Battery device, energy storage device, energy storage system, and charging network

Abstract

A battery device, an energy storage device, an energy storage system, and a charging network. The battery device comprises: a plurality of battery cell assemblies arranged in a first direction, wherein each of the plurality of battery cell assemblies comprises a plurality of battery cells arranged in a second direction, and the first direction is perpendicular to the second direction; a first busbar component set, which comprises a plurality of busbar components, wherein each busbar component in the first busbar component set is configured to connect to electrode terminals of two adjacent battery cells in the second direction; and a second busbar component set, which comprises a plurality of busbar components, wherein each busbar component in the second busbar component set is configured to connect to electrode terminals of two adjacent battery cells in the first direction. The battery device, the energy storage device, the energy storage system and the charging network in the embodiments in the present application can improve the structural stability of the battery device.

Description

Battery devices, energy storage devices, energy storage systems and charging networks Cross-references to related applications

[0001] This application claims priority to Chinese patent application CN 202510111699.7, filed on January 23, 2025, entitled “Battery Device, Energy Storage Device, Energy Storage System and Charging Network”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of batteries, and more specifically, to a battery device, an energy storage device, an energy storage system, and a charging network. Background Technology

[0003] 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.

[0004] When there are a large number of battery cells inside the battery device, misalignment may occur between the battery cells under mechanical conditions such as vibration, impact, and hoisting, which may lead to structural failure of the battery device. Summary of the Invention

[0005] This application provides a battery device, an energy storage device, an energy storage system, and a charging network, which can improve the structural stability of the battery device.

[0006] In a first aspect, a battery device is provided, comprising: a plurality of battery cell assemblies arranged along a first direction, each of the plurality of battery cell assemblies including a plurality of battery cells arranged along a second direction, the first direction being perpendicular to the second direction; a first busbar assembly including a plurality of busbars, each of the first busbars assembly being used to connect electrode terminals of two adjacent battery cells along the second direction; and a second busbar assembly including a plurality of busbars, each of the second busbars assembly being used to connect electrode terminals of two adjacent battery cells along the first direction.

[0007] Therefore, the battery device in this application embodiment simultaneously provides busbar components for connecting the electrode terminals of battery cells in different directions. The stability between multiple battery cells distributed along the second direction can be increased by the busbar components in the first busbar component set, and the stability between multiple battery cells distributed along the first direction can be increased by the busbar components in the second busbar component set, reducing misalignment or torsion between multiple battery cells in different directions. Furthermore, compared to a solution that only provides busbar components for connecting the electrode terminals of multiple battery cells in a single direction and uses pressure bars to increase stability, the busbar components in the first and second busbar component sets of this application embodiment can replace the function of pressure bars. On the one hand, this improves the structural stability of the battery device, reducing the risk of structural failure in mechanical conditions such as vibration, impact, and hoisting. On the other hand, omitting the pressure bar structure reduces costs and improves the utilization rate of the internal space of the battery device.

[0008] In some embodiments, the plurality of battery cell assemblies includes a first battery cell assembly, which includes adjacent first and second battery cells, and the first busbar assembly includes a first busbar for connecting the electrode terminals of the first battery cell and the electrode terminals of the second battery cell with opposite polarities, so as to achieve a series connection between the first and second battery cells.

[0009] In some embodiments, the plurality of battery cell assemblies further includes a second battery cell assembly adjacent to the first battery cell assembly, the second battery cell assembly including a third battery cell adjacent to the first battery cell, the second bus assembly including a second bus for connecting the electrode terminals of the first battery cell and the third battery cell with opposite polarities, to achieve a series connection between the first battery cell and the third battery cell.

[0010] In some embodiments, the electrode terminals of the first battery cell connected to the first busbar are opposite in polarity to the electrode terminals of the first battery cell connected to the second busbar, so as to achieve a series connection between the first battery cell, the second battery cell and the third battery cell.

[0011] In some embodiments, the plurality of battery cell assemblies further includes a third battery cell assembly adjacent to the second battery cell assembly, the second battery cell assembly being located between the first battery cell assembly and the third battery cell assembly, the third battery cell assembly including a fourth battery cell adjacent to the third battery cell, and the second bus assembly further including a third bus assembly for connecting the electrode terminals of the third battery cell and the fourth battery cell with opposite polarities, to achieve a series connection between the third battery cell and the fourth battery cell.

[0012] In some embodiments, the third battery cell is connected to the electrode terminal of the second busbar with opposite polarity to the electrode terminal of the third battery cell connected to the third busbar, so as to achieve a series connection between the first battery cell, the third battery cell and the fourth battery cell.

[0013] In some embodiments, the first wall of each of the plurality of battery cells includes two electrode terminals with opposite polarities arranged along the first direction. The first wall is perpendicular to a third direction, which is perpendicular to both the first and second directions. The first and second busbar assembly are disposed toward the first wall of the plurality of battery cells. This facilitates the connection of the electrode terminals of the individual battery cells to achieve electrical connection between the multiple battery cells, thereby improving the processing efficiency of the battery device. Furthermore, the various busbars disposed on the same side can balance forces in different directions, reducing stress concentration and thus improving the structural stability of the battery device.

[0014] In some embodiments, each busbar in the first busbar assembly includes: a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion being used to connect the electrode terminals of two adjacent battery cells along the second direction; and a first raised portion, located between the first connecting portion and the second connecting portion along the second direction, the first raised portion bending away from the first connecting portion and the second connecting portion. The first raised portion can be used to absorb deformation of the first busbar caused by misalignment or torsion between the first battery cell and the second battery cell, particularly to absorb tensile deformation of the first busbar along the second direction, reducing the risk of breakage of the first busbar and improving the stability of the first busbar.

[0015] In some embodiments, each of the first busbar components in the first busbar component assembly further includes a first opening that extends along the second direction and passes through the first raised portion. The first opening can reduce stress concentration at the first raised portion, reduce local damage to the first busbar component caused by stress concentration, and improve the structural stability of the first busbar component.

[0016] In some embodiments, the first opening is symmetrically distributed relative to the centerline of the first raised portion perpendicular to the second direction, so as to balance the forces on different areas of the first confluence component and reduce stress concentration.

[0017] In some embodiments, the first opening includes a first main body region, a first extension region, and a second extension region. The first main body region is located between the first extension region and the second extension region. The first main body region extends along the second direction and passes through the first raised portion. The first extension region is located at the first connecting portion, and its extension direction is different from the second direction. The second extension region is located at the second connecting portion, and its extension direction is different from the second direction. By providing the first main body region, the first extension region, and the second extension region, stress concentration in different areas of the first busbar component is effectively reduced, thereby reducing the risk of localized damage or even breakage of the first busbar component and improving its stability.

[0018] In some embodiments, each of the first busbar components in the first busbar component assembly further includes a third opening located at one end of the first raised portion perpendicular to the second direction, such that, in the direction perpendicular to the second direction, the size of the connection between the first connecting portion and the first raised portion is smaller than the size of other areas of the first connecting portion, and the size of the connection between the second connecting portion and the first raised portion is smaller than the size of other areas of the second connecting portion, thereby reducing stress concentration at the connection between the first connecting portion and the first raised portion, and stress concentration at the connection between the second connecting portion and the first raised portion.

[0019] In some embodiments, each busbar in the second busbar assembly includes: a third connecting portion and a fourth connecting portion, the third connecting portion and the fourth connecting portion being used to connect the electrode terminals of two adjacent battery cells along the first direction; and a second raised portion, located between the third connecting portion and the fourth connecting portion along the first direction, the second raised portion bending away from the third connecting portion and the fourth connecting portion. The second raised portion can be used to absorb deformation of the second busbar caused by misalignment or torsion between the first battery cell and the third battery cell, particularly to absorb tensile deformation of the second busbar along the first direction, reducing the risk of breakage of the second busbar and improving the stability of the second busbar.

[0020] In some embodiments, each of the second busbar components in the second busbar component assembly further includes a second opening that extends along the first direction and passes through the second raised portion. The second opening can reduce stress concentration at the second raised portion, reduce local damage to the second busbar component caused by stress concentration, and improve the structural stability of the second busbar component.

[0021] In some embodiments, the second opening is symmetrically distributed relative to the centerline of the second protrusion perpendicular to the first direction, so as to balance the forces on different areas of the second confluence component and reduce stress concentration.

[0022] In some embodiments, the second opening includes a second main body region, a third extension region, and a fourth extension region. The second main body region is located between the third and fourth extension regions, extends along the first direction and passes through the second raised portion, the third extension region is located at the third connecting portion, and the extension direction of the third extension region is different from the first direction. The fourth extension region is located at the fourth connecting portion, and the extension direction of the fourth extension region is different from the first direction. By providing the second main body region, the third extension region, and the fourth extension region, stress concentration in different areas of the second busbar component is effectively reduced, thereby reducing the risk of localized damage or even breakage of the second busbar component and improving its stability.

[0023] In some embodiments, the weight of the battery device ranges from 300 kg to 2 t. The weight of the battery device is typically greater than or equal to 300 kg to increase its capacity; conversely, the weight of the battery device is typically less than or equal to 2 t to facilitate transportation and control costs.

[0024] In some embodiments, along the second direction, the size of each battery cell assembly in the plurality of battery cell assemblies ranges from [1000mm, 3000mm]. The size of each battery cell assembly is typically greater than or equal to 1000mm to increase the number of battery cells, thereby increasing the capacity of the battery device. Furthermore, increasing the size of each battery cell assembly effectively limits misalignment and torsion between battery cells, providing significant advantages in mechanical conditions such as vibration, impact, and hoisting, thus improving the structural stability of the battery device. However, the size of each battery cell assembly typically does not exceed 3000mm, which limits the excessive forces borne by each busbar in mechanical conditions such as vibration, impact, and hoisting, maintaining the stability of the busbar, and also reduces the overall size of the battery device, facilitating transportation.

[0025] In some embodiments, along the first direction, the dimensions of all battery cell assemblies within the battery device range from 700mm to 2000mm. The dimensions of all battery cell assemblies within the battery device are typically greater than or equal to 700mm to increase the number of battery cells and thus improve the capacity of the battery device. Furthermore, by appropriately increasing the dimensions of all battery cell assemblies, the misalignment and torsion between battery cells can be limited by the busbars in the first and second busbar sets, thereby improving the structural stability of the battery device under mechanical conditions such as vibration, impact, and hoisting. However, the dimensions of all battery cell assemblies typically do not exceed 2000mm to reduce the overall size of the battery device and facilitate transportation.

[0026] In a second aspect, an energy storage device is provided, comprising: a plurality of battery devices as described in the first aspect or any embodiment of the first aspect, the battery devices being used to store or provide electrical energy.

[0027] Thirdly, an energy storage system is provided, comprising: a power conversion device and an energy storage device as described in the second aspect, the power conversion device being used to electrically connect a power generation device and the energy storage device.

[0028] Fourthly, a charging network is provided, comprising: a charging pile and an energy storage device as described in the second aspect or an energy storage system as described in the third aspect, the energy storage device being used to provide electrical energy to the charging pile. Attached Figure Description

[0029] Figure 1 is an exploded structural diagram of a battery device according to an embodiment of this application;

[0030] Figure 2 is a schematic diagram of the structure of a battery cell according to an embodiment of this application;

[0031] Figure 3 is a top view of a partial structure of a battery device according to an embodiment of this application;

[0032] Figure 4 is a top view of another partial structure of a battery device according to an embodiment of this application;

[0033] Figure 5 is a top view of a partial structure of a battery device according to another embodiment of this application;

[0034] Figure 6 is a top view of another partial structure of a battery device according to another embodiment of this application;

[0035] Figure 7 is a schematic diagram of the structure of any one of the busbar components in the first busbar component set according to an embodiment of this application;

[0036] Figure 8 is a top view of any one of the busbar components in the first busbar component set according to an embodiment of this application;

[0037] Figure 9 is a schematic diagram of the structure of any one of the busbar components in the second busbar component set according to an embodiment of this application;

[0038] Figure 10 is a top view of any one of the busbar components in a second busbar component set according to an embodiment of this application;

[0039] Figure 11 is a structural block diagram of an energy storage system according to an embodiment of this application;

[0040] Figure 12 is a structural block diagram of a charging network according to an embodiment of this application.

[0041] The accompanying drawings are not drawn to scale. Detailed Implementation

[0042] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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).

[0050] 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.

[0051] 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.

[0052] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0053] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0054] 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.

[0055] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0056] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0057] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0058] To increase the energy density of a battery device, the number of individual battery cells within the device can be increased. When each battery cell assembly contains a large number of cells, additional pressure strips are typically used to secure multiple cells and reduce the risk of failure due to vibration, impact, hoisting, and other mechanical conditions, thus improving structural stability. However, adding pressure strips to battery cell assemblies is costly and requires adhesive application, significantly increasing labor time and costs. Furthermore, the pressure strips occupy internal space within the battery device, hindering space utilization and consequently affecting the energy density of the battery.

[0059] Therefore, embodiments of this application provide a battery device, an energy storage device, an energy storage system, and a charging network that can solve the above-mentioned problems. The battery device of this application includes a plurality of battery cell assemblies arranged along a first direction, and each battery cell assembly includes a plurality of battery cells arranged along a second direction, the first direction being perpendicular to the second direction. The battery device also includes a first busbar assembly and a second busbar assembly. The busbars in the first busbar assembly are used to connect the electrode terminals of two adjacent battery cells along the second direction, and the busbars in the second busbar assembly are used to connect the electrode terminals of two adjacent battery cells along the first direction. The battery device simultaneously provides busbars for connecting the electrode terminals of battery cells in different directions. The stability between the plurality of battery cells distributed along the second direction can be increased by the busbars in the first busbar assembly, and the stability between the plurality of battery cells distributed along the first direction can be increased by the busbars in the second busbar assembly, reducing misalignment or torsion between the plurality of battery cells in different directions. Furthermore, compared to a solution that only sets up a busbar for connecting the electrode terminals of multiple battery cells in a single direction and increases stability through a pressure bar, the busbars in the first and second busbar sets of this application embodiment can replace the function of the pressure bar. On the one hand, this improves the structural stability of the battery device and reduces the risk of structural failure of the battery device under mechanical conditions such as vibration, impact, and hoisting. On the other hand, omitting the pressure bar structure can reduce costs and improve the utilization rate of the internal space of the battery device.

[0060] Figure 1 shows a partial structural schematic diagram of the battery device 10 according to an embodiment of this application. As shown in Figure 1, the battery device 10 according to an embodiment of this application may include a plurality of battery cells 20. For example, this embodiment of the application mainly takes the battery device 10 as including a plurality of battery cell assemblies 200, each battery cell assembly 200 including a plurality of battery cells 20, to meet different power usage needs.

[0061] It should be understood that, as shown in FIG. 1, the battery device 10 of this embodiment may further include a housing 15, which can be used to accommodate multiple battery cell assemblies 200. The housing 15 of this embodiment has a hollow internal structure, and the multiple battery cell assemblies 200 are accommodated within the housing 15. The housing 15 may include two parts, referred to herein as a first housing portion 151 and a second housing portion 152, which are fastened together. The shapes of the first housing portion 151 and the second housing portion 152 may be determined according to the shape of the components housed inside, for example, according to the shape of the combination of the multiple battery cell assemblies 200 housed inside. At least one of the first housing portion 151 and the second housing portion 152 has an opening. For example, as shown in Figure 1, the first box portion 151 and the second box portion 152 can both be hollow cuboids with one face as an opening. The openings of the first box portion 151 and the second box portion 152 are arranged opposite to each other, and the first box portion 151 and the second box portion 152 are interlocked to form a box 15 with a closed chamber, which can be used to accommodate multiple battery cell assemblies 200.

[0062] For example, unlike what is shown in Figure 1, the first housing portion 151 and the second housing portion 152 may each have only one hollow cuboid with an opening, while the other is plate-shaped to cover the opening. Taking the second housing portion 152 as a hollow cuboid with one opening, and the first housing portion 151 as a plate-shaped example, then the first housing portion 151 covers the opening of the second housing portion 152 to form a housing 15 with a closed chamber, which can be used to accommodate multiple battery cell assemblies 200.

[0063] As an example, "closed" here refers to covering or closing, which can be either sealed or unsealed.

[0064] As an example, the housing 15 may also include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 15 forms an enclosed space to house the battery cell assembly 200.

[0065] In some embodiments, the shape of the battery device 10 in this application can be set according to actual applications. For example, this application mainly uses a cuboid battery device 10 as an example. In addition, for the sake of ease of description, this application defines three reference directions for the cuboid battery device 10. The length direction of the battery device 10 is direction Y, the width direction of the battery device 10 is direction X, and the height direction of the battery device 10 is direction Z. The length direction Y, the width direction X, and the height direction Z of the battery device 10 are perpendicular to each other, and the dimension of the width direction X of the battery device 10 is smaller than the dimension of the length direction Y.

[0066] In some embodiments, the housing 15 may be part of the vehicle's chassis structure. For example, a portion of the housing 15 may be at least a portion of the vehicle's floor, or a portion of the housing 15 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0067] Figure 2 shows a schematic diagram of the structure of a battery cell 20 according to an embodiment of this application. For example, the battery cell 20 can be any battery cell assembly 200 included in the battery device 10. In some embodiments, as shown in Figure 2, the battery cell 20 can include a housing 202. The housing 202 can be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing 202), or an aluminum-plastic film, etc.

[0068] In some embodiments, the housing 202 can be a sealed structure or a non-sealed structure. As an example, when the housing 202 is a non-sealed structure, it serves to protect the internal electrode assembly, and a sealing bag is included between the housing 202 and the electrode assembly. The sealing bag is used to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film. When the housing 202 is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0069] As an example, the battery cell 20 can be a cylindrical battery cell 20, a prismatic battery cell 20, a pouch battery cell 20, or a battery cell 20 of other shapes. The prismatic battery cell 20 includes a prismatic battery cell 20, a blade-shaped battery cell 20, and a multi-prismatic battery, such as a hexagonal prismatic battery, etc. There are no particular limitations in this application. For ease of explanation, the embodiments of this application mainly use the rectangular battery cell 20 shown in Figure 2 as an example.

[0070] In some embodiments, the housing 202 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 be provided one or more.

[0071] In some embodiments, at least one electrode terminal 2011 is provided on the housing 202, and the electrode terminal 2011 is electrically connected to the tab. The electrode terminal 2011 can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. Specifically, the battery cell 20 of this application embodiment may include at least one positive electrode terminal 20111 and / or at least one negative electrode terminal 20112, whereby the positive electrode terminal 20111 is used to connect to the positive tab, and the negative electrode terminal 20112 is used to connect to the negative tab.

[0072] In some embodiments, the housing 202 may also replace the electrode terminal 2011 as an electrode of the battery cell 20. For example, the battery cell 20 may only include the positive electrode terminal 20111, in which case the housing 202 may replace the negative electrode terminal 20112 to output electrical energy; or, the battery cell 20 may only include the negative electrode terminal 20112, in which case the housing 202 may replace the positive electrode terminal 20111 to output electrical energy. For ease of explanation, the embodiments of this application mainly take the battery cell 20 including both the positive electrode terminal 20111 and the negative electrode terminal 20112 as an example. For embodiments where the housing 202 is used as an electrode, the housing 202 is applicable to the relevant descriptions of the positive electrode terminal 20111 or the negative electrode terminal 20112 below, to connect with the corresponding busbar component and realize the electrical connection between multiple battery cells 20.

[0073] Figure 3 shows a top view of a partial structure of the battery device 10 according to an embodiment of the present application, and Figure 4 shows a top view of another partial structure of the battery device 10 according to an embodiment of the present application. For example, Figure 4 can be a partial enlarged view of region A in Figure 3.

[0074] In this embodiment, the battery device 10 includes a plurality of battery cell assemblies 200 arranged along a first direction, a first busbar assembly 11, and a second busbar assembly 12. Specifically, each of the plurality of battery cell assemblies 200 includes a plurality of battery cells 20 arranged along a second direction, the first direction being perpendicular to the second direction; the first busbar assembly 11 includes a plurality of busbars, each of which is used to connect the electrode terminals 2011 of two adjacent battery cells 20 along the second direction; the second busbar assembly 12 includes a plurality of busbars, each of which is used to connect the electrode terminals 2011 of two adjacent battery cells 20 along the first direction.

[0075] It should be understood that the battery device 10 of this application embodiment includes a plurality of battery cell assemblies 200 arranged along a first direction, and the number of the plurality of battery cell assemblies 200 can be set according to actual application. For example, as shown in FIG3 and FIG4, taking the first direction as the width direction X of the battery device 10 as an example, the battery device 10 may be provided with four battery cell assemblies 200 arranged along the width direction X.

[0076] In the embodiments of this application, each of the multiple battery cell assemblies 200 includes a plurality of battery cells 20 arranged along a second direction. The number of battery cells 20 included in each battery cell assembly 200 can be set according to actual applications, and the number of battery cells 20 included in different battery cell assemblies 200 can be the same or different. For example, as shown in Figures 3 and 4, taking the second direction as the length direction Y of the battery device 10 as an example, each battery cell assembly 200 can be provided with a plurality of battery cells 20 arranged along the length direction Y, and the number of battery cells 20 included in each battery cell assembly 200 in the battery device 10 is the same, so as to facilitate processing and assembly.

[0077] In this embodiment, the first busbar assembly 11 includes multiple busbars, and each busbar in the first busbar assembly 11 is used to connect the electrode terminals 2011 of two adjacent battery cells 20 along the second direction. That is, the busbars in the first busbar assembly 11 are used to realize the electrical connection between battery cells 20 belonging to the same battery cell assembly 200. For example, taking FIG5 as an example, the first busbar assembly 11 in this embodiment may include four columns of busbars, namely a column of busbars on the left, a column of busbars on the right, and two columns of busbars in the middle. Each busbar in the first busbar assembly 11 is used to connect two adjacent battery cells belonging to the same battery cell assembly 200. Therefore, the busbars in the first busbar assembly 11 can be used to limit the relative misalignment or torsion between battery cells 20 within the same battery cell assembly 200, thereby improving the stability of each battery cell assembly 200.

[0078] The second busbar assembly 12 of this application embodiment includes multiple busbars, and each busbar in the second busbar assembly 12 is used to connect the electrode terminals 2011 of two adjacent battery cells 20 along the first direction. That is, the busbars in the second busbar assembly 12 are used to realize the electrical connection of battery cells 20 that belong to different battery cell assemblies 200 but are arranged adjacently. For example, taking FIG5 as an example, the second busbar assembly 12 of this application embodiment may include two columns of busbars, namely a column of busbars between the two battery cell assemblies 200 on the left and a column of busbars between the two battery cell assemblies 200 on the right. Each busbar in the second busbar assembly 12 is used to connect battery cells 20 that belong to different battery cell assemblies 200 but are adjacent along the first direction. Therefore, the busbars of the second busbar assembly 12 can be used to limit the relative misalignment or torsion between different battery cell assemblies 200, thereby improving the stability of multiple battery cell assemblies 200.

[0079] Therefore, compared to the scheme that only provides a busbar component for connecting multiple battery cells 20 in a single direction and increases stability by using a pressure bar, the busbar component in the first busbar component set 11 and the second busbar component set 12 of this application embodiment can replace the function of the pressure bar. On the one hand, it can restrict the misalignment and torsion between battery cells 20 in multiple directions to improve the structural stability of the battery device 10 and reduce the risk of structural failure of the battery device 10 in mechanical conditions such as vibration, impact, and hoisting. On the other hand, omitting the pressure bar structure can reduce costs and improve the utilization rate of the internal space of the battery device 10.

[0080] It should be understood that the busbars in the first busbar assembly 11 and the second busbar assembly 12 of this application embodiment can all achieve electrical connection between multiple battery cells 20 by connecting the electrode terminals 2011 of the corresponding battery cells 20. Where a battery cell 20 in this application embodiment includes multiple electrode terminals 2011, these multiple electrode terminals 2011 can be located on the same wall or different walls, and each electrode terminal 2011 can be located at any position on the housing 202. For example, if the electrode terminals 2011 of the battery cells 20 are located on the same wall, the busbars included in the first busbar assembly 11 and the busbars included in the second busbar assembly 12 can be disposed on the same side of the multiple battery cell assemblies 200; conversely, if different electrode terminals 2011 of the battery cells 20 are located on different walls, the busbars included in the first busbar assembly 11 and the busbars included in the second busbar assembly 12 can be located at different positions on the multiple battery cell assemblies 200. This application embodiment is not limited to this.

[0081] In some embodiments, the first wall 201 of each of the plurality of battery cells 20 includes two electrode terminals 2011 with opposite polarities arranged along a first direction. The first wall 201 is perpendicular to a third direction, which is perpendicular to both the first and second directions. A first busbar assembly 11 and a second busbar assembly 12 are disposed toward the first wall 201 of the plurality of battery cells 20. For example, as shown in Figures 3 and 4, taking the third direction as the height direction Z of the battery device 10, the first wall 201 is a surface perpendicular to the height direction Z. In this embodiment, the first wall 201 is provided with at least two electrode terminals 2011 with opposite polarities. The busbars included in the first busbar assembly 11 and the busbars included in the second busbar assembly 12 are all disposed toward the first wall 201 of each battery cell 20 to be electrically connected to the electrode terminals 2011 disposed on the first wall 201.

[0082] By placing the current-connecting components included in the first current-connecting component assembly 11 and the current-connecting components included in the second current-connecting component assembly 12 on the same side of the multiple battery cell assemblies 200, it is convenient to connect the electrode terminals 2011 of each battery cell 20 to realize the electrical connection between the multiple battery cells 20 and improve the processing efficiency of the battery device 10. On the other hand, the current-connecting components arranged on the same side can balance the forces in different directions, reduce stress concentration, and thus improve the structural stability of the battery device 10.

[0083] It should be understood that the busbars included in the first busbar assembly 11 and the busbars included in the second busbar assembly 12 of this application embodiment can be used to realize the series and / or parallel connection between multiple battery cells 20 to meet different needs of the battery device 10.

[0084] In some embodiments, the plurality of battery cell assemblies 200 include a first battery cell assembly 210, which includes adjacent first battery cells 21 and second battery cells 22. The first busbar assembly 11 includes a first busbar 111, which is used to connect the electrode terminals 2011 of the first battery cells 21 and the electrode terminals 2011 of the second battery cells 22 with opposite polarities. As shown in Figures 3 and 4, the first battery cell assembly 210 can be any one of the battery cell assemblies 200 in the battery device 10. For example, in Figure 4, the first battery cell assembly 200 on the left is taken as the first battery cell assembly 210. The adjacent first battery cells 21 and second battery cells 22 are any two adjacent battery cells 20 in the first battery cell assembly 210. For example, in Figure 4, the two adjacent battery cells 20 in region A are taken as the first battery cell 21 and the second battery cell 22.

[0085] The first busbar 111 can connect the electrode terminals 2011 of the first battery cell 21 and the electrode terminals 2011 of the second battery cell 22 with opposite polarities. For example, the first busbar 111 can connect the positive electrode terminal 20111 of the first battery cell 21 and the negative electrode terminal 20112 of the second battery cell 22, or the first busbar 111 can connect the negative electrode terminal 20112 of the first battery cell 21 and the positive electrode terminal 20111 of the second battery cell 22 to realize the series connection between the first battery cell 21 and the second battery cell 22.

[0086] Conversely, the first busbar 111 can also be used to connect the electrode terminals 2011 of the first battery cell 21 and the electrode terminals 2011 of the second battery cell 22, which have the same polarity. For example, the first busbar 111 can connect the positive electrode terminal 20111 of the first battery cell 21 and the positive electrode terminal 20111 of the second battery cell 22, or the first busbar 111 can connect the negative electrode terminal 20112 of the first battery cell 21 and the negative electrode terminal 20112 of the second battery cell 22, so as to realize the parallel connection between the first battery cell 21 and the second battery cell 22.

[0087] In some embodiments, the plurality of battery cell assemblies 200 further include a second battery cell assembly 220 adjacent to the first battery cell assembly 210. The second battery cell assembly 220 includes a third battery cell 23 adjacent to the first battery cell 21. The second busbar assembly 12 includes a second busbar 121, which is used to connect the electrode terminals 2011 of the first battery cell 21 and the electrode terminals 2011 of the third battery cell 23 with opposite polarities. As shown in Figures 3 and 4, the second battery cell assembly 220 can be any one of the battery cell assemblies 200 adjacent to the first battery cell assembly 210 in the battery device 10. For example, in Figure 4, a battery cell assembly 200 located to the right of the first battery cell assembly 210 is taken as the second battery cell assembly 220. Correspondingly, the battery cell 20 adjacent to the first battery cell 21 along the first direction in the second battery cell assembly 220 is the third battery cell 23.

[0088] The second busbar assembly 121 in the second busbar assembly 12 can connect the electrode terminals 2011 of the first battery cell 21 and the third battery cell 23 with opposite polarities. For example, the second busbar 121 can connect the positive electrode terminal 20111 of the first battery cell 21 and the negative electrode terminal 20112 of the third battery cell 23, or the second busbar 121 can connect the negative electrode terminal 20112 of the first battery cell 21 and the positive electrode terminal 20111 of the third battery cell 23 to realize the series connection between the first battery cell 21 and the third battery cell 23.

[0089] Conversely, the second busbar 121 in the second busbar assembly 12 can also be used to connect the electrode terminals 2011 of the first battery cell 21 and the third battery cell 23, which have the same polarity. For example, the second busbar 121 can connect the positive electrode terminal 20111 of the first battery cell 21 and the positive electrode terminal 20111 of the third battery cell 23, or the second busbar 121 can connect the negative electrode terminal 20112 of the first battery cell 21 and the negative electrode terminal 20112 of the third battery cell 23, so as to realize the parallel connection between the first battery cell 21 and the third battery cell 23.

[0090] In some embodiments, the first battery cell 21 is connected to the electrode terminal 2011 of the first busbar 111 with opposite polarity to the electrode terminal 2011 of the second busbar 121. For example, as shown in Figures 3 and 4, if the first busbar 111 is connected to the positive electrode terminal 20111 of the first battery cell 21, then the second busbar 121 is connected to the negative electrode terminal 20112 of the first battery cell 21; conversely, if the first busbar 111 is connected to the negative electrode terminal 20112 of the first battery cell 21, then the second busbar 121 is connected to the positive electrode terminal 20111 of the first battery cell 21, thereby enabling the first battery cell 21 to be connected in series with other battery cells 20 through the first busbar 111 and the second busbar 121. For example, if the first busbar 111 is connected to the electrode terminals 2011 of the first battery cell 21 and the second battery cell 22 with opposite polarities, and the second busbar 121 is connected to the electrode terminals 2011 of the first battery cell 21 and the third battery cell 23 with opposite polarities, then a series connection between the first battery cell 21, the second battery cell 22 and the third battery cell 23 can be achieved when the first busbar 111 and the second busbar 121 are respectively connected to the electrode terminals 2011 of the first battery cell 21 with opposite polarities.

[0091] Conversely, the electrode terminal 2011 of the first battery cell 21 connected to the first busbar 111 can have the same polarity as the electrode terminal 2011 of the first battery cell 21 connected to the second busbar 121, or they can be the same electrode terminal 2011. For example, the first busbar 111 and the second busbar 121 can both be connected to the positive electrode terminal 20111 of the first battery cell 21, or both can be connected to the negative electrode terminal 20112 of the first battery cell 21, so as to realize the mixed connection between the first battery cell 21 and other battery cells 20. For example, if the first busbar 111 is connected to the electrode terminals 2011 of the first battery cell 21 and the second battery cell 22 with opposite polarities, and the second busbar 121 is connected to the electrode terminals 2011 of the first battery cell 21 and the third battery cell 23 with opposite polarities, then when the first busbar 111 and the second busbar 121 are connected to the electrode terminals 2011 of the first battery cell 21 with the same polarity, parallel connection between the second battery cell 22 and the third battery cell 23, as well as series connection between the two and the first battery cell 21, can be realized.

[0092] For ease of explanation, the embodiments of this application are mainly illustrated by taking the series connection between battery cells 20 in the battery device 10 through the busbars included in the first busbar assembly 11 and the busbars included in the second busbar assembly 12 as an example.

[0093] It should be understood that the busbars in the second busbar assembly 12 in this application embodiment can be used to connect the battery cells 20 of different battery cell assemblies 200. When the battery device 10 includes at least three battery cell assemblies 200, the electrical connection between the battery cells 20 in the plurality of battery cell assemblies 200 can be achieved in a variety of ways.

[0094] In some embodiments, when the battery device 10 includes at least three battery cell assemblies 200, a busbar from the second busbar set 12 can be provided between every two adjacent battery cell assemblies 200. For example, as shown in Figures 3 and 4, taking the battery device 10 as an example that includes four battery cell assemblies 200, the two battery cell assemblies 200 on the left can be electrically connected through the busbar from the second busbar set 12, and the two battery cell assemblies 200 on the right can be electrically connected through the busbar from the second busbar set 12.

[0095] In some embodiments, when the battery device 10 includes at least three battery cell assemblies 200, unlike the connection methods shown in FIG3 and FIG4, a busbar in the second busbar assembly 12 can be provided between at least three adjacent battery cell assemblies 200 to connect more battery cell assemblies 200.

[0096] Figure 5 shows a top view of a partial structure of a battery device 10 according to another embodiment of the present application, and Figure 6 shows a top view of another partial structure of a battery device 10 according to another embodiment of the present application. For example, Figure 6 can be a partial enlarged view of region B in Figure 5.

[0097] In some embodiments, as shown in Figures 5 and 6, taking the battery device 10 as an example, which includes four battery cell assemblies 200, the four battery cell assemblies 200 can be electrically connected to each other through the busbar in the second busbar assembly 12.

[0098] In some embodiments, the plurality of battery cell assemblies 200 further includes a third battery cell assembly 230 adjacent to the second battery cell assembly 220. The second battery cell assembly 220 is located between the first battery cell assembly 210 and the third battery cell assembly 230. The third battery cell assembly 230 includes a fourth battery cell 24 adjacent to the third battery cell 23. The second busbar assembly 12 further includes a third busbar 122 for connecting the electrode terminals 2011 of the third battery cell 23 and the electrode terminals 2011 of the fourth battery cell 24, which have opposite polarities. As shown in Figures 5 and 6, the third battery cell assembly 230 can be a battery cell assembly 200 adjacent to the second battery cell assembly 220 in the battery device 10. Furthermore, the first battery cell assembly 210, the second battery cell assembly 220, and the third battery cell assembly 230 are arranged adjacent to each other along a first direction, with the second battery cell assembly 220 located between the first battery cell assembly 210 and the third battery cell assembly 230. For example, in Figure 6, a battery cell assembly 200 located to the right of the second battery cell assembly 220 is taken as the third battery cell assembly 230; correspondingly, the battery cell 20 adjacent to the third battery cell 23 along the first direction in the third battery cell assembly 230 is the fourth battery cell 24.

[0099] The third busbar 122 in the second busbar assembly 12 can connect the electrode terminals 2011 of the third battery cell 23 and the fourth battery cell 24, which have opposite polarities. For example, the third busbar 122 can connect the positive electrode terminal 20111 of the third battery cell 23 and the negative electrode terminal 20112 of the fourth battery cell 24, or the third busbar 122 can connect the negative electrode terminal 20112 of the third battery cell 23 and the positive electrode terminal 20111 of the fourth battery cell 24, so as to realize the series connection between the third battery cell 23 and the fourth battery cell 24.

[0100] Conversely, the third busbar 122 in the second busbar assembly 12 can also be used to connect the electrode terminals 2011 of the third battery cell 23 and the fourth battery cell 24, which have the same polarity. For example, the third busbar 122 can connect the positive electrode terminal 20111 of the third battery cell 23 and the positive electrode terminal 20111 of the fourth battery cell 24, or the third busbar 122 can connect the negative electrode terminal 20112 of the third battery cell 23 and the negative electrode terminal 20112 of the fourth battery cell 24, so as to realize the parallel connection between the third battery cell 23 and the fourth battery cell 24.

[0101] In some embodiments, the third battery cell 23 is connected to the electrode terminal 2011 of the second busbar 121 with opposite polarity to the electrode terminal 2011 of the third battery cell 23 connected to the third busbar 122. For example, as shown in Figures 5 and 6, if the second busbar 121 is connected to the positive electrode terminal 20111 of the third battery cell 23, then the third busbar 122 is connected to the negative electrode terminal 20112 of the third battery cell 23; conversely, if the second busbar 121 is connected to the negative electrode terminal 20112 of the third battery cell 23, then the third busbar 122 is connected to the positive electrode terminal 20111 of the third battery cell 23, thereby realizing the series connection between the third battery cell 23 and other battery cells 20 through the second busbar 121 and the third busbar 122. For example, if the second busbar 121 is connected to the electrode terminals 2011 of the first battery cell 21 and the third battery cell 23 with opposite polarities, and the third busbar 122 is connected to the electrode terminals 2011 of the third battery cell 23 and the fourth battery cell 24 with opposite polarities, then a series connection can be achieved between the first battery cell 21, the third battery cell 23 and the fourth battery cell 24.

[0102] Conversely, the electrode terminal 2011 of the third battery cell 23 connected to the second busbar 121 can have the same polarity as the electrode terminal 2011 of the third battery cell 23 connected to the third busbar 122, or they can be the same electrode terminal 2011. For example, the second busbar 121 and the third busbar 122 can both be connected to the positive electrode terminal 20111 of the third battery cell 23, or both can be connected to the negative electrode terminal 20112 of the third battery cell 23, so as to realize the mixed connection between the third battery cell 23 and other battery cells 20. For example, if the second busbar 121 connects the electrode terminals 2011 of the first battery cell 21 and the third battery cell 23 with opposite polarities, and the third busbar 122 connects the electrode terminals 2011 of the third battery cell 23 and the fourth battery cell 24 with opposite polarities, then when the second busbar 121 and the third busbar 122 are connected to the electrode terminals 2011 of the third battery cell 23 with the same polarity, parallel connection between the first battery cell 21 and the fourth battery cell 24, as well as series connection between the two and the third battery cell 23, can be achieved.

[0103] By reasonably setting the connection methods between the current collectors included in the first current collector assembly 11 and the current collectors included in the second current collector assembly 12 and different battery cells 20, at least one of the series, parallel and mixed connection of battery cells 20 in the battery device 10 can be realized to suit different application scenarios.

[0104] It should be understood that the weight of the battery device 10 in this application embodiment can be set according to actual application. For example, the weight of the battery device 10 can range from [300kg, 2t]. The weight of the battery device 10 is usually greater than or equal to 300kg to increase the capacity of the battery device 10; conversely, the weight of the battery device 10 is usually less than or equal to 2t to facilitate transportation and control costs.

[0105] In some embodiments, the weight of the battery device 10 can be in the range of [300kg, 2t]; further, the weight of the battery device 10 can also be in the range of [500kg, 1.8t]. Increasing the weight of the battery device 10 can further increase its capacity; limiting the maximum weight of the battery device 10 can reduce transportation difficulty and reduce costs.

[0106] In some embodiments, the weight of the battery device 10 can be any of the following values, or between any two of the following values: 300kg, 400kg, 500kg, 600kg, 700kg, 800kg, 900kg, 1t, 1.1t, 1.2t, 1.3t, 1.4t, 1.5t, 1.6t, 1.7t, 1.8t, 1.9t, and 2t.

[0107] It should be understood that the size of the battery device 10 in this application embodiment can be set according to actual application. For example, along the second direction, the size L1 of each of the plurality of battery cell assemblies 200 can be set according to actual application.

[0108] In some embodiments, along the second direction, the value of the dimension L1 of each battery cell assembly 200 in the plurality of battery cell assemblies 200 ranges from [1000mm, 3000mm]. As shown in Figures 3 to 6, the second direction can be the length direction Y of the battery device 10. The dimension L1 of each battery cell assembly 200 is typically greater than or equal to 1000mm to increase the number of battery cells 20, thereby increasing the capacity of the battery device 10. Furthermore, with the increase in the dimension L1 of each battery cell assembly 200, the busbars in the first busbar assembly 11 and the busbars in the second busbar assembly 12 can effectively limit the misalignment and torsion between battery cells 20, showing significant advantages in mechanical conditions such as vibration, impact, and hoisting, and can improve the structural stability of the battery device 10. However, the dimension L1 of each battery cell assembly 200 is typically no more than 3000mm, which can limit the excessive force borne by each busbar in mechanical conditions such as vibration, impact, and hoisting, maintain the stability of the busbars, and also reduce the overall size of the battery device 10, facilitating transportation.

[0109] In some embodiments, along the second direction, the value of the dimension L1 of each battery cell assembly 200 can be in the range of [1000mm, 3000mm]; further, the value of the dimension L1 of each battery cell assembly 200 can also be in the range of [2000mm, 2500mm], so as to further increase the number of battery cells 20 and increase the number of battery devices 10. The busbars in the first busbar assembly 11 and the busbars in the second busbar assembly 12 can also effectively limit the misalignment and torsion between battery cells 20, so as to improve the structural stability of the battery device 10.

[0110] In some embodiments, along the second direction, the size L1 of each battery cell assembly 200 can be any of the following values, or between any two of the following values: 1000mm, 1100mm, 1200mm, 1300mm, 1400mm, 1500mm, 1600mm, 1700mm, 1800mm, 1900mm, 2000mm, 2100mm, 2200mm, 2300mm, 2400mm, 2500mm, 2600mm, 2700mm, 2800mm, 2900mm, and 3000mm.

[0111] In this embodiment of the application, along the first direction, the size L2 of all battery cell components 200 in the battery device can be set according to the actual application.

[0112] In some embodiments, along the first direction, the dimension L2 of all battery cell assemblies 200 within the battery device 10 ranges from [700mm, 2000mm]. As shown in Figures 3 to 6, the first direction can be the width direction X of the battery device 10, and the dimension L2 of all battery cell assemblies 200 within the battery device 10 is the total width of all battery cell assemblies 200. For example, if the battery device 10 includes four battery cell assemblies 200, then the total dimension of the four battery cell assemblies 200 along the first direction is L2. In the embodiments of this application, the dimension L2 of all battery cell assemblies 200 within the battery device 10 is typically greater than or equal to 700mm to increase the number of battery cells 20, thereby increasing the capacity of the battery device 10. Furthermore, by appropriately increasing the dimension L2 of all battery cell assemblies 200, the misalignment and torsion between battery cells 20 can be limited by the busbars in the first busbar assembly 11 and the busbars in the second busbar assembly 12, thereby improving the structural stability of the battery device 10 under mechanical conditions such as vibration, impact, and hoisting. However, the size L2 of all battery cell assembly 200 is usually no more than 2000 mm, in order to reduce the overall size of the battery device 10 and facilitate transportation.

[0113] In some embodiments, along the first direction, the value range of the size L2 of all battery cell assemblies 200 in the battery device 10 can be [700mm, 2000mm]; further, the value range of the size L2 of all battery cell assemblies 200 can also be [800mm, 1800mm], so as to further improve the capacity of the battery device 10. At the same time, the busbars in the first busbar assembly 11 and the busbars in the second busbar assembly 12 can effectively limit the misalignment and torsion between battery cells 20, so as to improve the structural stability of the battery device 10.

[0114] In some embodiments, along the first direction, the size L2 of all the battery cell assemblies 200 within the battery device 10 can be any of the following values, or between any two of the following values: 700mm, 800mm, 900mm, 1000mm, 1100mm, 1200mm, 1300mm, 1400mm, 1500mm, 1600mm, 1700mm, 1800mm, 1900mm, and 2000mm.

[0115] The structure of the busbar components in the first busbar component set 11 and the busbar components in the second busbar component set 12 of this application will be described below with reference to the accompanying drawings.

[0116] Figure 7 shows a schematic diagram of the structure of any one of the busbar components in the first busbar component set 11 of this application embodiment. For example, Figure 7 can be a first busbar component 111 used to connect the first battery cell 21 and the second battery cell 22. Figure 8 shows a top view of any one of the busbar components in the first busbar component set 11 of this application embodiment. For example, Figure 8 can be a top view of the busbar component shown in Figure 7.

[0117] In some embodiments, each busbar in the first busbar assembly 11 includes: a first connecting portion 1101 and a second connecting portion 1102, the first connecting portion 1101 and the second connecting portion 1102 being used to connect the electrode terminals 2011 of two adjacent battery cells 20 along a second direction; and a first raised portion 1103, the first raised portion 1103 being located between the first connecting portion 1101 and the second connecting portion 1102 along the second direction, the first raised portion 1103 being bent away from the first connecting portion 1101 and the second connecting portion 1102 in a direction away from the first connecting portion 1101 and the second connecting portion 1102. For example, as shown in Figures 7 and 8, taking the first busbar 111 as an example, the first busbar 111 is used to connect the electrode terminals 2011 of the first battery cell 21 and the electrode terminals 2011 of the second battery cell 22. The first busbar component 111 includes a first connecting part 1101 and a second connecting part 1102. The first connecting part 1101 can be used to connect the electrode terminal 2011 of the first battery cell 21, and the second connecting part 1102 is used to connect the electrode terminal 2011 of the second battery cell 22.

[0118] For example, the first connecting portion 1101 may include a first welding area 11012 for welding and fixing to the electrode terminal 2011 of the first battery cell 21. Further, the first connecting portion 1101 may also include a first positioning hole 11011 for positioning with the electrode terminal 2011 of the first battery cell 21 to facilitate welding. Similarly, the second connecting portion 1102 may include a second welding area 11022 for welding and fixing to the electrode terminal 2011 of the second battery cell 22. Further, the second connecting portion 1102 may also include a second positioning hole 11021 for positioning with the electrode terminal 2011 of the second battery cell 22 to facilitate welding.

[0119] As shown in Figures 7 and 8, the first busbar component 111 of this embodiment may further include a first raised portion 1103. Along the second direction, the first raised portion 1103 is located between the first connecting portion 1101 and the second connecting portion 1102. The first raised portion 1103 can be used to connect the first connecting portion 1101 and the second connecting portion 1102. The first raised portion 1103 bends away from the first connecting portion 1101 and the second connecting portion 1102. For example, if the first busbar component 111 is configured to face the first wall 201 of the first battery cell 21 and the second battery cell 22, then the first raised portion 1103 bulges and bends away from the first wall 201 of the first battery cell 21 and the second battery cell 22. The first raised portion 1103 can be used to absorb the deformation of the first busbar 111 caused by misalignment or torsion between the first battery cell 21 and the second battery cell 22. In particular, it can be used to absorb the tensile deformation of the first busbar 111 along the second direction, reduce the risk of breakage of the first busbar 111, and improve the stability of the first busbar 111.

[0120] In some embodiments, each busbar in the first busbar assembly 11 further includes a first opening 1104, which extends along a second direction and passes through a first raised portion 1103. Specifically, the first opening 1104 extends from the first connecting portion 1101, through the first raised portion 1103, to the second connecting portion 1102. The first opening 1104 can reduce stress concentration at the first raised portion 1103, thereby reducing localized damage to the first busbar 111 caused by stress concentration and improving the structural stability of the first busbar 111.

[0121] It should be understood that the shape of the first opening 1104 in this embodiment can be set according to actual application. For example, the first opening 1104 is symmetrically distributed with respect to the center line l1 perpendicular to the second direction of the first raised portion 1103, so as to balance the force on different areas of the first confluence component 111 and reduce stress concentration.

[0122] In some embodiments, the first opening 1104 includes a first main body region 11043, a first extension region 11041, and a second extension region 11042. The first main body region 11043 is located between the first extension region 11041 and the second extension region 11042. The first main body region 11043 extends along a second direction and passes through a first raised portion 1103. The first extension region 11041 is located at a first connecting portion 1101, and the extension direction of the first extension region 11041 is different from the second direction. The second extension region 11042 is located at a second connecting portion 1102, and the extension direction of the second extension region 11042 is different from the second direction. For example, taking the first busbar component 111 as an example, considering that the first battery cell 21 and the second battery cell 22 may be misaligned or twisted in different directions, the first main body area 11043, the first extension area 11041 and the second extension area 11042 can be set to effectively reduce stress concentration in different areas of the first busbar component 111, thereby reducing the risk of local damage or even breakage of the first busbar component 111 and improving the stability of the first busbar component 111.

[0123] It should be understood that the extension direction of the first extension region 11041 in this embodiment is different from the second direction. For example, the extension direction of the first extension region 11041 may be perpendicular to or inclined to the second direction. Similarly, the extension direction of the second extension region 11042 is different from the second direction. For example, the extension direction of the second extension region 11042 may be perpendicular to or inclined to the second direction. This embodiment is not limited to this. In some embodiments, the extension directions of the first extension region 11041 and the second extension region 11042 can be reasonably set according to the setting position of the first busbar 111 and the position of the battery cell 20 connected to the first busbar 111.

[0124] In some embodiments, the first opening 1104 may also have other shapes. For example, the first opening 1104 may only include the first body region 11043, or the first opening 1104 may be elongated to facilitate processing.

[0125] In some embodiments, each busbar in the first busbar assembly 11 further includes a third opening 1105, which is located at one end of the first raised portion 1103 perpendicular to the second direction. This is so that, perpendicular to the second direction, the size of the connection between the first connecting portion 1101 and the first raised portion 1103 is smaller than the size of other areas of the first connecting portion 1101, and the size of the connection between the second connecting portion 1102 and the first raised portion 1103 is smaller than the size of other areas of the second connecting portion 1102. Specifically, as shown in Figures 7 and 8, taking the second direction as the length direction Y of the battery device 10 as an example, the third opening 1105 is located at one end of the first raised portion 1103 along the width direction X of the battery device 10.

[0126] Because of the third opening 1105, the size of the connection between the first connecting portion 1101 and the first raised portion 1103 is smaller than the size of other areas of the first connecting portion 1101, and the size of the connection between the second connecting portion 1102 and the first raised portion 1103 is smaller than the size of other areas of the second connecting portion 1102. For example, as shown in Figures 7 and 8, taking the symmetrical distribution of the third opening 1105 with respect to the center line l1 perpendicular to the second direction of the first raised portion 1103 as an example, the size of the connection between the first connecting portion 1101 and the first raised portion 1103 can be equal to the size of the connection between the second connecting portion 1102 and the first raised portion 1103, for example, both being L3. Therefore, the dimension L3 at the connection between the first connecting portion 1101 and the first raised portion 1103 is smaller than the dimension L4 of other areas of the first connecting portion 1101, and the dimension L3 at the connection between the second connecting portion 1102 and the first raised portion 1103 is smaller than the dimension L4 of other areas of the second connecting portion 1102, so as to reduce stress concentration at the connection between the first connecting portion 1101 and the first raised portion 1103, and stress concentration at the connection between the second connecting portion 1102 and the first raised portion 1103.

[0127] It should be understood that the structure of the busbar in the second busbar assembly 12 of this application embodiment may be the same as or different from the structure of the busbar in the first busbar assembly 11, and this application embodiment is not limited thereto.

[0128] Figure 9 shows a schematic diagram of the structure of any one of the busbar components in the second busbar component set 12 of this application embodiment. For example, Figure 9 can be a second busbar component 121 used to connect the first battery cell 21 and the third battery cell 23. Figure 10 shows a top view of any one of the busbar components in the second busbar component set 12 of this application embodiment. For example, Figure 10 can be a top view of the busbar component shown in Figure 9.

[0129] In some embodiments, each busbar in the second busbar assembly 12 includes: a third connecting portion 1201 and a fourth connecting portion 1202, which are respectively used to connect the electrode terminals 2011 of two adjacent battery cells 20 along a first direction; and a second raised portion 1203, which is located between the third connecting portion 1201 and the fourth connecting portion 1202 along the first direction, and is bent away from the third connecting portion 1201 and the fourth connecting portion 1202. For example, as shown in Figures 9 and 10, taking the second busbar 121 as an example, the second busbar 121 can be used to connect the electrode terminals 2011 of the first battery cell 21 and the electrode terminals 2011 of the third battery cell 23. The second busbar component 121 includes a third connection portion 1201 and a fourth connection portion 1202. The third connection portion 1201 can be used to connect the electrode terminal 2011 of the first battery cell 21, and the fourth connection portion 1202 is used to connect the electrode terminal 2011 of the third battery cell 23.

[0130] For example, the third connecting portion 1201 may include a third welding area 12012 for welding and fixing to the electrode terminal 2011 of the first battery cell 21. Further, the third connecting portion 1201 may also include a third positioning hole 12011 for positioning with the electrode terminal 2011 of the first battery cell 21, facilitating welding. Similarly, the fourth connecting portion 1202 may include a fourth welding area 12022 for welding and fixing to the electrode terminal 2011 of the third battery cell 23. Further, the fourth connecting portion 1202 may also include a fourth positioning hole 12021 for positioning with the electrode terminal 2011 of the third battery cell 23, facilitating welding.

[0131] As shown in Figures 9 and 10, the second busbar component 121 of this embodiment may further include a second raised portion 1203. Along the first direction, the second raised portion 1203 is located between the third connecting portion 1201 and the fourth connecting portion 1202. The second raised portion 1203 can be used to connect the third connecting portion 1201 and the fourth connecting portion 1202. The second raised portion 1203 bends away from the third connecting portion 1201 and the fourth connecting portion 1202. For example, if the second busbar component 121 is configured to face the first wall 201 of the first battery cell 21 and the third battery cell 23, then the second raised portion 1203 bulges and bends away from the first wall 201 of the first battery cell 21 and the third battery cell 23. The second raised portion 1203 can be used to absorb the deformation of the second busbar 121 caused by misalignment or torsion between the first battery cell 21 and the third battery cell 23. In particular, it can be used to absorb the tensile deformation of the second busbar 121 along the first direction, reduce the risk of the second busbar 121 breaking, and improve the stability of the second busbar 121.

[0132] In some embodiments, each busbar in the second busbar assembly 12 further includes a second opening 1204, which extends along a first direction and passes through a second raised portion 1203. Specifically, the second opening 1204 extends from the third connecting portion 1201, through the second raised portion 1203, to the fourth connecting portion 1202. The second opening 1204 can reduce stress concentration in the second raised portion 1203, thereby reducing localized damage to the second busbar 121 caused by stress concentration and improving the structural stability of the second busbar 121.

[0133] It should be understood that the shape of the second opening 1204 in this embodiment can be configured according to actual application. For example, the second opening 1204 is symmetrically distributed with respect to the center line l2 of the second raised portion 1203 perpendicular to the first direction, so as to balance the force on different areas of the second confluence member 121 and reduce stress concentration.

[0134] In some embodiments, the second opening 1204 includes a second main body region 12043, a third extension region 12041, and a fourth extension region 12042. The second main body region 12043 is located between the third extension region 12041 and the fourth extension region 12042. The second main body region 12043 extends along a first direction and passes through the second protrusion 1203. The third extension region 12041 is located at the third connecting portion 1201, and the extension direction of the third extension region 12041 is different from the first direction. The fourth extension region 12042 is located at the fourth connecting portion 1202, and the extension direction of the fourth extension region 12042 is different from the first direction. For example, taking the second busbar component 121 as an example, considering that the first battery cell 21 and the third battery cell 23 may be misaligned or twisted in different directions, the second main body area 12043, the third extension area 12041 and the fourth extension area 12042 can be set to effectively reduce stress concentration in different areas of the second busbar component 121, thereby reducing the risk of local damage or even breakage of the second busbar component 121 and improving the stability of the second busbar component 121.

[0135] It should be understood that the extension direction of the third extension region 12041 in this embodiment is different from the first direction. For example, the extension direction of the third extension region 12041 may be perpendicular to or inclined to the first direction. Similarly, the extension direction of the fourth extension region 12042 is different from the first direction. For example, the extension direction of the fourth extension region 12042 may be perpendicular to or inclined to the first direction. This embodiment is not limited to this. In some embodiments, the extension directions of the third extension region 12041 and the fourth extension region 12042 can be reasonably set according to the setting position of the second busbar 121 and the position of the battery cell 20 connected to the second busbar 121.

[0136] In some embodiments, the second opening 1204 may also have other shapes. For example, the second opening 1204 may only include the second body region 12043, or the second opening 1204 may be elongated to facilitate processing.

[0137] In some embodiments, the second busbar component 121 of this application may also be provided with other openings to reduce stress concentration, but this application is not limited thereto.

[0138] According to some embodiments of this application, this application also provides an electrical device including the battery device 10 described in any of the above embodiments, and the battery device 10 is used to provide electrical energy to the electrical device.

[0139] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0140] This application provides an energy storage device including one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0141] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical devices during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0142] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0143] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0144] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0145] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device via piping to regulate the temperature of the individual battery cells.

[0146] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0147] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as the Insulation Monitoring Module (IMM), the Master Battery Management Unit (MBMU), the Ethernet (ETH) module, and the fiber optic conversion module.

[0148] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0149] As an example, the power distribution unit can be used to distribute power to the power modules of the energy storage device.

[0150] According to some embodiments of this application, this application also provides an energy storage system, including the energy storage device 1 described in any of the above schemes. Figure 11 shows a structural block diagram of the energy storage system according to an embodiment of this application. In some embodiments, as shown in Figure 11, the energy storage system may include one or more energy storage devices 1 and a power converter system (PCS) 2, wherein the power converter 2 is used to connect between a power generation device 3 and the energy storage device 1. The power generation device 3 is used to generate electrical energy, and the electrical energy generated by the power generation device 3 can be stored in the energy storage device 1 through the power converter 2. As an example, the power generation device 3 may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of the power generation device 3 is not limited in this application.

[0151] According to some embodiments of this application, a charging network is provided. Figure 12 shows a structural block diagram of the charging network according to an embodiment of this application. As shown in Figure 12, the charging network includes a charging pile 4 and an energy storage device 1. The charging pile 4 is electrically connected to the energy storage device 1, and the energy storage device 1 provides electrical energy to the charging pile 4. The charging pile 4 is electrically connected to a battery device in the energy storage device 1 via a cable, and the battery device can provide its stored electrical energy to the charging pile 4. The charging pile 4 has one or more connectors 5, which are used to connect to an electrical device (such as a vehicle) to replenish energy to the electrical device.

[0152] The energy storage device 1 can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0153] According to some embodiments of this application, referring to Figures 3 to 10, this application provides a battery device 10, including: a plurality of battery cell assemblies 200 arranged along a first direction, each of the plurality of battery cell assemblies 200 including a plurality of battery cells 20 arranged along a second direction, the first direction being perpendicular to the second direction; a first busbar assembly 11, the first busbar assembly 11 including a plurality of busbars, each busbar in the first busbar assembly 11 being used to connect the electrode terminals 2011 of two adjacent battery cells 20 along the second direction; and a second busbar assembly 12, the second busbar assembly 12 including a plurality of busbars, each busbar in the second busbar assembly 12 being used to connect the electrode terminals 2011 of two adjacent battery cells 20 along the first direction.

[0154] The plurality of battery cell assemblies 200 includes a first battery cell assembly 210, which includes adjacent first battery cells 21 and second battery cells 22. A first busbar assembly 11 includes a first busbar 111, which is used to connect the electrode terminals 2011 of the first battery cells 21 and the second battery cells 22, which are of opposite polarity. The plurality of battery cell assemblies 200 also includes a second battery cell assembly 220 adjacent to the first battery cell assembly 210, which includes a third battery cell 23 adjacent to the first battery cells 21. A second busbar assembly 12 includes a second busbar 121, which is used to connect the electrode terminals 2011 of the first battery cells 21 and the third battery cells 23, which are of opposite polarity. The electrode terminals 2011 of the first battery cells 21 connected to the first busbar 111 have opposite polarity to the electrode terminals 2011 of the first battery cells 21 connected to the second busbar 121. The multiple battery cell assembly 200 also includes a third battery cell assembly 230 adjacent to the second battery cell assembly 220. The second battery cell assembly 220 is located between the first battery cell assembly 210 and the third battery cell assembly 230. The third battery cell assembly 230 includes a fourth battery cell 24 adjacent to the third battery cell 23. The second busbar assembly 12 also includes a third busbar assembly 122 for connecting the electrode terminals 2011 of the third battery cell 23 and the electrode terminals 2011 of the fourth battery cell 24, which have opposite polarities. The electrode terminals 2011 of the third battery cell 23 connected to the second busbar assembly 121 have opposite polarities to the electrode terminals 2011 of the third battery cell 23 connected to the third busbar assembly 122. Each of the multiple battery cells 20 has a first wall 201 including two electrode terminals 2011 with opposite polarities arranged along a first direction. The first wall 201 is perpendicular to a third direction, which is perpendicular to both the first and second directions. A first busbar assembly 11 and a second busbar assembly 12 are disposed toward the first wall 201 of the multiple battery cells 20.

[0155] Each busbar in the first busbar assembly 11 includes: a first connecting portion 1101 and a second connecting portion 1102, which are respectively used to connect the electrode terminals 2011 of two adjacent battery cells 20 along a second direction; and a first raised portion 1103, which is located between the first connecting portion 1101 and the second connecting portion 1102 along the second direction and bends away from the first connecting portion 1101 and the second connecting portion 1102. Each busbar in the first busbar assembly 11 also includes: a first opening 1104, which extends along the second direction and passes through the first raised portion 1103. The first opening 1104 is symmetrically distributed with respect to the centerline of the first raised portion 1103 perpendicular to the second direction. The first opening 1104 includes a first main body area 11043, a first extension area 11041, and a second extension area 11042. The first main body area 11043 is located between the first extension area 11041 and the second extension area 11042. The first main body area 11043 extends along a second direction and passes through a first raised portion 1103. The first extension area 11041 is located at a first connecting portion 1101. The extension direction of the first extension area 11041 is different from the second direction. The second extension area 11042 is located at a second connecting portion 1102. The extension direction of the second extension area 11042 is different from the second direction.

[0156] Each busbar in the second busbar assembly 12 includes: a third connecting portion 1201 and a fourth connecting portion 1202, which are respectively used to connect the electrode terminals 2011 of two adjacent battery cells 20 along a first direction; and a second raised portion 1203, which is located between the third connecting portion 1201 and the fourth connecting portion 1202 along the first direction and bends away from the third connecting portion 1201 and the fourth connecting portion 1202. Each busbar in the second busbar assembly 12 also includes: a second opening 1204, which extends along the first direction and passes through the second raised portion 1203.

[0157] The weight of the battery device 10 ranges from [300kg, 2t]. Along the second direction, the dimensions of each of the multiple battery cell assemblies 200 range from [1000mm, 3000mm]. Along the first direction, the dimensions of all battery cell assemblies 200 within the battery device 10 range from [700mm, 2000mm].

[0158] 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: A plurality of battery cell assemblies (200) arranged along a first direction, each of the plurality of battery cell assemblies (200) including a plurality of battery cells (20) arranged along a second direction, the first direction being perpendicular to the second direction; A first busbar assembly (11) comprising a plurality of busbars, each of the first busbars assembly (11) being used to connect the electrode terminals (2011) of two adjacent battery cells (20) along the second direction; The second busbar assembly (12) includes a plurality of busbars, each of which is used to connect the electrode terminals (2011) of two adjacent battery cells (20) along the first direction.

2. The battery device according to claim 1, characterized in that, The plurality of battery cell assemblies (200) includes a first battery cell assembly (210), which includes adjacent first battery cells (21) and second battery cells (22). The first busbar assembly (11) includes a first busbar (111) for connecting the electrode terminals (2011) of the first battery cell (21) and the electrode terminals (2011) of the second battery cell (22) with opposite polarities.

3. The battery device according to claim 2, characterized in that, The plurality of battery cell assemblies (200) further includes a second battery cell assembly (220) adjacent to the first battery cell assembly (210), and the second battery cell assembly (220) includes a third battery cell (23) adjacent to the first battery cell (21). The second busbar assembly (12) includes a second busbar (121) for connecting the electrode terminals (2011) of the first battery cell (21) with opposite polarities to the electrode terminals (2011) of the third battery cell (23).

4. The battery device according to claim 3, characterized in that, The first battery cell (21) is connected to the electrode terminal (2011) of the first busbar (111) with opposite polarity to the electrode terminal (2011) of the first battery cell (21) connected to the second busbar (121).

5. The battery device according to claim 3 or 4, characterized in that, The plurality of battery cell assemblies (200) further includes a third battery cell assembly (230) adjacent to the second battery cell assembly (220), the second battery cell assembly (220) being located between the first battery cell assembly (210) and the third battery cell assembly (230), and the third battery cell assembly (230) including a fourth battery cell (24) adjacent to the third battery cell (23). The second busbar assembly (12) further includes a third busbar (122) for connecting the electrode terminals (2011) of the third battery cell (23) and the electrode terminals (2011) of the fourth battery cell (24) with opposite polarities.

6. The battery device according to claim 5, characterized in that, The third battery cell (23) is connected to the electrode terminal (2011) of the second busbar (121) with opposite polarity to the electrode terminal (2011) of the third battery cell (23) connected to the third busbar (122).

7. The battery device according to any one of claims 1 to 6, characterized in that, The first wall (201) of each of the plurality of battery cells (20) includes two electrode terminals (2011) of opposite polarity arranged along the first direction, the first wall (201) being perpendicular to a third direction, the third direction being perpendicular to the first direction and the second direction; The first busbar assembly (11) and the second busbar assembly (12) are disposed toward the first wall (201) of the plurality of battery cells (20).

8. The battery device according to any one of claims 1 to 7, characterized in that, Each bus component in the first bus component set (11) includes: The first connecting part (1101) and the second connecting part (1102) are respectively used to connect the electrode terminals (2011) of two adjacent battery cells (20) along the second direction; The first raised portion (1103) is located between the first connecting portion (1101) and the second connecting portion (1102) along the second direction. The first raised portion (1103) bends away from the first connecting portion (1101) and the second connecting portion (1102) in a direction away from the first connecting portion (1101) and the second connecting portion (1102).

9. The battery device according to claim 8, characterized in that, Each bus component in the first bus component set (11) further includes: The first opening (1104) extends along the second direction and passes through the first raised portion (1103).

10. The battery device according to claim 9, characterized in that, The first opening (1104) is symmetrically distributed relative to the center line of the first raised portion (1103) perpendicular to the second direction.

11. The battery device according to claim 9 or 10, characterized in that, The first opening (1104) includes a first main body area (11043), a first extension area (11041), and a second extension area (11042). The first main body area (11043) is located between the first extension area (11041) and the second extension area (11042). The first main body area (11043) extends along the second direction and passes through the first raised portion (1103). The first extension region (11041) is located at the first connecting portion (1101), and the extension direction of the first extension region (11041) is different from the second direction. The second extension area (11042) is located in the second connecting part (1102), and the extension direction of the second extension area (11042) is different from the second direction.

12. The battery device according to any one of claims 8 to 11, characterized in that, Each bus component in the first bus component set (11) further includes: A third opening (1105) is located at one end of the first raised portion (1103) perpendicular to the second direction, such that, in the perpendicular direction, the size of the connection between the first connecting portion (1101) and the first raised portion (1103) is smaller than the size of other areas of the first connecting portion (1101), and the size of the connection between the second connecting portion (1102) and the first raised portion (1103) is smaller than the size of other areas of the second connecting portion (1102).

13. The battery device according to any one of claims 1 to 12, characterized in that, Each bus component in the second bus component set (12) includes: The third connecting part (1201) and the fourth connecting part (1202) are respectively used to connect the electrode terminals (2011) of two adjacent battery cells (20) along the first direction; The second raised portion (1203) is located between the third connecting portion (1201) and the fourth connecting portion (1202) along the first direction. The second raised portion (1203) bends away from the third connecting portion (1201) and the fourth connecting portion (1202) in a direction away from the third connecting portion (1201) and the fourth connecting portion (1202).

14. The battery device according to claim 13, characterized in that, Each bus component in the second bus component set (12) further includes: The second opening (1204) extends along the first direction and passes through the second raised portion (1203).

15. The battery device according to claim 14, characterized in that, The second opening (1204) is symmetrically distributed relative to the center line of the second raised portion (1203) perpendicular to the first direction.

16. The battery device according to claim 14 or 15, characterized in that, The second opening (1204) includes a second main body area (12043), a third extension area (12041), and a fourth extension area (12042). The second main body area (12043) is located between the third extension area (12041) and the fourth extension area (12042). The second main body area (12043) extends along the first direction and passes through the second raised portion (1203). The third extension region (12041) is located in the third connecting portion (1201), and the extension direction of the third extension region (12041) is different from the first direction. The fourth extension region (12042) is located in the fourth connecting portion (1202), and the extension direction of the fourth extension region (12042) is different from the first direction.

17. The battery device according to any one of claims 1 to 16, characterized in that, The weight of the battery device ranges from [300kg, 2t].

18. The battery device according to any one of claims 1 to 17, characterized in that, Along the second direction, the size of each of the plurality of battery cell assemblies (200) ranges from [1000mm, 3000mm].

19. The battery device according to any one of claims 1 to 18, characterized in that, Along the first direction, the dimensions of all battery cell assemblies (200) in the battery device range from [700mm, 2000mm].

20. An energy storage device, characterized in that, include: The battery devices as described in any one of claims 1 to 19, wherein the battery devices are used to store or provide electrical energy.

21. An energy storage system, characterized in that, include: The power conversion device and the energy storage device as described in claim 20, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

22. A charging network, characterized in that, include: The charging pile and the energy storage device as described in claim 20 or the energy storage system as described in claim 21, wherein the energy storage device is used to provide electrical energy to the charging pile.

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