, or irregular, such as L-shaped, T-shaped, or C-shaped.

[0141] In some embodiments, the frame 50 may have a first opening and a second opening, which are located on opposite sides of the frame 50 along a third direction Z. Multiple battery cells 20 can be placed from either the first or second opening into the receiving space formed by the cover 11, the frame 50, and the base plate 60.

[0142] In this embodiment of the application, the cover 11 and the base plate 60 of the battery device 10 can both be connected to the frame 50 and respectively cover the two openings of the frame 50.

[0143] It should be understood that the structures of the cover 11 and the base plate 60 in this application embodiment can be configured according to actual applications. For example, the cover 11 and the base plate 60 can both be hollow cuboids with one face as an opening. The opening of the cover 11 is opposite to the first opening of the frame 50, and the opening of the base plate 60 is opposite to the second opening of the frame 50. The cover 11 and the side containing the first opening of the frame 50 are interlocked, and the base plate 60 and the side containing the second opening of the frame 50 are interlocked. The cover 11, the frame 50, and the base plate 60 together form a closed chamber.

[0144] For example, the cover 11 is a hollow cuboid with one open side, and the base plate 60 is a plate-like structure with a certain thickness. The opening of the cover 11 is positioned opposite to the first opening of the frame 50, so that the cover 11 covers the first opening of the frame 50. The base plate 60 covers the second opening of the frame 50, and the cover 11, the frame 50, and the base plate 60 together form a closed chamber.

[0145] The enclosed chamber formed by the cover 11, frame 50, and base plate 60 can accommodate one or more battery cells 20. Multiple battery cells 20 are connected in parallel, series, or mixed configurations and placed within the accommodating space formed by the sequential fastening of the cover 11, frame 50, and base plate 60. The cover 11, frame 50, and base plate 60 have a simple structure and can be adapted to different models of battery cells 20, allowing for modular production. Furthermore, the cover 11 and frame 50, and the frame 50 and base plate 60, can be connected using simple methods such as connectors, adhesive bonding, or thermal fusion, enabling rapid assembly of the battery device 10 and improving its assembly efficiency. Alternatively, the frame 50 and base plate 60 can be integrally formed. For example, the base plate 60 has a plate-like structure, with its edges bent to form the frame 50. In addition, the openings on both sides of the frame 50 are connected to the cover 11 and the bottom plate 60 respectively. Compared with the one-piece box structure 12, it is easier to replace the cover 11 and the bottom plate 60 without the need to add an extra protective plate to resist external ball impacts. This simplifies the structure of the battery device 10 and improves the overall lightweight of the battery device 10.

[0146] It should be understood that the shapes of the cover 11, frame 50 and base plate 60 in the embodiments of this application can be determined according to the shape of the components that are commonly housed by the three, for example, according to the shape of the combination of multiple battery cells 20 housed inside.

[0147] It should be understood that the end plate 80 is connected to the frame 50 at both ends along the first direction X. This connection can be achieved by the second crossbeam 811 being connected to the frame 50 at both ends along the second direction Y, or by the support plate 83 being connected to the frame 50 at both ends along the first direction X. The connection between the frame 50 and the end plate 80 can be achieved by welding, bonding, or riveting, etc. This application does not impose any limitations on this.

[0148] In this embodiment, on one hand, the openings on both sides of the frame 50 are connected to the cover 11 and the bottom plate 60 respectively. Compared with the integrated box structure 12, this facilitates the replacement of the cover 11 and the bottom plate 60 without the need for additional protective plates to resist external ball impacts, simplifying the structure of the battery device 10 and improving the overall lightweighting of the battery device 10. On the other hand, the end plates 80 are connected to the frame 50 at both ends along the first direction X, which improves the stability of the end plates 80. Furthermore, the expansion force of the battery cell 20 can be transmitted to the frame 50 through the end plates 80, with the frame 50 resisting part of the expansion force, thereby improving the overall anti-expansion performance of the battery device 10.

[0149] According to some embodiments of this application, optionally, it can be combined with Figures 2 to 9 As described, the portion of the cover 11 corresponding to the end plate 80 is recessed into the receiving space to form a cover recess 111. A plurality of second through holes 62 are provided in the cover recess 111, and the portion of the support beam 82 passing through the second through holes 62 has a third-order dimension that is less than or equal to the third-order dimension of the cover recess 111.

[0150] It should be understood that the plurality of second through holes 62 are provided in the recessed portion 111 of the cover body, or it can be described as that the plurality of second through holes 62 are arranged in the recessed portion 111 of the cover body along the first direction X, wherein the recessed portion 111 of the cover body and the cover body 11 can be an integrally formed structure, which can better resist the expansion force.

[0151] It should also be understood that the portion of the cover 11 corresponding to the end plate 80 is recessed into the receiving space to form the cover recess 111, that is, on the plane perpendicular to the third direction Z, the orthographic projection of the end plate 80 coincides with the orthographic projection of the cover recess 111.

[0152] Optionally, on a plane perpendicular to the third direction Z, the orthographic projection of the end plate 80 can cover the orthographic projection of the cover recess 111. That is, the length of the orthographic projection of the end plate 80 in the second direction Y is the same as the length of the orthographic projection of the cover recess 111 in the second direction Y, and the length of the orthographic projection of the end plate 80 in the first direction X is greater than the length of the orthographic projection of the cover recess 111 in the first direction X. This allows the orthographic projection of the support beam 82 on a plane perpendicular to the third direction Z to coincide with the orthographic projection of the cover recess 111.

[0153] In this embodiment, a plurality of second through holes 62 are provided in the recessed portion 111 of the cover, and the portion of the support beam 82 passing through the second through holes 62 has a dimension in the third direction Z that is less than or equal to the dimension of the recessed portion 111 of the cover in the third direction Z. This can increase the connection strength at the connection between the cover 11 and the end plate 80, while providing accommodating space for the support beam 82, saving space for the battery device 10, and maintaining the flatness of the cover 11; in addition, it can make the battery device 10 lighter overall.

[0154] According to some embodiments of this application, optionally, it can be combined with Figures 2 to 9 As described, the portion of the base plate 60 corresponding to the end plate 80 is recessed into the accommodating space to form a base plate recess 601. A plurality of first through holes 61 are provided in the base plate recess 601, and the dimension of the portion of the support beam 82 passing through the first through holes 61 in the third direction is less than or equal to the dimension of the base plate recess 601 in the third direction.

[0155] It should be understood that the plurality of first through holes 61 are provided in the recessed portion 601 of the base plate, or it can be described as that the plurality of first through holes 61 are arranged in the recessed portion 601 of the base plate along the first direction X. The recessed portion 601 of the base plate and the base plate 60 can be integrally formed, which can better resist the expansion force.

[0156] It should also be understood that the portion of the base plate 60 corresponding to the end plate 80 is recessed into the receiving space to form a base plate recess 601, that is, on a plane perpendicular to the third direction Z, the orthographic projection of the end plate 80 coincides with the orthographic projection of the base plate recess 601.

[0157] Optionally, on a plane perpendicular to the third direction Z, the orthographic projection of the end plate 80 can cover the orthographic projection of the recessed portion 601 of the bottom plate. That is, the length of the orthographic projection of the end plate 80 in the second direction Y is the same as the length of the orthographic projection of the recessed portion 601 of the bottom plate in the second direction Y, and the length of the orthographic projection of the end plate 80 in the first direction X is greater than the length of the orthographic projection of the recessed portion 601 of the bottom plate in the first direction X. This allows the orthographic projection of the support beam 82 on a plane perpendicular to the third direction Z to coincide with the orthographic projection of the recessed portion 601 of the bottom plate.

[0158] Optionally, on a plane perpendicular to the third direction Z, the orthographic projection of the recessed portion 601 of the base plate can coincide with the orthographic projection of the recessed portion 111 of the cover, thereby making the connection between the support beam 82 and the base plate 60 and the cover 11 more stable and better able to resist and transmit expansion force.

[0159] In this embodiment, a plurality of first through holes 61 are provided in the recessed portion 601 of the base plate, and the portion of the support beam 82 passing through the first through holes 61 has a dimension in the third direction Z that is less than or equal to the dimension of the recessed portion 601 of the base plate in the third direction Z. This can increase the connection strength at the connection between the base plate 60 and the end plate 80, while providing accommodating space for the support beam 82, saving space for the battery device 10, and maintaining the flatness of the base plate 60; in addition, it can make the battery device 10 lighter overall.

[0160] According to some embodiments of this application, optionally, the base plate 60 is disposed on the side of the frame 50 away from the cover 11, and there is a gap between it and the support member 90.

[0161] That is, the base plate 60 and the support member 90 are spaced apart, so that there is also a gap between the battery cell 20 and the base plate 60.

[0162] In this embodiment, the base plate 60 is disposed on the side of the frame 50 away from the cover 11 and spaced apart from the support member 90, so that the battery cell 20 can be supported by the support member 90 or the frame 50, thereby reducing the load on the battery cell 20 by the base plate 60, reducing the wear on the base plate 60, and thus improving the performance of the battery device 10.

[0163] According to some embodiments of this application, optionally, the support member 90 has a flow channel for a heat exchange medium to pass through, the heat exchange medium being used to regulate the temperature of the battery cell assembly 70.

[0164] It should be understood that the support member 90 is provided with flow channels for the flow of heat exchange medium, that is, the support member 90 is a hollow structure with good tensile strength, which can more effectively disperse and unload the expansion force generated by the battery cell 20. In addition, integrating the temperature regulation function into the support member 90 can save the space of setting up a separate temperature regulation system, making the battery device 10 more compact and improving the energy density of the battery device 10.

[0165] In this embodiment, the support member 90 has a flow channel for the heat exchange medium to pass through. The heat exchange medium is used to regulate the temperature of the battery cell assembly 70, which can not only resist the expansion force generated by the battery cell 20, but also quickly transfer the heat generated by the battery cell 20, thereby achieving the dual functions of support and heat dissipation. Secondly, this design reduces the number of components in the battery device 10, making the battery device 10 lighter overall. In addition, it can also optimize the internal space layout of the battery device 10, thereby providing more usable space for the battery device 10 and improving the energy density of the battery device 10.

[0166] According to some embodiments of this application, the end plate 80 may optionally be bonded to the battery cell 20.

[0167] It should be understood that the bonding between the end plate 80 and the battery cell 20 can be interpreted as the first crossbeam 810 and the second crossbeam 811 being connected to the battery cell 20 near the first crossbeam 810 and the second crossbeam 811 by bonding. Alternatively, it can be described as the first crossbeam 810 and the second crossbeam 811 being connected to the first wall 21 of the battery cell 20 near the first crossbeam 810 and the second crossbeam 811 by bonding. It can also be understood that the connecting plate is connected to the battery cell 20 near the connecting plate by bonding.

[0168] It should also be understood that the battery cells 20 near the first crossbeam 810 and the second crossbeam 811 can also be connected by other means, such as thermal bonding, etc., and this application does not limit this in any way.

[0169] In this embodiment, the end plate 80 is connected to the battery cell 20 by adhesive bonding, which can improve the overall stability of the battery device 10. At the same time, by bonding the end plate 80 to the battery cell 20, the expansion force generated by the battery cell 20 can be better transmitted.

[0170] According to some embodiments of this application, the support beam 82 may optionally be a fastener.

[0171] It should be understood that the support beam 82 is a fastener. The support beam 82 can be directly machined with threaded holes, slots, or locking mechanisms to fix the base plate 60 or cover 11 via the beam itself. For example, the aluminum alloy support beam 82 can be a bolt, directly fastening the base plate 60 or cover 11 via a sliding nut. Alternatively, the support beam 82 can also achieve fastening through its shape or material properties (such as elastic clamping or interference fit), replacing traditional screws, adhesives, etc., to fix it to the base plate 60 or cover 11. For example, the plastic support beam 82 has elastic clips that can be directly pressed into the holes of the base plate 60 or cover 11 for locking connection.

[0172] In this embodiment, the support beam 82 is a fastener, which facilitates the connection between the support beam 82 and the base plate 60 or the cover 11, thereby enabling rapid assembly.

[0173] According to some embodiments of this application, the end plate 80 may optionally be made of steel.

[0174] It should be understood that the end plate 80 can also be made of other materials, such as aluminum or other non-metallic materials, and this application does not impose any restrictions on this.

[0175] In this embodiment, the end plate 80 is made of steel, which has high yield strength and tensile strength, effectively withstanding the expansion force generated by the battery cell 20 during charging and discharging, reducing the deformation or damage of the end plate 80 due to excessive force. The high rigidity of steel enables the end plate 80 to maintain its shape stability when subjected to expansion force, thereby improving the overall stability of the battery device 10.

[0176] According to some embodiments of this application, optionally, it can be combined with Figures 2 to 9 As described, on the third direction Z, the end plate 80 and the cover 11 are provided with a gap.

[0177] It should be understood that, on the third direction Z, there is a gap between the two ends of the end plate 80 and the cover 11. Since the end plate 80 is bonded to the battery cell 20, the gap between the two ends of the end plate 80 and the cover 11 facilitates the installation of the battery cell assembly 70 and the end plate 80.

[0178] It should also be understood that the above can also be described as follows: on the third direction Z, there is a gap between the two ends of the end plate 80 and the frame 50. Since the end plate 80 is bonded to the battery cell 20, the gap between the two ends of the end plate 80 and the frame 50 facilitates the installation of the battery cell assembly 70 and the end plate 80.

[0179] Furthermore, the cover 11 and the base plate 60 can be made of plastic or metal. For example, the cover 11 and the base plate 60 can be made of plastic, thereby achieving a lightweight design for the battery device 10. It should be understood that the cover 11 and the base plate 60 can also be made of other materials, such as metal or composite materials. For example, the cover 11 and / or the base plate 60 can also be sheet metal, thereby improving the structural strength of the battery device 10.

[0180] In this embodiment, the cover 11 and the frame 50 are connected by adhesive bonding or thermal fusion; and / or, the base plate 60 and the frame 50 are connected by adhesive bonding or thermal fusion. This improves the connection strength between the two components and allows for quick replacement of the faulty component without damaging other components in the event of a failure in one component. This improves the utilization rate of the battery device 10 and further enhances its performance. Furthermore, adhesive bonding or thermal fusion enables sealing between the cover 11 and the frame 50, and between the base plate 60 and the frame 50, without the need for additional structures such as sealing rings. This improves the sealing performance of the battery device 10 and simplifies its structure.

[0181] This application embodiment also provides an electrical device, including the battery device 10 in any of the above embodiments, the battery device 10 being used to provide electrical energy to the electrical device. Specifically, the electrical device can be the above... Figure 1The vehicle 1 shown can also be any electrical device that uses the battery device 10.

[0182] In some implementations, the electrical equipment can be a vehicle, a ship, or a spacecraft.

[0183] According to some embodiments of this application, see Figures 2 to 9 This application provides a battery device 10, including a housing 12, a plurality of battery cell assemblies 70, and an end plate 80. The housing 12 forms an accommodating space and has a bottom plate 60. The plurality of battery cell assemblies 70 are accommodated in the accommodating space and are arranged along a first direction X. Each battery cell assembly 70 includes a plurality of battery cells 20 arranged along a second direction Y. The end plate 80 is accommodated in the accommodating space and abuts against at least one end of the plurality of battery cell assemblies 70 along the second direction Y. The end plate 80 includes a plurality of support beams 82 extending along a third direction Z and spaced apart along the first direction X. The bottom plate 60 of the housing 12 includes a plurality of first through holes 61 spaced apart along the first direction X. The plurality of support beams 82 pass through the plurality of first through holes 61 and are connected to the bottom plate 60. The first direction X, the second direction Y, and the third direction Z are mutually perpendicular. The base plate 60 includes a plurality of first through holes 61 spaced apart along a first direction X. A plurality of support beams 82 pass through the plurality of first through holes 61 and are connected to the base plate 60. Compared to inserting the support beams 82 into blind holes in the base plate 60 and connecting them, this method provides weaker mechanical support, especially in scenarios requiring high stress or vibration, and cannot provide sufficient stability. In this application, however, by having multiple support beams 82 pass through the plurality of first through holes 61 and connect them to the base plate 60, stronger mechanical support and higher mechanical stability are provided, thereby improving the performance of the battery device 10. Secondly, when the housing 12 is subjected to vibration or external impact, the connection point between the support beams 82 and the base plate 60 through the first through holes 61 is less likely to loosen or detach, thus improving the reliability of the connection. Furthermore, the connection of the support beams 82 to the base plate 60 through the first through holes 61 allows the end plate 80 to better resist expansion forces, thereby improving the safety performance of the battery device 10.

[0184] 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: The box (12) forms a receiving space and has a bottom plate (60); Multiple battery cell assemblies (70) are housed in the housing space, the multiple battery cell assemblies (70) are arranged along a first direction, and each battery cell assembly (70) includes multiple battery cells (20) arranged along a second direction; An end plate (80) is housed in the housing space and abuts against at least one end of a plurality of battery cell assemblies (70) along the second direction. The end plate (80) includes a plurality of support beams (82) extending along a third direction and spaced apart along the first direction. The base plate (60) includes a plurality of first through holes (61) spaced apart along the first direction. A plurality of support beams (82) pass through the plurality of first through holes (61) and are connected to the base plate (60). The first direction, the second direction and the third direction are perpendicular to each other.

2. The battery device according to claim 1, characterized in that, The box has a cover (11) which includes a plurality of second through holes (62) spaced apart along the first direction. A plurality of support beams (82) pass through the second through holes (62) and are connected to the cover (11).

3. The battery device according to claim 2, characterized in that, The end plate (80) further includes a first crossbeam (810), a second crossbeam (811), and a support plate (83). The first crossbeam (810) and the second crossbeam (811) extend along the first direction and are arranged opposite to each other along the third direction. The support plate (83) extends along the third direction and its two ends along the third direction are respectively connected to the first crossbeam (810) and the second crossbeam (811). The support beam (82) passes through the first crossbeam (810) at one end along the third direction and is connected to the cover (11), while the other end passes through the second crossbeam (811) and is connected to the bottom plate (60).

4. The battery device according to claim 3, characterized in that, The support plate (83) includes a first sub-support plate (831) and a second sub-support plate (832) located at both ends of the first crossbeam (810) and the second crossbeam (811) along the first direction, respectively. The first sub-support plate (831) is connected to one end of the first crossbeam (810) and the second crossbeam (811), respectively, and the second sub-support plate (832) is connected to the other end of the first crossbeam (810) and the second crossbeam (811), respectively.

5. The battery device according to claim 4, characterized in that, The first crossbeam (810), the second crossbeam (811), or the support plate (83) includes a first plate (1501) and a second plate (1502). The first plate (1501) is perpendicular to the second direction and abuts against the battery cell (20). The second plate (1502) is connected to the first plate (1501) and is bent relative to the first plate (1501).

6. The battery device according to claim 5, characterized in that, The first crossbeam (810), the second crossbeam (811), or the support plate (83) further includes a third plate (1503), which is connected to the first plate (1501) and bent relative to the first plate (1501). The third plate (1503) is opposite to and spaced apart from the second plate (1502).

7. The battery device according to claim 2, characterized in that, The housing (12) includes: A frame (50) having a first opening and a second opening, the first opening and the second opening being located on opposite sides of the third direction and communicating with each other; The cover (11) is connected to the frame (50) and closes the first opening; The base plate (60) is connected to the frame (50) and closes the second opening. The base plate (60), the frame (50) and the cover (11) together form a receiving space. The end plate (80) is connected to the frame (50) at both ends along the first direction.

8. The battery device according to claim 2, characterized in that, The portion of the cover (11) corresponding to the end plate (80) is recessed into the receiving space to form a cover recess (111). A plurality of second through holes (62) are provided in the cover recess (111), and the portion of the support beam (82) passing through the second through holes (62) has a third dimension that is less than or equal to the third dimension of the cover recess (111).

9. The battery device according to any one of claims 1 to 8, characterized in that, The portion of the base plate (60) corresponding to the end plate (80) is recessed into the accommodating space to form a base plate recess (601). A plurality of first through holes (61) are provided in the base plate recess (601), and the portion of the support beam (82) passing through the first through holes (61) has a third dimension that is less than or equal to the third dimension of the base plate recess (601).

10. The battery device according to any one of claims 1 to 8, characterized in that, The end plate (80) abuts against the first wall (21), which is the wall of the battery cell (20) abutting against the end plate (80) with the largest area and close to the end plate (80), and the first wall (21) is perpendicular to the second direction.

11. The battery device according to any one of claims 1 to 8, characterized in that, The end plate (80) is made of steel.

12. The battery device according to any one of claims 1 to 8, characterized in that, The support beam (82) is a fastener.

13. An electrical appliance, characterized in that, The battery device includes any one of claims 1 to 12, wherein the battery device provides electrical energy to the electrical device.

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