Battery monomer, battery device, power utilization device and energy storage device

Abstract

The utility model discloses a battery monomer, a battery device, a power utilization device and an energy storage device. Wherein the battery monomer comprises a shell, at least one side of the shell along a first direction is provided with an opening, the shell is also provided with an accommodating space, an electrode assembly is accommodated in the accommodating space, the opening is sealed by the end cover, the frame body comprises a side plate extending along the first direction, and the frame body is accommodated in the accommodating space; the side plate is arranged between the electrode assembly and the side wall of the shell along the thickness direction of the side plate; in the first direction, the size of one end of the side plate in the thickness direction of the side plate is smaller than that of the other end of the side plate in the thickness direction of the side plate. According to the invention, the gap between the electrode assembly and the shell can be filled, the external impact on the electrode assembly is relieved to a certain extent, and the working reliability of the electrode assembly is improved; meanwhile, the electrode assembly can be conveniently assembled into the shell, and the assembling efficiency of the single battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to battery cells, battery devices, power-consuming devices, and energy storage devices. Background Art

[0002] New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in energy storage fields.

[0003] In new energy vehicles equipped with batteries, these batteries can be used to provide all or part of the power. In the energy storage sector, batteries can be installed in the energy storage box or directly at the user's side. The battery cells within the battery provide electrical energy. After being assembled into the housing, the electrode assemblies within the battery cells are susceptible to vibration and impact, which can damage the electrode assemblies. Therefore, reducing the vibration and impact to the electrode assemblies is a research topic in the industry. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a battery cell, a battery device, an electrical device and an energy storage device.

[0005] This application is implemented through the following technical solutions.

[0006] A first aspect of an embodiment of the present application provides a battery cell, which includes a shell, the shell having an opening on at least one side along a first direction, the shell also having a accommodating space, the accommodating space accommodating an electrode assembly, an end cover, the end cover closing the opening, and a frame, the frame including a side plate extending along the first direction, the frame being accommodated in the accommodating space; along the thickness direction of the side plate, the side plate is arranged between the electrode assembly and the side wall of the shell; along the first direction, the dimension of one end of the side plate along the thickness direction of the side plate is smaller than the dimension of the other end of the side plate along the thickness direction of the side plate.

[0007] Because the side panels are positioned between the electrode assembly and the housing, they fill the gap between them, alleviating external impacts on the electrode assembly to a certain extent and improving its operational reliability. Furthermore, to facilitate the insertion of the electrode assembly and the housing, the side panels are designed with a thinner end. This thinner end reduces the size of the housing, making it easier for the housing to fit.

[0008] In some embodiments, along the first direction, the side panel includes a first section and a second section, the first section includes the one end, and the second section includes the other end; along the first direction, the length of the first section does not exceed half the length of the side panel.

[0009] Since the length of the first section does not exceed half the length of the side plate, both the assembly efficiency of the frame and the space utilization of the shell can be taken into account, so that the electrode assembly can be more effectively supported.

[0010] In some embodiments, along the first direction, the thickness of the side plate gradually decreases as it moves away from the second section.

[0011] Since the thickness of the side panel gradually decreases, the thickness of the side panel can be gradually changed to adapt to the thickness difference between the first section and the second section, avoiding the adverse situation of stress concentration caused by sudden change in the thickness of the side panel, and playing a role in alleviating stress concentration. At the same time, it is more conducive to the frame being assembled into the shell along the first direction, reducing costs while improving assembly efficiency.

[0012] In some embodiments, a transition section is provided between the first section and the second section along the first direction, and a thickness of the transition section gradually decreases as the distance from the second section increases.

[0013] Because the thickness of the transition section gradually decreases, it smoothly connects the first and second sections, reducing the risk of a step between the two sections due to the thickness difference, thereby alleviating stress concentration. This also facilitates the assembly of the frame into the housing along the first direction, reducing costs while improving assembly efficiency.

[0014] In some embodiments, the thickness of the first section is between 0.2 mm and 1 mm, and / or the distance between the first section and the adjacent side wall is between 0.2 mm and 0.6 mm.

[0015] This helps to properly control the distance between the side panels and the housing while assembling the frame into the housing, effectively reducing interference between the side panels and the housing.

[0016] In some embodiments, the thickness of the second section is between 0.3 mm and 1.5 mm, and / or the distance between the second section and the adjacent side wall is between 0.1 mm and 0.5 mm.

[0017] This helps to properly control the distance between the side panels and the shell while assembling the frame into the shell, thereby improving the space utilization inside the shell and further alleviating the external impact on the electrode assembly.

[0018] In some embodiments, along the first direction, the second section has a straight section, and the length of the straight section is not less than half the length of the side panel.

[0019] As a result, the side panels can provide stable support in the thickness direction, limit the deformation of the electrode assembly, alleviate external impact on the electrode assembly, and further improve the stability of the frame.

[0020] In some embodiments, the side plate includes a first side plate and a second side plate arranged opposite to each other along the thickness direction of the side plate, the electrode assembly is located between the first side plate and the second side plate, and the thickness direction of the side plate is parallel to the large surface of the battery cell.

[0021] Thus, the side plate can improve the stability of the electrode assembly in the side wall direction of the battery cell, while also reducing the occupancy rate of the internal space of the shell and improving the space utilization rate of the battery cell.

[0022] In some embodiments, the battery cell is provided with a first end cover, and the first end cover is fixed to the other end of the side plate.

[0023] Thus, the first end cover is fixed to the frame, which facilitates the installation of the frame into the shell from the opening along the first direction, and further improves the stability of the frame and the electrode assembly inside the shell.

[0024] In some embodiments, along the first direction, the battery cell is provided with a first end cover and a second end cover, and the first end cover is fixed to the other end of the side plate; the thickness of the first side plate at one end away from the first end cover is less than the thickness of the other end, and the thickness of the second side plate at one end away from the first end cover is less than the thickness of the other end.

[0025] Thus, the first end cover is fixed to the frame, which facilitates the installation of the frame into the shell from the opening close to the first end cover along the first direction, and further improves the stability of the frame and the electrode assembly inside the shell.

[0026] In some embodiments, the frame further includes two supporting plates, and the supporting plates, the first side plates, and the second side plates enclose and accommodate the electrode assembly.

[0027] Since the frame also includes two supporting plates, the frame can better accommodate and support the electrode assembly, further improving the working reliability of the electrode assembly.

[0028] In some embodiments, along the first direction, the length of the battery cell is 250 to 400 mm or 600 to 1500 mm.

[0029] Since the battery cell has a certain length, there is a large gap between the electrode assembly and the shell for easy insertion. Therefore, the side plate can fill the gap between the electrode assembly and the shell to a certain extent, reduce the shaking amplitude of the electrode assembly, alleviate the external impact on the electrode assembly, and improve the working reliability of the electrode assembly.

[0030] The side panels fit the electrode assembly, making it easier for the frame to be assembled into the shell, while also improving the stability of the electrode assembly.

[0031] A second aspect of the embodiments of the present application provides a battery device, comprising a box and a plurality of battery cells according to the first aspect of the embodiments of the present application accommodated in the box.

[0032] Since the battery device includes the battery cell disclosed in the first aspect of the embodiment of the present application, it can alleviate the impact vibration of the electrode assembly inside the battery cell to a certain extent, and at the same time facilitate the assembly of the electrode assembly and the frame into the shell, reducing the risk of accidental damage during assembly, and is beneficial to the working stability of the battery device.

[0033] In some embodiments, the side panels are parallel to the bottom surface of the box.

[0034] This improves the flexibility of battery cell arrangement and effectively utilizes the space within the casing.

[0035] A third aspect of the embodiments of the present application provides an electrical device, which includes the battery device described in the second aspect of the embodiments of the present application for providing electrical energy.

[0036] Since the electrical device includes the battery device disclosed in the second aspect of the embodiment of the present application, it can alleviate the impact and vibration of the electrode assembly inside the battery cell to a certain extent, and at the same time facilitate the assembly of the electrode assembly and the frame into the shell, reducing the risk of accidental damage during assembly, and is beneficial to the working stability of the electrical device.

[0037] The fourth aspect of the embodiments of the present application provides an energy storage device, which includes multiple battery cells described in the first aspect of the embodiments of the present application or multiple battery devices described in the second aspect of the embodiments of the present application, and the battery cells or the battery devices are used to store or provide electrical energy.

[0038] Since the energy storage device includes the battery cell disclosed in the first aspect of the embodiment of the present application or the battery device disclosed in the second aspect of the embodiment of the present application, it can alleviate the impact vibration of the electrode assembly inside the battery cell to a certain extent, and at the same time facilitate the assembly of the electrode assembly and the frame into the shell, reducing the risk of accidental damage during assembly, and is beneficial to the working stability of the energy storage device.

[0039] The beneficial effects of the embodiments of the present application include: through this application, the gap between the electrode assembly and the shell can be filled, which can alleviate the external impact on the electrode assembly to a certain extent and improve the working reliability of the electrode assembly; at the same time, it is conducive to the assembly of the electrode assembly into the shell, thereby improving the assembly efficiency of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to denote the same components. In the drawings:

[0041] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0042] Figure 2 A schematic exploded perspective view of a battery device provided in some embodiments of the present application;

[0043] Figure 3 A schematic exploded perspective view of a battery cell provided in some embodiments of the present application;

[0044] Figure 4 A schematic structural diagram of a first end cover of a battery cell provided in some other embodiments of the present application;

[0045] Figure 5 for Figure 4 Middle AA section view;

[0046] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0047] Figure 7 for Figure 5 A partial enlarged view of point C in the middle;

[0048] Figure 8 for Figure 5 A partial enlarged view of point D in the middle;

[0049] Figure 9 A schematic structural diagram of a side panel provided in some embodiments of the present application;

[0050] Figure 10 A schematic structural diagram of a side panel provided in some other embodiments of the present application;

[0051] Figure 11 A schematic structural diagram of an energy storage device provided in some embodiments of the present application.

[0052] Description of Reference Numerals

[0053] 1000-vehicle, 2000-energy storage device, 100-battery device, 101-bottom plate, 102-cover plate, 103-casing, 200-controller, 300-motor, 1-battery cell, 2-shell, 2A-opening, 2B-side wall, 3-end cover, 3A-electrode terminal, 31-first end cover, 32-second end cover, 4-frame, 5-side plate, 5A-first end, 5B-second end, 51-first side plate, 52-second side plate, 6-first section, 7-second section, 7A-straight section, 8-transition section, 9-support plate, 91-first support plate, 92-second support plate, 10-electrode assembly, S-accommodation space. DETAILED DESCRIPTION

[0054] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0056] In the description of the embodiments of this application, the technical terms "first," "second," "third," etc. are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0057] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0058] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0059] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0060] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0061] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and can be direct contact, contact through an intermediate medium layer, contact with essentially no interaction force between the two contacting parties, or contact with interaction force between the two contacting parties.

[0062] Below, this application is described in detail.

[0063] Currently, new energy batteries are increasingly being used in everyday life and industry. They are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in a variety of fields such as aerospace. As the application of power batteries continues to expand, market demand is also growing.

[0064] In many scenarios, the electrode assembly of a battery cell, after being assembled into the casing, can be damaged by vibration and impact, which can negatively impact the battery's operating stability. Therefore, reducing vibration and impact to the electrode assembly is a research and development topic in the industry.

[0065] After research and design, setting a frame inside the shell to protect the electrode assembly can reduce the gap inside the shell. The frame is set between the electrode assembly and the shell, and the frame can reduce the adverse effects of external impact vibration on the electrode assembly inside the shell.

[0066] Based on such a design concept, the present application designs a battery cell, which includes a shell having an opening on at least one side along a first direction, and the shell also having a accommodating space, which accommodates an electrode assembly, an end cover, which closes the opening, and a frame, which includes a side plate extending along the first direction, and the frame is accommodated in the accommodating space; along the thickness direction of the side plate, the side plate is arranged between the electrode assembly and the side wall of the shell; along the first direction, the dimension of one end of the side plate along the thickness direction of the side plate is smaller than the dimension of the other end of the side plate along the thickness direction of the side plate.

[0067] Because the side panels are positioned between the electrode assembly and the housing, they fill the gap between them, alleviating external impacts on the electrode assembly to a certain extent and improving its operational reliability. Furthermore, to facilitate the insertion of the electrode assembly and the housing, the side panels are designed with a thinner end. This thinner end reduces the size of the housing, making it easier for the housing to fit.

[0068] In the following embodiments, for the convenience of description, the electric device of one embodiment of the present application is taken as an example of a vehicle 1000. The following description is made with reference to the accompanying drawings.

[0069] Figure 1 The schematic diagram of the structure of the vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. Figure 1 As shown, a battery device 100 is installed inside vehicle 1000. Battery device 100 can be installed at the bottom, front, or rear of vehicle 1000. Battery device 100 can be used to power vehicle 1000. For example, battery device 100 can serve as an operating power source for vehicle 1000. Vehicle 1000 can also include a controller 200 and a motor 300. Controller 200 is used to control battery device 100 to power motor 300, for example, to meet the power requirements of vehicle 1000 during startup, navigation, and driving.

[0070] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0071] Figure 2 This is a schematic diagram of a three-dimensional exploded view of the battery device 100 provided in an embodiment of the present application. Figure 2 As shown, the battery device 100 includes a base plate 101 , a cover 102 and at least one battery cell 1 . The cover 102 covers the base plate 101 , thereby forming a storage space for the battery cell 1 between the base plate 101 and the cover 102 .

[0072] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0073] The battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present application.

[0074] Although not shown, a battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator is placed between the positive and negative electrodes to prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0075] In some embodiments, the electrode assembly is provided with tabs (not shown) that can conduct current from the electrode assembly. The tabs include a positive tab and a negative tab.

[0076] In some embodiments, a battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0077] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, and a polygonal battery. The polygonal battery is, for example, a hexagonal battery, etc. There is no special limitation in this application.

[0078] In some embodiments, as Figure 3 、 Figure 4 As shown, the housing includes a shell 2 and an end cap 3. The shell 2 has an opening 2A, and the end cap 3 closes the opening 2A to form a sealed space for accommodating the electrode assembly, electrolyte, and other substances. The shell 2 may have one or more openings 2A. One or more end caps 3 may also be provided.

[0079] In some embodiments, the housing can be a sealed structure or a non-sealed structure. For example, in a non-sealed structure, the housing protects the electrode assembly and includes a sealing bag between the housing and the electrode assembly, which encapsulates the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film.

[0080] In some embodiments, as Figure 3 、 Figure 4As shown, the housing is provided with at least one electrode terminal 3A, which is electrically connected to the tab (not shown). The electrode terminal 3A can be connected directly to the tab or indirectly to the tab via an adapter component. The electrode terminal 3A can be provided on the end cap 3 or on the housing 2.

[0081] The emissions from battery cells mentioned in this application include but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0082] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, parallel, or hybrid via a busbar.

[0083] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. For example, the battery cell assembly may be a battery module, which is a battery module formed by arranging and securing multiple battery cells to form a single module. For example, a battery module may be formed by bundling multiple battery cells using cable ties.

[0084] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case.

[0085] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0086] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0087] As an example, the housing may include a first housing and a second housing. The first housing and the second housing engage to form an enclosed space within the housing to house the battery cell assembly. Enclosed here means covered or closed, and can be either sealed or unsealed. The first housing may be a top cover or a bottom plate.

[0088] As an example, the box may include a top cover, a frame, and a bottom plate, wherein the top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box to accommodate the battery cell assembly.

[0089] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0090] In some embodiments, the battery device refers to an energy storage device, which includes a box with a door on at least one side. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0091] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells and battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0092] Below, refer to Figures 3 to 11 Some embodiments of the present application are described in detail.

[0093] Figure 3 A schematic exploded perspective view of a battery cell provided in some embodiments of the present application; Figure 4 A schematic structural diagram of a first end cover of a battery cell provided in some other embodiments of the present application; Figure 5 for Figure 4 Middle AA section view; Figure 6 for Figure 5 A partial enlarged view of point B in the middle; Figure 7 for Figure 5 A partial enlarged view of point C in the middle; Figure 8 for Figure 5 A partial enlarged view of point D in the middle; Figure 9 A schematic structural diagram of a side panel provided in some embodiments of the present application; Figure 10 A schematic structural diagram of a side panel provided in some other embodiments of the present application; Figure 11 A schematic structural diagram of an energy storage device provided in some embodiments of the present application.

[0094] In some embodiments of the present application, for ease of explanation, a first direction, a second direction, and a third direction are set. The directions of the first direction, the second direction, and the third direction are directions that intersect with each other. Here, intersecting with each other includes intersecting perpendicularly with each other. Figures 3 to 9 In the embodiment shown, the first direction, the second direction, and the third direction are perpendicular to each other for illustration, but those skilled in the art should understand that the embodiments of the present application are not limited to the case where the three directions are perpendicular to each other. In a specific embodiment, the first direction may be the opening direction of the shell, the second direction may be the thickness direction of the side plate, and the third direction may be the direction perpendicular to the large surface of the battery cell. For ease of explanation, as shown in FIG. Figures 3 to 10 As shown by the arrows in FIG, the direction of arrow X is the first direction, the direction of arrow Z is the second direction, and the direction of arrow Y is the third direction. The direction indicated by arrow Z along the third direction is sometimes referred to as "upward," and the opposite direction is referred to as "downward."

[0095] A first aspect of an embodiment of the present application provides a battery cell 1, which includes a shell 2, an end cover 3 and a frame 4. The shell 2 has an opening 2A on at least one side along a first direction (X). The shell 2 also has a accommodating space S, which accommodates an electrode assembly 10. The end cover 3 closes the opening 2A. The frame 4 includes a side plate 5 extending along the first direction (X), and the frame 4 is received in the accommodating space S; along the thickness direction (Z) of the side plate 5, the side plate 5 is arranged between the electrode assembly 10 and the side wall 2B of the shell 2; along the first direction (X), the dimension of one end of the side plate 5 along the thickness direction (Z) of the side plate 5 is smaller than the dimension of the other end of the side plate 5 along the thickness direction (Z) of the side plate 5.

[0096] Optionally, the housing 2 has an opening 2A along the first direction (X), and an end cover 3 corresponds to the opening 2A to close the opening 2A.

[0097] Optionally, the housing 2 has two openings 2A along the first direction (X), and the two end covers 3 correspond to the openings 2A respectively to close the openings 2A.

[0098] Optionally, the side wall 2B is a shell wall of the shell 2. For example, the battery cell 1 may be a rectangular parallelepiped prismatic battery, and the shell wall may be a shell wall of a large surface or other side surfaces.

[0099] Optionally, when viewed along the Y direction, the frame 4 may be a polygon such as a circle, an ellipse, a triangle, a rectangle, etc. Alternatively, the frame 4 may be formed by connecting independent plates end to end, or the frame 4 may be an integrally formed structure.

[0100] Optionally, the side panels 5 can be fixed to the frame 4 by welding, bonding, snap connection, etc.

[0101] Optionally, the side plate 5 is made of insulating resin to insulate the electrode assembly 10 from the shell 2 .

[0102] For example, the side panel 5 can be made of polypropylene (PP), which is easy to process and has low cost.

[0103] Optionally, one or more side panels 5 may be provided in the frame 4 .

[0104] Alternatively, the side panels 5 in the frame 4 may be arranged in pairs, and the paired side panels 5 are parallel to each other.

[0105] Optionally, the side plate 5 can be arranged in the accommodating space S of the shell 2 parallel to the large surface of the battery cell 1, reducing the gap between the shell 2 and the electrode assembly 10 along the Y direction, reducing the shaking amplitude of the electrode assembly 10, and reducing the risk of damage to the electrode assembly 10.

[0106] Alternatively, the side plate 5 may be arranged in the accommodation space S of the housing 2 in parallel with the other side walls 2B of the battery cell 1, as shown in FIG. Figure 5 As shown, the side plate 5 can reduce the gap between the shell 2 and the electrode assembly 10 along the Z direction, reduce the shaking amplitude of the electrode assembly 10, and reduce the risk of damage to the electrode assembly 10.

[0107] Optionally, the side plate 5 can be fitted with the electrode assembly 10. Since the side plate 5 is fitted with the electrode assembly 10, the volume occupied by the frame 4 is reduced, which is more conducive to assembling the frame 4 into the housing 2 and also improves the stability of the electrode assembly 10.

[0108] Optionally, when viewed along the thickness direction (Z) of the side panel 5 , the side panel 5 may be in a rectangular, trapezoidal, triangular, or other shape, which is not limited in the present application.

[0109] For example, Figure 5 As shown, along the first direction, the side panel 5 has a first end 5A and a second end 5B, and the dimension of the first end 5A of the side panel 5 along the thickness direction (Z) of the side panel 5 is smaller than the dimension of the second end 5B of the side panel 5 along the thickness direction (Z) of the side panel 5.

[0110] For example, Figure 5 、 Figure 6 、 Figure 7 As shown, the side plate 5 extends along the X-direction. One end of the side plate 5 is a first end 5A, and the other end is a second end 5B. The thickness D1 of the first end 5A is less than the thickness D2 of the second end 5B. During assembly, the first end 5A can be inserted into the opening 2A before the frame 4 is inserted into the housing 2. The thinner first end 5A reduces the size of the side plate 5 and the frame 4, reducing the impact of the frame 4 on the insertion of the electrode assembly 10 into the housing, and facilitating the assembly of the frame 4 into the housing 2.

[0111] Since the side plate 5 is arranged between the electrode assembly 10 and the shell 2, the side plate 5 can fill the gap between the electrode assembly 10 and the shell 2, reduce the shaking amplitude of the electrode assembly 10, alleviate the external impact on the electrode assembly 10 to a certain extent, and improve the working reliability of the electrode assembly 10.

[0112] In an embodiment of the present application, along the first direction (X), the side panel 5 includes a first section 6 and a second section 7, the first section 6 includes one end, and the second section 7 includes the other end; along the first direction (X), the length of the first section 6 does not exceed half the length of the side panel 5.

[0113] Optionally, the first section 6 may be connected to the second section 7 or may not be connected to the second section 7 .

[0114] For example, Figure 5 、 Figure 9 、 Figure 10 As shown, the first section 6 includes a first end 5A, the second section 7 includes a second end 5B, and the length L1 of the first section 6 does not exceed half of the length L of the side panel 5 .

[0115] Alternatively, the thickness D1 of the first end 5A may be the lowest thickness in the first section 6 , and the thickness D2 of the second end 5B may be the highest thickness in the second section 7 .

[0116] For example, the length L1 of the first section 6 may be 0%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, etc. of the length L of the side panel 5 , which is not limited in the present application.

[0117] Since the length L1 of the first section 6 does not exceed half the length L of the side plate 5 , both the assembly efficiency of the frame 4 and the space utilization of the shell 2 can be taken into account, and the electrode assembly 10 can be more effectively supported.

[0118] In the embodiment of the present application, along the first direction (X), the thickness of the side plate 5 gradually decreases as it moves away from the second section 7 .

[0119] Optionally, when viewed along the Y direction, the shape of the first segment 6 may be a quadrilateral, a right triangle, an isosceles triangle, etc., which is not limited in the present application.

[0120] For example, Figure 9 As shown, the thickness of the side plate 5 gradually decreases along the direction from the second end 5B to the first end 5A.

[0121] As another example, the second section 7 may have a uniform thickness. In the first section 6 , the thickness of the first section 6 gradually decreases as it moves away from the second section 7 , making it convenient to install the frame 4 into the housing 2 along the first direction (X).

[0122] Since the thickness of the side panel 5 gradually decreases, the thickness of the side panel 5 can be gradually changed to adapt to the thickness difference between the first section 6 and the second section 7, avoiding the adverse situation of stress concentration caused by the sudden change in the thickness of the side panel 5, and playing a role in alleviating stress concentration. At the same time, it is more conducive to the assembly of the frame 4 into the shell 2 along the first direction (X), reducing costs and improving assembly efficiency.

[0123] In the embodiment of the present application, a transition section 8 is provided between the first section 6 and the second section 7 along the first direction (X), and the thickness of the transition section 8 gradually decreases as the distance from the second section 7 increases.

[0124] For example, Figure 10 As shown, the transition section 8 is located between the first section 6 and the second section 7 , connecting the first section 6 and the second section 7 , and the thickness of the transition section 8 gradually decreases as it moves away from the second section 7 .

[0125] As another example, in the transition section 8 , the thickness of the end portion connected to the first section 6 is equal to that of the first section 6 , and the thickness of the end portion connected to the second section 7 is equal to that of the second section 7 , thereby avoiding the formation of a step portion that causes stress concentration.

[0126] Because the thickness of the transition section 8 gradually decreases, it smoothly connects the first section 6 and the second section 7, reducing the risk of a step or terrace formed between the two due to the thickness difference, thereby alleviating stress concentration. This also facilitates the assembly of the frame 4 into the housing 2 along the first direction (X), reducing costs while improving assembly efficiency.

[0127] In the embodiments of the present application, Figure 7 As shown, the thickness of the first section 6 is between 0.2 mm and 1 mm, and / or the minimum distance H1 between the first section 6 and the adjacent side wall 2B is between 0.2 mm and 0.6 mm.

[0128] For example, the thickness of the first section 6 may be 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1.0 mm. Other values ​​are not listed here.

[0129] As another example, the distance H1 between the first section 6 and the side wall 2B may be 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, or 0.6 mm. Other values ​​are not listed here.

[0130] Therefore, the thickness of the first section 6 is within an appropriate range, which is conducive to assembling the frame 4 into the shell 2 while reasonably controlling the distance between the side panel 5 and the shell 2, effectively reducing the interference between the side panel 5 and the shell 2, and also reducing the impact of dimensional tolerance during assembly.

[0131] In the embodiment of the present application, the thickness of the second section 7 is between 0.3 mm and 1.5 mm, and / or the distance H2 between the second section 7 and the adjacent side wall 2B is between 0.1 mm and 0.5 mm.

[0132] For example, the thickness of the second section 7 may be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, or 1.5 mm. Other values ​​are not listed here.

[0133] As another example, the distance H2 between the second section 7 and the side wall 2B may be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, or 0.5 mm. Other values ​​are not listed here.

[0134] Optionally, the minimum thickness of the second section 7 may be no less than the maximum thickness of the first section 6 .

[0135] Therefore, the thickness of the second section 7 is within an appropriate range, which is conducive to assembling the frame 4 into the shell 2 while reasonably controlling the distance between the side panel 5 and the shell 2, improving the space utilization inside the shell 2, further alleviating the external impact on the electrode assembly 10, and reducing the impact of dimensional tolerance during assembly.

[0136] In the embodiments of the present application, Figure 8 、 Figure 10 As shown, along the first direction (X), the second section 7 has a straight section 7A, and the length L2 of the straight section 7A is not less than half of the length L of the side plate 5.

[0137] The straight section 7A refers to the thickness direction (Z) of the side plate 5, and the thickness is equal at all places. In the description of the embodiments of the present application, unless otherwise clearly specified and limited, "equal thickness" allows a certain degree of tolerance and / or error, including the situation of being approximately equal.

[0138] For example, the length L2 of the straight section 7A may be 0%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, etc. of the length L of the side panel 5. This application does not limit this.

[0139] Optionally, the straight section 7A may include a second end 5B.

[0140] Optionally, the straight section 7A may be part of the second section 7 or the entire second section 7 .

[0141] Therefore, the side plate 5 can provide stable support in the thickness direction, limit the deformation of the electrode assembly 10, alleviate the impact of external impact on the electrode assembly 10, and further enhance the stability of the frame 4, which is conducive to fixing the position of the electrode assembly 10 and can also control the occupancy of the internal accommodation space S of the shell 2.

[0142] In an embodiment of the present application, the side plate 5 includes a first side plate 51 and a second side plate 52 that are relatively arranged along the thickness direction (Z) of the side plate 5, the electrode assembly 10 is located between the first side plate 51 and the second side plate 52, and the thickness direction (Z) of the side plate 5 is parallel to the large surface of the battery cell 1.

[0143] In a specific embodiment, Figure 3 、 Figure 5As shown, the first side plate 51 and the second side plate 52 are arranged opposite to each other along the Z direction, which reduces the internal space of the housing 2 occupied by the side plates 5 compared to the case where they are arranged opposite to each other along the Y direction.

[0144] In a specific embodiment, the first side plate 51 and the second side plate 52 have the same length along the X direction, so that the shape of the frame 4 is more adaptable to the shape of the housing 2 , and processing and installation are convenient.

[0145] Optionally, the thicknesses of the first side plate 51 and the second side plate 52 may be the same or different, which is not limited in this application.

[0146] Thus, the first side plate 51 and the second side plate 52 can improve the stability of the electrode assembly 10 in the side wall direction of the battery cell 1 , while also reducing the occupancy rate of the internal space of the shell 2 and improving the space utilization rate of the battery cell 1 .

[0147] In the embodiment of the present application, the frame 4 further includes two supporting plates 9 , and the supporting plates 9 , the first side plate 51 and the second side plate 52 enclose and accommodate the electrode assembly 10 .

[0148] In a specific embodiment, Figure 3 、 Figure 5 As shown, the frame 4 includes a first support plate 91 , a second support plate 92 , a first side plate 51 and a second side plate 52 . The first support plate 91 and the second support plate 92 are connected and fixed by the first side plate 51 and the second side plate 52 , and the formed frame 4 accommodates the electrode assembly 10 .

[0149] Optionally, the materials of the support plate 9 and the side plates 5 may be the same, such as polypropylene, or different.

[0150] Optionally, when viewed along the first direction (X), the shape of the support plate 9 may be circular, elliptical, triangular, quadrilateral, etc., which is not limited in the present application.

[0151] Optionally, the support plate 9 can be detachably connected to the side plate 5. For example, during installation, the second support plate 92, the first side plate 51, and the second side plate 52 are first connected. After the electrode assembly 10 is installed in the frame 4, the second support plate 92 and the side plate 5 are fixed. The reverse operation is performed during removal.

[0152] Optionally, the support plate 9 can be fixed to the side plate 5 by welding, bonding, snap connection, etc. This application does not limit this.

[0153] Optionally, the lengths of the first support plate 91 and the second support plate 92 are different, and the length of the first support plate 91 near the first end 5A is smaller than the length of the second support plate 92 near the second end 5B, further reducing the volume occupied by the frame 4 and facilitating the installation of the frame 4 into the shell 2.

[0154] Optionally, the support plate 9 may be fixedly connected to the end cover 3. For example, the first support plate 91 may be fixed to the first end cover 31, and the second support plate 92 may be fixed to the second end cover 32.

[0155] Since the frame 4 further includes two supporting plates 9 , the frame 4 can better accommodate and support the electrode assembly 10 , further improving the working reliability of the electrode assembly 10 .

[0156] In the embodiments of this application, Figure 3 As shown, along the first direction (X), the length of the battery cell 1 is 250 to 400 mm or 600 to 1500 mm.

[0157] For example, the length of the battery cell 1 may be 250 mm, 300 mm, 350 mm, or 400 mm, etc. Other values ​​are not listed here.

[0158] For example, the length of the battery cell 1 may be 600 mm, 650 mm, 700 mm, 750 mm, 800 mm, 850 mm, 900 mm, 950 mm, 1000 mm, 1150 mm, 1200 mm, 1250 mm, 1300 mm, 1350 mm, 1400 mm, 1450 mm, or 1500 mm, etc. Other values ​​are not listed here.

[0159] Of course, those skilled in the art should understand that the arrangement of multiple battery cells 1 is not limited to Figure 2 In the manner shown, multiple battery cells 1 can be arranged and combined in any direction as needed.

[0160] Since the battery cell 1 has a certain length, there is a large gap between the electrode assembly 10 and the shell 2 for easy insertion into the shell. Therefore, the side plate 5 can fill the gap between the electrode assembly 10 and the shell 2 to a certain extent, reduce the shaking amplitude of the electrode assembly 10, alleviate the external impact on the electrode assembly 10, and improve the working reliability of the electrode assembly 10.

[0161] In a specific embodiment, the battery cell 1 is provided with a first end cover 31 , and the first end cover 31 is fixed to the other end of the side plate 5 .

[0162] For example, Figure 4 、 Figure 5 As shown, the battery cell 1 has an opening 2A, and the first end cover 31 closes the opening 2A.

[0163] Optionally, the first end cap 31 may be directly fixed to the second end 5B of the first side panel 51 and the second side panel 52, or may be fixed to the second end 5B via the second support plate 92. The first end cap 31 may be fixed to the second end 5B or the second support plate 92 by welding, bonding, snap connection, etc. This application does not limit this.

[0164] For example, after the frame 4 is secured to the first end cap 31, the first end 5A has a relatively small size, making it easier to install the electrode assembly 10 and the frame 4 into the housing 2 along the first direction (X), with the first end cap 31 sealing the opening 2A. Thus, the first end cap 31 is secured to the frame 4, facilitating the installation of the frame 4 into the housing 2 through the opening 2A along the first direction (X), further enhancing the stability of the frame 4 and the electrode assembly 10 within the housing 2.

[0165] In a specific embodiment, along the first direction (X), the battery cell 1 is provided with a first end cover 31 and a second end cover 32, and the first end cover 31 is fixed to the other end of the side plate 5; the thickness of the first side plate 51 at one end away from the first end cover 31 is less than the thickness of the other end, and the thickness of the second side plate 52 at one end away from the first end cover 31 is less than the thickness of the other end.

[0166] For example, Figure 3 As shown, the battery cell 1 has two openings 2A along the X direction, which are respectively closed by a first end cover 31 and a second end cover 32 . The present application does not limit the position, shape, and size of the first end cover 31 and the second end cover 32 .

[0167] Optionally, the first end cap 31 may be directly fixed to the second end 5B of the first side panel 51 and the second side panel 52, or may be fixed to the second end 5B via the second support plate 92. The first end cap 31 may be fixed to the second end 5B or the second support plate 92 by welding, bonding, snap connection, etc. This application does not limit this.

[0168] Illustratively, after the frame 4 is fixed to the first end cover 31, since the first end 5A has a smaller size, it is convenient to install the electrode assembly 10 and the frame 4 into the shell 2 along the first direction (X), and the first end cover 31 and the second end cover 32 close the two openings 2A.

[0169] Thus, the first end cap 31 is fixed to the frame 4, which is conducive to the frame 4 being inserted into the shell 2 from the opening 2A close to the first end cap 31 along the first direction (X), and further improves the stability of the frame 4 and the electrode assembly 10 inside the shell 2.

[0170] A second aspect of the present application provides a battery device 100 , including a box body 103 and a plurality of battery cells 1 according to the first aspect of the present application contained in the box body 103 , wherein the side panels 5 are parallel to the bottom surface of the box body 103 .

[0171] Since the battery device 100 includes the battery cell 1 disclosed in the first aspect of the embodiment of the present application, it can alleviate the impact vibration of the electrode assembly 10 inside the battery cell 1 to a certain extent, and at the same time facilitate the assembly of the electrode assembly 10 and the frame 4 into the shell 2, reducing the risk of accidental damage during assembly, which is beneficial to the working stability of the battery device 100.

[0172] For example, Figure 2 、 Figure 3 As shown, the bottom surface of the box 103 serves as the supporting surface of the bottom plate 101, the battery cells 1 extend along the first direction (X), and the side panels 5 are parallel to the supporting surface of the bottom plate 101. This can improve the flexibility of the battery cell 1 configuration and effectively utilize the space in the box 103.

[0173] A third aspect of the embodiments of the present application provides an electrical device, which includes the battery device 100 of the second aspect of the embodiments of the present application for providing electrical energy.

[0174] For example, the electric device is a vehicle 1000, such as Figure 1 As shown, a battery device 100 is provided inside the vehicle 1000 , and the battery device 100 can be used to supply power to the vehicle 1000 .

[0175] Since the electrical device includes the battery device 100 disclosed in the second aspect of the embodiment of the present application, it can alleviate the impact vibration of the electrode assembly 10 inside the battery cell 1 to a certain extent, and at the same time facilitate the assembly of the electrode assembly 10 and the frame 4 into the shell 2, reducing the risk of accidental damage during assembly, and is beneficial to the working stability of the electrical device.

[0176] A fourth aspect of the present application provides an energy storage device 2000, such as Figure 11 As shown, the energy storage device 2000 includes multiple battery cells 1 according to the first aspect of the embodiment of the present application or multiple battery devices 100 according to the second aspect of the embodiment of the present application. The battery cells 1 or the battery devices 100 are used to store or provide electrical energy.

[0177] Since the energy storage device 2000 includes the battery cell 1 disclosed in the first aspect of the embodiment of the present application or the battery device 100 disclosed in the second aspect of the embodiment of the present application, it can alleviate the impact vibration of the electrode assembly 10 inside the battery cell 1 to a certain extent, and at the same time facilitate the assembly of the electrode assembly 10 and the frame 4 into the shell 2, reducing the risk of accidental damage during assembly, which is beneficial to the working stability of the energy storage device 2000.

[0178] The specific implementation is described below with reference to the accompanying drawings.

[0179] In this embodiment, in order to protect the electrode assembly 10 from damage and improve the life of the battery cell 1, Figure 5As shown, the side plate 5 has unequal wall thicknesses, with the first end 5A having a thinner wall thickness than the second end 5B. The thinner wall thickness of the first end 5A facilitates insertion into the housing, while the thicker wall thickness of the second end 5B secures the electrode assembly 10. The side plate 5 has a first section 6 including the first end 5A and a second section 7 including the second end 5B. The spacing between the side plate 5 and the side wall 2B is: 0.1-0.5 mm on the side of the first section 6 (H1); 0.2-0.6 mm on the side of the second section 7 (H2).

[0180] For example, the second end 5B of the side panel 5 is heat-fused to the plastic under the first end cap 31, and the first end 5A of the side panel 5 is connected to the first support plate 91. When inserting the electrode assembly 10 into the shell, the electrode assembly 10 on the side of the first support plate 91 is inserted into the shell first. The first section 6 of the side panel 5 is inserted into the shell first, leaving a large gap with the shell 2, facilitating insertion. The second section 7 is inserted later, leaving a small gap with the shell 2, facilitating the fixing of the electrode assembly 10.

[0181] Exemplarily, the side panels 5 and the support plate 9 are made of plastic polymer material, preferably polypropylene (PP), which has the characteristics of low cost and insulation.

[0182] For example, the thickness of the first section 6 of the thin-walled side plate 5 is preferably 0.2-1 mm, and the thickness of the second section 7 of the side plate 5 is preferably 0.3-1.5 mm. The side plate 5 thickness within the appropriate range can play a certain role in fixing the electrode assembly 10 without taking up too much space.

[0183] For example, the first section 6 of the side panel 5 may be connected to the second section 7 or may be connected to the second section 7 via a transition section 8, thereby meeting different processing requirements.

[0184] Exemplarily, the length L1 of the first section 6 is 0 to 50% of the length L of the side panel 5 .

[0185] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0186] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0187] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery cell, characterized in that: The battery cell comprises: A shell having an opening on at least one side of the shell along the first direction, and further comprising a receiving space for receiving the electrode assembly. an end cap, the end cap closing the opening, a frame, the frame comprising a side plate extending along a first direction, the frame being received in the accommodation space; the side plate being disposed between the electrode assembly and a side wall of the housing along a thickness direction of the side plate; Along the first direction, a dimension of one end of the side plate along the thickness direction of the side plate is smaller than a dimension of the other end of the side plate along the thickness direction of the side plate.

2. The battery cell according to claim 1, wherein: Along the first direction, the side panel includes a first section and a second section, the first section includes the one end, and the second section includes the other end; Along the first direction, the length of the first section does not exceed half the length of the side panel.

3. The battery cell according to claim 2, characterized in that: Along the first direction, the thickness of the side plate gradually decreases as it moves away from the second section.

4. The battery cell according to claim 2, characterized in that Along the first direction, a transition section is provided between the first section and the second section, and a thickness of the transition section gradually decreases as the distance from the second section increases.

5. The battery cell according to claim 3, characterized in that: Along the first direction, a transition section is provided between the first section and the second section, and a thickness of the transition section gradually decreases as the distance from the second section increases.

6. The battery cell according to any one of claims 2 to 5, characterized in that: The thickness of the first section is between 0.2 mm and 1 mm, and / or the distance between the first section and the adjacent side wall is between 0.2 mm and 0.6 mm.

7. The battery cell according to any one of claims 2 to 5, characterized in that: The thickness of the second section is between 0.3 mm and 1.5 mm, and / or the distance between the second section and the adjacent side wall is between 0.1 mm and 0.5 mm.

8. The battery cell according to claim 2, characterized in that Along the first direction, the second section has a straight section, and the length of the straight section is not less than half the length of the side plate.

9. The battery cell according to claim 1 or 2, characterized in that: The side plate includes a first side plate and a second side plate arranged opposite to each other along the thickness direction of the side plate. The electrode assembly is located between the first side plate and the second side plate. The thickness direction of the side plate is parallel to the large surface of the battery cell.

10. The battery cell according to claim 9, characterized in that The battery cell is provided with a first end cover, and the first end cover is fixed to the other end of the side plate.

11. The battery cell according to claim 9, characterized in that Along the first direction, the battery cell is provided with a first end cover and a second end cover, and the first end cover is fixed to the other end of the side plate; The thickness of one end of the first side plate away from the first end cover is smaller than the thickness of the other end thereof, and the thickness of one end of the second side plate away from the first end cover is smaller than the thickness of the other end thereof.

12. The battery cell according to claim 9, characterized in that The frame further includes two supporting plates, and the supporting plates, the first side plates and the second side plates enclose and accommodate the electrode assembly.

13. The battery cell according to any one of claims 1 to 5, 8, 10, and 11, characterized in that: Along the first direction, the length of the battery cell is 250 to 400 mm or 600 to 1500 mm.

14. A battery device, characterized in that: The invention comprises a case and a plurality of battery cells according to any one of claims 1 to 13 accommodated in the case.

15. The battery device according to claim 14, characterized in that The side panels are parallel to the bottom surface of the box body.

16. An electrical device, characterized in that: The electrical device comprises the battery device according to claim 14 or 15 for providing electrical energy.

17. An energy storage device, characterized in that: The battery cell comprises a plurality of battery cells according to any one of claims 1 to 13 or a plurality of battery devices according to claim 14 or 15, wherein the battery cells or the battery devices are used to store or provide electrical energy.

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