Battery cell and battery pack

Abstract

The application provides a battery monomer and a battery pack, and relates to the technical field of batteries. The battery monomer comprises a shell, a terminal cover connected with the shell, a pole provided in the terminal cover, an electrode assembly provided in the shell and electrically connected with the pole, and an insulating piece provided in the shell. The insulating piece comprises an insulating plate and a first clamping part. The insulating plate is located on the side of the terminal cover close to the electrode assembly. The side of the terminal cover close to the electrode assembly is provided with a second clamping part. The first clamping part is connected to the side of the insulating plate close to the second clamping part. The first clamping part is clamped with the second clamping part. The battery monomer provided by the application improves the stability of the surrounding area of the insulating piece away from the pole through clamping of the first clamping part and the second clamping part, so that the safety of the battery monomer is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery cell and a battery pack. Background Technology

[0002] The information disclosed in this background section is intended only to enhance the understanding of the general background of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art.

[0003] The battery cell is a crucial component of the battery pack. In related technologies, the insulating component is located on the side of the end cap closer to the electrode assembly, and the terminal block passes through the end cap and is electrically connected to the electrode assembly. However, while the insulating component is relatively stable in the terminal block area, its stability is poor in the surrounding areas far from the terminal block, thus affecting the safety of the battery cell. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a battery cell and a battery pack, which aims to solve the technical problem of how to improve the stability of the insulation in the surrounding area far from the terminal post.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, embodiments of this application provide a single battery cell, comprising:

[0007] case;

[0008] End cap, connected to the housing;

[0009] The pole post is inserted into the end cap;

[0010] An electrode assembly is disposed within the housing and electrically connected to the electrode post;

[0011] An insulating component is disposed within the housing. The insulating component includes an insulating plate and a first snap-fit ​​portion connected to each other. The insulating plate is located on the side of the end cap near the electrode assembly. A second snap-fit ​​portion is disposed on the side of the end cap near the electrode assembly. The first snap-fit ​​portion is located on the side of the insulating plate near the second snap-fit ​​portion, and the first snap-fit ​​portion snaps into the second snap-fit ​​portion.

[0012] In some embodiments of the first aspect, the battery cell has a first direction and a third direction perpendicular to each other, the second snap-fit ​​portion is a slot, a portion of the slot is formed by the end cap being recessed in the direction away from the electrode assembly along the third direction, the electrode post and the slot are arranged along the first direction, and the first snap-fit ​​portion is located in the slot.

[0013] In some embodiments of the first aspect, the slot includes a first limiting slot and a second limiting slot that are connected to each other. The second limiting slot is located on the side of the groove wall of the first limiting slot away from the pole post along the first direction. The first locking portion includes a first locking segment and a second locking segment. The second locking segment is connected to the side of the first locking segment away from the pole post along the first direction. The first locking segment is located in the first limiting slot, and the second locking segment is located in the second limiting slot.

[0014] In some embodiments of the first aspect, the battery cell has a second direction that is perpendicular to both the first direction and the third direction, and the first latching segment, the second latching segment, the first limiting groove and the second limiting groove all extend along the second direction.

[0015] In some embodiments of the first aspect, the slot includes a communicating guide groove and a limiting groove, the limiting groove being located between the guide groove and the insulating plate along the third direction, the first snap-fit ​​portion including a connecting section and a snap-fit ​​section, the connecting section being located between the snap-fit ​​section and the insulating plate along the third direction, the connecting section being connected to the insulating plate and the snap-fit ​​section respectively, and passing through the guide groove, the snap-fit ​​section being located within the limiting groove.

[0016] In some embodiments of the first aspect, the outer peripheral side of the snap-fit ​​segment has an annular bevel, and the diameter of the snap-fit ​​segment gradually increases along the third direction from away from the electrode assembly to closer to the electrode assembly.

[0017] In some embodiments of the first aspect, the battery cell has a first orientation, and the number of second snap-fit ​​portions is multiple, with the multiple second snap-fit ​​portions arranged along the first orientation; the number of first snap-fit ​​portions is multiple, with the multiple first snap-fit ​​portions arranged along the first orientation and snap-fitting one-to-one with the multiple second snap-fit ​​portions.

[0018] In some embodiments of the first aspect, the battery cell has a first direction and a third direction that are perpendicular to each other, the insulating plate is provided with a first through hole that extends along the third direction, the electrode post passes through the first through hole, and the first snap-fit ​​portion and the first through hole are spaced apart along the first direction.

[0019] In some embodiments of the first aspect, the first snap-fit ​​portion is integrally formed with the insulating plate; and / or, the second snap-fit ​​portion is integrally formed with the end cap.

[0020] Secondly, embodiments of this application provide a battery pack including the battery cells described in any of the embodiments of the first aspect above.

[0021] The beneficial effects of this application are as follows:

[0022] The battery cell provided in this application has an insulating component including an insulating plate and a first snap-fit ​​portion. The insulating plate is located on the side of the end cap near the electrode assembly, and a second snap-fit ​​portion is provided on the side of the end cap near the electrode assembly. The first snap-fit ​​portion is connected to the side of the insulating plate near the second snap-fit ​​portion. By engaging the first snap-fit ​​portion and the second snap-fit ​​portion, the stability of the area surrounding the insulating component away from the electrode post is improved, thereby enhancing the safety of the battery cell.

[0023] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This application shows a three-dimensional exploded view of a single battery cell in some embodiments;

[0026] Figure 2 It shows Figure 1 A schematic diagram of the assembly structure of the middle end cap and the insulating component from a single perspective;

[0027] Figure 3 It shows Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0028] Figure 4 It shows Figure 3 A magnified structural diagram of region B in the middle;

[0029] Figure 5 It shows Figure 2 Schematic diagram of the three-dimensional decomposition structure Figure 1 ;

[0030] Figure 6 It shows Figure 2 Schematic diagram of the three-dimensional decomposition structure Figure 2 ;

[0031] Figure 7 This application shows a schematic diagram of the assembly structure of the end cap and the insulating component from one perspective in some other embodiments;

[0032] Figure 8 It shows Figure 5 A schematic diagram of the cross-sectional structure at the CC section;

[0033] Figure 9 It shows Figure 6 A magnified structural diagram of region D in the middle;

[0034] Figure 10 It shows Figure 7 Schematic diagram of the three-dimensional decomposition structure Figure 1 ;

[0035] Figure 11 It shows Figure 7 Schematic diagram of the three-dimensional decomposition structure Figure 2 .

[0036] Explanation of key component symbols:

[0037] 100-Battery cell; 110-Housing; 120-Electrode assembly; 121-Electrode body; 122-Taper; 130-End cap; 131-Second through hole; 132-Second snap-fit ​​part; 132A-Snap-fit ​​groove; 1321-First limiting groove; 1322-Second limiting groove; 1323-Guide groove; 1324-Limiting groove; 140-Insulating component; 141-Insulating plate; 142-First snap-fit ​​part; 1421-First snap-fit ​​section; 1422-Second snap-fit ​​section; 1423-Connecting section; 1424-Snap-fit ​​section; 14241-Annular inclined surface; 143-First through hole; 144-First insulating boss; 145-Second insulating boss; 150-Terminal post; X-Second direction; Y-First direction; Z-Third direction. Detailed Implementation

[0038] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0039] In the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] Furthermore, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Moreover, "above" or "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below" or "below" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this application, the terms "first," "second," etc., are used to distinguish different objects and should not be construed as indicating or implying a specific order or primary / secondary relationship, or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0042] In the description of this application, the term "multiple" means two or more, unless otherwise explicitly specified. The term "multiple A and multiple B in one-to-one correspondence" can be understood as: the number of A and the number of B are the same, and there is a one-to-one mapping relationship, that is, each A corresponds to only one B, and each B also corresponds to only one A.

[0043] In the description of this application, unless otherwise explicitly specified, the terms "installation," "connection," "attachment," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] In the description of this application, the term "and / or" can be understood to mean three possibilities. For example, A and / or B can represent: A alone; A and B simultaneously; or B alone. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" relationship.

[0045] In the description of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering. For example, if the angle between two directions is 80° to 90°, the two directions can be considered perpendicular; if the angle between two directions is 0° to 10°, the two directions can be considered parallel.

[0046] The battery cell is a crucial component of the battery pack. In related technologies, the insulating component is located on the side of the end cap closest to the electrode assembly, and the terminal post passes through the end cap and is electrically connected to the electrode assembly. The insulating component serves as an insulating and protective element. However, while the structure of the insulating component is relatively stable in the terminal post area, its stability is poor in the surrounding areas far from the terminal post, thus affecting the safety of the battery cell.

[0047] like Figure 1 As shown, to solve the above-mentioned technical problems, embodiments of this application provide a battery cell 100, which relates to the field of battery technology and is mainly used in battery packs, so as to be indirectly used in electrical devices or energy storage devices in the form of battery packs. Of course, the battery cell 100 can also be directly used in electrical devices or energy storage devices without taking the form of a battery pack, and no specific limitation is made to the application scenarios of the battery cell 100 here.

[0048] For example, electrical devices can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. Vehicles can be gasoline-powered cars, natural gas-powered cars, new energy vehicles, etc., and new energy vehicles can be pure electric vehicles, hybrid electric vehicles, and range-extended electric vehicles, etc.; spacecraft can be airplanes, rockets, space shuttles, drones, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; power tools can be metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.; energy storage devices include energy storage containers, energy storage cabinets, energy storage power stations, wind power generation devices, solar power generation devices, mobile power devices, and temporary power supply devices, etc.; no specific limitations are made on the types of electrical devices and energy storage devices here.

[0049] Combination Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, the battery cell 100 provided in this embodiment includes: a housing 110, an end cap 130, a terminal post 150, an electrode assembly 120, and an insulating component 140.

[0050] The end cap 130 is connected to the housing 110; the electrode post 150 passes through the end cap 130; the electrode assembly 120 is disposed inside the housing 110 and is electrically connected to the electrode post 150; the insulating member 140 is disposed inside the housing 110, and the insulating member 140 includes an insulating plate 141 and a first snap-fit ​​part 142 connected to each other. The insulating plate 141 is located on the side of the end cap 130 near the electrode assembly 120. The side of the end cap 130 near the electrode assembly 120 is provided with a second snap-fit ​​part 132. The first snap-fit ​​part 142 is located on the side of the insulating plate 141 near the second snap-fit ​​part 132, and the first snap-fit ​​part 142 snaps into the second snap-fit ​​part 132.

[0051] For example, the material of the end cap 130 and / or the housing 110 can be aluminum, aluminum alloy, copper, iron, stainless steel, plastic, etc., without specific limitations.

[0052] For example, the material of the electrode 150 can be a metallic conductive material (e.g., copper, aluminum, silver, gold, iron, nickel, etc.) or a non-metallic conductive material (e.g., carbon-based material, superconductor, semiconductor, etc.), without any specific limitation.

[0053] For example, the materials of the insulating component 140 can be selected from the following categories: 1. Synthetic organic insulating materials: plastics (such as polyethylene, polyvinyl chloride, polypropylene, polytetrafluoroethylene, epoxy resin, etc.), synthetic rubber (such as silicone rubber, nitrile rubber, etc.), synthetic fibers (such as polyester fiber, nylon, etc.); 2. Natural organic insulating materials: wood, natural rubber, etc.; 3. Inorganic insulating materials: ceramics, glass, mica, quartz, asbestos, etc.; 4. Polymer insulating materials: polycarbonate, polyimide, etc., without specific limitations.

[0054] It is understood that the battery cell 100 provided in this embodiment includes an insulating member 140 comprising an insulating plate 141 and a first latching portion 142. The insulating plate 141 is located on the side of the end cap 130 near the electrode assembly 120, and a second latching portion 132 is provided on the side of the end cap 130 near the electrode assembly 120. The first latching portion 142 is connected to the side of the insulating plate 141 near the second latching portion 132. By engaging the first latching portion 142 with the second latching portion 132, the stability of the area surrounding the insulating member 140 away from the terminal post 150 is improved, thereby enhancing the safety of the battery cell 100.

[0055] like Figure 1 , Figure 4 , Figure 5 , Figure 9 and Figure 10As shown, in some embodiments, the battery cell 100 has a first direction Y and a third direction Z that are perpendicular to each other. The second snap-fit ​​portion 132 is a slot 132A. A portion of the slot 132A is recessed from the end cap 130 in the direction away from the electrode assembly 120 along the third direction Z. The electrode post 150 and the slot 132A are arranged along the first direction Y. The first snap-fit ​​portion 142 is located in the slot 132A. It can be understood that the first snap-fit ​​portion 142 engages with the slot 132A to achieve snap-fit, thereby improving the stability of the area around the insulating member 140 away from the electrode post 150.

[0056] like Figure 1 , Figure 10 and Figure 11 As shown, the battery cell 100 further has a second direction X perpendicular to the first direction Y. The insulating member 140 also includes a first insulating boss 144 and a second insulating boss 145. The first insulating boss 144 and the second insulating boss 145 are connected to the side of the insulating plate 141 near the electrode assembly 120 and abut against the electrode assembly 120. The first insulating boss 144 and the second insulating boss 145 are spaced apart along the second direction X. A plurality of first snap-fit ​​portions 142 are located between the first insulating boss 144 and the second insulating boss 145 along the second direction X. A plurality of second snap-fit ​​portions 132 are located between the first insulating boss 144 and the second insulating boss 145 along the second direction X. This can make the force on the insulating plate 141 more balanced, thereby helping to improve the stability of the insulating member 140.

[0057] like Figures 2 to 4 As shown, in some specific embodiments, the slot 132A includes a first limiting slot 1321 and a second limiting slot 1322 that are connected to each other. The second limiting slot 1322 is located on the side of the first limiting slot 1321 away from the pole post 150 along the first direction Y. The first locking part 142 includes a first locking segment 1421 and a second locking segment 1422. The second locking segment 1422 is connected to the side of the first locking segment 1421 away from the pole post 150 along the first direction Y. The first locking segment 1421 is located in the first limiting slot 1321, and the second locking segment 1422 is located in the second limiting slot 1322. This effectively restricts the movement of the area around the insulating member 140 away from the pole post 150 relative to the end cap 130, thereby improving the stability of the insulating member 140.

[0058] like Figure 1 as well as Figures 4 to 6As shown, the battery cell 100 further has a second direction X that is perpendicular to both the first direction Y and the third direction Z. The first snap-fit ​​segment 1421, the second snap-fit ​​segment 1422, the first limiting groove 1321 and the second limiting groove 1322 are all extended along the second direction X. This increases the contact area between the insulating member 140 and the end cap 130, making the snap-fit ​​more reliable, thereby further improving the stability of the area around the insulating member 140 away from the terminal post 150.

[0059] like Figures 7 to 9 As shown, in some specific embodiments, the slot 132A includes a communicating guide slot 1323 and a limiting slot 1324. The limiting slot 1324 is located between the guide slot 1323 and the insulating plate 141 along the third direction Z. The first engaging portion 142 includes a connecting section 1423 and an engaging section 1424. The connecting section 1423 is located between the engaging section 1424 and the insulating plate 141 along the third direction Z. The connecting section 1423 is connected to the insulating plate 141 and the engaging section 1424 respectively and passes through the guide slot 1323. The engaging section 1424 is located within the limiting slot 1324. In this way, the movement of the area surrounding the insulating member 140 away from the pole post 150 relative to the end cap 130 can also be effectively restricted, improving the stability of the insulating member 140.

[0060] like Figure 9 As shown, the outer periphery of the snap-fit ​​segment 1424 further has an annular inclined surface 14241, and the diameter of the snap-fit ​​segment 1424 gradually increases along the third direction Z from away from the electrode assembly 120 to near the electrode assembly 120. Thus, when the insulating component 140 is installed, the annular inclined surface 14241 can guide the snap-fit ​​segment 1424 from the guide groove 1323 into the limiting groove 1324, thereby engaging with the limiting groove 1324. This serves as a guide for the snap-fit ​​segment 1424, thereby reducing the installation difficulty of the insulating component 140.

[0061] like Figure 1 , Figure 5 , Figure 6 , Figure 10 and Figure 11 As shown, in some embodiments, the battery cell 100 has a first direction Y, and there are multiple second snap-fit ​​portions 132 arranged along the first direction Y; there are multiple first snap-fit ​​portions 142 arranged along the first direction Y and snap-fitting one-to-one with the multiple second snap-fit ​​portions 132. This allows the end cap 130 and the insulating member 140 to be connected at multiple positions, thereby more effectively improving the stability of the area around the insulating member 140 away from the terminal post 150.

[0062] like Figures 1 to 3As shown, in some embodiments, the battery cell 100 has a first direction Y and a third direction Z that are perpendicular to each other. The insulating plate 141 is provided with a first through hole 143 that extends along the third direction Z. The pole post 150 passes through the first through hole 143. The first snap-fit ​​portion 142 and the first through hole 143 are spaced apart along the first direction Y. This allows the first snap-fit ​​portion 142 to move away from the pole post 150 and the first through hole 143 along the first direction Y, thereby effectively limiting the movement of the area around the insulating member 140 away from the pole post 150 relative to the end cover 130.

[0063] like Figures 1 to 3 As shown, the end cap 130 is further provided with a second through hole 131 extending along the third direction Z. The pole post 150 passes through the second through hole 131. The second snap-fit ​​portion 132 and the second through hole 131 are spaced apart along the first direction Y. This allows the second snap-fit ​​portion 132 to move away from the pole post 150 and the second through hole 131 along the first direction Y, thereby more effectively restricting the movement of the area around the insulating member 140 away from the pole post 150 relative to the end cap 130.

[0064] In some other embodiments, the battery cell 100 has a first direction Y and a third direction Z that are perpendicular to each other. The first snap-fit ​​portion 142 is a slot 132A. A portion of the slot 132A is recessed by the insulating plate 141 along the third direction Z towards the electrode assembly 120. The electrode post 150 and the second snap-fit ​​portion 132 are arranged along the first direction Y. The second snap-fit ​​portion 132 is located in the slot 132A. It can be understood that the second snap-fit ​​portion 132 engages with the slot 132A, which can also achieve snap-fit. The structure of the first snap-fit ​​portion 142 and the second snap-fit ​​portion 132 is not specifically limited here.

[0065] like Figure 3 and Figure 8 As shown, in some embodiments, the first snap-fit ​​portion 142 is integrally formed with the insulating plate 141; and / or, the second snap-fit ​​portion 132 is integrally formed with the end cap 130, which facilitates processing and manufacturing, reduces manufacturing costs, and provides higher strength and stability for the integral structure.

[0066] It should be noted that unibody molding includes stamping, injection molding, die casting, extrusion, blow molding, 3D printing, etc., and no specific type of unibody molding is limited here.

[0067] It should be noted that the battery cell 100 provided in this embodiment mainly relies on the movement of metal ions between the positive and negative electrode plates to operate. The battery cell 100 can be cuboid, cylindrical, flat, or other shapes, and no specific limitation is made here. According to the packaging method, the battery cell 100 provided in this embodiment can be a square battery, a cylindrical battery, a pouch battery, etc., and no specific limitation is made here.

[0068] Furthermore, according to the classification of the physical state of the electrolyte, the battery cell 100 provided in this embodiment can be a liquid battery, that is, it uses a liquid electrolyte. Exemplarily, the electrode post 150 may include a positive electrode post and a negative electrode post. The electrode assembly 120 may be manufactured using a winding process or a stacking process. The electrode assembly 120 may include an electrode body 121 and tabs 122. The tabs 122 include a positive tab and a negative tab. The electrode body 121 is immersed in the liquid electrolyte and includes a positive electrode sheet, a negative electrode sheet, and a separator layer. The separator layer is disposed between the positive electrode sheet and the negative electrode sheet. The material of the separator layer may be polypropylene, polyethylene, etc. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The positive tab is connected to the positive current collector and to the positive electrode post. The negative electrode sheet includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The negative tab is connected to the negative current collector and to the negative electrode post. Taking lithium ions as an example, the materials for the positive electrode current collector and the positive electrode tab can be aluminum, and the materials for the positive electrode active material layer can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, lithium manganese oxide, etc.; the materials for the negative electrode current collector and the negative electrode tab can be copper, and the negative electrode active material can be graphite, silicon, etc.

[0069] Of course, the battery cell 100 provided in this embodiment can also be a solid-state battery, that is, a solid electrolyte, such as sulfide, oxide or polymer electrolyte. Solid electrolyte can replace the separator and liquid electrolyte, and has both ion conduction and isolation functions. The type of battery cell 100 is not specifically limited here.

[0070] To address the aforementioned technical problems, embodiments of this application also provide a battery pack, including the battery cell 100 from any of the above embodiments.

[0071] It is understood that since the battery pack provided in this embodiment has the battery cell 100 in any of the above embodiments, it has all the beneficial effects of the battery cell 100, which will not be described in detail here.

[0072] In the description of this specification, the references to terms such as "some embodiments," "one embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0073] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A battery cell, characterized by, include: Casing (110); End cap (130) is connected to the housing (110); The pole post (150) is inserted through the end cap (130); An electrode assembly (120) is disposed within the housing (110) and electrically connected to the electrode post (150); An insulating component (140) is disposed within the housing (110). The insulating component (140) includes an insulating plate (141) and a first snap-fit ​​portion (142) connected to each other. The insulating plate (141) is located on the side of the end cap (130) near the electrode assembly (120). The end cap (130) is provided with a second snap-fit ​​portion (132) on the side of the end cap (130) near the electrode assembly (120). The first snap-fit ​​portion (142) is located on the side of the insulating plate (141) near the second snap-fit ​​portion (132). The first snap-fit ​​portion (142) snaps into the second snap-fit ​​portion (132).

2. The battery cell of claim 1, wherein, The battery cell has a first direction (Y) and a third direction (Z) that are perpendicular to each other. The second snap-fit ​​portion (132) is a slot (132A). A portion of the slot (132A) is formed by the end cap (130) being recessed along the third direction (Z) in a direction away from the electrode assembly (120). The pole post (150) and the slot (132A) are arranged along the first direction (Y). The first snap-fit ​​portion (142) is located in the slot (132A).

3. The battery cell according to claim 2, characterized in that, The slot (132A) includes a first limiting slot (1321) and a second limiting slot (1322) that are connected to each other. The second limiting slot (1322) is located on the side of the groove wall of the first limiting slot (1321) away from the pole post (150) along the first direction (Y). The first locking part (142) includes a first locking section (1421) and a second locking section (1422). The second locking section (1422) is connected to the side of the first locking section (1421) away from the pole post (150) along the first direction (Y). The first locking section (1421) is located in the first limiting slot (1321), and the second locking section (1422) is located in the second limiting slot (1322).

4. The battery cell according to claim 3, characterized in that, The battery cell has a second direction (X) that is perpendicular to both the first direction (Y) and the third direction (Z). The first latching segment (1421), the second latching segment (1422), the first limiting groove (1321) and the second limiting groove (1322) all extend along the second direction (X).

5. The battery cell according to claim 2, characterized in that, The slot (132A) includes a communicating guide slot (1323) and a limiting slot (1324). The limiting slot (1324) is located between the guide slot (1323) and the insulating plate (141) along the third direction (Z). The first snap-fit ​​part (142) includes a connecting section (1423) and a snap-fit ​​section (1424). The connecting section (1423) is located between the snap-fit ​​section (1424) and the insulating plate (141) along the third direction (Z). The connecting section (1423) is connected to the insulating plate (141) and the snap-fit ​​section (1424) respectively, and passes through the guide slot (1323). The snap-fit ​​section (1424) is located in the limiting slot (1324).

6. The battery cell according to claim 5, characterized in that, The outer periphery of the snap-fit ​​segment (1424) has an annular inclined surface (14241), and the diameter of the snap-fit ​​segment (1424) gradually increases along the third direction (Z) from away from the electrode assembly (120) to near the electrode assembly (120).

7. The battery cell according to any one of claims 1 to 6, characterized in that, The battery cell has a first direction (Y), and there are multiple second snap-fit ​​portions (132), which are arranged along the first direction (Y); there are multiple first snap-fit ​​portions (142), which are arranged along the first direction (Y) and are snap-fitted one-to-one with the multiple second snap-fit ​​portions (132).

8. The battery cell according to any one of claims 1 to 6, characterized in that, The battery cell has a first direction (Y) and a third direction (Z) that are perpendicular to each other. The insulating plate (141) is provided with a first through hole (143) that passes through the third direction (Z). The pole post (150) passes through the first through hole (143). The first snap-fit ​​portion (142) and the first through hole (143) are spaced apart along the first direction (Y).

9. The battery cell according to any one of claims 1 to 6, characterized in that, The first snap-fit ​​portion (142) is integrally formed with the insulating plate (141); and / or, the second snap-fit ​​portion (132) is integrally formed with the end cap (130).

10. A battery pack, characterized in that, Includes the battery cell according to any one of claims 1 to 9.

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