Battery cell, battery and electrical device

Abstract

Battery cell, including: a housing comprising a side wall and a first end wall connected to the side wall; an electrode post which is dielectrically mounted on the first end wall; an electrode arrangement located in the housing, wherein the electrode arrangement comprises a first tab and the first tab faces the first end wall and is electrically connected to the electrode post; and an insulating component comprising a first insulating section and a second insulating section, wherein the second insulating section is arranged on the circumference at an outer edge of the first insulating section and projects towards a side on which the electrode arrangement is located, wherein the first insulation section is located between the first end wall and the first tab, and at least part of the second insulation section is located between the first tab and the side wall.

Description

TECHNICAL AREA

[0001] This application relates to the field of battery technology, in particular a battery cell, a battery and an electrical device. BACKGROUND

[0002] Energy saving and emission reduction are crucial for the sustainable development of the automotive industry. Electric vehicles have become an important component of this sustainable development due to their energy efficiency and environmental friendliness. Battery technology is of paramount importance for the development of electric vehicles.

[0003] Battery safety is of paramount importance. In some cases, a positive and a negative electrode plate within the battery are electrically connected via corresponding electrode terminals to conduct electrical energy to an electrical device. Maintaining reliable insulation between conductive paths of differing polarities within a battery cell to prevent short circuits is a pressing engineering challenge. CONTENT OF THE REVELATION

[0004] This application aims to solve at least one of the technical problems in the prior art. To this end, one objective of this application is to provide a battery cell, a battery, and an electrical device to improve the reliability of the insulation between conductive paths within the battery.

[0005] According to a first aspect, an embodiment of this application provides a battery cell. The battery cell comprises a housing, an electrode post, an electrode assembly, and an insulating component. The housing comprises a side wall and a first end wall connected to the side wall. The electrode post is dielectrically mounted to the first end wall. The electrode assembly is located in the housing. The electrode assembly comprises a first tab. The first tab faces the first end wall. The insulating component comprises a first insulating section and a second insulating section. The second insulating section is arranged on the circumference at an outer edge of the first insulating section and projects toward the side on which the electrode assembly is located.The first insulation section is located between the first end wall and the first tab, and at least part of the second insulation section is located between the first tab and the side wall.

[0006] In the technical solution provided in this embodiment of this application, this application can achieve insulation between the electrode arrangement and the housing from different directions by arranging an insulating component comprising a first insulating section and a second insulating section in the housing, thereby reducing the probability of short circuits within the battery.

[0007] In some embodiments, the second insulation section includes a guide section. The guide section is located at an end of the second insulation section facing away from the first insulation section. Along a direction away from the first insulation section, an inner surface of the guide section is inclined closer to the side wall. The inner surface of the guide section is inclined to facilitate the insertion of the electrode assembly into the receiving space defined by the second insulation section and its connection to the electrode post during assembly.

[0008] In some embodiments, the guide section gradually tapers in thickness along the direction leading away from the first insulation section. This tapered guide section can improve the utilization of space within the housing and reduce battery capacity loss.

[0009] In some embodiments, the second insulating section includes a connecting section. The two ends of the connecting section are each connected to the first insulating section and the guide section, respectively. The thickness of the connecting section is greater than or equal to the maximum thickness of the guide section. This facilitates the manufacture and processing of the insulating component and reduces its complexity. Furthermore, the relatively small thickness of the guide section can reduce the space it occupies within the housing.

[0010] In some embodiments, the difference between the thickness of the connecting section and the thickness of the first insulating section is less than or equal to 0.2 mm. Limiting the thickness difference to less than or equal to 0.2 mm can facilitate the manufacture and shaping of the insulating component and reduce the adverse effects of an abrupt change in thickness on strength.

[0011] In some embodiments, the thickness of the connecting section is less than the thickness of the first insulating section. By limiting the thickness of the connecting section of the second insulating section so that it is less than the thickness of the first insulating section, the space occupied by the second insulating section in the housing can be minimized and the capacity loss of the battery reduced.

[0012] In some embodiments, the thickness of the connecting section corresponds to the thickness of the first insulating section. This equal thickness of the connecting section facilitates integral forming and reduces manufacturing time. The identical thickness of both sections also contributes to ensuring high structural strength at the joint between them.

[0013] In some embodiments, the electrode post comprises an electrode post body and a first mounting section and a second mounting section, each located at opposite ends of the electrode post body. The first mounting section is located on a side of the first end wall facing the electrode assembly. The second mounting section is located on a side of the first end wall facing away from the electrode assembly. The first end wall is provided with a mounting through-hole. The electrode post body is at least partially received in the mounting through-hole. The first mounting section and the second mounting section are configured to clamp a portion of the first end wall. The battery cell further comprises a current collection component.The current collection component is located at least partially between the first tab and the first mounting section and is electrically connected separately to both. Part of the first insulation section is located between the first mounting section and the first end wall. In these embodiments, a clamping force can be applied to the first insulation section, resulting in more reliable insulation and a more compact internal battery structure, which in turn reduces the space required in the battery casing and the loss of capacity density.

[0014] In some embodiments, the electrode assembly further comprises a main section. The first tab is connected to the main section. The main section includes an active material region and an insulating region. The insulating region is located between the active material region and the first tab. The insulating region can reduce the risk of short circuits caused by burrs and also prevent short circuits caused by an overlap between a positive and a negative electrode, reduce direct contact between a positive electrode material and an electrolyte solution in the battery, and improve battery performance.

[0015] In some embodiments, the connecting section does not extend beyond an end of the insulation region located near the first end wall in a direction from the first end wall to the electrode assembly. In these embodiments, the relatively thick connecting section can bypass the insulation region within the second insulation section, thereby mitigating the crushing effect of the second insulation section on the electrode assembly when the second insulation section is located between the electrode assembly and the side wall, and reducing the loss of capacitance density.

[0016] In some embodiments, along a thickness direction of the first end wall, a length h1 of the connecting section, a thickness t1 of the first fastening section, a thickness t2 of the current-collecting component, and a height t3 of the first tab satisfy: h1 ≤ t1 + t2 + t3. This design positions the connecting section offset from the main section of the electrode assembly, thereby mitigating the crushing effect of the second insulation section on the electrode assembly and reducing the loss of capacitance density.

[0017] In some embodiments, the guide section does not extend beyond an end of the insulation area located near the active material area along a direction from the first end wall to the electrode assembly. In these embodiments, the guide section is offset from the active material area, thereby mitigating the crushing effect of the second insulation section on the active material area of ​​the main section of the electrode assembly and reducing the loss of capacitance density.

[0018] In some embodiments, along a thickness direction of the first end wall, a length h1 of the connecting section, a length h2 of the guide section, a thickness t1 of the first fastening section, a thickness t2 of the current collection component, a height t3 of the first tab, and a height w of the insulation area satisfy: h1 + h2 ≤ t1 + t2 + t3 + w. In these embodiments, the connecting section and the guide section can be arranged offset from the active material area of ​​the main section, thereby mitigating the crushing effect of the second insulation section on the active material area and reducing the loss of capacitance density.

[0019] In some embodiments, a recess is formed on the side of the first insulation section facing the electrode assembly. The first mounting section of the electrode post is at least partially received in this recess. This recess for receiving the first mounting section allows for a more compact arrangement of components within the battery, utilizes the interior space of the housing efficiently, and increases the battery's capacity.

[0020] In some embodiments, along a thickness direction of the first end wall, the depth of the recess is less than or equal to the thickness of the first mounting section. The first mounting section protrudes from the recess, thus facilitating connection with the current collector component. The first mounting section can provide a supporting force for the current collector component and mitigate deformation of the current collector component during welding and use.

[0021] In some embodiments, the connecting section does not extend beyond an end of the insulation region located near the first end wall in a direction from the first end wall to the electrode assembly. In these embodiments, the relatively thick connecting section can bypass the insulation region within the second insulation section, thereby mitigating the crushing effect of the second insulation section on the electrode assembly when the second insulation section is located between the electrode assembly and the side wall, and reducing the loss of capacitance density.

[0022] In some embodiments, along a thickness direction of the first end wall, a depth h0 of the receptacle, a length h1 of the connecting section, a thickness t1 of the first mounting section, a thickness t2 of the current-collecting component, and a height t3 of the first tab satisfy: h1 ≤ t1 + t2 + t3 - h0. In these embodiments, the relatively thick connecting section in the second insulation section can bypass the insulation area, thereby mitigating the crushing effect of the second insulation section on the electrode assembly when the second insulation section is located between the electrode assembly and the side wall, and reducing the loss of capacitance density.

[0023] In some embodiments, the guide section does not extend beyond an end of the insulation area located near the electrode assembly along a direction from the first end wall to the electrode assembly. In these embodiments, the guide section is offset relative to the active material area, thereby mitigating the crushing effect of the second insulation section on the active material area of ​​the main section of the electrode assembly and reducing the loss of capacitance density.

[0024] In some embodiments, along a thickness direction of the first end wall, a depth h0 of the receptacle, a length h1 of the connecting section, a length h2 of the guide section, a thickness t1 of the first mounting section, a thickness t2 of the current-collecting component, a height t3 of the first tab, and a height w of the insulation area satisfy: h1 + h2 ≤ t1 + t2 + t3 + w - h0. In these embodiments, the positions of the connecting section and the guide section can be arranged to bypass the position of the active material area of ​​the electrode assembly, thereby minimizing the crushing effect of the insulating component on the active material area and the space occupied by the insulating component in the housing, and reducing the loss of capacitance density.

[0025] In some embodiments, the thickness t1 of the first mounting section along a first direction is 0.4 mm ≤ t1 ≤ 1.2 mm. An appropriate value for the height of the first mounting section helps to utilize the volume space in the housing efficiently, reduce unnecessary capacity losses, and increase the battery capacity.

[0026] In some embodiments, the thickness t2 of the current collection component along the first direction is 0.2 mm ≤ t2 ≤ 0.6 mm. By selecting a suitable height, a good compromise can be achieved between the flow capacity of the current collection component and the loss of capacity and mass of the battery, thereby improving the overall performance of the battery.

[0027] In some embodiments, the height t3 of the first tab along the first direction is 0.5 mm ≤ t3 ≤ 1.5 mm. The appropriately chosen height t3 of the first tab allows for a more efficient structural arrangement within the battery housing and improves the battery's capacity and performance.

[0028] In some embodiments, the length h1 of the connecting section of the insulating component along the first direction satisfies 0 < h1 ≤ 3.3 mm. The connecting section can reduce manufacturing costs. A suitable length of the connecting section can also reduce the adverse effects that the insulating component has on other components in the battery housing.

[0029] In some embodiments, the length h2 of the guide section of the insulating component along the first direction is 1 mm ≤ h2 ≤ 8.5 mm. The selected suitable length of the guide section can prevent the battery performance from being impaired by a large crushing force on the active material coating on the electrode plate.

[0030] In some embodiments, the second insulation section further comprises an extension section. The extension section is connected to an end of the guide section opposite the connecting section. The thickness of the extension section is less than or equal to a minimum thickness of the guide section. The extension section is located at least partially between the active material region and the side wall. The extension section with the smallest thickness is located at an end of the second insulation section opposite the first insulation section. At least a portion of the extension section is located between the active material region and the side wall, thereby forming more reliable physical insulation and reducing the risk of short circuits within the battery.The extension section can also limit the position of the electrode arrangement in the housing, thereby improving the stability and reliability of the battery's internal structure.

[0031] In some embodiments, the thickness b1 of the connecting section meets the following criteria: 0.2 mm ≤ b1 ≤ 1 mm, and the thickness b3 of the extension section meets the following criteria: 0.02 mm ≤ b3 ≤ 0.1 mm. In this way, the thickness of the connecting section and the thickness of the extension section can be appropriately selected according to the dimensional requirements of the individual components in the battery, thereby achieving reliable insulation and minimizing capacity loss.

[0032] In some embodiments, the length h3 of the extension section along the first direction satisfies 0 < h3 ≤ 7 mm. An extension section of a suitably chosen length can ensure reliable insulation between the electrode assembly and the housing.

[0033] In some embodiments, the housing is cylindrical; the outer edge of the first insulating section is circular, and the outer diameter of the second insulating section is less than or equal to the inner diameter of the housing's side wall. The outer diameter of the second insulating section is less than or equal to the inner diameter of the side wall, allowing the insulating component to fit comfortably within the housing and facilitating assembly.

[0034] In some embodiments, the outer diameter of the second insulation section gradually increases in a direction away from the first insulation section. The widened opening can provide a tighter fit between the second insulation section and the inner surface of the housing's side wall, reducing the capacity loss caused by a gap between the second insulation section and the side wall, and facilitating assembly in the battery.

[0035] In some embodiments, the second insulating section comprises a connecting section and a guide section arranged sequentially in one direction away from the first insulating section. An outer diameter D1 of the connecting section at a junction between the connecting section and the guide section, an outer diameter D2 of the guide section at an end opposite the connecting section, and an inner diameter D of the housing satisfy the following conditions: D1 ≤ D2 ≤ D. By establishing a suitable numerical relationship between the outer diameter of the connecting section and the outer diameter of the guide section, the insulating component can be smoothly inserted into the housing.At the same time, the widened opening of the second insulation section is better suited for a tight fit on the inside of the housing, thus avoiding interference with the electrode arrangement and resulting damage to the electrode arrangement.

[0036] In some embodiments, the second insulation section further comprises an extension section. The extension section is located at an end of the guide section opposite the connecting section. An outer diameter D3 of the extension section at an end opposite the guide section satisfies: D1 ≤ D2 ≤ D3 ≤ D. The outer diameters of the connecting section, the guide section, and the extension section of the second insulation section at the end opposite the first insulation section increase incrementally, making it easier to insert the insulation component into the housing and avoiding interference with the electrode arrangement.

[0037] In some embodiments, the inner diameter D of the housing side wall satisfies the following: 44.8 mm ≤ D ≤ 45.5 mm. The outer diameter D1 of the connecting section at the junction between the connecting section and the guide section satisfies the following: 43.5 mm ≤ D1 ≤ 45.5 mm. The outer diameter D2 of the guide section at an end opposite the connecting section satisfies the following: 44.5 mm ≤ D2 ≤ 45.5 mm. The outer diameter D3 of the extension section at an end opposite the guide section satisfies the following: 44.7 mm ≤ D3 ≤ 45.5 mm. The outer diameters of the various parts of the second insulation section are sensibly selected according to the inner diameter of the battery housing, thereby optimizing the structural arrangement within the housing and reducing assembly difficulty.

[0038] In some embodiments, the first insulation section comprises a second through-hole and a groove located on a first side and surrounding the second through-hole. The electrode post is guided through the second through-hole, so that the first mounting section is received in the groove. By arranging the groove to receive the first mounting section, this application can efficiently utilize the interior space of the housing, reduce the space required by any component other than an electrode plate within the housing, and increase the battery capacity.

[0039] In some embodiments, the insulating component further comprises at least one projection. The at least one projection is located on a first side of the first insulating section and is configured to bear against the current collector component. The projection can bear against the surface of the current collector component to provide a supporting force for the current collector component and thereby reduce the deformation of the current collector component under load.

[0040] In some embodiments, the at least one projection, the first insulation section, and the second insulation section are injection-molded in one piece. This one-piece injection molding allows an insulation component with a complex surface to be produced in a single pass, thereby reducing the labor required for post-processing the components and lowering manufacturing costs.

[0041] In some embodiments, the insulating component is bonded to an inner surface of the housing, which simplifies the assembly of the insulating component and improves the reliability of the insulation.

[0042] In some embodiments, at least one notch is provided at the end of the second insulation section facing away from the first insulation section. The notch can provide deformation space for the process of inserting the insulation component into the housing and for the process of fitting a tab, thereby relieving stresses and reducing the difficulty of assembly.

[0043] According to a second aspect, one embodiment of this application provides a battery. The battery comprises the battery cell disclosed in the embodiment above.

[0044] According to a third aspect, one embodiment of this application provides an electrical device. The electrical device comprises the battery disclosed in the embodiment above. The battery is configured to provide electrical energy.

[0045] The foregoing description is merely an overview of the technical solutions of this application. Some specific embodiments of this application are described below for illustrative purposes, to provide a clearer understanding of the technical solutions of this application, to facilitate the implementation of the technical solutions based on the subject matter of this application, and to make the foregoing and other objectives, features, and advantages of this application clearer and more comprehensible. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Unless otherwise indicated, identical reference numerals in multiple drawings denote identical or similar components or elements. The drawings are not necessarily to scale. Naturally, the drawings merely represent some embodiments of this application and are not to be understood as limiting the scope of this application. Fig. Figure 1 is a schematic structural diagram of a vehicle according to some embodiments of this application; Fig. Figure 2 is a schematic exploded view of a battery according to some embodiments of this application; Fig. 3 is a front view of a battery cell according to some embodiments of this application; Fig. 4 is a cross-sectional view of the in Fig. 3 shown battery cell, cut along an AA direction; Fig. Figure 5 is a three-dimensional view of an insulation component according to some embodiments of this application; Fig. Figure 6 is a cross-sectional view of an insulation component according to some embodiments of this application, cut along a CC direction; Fig. Figure 7 is a cross-sectional view of an insulation component according to some other embodiments of this application, cut along a CC direction; Fig. 8 is a close-up view of a Fig. Part B shown in section 4; Fig. 9 is a cross-sectional view of a section along a Fig. 3 AA direction shown according to some other embodiments of this application; Fig. 10 is a close-up view of a Fig. Part D shown in section 9; Fig. Figure 11 is a cross-sectional view of an insulation component according to some further embodiments of this application, cut along a CC direction; Fig. Figure 12 is a cross-sectional view of an insulation component according to some further embodiments of this application, cut along a CC direction; Fig. Figure 13 is a three-dimensional view of an insulating component according to some other embodiments of this application; and Fig. Figure 14 is a three-dimensional view of an insulating component according to some further embodiments of this application. List of reference symbols:

[0047] Vehicle 1000; Battery 100, control unit 200, motor 300; Box 10, first part 11, second part 12; Battery cell 20, housing 21, side wall 211, first end wall 212, electrode assembly 22, first tab 221, main section 222, active material area 2221, insulation area 2222, current collection component 23, insulation component 24, first insulation section 241, first through-hole 2411, receptacle 2412, projection 2413, second insulation section 242, connecting section 2421, guide section 2422, extension section 2423, notch 243, electrode post 25, first mounting section 251, electrode post body 252, second mounting section 253, end cap 26, first direction X, second direction Y. DETAILED DESCRIPTION

[0048] Some embodiments of the technical solutions of this application are described in detail below with reference to the drawings. The following embodiments serve only as examples to describe the technical solutions of this application more clearly, but are not intended to limit the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as they would normally be understood by a person skilled in the art in the field of this application. The terms used herein serve only to describe specific embodiments and not to limit this application. The terms "comprise" and "include," and all variations thereof, used in the description, claims, and short description of the drawings of this application, are to be understood as non-exclusive inclusions.

[0050] In the description of some embodiments of this application, the technical terms "first" and "second" serve only to distinguish between different elements and are not intended to indicate or imply any relative importance or to implicitly define the number of technical features specified, a particular order, or a ranking. In the description of some embodiments of this application, "a plurality of" means, unless expressly stated otherwise, two or more.

[0051] The reference to a “form” here means that a particular feature, structure, or property described with reference to that embodiment may be included in at least one embodiment of this application. Reference to this term at various points in the description does not necessarily refer to the same embodiment, nor does it represent an independent or alternative embodiment that is mutually exclusive with other embodiments. A person skilled in the art understands, expressly and implicitly, that the embodiments described herein may be combined with other embodiments.

[0052] In the description of embodiments of this application, the term "and / or" merely denotes a relationship between related elements and represents three possible relationships. For example, "A and / or B" can denote the following three circumstances: only A, both A and B, and only B. Furthermore, the symbol " / " here generally denotes an "or" relationship between the element preceding the symbol and the element following the symbol.

[0053] In the description of embodiments of this application, the term "a plurality of" means two or more (including two). Likewise, "a plurality of groups" means two or more groups (including two groups) and "a plurality of pieces" means two or more pieces (including two pieces).

[0054] In the description of the embodiments of this application, where a direction or positional relationship is designated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "top", "bottom", "in front", "after", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential", such terms are based on the representation in the drawings and serve only to simplify or brevity the description of the embodiments of this application. They are not intended to indicate or imply that the specified device or component is necessarily located in the specified direction or is designed or operated in the specified direction. Therefore, such terms are not to be understood as limiting the embodiments of this application.

[0055] Unless expressly stated and defined otherwise, in the description of this application, technical terms such as "assemble", "join", "connected", and "fasten" are used in their broadest sense and mean, for example, a permanent connection, a detachable connection, or a one-piece configuration; or they mean a mechanical connection or an electrical connection; or they mean a direct connection or an indirect connection established via an intermediary; or they mean the internal communication between two components or the interaction between two components. A person skilled in the art may understand the specific meanings of the terms in some embodiments of this application according to the specific situations.

[0056] As market trends show, the use of high-performance batteries is becoming increasingly widespread. They are not only used in energy storage systems such as hydroelectric, thermal, wind, and solar power plants, but also in transportation devices like e-bikes, e-motorcycles, and e-cars, as well as in many other sectors such as military equipment and aerospace. Market demand for high-performance batteries continues to rise as their applications expand.

[0057] The applicant has determined that when an electrode assembly of a battery is electrically connected to an electrode output structure, a negative tab of the electrode assembly is electrically connected to a battery casing via a current collection component, and a positive tab of the electrode assembly is electrically connected to the electrode post via the current collection component. To avoid a short circuit, contact between the positive tab of the battery and the casing must be avoided when connecting the positive tab to the electrode post.

[0058] To prevent short circuits, an insulating component can be placed between a connecting structure and the housing, with the connecting structure electrically connected to the positive electrode. For example, an insulating adhesive is applied between the electrode assembly and the housing, and any excess adhesive is smoothed. However, if the insulation is created by gluing, the edge of the insulating adhesive can ripple, leading to an insulation fault. Furthermore, this insulation method results in a slow production rate and reduces product manufacturing efficiency.

[0059] Based on the considerations mentioned above, the applicant, after thorough research, developed an insulating component for use in a battery cell to solve the problem of unreliable insulation between the positive electrode of the battery and the housing. The insulating component comprises a first insulating section and a second insulating section. The second insulating section is located on the circumference at an outer edge of the first insulating section and projects forward to one side. The insulating component is located inside the battery housing. The first insulating section is situated between the first end wall of the housing and the first tab of the electrode assembly. At least a portion of the second insulating section is located between the first tab of the electrode assembly and the side wall of the housing.The first insulation section and the second insulation section are arranged from different directions between the first tab and the housing, thereby isolating the electrode output sections of different polarities of the battery cell, reducing the risk of a short circuit connection in the battery cell and improving the reliability of the battery.

[0060] The installed insulating component occupies part of the available space within the battery housing, thereby reducing the battery's capacity or even affecting a significant portion of the electrode plate. This, in turn, leads to a narrowing of the electrode arrangement, resulting in excessive local stress on the electrode plate and causing undesirable losses (such as lithium plating). By further optimizing the structural shape and dimensions of the insulating component, the applicant enables it to fit the arrangement and the available space within the housing, thereby maximizing its insulating effect and minimizing adverse effects on other components, such as the electrode arrangement.

[0061] The battery cell disclosed in the embodiments of this application is suitable for use in electrical devices such as vehicles, watercraft, or aircraft, but is not limited to such use. A power supply system for the electrical devices can be formed using the battery cell, battery, and the like disclosed herein to improve the reliability of the insulation between the electrode output sections of different polarities in the battery.

[0062] One embodiment of this application provides a battery-powered electrical device. The electrical device may be, but is not limited to, a mobile phone, tablet, laptop, electric toy, power tool, electric car, electric vehicle, ship, spacecraft, or the like. The electric toy may include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, and the like. The spacecraft may include an airplane, rocket, space shuttle, spacecraft, and the like.

[0063] To simplify the description in the following embodiments, a vehicle 1000 is used as an example of the electrical device according to an embodiment of this application.

[0064] Referring to Fig. 1 is Fig. 1 A schematic structural diagram of a vehicle 1000 according to some embodiments of this application. The vehicle 1000 can be an oil-powered vehicle, a natural gas vehicle, or a new energy vehicle. The new energy vehicle can be a battery-electric vehicle, a hybrid electric vehicle, an electric vehicle with extended range, or the like. A battery 100 is arranged inside the vehicle 1000. The battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be configured to supply power to the vehicle 1000. For example, the battery 100 can serve as the operating power supply for the vehicle 1000. The vehicle 1000 can further comprise a control unit 200 and a motor 300.The control unit 200 is configured to control the battery 100 to supply power to the motor 300, for example to meet the electrical power requirements when starting, driving or operating the vehicle 1000.

[0065] In some embodiments of this application, the battery 100 not only serves as the operating power supply of the vehicle 1000, but can also serve as the drive power supply of the vehicle 1000 in order to provide drive energy for the vehicle 1000 instead of or partially instead of fuel oil or natural gas.

[0066] Referring to Fig. 2 is Fig. 2 An exploded view of a battery 100 according to some embodiments of this application. The battery 100 comprises a box 10 and a battery cell 20. The battery cell 20 is contained in the box 10. The box 10 is configured to provide a receiving space for the battery cell 20. The box 10 can have various structures. In some embodiments, the box 10 can comprise a first part 11 and a second part 12. The first part 11 and the second part 12 fit together and cover each other. The first part 11 and the second part 12 together form a receiving space configured to accommodate the battery cell 20. The second part 12 can be a hollow structure open at one end. The first part 11 can be a plate-like structure. The first part 11 fits onto the opening of the second part 12, so that the first part 11 and the second part 12 together form the recording space.Alternatively, both the first part 11 and the second part 12 can be hollow structures open on one side. The opening of the first part 11 fits onto the opening of the second part 12. The box 10 formed by the first part 11 and the second part 12 can, of course, have various shapes, such as a cylinder or a cuboid.

[0067] The battery 100 can contain a plurality of battery cells 20. The plurality of battery cells 20 can be connected in series, parallel, or in a series-parallel arrangement. The series-parallel arrangement refers to a combination of series and parallel connection of the plurality of battery cells 20. The plurality of battery cells 20 can be connected directly in series, parallel, or in a series-parallel arrangement, and then all of the plurality of battery cells 20 can be accommodated in the box 10. Alternatively, to form a battery 100, the plurality of battery cells 20 can first be connected in series, parallel, or in a series-parallel arrangement to form a battery module, and then a plurality of battery modules are connected in series, parallel, or in a series-parallel arrangement to form a whole that is accommodated in the box 10. The battery 100 can further comprise other structures.For example, the battery 100 can additionally include a busbar component. The busbar component is configured to establish an electrical connection between the multitude of battery cells 20.

[0068] Each battery cell 20 can be a secondary or primary battery, but is not limited to either; or it can be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. The battery cell 20 can have a shape such as a cylinder, a flat body, a cuboid, or other shapes.

[0069] Referring to Fig. 3 to Fig. 5 is Fig. 3 a schematic exploded view of a battery cell 20 according to some embodiments of this application; Fig. 4 is a cross-sectional view of the in Fig. 3 Battery cell 20 shown, which is cut along an AA direction; and Fig. Figure 5 is a three-dimensional view of an insulating component 24 according to some embodiments of this application. The battery cell 20 is a minimal unit of a battery. As in Fig. 3 and Fig. As shown in Figure 4, the battery cell 20 comprises a housing 21, an electrode assembly 22, an insulating component 24, and an electrode post 25. The housing 21 includes a side wall 211 and a first end wall 212, which is connected to the side wall. The electrode post 25 is dielectrically mounted to the first end wall 212 of the housing 21. The electrode assembly 22 is located within the housing 21. The electrode assembly 22 comprises a first tab 221 and a main section connected to the first tab. The first tab 221 faces the first end wall 212 and is electrically connected to the electrode post 25. The insulation component 24 comprises a first insulation section 241 and a second insulation section 242. The second insulation section 242 is arranged on the circumference at an outer edge of the first insulation section 241 and projects towards a side on which the electrode arrangement 22 is located.The first insulation section 241 is located between the first end wall 212 and the first tab 221. At least part of the second insulation section 242 is located between the first tab 221 and the side wall 211.

[0070] The housing 21 is a component configured to form an internal environment for the battery cell 20. This internal environment can accommodate the electrode assembly 22, an electrolyte solution, and other components. The housing 21 comprises a side wall and a first end wall 212 located at one end of the side wall 211. The first end wall 212 can be formed as a single piece with the side wall 211. An opening is formed at one end of the side wall 211 opposite the first end wall 212. This opening allows the electrode assembly 22 to be inserted into the housing 21. Alternatively, the first end wall 212 can be an end cap manufactured separately from the side wall 211 and configured to fit onto and cover the opening in the side wall 211. The housing 21 can also include a second end wall.The second end wall and the first end wall 212 are arranged opposite each other and are each located at opposite ends of the side wall 211. The housing 21 can vary in shape and size. For example, the housing arrangement can be cuboid, cylindrical, hexagonal-prismatic, or the like. In particular, the shape of the housing 21 can depend on the specific shape and size of the electrode arrangement 22. The housing 21 can be made of a variety of materials such as copper, iron, aluminum, stainless steel, aluminum alloy, or plastic, and the materials are not particularly limited in this respect.

[0071] The electrode assembly 22 is a component in which electrochemical reactions take place in the battery cell 20. The housing 21 can contain one or more electrode assemblies 22. The electrode assembly 22 typically consists of a positive electrode plate and a negative electrode plate wound or stacked together. Generally, a separator is arranged between the positive and negative electrode plates. The portions of the positive and negative electrode plates coated with an active material form a body section of the electrode assembly. The portions of the positive and negative electrode plates that are not coated with an active material each form a tab. The positive and negative tabs may be located together at one end of the body section or at opposite ends of the body section.During a charging and discharging process of the battery, the positive and negative active materials react with an electrolyte solution. The tabs are connected to electrode terminals to form an electrical circuit. The first tab 221 is formed at one end near the first end wall 212. In one example, the first tab 221 can be a positive tab. The first tab 221 is electrically connected to the electrode post 25.

[0072] The electrode post 25 is an electrode terminal that is electrically connected to the first tab 221. The electrode post 25 passes through the first through-hole in the end wall 212, so that it is electrically connected to the first tab 221 in the housing 21. The electrode post 25 is dielectrically connected to the end wall 212 to prevent a short circuit when the housing 21 is electrically connected to the negative tab.

[0073] The insulating component 24 can be made of various materials such as rubber or plastic. The shape of the insulating component 24 can be designed according to the arrangement and space within the housing 21 such that it comprises a first insulating section 241 and a second insulating section 242. The first insulating section 241 can be flat and have a first side and a second side that are arranged opposite each other. The second side is configured to rest against the inner surface of the first end wall 212, so that the first insulating section 241 can be inserted into the housing 21 to maintain insulation between the first end wall 212 of the housing 21 and the first tab 221.The second insulation section 242 projects from the first side towards the side where the electrode arrangement 22 is located, so that at least a part of the second insulation section 242 is located between the first tab 221 of the electrode arrangement 22 and the side wall 211 of the housing 21 in order to provide insulation between the first tab and the side wall.

[0074] According to one embodiment of this application, an insulating component 24, which corresponds to the shape of the housing, is arranged in the housing 21. The insulating component 24 comprises a first insulating section 241 and a second insulating section 242. The first insulating section 241 is located between the first tab 221 and the first end wall 212. At least a portion of the second insulating section 242 is located between the first tab 221 and the side wall 211, thereby isolating the first tab 221 from the housing 21 from various directions and reducing the probability of a short circuit inside the battery.

[0075] Fig. 6 is a cross-sectional view of the in Fig. Insulation component 24 shown in Figure 5, sectioned along a CC direction. In some embodiments, as in Figure 5, the insulation component 24 is shown in section 5. Fig. As shown in Figure 6, the second insulation section 242 includes a guide section 2422. The guide section 2422 is located at an end of the second insulation section 242 facing away from the first insulation section 241. Along a direction leading away from the first insulation section 241, an inner surface of the guide section 2422 is inclined closer to the side wall 211.

[0076] The second insulating section 242 forms an opening at an end facing away from the first insulating section 241. The guide section 2422 is an end of the second insulating section 242 facing away from the first insulating section 241 and is an end located close to the opening. Along the direction away from the first insulating section 241, the inner surface of the guide section 2422 is inclined closer to the side wall 211, which means that the opening formed by the second insulating section gradually widens. At least part of the second insulating section 242 is located between the side wall 211 of the housing 21 and the electrode assembly 22.During assembly, part of the first tab 221 of the electrode arrangement 22 must protrude into the opening formed by the second insulation section 242 in order to establish the electrical connection between the first tab 221 and the electrode post 25, so that at least part of the guide section 2422 is located between the first tab 221 and the side wall 211.

[0077] Along the direction away from the first insulation section 241, the inner surface of the guide section 2422 is inclined closer to the side wall 211, making it easier for the first tab 221 of the electrode assembly 22 to enter the receiving space defined by the second insulation section 242 during assembly. Simultaneously, the inclined inner surface of the guide section 2422 can also exert a force on one end of the first tab 221, with the end being located near the first end wall 212. This force causes the first tab to fold towards the center of the battery, thus facilitating the electrical connection between the first tab 221 and the electrode post 25.

[0078] In some embodiments, the guide section 2422 gradually tapers in thickness along the direction away from the first insulation section 241.

[0079] The guide section 2422 extends in one direction away from the first insulation section 241, and the thickness of the guide section 2422 is the dimension perpendicular to its direction of extension. In one embodiment, the second insulation section 242 can extend along a direction perpendicular to the plane in which the first insulation section 241 is located, and the thickness of the guide section 2422 is the thickness along a direction parallel to the plane in which the first insulation section 241 is located.

[0080] The insulating component 24 is located inside the housing 21, thus occupying some of the space within the housing and reducing the battery's capacity density. The tapered guide section 2422 can improve the utilization of the space within the housing 21.

[0081] Fig. 7 is a cross-sectional view of the in Fig. 5 Insulation component 24 shown according to some other embodiments of this application, which is cut along a CC direction. As in Fig. As shown in Figure 7, in some embodiments the second insulating section 242 comprises a connecting section 2421. Two ends of the connecting section 2421 are each connected to the first insulating section 241 and the guide section 2422. The thickness of the connecting section 2421 is greater than or equal to the maximum thickness of the guide section 2422.

[0082] The connecting section 2421 is connected to the first insulating section 241 via a chamfered or rounded transition. The connecting section 2421 is located closer to the first end wall 212, and the end of the first tab 221, which is located near the first end wall 212, tends to fold over towards the center to allow an electrical connection with the electrode post 25. Therefore, the area where the connecting section 2421 is located is less sensitive to the thickness of the second insulating section than the area where the guide section 2422 is located. The thickness of the connecting section 2421 can be uniform or variable. In particular, the minimum thickness of the connecting section 2421 can be greater than or equal to the maximum thickness of the guide section 2422.

[0083] The fact that the thickness of the connecting section 2421 is greater than or equal to the maximum thickness of the guide section 2422 facilitates the manufacture and processing of the insulating component 24 and reduces the manufacturing and processing difficulties caused by excessive thinness. On the other hand, the relatively small thickness of the guide section 2422 of the second insulating section 242, which is located closer to the electrode assembly 22, can reduce the space occupied in the housing 21 and mitigate the compression deformation of the electrode assembly 22 caused by the second insulating section 242.

[0084] In some embodiments, the difference between the thickness of the connecting section 2421 and the thickness of the first insulating section 241 is less than or equal to 0.2 mm.

[0085] The thickness of the first insulation section 241 refers to the thickness of the first insulation section 241 along a direction perpendicular to the first end wall 212. The thickness of the connecting section 2421 refers to the thickness along a direction perpendicular to the extension direction of the connecting section 2421. The thickness of the connecting section 2421 can be constant or variable. The first insulation section 241 and the second insulation section 242 can be injection molded in one piece or manufactured separately and then joined together. Understandably, the second insulation section 242 is a structure arranged around the perimeter along the edge of the first insulation section 241. If the thickness of the second insulation section is too small, or if the difference in thickness between the second insulation section and the first insulation section 241 is too large, significant manufacturing and processing difficulties arise.Particularly for the connecting section 2421 at the connection point, it is difficult to ensure a desired structural strength at the connection point due to the large difference in thickness.

[0086] By limiting the thickness difference between the connecting section 2421 and the first insulation section 241 to less than or equal to 0.2 mm, an excessive thickness difference between the first insulation section 241 and the second insulation section 242, in particular the thickness difference at the connection point, can be avoided, thereby facilitating the manufacture and processing of the insulation component 24 and mitigating the adverse effect of an abrupt change in thickness on the strength.

[0087] In some embodiments, the thickness of the connecting section 2421 is smaller than the thickness of the first insulating section 241.

[0088] The size of the distance between the electrode arrangement 22 and the side wall 211 of the housing 21 has a significant influence on the battery's capacity. By limiting the thickness of the connecting section 2421 of the second insulation section 242 so that it is smaller than the thickness of the first insulation section 241, the space occupied by the second insulation section 242 in the housing can be minimized and the battery's capacity loss reduced.

[0089] In some embodiments, the thickness of the connecting section 2421 is equal to the thickness of the first insulating section 241.

[0090] The thickness of the connecting section 2421, which corresponds to the thickness of the first insulation section 241, facilitates the integral forming of the insulation component 24 during manufacturing and reduces production time. The identical thickness of both sections also contributes to ensuring high structural strength at the connection point between the two sections.

[0091] Fig. 8 is a close-up view of a Fig. Part B shown in section 4. In some embodiments, as in Fig. As shown in Figure 8, the electrode post 25 comprises an electrode post body 252 and a first fastening section 251 and a second fastening section 253, each located at opposite ends of the electrode post body 252. The first fastening section 251 is located on a side of the first end wall 212 facing the electrode assembly 22. The second fastening section 253 is located on a side of the first end wall 212 facing away from the electrode assembly 22. The first end wall 212 is provided with a mounting through-hole. The electrode post body 252 is at least partially received in the mounting through-hole. The first fastening section 251 and the second fastening section 252 are configured to clamp a portion of the first end wall 212.

[0092] The battery cell further comprises a current collection component 23. The current collection component 23 is located at least partially between the first tab 221 and the first mounting section 251 and is electrically connected separately to the first tab 221 and the first mounting section 251. Part of the first insulation section 241 is located between the first mounting section 251 and the first end wall 212.

[0093] The first fastening section 251 and the second fastening section 252 are each located at the two ends of the electrode post body 252 and project beyond the electrode post body 252 to form a groove for clamping the first end wall 212. As shown in Fig. As shown in Figure 8, in one example, the first mounting section 251, the second mounting section 252, and the electrode post body 252 can form a U-shaped groove. A mounting through-hole is provided in the first end wall 212. The first insulation section 241 is provided with a first through-hole 2411, which corresponds to the mounting through-hole. The shapes of the first through-hole 2411 and the mounting through-hole are adapted to the shape of the electrode post 25 to allow the insertion of the electrode post 25 into the mounting through-hole. The side wall of the first end wall 212, in which the mounting through-hole is formed, is received in the groove of the electrode post 25 at its circumference.A part of the first insulation section 241, which is located near the mounting through hole, is arranged between the first fastening section 251 and the first end wall 212, so that the first fastening section 251 maintains an insulating separation when the first end wall 212 is clamped.

[0094] In one example, an insulating component can be arranged between the electrode post body 252 and the side wall of the mounting through-hole of the first end wall 212, and between the second mounting section 253 and a side of the first end wall 212 facing away from the electrode assembly 22, to maintain an insulating connection and prevent a short circuit. For example, the cross-section of the insulating component can be L-shaped. The insulating component is clamped between the electrode post 25 and the first end wall 212 and works in conjunction with the insulating component 24 to establish an insulating connection between a conductive path and the housing 21, the conductive path being formed by the electrode post 25, which is electrically connected to the first tab.

[0095] The current collection component 23 is a component made of a conductive material such as copper, designed to collect current. After collecting the current generated in the electrode assembly 22, the current collection component 23 is connected to an electrode terminal (such as the electrode post 25) to form a current loop. The current collection component 23 is electrically connected separately to the first tab 221 of the electrode assembly 22 and the electrode post 25. In one example, the current collection component 23 is clamped between the first tab 221 and the first mounting section 251 of the electrode post 25 and establishes the electrical connection by welding. The current collection component 23 can be permanently joined to the first tab 221 and the first mounting section 251 by welding. In particular, the welding can be laser welding, ultrasonic welding, resistance welding, or the like.Along the first direction X parallel to the axial direction of the electrode arrangement 22, the first end wall 212, the first insulation section 241, the first fastening section 251, the current collecting component 23 and the first tab 221 are arranged one after the other.

[0096] In these embodiments, the electrode post 25 clamps the first end wall 212 by means of the first mounting section 251 and the second mounting section 252, and part of the first insulation section 241 is clamped between the first mounting section 251 and the first end wall 212 to provide a clamping force perpendicular to the first end wall 212 for the first insulation section 241. This arrangement prevents displacement or misalignment of the insulation component 241, ensures more reliable insulation, and also reduces the distance between the components along the first direction X, thereby making the internal structure of the battery more compact and reducing the space required in the battery housing as well as the loss of capacity density.

[0097] In some embodiments, such as in Fig. As shown in Figure 8, the electrode arrangement 22 further comprises a main section 222. The first tab 221 is connected to the main section 222. The main section 222 comprises an active material region 2221 and an insulating region 2222. The insulating region 2222 is located between the active material region 2221 and the first tab 221.

[0098] The active material region 2221 is an area coated with an active material on the current collector of the electrode plate of the electrode assembly 22. The insulating region 2222 is an area coated with an insulating coating on the current collector of the electrode plate of the electrode assembly 22. The insulating coating can be a ceramic coating, for example, an aluminum oxide ceramic coating. In an example using a lithium-ion battery, the active material region 2221 and the insulating region 2222 are located in a coated region of the positive electrode plate of the electrode assembly 22. The first tab 221 is located at one end of the coated region of the positive electrode plate, with the end being near the first end wall 212.To reduce the occurrence of unwanted losses (such as lithium plating), the active material area of ​​the negative electrode plate completely overlaps the active material area of ​​the positive electrode plate during the winding of the battery electrode plate. This ensures that as many lithium ions as possible are deintercalated from the positive electrode and intercalated into the negative electrode. The insulating area 2222 is located between the active material area 2221 of the positive electrode and the first tab 221, allowing the insulating coating in the insulating area 2222 to reduce surface burrs. The insulating area 2222 is positioned correspondingly to the area of ​​excess active material on the negative electrode plate.

[0099] The insulating area 2222, located between the active material area 2221 and the first tab 221, can reduce the risk of short circuits caused by burrs and the likelihood of short circuits due to an overlapping connection between the positive and negative electrodes. The insulating coating in the insulating area 2222 covers the surface of the current collector to reduce direct contact between the film and the electrolyte solution in the battery, thereby improving battery performance.

[0100] In some embodiments, the connecting section 2421 extends along a direction from the first end wall 212 to the electrode arrangement 22, i.e. the first direction X, not beyond an end of the insulation area 2222 that is close to the first end wall 212.

[0101] The insulation region 2222 comprises a first end near the first end wall 212 and a second end near the active material region 2221. The first end is connected to the first tab 221. The first tab 221 can be folded or bent towards the center of the electrode assembly 22 and connected to the current collection component 23. Therefore, the region corresponding to the first end of the insulation region 2222 in the battery cell, on one side near the first end wall 212, is more tolerant of the thickness of the second insulation section 242 than the region corresponding to the first end of the insulation region 2222, on one side near the active material region 2221.Along the first direction X, the connecting section 2421 does not extend beyond an end of the insulation area 2222 that is close to the first end wall 212, meaning that the length of the connecting section 2421 along the first direction X does not exceed the length from the first end of the insulation area 2222 to the first insulation section 241. In other words, along the first direction X, the connection point between the connecting section 2421 and the guide section 2422 is located on one side of the first end of the insulation area 2222, with this side being close to the first end wall 212.

[0102] In these embodiments, the connecting section 2421 is controlled such that it does not extend beyond either end of the insulation region 2222 along the first direction X, with the end being located near the first end wall 212. Therefore, the connecting section 2421, which is relatively thick in the second insulation section 242, can bypass the insulation region 2222, thereby mitigating the crushing effect of the second insulation section 242 on the electrode assembly when the second insulation section is located between the electrode assembly 22 and the side wall 211, and reducing the loss of capacitance density. Furthermore, the connecting section 2421 bypasses the insulation region 2222, allowing the guide section 2422 to be positioned according to the first tab 221.In this way, the inclined inner surface of the guide section 2422 can be used to fold the first tab 221 towards the center, thereby facilitating the connection between the first tab 221 and the current collection component 23.

[0103] In some embodiments, such as in Fig. 7 to Fig. As shown in Figure 8, along the first direction X, i.e. the thickness direction of the first end wall 212, the length h1 of the connecting section 2421, the thickness t1 of the first fastening section 251, the thickness t2 of the current collecting component 23 and the height t3 of the first tab 221 satisfy: h1 ≤ t1 + t2 + t3.

[0104] The surface of the first fastening section 251 on the side facing away from the first tab 221 rests against the first side of the first insulating section 241. The current collection component 23 can be flat-plate shaped. Its specific shape can be designed according to the shape of the battery cell and the connection position of the first tab. For example, the current collection component can be a circular current collection disk. The height t3 of the first tab 221 denotes a measure of the first tab along the first direction X. If the first tab 221 is bent, the height t3 of the first tab 221 denotes the height of the first tab along the first direction X after the first tab has been bent.

[0105] The length of the connecting section 2421 is defined such that it is less than the sum of the heights of the first fastening section 251, the current collection component 23, and the first tab 221. In this case, the connecting section 2421 is positioned correspondingly to the first fastening section 251, the current collection component 23, and the first tab 221. Such components place relatively low demands on the space requirement in the area near the side wall 211. The connecting section 2421 can be thick enough to meet the structural and processing requirements of the insulating component 24, thus avoiding poor formability due to insufficient thickness.Furthermore, this arrangement causes the connecting section 2421 to be offset from the main section 222 of the electrode arrangement 22, thus preventing the relatively thick connecting section 2421 from occupying the space for the arrangement of the main section 222 in the housing 21, and reducing the capacity loss in the battery.

[0106] In some embodiments, such as in Fig. As shown in Figure 8, the guide section 2422 extends along a direction from the first end wall 212 to the electrode arrangement 22, i.e. the first direction X, not beyond an end of the insulation area 2222 which is close to the area 2221 with active material.

[0107] The guide section 2422 does not extend beyond an end of the isolation area 2222 that is near the area 2221 with active material, which means that the length from one end of the guide section 2422 facing away from the first isolation section 241 to the first end wall 212 along the first direction X is less than the length from one end of the isolation area 2222 that is near the area 2221 with active material to the first end wall 212.

[0108] In these embodiments, the guide section 2422 does not extend beyond an end of the insulation area 2222 along the first direction X that is near the area 2221 with active material, so that the guide section 2422 is offset relative to the area 2221 with active material, thereby mitigating the crushing effect of the second insulation section 242 on the area with active material of the main section 222 of the electrode arrangement 22 and reducing the loss of capacitance density.

[0109] In some embodiments, such as in Fig. As shown in Figure 8, along the thickness direction of the first end wall 212, i.e., the first direction X, the length h1 of the connecting section 2421, the length h2 of the guide section 2422, the thickness t1 of the first fastening section 251, the thickness t2 of the current collecting component 23, the height t3 of the first tab 221 and the height w of the insulation area 2222 satisfy: h1 + h2 ≤ t1 + t2 + t3 + w.

[0110] The insulation region 2222 and the active material region 2221 are arranged sequentially along the first direction X. The insulation region 2222 is located on one side of the electrode plate, with the side being closer to the first end wall 212. The thickness of the insulation coating can be less than the thickness of the active material coating, so that the distance between the plates at the position of the insulation region 2222 is greater than the distance between the plates in the active material region 2221, and can accommodate the insulation component 24 of a certain thickness without excessively stressing the electrode plates or causing excessive capacitance loss.

[0111] The sum of the lengths of the connecting section 2421 and the guide section 2422 is less than the sum of the heights of the first fastening section 251, the current collection component 23, the first tab 221, and the insulation area 2222. In this way, the connecting section 2421 and the guide section 2422 can be arranged offset from the active material area 2221 of the main section 222, thereby mitigating problems such as unwanted losses (e.g., lithium plating) that arise from the second insulation section 242 compressing the active material area 2221 during the cycle.

[0112] Fig. 9 is a cross-sectional view of a section along a Fig. 3 AA direction shown according to some other embodiments of this application; and Fig. 10 is a close-up view of a Fig. Part D shown in section 9. Fig. Figure 11 is a cross-sectional view of an insulating component 24 according to some further embodiments of this application, cut along a CC direction; and Fig. Figure 12 is a cross-sectional view of the insulation component 24 according to some further embodiments of this application, which is cut along a CC direction.

[0113] In some embodiments, such as in Fig. 9 to Fig. As shown in Figure 11, a recess 2412 is formed on one side of the first insulation section 241 facing the electrode arrangement 22. The first mounting section 251 of the electrode post 25 is at least partially received in the recess 2412.

[0114] The recess 2412 is located on the first side of the first insulation section 241, facing the electrode assembly 22. The recess 2412 comprises a bottom surface and a side surface arranged around the perimeter along the edge of the bottom surface. With respect to the first side, the bottom surface is recessed towards the side on which the first end wall 212 is located. In this way, the thickness of the first insulation section 241 within the recess 2412 is less than the thickness outside the recess 2412. The first fastening section 251 can be at least partially received in the recess 2412 and, after assembly, rest against the bottom surface of the recess 2412.

[0115] In one example, the first insulation section 241 and the first end wall 212 are provided with a mounting through-hole through which the electrode post 25 can be passed to bring the electrode out of the housing 21. The receptacle 2412 is arranged around the mounting through-hole such that the mounting through-hole is located within the receptacle 2412. For example, the mounting through-hole is located in the center of the receptacle 2412.

[0116] The receptacle 2412 for receiving the first mounting section 251 can reduce the space occupied by the first mounting section 251 along the first direction X in the battery housing, make the arrangement of the components in the battery more compact, utilize the interior of the housing 21 efficiently and increase the capacity of the battery.

[0117] In some embodiments, such as in Fig. As shown in Figure 10, along the thickness direction of the first end wall 212, i.e. along the first direction X, the depth h0 of the inlet 2412 along the first direction X is less than or equal to the thickness t1 of the first fastening section 251 along the first direction X, where the following condition is satisfied: h0 ≤ t1.

[0118] The depth h0 of the recording 2412 along the first direction X denotes a height difference between the ground surface of the recording 2412 and the first side of the first isolation section 241 along the first direction X.

[0119] One surface of the first mounting section 251 rests against the bottom surface of the receptacle 2412, and another surface of the first mounting section 251 is electrically connected to the power collection component 23. The power collection component 23 is relatively large, making it impractical to position it within the receptacle 2412. If the depth h0 of the receptacle 2412 is greater than the thickness t1 of the first mounting section 251, the first mounting section 251 and the power collection component 23 are separated by a gap and cannot make close contact, making it difficult to connect the first mounting section and the power collection component. For example, a cold solder joint or a soldering defect may occur, compromising the reliability of the connection.The first fastening section 251 protrudes from the receptacle 2412, thus facilitating connection with the power collection component 23. The first fastening section can provide a supporting force for the power collection component 23 and mitigate deformation of the power collection component 23 during welding and use.

[0120] In some embodiments, the connecting section 2421 extends along a direction from the first end wall 212 to the electrode arrangement 22, i.e. the first direction X, not beyond an end of the insulation area 2222 that is close to the first end wall 212.

[0121] If the receptacle 2412 is arranged on the first side of the first insulation section 241, the connecting section can be arranged such that it does not extend beyond one end of the insulation area 2222 along the first direction X, with the end being located near the first end wall 212, so that it is offset from the insulation area 2222. The advantageous effects of these embodiments have been described in the preceding embodiments and are not repeated here.

[0122] In some embodiments, such as in Fig. 10 and Fig. As shown in Figure 11, along the thickness direction of the first end wall 212, i.e., the first direction X, the depth h0 of the intake 2412, the length h1 of the connecting section 2421, the thickness t1 of the first fastening section 251, the thickness t2 of the current collecting component 23, and the height t3 of the first tab 221 satisfy: h1 ≤ t1 + t2 + t3 - h0.

[0123] When the receptacle 2412 is arranged on the first side of the first insulation section 241, the depth h0 of the receptacle 2412, the length h1 of the connecting section 2421, the thickness t1 of the first fastening section 251, the thickness t2 of the current collection component 23, and the height t3 of the first tab 221 are adjusted to meet the above conditions, allowing the connecting section 2421 to bypass the main section 222 of the electrode arrangement 22 and thus preventing the large thickness of the connecting section 2421 from compressing the main section 222 and occupying space inside the battery housing.

[0124] In some embodiments, such as in Fig. As shown in Figure 10, the guide section 2422 extends along a direction from the first end wall 212 to the electrode arrangement 22, i.e. the first direction X, not beyond an end of the insulation area 2222 which is close to the area 2221 with active material.

[0125] In these embodiments, the guide section 2422 does not extend beyond an end of the insulation area 2222 along the first direction X that is near the area 2221 with active material, so that the guide section 2422 is offset from the area 2221 with active material, thereby mitigating the crushing effect of the second insulation section 242 on the area with active material of the main section 222 of the electrode arrangement 22 and reducing the loss of capacity density of the battery.

[0126] In some embodiments, such as in Fig. 10 and Fig. As shown in Figure 11, along the thickness direction of the first end wall 212, i.e., the first direction X, the depth h0 of the intake 2412, the length h1 of the connecting section 2421, the length h2 of the guide section 2422, the thickness t1 of the first fastening section 251, the thickness t2 of the current collecting component 23, the height t3 of the first tab 221 and the height w of the insulation area 2222 satisfy: h1 + h2 ≤ t1 + t2 + t3 + w - h0.

[0127] By adjusting the sum of the heights of the connecting section 2421 and the guide section 2422 to be less than or equal to the sum of the heights of the first fastening section 251, the current collection component 23, the first tab 221 and the insulation area 2222 minus the depth of the receptacle 2412, the positions of the connecting section 2421 and the guide section 2422 can avoid the position of the area 2221 with active material of the electrode arrangement 22, thereby minimizing the crushing effect of the insulation component on the area with active material and the space occupied by the insulation component, and reducing the loss of capacitance density.

[0128] In some embodiments, such as in Fig. As shown in Figure 8, the thickness t1 of the first fastening section 251 along the first direction X satisfies: 0.4 mm ≤ t1 ≤ 1.2 mm.

[0129] In some embodiments, the thickness t2 of the current collecting component 23 along the first direction X satisfies: 0.2 mm ≤ t2 ≤ 0.6 mm.

[0130] In some embodiments, the height t3 of the first tab 221 along the first direction X satisfies: 0.5 mm ≤ t3 ≤ 1.5 mm.

[0131] In some embodiments, the length h1 of the connecting section 2421 along the first direction X satisfies: 0 < h1 ≤ 3.3 mm.

[0132] In some embodiments, the length h2 of the guide section 2422 along the first direction X satisfies: 1 mm ≤ h2 ≤ 8.5 mm.

[0133] The thickness t1 of the first fastening section 251, the thickness t2 of the current-collecting component 23, and the height t3 of the first tab 221 each denote a dimension along the first direction X. For example, if the first tab 221 is bent or compressed, the height t3 of the first tab 221 denotes the dimension of the first tab along the first direction X after the first tab has been bent or compressed. The extension direction of the second insulation section 242 is not restricted to the direction perpendicular to the plane in which the first insulation section 241 is located. Therefore, the length h1 of the connecting section 2421 and the length h2 of the guide section 2422 denote the lengths along the first direction X and not the inherent lengths.

[0134] Within the battery housing, the larger the other components are, the smaller the available space for accommodating the electrode assembly, and consequently, the lower the battery's capacity. Appropriate values ​​for the height of the first mounting section 251, the thickness of the current collection component 23, and the height of the first tab 221 contribute to efficient use of the volume space within the housing 21, reducing unnecessary capacity losses and increasing the battery's capacity.Accordingly, in order to achieve a desirable level of reliability of the insulating connection and the capacity density of the battery, the selection of suitable length ranges for the connection section 2421 and the guide section 2422 of the second insulation section 242 ensures that the second insulation section 242 is arranged more effectively between the electrode arrangement 22 and the side wall 211, thereby not only achieving the desired insulating effect, but also reducing the crushing effect on the electrode plate and the capacity loss.

[0135] In some embodiments, such as in Fig. 10 and Fig. As shown in Figure 11, the second insulation section 242 further comprises an extension section 2423. The extension section 2423 is connected to an end of the guide section 2422 facing away from the connecting section 2421. The thickness of the extension section 2423 is less than or equal to the minimum thickness of the guide section 2422. The extension section 2423 is located at least partially between the active material area 2221 and the side wall 211.

[0136] The extension section 2423 is located at an end opposite the first insulation section 241. The extension section 2423 can form an opening through which the electrode assembly can be inserted into the housing and electrically connected to the electrode post during assembly. The thickness of the guide section 2422 is non-uniform, and the thickness of the extension section 2423 is less than or equal to the minimum thickness of the guide section 2422, thus reducing the space required in the housing. At least part of the extension section 2423 can be positioned between the active material area 2221 of the main section 222 and the side wall 211 of the housing 21 to provide insulation between them.

[0137] To save space in the electrode assembly, the insulating component is generally not positioned between the active material area 2221 of the electrode assembly and the side wall 211 of the housing 21. Instead, the active material area 2221 of the electrode assembly is separated from the side wall 211 by the separator and the end boundary. However, such an arrangement is not capable of reliably ensuring complete insulation between the two components, especially if the separator is punctured or the battery housing is deformed, resulting in a still relatively high risk of short circuits. In these embodiments, the thinnest extension section 2423 is further arranged at an end of the second insulating section 242 facing away from the first insulating section 241.At least part of the extension section is positioned between the active material area 2221 and the side wall 211, thus providing more reliable physical insulation and reducing the risk of short circuits within the battery. Simultaneously, the thickness of the extension section 2423 can be minimized to reduce the crushing effect on the electrode plate and the resulting capacity loss. Furthermore, the extension section 2423 is arranged around the active material area 2221, thereby limiting the position of the electrode assembly within the casing and improving the stability and reliability of the battery's internal structure.

[0138] In some embodiments, such as in Fig. As shown in Figure 11, the thickness b1 of the connecting section 2421 satisfies: 0.2 mm ≤ b1 ≤ 1 mm, and the thickness b3 of the extension section 2423 satisfies: 0.02 mm ≤ b3 ≤ 0.1 mm.

[0139] The thickness b1 of the connecting section 2421 and the thickness b3 of the extension section 2423 denote the thickness along a direction perpendicular to the extension direction of the respective sections. In an example, both the extension section 2421 and the connecting section 2423 extend along the first direction X, and the corresponding thickness is the thickness along the second direction Y perpendicular to the first direction X. Along the extension direction of the second insulation section 241, the thickness of the connecting section 2421, the thickness of the guide section 2422, and the thickness of the extension section 2423 gradually decrease. In other words, the thickness of the second insulation section 2422 tapers as it approaches the region 2222 containing active material of the electrode arrangement 22.In one example, the thickness of the connecting section 2421 and the thickness of the extension section 2423 remain constant; the thickness b1 of the connecting section 2421 corresponds to a first thickness, the thickness b3 of the extension section 2423 corresponds to a second thickness, and the thickness b2 of the guide section 2422 gradually decreases from the first thickness to the second thickness. In another example, the thickness of the connecting section 2421 and / or the thickness of the extension section 2423 is variable, for example, linearly variable. In this case, the maximum value of the thickness b2 of the guide section 2422 is less than or equal to the minimum thickness of the connecting section 2421, and the minimum value of the thickness b2 of the guide section 2422 is greater than or equal to the maximum thickness of the extension section 2423.

[0140] By optimizing the thickness distribution of the second insulation section 242, the thicknesses of the second insulation section 242 at different positions can meet the arrangement requirements of different areas in the housing 21, thereby not only improving the insulation reliability, but also avoiding compression of the electrode plates in the housing 21 and minimizing the capacity loss of the battery.

[0141] In some embodiments, such as in Fig. As shown in Figure 11, the length h3 of the extension section 2423 along the first direction X satisfies the condition 0 < h3 ≤ 7 mm.

[0142] The length h3 of the extension section 2423 along the first direction X is directly related to the size of the contact area between the second insulating section 241 and the area 2221 containing active material. A suitable contact area can provide a reliable insulating connection between the electrode assembly 22 and the side wall 211 and provide position-limiting support for the electrode assembly 22 along the second direction Y, thereby reducing movement of the electrode assembly 22 within the housing.

[0143] In some embodiments, the housing 21 is cylindrical. The outer edge of the first insulation section 241 is circular. The outer diameter of the second insulation section 242 is less than or equal to the inner diameter of the side wall 211 of the housing 21.

[0144] The second insulation section 242 comprises an inner and an outer surface, arranged opposite each other. The outer diameter of the second insulation section 242 is defined as the diameter of a circular cross-section of the outer surface of the second insulation section 242, cut along a plane perpendicular to the first direction X. The outer surface of the second insulation section 242 fits directly onto and is aligned with the inner surface of the side wall 211 of the housing 21. In some examples, the outer surface of the second insulation section 242 is a flat and planar surface. The inner surface of the second insulation section 242 can have a stepped shape, such that the thickness of the second insulation section 242 changes in steps along the first direction X.

[0145] Since the outer diameter of the second insulation section 242 is less than or equal to the inner diameter of the side wall 211, the insulation component 24 can be easily fitted into the housing 21, which facilitates assembly.

[0146] In some embodiments, the outer diameter of the second insulation section 242, viewed along a direction from the first end wall 212 to the electrode arrangement 22, gradually increases along a direction away from the first insulation section 241.

[0147] The outer diameter of the second insulation section 242 is a measure of the outer surface area facing away from the electrode arrangement 22. The first insulation section 241 is circular, and the second insulation section 242 forms a cylindrical or conical shape along the edge of the first insulation section 241. The outer diameter of the second insulation section 242 gradually increases in a direction away from the first insulation section 241, so that the open end of the second insulation section 242 widens outwards.

[0148] In these embodiments, the widened opening of the second insulation section 242 can provide a closer fit between the second insulation section 242 and the inner surface of the side wall 211 of the housing 21, reduce the capacity loss caused by a gap between the second insulation section and the side wall, and facilitate assembly in the battery.

[0149] Fig. Figure 12 is a cross-sectional view of an insulating component 24 according to some further embodiments of this application, cut along a CC direction. In some embodiments, as in Fig. As shown in Figure 12, the second insulation section 242 comprises a connecting section 2421 and a guide section 2422, arranged sequentially along a direction away from the first insulation section 241. An outer diameter D1 of the connecting section at a junction between the connecting section 2421 and the guide section 2422, an outer diameter D2 of the guide section 2422 at an end facing away from the connecting section 2421, and an inner diameter D of the side wall 211 of the housing 21 satisfy: D1 ≤ D2 ≤ D.

[0150] The outer diameter D2 of the guide section 2422 at an end facing away from the connecting section 2421 refers to the diameter of the outside of the guide section at the opening of the guide section 2422. The outer diameter D1 of the connecting section at the connection point between the connecting section 2421 and the guide section 2422 is also the outer diameter of the connecting section 2421 at an end facing away from the first insulating section 241. The inner diameter D of the side wall 211 refers to the diameter of an inner surface in the cross-section of the side wall 211, which is cut along a plane perpendicular to the first direction X.

[0151] If D1 ≤ D2 ≤ D, the overall outer diameter of the second insulation section 242 gradually increases along a direction away from the first insulation section 241. In particular, the outer diameter can increase stepwise or gradually in a linear, uniform manner.

[0152] By establishing a suitable numerical ratio between the outer diameter of the connecting section 2421 and the outer diameter of the guide section 2422, the insulating component 24 can be smoothly inserted into the housing 21. At the same time, the flared opening of the second insulating section 242 is better suited for a tight fit on the inside of the housing 21, thereby reducing unnecessary capacitance losses.

[0153] In some embodiments, such as in Fig. As shown in Figure 12, the second insulation section 242 further comprises an extension section 2423. The extension section 2423 is located at an end of the guide section 2422 facing away from the connecting section 2421. The outer diameter D3 of the extension section 2423 at an end facing away from the guide section 2422 satisfies: D1 ≤ D2 ≤ D3 ≤ D.

[0154] The guide section 2422 is located between the connecting section 2421 and the extension section 2423. The outer diameter D2 of the guide section 2422 at an end facing away from the connecting section 2421 is actually the outer diameter of the guide section at the connection point between the guide section 2422 and the extension section 2423.

[0155] The outer diameters of the connecting section 2421, the guide section 2422 and the extension section 2423 of the second insulation section 242 at the end opposite the first insulation section 241 increase in stages, which makes it easier to fit the insulation component 24 into the housing 21 and reduces the difficulty of assembly.

[0156] In some embodiments, the inner diameter D of the side wall 211 of the housing satisfies the following conditions: 44.8 mm ≤ D ≤ 45.5 mm. The outer diameter D1 of the connecting section at the connection point between the connecting section 2421 and the guide section 2422 satisfies the following conditions: 43.5 mm ≤ D1 ≤ 45.5 mm. The outer diameter D2 of the guide section 2422 at an end opposite the connecting section 2421 satisfies the following conditions: 44.5 mm ≤ D2 ≤ 45.5 mm. The outer diameter D3 of the extension section 2423 at an end opposite the guide section 2422 satisfies the following conditions: 44.7 mm ≤ D3 ≤ 45.5 mm.

[0157] The outer diameters of the various parts of the second insulation section are sensibly chosen according to the inner diameter of the battery housing, thereby optimizing the structural arrangement in the housing 21 and simplifying the assembly process.

[0158] Fig. Figure 13 is a three-dimensional view of an insulating component 24 according to some other embodiments of this application. In some embodiments, as in Fig. As shown in Figure 13, the insulation component 24 further comprises at least one projection 2413. The at least one projection 2413 is located on a first side of the first insulation section 241 and is configured to abut the current collection component 23.

[0159] The projection 2413 is located on the first side of the first insulation section 241 and protrudes outwards from the surface of the first side. The projections 2413 can be singly or multiply. If there are multiple projections, they can be evenly spaced around the center of the first insulation section 241.

[0160] To fit the insulation component 24 into the housing 21, the projection 2413 can rest against the top of the current collection component 23 to provide a supporting force for the current collection component 23 and thereby reduce the deformation of the current collection component 23 under load.

[0161] In some embodiments, the at least one projection 2413, the first insulation section 241 and the second insulation section 242 are injection molded in one piece.

[0162] One-piece injection molding allows an insulation component 24 with a complex surface to be formed in a single operation, thereby reducing the work required for post-processing the components and lowering manufacturing costs.

[0163] In some embodiments, the insulating component 24 is connected to an inner surface of the housing 21 by gluing.

[0164] The insulation component 24 makes it possible to attach the first insulation section 241 to the inside of the first end wall 212 by gluing; to attach the second insulation section 242 to the inside of the side wall 211 by gluing; and to attach the first insulation section 241 and the second insulation section 242 simultaneously to the first end wall 212 and the side wall 211, respectively.

[0165] The joining method can simplify the assembly of the insulation component 24 and prevent the insulation component 24 from moving or rotating relative to the housing 21 and affecting the connection of other components in the housing, thereby improving the reliability of the insulation.

[0166] Fig. Figure 14 is a three-dimensional view of an insulating component 24 according to some further embodiments of this application. In some embodiments, as in Fig. As shown in Figure 14, at least one notch 243 is provided at an end of the second insulation section 242 facing away from the first insulation section 241.

[0167] The notch 243 is located at an opening-forming end of the second insulation section 242. For example, the notch 243 is located at an end of the extension section 2423 facing away from the first insulation section 241. The number of notches 243 can be single or multiple. If there are multiple notches 243, they are spaced apart along the circumference of the second insulation section 242. In one example, three notches 243 are provided. The notch 243 can be rectangular, trapezoidal, or arcuate. In one example, the length of the notch 243 along the first direction X is greater than the length along the second direction Y.

[0168] The notch 243, which is provided at one end of the second insulation section 242 facing away from the first insulation section 241, provides a deformation space for the process of inserting the insulation component 24 into the housing and the process of fitting a tab, thereby reducing stresses and decreasing the difficulty of assembly.

[0169] According to a second aspect, one embodiment of this application provides a battery. The battery comprises the battery cell disclosed in the embodiment above.

[0170] According to a third aspect, one embodiment of this application provides an electrical device. The electrical device comprises the battery disclosed in the embodiment above. The battery is configured to provide electrical energy.

[0171] In the following, the battery cell 20 is described according to some embodiments of this application with reference to Fig. 3 to Fig. 14 described in more detail.

[0172] The battery cell 20 comprises a housing 21, an electrode assembly 22, a current collection component 23, an insulating component 24, and an electrode post 25. The housing 21 comprises a side wall 211 and a first end wall 212, which is connected to the side wall. The electrode post 25 is dielectrically mounted to the first end wall 212 of the housing 21. The electrode assembly 22 is located within the housing 21. The electrode assembly 22 comprises a first tab 221 and a main section 222 connected to the first tab. The current collection component 23 is electrically connected separately to the first tab 221 and the electrode post 25. The insulation component 24 comprises a first insulation section 241 and a second insulation section 242. The second insulation section 242 is arranged on the circumference at an outer edge of the first insulation section 241 and projects outwards from the first side of the first insulation section 241.The first insulation section 241 is located between the first end wall 212 and the current collection component 23. The second insulation section 242 is located between the electrode arrangement 22 and the side wall 211.

[0173] The electrode post 25 comprises an electrode post body 252 and a first mounting section 251 and a second mounting section 253, each located at opposite ends of the electrode post body 252. The first mounting section 251 is located on the side of the first end wall 212 facing the electrode assembly 22. The second mounting section 253 is located on the side of the first end wall 212 facing away from the electrode assembly 22. The first end wall 212 is provided with a mounting through-hole. The electrode post body 252 is at least partially received in the mounting through-hole. The first mounting section 251 and the second mounting section 252 are configured to clamp a portion of the first end wall 212. The main section 222 comprises an active material region 2221 and an insulating region 2222.The isolation area 2222 is located between the area 2221 with active material and the first tab 221.

[0174] The second insulation section 242 comprises a connecting section 2421, a guide section 2422, and an extension section 2423, arranged sequentially in a direction away from the first insulation section 241. Along the direction away from the first insulation section 241, the inner surface of the guide section 2422 is inclined closer to the side wall 211. The thickness of the connecting section 2421 corresponds to the thickness of the first insulation section 241. The thickness of the connecting section 2421, the thickness of the guide section 2422, and the thickness of the extension section 2423 decrease stepwise. In one example, the thicknesses of the connecting section 2421 and the extension section 2423 remain constant, and the thickness of the guide section 2422 gradually decreases from a first thickness to a second thickness, where the first thickness corresponds to that of the connecting section 2421 and the second thickness corresponds to that of the extension section 2423.

[0175] Along the first direction X, the length h1 of the connecting section 2421, the thickness t1 of the first fastening section 251, the thickness t2 of the current gathering component 23, and the height t3 of the first tab 221 satisfy: h1 ≤ t1 + t2 + t3. Along the first direction X, the length h1 of the connecting section 2421, the length h2 of the guide section 2422, the thickness t1 of the first fastening section 251, the thickness t2 of the current gathering component 23, the height t3 of the first tab 221, and the height w of the insulation area 2222 satisfy: h1 + h2 ≤ t1 + t2 + t3 + w.

[0176] The thickness b1 of the connecting section 2421 satisfies 0.2 mm ≤ b1 ≤ 1 mm, the thickness b3 of the extension section 2423 satisfies 0.02 mm ≤ b3 ≤ 0.1 mm, and the thickness b2 of the guide section 2422 gradually decreases from the thickness b1 of the connecting section 2421 to the thickness b3 of the extension section 2423 in a direction away from the first insulation section 241.

[0177] The length h1 of the connecting section 2421 along the first direction X satisfies 0 < h1 ≤ 3.3 mm, the length h2 of the guide section 2422 along the first direction X satisfies 1 mm ≤ h2 ≤ 8.5 mm and the length h3 of the extension section 2423 along the first direction X satisfies 0 < h3 ≤ 7 mm.

[0178] The inner diameter D of the side wall 211 of the housing satisfies the following conditions: 44.8 mm ≤ D ≤ 45.5 mm. The outer diameter D1 of the connecting section at the connection point between the connecting section 2421 and the guide section 2422 satisfies the following conditions: 43.5 mm ≤ D1 ≤ 45.5 mm. The outer diameter D2 of the guide section 2422 at an end opposite the connecting section 2421 satisfies the following conditions: 44.5 mm ≤ D2 ≤ 45.5 mm. The outer diameter D3 of the extension section 2423 at an end opposite the guide section 2422 satisfies the following conditions: 44.7 mm ≤ D3 ≤ 45.5 mm and D1 ≤ D2 ≤ D3 ≤ D.

[0179] Finally, it should be noted that the foregoing embodiments serve only to describe the technical solutions of this application without limiting the application itself. Although this application has been described in detail with reference to the foregoing embodiments, a person skilled in the art understands that modifications may be made to the technical solutions described in the foregoing embodiments, or that some or all of the technical features in the technical solutions may be replaced by equivalent substitutions. Such modifications and equivalent substitutions fall within the scope of the claims and the description of this application, without the core of the corresponding technical solutions differing from the scope of the technical solutions of the embodiments of this application.In particular, various technical features mentioned in different embodiments can be combined in any way, provided there are no structural conflicts. This application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions that fall within the scope of the claims.

Claims

[1] Battery cell, comprising: a housing comprising a side wall and a first end wall connected to the side wall; an electrode post which is dielectrically mounted on the first end wall; an electrode arrangement located in the housing, wherein the electrode arrangement comprises a first tab and the first tab faces the first end wall and is electrically connected to the electrode post; and an insulating component comprising a first insulating section and a second insulating section, wherein the second insulating section is arranged on the circumference at an outer edge of the first insulating section and projects towards a side on which the electrode arrangement is located, wherein the first insulation section is located between the first end wall and the first tab, and at least part of the second insulation section is located between the first tab and the side wall. [2] Battery cell according to claim 1, wherein the second insulation section comprises a guide section and the guide section is arranged at an end of the second insulation section facing away from the first insulation section; and wherein an inner surface of the guide section is inclined closer to the side wall along a direction leading away from the first insulation section. [3] Battery cell according to claim 2, wherein the guide section gradually tapers in thickness along the direction leading away from the first insulation section. [4] Battery cell according to claim 2 or 3, wherein the second insulation section comprises a connecting section, wherein two ends of the connecting section are each connected to the first insulation section and the guide section, and a thickness of the connecting section is greater than or equal to a maximum thickness of the guide section. [5] Battery cell according to claim 4, wherein the difference between the thickness of the connecting section and the thickness of the first insulating section is less than or equal to 0.2 mm. [6] Battery cell according to claim 5, wherein the thickness of the connecting section is less than the thickness of the first insulating section. [7] Battery cell according to claim 5, wherein the thickness of the connecting section is equal to the thickness of the first insulating section. [8] Battery cell according to any one of claims 4 to 7, wherein the electrode post comprises an electrode post body and a first fastening section and a second fastening section, each located at two ends of the electrode post body, and wherein the first fastening section is located on a side of the first end wall facing the electrode arrangement; wherein the second fastening section is located on a side of the first end wall facing away from the electrode arrangement; wherein the first end wall is provided with a mounting through-hole in which the electrode post body is at least partially received, and wherein the first fastening section and the second fastening section are configured to clamp a portion of the first end wall; wherein the battery cell further comprises a current collection component which is located at least partially between the first tab and the first fastening section and is separately electrically connected to the first tab and the first fastening section; and where part of the first insulation section is located between the first fastening section and the first end wall. [9] Battery cell according to claim 8, wherein the electrode arrangement further comprises a main section to which the first tab is connected, the main section comprising an active material region and an insulating region arranged between the active material region and the first tab. [10] Battery cell according to claim 9, wherein the connecting section does not extend along a direction from the first end wall to the electrode arrangement beyond an end of the insulation area that is located near the first end wall. [11] Battery cell according to claim 10, wherein along a thickness direction of the first end wall a length h1 of the connecting section, a thickness t1 of the first fastening section, a thickness t2 of the current collecting component and a height t3 of the first tab satisfy: h1 ≤ t1 + t2 + t3. [12] Battery cell according to one of claims 9 to 11, wherein the guide section does not extend along a direction from the first end wall to the electrode arrangement beyond an end of the insulation area which is located near the area with active material. [13] Battery cell according to claim 12, wherein along a thickness direction of the first end wall a length h1 of the connecting section, a length h2 of the guide section, a thickness t1 of the first fastening section, a thickness t2 of the current collecting component, a height t3 of the first tab and a height w of the insulation area satisfy: h1 + h2 ≤ t1 + t2 + t3 + w. [14] Battery cell according to claim 9, wherein a receptacle is formed on a side of the first insulation section facing the electrode arrangement; and wherein the first fastening section of the electrode post is at least partially received in the receptacle. [15] Battery cell according to claim 14, wherein along a thickness direction of the first end wall a depth of the recess is less than or equal to a thickness of the first fastening section. [16] Battery cell according to claim 14 or 15, wherein along a direction from the first end wall to the electrode arrangement the connecting section does not extend beyond an end of the insulation area which is located near the first end wall. [17] Battery cell according to claim 16, wherein along a thickness direction of the first end wall a depth h0 of the receptacle, a length h1 of the connecting section, a thickness t1 of the first fastening section, a thickness t2 of the current collecting component and a height t3 of the first tab satisfy: h1 ≤ t1 + t2 + t3 - h0. [18] Battery cell according to one of claims 14 to 17, wherein the guide section does not extend along a direction from the first end wall to the electrode arrangement beyond an end of the insulation area which is located near the electrode arrangement. [19] Battery cell according to claim 18, wherein along a thickness direction of the first end wall, a depth h0 of the receptacle, a length h1 of the connecting section, a length h2 of the guide section, a thickness t1 of the first fastening section, a thickness t2 of the current collecting component, a height t3 of the first tab and a height w of the insulation area satisfy: h1 + h2 ≤ t1 + t2 + t3 + w - h0. [20] Battery cell according to one of claims 9 to 19, wherein along a thickness direction of the first end wall a thickness t1 of the first fastening section satisfies 0.4 mm ≤ t1 ≤ 1.2 mm; a thickness t2 of the current collection component of 0.2 mm ≤ t2 ≤ 0.6 mm is met; a height t3 of the first tab 0.5 mm ≤ t3 ≤ 1.5 mm is satisfied; a length h1 of the connecting section 0 < h1 ≤ 3.3 mm is satisfied; and a length h2 of the guide section 1 mm ≤ h2 ≤ 8.5 mm is fulfilled. [21] Battery cell according to any one of claims 9 to 20, wherein the second insulation section further comprises an extension section which is connected to an end of the guide section which is opposite the connection section; wherein the thickness of the extension section is less than or equal to a minimum thickness of the guide section; and wherein the extension section is arranged at least partially between the area with active material and the side wall. [22] Battery cell according to claim 21, wherein the thickness b1 of the connecting section satisfies: 0.2 mm ≤ b1 ≤ 1 mm, and the thickness b3 of the extension section satisfies: 0.02 mm ≤ b3 ≤ 0.1 mm. [23] Battery cell according to claim 22, wherein a length h3 of the extension section 0 < h3 ≤ 7 mm is satisfied. [24] Battery cell according to claim 22 or 23, wherein the housing is cylindrical; wherein the outer edge of the first insulation section is circular and an outer diameter of the second insulation section is less than or equal to an inner diameter of the side wall of the housing. [25] Battery cell according to claim 24, wherein the outer diameter of the second insulation section gradually increases along a direction from the first end wall to the electrode arrangement. [26] Battery cell according to claim 24 or 25, wherein an outer diameter D1 of the connecting section at a connection point between the connecting section and the guide section, an outer diameter D2 of the guide section at an end facing away from the connecting section and an inner diameter D of the housing satisfy: D1 ≤ D2 ≤ D. [27] Battery cell according to claim 24 or 25, wherein an outer diameter D1 of the connecting section at a connection point between the connecting section and the guide section, an outer diameter D2 of the guide section at an end facing away from the connecting section, an outer diameter D3 of the extension section at an end facing away from the guide section and an inner diameter D of the housing satisfy: D1 ≤ D2 ≤ D3 ≤ D. [28] Battery cell according to claim 27, wherein The inner diameter D of the side wall of the housing meets the following requirements: 44.8 mm ≤ D ≤ 45.5 mm; The outer diameter D1 of the connecting section at the connection point between the connecting section and the guide section meets: 43.5 mm ≤ D1 ≤ 45.5 mm; The outer diameter D2 of the guide section at an end facing away from the connecting section meets the following requirements: 44.5 mm ≤ D2 ≤ 45.5 mm; and The outer diameter D3 of the extension section at an end facing away from the guide section meets the following requirements: 44.7 mm ≤ D3 ≤ 45.5 mm. [29] Battery cell according to one of claims 8 to 27, wherein the insulation component further comprises at least one projection and the at least one projection is arranged on a surface of the first insulation section on one side near the electrode arrangement and is configured to abut the current collection component. [30] Battery cell according to claim 29, wherein the at least one projection, the first insulation section and the second insulation section are injection molded in one piece. [31] Battery cell according to any one of claims 1 to 30, wherein the insulating component is connected to an inner surface of the housing by gluing. [32] Battery cell according to one of claims 1 to 31, wherein at least one notch is provided at an end of the second insulation section facing away from the first insulation section. [33] Battery comprising the battery cell according to any one of claims 1 to 32. [34] Electrical device, wherein the electrical device comprises the battery according to claim 33 and the battery is configured to provide electrical energy.

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