Battery cell manufacturing method, battery cell, battery and electric device

Abstract

The invention discloses a manufacturing method of a battery monomer, the battery monomer, a battery and a power utilization device. The invention relates to a manufacturing method of a battery monomer. The manufacturing method of the battery monomer comprises the following steps: connecting an electrode leading-out piece of a naked battery cell with an electrode part; the connected electrode lead-out piece is bent, so that the naked battery cell enters the containing space of the shell through an opening, and the opening of the shell is the side face with the largest area of the shell; and the top cover is connected with the shell so as to seal the opening. According to the battery cell, the bare battery cell of the battery cell can be conveniently installed under the condition that the electrode part is not arranged on the top cover.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a method for manufacturing a battery cell, a battery cell, a battery, and an electrical device. Background Art

[0002] Since rechargeable batteries have the advantages of high energy density, high power density, many cycles and long storage time, they have been widely used in electric vehicles, mobile devices or power tools. Existing battery cells generally include bare cells, shells, top covers and electrode components. The electrode components are arranged on the top cover. When the battery cell is connected to the top cover, it forms an electrical connection with the electrode components and is installed to the shell along with the top cover. However, when the electrode components are not arranged on the top cover, the bare cell is not easy to install. Summary of the invention

[0003] In view of the above problems, the present application provides a method for manufacturing a battery cell, a battery cell, a battery and an electrical device, which can solve the problem that the battery cell of the battery cell is difficult to install when the electrode component is not arranged on the top cover.

[0004] In a first aspect, the present application provides a battery cell, which includes a bare cell, a top cover and a shell, wherein the shell has an opening, the shell is connected to the top cover, the top cover is provided with an opening and forms an accommodation space with the shell, the bare cell is arranged in the accommodation space, the opening is located on a side of the shell with the largest area, an electrode lead-out piece is provided on one side of the bare cell, the shell includes an electrode component or the shell is connected to the electrode component, the electrode lead-out piece is connected to the electrode component, and the electrode lead-out piece is a bent structure.

[0005] Through the above method, the bare cell can be loaded into the shell through the opening on the side of the shell with the largest area, and is well connected with the electrode components on the shell, so that the battery cell can be efficiently assembled. At the same time, the bent structure of the electrode lead-out piece can make the electrode lead-out piece structure more compact and occupy less space, which is conducive to reducing the gap between the bare cell and the shell, and improving the energy density of the battery cell per unit volume.

[0006] In some embodiments, the electrode lead-out member includes a pole ear, which is disposed on one side of the bare battery cell, and the pole ear connects the bare battery cell and the electrode component, and the pole ear is a bent structure.

[0007] Through the above method, the bare battery cell can be conveniently connected to the electrode component through the tab to form a current loop.

[0008] In some embodiments, the electrode lead-out member includes a pole ear and a connecting sheet. The pole ear is arranged on one side of the bare battery cell. One end of the connecting sheet is connected to the pole ear, and the other end of the connecting sheet is connected to the electrode component. The pole ear and / or the connecting sheet are bent structures.

[0009] Through the above method, the tabs arranged on the bare battery cell do not need to be directly connected to the electrode components, the tab connection methods are more diverse, and the battery cell installation is more flexible.

[0010] In some embodiments, the connecting sheet includes a first connecting portion connected to the electrode tab and a second connecting portion connected to the electrode component, the first connecting portion is bent relative to the second connecting portion, and the electrode tab extends between the first connecting portion and the second connecting portion.

[0011] Through the above method, at least part of the tab can be located in the gap between the first connection part and the second connection part formed by the bending of the first connection part. The tab and the connecting sheet are compact in structure and can occupy less accommodation space. The volume proportion of the bare cell in the accommodation space can be higher, which is conducive to improving the energy density of the battery cell.

[0012] In some embodiments, the connecting plate includes a first connecting plate and a second connecting plate, one end of the first connecting plate is connected to the electrode ear, and the other end is connected to the second connecting plate, one end of the second connecting plate is connected to the first connecting plate, and the other end is connected to the electrode component, and at least one of the electrode ear, the first connecting plate, and the second connecting plate is a bent structure.

[0013] Through the above method, the first connecting sheet and the second connecting sheet make the connection between the electrode tab and the electrode component more diverse, and the battery cell installation is more flexible.

[0014] In some embodiments, the shell includes a bottom plate and a plurality of side plates, wherein the side plates extend along the periphery of the bottom plate and together with the bottom plate form a receiving space, and an electrode component is disposed on at least one of the side plates.

[0015] Through the above method, the shell can well accommodate the bare battery cell. At the same time, the electrode component is arranged on the side plate, which is more conducive to the connection between the electrode component and the pole ear, and the battery cell structure is simplified. In some embodiments, the distance between the bare battery cell and the side plate of the shell where the electrode component is not arranged is 0.5mm-2mm.

[0016] Through the above method, a smaller gap can be formed between the bare cell and the side plate without electrode components, and the bare cell is further confined in the accommodation space, making it more difficult for the bare cell to shake, thereby improving the stability of the battery cell. At the same time, the bare cell occupies a larger volume in the battery cell, which is conducive to increasing the amount of energy that can be stored in the battery cell per unit volume.

[0017] In some embodiments, a support plate is disposed between the bare battery cell and a side plate of the shell where no electrode components are disposed.

[0018] Through the above method, the support plate can fill the gap between the bare battery cell and the side plate of the shell, thereby reducing the shaking of the bare battery cell in the shell and making the installation of the bare battery cell more stable.

[0019] In some embodiments, the support plate includes a bottom support plate, which is disposed between the bare battery cell and a side plate in the shell that is disposed opposite to the side plate on which the electrode component is disposed.

[0020] Through the above method, the bottom support plate can fill the gap between the bare battery cell and the side plate in the shell that is arranged opposite to the side plate with the electrode component, which is helpful to reduce the shaking of the bare battery cell in the shell and make the installation of the bare battery cell more stable.

[0021] In some embodiments, the support plate includes a side support plate, which is disposed between the bare battery cell and a side plate in the shell adjacent to the side plate on which the electrode component is disposed.

[0022] Through the above method, the side support plate can fill the gap between the bare battery cell and the side plate in the shell adjacent to the side plate with the electrode component, which is helpful to reduce the shaking of the bare battery cell in the shell and make the installation of the bare battery cell more stable.

[0023] In some embodiments, the shell includes a bottom plate and multiple side plates, which extend along the periphery of the bottom plate and together with the bottom plate form a accommodating space. A flange edge is connected to the side of the side plate away from the bottom plate, and the flange edge extends from the end of the side plate away from the bottom plate to the outside of the accommodating space, and the top cover is connected to the flange edge.

[0024] Through the above method, the top cover is connected to the flange edge of the shell. By setting the connection position at the flange edge, the distance between the connection position of the top cover and the flange edge and the bare battery cell can be increased, thereby avoiding damage to the bare battery cell due to light leakage during the connection of the top cover and the flange edge. In addition, it can also reduce the damage to the bare battery cell caused by particulate matter falling into the bare battery cell, thereby protecting the bare battery cell and improving the reliability and safety of the battery cell.

[0025] In some embodiments, the side panel is connected to the bottom panel via a first transition angle, and the side panel is connected to the flange edge via a second transition angle.

[0026] Through the above method, the first turning angle and the second turning angle can improve the stability of the shell, thereby improving the stability of the top cover connected to the flange edge, thereby being able to electrically protect the bare battery cell.

[0027] In some embodiments, the radius of the second transition angle is less than or equal to 0.2 mm. By the above method, the connection stability between the side plate and the flange edge is increased.

[0028] In some embodiments, the side panels are arranged around the bottom panel, the flange edges are arranged around the side panels, and the flange edges are connected to the top cover.

[0029] Through the above method, each side panel is provided with a corresponding flange edge, and the top cover is connected to all the flange edges, so that the connection positions are all located on the flange edges, thereby improving the protection performance of the bare battery cell.

[0030] In some embodiments, the edge of the top cover is aligned with the edge of the flange away from the edge of the side panel.

[0031] By adopting the above-mentioned method, it is prevented that the top cover and / or the flange edge punctures the adjacent battery cells or the battery box, etc.; and the structure of the battery cell itself can be made more compact, which is convenient for subsequent series or parallel connection of multiple battery cells, etc.

[0032] In some embodiments, the housing is an integrally formed structure.

[0033] Through the above method, the shell is more stable, thereby improving the stability of the flange edge of the top cover connected to the shell.

[0034] In some embodiments, the maximum distance between the edge of the flange away from the side panel and the outer surface of the side panel is no greater than 5 mm.

[0035] Through the above method, the distance between the actual connection position between the flange edge and the top cover and the bare cell is limited, thereby reducing damage to the bare cell caused by laser leakage and falling of particulate matter.

[0036] In a second aspect, the present application provides a battery, the battery comprising the battery cell in the above embodiment.

[0037] In a third aspect, the present application provides an electrical device, which includes the battery of the above embodiment, and the battery is used to supply power to the electrical device.

[0038] In a fourth aspect, the present application provides a method for manufacturing a battery cell, which includes: connecting the electrode lead-out piece of a bare cell to an electrode component; bending the electrode lead-out piece after the connection is completed so that the bare cell enters the accommodating space of the shell through an opening, and the opening of the shell is the side of the shell with the largest area; connecting the top cover to the shell to close the opening.

[0039] Through the above method, the bare cell can form a stable electrical connection with the electrode component, and can be directly installed in the housing space of the shell by bending the electrode lead-out piece. The bare cell can be easily installed with the electrode component arranged in the shell, and the battery cell can be efficiently assembled.

[0040] In some embodiments, the shell includes a bottom plate and a plurality of side plates, the side plates extend along the periphery of the bottom plate and together with the bottom plate form a receiving space, the opening is arranged opposite to the bottom plate, and the electrode component is the bottom plate or the side plate of the shell.

[0041] Through the above method, the pole ear is directly connected to the bottom plate or the side plate, the connection structure is simple, and the production is convenient. At the same time, it is also beneficial to reduce the structure between the bare battery cell and the shell, and the volume proportion of the bare battery cell in the accommodating space is increased, thereby enhancing the energy density of the battery cell. In some embodiments, the shell includes a bottom plate and a plurality of side plates, the side plates extend along the periphery of the bottom plate, and together with the bottom plate, form an accommodating space, the opening is arranged opposite to the bottom plate, and the electrode component is arranged on at least one side plate.

[0042] Through the above method, the electrode component is arranged on the side plate, which is more conducive to the connection between the electrode component and the pole ear, and the battery cell structure is simplified.

[0043] In some embodiments, the electrode lead-out member includes a tab, and the step of connecting the electrode lead-out member of the bare cell to the electrode component includes: welding the tab of the bare cell to the electrode component.

[0044] Through the above method, the bare battery cell can conveniently connect the tabs to the electrode components and form a current loop.

[0045] In some embodiments, the electrode lead-out member includes a tab and a connecting piece, and the step of connecting the electrode lead-out member of the bare cell to the electrode component includes: welding the tab of the bare cell to the connecting piece; and welding the connecting piece to the electrode component.

[0046] By using the above method, the tab does not need to be directly connected to the electrode component, the tab can be more flexibly connected to the electrode component, and the battery cell can be installed flexibly. At the same time, the connecting piece can share the pulling force between the tab and the electrode component, and the tab is not easy to break.

[0047] In some embodiments, the electrode lead-out member includes a tab, a first connecting sheet and a second connecting sheet, and the step of connecting the electrode lead-out member of the bare battery cell to the electrode component includes: welding the tab of the bare battery cell to the first connecting sheet; welding the first connecting sheet to the second connecting sheet; welding the second connecting sheet to the electrode component.

[0048] Through the above method, the tab and the electrode component are connected through the first connecting sheet and the second connecting sheet, and the first connecting sheet and the second connecting sheet can better share the tension between the tab and the electrode component, and the tab is not easy to break. At the same time, the connection between the tab and the electrode component can be divided into multiple steps, and the battery cell installation is more flexible.

[0049] In some embodiments, the shell includes a bottom plate, and the opening is arranged opposite to the bottom plate. Before the step of connecting the electrode lead-out piece of the bare battery cell to the electrode component, the step also includes: making a preset angle between the bare battery cell and the bottom plate.

[0050] Through the above method, the preset angle enables the bare cell and the electrode component to have a better welding posture, so that the welding quality of the bare cell and the electrode component is better. At the same time, the preset angle enables the bare cell to be in a more convenient bending position, thereby improving the efficiency of installing the bare cell into the accommodating space.

[0051] In some embodiments, the preset angle is not less than 45 degrees and not greater than 135 degrees.

[0052] Through the above method, the bare battery cell and the electrode component can be welded with a better welding posture, the welding heat input is more uniform, the base material is fused more fully, the probability of cold welding is reduced, and the weld quality is better.

[0053] In some embodiments, in the step of connecting the electrode lead-out pieces of the bare cell to the electrode components, the bare cell is perpendicular to the bottom plate.

[0054] Through the above method, the contact area between the bare battery cell and the electrode component is larger, the welding posture is good, the welding heat input is more uniform, the base material is more fully fused, and the weld quality is better.

[0055] In some embodiments, before the step of connecting the top cover to the shell to close the opening, the step further includes: placing a support plate between the shell and at least one side of the bare battery cell where no electrode lead-out piece is provided.

[0056] Through the above method, the support plate can fill the gap between the bare battery cell and the side plate of the shell, thereby reducing the shaking of the bare battery cell in the shell and making the installation of the bare battery cell more stable.

[0057] In some embodiments, a flange is provided on one side of the shell facing the top cover, and the flange extends away from the accommodating space. The step of connecting the top cover to the shell to close the opening includes: covering the opening with the top cover and welding the top cover to the flange.

[0058] Through the above method, the distance between the connection position of the top cover and the flange edge and the battery cell is increased, which is beneficial to reduce the probability of battery cell damage caused by light leakage during the connection process of the top cover and the flange edge; in addition, it can also reduce the damage to the battery cell caused by particulate matter falling into the battery cell, thereby protecting the battery cell and improving the reliability and safety of the battery cell.

[0059] In some embodiments, after the steps of covering the opening with the top cover and welding the top cover to the flange edge, the steps further include: cutting the welded flange edge and the top cover, removing the edge of the flange edge away from the accommodating space, and removing the edge of the top cover.

[0060] By adopting the above method, the space occupied by the flange edge and the top cover can be reduced, thereby reducing the space occupied by the battery cell.

[0061] In some embodiments, before the step of welding the electrode lead-out piece of the bare battery cell to the electrode component, the step further includes: wrapping an insulating film on the outer surface of the bare battery cell.

[0062] Through the above method, the insulation performance of the outer surface of the bare battery cell is better, and at the same time the insulating film protects the outer surface of the bare battery cell, reducing the probability of the bare battery cell being bumped and scratched when it is installed in the shell.

[0063] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. In addition, the same reference numerals are used throughout the drawings to represent the same components.

[0065] In the figure:

[0066] Figure 1 is a schematic diagram of the structure of a vehicle according to one or more embodiments;

[0067] Figure 2 is an exploded schematic diagram of a battery according to one or more embodiments;

[0068] Figure 3 is a schematic diagram of an exploded structure of a battery cell according to one or more embodiments;

[0069] Figure 4 is a first structural schematic diagram of a battery cell according to one or more embodiments;

[0070] Figure 5 yes Figure 4 A is an enlarged schematic diagram;

[0071] Figure 6 yes Figure 4 A is a schematic diagram of another implementation method;

[0072] Figure 7 is a second structural schematic diagram of a battery cell according to one or more embodiments;

[0073] Figure 8 yes Figure 7 Schematic cross-section of the middle BB;

[0074] Fig. 9 yes Figure 7 Schematic cross-section of the CC;

[0075] Fig.10 is a third structural schematic diagram of a battery cell according to one or more embodiments;

[0076] Fig.11 yes Fig.10 A magnified schematic diagram of D in the middle;

[0077] Fig.12 is a fourth structural schematic diagram of a battery cell according to one or more embodiments;

[0078] Fig.13 yes Fig.12 Middle E is an enlarged schematic diagram;

[0079] Fig.14 is a fifth structural schematic diagram of a battery cell according to one or more embodiments;

[0080] Fig.15 is a cross-sectional view of a battery cell according to one or more embodiments;

[0081] Fig.16 is a flowchart according to one or more embodiments;

[0082] Fig.17 is another flowchart according to one or more embodiments;

[0083] Fig.18 is a schematic diagram of other processes according to one or more embodiments;

[0084] Fig.19 is another flowchart according to one or more embodiments.

[0085] The reference numerals in the specific implementation manner are as follows:

[0086] 1000, vehicle; 200, controller; 300, motor; 100, battery; 10, housing; 11, first part; 12, second part;

[0087] 20. Battery cell; 21. Shell; 212. Accommodation space; 2121. Opening; 213. Bottom plate; 214. Side plate; 2141. Flange; 22. Bare cell; 221. Electrode lead-out piece; 2211. Tab; 2212. Connecting piece; 2212a. First connecting part; 2212b. Second connecting part; 2212c. First connecting piece; 2212d. Second connecting piece; 23. Support plate; 231. Bottom support plate; 232. Side support plate; 24. Top cover; 25. Electrode component. DETAILED DESCRIPTION

[0088] The following is a detailed description of the embodiments of the technical solution of the present application. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0089] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field 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" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0090] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, unless otherwise clearly and specifically defined, the term "multiple" refers to more than two (including two), similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0091] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0092] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0093] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0094] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0095] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0096] During the assembly process of the battery cell, the bare cell needs to be placed in the shell and the bare cell needs to be electrically connected to the electrode component. In the related art, the electrode component is arranged on the top cover, and the bare cell is electrically connected to the electrode component when connected to the top cover, and is installed to the shell along with the top cover. However, when the electrode component is not arranged on the top cover, the bare cell cannot be electrically connected to the electrode component when connected to the top cover, and the welding posture between the bare cell and the electrode component changes, making it difficult to complete the installation.

[0097] Based on the above considerations, in order to solve the technical problems existing in battery cells in the prior art, the present application proposes a method for manufacturing battery cells, which can enable the bare cells of the battery cells to be easily installed when the electrode components are arranged on the shell and the top cover is located on the side with the largest area of ​​the bare cells.

[0098] The present application provides an electric device, which may include but is not limited to mobile phones, tablets, computers, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc. Among them, the electric device may include a battery, and the electric device may provide electric energy through the battery to realize the corresponding function of the electric device.

[0099] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0100] Please refer to Figure 1 , Figure 1is a schematic diagram of the structure of a vehicle according to one or more embodiments.

[0101] The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and operating power requirements of the vehicle 1000 during driving.

[0102] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve 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.

[0103] In order to improve the performance of the electrical device, the present application also provides a battery 100. Figure 2 , Figure 2 An exploded view of a battery 100 provided for some embodiments of the present application. The shape of the battery 100 includes but is not limited to a square. In other embodiments, the shape of the battery 100 may also be cylindrical, square, or any other shape. An energy storage device is a type of battery 100, which may be used as a power grid, or in scenarios such as home life or business, for storing and / or releasing electrical energy. The energy storage device may be an energy storage cabinet, an energy storage container, or the like.

[0104] In some embodiments, the battery 100 may include a case 10 and a battery cell 20, and the battery cell 20 is contained in the case 10. The case 10 is used to provide a storage space for the battery cell 20, and the case 10 may adopt a variety of structures. In some embodiments, the case 10 may include a first part 11 and a second part 12, and the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space for accommodating the battery cell 20. The second part 12 may be a hollow structure with one end open, and the first part 11 may be a plate-like structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a storage space; the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the case 10 formed by the first part 11 and the second part 12 may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0105] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0106] Each battery cell 20 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0107] The battery cell 20 includes a bare cell, which can be made in two ways: laminated and wound. That is, the battery 100 is divided into laminated cells and wound cells. Laminated cells have uniform current collection, small internal resistance, and high specific power, but they require extremely high mold precision, high equipment investment, and complex processes, resulting in low production efficiency. Wound cells are easy to make, and the production and assembly processes require average equipment precision, high production efficiency, and low cost. In terms of performance, wound batteries have excellent high and low temperature performance, very fast charging, ultra-long life, stable high output voltage, strong structure, and strong shock resistance. Please refer to Figure 3 , Figure 3 2 is a schematic diagram of the exploded structure of a battery cell according to one or more embodiments. A battery cell 20 is the smallest unit of a battery. The battery cell 20 includes a top cover 24, a housing 21, a bare cell 22, and other functional components.

[0108] The top cover 24 refers to a component that covers the opening 2121 of the shell 21 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the top cover 24 can be adapted to the shape of the shell 21 to match the shell 21. Optionally, the top cover 24 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the top cover 24 is not easy to deform when it is squeezed and collided, so that the battery cell 20 can have a higher structural strength and the safety performance can also be improved. The material of the top cover 24 can also be a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, the top cover 24 can also be provided with a breathable valve assembly for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. In some embodiments, an insulating member can also be provided on the inner side of the top cover 24, and the insulating member can be used to isolate the electrical connection components in the shell 21 from the top cover 24 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0109] The shell 21 is a component used to cooperate with the top cover 24 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the bare battery cell 22, the electrolyte and other components. The shell 21 and the top cover 24 can be independent components, and an opening 2121 can be set on the shell 21, and the internal environment of the battery cell 20 is formed by covering the top cover 24 at the opening 2121. Without limitation, the top cover 24 and the shell 21 can also be integrated. Specifically, the top cover 24 and the shell 21 can form a common connection surface before other components are put into the shell, and when the interior of the shell 21 needs to be encapsulated, the top cover 24 is covered with the shell 21. The shell 21 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 21 can be determined according to the specific shape and size of the bare battery cell 22. The material of the shell 21 can be various, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0110] The bare cell 22 is a component in the battery cell 20 where electrochemical reactions occur. One or more bare cells 22 may be contained in the housing 21. The bare cell 22 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the cell body of the bare cell 22, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute a tab 2211. During the charge and discharge process of the battery cell 20, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab 2211 connects the electrode component 25 to form a current loop.

[0111] See also Figures 4 to 6 , Figure 4 is a first structural schematic diagram of a battery cell according to one or more embodiments; Figure 5 yes Figure 4 A is an enlarged schematic diagram; Figure 6 yes Figure 4 Another embodiment of the invention is shown in Figure A. Figures 1 to 3 According to some embodiments of the present application, the present application also provides a battery cell 20. The battery cell 20 includes a bare cell 22, a top cover 24 and a shell 21. The shell 21 has an opening 2121. The shell 21 is connected to the top cover 24, and the top cover 24 is covered with the opening 2121 to form an accommodating space 212. The bare cell 22 is arranged in the accommodating space 212, and the opening 2121 is located on the side of the shell 21 with the largest surface area. An electrode lead-out piece 221 is arranged on one side of the bare cell 22, and the shell 21 includes an electrode component 25 or the shell 21 is connected to the electrode component 25, and the electrode lead-out piece 221 is connected to the electrode component 25, and the electrode lead-out piece 221 is a bent structure.

[0112] The opening 2121 is located on the side of the shell 21 with the largest surface area, which means that the plane where the opening 2121 is located is the plane with the largest area on the outer surface of the shell 21. The area of ​​the plane where the opening 2121 is located on the outer surface of the shell 21 is the same as the surface area of ​​the surface of the top cover 24 away from the shell 21. The electrode lead-out piece 221 is conductive. The electrode component 25 can be integrally provided with the shell 21. The electrode component 25 can also be separately provided with the shell 21 and connected to the shell 21. The bending angle of the electrode lead-out piece 221 includes but is not limited to 90°, 180°, etc.

[0113] Through the above method, the bare cell 22 can be loaded into the shell 21 through the opening 2121 located on the side of the shell 21 with the largest area, and is well connected with the electrode component 25 located on the shell 21, so that the battery cell 20 can be efficiently assembled. At the same time, the electrode lead-out member 221 is a bent structure, which can make the electrode lead-out member 221 more compact and occupy less space, which is conducive to reducing the gap between the bare cell 22 and the shell 21, and improving the energy density of the battery cell 20 per unit volume.

[0114] According to some embodiments of the present application, the electrode lead-out member 221 includes a pole ear 2211 , which is disposed on one side of the bare battery cell 22 , and the pole ear 2211 connects the bare battery cell 22 and the electrode component 25 , and the pole ear 2211 is a bent structure.

[0115] Through the above method, the bare cell 22 can be conveniently connected to the electrode component 25 through the tab 2211 to form a current loop.

[0116] See also Figures 7 to 9 , Figure 7 is a second structural schematic diagram of a battery cell according to one or more embodiments; Figure 8 yes Figure 7 Schematic cross-section of the middle BB; Fig. 9 yes Figure 7 According to some embodiments of the present application, the electrode lead-out member 221 further includes a pole ear 2211 and a connecting piece 2212, the pole ear 2211 is arranged on one side of the bare cell 22, one end of the connecting piece 2212 is connected to the pole ear 2211, and the other end of the connecting piece 2212 is connected to the electrode component 25, and the pole ear 2211 and / or the connecting piece 2212 are bent structures.

[0117] Specifically, the connecting piece 2212 is made of a conductive material. The shape of the connecting piece 2212 can be set according to actual conditions, for example, the connecting piece 2212 can be in the shape of a thin sheet. The bending conditions of the pole ear 2211 and / or the connecting piece 2212 can be set according to actual conditions. For example, in one specific embodiment, the pole ear 2211 is a bent structure. In another specific embodiment, the connecting piece 2212 is a bent structure. In another other specific embodiment, the pole ear 2211 and the connecting piece 2212 are bent structures.

[0118] Through the above method, the tab 2211 does not need to be directly connected to the electrode component 25, the connection method of the tab 2211 is more diverse, and the installation of the battery cell 20 is more flexible.

[0119] In some embodiments, the connecting piece 2212 includes a first connecting portion 2212a connected to the pole ear 2211 and a second connecting portion 2212b connected to the electrode component 25, the first connecting portion 2212a is bent relative to the second connecting portion 2212b, and the pole ear 2211 extends between the first connecting portion 2212a and the second connecting portion 2212b.

[0120] Specifically, a gap is formed between the first connection portion 2212a and the second connection portion 2212b. The tab 2211 at least partially extends into the gap. The first connection portion 2212a and the second connection portion 2212b may be integrally formed or separately formed.

[0121] By the above method, at least part of the tab 2211 can be located in the gap between the first connection part 2212a and the second connection part 2212b formed by the bending of the first connection part 2212a. The tab 2211 and the connecting piece 2212 are compact in structure and can occupy less of the accommodation space 212. The volume of the bare cell 22 in the accommodation space 212 can be higher, which is beneficial to improve the energy density of the battery cell 20.

[0122] According to some embodiments of the present application, the tab 2211 is connected to a side of the first connection portion 2212 a facing the bare cell 22 .

[0123] Through the above method, the connection position of the tab 2211 is flexible and the battery cell 20 is easy to assemble.

[0124] According to some embodiments of the present application, the connecting piece 2212 includes a first connecting piece 2212c and a second connecting piece 2212d, one end of the first connecting piece 2212c is connected to the pole ear 2211, and the other end is connected to the second connecting piece 2212d, one end of the second connecting piece 2212d is connected to the first connecting piece 2212c, and the other end is connected to the electrode component 25, and at least one of the pole ear 2211, the first connecting piece 2212c, and the second connecting piece 2212d is a bent structure.

[0125] Specifically, the shapes of the first connecting piece 2212c and the second connecting piece 2212d can be set according to actual conditions. For example, the first connecting piece 2212c is in the shape of a thin sheet, and the second connecting piece 2212d is in the shape of a thin sheet. The bending conditions of the pole tab 2211, the first connecting piece 2212c, and the second connecting piece 2212d can be set according to actual conditions. For example, in one specific embodiment, the pole tab 2211 is a bending structure. In another specific embodiment, the pole tab 2211 and the first connecting piece 2212c are a bending structure. In another other specific embodiment, the first connecting piece 2212c and the second connecting piece 2212d are a bending structure.

[0126] Through the above method, the first connecting piece 2212c and the second connecting piece 2212d make the connection between the tab 2211 and the electrode component 25 more diverse, and the battery cell 20 can be installed more flexibly.

[0127] According to some embodiments of the present application, the housing 21 includes a bottom plate 213 and a plurality of side plates 214. The side plates 214 extend along the periphery of the bottom plate 213 and together with the bottom plate 213 form a receiving space 212. An electrode component 25 is disposed on at least one side plate 214.

[0128] The bottom plate 213 is the side surface of the shell 21 with the second largest area. The bottom plate 213 can be arranged opposite to the opening 2121. The side plate 214 can be arranged at a certain angle to the bottom plate 213, for example, it can be arranged at 90 degrees. The number of side plates 214 can be set according to actual conditions. For example, in this embodiment, the number of side plates 214 is four. The accommodating space 212 is used to accommodate the bare battery cell 22. The electrode component 25 can be arranged on one side plate 214, or on multiple side plates 214.

[0129] Through the above method, the housing 21 can well accommodate the bare battery cell 22. At the same time, the electrode component 25 is arranged on the side plate 214, which is more conducive to the connection between the electrode component 25 and the tab 2211, and the structure of the battery cell 20 is simplified.

[0130] In a specific embodiment, the bending angle U of the tab 2211 is 90 degrees to 180 degrees.

[0131] For example, 90 degrees, 95 degrees, 100 degrees, 110 degrees, 120 degrees, 130 degrees, 140 degrees, 150 degrees, 160 degrees, 170 degrees, and 180 degrees.

[0132] Through the above method, the tab 2211 occupies less space and has a more compact structure, which is conducive to reducing the gap between the bare cell 22 and the side plate 214 provided with the electrode component 25, so that the bare cell 22 is not easy to shake. At the same time, the bare cell 22 can have a larger volume, which is conducive to increasing the amount of energy that can be stored in the unit volume of the battery cell 20.

[0133] According to some embodiments of the present application, the distance L1 between the bare battery cell 22 and the side plate 214 of the housing 21 without the electrode component 25 is 0.5 mm-2 mm, for example, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 2 mm.

[0134] Through the above method, a small gap can be formed between the bare cell 22 and the side plate 214 without the electrode component 25, and the bare cell 22 is further confined in the accommodating space 212, making it more difficult for the bare cell 22 to shake, thereby improving the stability of the battery cell 20. At the same time, the bare cell 22 occupies a larger volume in the battery cell 20, which is conducive to increasing the amount of energy that can be stored in the battery cell 20 per unit volume.

[0135] See also Figure 10 to Figure 11 , Fig.10 is a third structural schematic diagram of a battery cell according to one or more embodiments; Fig.11 yes Fig.10 A magnified schematic diagram of D. Figures 1 to 9 According to some embodiments of the present application, a support plate 23 is provided between the bare battery cell 22 and the side plate 214 of the shell 21 where no electrode component 25 is provided.

[0136] The number and placement of the support plates 23 can be set according to actual conditions. For example, in one embodiment, one support plate 23 is placed between the bare cell 22 and the side plate 214 in the shell 21 that is opposite to the side plate 214 on which the electrode component 25 is provided. For example, in another embodiment, one support plate 23 is placed between the bare cell 22 and the side plate 214 in the shell 21 that is adjacent to the side plate 214 on which the electrode component 25 is provided. For example, in another other embodiment, one support plate 23 is placed between the bare cell 22 and the side plate 214 in the shell 21 that is opposite to the side plate 214 on which the electrode component 25 is provided, and another support plate 23 is placed between the bare cell 22 and the side plate 214 in the shell 21 that is adjacent to the side plate 214 on which the electrode component 25 is provided.

[0137] The material of the support plate 23 may include resin and metal. The use of resin material for the support plate 23 is conducive to improving the buffering performance of the support plate 23, so that the bare battery cell 22 is not easily damaged due to collision with the support plate 23. The use of metal material for the support plate 23 can enhance the limiting ability of the support plate 23 and better limit the movement of the bare battery cell 22.

[0138] Through the above method, the support plate 23 can fill the gap between the bare battery cell 22 and the side plate 214 of the shell 21, thereby reducing the shaking of the bare battery cell 22 in the shell 21 and making the installation of the bare battery cell 22 more stable.

[0139] According to some embodiments of the present application, the support plate 23 includes a bottom support plate 231. The bottom support plate 231 is disposed between the bare battery cell 22 and a side plate 214 disposed opposite to the side plate 214 on which the electrode component 25 is disposed in the housing 21.

[0140] The thickness of the bottom support plate 231 may be less than or equal to the gap between the bare battery cell 22 and the side plate 214 on which the electrode component 25 is disposed.

[0141] Through the above method, the bottom support plate 231 can fill the gap between the bare battery cell 22 and the side plate 214 in the shell 21 which is arranged opposite to the side plate 214 on which the electrode component 25 is arranged, which is helpful to reduce the shaking of the bare battery cell 22 in the shell 21 and make the installation of the bare battery cell 22 more stable.

[0142] According to some embodiments of the present application, the support plate 23 includes a side support plate 232 , and the side support plate 232 is disposed between the bare battery cell 22 and a side plate 214 in the shell 21 adjacent to the side plate 214 on which the electrode component 25 is disposed.

[0143] The thickness of the side support plate 232 may be less than or equal to the gap between the bare cell 22 and the side plate 214 adjacent to the side plate 214 on which the electrode component 25 is disposed in the shell 21 .

[0144] Through the above method, the side support plate 232 can fill the gap between the bare battery cell 22 and the side plate 214 in the shell 21 adjacent to the side plate 214 on which the electrode component 25 is provided, which is helpful to reduce the shaking of the bare battery cell 22 in the shell 21 and make the installation of the bare battery cell 22 more stable.

[0145] Please continue reading Figures 1 to 11 According to some embodiments of the present application, the thickness L2 of the support plate 23 is less than or equal to the distance L1 between the bare battery cell 22 and the side plate 214 of the housing 21 where the electrode component 25 is not provided. The thickness L2 of the support plate 23 can be 0.1 mm-1.5 mm. For example, 0.1 mm, 0.2 mm, 0.3 mm, 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm.

[0146] Through the above method, the support plate 23 can better fill the gap between the bare cell 22 and the side plate 214 of the housing 21 without the electrode component 25. At the same time, the smaller thickness of the support plate 23 is conducive to the installation of the support plate 23 between the bare cell 22 and the side plate 214 of the housing 21 without the electrode component 25, thereby improving the organizational efficiency of the battery cell 20.

[0147] See also Figures 12 to 15 , Fig.12 is a fourth structural schematic diagram of a battery cell according to one or more embodiments; Fig.13 yes Fig.12 Middle E is an enlarged schematic diagram; Fig.14 is a fifth structural schematic diagram of a battery cell according to one or more embodiments; Fig.15 2 is a cross-sectional view of a battery cell according to one or more embodiments. According to some embodiments of the present application, the housing 21 includes a bottom plate 213 and a plurality of side plates 214, the side plates 214 extend along the periphery of the bottom plate 213, and together with the bottom plate 213 form an accommodation space 212, a flange edge 2141 is connected to a side of the side plate 214 away from the bottom plate 213, the flange edge 2141 extends from an end of the side plate 214 away from the bottom plate 213 to the outside of the accommodation space 212, and the top cover 24 is connected to the flange edge 2141.

[0148] Specifically, the housing 21 may include a bottom plate 213 and four side plates 214. A flange 2141 is connected to one side of the side plate 214 away from the bottom plate 213. The flange 2141 and the side plate 214 may be independent components. Alternatively, the flange 2141 and the side plate 214 may be integrally formed. The flange 2141 is extended from one end of the side plate 214 away from the bottom plate 213, and the flange 2141 is extended outwardly toward the accommodating space 212, so that the flange 2141 is located at the periphery of the side plate 214.

[0149] The shape of the flange 2141 may match the shape of the top cover 24. For example, when the top cover 24 is in the shape of a flat plate, the flange 2141 may be configured to be in the shape of a flat plate parallel to the top cover 24. The top cover 24 may be connected to an end of the flange 2141 away from the housing 21.

[0150] Through the above method, the top cover 24 is connected to the flange edge 2141 of the shell 21. By setting the connection position at the flange edge 2141, the distance between the connection position of the top cover 24 and the flange edge 2141 and the bare battery cell 22 can be increased, thereby avoiding damage to the bare battery cell 22 due to light leakage during the connection between the top cover 24 and the flange edge 2141. In addition, it can also reduce the damage to the bare battery cell 22 caused by particulate matter falling into the bare battery cell 22, thereby protecting the bare battery cell 22 and improving the reliability and safety of the battery cell 20.

[0151] According to some embodiments of the present application, the side panel 214 is connected to the bottom panel 213 via a first transition angle α, and the side panel 214 is connected to the flange edge 2141 via a second transition angle β.

[0152] Specifically, the side panel 214 and the bottom panel 213 are connected through a first transition angle α, so that the side panel 214 and the bottom panel 213 are arranged at a certain angle, thereby improving the stability and reliability of the shell 21. The size and shape of the accommodating space 212 will be different depending on the angle of the first transition angle α. The angle of the first transition angle α can be greater than 0 degrees and less than 180 degrees, such as the angle of the first transition angle α can be 30 degrees, 60 degrees, 90 degrees, 120 degrees, 138 degrees, etc. When the angle of the first transition angle α is 90 degrees, the side panel 214 is arranged vertically to the bottom panel 213. Among them, the size and shape of the accommodating space 212 and the angle of the first transition angle α are determined according to actual needs and are not limited here.

[0153] The side plate 214 and the flange edge 2141 are connected through the second transition angle β, so that the side plate 214 and the flange edge 2141 are arranged at a certain angle, thereby improving the stability and reliability of the flange edge 2141, thereby improving the stability and reliability of the housing 21. The angle of the second transition angle β can also be greater than 0 degrees and less than 180 degrees, such as the angle of the second transition angle β can be 30 degrees, 60 degrees, 90 degrees, 120 degrees, 138 degrees, etc. When the angle of the second transition angle β is 90 degrees, the side plate 214 and the flange edge 2141 are arranged vertically. When the flange edge 2141 is arranged parallel to the bottom plate 213, the angle of the second transition angle β is the same as the angle of the first transition angle α.

[0154] Through the above method, the first turning angle α and the second turning angle β can improve the stability of the shell 21, thereby improving the stability of the top cover 24 connected to the flange edge 2141, thereby being able to electrically protect the bare battery cell 22.

[0155] According to some embodiments of the present application, the radius R of the second transition angle β is less than or equal to 0.2 mm. The radius R of the second transition angle β may be, but is not limited to, 0.091 mm, 0.1 mm, 0.15 mm, 0.17 mm, and 0.2 mm. In the above manner, the connection stability between the side plate 214 and the flange edge 2141 may be increased.

[0156] According to some embodiments of the present application, the side panel 214 is disposed around the bottom panel 213 , the flange edge 2141 is disposed around the side panel 214 , and the flange edge 2141 is connected to the top cover 24 .

[0157] Specifically, the side plate 214 surrounds the bottom plate 213 to form an accommodating space 212. When the housing 21 is a rectangular parallelepiped, the number of the side plates 214 is four. When the housing 21 is a cylindrical shape, the side plate 214 can be one and arranged in a ring shape. When the housing 21 is a hexagonal prism, the number of the side plates 214 is six. The number of the side plates 214 can be determined according to the shape of the housing 21, and is not limited here.

[0158] Each side panel 214 is provided with a corresponding flange 2141. The flange 2141 varies with the number and shape of the side panels 214. When the shell 21 is a rectangular parallelepiped, the number of side panels 214 is four, and the number of flanges 2141 can be four. When the shell 21 is a cylindrical shape, the side panel 214 can be one and arranged in a ring shape, and the number of flanges 2141 can also be one and arranged in a ring shape. In some other embodiments, the shell 21 is not limited to the above-mentioned rectangular parallelepiped, cylindrical shape, etc., that is, the flange 2141 is not limited to the above-mentioned number and shape, etc. Of course, the number of flanges 2141 can also be different from the number of side panels 214, which is not limited here. The flange 2141 is parallel to the top cover 24, so that the top cover 24 and the flange 2141 are more closely connected.

[0159] Through the above method, each side plate 214 is provided with a corresponding flange edge 2141 , and the top cover 24 is connected to all the flange edges 2141 , so that the connection positions are all located on the flange edges 2141 , thereby improving the protection performance of the bare battery cell 22 .

[0160] According to some embodiments of the present application, the edge of the top cover 24 is aligned with the edge of the flange edge 2141 away from the side plate 214 .

[0161] Specifically, after the top cover 24 is connected to the flange 2141 , the edge of the top cover 24 and the edge of the flange 2141 away from the side panel 214 need to be cut to prevent the edge of the top cover 24 and / or the flange 2141 from protruding away from the edge of the side panel 214 .

[0162] By adopting the above-mentioned method, the top cover 24 and / or the flange edge 2141 can be prevented from piercing the adjacent battery cells 20 or the box body 10 in the battery 100, etc.; and the structure of the battery cell 20 itself can be made more compact, which is convenient for subsequent series or parallel connection of multiple battery cells 20, etc.

[0163] According to some embodiments of the present application, the housing 21 is an integrally formed structure.

[0164] Specifically, the bottom plate 213 and the side plate 214 are integrally formed. When the number of the side plates 214 may be but is not limited to four, the four side plates 214 are integrally formed with the bottom plate 213 and surround the accommodating space 212. In this way, the housing 21 is more stable, thereby improving the stability of the flange 2141 on which the top cover 24 is connected to the housing 21.

[0165] Through the above-mentioned manner, the shell 21 is more stable, thereby improving the stability of the flange edge 2141 on the shell 21 where the top cover 24 is connected.

[0166] According to some embodiments of the present application, the maximum distance between the edge of the flange 2141 away from the side plate 214 and the outer surface of the side plate 214 is no more than 5 mm.

[0167] Specifically, in order to facilitate the connection of the top cover 24 to the flange 2141, the distance that the flange 2141 extends along one end of the side panel 214 away from the bottom panel 213 and outwardly toward the accommodating space 212 is increased, and the size of the top cover 24 can also be increased to match the flange 2141. At the same time, the maximum distance that the flange 2141 extends outwardly is limited, reducing material costs, etc. Among them, the distance that the flange 2141 extends along one end of the side panel 214 away from the bottom panel 213 and outwardly toward the accommodating space 212 can be greater than 0 mm. The distance that the flange 2141 extends along one end of the side panel 214 away from the bottom panel 213 and outwardly toward the accommodating space 212 can be less than or equal to 10 mm. The distance that the flange 2141 extends along one end of the side panel 214 away from the bottom panel 213 and outwardly toward the accommodating space 212 is defined as L3, as Fig.13 L3 can be, but is not limited to, 10 mm, 9 mm, 7 mm, 5.5 mm, 5 mm, 4 mm, 3.4 mm, 2 mm, 1 mm, etc.

[0168] After the top cover 24 is connected to the flange 2141, it is necessary to cut the edge of the top cover 24 and the edge of the flange 2141 away from the side panel 214, wherein the actual connection position W between the top cover 24 and the flange 2141 is avoided during the cutting process. Among them, the distance between the edge of the flange 2141 away from the side panel 214 and the outer surface of the side panel 214 is not greater than a predetermined threshold value (not shown in the figure). That is, the cutting position is greater than or equal to the predetermined threshold position. The predetermined threshold value can increase the distance between the connection position W and the bare cell 22, reducing the damage to the bare cell 22 caused by laser leakage; in addition, it can also reduce the damage to the bare cell 22 caused by particulate matter falling into the bare cell 22, thereby protecting the bare cell 22.

[0169] The predetermined threshold may be 5 mm. The distance between the edge of the flange 2141 away from the side plate 214 and the outer surface of the side plate 214 may be, but is not limited to, 1 mm, 2.1 mm, 3 mm, 3.7 mm, 4 mm, 5 mm, etc.

[0170] Through the above method, the distance between the actual connection position between the flange edge 2141 and the top cover 24 and the bare battery cell 22 is limited, thereby reducing the damage to the bare battery cell 22 caused by laser leakage and falling of particulate matter.

[0171] According to some embodiments of the present application, one of the side of the flange edge 2141 facing the top cover 24 and the side of the top cover 24 facing the flange edge 2141 is provided with an alignment groove, and the other is provided with an alignment portion, which is inserted into the alignment groove.

[0172] Specifically, a side of the flange 2141 facing the top cover 24 is provided with an alignment groove. A side of the top cover 24 facing the flange 2141 is provided with an alignment portion. When the top cover 24 is connected to the flange 2141, the alignment portion is inserted into the alignment groove. At this time, the top cover 24 and the flange 2141 are tightly fitted.

[0173] Alternatively, a positioning portion is provided on one side of the flange edge 2141 facing the top cover 24. A positioning groove is provided on one side of the top cover 24 facing the flange edge 2141. When the top cover 24 is connected to the flange edge 2141, the positioning portion is inserted into the positioning groove. At this time, the top cover 24 and the flange edge 2141 fit tightly.

[0174] Through the above-mentioned method, the alignment portion and the alignment groove are plugged and aligned, and the top cover 24 can be quickly positioned on the flange edge 2141, thereby improving the efficiency of installing the top cover 24 to the shell 21, thereby improving the installation efficiency of the battery cell 20.

[0175] According to some embodiments of the present application, the edge of the flange 2141 away from the side plate 214 is connected to the edge of the top cover 24 by welding.

[0176] Specifically, a welding position is formed between the edge of the flange 2141 away from the side plate 214 and the edge of the top cover 24, wherein the welding position is the connection position W mentioned above. The welding position is spaced apart from the bare cell 22 to prevent the bare cell 22 from being damaged by welding laser and particulate matter. In the above manner, the flange 2141 and the top cover 24 are welded and fixed, which is simple and easy to implement.

[0177] By means of the above method, the flange edge 2141 and the top cover 24 are welded and fixed, which is simple and easy to implement.

[0178] According to some embodiments of the present application, the present application further provides a battery 100, including the battery cell 20 described in any of the above schemes. The battery 100 may be an energy storage device, etc. The energy storage device is a type of battery 100, which can be used as a power grid, or in scenarios such as home life or business, for storing and / or releasing electrical energy. The energy storage device may be an energy storage cabinet, an energy storage container, etc.

[0179] According to some embodiments of the present application, the present application further provides an electrical device, comprising the battery 100 described in any of the above schemes, and the battery 100 is used to provide electrical energy to the electrical device.

[0180] The power-consuming device may be a mobile phone, a computer, a car, or any of the aforementioned devices or systems using the battery 100 .

[0181] See also Figures 16 to 18 , Fig.16 is a flowchart according to one or more embodiments; Fig.17 is another flowchart according to one or more embodiments; Fig.18 is another flow chart according to one or more embodiments. According to some embodiments of the present application, the present application provides a method for manufacturing a battery cell 20. The method for manufacturing a battery cell 20 includes:

[0182] S110 : connecting the electrode lead-out piece 221 of the bare cell 22 to the electrode component 25 .

[0183] S120: bending the connected electrode lead-out piece 221 so that the bare cell 22 enters the accommodating space 212 of the shell 21 through the opening 2121 of the shell 21 . The opening 2121 of the shell 21 is the side surface of the shell 21 with the largest area.

[0184] S130 : Connect the top cover 24 to the housing 21 to close the opening 2121 .

[0185] Specifically, the electrode component 25 is disposed in the shell 21 and may be at least partially located in the accommodating space 212 of the shell 21. The electrode component 25 may be used to electrically connect to the bare battery cell 22 for outputting or inputting electrical energy of the battery cell 20. In some embodiments, the electrode component 25 may include a positive electrode component 25 and a negative electrode component 25 for outputting current and connecting to an external circuit. The method of connecting the electrode lead 221 to the electrode component 25 may include laser welding, friction welding, ultrasonic welding, etc. The electrode component 25 may include a pole, etc. The electrode lead 221 may include a pole ear 2211, a transition piece, etc.

[0186] The electrode lead-out piece 221 of the bare cell 22 can be located on one side of the shell 21 and outside the accommodating space 212 before connection. After the electrode lead-out piece 221 is connected to the electrode component 25, the electrode lead-out piece 221 can be bent around the position between the bare cell 22 and the electrode component 25. The bending direction of the tab 2211 and / or the electrode component 25 is along the direction close to the accommodating space 212. The end of the tab 2211 connected to the bare cell 22 drives the bare cell 22 to move around the bending position. After the tab 2211 and / or the electrode component 25 are bent, the bare cell 22 enters the accommodating space 212 of the shell 21 completely.

[0187] The opening 2121 may be located on the side of the housing 21 with the largest area. The top cover 24 may close the opening 2121 by covering. The connection method between the top cover 24 and the housing 21 may include laser welding, tungsten inert gas welding, etc. When the top cover 24 closes the opening 2121, the accommodating space 212 is isolated from the external environment.

[0188] Through the above method, the bare cell 22 can form a stable electrical connection with the electrode component 25, and can be directly installed in the accommodating space 212 of the housing 21 by bending the electrode lead-out piece 221. The bare cell 22 can be easily installed with the electrode component 25 disposed in the housing 21, and the battery cell 20 can be efficiently assembled.

[0189] According to some embodiments of the present application, the shell 21 includes a bottom plate 213 and a plurality of side plates 214 , the side plates 214 extend along the periphery of the bottom plate 213 , and together with the bottom plate 213 form a accommodating space 212 , the opening 2121 is arranged opposite to the bottom plate 213 , and the electrode component 25 is the bottom plate 213 or the side plate 214 of the shell 21 .

[0190] Specifically, when the electrode component 25 is the bottom plate 213 or the side plate 214 of the housing 21, the pole ear 2211 is connected to the bottom plate 213 or the side plate 214. The side plate 214 can be set at a certain angle to the bottom plate 213, for example, it can be set at 90 degrees. The number of side plates 214 can be set according to actual conditions. For example, in this embodiment, the number of side plates 214 is four. The accommodation space 212 is used to accommodate the bare battery cell 22.

[0191] Through the above method, the tab 2211 is directly connected to the bottom plate 213 or the side plate 214, and the connection structure is simple and easy to produce. At the same time, it is also helpful to reduce the structure between the bare cell 22 and the shell 21, and the volume proportion of the bare cell 22 in the accommodating space 212 is increased, thereby enhancing the energy density of the battery cell 20.

[0192] According to some embodiments of the present application, the housing 21 includes a bottom plate 213 and a plurality of side plates 214. The side plates 214 extend along the periphery of the bottom plate 213 and together with the bottom plate 213 form a receiving space 212. The opening 2121 is disposed opposite to the bottom plate 213, and the electrode component 25 is disposed on at least one side plate 214.

[0193] Specifically, the bottom plate 213 is the side surface of the housing 21 with the largest area. The side plate 214 can be set at a certain angle to the bottom plate 213, for example, it can be set at 90 degrees. The number of side plates 214 can be set according to actual conditions. For example, in this embodiment, the number of side plates 214 is four. The accommodation space 212 is used to accommodate the bare battery cell 22.

[0194] Through the above method, the electrode component 25 is arranged on the side plate 214, which is more conducive to the connection between the electrode component 25 and the tab 2211, and the structure of the battery cell 20 is simplified.

[0195] According to some embodiments of the present application, the electrode lead-out member 221 includes a tab 2211, and the step of connecting the electrode lead-out member 221 of the bare cell 22 to the electrode component 25 includes:

[0196] S210 : welding the tab 2211 of the bare cell 22 to the electrode component 25 .

[0197] Through the above method, the bare cell 22 can conveniently connect the tab 2211 with the electrode component 25 to form a current loop.

[0198] According to some embodiments of the present application, the electrode lead-out member 221 includes a tab 2211 and a connecting sheet 2212, and the step of connecting the electrode lead-out member 221 of the bare cell 22 to the electrode component 25 includes:

[0199] S311: welding the tab 2211 of the bare battery cell 22 to the connecting piece 2212;

[0200] S312 : Welding the connection piece 2212 to the electrode component 25 .

[0201] Specifically, the connecting piece 2212 is made of a conductive material. One end of the connecting piece 2212 can be welded to the pole ear 2211 first, and then the other end is welded to the electrode component 25. The connecting piece 2212 can also be welded to the electrode component 25 at one end, and then the other end is welded to the pole ear 2211. In other words, the order of S311 and S312 can be exchanged. The shape of the connecting piece 2212 can be set according to actual conditions, for example, the connecting piece 2212 can be in the form of a thin sheet to facilitate bending.

[0202] By the above method, the tab 2211 does not need to be directly connected to the electrode component 25, and the tab 2211 can be more flexibly connected to the electrode component 25, and the battery cell 20 can be flexibly installed. At the same time, the connecting piece 2212 can share the tension between the tab 2211 and the electrode component 25, and the tab 2211 is not easy to break.

[0203] See also Fig.19 , Fig.19 is another flowchart according to one or more embodiments. Figures 1 to 18 According to some embodiments of the present application, the electrode lead-out member 221 includes a tab 2211, a first connecting piece 2212c and a second connecting piece 2212d, and the step of connecting the electrode lead-out member 221 of the bare cell 22 to the electrode component 25 includes:

[0204] S411: welding the tab 2211 of the bare battery cell 22 to the first connecting piece 2212c;

[0205] S412: Welding the first connecting piece 2212c and the second connecting piece 2212d;

[0206] S413 : Welding the second connecting piece 2212 d to the electrode component 25 .

[0207] Specifically, the first connecting piece 2212c is made of a conductive material. The second connecting piece 2212d is made of a conductive material. The connection sequence between the pole tab 2211, the first connecting piece 2212c, the second connecting piece 2212d, and the electrode component 25 can be adjusted according to actual conditions. For example, in a specific embodiment, the pole tab 2211 is first welded to one end of the first connecting piece 2212c. After the pole tab 2211 is welded to one end of the first connecting piece 2212c, the other end of the first connecting piece 2212c is welded to one end of the second connecting piece 2212d. After one end of the second connecting piece 2212d is welded to the other end of the first connecting piece 2212c, the second connecting piece 2212d is welded to the electrode component 25. That is to say, the execution order of S411, S412 and S413 can be swapped, and can be executed in the order of S411, S412, S413, or in the order of S412, S411, S413, or in the order of S413, S411, S412. Other execution orders are, for example, S411, S413, S412; S412, S413, S411; S413, S412, S411. Alternatively, S411 and S413 can be executed simultaneously, and then S412 is executed.

[0208] As in another specific embodiment, the electrode component 25 is first welded to one end of the second connecting piece 2212d. After the welding of one end of the second connecting piece 2212d to the electrode component 25 is completed, the other end of the second connecting piece 2212d is welded to one end of the first connecting piece 2212c. After the welding of the other end of the second connecting piece 2212d to one end of the first connecting piece 2212c is completed, the other end of the first connecting piece 2212c is welded to the pole ear 2211.

[0209] As in another embodiment, one end of the first connecting piece 2212c is first welded to one end of the second connecting piece 2212d. After the welding of one end of the first connecting piece 2212c to one end of the second connecting piece 2212d is completed, the other end of the first connecting piece 2212c is welded to the pole ear 2211. After the other end of the first connecting piece 2212c is welded to the pole ear 2211, the other end of the second connecting piece 2212d is welded to the electrode component 25.

[0210] The shapes of the first connecting piece 2212c and the second connecting piece 2212d can be set according to actual conditions. For example, the first connecting piece 2212c can be in the shape of a thin sheet so as to be more convenient to bend. The second connecting piece 2212d can be in the shape of a thin sheet so as to be more convenient to bend.

[0211] Through the above method, the pole tab 2211 and the electrode component 25 are connected by the first connecting piece 2212c and the second connecting piece 2212d, and the first connecting piece 2212c and the second connecting piece 2212d can better share the pulling force between the pole tab 2211 and the electrode component 25, and the pole tab 2211 is not easy to break. At the same time, the connection between the pole tab 2211 and the electrode component 25 can be divided into multiple steps, and the battery cell 20 is more flexible to install.

[0212] According to some embodiments of the present application, the housing 21 includes a bottom plate 213, and the opening 2121 is arranged opposite to the bottom plate 213. Before the step of connecting the electrode lead-out piece 221 of the bare battery cell 22 to the electrode component 25, the following steps are further included:

[0213] S402 : A preset angle P is formed between the bare battery cell 22 and the bottom plate 213 .

[0214] Specifically, the preset angle P refers to the angle between the side surface of the bare cell 22 with the largest area and the bottom plate 213 .

[0215] Through the above method, the preset angle P enables the bare cell 22 and the electrode component 25 to have a better welding posture, so that the welding quality of the bare cell 22 and the electrode component 25 is better. At the same time, the preset angle P allows the bare cell 22 to be in a more convenient bending position, thereby improving the efficiency of installing the bare cell 22 into the accommodating space 212.

[0216] According to some embodiments of the present application, before the step of connecting the pole ear 2211 of the bare battery cell 22 with the electrode component 25, the pole ear 2211 of the bare battery cell 22 can also be aligned with the electrode component 25 so that the pole ear 2211 of the bare battery cell 22 is in a position where it can be connected to the electrode component 25.

[0217] Through the above method, the connection between the tab 2211 and the electrode component 25 is more convenient, which is beneficial to improving the connection quality.

[0218] According to some embodiments of the present application, the preset angle P is not less than 45 degrees and not greater than 135 degrees, for example 45 degrees, 50 degrees, 55 degrees, 60 degrees, 70 degrees, 75 degrees, 85 degrees, 90 degrees, 100 degrees, 120 degrees, 130 degrees, 135 degrees.

[0219] Through the above method, the bare battery cell 22 and the electrode component 25 can have a better welding posture when being welded, the welding heat input is more uniform, the parent material is more fully fused, the probability of cold welding is reduced, and the weld quality is better.

[0220] According to some embodiments of the present application, in the step of connecting the electrode lead-out piece 221 of the bare battery cell 22 with the electrode component 25 , the bare battery cell 22 is perpendicular to the bottom plate 213 .

[0221] The bare cell 22 being perpendicular to the bottom plate 213 means that the angle between the side surface of the bare cell 22 with the largest area and the bottom plate 213 is 90 degrees.

[0222] Through the above method, the contact area between the bare battery cell 22 and the electrode component 25 is larger, the welding posture is good, the welding heat input is more uniform, the base material is more fully fused, and the weld quality is better.

[0223] According to some embodiments of the present application, before the step of welding the top cover 24 to the housing 21 to close the opening 2121, the following steps are further included:

[0224] S330 : placing a support plate 23 between at least one side of the bare cell 22 where the electrode lead-out piece 221 is not provided and the housing 21 .

[0225] The number and placement of the support plates 23 can be set according to actual conditions. For example, in one embodiment, a support plate 23 is placed between the shell 21 and the side of the bare cell 22 opposite to the side where the pole lug 2211 is provided. For example, in another embodiment, a support plate 23 is placed between the shell 21 and the side of the bare cell 22 adjacent to the side where the pole lug 2211 is provided. For example, in another other embodiment, a support plate 23 is placed between the shell 21 and the side of the bare cell 22 opposite to the side where the pole lug 2211 is provided, and another support plate 23 is placed between the shell 21 and the side of the bare cell 22 adjacent to the side where the pole lug 2211 is provided.

[0226] The material of the support plate 23 may include plastic, resin, and metal. The plastic may be polypropylene, polyethylene, etc. The use of resin plastic material for the support plate 23 is conducive to improving the buffering performance of the support plate 23, so that the bare battery cell 22 is not easily damaged due to collision with the support plate 23. The use of metal material for the support plate 23 can enhance the limiting ability of the support plate 23 and better limit the movement of the bare battery cell 22.

[0227] Through the above method, the support plate 23 can fill the gap between the bare battery cell 22 and the side plate 214 of the shell 21, thereby reducing the shaking of the bare battery cell 22 in the shell 21 and making the installation of the bare battery cell 22 more stable.

[0228] According to some embodiments of the present application, a flange 2141 is provided on one side of the housing 21 facing the top cover 24, and the flange 2141 extends in a direction away from the accommodating space 212. The step of connecting the top cover 24 to the housing 21 to close the opening 2121 includes:

[0229] S340 : Cover the opening 2121 with the top cover 24 , and weld the top cover 24 to the flange 2141 .

[0230] Specifically, the housing 21 may include a bottom plate 213 and four side plates 214. A flange 2141 is connected to one side of the side plate 214 away from the bottom plate 213. The flange 2141 and the side plate 214 may be independent components. Alternatively, the flange 2141 and the side plate 214 may be integrally formed. The flange 2141 is extended from one end of the side plate 214 away from the bottom plate 213, and the flange 2141 is extended outwardly toward the accommodating space 212, so that the flange 2141 is located at the periphery of the side plate 214.

[0231] The shape of the flange 2141 may match the shape of the top cover 24. For example, when the top cover 24 is in the shape of a flat plate, the flange 2141 may be configured to be in the shape of a flat plate parallel to the top cover 24. The top cover 24 may be connected to an end of the flange 2141 away from the housing 21.

[0232] Through the above method, the distance between the connection position of the top cover 24 and the flange edge 2141 and the battery cell is increased, which is beneficial to reduce the probability of battery cell damage caused by light leakage during the connection process of the top cover 24 and the flange edge 2141; in addition, it can also reduce the damage to the battery cell caused by particulate matter falling into the battery cell, thereby protecting the battery cell and improving the reliability and safety of the battery cell 20.

[0233] According to some embodiments of the present application, after the steps of covering the opening 2121 with the top cover 24 and welding the top cover 24 to the flange 2141, the following steps are further included:

[0234] S350 : cutting the welded flange 2141 and the top cover 24 , removing the edge of the flange 2141 away from the accommodating space 212 , and removing the edge of the top cover 24 .

[0235] Specifically, the edge of the flange 2141 away from the accommodating space 212 refers to the portion between the position where the flange 2141 is welded to the top cover 24 and the edge of one end of the flange 2141 away from the accommodating space 212. When removing the edge of the flange 2141 away from the accommodating space 212, the above portion may be removed in its entirety or in part.

[0236] The edge of the top cover 24 refers to the portion between the position where the top cover 24 is welded to the flange 2141 and the edge of one end of the top cover 24 away from the accommodating space 212. When removing the edge of the top cover 24, the above portion may be removed in its entirety or in part.

[0237] By means of the above method, the space occupied by the flange edge 2141 and the top cover 24 can be reduced, thereby reducing the space occupied by the battery cell 20 .

[0238] According to some embodiments of the present application, before the step of welding the tab 2211 of the bare battery cell 22 to the electrode component 25, the following steps are further included:

[0239] S401: Wrapping the outer surface of the bare battery cell 22 with an insulating film (not shown in the figure).

[0240] Specifically, the material of the insulating film has insulating properties. The insulating film is similar to plastic paper. The insulating film can be completely wrapped around the outer surface of the bare battery 22. The insulating film can also be partially wrapped around the outer surface of the bare battery 22. For example, the insulating film is wrapped around the side surface of the bare battery 22 other than the side surface where the pole ear 2211 is provided.

[0241] Through the above method, the outer surface of the bare battery cell 22 has better insulation performance, and the insulating film protects the outer surface of the bare battery cell 22, thereby reducing the probability of the bare battery cell 22 being bumped and scratched when it is installed in the shell 21.

[0242] Finally, according to some embodiments of the present application, the manufacturing method of the battery cell 20 includes: connecting the electrode lead-out piece 221 of the bare battery cell 22 to the electrode component 25. The electrode lead-out piece 221 after the connection is completed is bent so that the bare battery cell 22 enters the accommodating space 212 of the shell 21 through the opening 2121, and the opening 2121 of the shell 21 is the side of the shell 21 with the largest area. The top cover 24 is welded to the shell 21 to close the opening 2121. Through the above method, the bare battery cell 22 can form a stable electrical connection with the electrode component 25, and can be directly installed in the accommodating space 212 of the shell 21 by bending the electrode lead-out piece 221. The bare battery cell 22 can be simply installed with the electrode component 25 provided in the shell 21, and the battery cell 20 can be efficiently assembled.

[0243] Finally, it should be noted that 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 replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate 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 includes a bare cell, a top cover and a shell, the shell has an opening, the shell is connected to the top cover, the top cover covers the opening and forms an accommodation space with the shell, the bare cell is arranged in the accommodation space, the opening is located on the side of the shell with the largest area, an electrode lead-out piece is arranged on one side of the bare cell, the shell includes an electrode component or the shell is connected to an electrode component, the electrode lead-out piece is connected to the electrode component, and the electrode lead-out piece is a bent structure.

2. The battery cell according to claim 1, characterized in that: The electrode lead-out member includes a pole ear, which is arranged on one side of the bare battery cell, the pole ear connects the bare battery cell and the electrode component, and the pole ear is a bent structure.

3. The battery cell according to claim 1, characterized in that: The electrode lead-out member includes a pole ear and a connecting sheet, wherein the pole ear is arranged on one side of the bare battery cell, one end of the connecting sheet is connected to the pole ear, and the other end of the connecting sheet is connected to the electrode component, and the pole ear and / or the connecting sheet are bent structures.

4. The battery cell according to claim 3, characterized in that: The connecting piece includes a first connecting portion connected to the electrode tab and a second connecting portion connected to the electrode component. The first connecting portion is bent relative to the second connecting portion, and the electrode tab extends between the first connecting portion and the second connecting portion.

5. The battery cell according to claim 3, characterized in that: The connecting piece includes a first connecting piece and a second connecting piece, one end of the first connecting piece is connected to the electrode ear, and the other end is connected to the second connecting piece, one end of the second connecting piece is connected to the first connecting piece, and the other end is connected to the electrode component, and at least one of the electrode ear, the first connecting piece, and the second connecting piece is a bent structure.

6. The battery cell according to any one of claims 1 to 5, characterized in that: The shell includes a bottom plate and a plurality of side plates, wherein the side plates extend along the periphery of the bottom plate and together with the bottom plate form the accommodating space, and the electrode component is disposed on at least one of the side plates.

7. The battery cell according to claim 6, characterized in that: The distance between the bare battery cell and the side plate of the shell where the electrode component is not provided is 0.5 mm-2 mm.

8. The battery cell according to claim 6 or 7, characterized in that: A support plate is arranged between the bare battery core and the side plate of the shell where the electrode component is not arranged.

9. The battery cell according to claim 8, characterized in that: The support plate includes a bottom support plate, and the bottom support plate is arranged between the bare battery cell and the side plate in the shell that is arranged opposite to the side plate where the electrode component is arranged.

10. The battery cell according to claim 8 or 9, characterized in that: The support plate includes a side support plate, and the side support plate is arranged between the bare battery cell and the side plate in the shell adjacent to the side plate on which the electrode component is arranged.

11. The battery cell according to any one of claims 1 to 10, characterized in that: The shell includes a bottom plate and a plurality of side plates, wherein the side plates extend along the periphery of the bottom plate and together with the bottom plate form the accommodating space, a flange edge is connected to a side of the side plate away from the bottom plate, the flange edge extends from an end of the side plate away from the bottom plate to the outside of the accommodating space, and the top cover is connected to the flange edge.

12. The battery cell according to claim 11, characterized in that: The side plate is connected to the bottom plate via a first transition angle, and the side plate is connected to the flange edge via a second transition angle.

13. The battery cell according to claim 12, characterized in that: The radius of the second transition angle is less than or equal to 0.2 mm.

14. The battery cell according to any one of claims 11 to 13, characterized in that: The side plate is arranged around the bottom plate, the flange edge is arranged around the side plate, and the flange edge is connected to the top cover.

15. The battery cell according to any one of claims 11 to 14, characterized in that: The edge of the top cover is aligned with the edge of the flange away from the side plate.

16. The battery cell according to any one of claims 11 to 15, characterized in that: The shell is an integrally formed structure.

17. The battery cell according to any one of claims 11 to 16, characterized in that: The maximum distance between the edge of the flange away from the side plate and the outer surface of the side plate is no more than 5 mm.

18. A battery, characterized in that: The battery comprises the battery cell according to any one of claims 1 to 17.

19. An electrical device, characterized in that: The electrical device comprises the battery according to claim 18, and the battery is used to supply power to the electrical device.

20. A method for manufacturing a battery cell, characterized in that: The method comprises: Connecting the electrode lead-out piece of the bare cell to the electrode component; The electrode lead-out piece after connection is bent so that the bare cell enters the accommodation space of the shell through the opening of the shell, and the opening of the shell is the side surface of the shell with the largest area; A top cover is connected to the housing to close the opening.

21. The method for manufacturing a battery cell according to claim 20, characterized in that: The shell includes a bottom plate and a plurality of side plates, wherein the side plates extend along the periphery of the bottom plate and together with the bottom plate form the accommodating space, the opening is arranged opposite to the bottom plate, and the electrode component is the bottom plate or the side plate of the shell.

22. The method for manufacturing a battery cell according to claim 20, characterized in that: The shell includes a bottom plate and a plurality of side plates, wherein the side plates extend along the periphery of the bottom plate and together with the bottom plate form the accommodating space, the opening is arranged opposite to the bottom plate, and the electrode component is arranged on at least one of the side plates.

23. The method for manufacturing a battery cell according to any one of claims 20 to 22, characterized in that: The electrode lead-out member includes a tab, and the step of connecting the electrode lead-out member of the bare cell to the electrode component includes: The tab of the bare cell is welded to the electrode component.

24. The method for manufacturing a battery cell according to any one of claims 20 to 22, characterized in that: The electrode lead-out member includes a tab and a connecting piece, and the step of connecting the electrode lead-out member of the bare cell to the electrode component includes: Welding the tab of the bare cell to the connecting sheet; The connecting piece is welded to the electrode component.

25. The method for manufacturing a battery cell according to any one of claims 20 to 24, characterized in that: The electrode lead-out member includes a tab, a first connecting piece, and a second connecting piece. The step of connecting the electrode lead-out member of the bare cell to the electrode component includes: Welding the tab of the bare cell to the first connecting piece; Welding the first connecting piece to the second connecting piece; The second connecting piece is welded to the electrode component.

26. The method for manufacturing a battery cell according to any one of claims 20 to 25, characterized in that: The housing includes a bottom plate, the opening is arranged opposite to the bottom plate, and before the step of connecting the electrode lead-out piece of the bare cell to the electrode component, the step further includes: A preset angle is formed between the bare battery core and the bottom plate.

27. The method for manufacturing a battery cell according to claim 26, characterized in that: The preset angle is not less than 45 degrees and not more than 135 degrees.

28. The method for manufacturing a battery cell according to claim 26 or 27, characterized in that: In the step of connecting the electrode lead-out piece of the bare cell to the electrode component, the bare cell is perpendicular to the bottom plate.

29. The method for manufacturing a battery cell according to any one of claims 20 to 28, characterized in that: Before the step of connecting the top cover to the shell to close the opening, the method further includes placing a support plate between the shell and at least one side of the bare cell where the electrode lead-out piece is not provided.

30. The method for manufacturing a battery cell according to any one of claims 20 to 29, characterized in that: The shell is provided with a flange edge on one side facing the top cover, and the flange edge extends in a direction away from the accommodating space. The step of connecting the top cover to the shell to close the opening includes: The top cover is used to cover the opening, and the top cover is welded to the flange.

31. The method for manufacturing a battery cell according to claim 30, characterized in that: After the step of covering the opening with the top cover and welding the top cover to the flange, the step further includes: The flange edge and the top cover that have been welded are cut to remove the edge of the flange edge away from the accommodating space and the edge of the top cover.

32. The method for manufacturing a battery cell according to any one of claims 20 to 31, characterized in that: Before the step of connecting the electrode lead-out piece of the bare cell to the electrode component, the step further includes: An insulating film is wrapped around the outer surface of the bare battery core.

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