Battery cell and battery pack

Abstract

This application provides a battery cell and a battery pack, relating to the field of battery technology. The battery cell includes: a housing, an electrode assembly disposed within the housing, an end cap connected to the housing, a terminal post partially located on the side of the end cap away from the electrode assembly, a first insulating member disposed within the housing, and a conductive member including a first conductive portion and a second conductive portion. The first insulating member is located on the side of the end cap near the electrode assembly, and a first positioning portion is disposed on the side of the first insulating member near the electrode assembly. The first conductive portion passes through the end cap and is connected to the terminal post. The second conductive portion is located on the side of the first insulating member near the electrode assembly and is connected to the electrode assembly. A second positioning portion is disposed on the side of the second conductive portion away from the electrode assembly, and the second positioning portion is disposed within the first positioning portion. The battery cell provided in this application, through the cooperation of the second positioning portion and the first positioning portion, forms a supporting effect, enhancing the tensile strength of the terminal post, thereby improving the stability of the terminal post on the end cap.

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] Battery cells are an important component of battery packs. Each battery cell typically contains conductive components that connect to the terminals and electrode assemblies, enabling electrical connection between them. However, current terminals have relatively poor tensile strength, resulting in insufficient stability and a tendency to detach from the end caps, thus affecting the lifespan 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 poor tensile strength of the terminals.

[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] Electrode assembly, disposed within the housing;

[0009] End cap, connected to the housing;

[0010] A terminal post, a portion of which is located on the side of the end cap away from the electrode assembly;

[0011] A first insulating member is disposed inside the housing and located on the side of the end cap near the electrode assembly. A first positioning part is provided on the side of the first insulating member near the electrode assembly.

[0012] The conductive component includes a first conductive part and a second conductive part connected to each other. The first conductive part passes through the end cap and is connected to the electrode post. The second conductive part is located on the side of the first insulating component near the electrode assembly and is connected to the electrode assembly. A second positioning part is provided on the side of the second conductive part away from the electrode assembly, and the second positioning part is disposed within the first positioning part.

[0013] In some embodiments of the first aspect, the first positioning portion is a first groove that is recessed in a direction away from the electrode assembly; the second positioning portion is a first protrusion that protrudes in a direction close to the end cap.

[0014] In some embodiments of the first aspect, the end cap is provided with a second groove on the side near the electrode assembly, and the first insulating member is provided with a second protrusion on the side away from the electrode assembly. The second protrusion is disposed in the second groove, and the first positioning portion and the second protrusion are disposed opposite to each other along the thickness direction of the first insulating member.

[0015] In some embodiments of the first aspect, the first insulating member includes a first insulating portion and a second insulating portion connected together. The first insulating portion is located between the end cap and the second conductive portion and is disposed around the first conductive portion. The second insulating portion is disposed around the first insulating portion. The first insulating portion is provided with a first positioning portion on the side of the first insulating portion near the electrode assembly and with a second protrusion on the side of the first insulating portion away from the electrode assembly.

[0016] In some embodiments of the first aspect, the electrode post includes a first electrode post portion and a second electrode post portion connected together, a portion of the first electrode post portion passing through the end cap and connected to the first conductive portion, and the second electrode post portion being located on the side of the first electrode post portion away from the electrode assembly.

[0017] In some embodiments of the first aspect, the battery cell further includes a seal, a mounting groove is provided on the side of the end cap away from the electrode assembly, the seal is located in the mounting groove and surrounds the first conductive portion, and a portion of the first terminal portion is located in the mounting groove and abuts against the side of the seal away from the electrode assembly. In some embodiments of the first aspect, the battery cell further includes a connector and a second insulating member, the second insulating member is disposed around the first terminal portion, the second insulating member includes a third insulating portion, the third insulating portion is connected to the side of the end cap away from the electrode assembly, the connector is connected to the side of the third insulating portion away from the electrode assembly, and is connected to both the first terminal portion and the second terminal portion.

[0018] In some embodiments of the first aspect, the second insulating member further includes a fourth insulating portion located within the mounting groove and abutting against the side of the seal away from the electrode assembly, the third insulating portion being connected to the side of the fourth insulating portion away from the electrode assembly, the fourth insulating portion being disposed around the first electrode post portion and being connected to the first electrode post portion.

[0019] In some embodiments of the first aspect, the second insulating member further includes a fifth insulating portion connected to the side of the third insulating portion away from the electrode assembly and connected to the connector.

[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 a portion of its terminal post located on the side of the end cap away from the electrode assembly. A first insulating member is located on the side of the end cap closer to the electrode assembly, and a first positioning portion is provided on the side of the first insulating member closer to the electrode assembly. A first conductive portion of a conductive member passes through the end cap and is connected to the terminal post. A second conductive portion of the conductive member is located on the side of the first insulating member closer to the electrode assembly and is connected to the electrode assembly. A second positioning portion is provided on the side of the second conductive portion away from the electrode assembly, located within the first positioning portion. The cooperation of the second positioning portion and the first positioning portion forms a supporting effect, enhancing the tensile strength of the terminal post, thereby improving the stability of the terminal post on the end cap and extending the service life 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 A three-dimensional structural schematic diagram of a battery cell is shown in some embodiments of this application;

[0026] Figure 2 It shows Figure 1 A schematic diagram of the decomposed structure;

[0027] Figure 3 It shows Figure 1 A three-dimensional structural diagram of some of the components;

[0028] Figure 4 It shows Figure 3 Schematic diagram of the cross-sectional structure at point AA;

[0029] Figure 5 It shows Figure 4A magnified structural diagram of region B in the middle;

[0030] Figure 6 It shows Figure 3 Decomposition structure diagram Figure 1 ;

[0031] Figure 7 It shows Figure 3 Decomposition structure diagram Figure 2 .

[0032] Explanation of key component symbols:

[0033] 100 - Battery cell; 110 - Housing; 120 - Electrode assembly; 130 - End cap; 131 - Second groove; 132 - Mounting groove; 140 - Terminal post; 141 - First terminal post portion; 142 - Second terminal post portion; 150 - First insulating component; 151 - First positioning portion; 152 - Second protrusion; 153 - First insulating portion; 154 - Second insulating portion; 160 - Conductive component; 161 - First conductive portion; 162 - Second conductive portion; 163 - Second positioning portion; 171 - Sealing component; 172 - Connector; 180 - Second insulating component; 181 - Fourth insulating portion; 182 - Third insulating portion; 183 - Fifth insulating portion; X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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 hierarchy, or implicitly specifying the number of technical features indicated. Therefore, a feature marked "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, the term "multiple" means two or more, unless otherwise explicitly defined.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] The battery cell is a crucial component of the battery pack. Each battery cell typically contains conductive elements that serve as a connection between the terminal block and the electrode assembly. These conductive elements connect to both the terminal block and the electrode assembly, enabling electrical connection between them. However, the current tensile strength of the terminal blocks is relatively poor, resulting in insufficient stability and a tendency for them to detach from the end caps, thus affecting the battery cell's lifespan.

[0042] 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.

[0043] 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.

[0044] like Figure 1 and Figure 2 As shown, the battery cell 100 provided in this embodiment includes: a housing 110, an electrode assembly 120, an end cap 130, a terminal post 140, a first insulating component 150, and a conductive component 160.

[0045] Combination Figures 3 to 5As shown, the electrode assembly 120 is disposed within the housing 110; the end cap 130 is connected to the housing 110; a portion of the electrode post 140 is located on the side of the end cap 130 away from the electrode assembly 120; the first insulating member 150 is disposed within the housing 110 and is located on the side of the end cap 130 near the electrode assembly 120, and a first positioning portion 151 is provided on the side of the first insulating member 150 near the electrode assembly 120; the conductive member 160 includes a first conductive portion 161 and a second conductive portion 162 connected to each other, the first conductive portion 161 passes through the end cap 130 and is connected to the electrode post 140, the second conductive portion 162 is located on the side of the first insulating member 150 near the electrode assembly 120 and is connected to the electrode assembly 120, and a second positioning portion 163 is provided on the side of the second conductive portion 162 away from the electrode assembly 120, and the second positioning portion 163 is disposed within the first positioning portion 151.

[0046] 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. For example, the material of the conductive element 160 and / or the electrode post 140 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 specific limitations.

[0047] It is understood that in the battery cell 100 provided in this embodiment, a portion of the terminal post 140 is located on the side of the end cap 130 away from the electrode assembly 120, and the first insulating member 150 is located on the side of the end cap 130 close to the electrode assembly 120. A first positioning portion 151 is provided on the side of the first insulating member 150 close to the electrode assembly 120. The first conductive portion 161 of the conductive member 160 passes through the end cap 130 and is connected to the terminal post 140. The second conductive portion 162 of the conductive member 160 is located on the side of the first insulating member 150 close to the electrode assembly 120 and is connected to the electrode assembly 120. A second positioning portion 163 is provided on the side of the second conductive portion 162 away from the electrode assembly 120, located within the first positioning portion 151. The second positioning portion 163 is part of the conductive member 160, and the first positioning portion 151 is part of the first insulating member 150.

[0048] The second positioning part 163 and the first positioning part 151 work together to form a support, which enhances the tensile strength of the pole post 140, thereby improving the stability of the pole post 140 on the end cover 130 and extending the service life of the battery cell 100.

[0049] like Figures 2 to 5As shown, in some embodiments, the first positioning part 151 is a first groove, which is recessed in a direction away from the electrode assembly 120; the second positioning part 163 is a first protrusion, which protrudes in a direction close to the end cap 130.

[0050] In some embodiments, the end cap 130 has a second groove 131 on the side near the electrode assembly 120, and the first insulating member 150 has a second protrusion 152 on the side away from the electrode assembly 120. The second protrusion 152 is disposed within the second groove 131, and the first positioning portion 151 and the second protrusion 152 are disposed opposite each other along the thickness direction of the first insulating member 150. The second protrusion 152 and the second groove 131 cooperate to form a further supporting effect, thereby further enhancing the tensile strength of the electrode post 140.

[0051] The second groove 131 is recessed away from the electrode assembly 120, and the second protrusion 152 protrudes towards the end cap 130.

[0052] like Figures 2 to 5 As shown, the first positioning portion 151 is further formed on the side of the second protrusion 152 near the electrode assembly 120, which facilitates processing and manufacturing, thereby reducing manufacturing costs and reducing the weight of the first insulating member 150, thereby helping to improve the energy density of the battery cell 100.

[0053] like Figures 5 to 7 As shown, the first insulating member 150 further includes a first insulating portion 153 and a second insulating portion 154 connected to each other. The first insulating portion 153 is located between the end cap 130 and the second conductive portion 162 and is disposed around the first conductive portion 161. The second insulating portion 154 is disposed around the first insulating portion 153. A first positioning portion 151 is provided on the side of the first insulating portion 153 near the electrode assembly 120, and a second protrusion 152 is provided on the side of the first insulating portion 153 away from the electrode assembly 120.

[0054] Understandably, the first insulating part 153 insulates the conductive element 160 and the end cap 130 from each other, and the second insulating part 154 insulates the electrode assembly 120 and the end cap 130 from each other, thus reducing the risk of short circuits in the battery cell 100. Furthermore, dividing the first insulating part 150 into two parts, the first insulating part 153 and the second insulating part 154, facilitates its installation and reduces installation difficulty.

[0055] like Figures 2 to 5As shown, in some embodiments, the electrode post 140 includes a first electrode post portion 141 and a second electrode post portion 142 connected to each other. A portion of the first electrode post portion 141 passes through the end cap 130 and is connected to the first conductive portion 161 so that the electrode post 140 is electrically connected to the electrode assembly 120. The second electrode post portion 142 is located on the side of the first electrode post portion 141 away from the electrode assembly 120 so that the electrode post 140 is electrically connected to the busbar, thereby facilitating the series or parallel connection of two adjacent battery cells 100 through the busbar.

[0056] It should be noted that when the terminal 140 includes a positive terminal and a negative terminal, either the positive terminal or the negative terminal can adopt the design of the first terminal portion 141 and the second terminal portion 142 described above. That is, the negative terminal and / or the positive terminal includes the first terminal portion 141 and the second terminal portion 142 connected together. No specific limitations are placed on the structure of the terminal 140 here. Furthermore, when the terminal 140 includes a negative terminal, and the negative terminal includes the first terminal portion 141 and the second terminal portion 142 connected together, the material of the first terminal portion 141 can be copper, and the material of the second terminal portion 142 can be aluminum.

[0057] like Figures 2 to 5 As shown, the battery cell 100 further includes a seal 171. The end cap 130 has a mounting groove 132 on the side away from the electrode assembly 120. The seal 171 is located in the mounting groove 132 and is disposed around the first conductive part 161. A portion of the first electrode post 141 is located in the mounting groove 132 and abuts against the side of the seal 171 away from the electrode assembly 120.

[0058] For example, the material of the seal 171 can be nitrile rubber, fluororubber, silicone rubber, ethylene propylene rubber, polytetrafluoroethylene, polyurethane, natural rubber, etc., without specific limitations.

[0059] It is understandable that by setting the seal 171, the gap formed by the end cap 130, the first pole portion 141 and the first conductive portion 161 can be sealed to achieve a sealing effect; by setting the mounting groove 132, the installation of the seal 171 is facilitated and the movement of the seal 171 relative to the end cap 130 can be restricted, thereby improving the stability of the seal 171.

[0060] like Figures 2 to 5 As shown, the battery cell 100 further includes a connector 172 and a second insulating member 180. The second insulating member 180 is disposed around the first terminal portion 141. The second insulating member 180 includes a third insulating portion 182. The third insulating portion 182 is connected to the side of the end cap 130 away from the electrode assembly 120. The connector 172 is connected to the side of the third insulating portion 182 away from the electrode assembly 120 and is connected to the first terminal portion 141 and the second terminal portion 142 respectively.

[0061] Understandably, the third insulating part 182 enables insulation between the terminal post 140 and the end cap 130, thereby reducing the risk of short circuit in the battery cell 100. The connector 172 is connected to the side of the third insulating part 182 away from the electrode assembly 120, and is also connected to the first terminal post 141 and the second terminal post 142 respectively. This further enhances the tensile strength of the terminal post 140, thereby further improving the stability of the terminal post 140 on the end cap 130.

[0062] For example, the connection between the connector 172 and the first pole piece 141, and / or the connection between the connector 172 and the second pole piece 142, can be welding, bonding, snap-fitting, screw connection, etc., without specific limitations. It should be noted that when the connector 172 is welded to the second pole piece 142, the connector 172 and the second pole piece 142 can be made of the same conductive metal material, thereby reducing the difficulty of welding.

[0063] like Figures 2 to 5 As shown, the second insulating member 180 further includes a fourth insulating portion 181, which is located in the mounting groove 132 and abuts against the side of the sealing member 171 away from the electrode assembly 120. The third insulating portion 182 is connected to the side of the fourth insulating portion 181 away from the electrode assembly 120. The fourth insulating portion 181 is disposed around the first pole post portion 141 and is connected to the first pole post portion 141.

[0064] Understandably, by providing the fourth insulating part 181, mutual insulation between the end cap 130 and the terminal post 140 can be further achieved, thereby further reducing the risk of short circuit in the battery cell 100.

[0065] like Figures 2 to 5 As shown, the second insulating member 180 further includes a fifth insulating part 183, which is connected to the side of the third insulating part 182 away from the electrode assembly 120 and connected to the connector 172. This increases the contact area between the second insulating member 180 and the connector 172, making the connection between the two more reliable.

[0066] It should be noted that "the second insulating part 180 is arranged around the first pole post 141" can be understood as: the third insulating part 182, the fourth insulating part 181 and the fifth insulating part 183 are all arranged around the first pole post 141.

[0067] For example, the materials of the first insulating element 150 and / or the second insulating element 180 may be selected from the following categories: 1. Synthetic organic insulating materials: plastics (e.g., polyethylene, polyvinyl chloride, polypropylene, polytetrafluoroethylene, epoxy resin, etc.), synthetic rubbers (e.g., silicone rubber, nitrile rubber, etc.), synthetic fibers (e.g., 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.

[0068] 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.

[0069] 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 140 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 and electrode tabs, the electrode tabs including a positive electrode tab and a negative electrode tab. The electrode body 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 can 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 electrode 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 electrode 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.

[0070] 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.

[0071] It should be noted that when the battery cell 100 has two mutually perpendicular directions X, Y, and Z (the third direction Z is the thickness direction of the first insulating member 150), the end cap 130 is located on the side of the housing 110 along the third direction Z, a portion of the electrode post 140 is located on the side of the end cap 130 away from the electrode assembly 120 along the third direction Z, the first insulating member 150 is located on the side of the end cap 130 close to the electrode assembly 120 along the third direction Z, a first positioning part 151 is provided on the side of the first insulating member 150 close to the electrode assembly 120 along the third direction Z, a second conductive part 162 is located on the side of the first insulating member 150 close to the electrode assembly 120, and a second positioning part 163 is provided on the side of the second conductive part 162 away from the electrode assembly 120 along the third direction Z. When there are multiple electrode assemblies 120, the multiple electrode assemblies 120 are arranged along the second direction Y; when the electrode post 140 includes a positive electrode post and a negative electrode post, the positive electrode post and the negative electrode post are spaced apart along the first direction X.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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 in that, include: Casing (110); An electrode assembly (120) is disposed within the housing (110); End cap (130) is connected to the housing (110); A terminal post (140), a portion of which is located on the side of the end cap (130) away from the electrode assembly (120); A first insulating member (150) is disposed inside the housing (110) and located on the side of the end cap (130) near the electrode assembly (120). A first positioning part (151) is provided on the side of the first insulating member (150) near the electrode assembly (120). The conductive element (160) includes a first conductive part (161) and a second conductive part (162) connected to each other. The first conductive part (161) passes through the end cap (130) and is connected to the pole post (140). The second conductive part (162) is located on the side of the first insulating element (150) close to the electrode assembly (120) and is connected to the electrode assembly (120). A second positioning part (163) is provided on the side of the second conductive part (162) away from the electrode assembly (120). The second positioning part (163) is disposed in the first positioning part (151).

2. The battery cell according to claim 1, characterized in that, The first positioning part (151) is a first groove, which is recessed in a direction away from the electrode assembly (120); the second positioning part (163) is a first protrusion, which protrudes in a direction close to the end cap (130).

3. The battery cell according to claim 2, characterized in that, The end cap (130) has a second groove (131) on the side near the electrode assembly (120), and the first insulating member (150) has a second protrusion (152) on the side away from the electrode assembly (120). The second protrusion (152) is disposed in the second groove (131), and the first positioning part (151) and the second protrusion (152) are disposed opposite to each other along the thickness direction of the first insulating member (150).

4. The battery cell according to claim 3, characterized in that, The first insulating member (150) includes a first insulating part (153) and a second insulating part (154) connected to each other. The first insulating part (153) is located between the end cap (130) and the second conductive part (162) and is disposed around the first conductive part (161). The second insulating part (154) is disposed around the first insulating part (153). The first insulating part (153) has a first positioning part (151) on the side near the electrode assembly (120) and a second protrusion (152) on the side away from the electrode assembly (120).

5. The battery cell according to claim 1, characterized in that, The electrode post (140) includes a first electrode post portion (141) and a second electrode post portion (142) connected to each other. A portion of the first electrode post portion (141) passes through the end cap (130) and is connected to the first conductive portion (161). The second electrode post portion (142) is located on the side of the first electrode post portion (141) away from the electrode assembly (120).

6. The battery cell according to claim 5, characterized in that, The battery cell also includes a seal (171). The end cap (130) has a mounting groove (132) on the side away from the electrode assembly (120). The seal (171) is located in the mounting groove (132) and surrounds the first conductive part (161). A portion of the first electrode post (141) is located in the mounting groove (132) and abuts against the side of the seal (171) away from the electrode assembly (120).

7. The battery cell according to claim 6, characterized in that, The battery cell further includes a connector (172) and a second insulating member (180). The second insulating member (180) is disposed around the first electrode post (141). The second insulating member (180) includes a third insulating part (182). The third insulating part (182) is connected to the side of the end cap (130) away from the electrode assembly (120). The connector (172) is connected to the side of the third insulating part (182) away from the electrode assembly (120). The connector (172) is connected to the first electrode post (141) and the second electrode post (142) respectively.

8. The battery cell according to claim 7, characterized in that, The second insulating member (180) further includes a fourth insulating portion (181) located in the mounting groove (132) and abutting against the side of the seal (171) away from the electrode assembly (120). The third insulating portion (182) is connected to the side of the fourth insulating portion (181) away from the electrode assembly (120). The fourth insulating portion (181) is disposed around the first pole post (141) and is connected to the first pole post (141).

9. The battery cell according to claim 8, characterized in that, The second insulating member (180) further includes a fifth insulating portion (183), which is connected to the side of the third insulating portion (182) away from the electrode assembly (120) and is connected to the connector (172).

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

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