Battery cell, battery device, and electric device

Abstract

A battery cell, a battery device, and an electric device. The battery cell comprises: a housing component, comprising a first housing wall; an electrode component arranged in the housing component; and a terminal post component, comprising a clamping assembly and a terminal post body, wherein one end of the clamping assembly is connected to the first housing wall, the other end clamps the terminal post body, and the terminal post body is electrically connected to the electrode component. The clamping assembly comprises a bent clamping member and a flat support member which are connected to each other, wherein the bent clamping member and the flat support member simultaneously clamp two circumferential sides of the terminal post body, and the bent clamping member is arranged on the side of the flat support member away from the electrode component and is directly integrally connected to the first housing wall.

Description

Battery cells, battery packs and electrical devices

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202510104023.5, filed on January 22, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and in particular to a battery cell, a battery device, and an electrical device. Background Technology

[0004] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, battery devices, as the power source, play an irreplaceable and crucial role. Typically, a battery device consists of a casing and multiple battery cells housed within it. Currently, the reliability of individual battery cells needs further improvement. Summary of the Invention

[0005] This application provides a battery cell, a battery device, and an electrical device, which can effectively improve the reliability of the battery cell and the battery device.

[0006] In a first aspect, embodiments of this application provide a battery cell, comprising: a housing component including a first housing wall; an electrode component disposed within the housing component; and a terminal component including a clamping assembly and a terminal body, one end of the clamping assembly being connected to the first housing wall and the other end clamping the terminal body; the terminal body being electrically connected to the electrode component; wherein the clamping assembly includes a bent clamping member and a straight support member connected together, the bent clamping member and the straight support member simultaneously clamping both sides of the terminal body in the circumferential direction, and the bent clamping member being disposed on the side of the straight support member away from the electrode component, and being directly connected to the first housing wall as an integral part.

[0007] In the above technical solution, by configuring the terminal post component as a clamping assembly and a terminal post body, the clamping assembly, composed of a bent clamping member and a straight support member, can clamp the terminal post body while facilitating splicing and assembly, reducing processing difficulty and improving manufacturability. Furthermore, since the straight support member is located inside the housing component relative to the bent clamping member, when the terminal post body is subjected to an outward pull-out force, the transmission path of the pull-out force does not pass through the connection point between the straight support member and the bent clamping member. This helps reduce the risk of weak points in the clamping assembly when the terminal post body is subjected to pull-out force, improving the installation reliability between the terminal post body and the clamping assembly, reducing the probability of the terminal post body detaching from the first housing wall under force, and thus improving the reliability of the terminal post component, which in turn improves the reliability of the battery cell.

[0008] In some embodiments of this application, the first shell wall is provided with a first through hole, the bending clamping member includes a connected main body and a bending part, the main body is installed in the first through hole and is provided with a second through hole, the bending part is provided on the side of the main body located outside the shell component, the pole post body passes through the second through hole, and the straight support member is connected to the main body.

[0009] The above technical solution provides a design structure for the bending clamp, where the main body of the bending clamp can be connected to the first through hole in an interlocking manner, improving the installation reliability of the bending clamp and the first shell wall. The electrode body passes through the second through hole, also achieving an interlocking fit, improving the connection reliability between the electrode body and the main body. The straight support member is connected to the main body, enabling the straight support member and the bending part to cooperate and clamp the electrode body, improving the installation reliability of the electrode body, thereby improving the reliability of the battery cell.

[0010] In some embodiments of this application, the bending portion includes a connected upright arm portion and a cantilever portion, the upright arm portion being connected to the main body portion, the cantilever portion being connected to the upright arm portion, and the cantilever portion being set at an angle to the upright arm portion.

[0011] In the above technical solution, the bending part with the above structure can make the distance between the connection position of the main body and the straight support member and the cantilever part relatively close. This makes the length of the constraint arm formed on the bending clamp member relatively small. The electrode body needs to be subjected to a larger pull-out force to cause the connection position of the main body and the straight support member to break. This can reduce the risk of the electrode body coming off due to deformation between the main body and the straight support member, improve the reliability of the electrode component, and thus improve the reliability of the battery cell.

[0012] In some embodiments of this application, in the arm thickness direction of the upright arm, the projected size of the upright arm on the first shell wall is smaller than the projected size of the cantilever arm on the first shell wall.

[0013] In the above technical solution, the upright arm and the cantilever arm are constructed in the aforementioned relationship, which helps to make the connection position between the main body and the straight support member and the cantilever arm as close as possible. This helps to reduce the length of the constraint arm formed on the bending clamp, and further reduces the effect of deformation between the main body and the straight support member that could cause the electrode body to come out. This also improves the reliability of the electrode component and the reliability of the battery cell.

[0014] In some embodiments of this application, the upright arm is perpendicular to the main body. In this technical solution, by adopting the above structure, the distance between the connection point of the main body and the straight support member and the cantilever portion can be made closer, resulting in a better reduction in the length of the constraint arm formed on the bending clamping member. The risk of the electrode post body detaching from the clamping assembly is also lower, further improving the reliability of the electrode post component and the reliability of the battery cell.

[0015] In some embodiments of this application, the cantilever portion is parallel to the main body portion. In this technical solution, by having the cantilever portion parallel to the main body portion, it is beneficial for the cantilever portion to apply a vertical constraint force to the electrode body, thus providing a stronger constraint effect on the electrode body. This enhances the connection stability between the bending clamp and the electrode body, further reducing the risk of the electrode body detaching from the clamping assembly, improving the reliability of the electrode component, and consequently improving the reliability of the battery cell.

[0016] In some embodiments of this application, the flat support member and the main body are welded together and have weld marks, and the projection of the weld marks on the first shell wall and the projection of the upright arm on the first shell wall at least partially overlap.

[0017] In the above technical solution, the structure allows the distance between the solder mark and the cantilever to be relatively short, thereby reducing the length of the constraint arm formed on the bending clamp. The electrode body is less likely to come out between the bending clamp and the straight support, which can improve the installation stability of the electrode component and thus improve the reliability of the battery cell.

[0018] In some embodiments of this application, the mid-section of the upright arm is equally divided along its thickness direction, and the solder mark is applied to the side of the mid-section away from the pole body. In this technical solution, the above approach allows for a smaller constraint arm length formed on the bending clamp, while also ensuring that the support area between the straight support member and the main body has a suitable length along the thickness direction of the upright arm. This improves the connection reliability between the straight support member and the main body, thereby enhancing the reliability of the pole component.

[0019] In some embodiments of this application, the support arm includes a connected support arm body and a support arm root. The support arm body is connected to the cantilever arm, and the support arm root is connected to the main body. The side of the support arm root away from the pole body protrudes relative to the support arm body.

[0020] In the above technical solution, the thickness of the support arm root is relatively large compared to the support arm body. This improves the strength and rigidity of the support arm root, reduces the risk of breakage or damage at the connection between the support arm and the body, and helps improve the overall reliability of the bending clamp. Furthermore, the increased thickness area at the support arm root is located on the side of the support arm root away from the electrode post body. When the body and straight support are welded, the risk of the molten pool forming during welding burning through the support arm root is reduced, improving the reliability of the support arm, and consequently improving the installation reliability of the electrode post component, which in turn improves the reliability of the battery cell.

[0021] In some embodiments of this application, the flat support member and the main body are welded together and have a weld mark. The outer contour of the weld mark projected on the first shell wall is located outside the outer contour of the projection of the upright arm on the first shell wall and is adjacent to the outer contour of the projection of the upright arm on the first shell wall.

[0022] In the above technical solution, the length of the support area between the straight support member and the main body can be further increased, the connection strength between the straight support member and the main body can be enhanced, and the length of the constraint arm formed on the bending clamp member can be relatively small. That is, a good balance is achieved between the length of the constraint arm and the length of the support area, which is conducive to improving the overall reliability of the pole component.

[0023] In some embodiments of this application, the bending clamp and the straight support are welded together and have weld marks. The bending clamp is provided with a first guide portion, and the straight support is provided with a second guide portion. The second guide portion and the first guide portion cooperate with each other, and a weld mark is formed between the second guide portion and the first guide portion.

[0024] In the above technical solution, by cooperating with the first guide part of the bending clamp and the second guide part of the straight support, the assembly difficulty between the bending clamp and the straight support can be reduced, and the installation accuracy between the bending clamp and the straight support can be improved, thereby improving the connection reliability between the bending clamp and the straight support, and thus improving the overall reliability of the pole component.

[0025] In some embodiments of this application, the first guide portion and the second guide portion are constructed as a stepped structure and have at least one stepped surface. In this technical solution, the first guide portion and the second guide portion with the above structure not only play a guiding role, facilitating the assembly of the bending clamp and the straight support, but also play a positioning role, which can further improve the installation accuracy of the bending clamp and the straight support, improve the connection reliability of the bending clamp and the straight support, and thus improve the reliability of the electrode component, which in turn improves the reliability of the battery cell.

[0026] In some embodiments of this application, the first guide portion and the second guide portion are configured as inclined surfaces.

[0027] In the above technical solution, the first and second guide portions are inclined surfaces, which have a relatively simple structure, good manufacturability, and are conducive to cost reduction. Moreover, since the solder mark is formed on the second and first guide portions, the surface of the inclined surfaces is relatively regular, which facilitates the adjustment of the welding point position. The welding point can meet the welding requirements at both the center and bottom positions of the inclined surfaces. That is, the inclined surfaces of the first and second guide portions provide greater tolerance for the welding position, making welding easier, improving welding quality, and enhancing the connection reliability of the bending clamp and the straight support, thereby improving the reliability of the electrode post component and the battery cell.

[0028] In some embodiments of this application, the bending clamp has an inner end face located inside the housing component, and the angle between the inclined surface formed by the first guide portion and the inner end face is α, wherein 91 degrees ≤ α ≤ 120 degrees. In this technical solution, by setting the angle between the inclined surface formed by the first guide portion and the inner end face within the above range, the angle can be made within a suitable range, thus providing better guiding and positioning effects.

[0029] In some embodiments of this application, the pole component includes an insulating and sealing structure, and the pole body is insulated from and sealed to the bending clamp and the straight support through the insulating and sealing structure.

[0030] In the above technical solution, the insulation and sealing structure can achieve insulation and sealing between the terminal body and the clamping assembly, reducing the leakage of electrolyte inside the housing component from between the terminal body and the clamping assembly. It can also reduce the risk of moisture, dust and other particulate matter from the external environment entering the housing component from between the terminal body and the clamping assembly, and reduce the probability of short circuit between the terminal body and the clamping assembly, thereby improving the reliability of the battery cell.

[0031] In some embodiments of this application, the insulating sealing structure includes an outer insulating member disposed on the outer side of the bending clamp member away from the pole body, and the outer contour of the projection of the first guide portion and the second guide portion on the first shell wall is located within the outer contour of the projection of the outer insulating member on the first shell wall.

[0032] In the above technical solution, the external insulation component provides insulation on the outside of the bending clamp, reducing the probability of short circuits between the bending clamp and other external conductive components. Furthermore, the external insulation component also provides protection by sealing the gap between the bending clamp and the terminal body, reducing the risk of external moisture, dust, and other particles entering the terminal and housing components through the gap. It also reduces damage to the bending clamp from mechanical impacts, thereby improving the reliability of the terminal component and consequently, the reliability of the battery cell. Moreover, this structure allows for a more compact overall structure of the terminal component, reducing its size, lowering costs, and facilitating the miniaturization of the battery cell.

[0033] In some embodiments of this application, the insulating sealing structure includes an outer insulating member disposed on the outer side of the bending clamp member away from the pole body. The outer contours of the projections of the first guide portion and the second guide portion on the first shell wall are located outside the outer contours of the projections of the outer insulating member on the first shell wall and close to the outer contours of the projections of the outer insulating member on the first shell wall.

[0034] In the above technical solution, the outer contour of the projection of the first guide part and the second guide part on the first shell wall can also be located outside the outer contour of the projection of the outer insulating part on the first shell wall and close to the outer contour of the projection of the outer insulating part on the first shell wall. In this solution, the overall structure of the electrode component can be relatively compact, which is also conducive to reducing the size of the electrode component, reducing costs, and realizing the miniaturization design of the battery cell.

[0035] In some embodiments of this application, the bending clamp has a first peripheral side near the first shell wall, and the straight support has a second peripheral side near the first shell wall, with a solder mark formed between the second peripheral side and the first peripheral side.

[0036] In the above technical solution, the welding of the bending clamp and the straight support occurs on the first and second circumferential sides. This method can increase the distance between the welding position and the root of the vertical arm in the bending clamp, which can reduce the risk of burning through the root of the vertical arm during the welding process, improve the reliability of the clamping assembly, and thus improve the reliability of the pole post component and the battery cell.

[0037] In some embodiments of this application, the pole component includes an insulating sealing structure, which includes an outer insulating member. The outer insulating member is disposed on the outer side of the bending clamping member away from the pole body. The outer contour of the projection of the weld mark on the first shell wall is located outside and away from the outer contour of the projection of the outer insulating member on the first shell wall. In this technical solution, the above solution can reduce the risk of burning through the outer insulating member during the welding process of forming the weld mark by welding the bending clamping member and the straight support member, which is beneficial to ensuring the insulation of the outer side of the bending clamping member, thereby improving the reliability of the pole component.

[0038] In some embodiments of this application, the terminal post component includes an insulating and sealing structure, which includes a sealing element disposed between the terminal post body and the straight support component. In this technical solution, by providing a sealing element, the sealing performance between the terminal post body and the straight support component can be improved, reducing the risk of electrolyte leakage inside the casing component and reducing the probability of external moisture, dust, and other particulate matter entering the casing component, thereby improving the reliability of the battery cell.

[0039] In some embodiments of this application, the pole body includes a connected body portion and a protrusion, the protrusion being circumferentially arranged around the body portion; the straight support member has an inner circumferential surface near the body portion and an outer surface near the protrusion; the sealing member includes a connected first sealing portion and a second sealing portion, the first sealing portion being sealed between the body portion and the inner circumferential surface, and the second sealing portion being disposed between the protrusion and the outer surface.

[0040] In the above technical solution, the first sealing part is sealed between the body part and the inner circumferential surface, and the second sealing part is sealed between the protrusion and the outer surface. The sealing component with this structure has a relatively complex sealing path and a relatively large sealing interface, which can enhance the sealing performance between the electrode body and the straight support component, thereby improving the overall sealing performance of the electrode component and improving the reliability of the battery cell.

[0041] In some embodiments of this application, one of the flat support member and the seal member has a protrusion, and the other has a recess, with the recess engaging and connecting with the protrusion. In the above technical solution, the flat support member and the seal member can be positioned and installed through the engagement of the protrusion and the recess, which is beneficial for the pre-assembly positioning of the flat support member and the seal member, and can improve the installation stability and reliability of the seal member on the flat support member.

[0042] In some embodiments of this application, the insulating sealing structure includes an inner insulating member, which is insulated between the bending clamp and the terminal body. In this technical solution, by providing the inner insulating member, an insulating connection can be achieved between the bending clamp and the terminal body, reducing the risk of short circuits between them. Furthermore, it provides a certain degree of sealing between the bending clamp and the terminal body, enhancing the sealing performance and thereby improving the reliability of the terminal component, and consequently, the reliability of the battery cell.

[0043] In some embodiments of this application, a gap is provided between the inner insulating component and the sealing component. In this technical solution, the inner insulating component and the sealing component may not be connected, and a gap is maintained between them. This gap provides expansion space for the compression deformation of the sealing component, thereby releasing the expansion force of the sealing component deformation, which is beneficial to improving the reliability of the sealing component.

[0044] In some embodiments of this application, the inner insulating element and the sealing element are abutting or connected to each other. In this technical solution, regardless of whether the inner insulating element and the sealing element are abutting or connected, the inner insulating element and the sealing element can jointly form a continuous insulation and sealing barrier and have a larger insulation and sealing boundary, which can enhance insulation and sealing performance, thereby improving the reliability of the terminal component, and thus improving the reliability of the battery cell.

[0045] In some embodiments of this application, when the inner insulating component and the sealing component are connected, the inner insulating component and the sealing component are integrally molded. In this technical solution, the integrally molded structural design helps to reduce the number of parts, thereby reducing assembly steps, simplifying the production process, and reducing manufacturing costs.

[0046] In some embodiments of this application, the insulating sealing structure includes an outer insulating member disposed on the outer side of the bending clamp member away from the electrode body and connected to the inner insulating member. In this technical solution, the outer insulating member and the inner insulating member are connected, thereby forming a continuous insulating barrier and increasing the insulating boundary, which can enhance the insulation performance between the electrode body and the bending clamp member, thereby improving the reliability of the electrode component and thus improving the reliability of the battery cell.

[0047] In some embodiments of this application, the outer insulation component and the inner insulation component are integrally molded parts. This integrally molded structural design helps reduce the number of parts, thereby reducing assembly steps, simplifying the production process, and lowering manufacturing costs.

[0048] In some embodiments of this application, the bending clamping member is arranged circumferentially around the pole body, and / or, the straight support member is arranged circumferentially around the pole body. In the above technical solutions, the bending clamping member and the straight support member are annular structural members, which can better surround the pole body, thereby enhancing the clamping effect on the pole body and improving the installation stability and reliability of the pole body in the clamping assembly.

[0049] In some embodiments of this application, the size of the main body portion is H1 in the direction from the inside to the outside of the second through hole, wherein 1.5mm≤H1≤5mm.

[0050] In the above technical solution, by setting the dimensions of the main body in the direction from the inside to the outside of the second through hole within the above range, the main body can have a suitable strength, and it is not easy to weld through the main body when it is welded to the straight support member. It can also make the main body have a suitable weight, which is beneficial to make the battery cell have a larger energy density.

[0051] Secondly, embodiments of this application provide a battery cell, including: a housing component, including a first housing wall; an electrode component, the electrode component being disposed within the housing component; and a terminal component, including a terminal body and a straight support member, the terminal body being electrically connected to the electrode component; wherein, the first housing wall is provided with a bending clamping member, and the bending clamping member is connected to the first housing wall as an integral part, the bending clamping member and the straight support member simultaneously clamping both sides of the terminal body in the circumferential direction, and the bending clamping member is disposed on the side of the straight support member away from the electrode component, and is directly connected to the first housing wall as an integral part.

[0052] In the above technical solutions, under the premise that the electrode body is not easily detached from the clamping assembly and the electrode component as a whole has good reliability, more options can be provided for the design of battery cells to meet different requirements.

[0053] Thirdly, embodiments of this application provide a battery device including a single battery cell as described above.

[0054] In the above technical solution, since the battery cell has high reliability, the battery device using the battery cell can have good reliability.

[0055] Fourthly, embodiments of this application provide an electrical device, including a single battery cell as described above, or a battery device as described above.

[0056] In the above technical solution, since the battery cell or battery device has high reliability, it is beneficial to improve the reliability of the electrical device that uses the battery cell or battery device. Attached Figure Description

[0057] 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.

[0058] Figure 1 is a schematic diagram of the structure of an electrical device provided in some embodiments of this application as a vehicle;

[0059] Figure 2 is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0060] Figure 3 is a schematic diagram of the internal structure of a battery cell provided in some embodiments of this application;

[0061] Figure 4 is a schematic diagram of the structure of the pole post component provided in some embodiments of this application;

[0062] Figure 5 is a magnified view of part V in Figure 4;

[0063] Figure 6 is a structural schematic diagram of a pole post component provided in another embodiment of this application;

[0064] Figure 7 is a structural schematic diagram of the pole post component provided in another embodiment of this application;

[0065] Figure 8 is a flowchart illustrating the assembly of pole post components provided in some embodiments of this application;

[0066] Figure 9 is a schematic diagram of the assembly process of a battery cell provided in some embodiments of this application.

[0067] icon:

[0068] 1000. Electrical appliances;

[0069] 100. Battery device;

[0070] 10. Box body; 11. First box body; 12. Second box body;

[0071] 20. Battery cell;

[0072] 21. Housing components;

[0073] 2101, First shell wall; 2102, First through hole;

[0074] 22. Electrode components; 221. Electrode tabs;

[0075] 23. Pole post components;

[0076] 231. Clamping assembly;

[0077] 2311, Bending clamp; 2311a, Inner end face; 2311b, First circumferential side; 2011, Main body; 2011a, Second through hole; 2012, Bending part; 20121, Vertical arm part; 2021, Vertical arm main body; 2022, Vertical arm root; 20122, Cantilever part; 203, Weld mark; 204, Center dividing surface; 2051, First guide part; 2052, Second guide part; 2301, Restraining arm;

[0078] 2312, Straight support component; 2312a, Second circumferential side surface; 2312b, Inner circumferential surface; 2312c, Outer surface;

[0079] 232. Pole body;

[0080] 2321. Main body; 2322. Protrusion;

[0081] 233. Insulating and sealing structure;

[0082] 2331. External insulation components;

[0083] 2332, Seal; 2061, First sealing part; 2062, Second sealing part;

[0084] 2333, Internal insulation components;

[0085] 2072. Concave part; 2071. Concave part; 208. Gap;

[0086] 200, controller; 300, motor; X, first direction; Z, third direction. Detailed Implementation

[0087] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0088] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0089] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0090] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication 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.

[0091] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0092] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0093] In this application, "multiple" means two or more (including two).

[0094] In this application, the battery cell may include lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., and the embodiments of this application are not limited to these. The battery cell may be cylindrical, flat, cuboid, or other shapes, and the embodiments of this application are not limited to these. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these.

[0095] The battery apparatus mentioned in the embodiments of this application can refer to an assembly of one or more battery cells for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar. In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0096] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0097] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing. As an example, the individual battery cell assembly may be a battery module, which can be housed within the housing by securing the battery module to the housing. Alternatively, the individual battery cell assembly may be housed within the housing by directly securing multiple individual battery cells to the housing. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the individual battery cells.

[0098] A single battery cell includes a casing, electrode assembly, and electrolyte. The casing houses the electrode assembly and electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode plates. The positive electrode 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, while the uncoated positive current collector protrudes beyond the coated one, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode 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, and the negative current collector without the negative active material layer protrudes from the one with the negative active material layer. The negative current collector without the negative active material layer serves as the negative electrode tab. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0099] The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0100] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, battery devices, as the power source, play an irreplaceable and crucial role. Typically, a battery device consists of a casing and multiple battery cells housed within it. Currently, the reliability of individual battery cells needs further improvement.

[0101] In a typical battery cell, the terminal assembly usually consists of a terminal body, which is mounted to the casing via riveting, welding, or other methods. However, as the battery cell operates under prolonged charging and discharging, the internal gas pressure increases, creating an outward pulling force on the terminal body, posing a risk of the terminal body detaching from the casing. Secondly, the terminal body is usually welded to external conductive components (such as electrodes). During use, the terminal body is also subjected to outward pulling forces under the influence of these conductive components, again posing a risk of detachment from the casing. In other words, during use, the battery cell's terminal body is at risk of detaching from the casing due to significant stress, thus affecting the battery cell's reliability.

[0102] Based on the above considerations, in order to address the risk that the terminal body of a battery cell may detach from the outer casing due to excessive force, thereby affecting the reliability of the battery cell, the applicant has designed a battery cell comprising: a housing component, an electrode component, and a terminal component. The housing component includes a first housing wall; the electrode component is disposed within the housing component; the terminal component includes a clamping assembly and a terminal body, one end of the clamping assembly is connected to the first housing wall, and the other end clamps the terminal body; the terminal body is electrically connected to the electrode component; wherein, the clamping assembly includes a bent clamping member and a straight support member connected together, the bent clamping member and the straight support member simultaneously clamping both sides of the terminal body in the circumferential direction, and the bent clamping member is disposed on the side of the straight support member away from the electrode component, and is directly connected to the first housing wall as a single piece.

[0103] In this type of battery cell structure, by configuring the terminal post component as a clamping assembly and the terminal post body, the clamping assembly, composed of a bent clamping member and a straight support member, can easily assemble the terminal post body while clamping it, reducing processing difficulty and improving manufacturability. Furthermore, since the straight support member is located inside the housing component relative to the bent clamping member, when the terminal post body is subjected to an outward pull-out force, the transmission path of the pull-out force does not pass through the connection point between the straight support member and the bent clamping member. This helps reduce the risk of weak points in the clamping assembly when the terminal post body is subjected to pull-out forces, improving the installation reliability between the terminal post body and the clamping assembly, reducing the probability of the terminal post body detaching from the first housing wall under force, and thus improving the reliability of the terminal post component, which in turn improves the reliability of the battery cell.

[0104] The battery cells or battery devices disclosed in this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system comprising the battery cells and battery devices disclosed in this application can be used to construct such an electrical device, thus expanding the applicability of the battery cells and battery devices.

[0105] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0106] For ease of explanation, the following embodiments use a vehicle as an example of an electrical device 1000 according to one embodiment of this application. Please refer to Figure 1, which is a structural schematic diagram of a vehicle provided in some embodiments of this application for the electrical device 1000. The vehicle can be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is provided inside the vehicle, and the battery device 100 can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source. The vehicle may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle during starting, navigation, and driving.

[0107] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0108] Please refer to Figure 2, which is an exploded view of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and a plurality of battery cells 20, which are housed within the housing 10. The housing 10 provides assembly space for the battery cells 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first housing body 11 and a second housing body 12, which cover each other, and the first housing body 11 and the second housing body 12 together define an assembly space for accommodating the battery cells 20. The second housing body 12 may be a hollow structure open at one end, and the first housing body 11 may be a plate-like structure, with the first housing body 11 covering the open side of the second housing body 12 so that the first housing body 11 and the second housing body 12 together define the assembly space; the first housing body 11 and the second housing body 12 may also be hollow structures both open on one side, with the open side of the first housing body 11 covering the open side of the second housing body 12. Of course, the box 10 formed by the first box body 11 and the second box body 12 can be of various shapes, such as cylinder, cuboid, etc.

[0109] In the battery device 100, multiple battery cells 20 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0110] Please refer to Figure 2, which is an exploded view of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes multiple rows of battery cells 20, which are arranged along the length of the housing 10. Each row of battery cells 20 includes multiple battery cells 20 arranged along the width of the housing 10; or, the multiple rows of battery cells 20 are arranged along the width of the housing 10, and each row of battery cells 20 includes multiple battery cells 20 arranged along the length of the housing 10.

[0111] Each battery cell 20 can be a secondary battery or a primary battery. A secondary battery refers to a battery cell 20 that can be recharged after discharge to activate the active materials and continue to be used. It can also be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application embodiment is not limited in this regard. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes. For example, in Figure 2, the battery cell 20 is cuboid.

[0112] Referring to Figure 3, this embodiment of the application provides a battery cell 20, including: a housing component 21, an electrode component 22, and a terminal post component 23. The housing component 21 includes a first housing wall 2101; the electrode component 22 is disposed inside the housing component 21; the terminal post component 23 includes a clamping assembly 231 and a terminal post body 232. One end of the clamping assembly 231 is connected to the first housing wall 2101, and the other end clamps the terminal post body 232; the terminal post body 232 is electrically connected to the electrode component 22; wherein, the clamping assembly 231 includes a bent clamping member 2311 and a straight support member 2312 connected together. The bent clamping member 2311 and the straight support member 2312 simultaneously clamp the two sides of the terminal post body 232 in the circumferential direction, and the bent clamping member 2311 is disposed on the side of the straight support member 2312 away from the electrode component 22, and is directly connected to the first housing wall 2101 as an integral part.

[0113] The housing component 21 can refer to a structure used to house and protect the internal components of the battery cell 20. The shape of the housing component 21 can be, but is not limited to, a cuboid, a cube, a cylinder, etc., and the material can be, but is not limited to, metal materials (such as aluminum, stainless steel, etc.), plastic materials (such as polypropylene, polyamide, polyphenylene sulfide, etc.), composite materials (such as carbon fiber reinforced composite materials, aluminum-plastic film, etc.), or other materials resistant to electrolyte corrosion, etc.

[0114] The first shell wall 2101 can refer to one of a plurality of shell walls that enclose the shell component 21. For example, the shell component 21 can have a first direction X, a second direction, and a third direction Z, wherein the second direction can refer to a direction perpendicular to the first direction X and the third direction Z. For example, the first direction X is the length direction of the battery cell 20, the second direction is the width direction of the battery cell 20, and the third direction Z is the height direction of the battery cell 20. The first shell wall 2101 can refer to the shell wall at one or both ends of at least one of the first direction X, the second direction, and the third direction Z of the shell component 21. For example, referring to FIG3, the first shell wall 2101 can be the shell wall at one end of the shell component 21 in the third direction Z.

[0115] The explanation of electrode component 22 can be found above, and will not be repeated here.

[0116] The terminal post component 23 can refer to the component in the battery cell 20 that connects the internal electrode component 22 and the external circuit. The terminal post body 232 can be a conductor, and its material can be, but is not limited to, metallic materials, such as copper or aluminum. The clamping assembly 231 can refer to a structure or component that connects to the first shell wall 2101 and is used to fix the terminal post body 232. The clamping assembly 231 consists of a bent clamping member 2311 and a straight support member 2312, which together form a clamping groove for clamping the terminal post body 232. The bent clamping member 2311 and the straight support member 2312 can be made of metallic or non-metallic materials, and the bent clamping member 2311 and the straight support member 2312 can be connected by methods including but not limited to welding and bonding.

[0117] The connection method between the electrode post body 232 and the electrode component 22 can include, but is not limited to, ultrasonic welding, ultrasonic pre-welding + laser welding, resistance welding, pressure welding, brazing, or adhesive bonding. The electrode post component 23 in the above structure can be either the positive or negative electrode of the battery cell 20. The electrode post body 232 can be a component made of a single material (e.g., pure aluminum electrode post, pure copper electrode post, etc.) or a component made of composite materials (e.g., copper-aluminum composite electrode post).

[0118] It is understandable that the pole body 232 is connected to the first shell wall 2101 through the clamping assembly 231, and the bending clamping member 2311 is located on the outside of the first shell wall 2101, while the straight support member 2312 is located on the inside of the first shell wall 2101 and is connected to the bending clamping member 2311. With this structure, the straight support member 2312 and the bending clamping member 2311 can fix the pole body 232 after docking, and the whole process is easy to process and has good manufacturability, which is conducive to improving the forming quality of the pole component 23. When the pole body 232 is subjected to a force moving away from the first shell wall 2101, for example, if the internal air pressure of the shell component 21 is high and applies a pull-out force to the pole body 232 towards the outside of the shell component 21, or if a pull-out force is generated by a conductive component (e.g., a bar) connected to the pole body 232, the bending clamp 2311 can apply a constraint force to the pole body 232 in the opposite direction to the pull-out force. Since the straight support 2312 is located inside the shell component 21, the straight support 2312 and the bending clamp 2311... The connection point is located on the side of the pole body 232 facing the housing component 21. The transmission path of the pull-out force on the pole body 232 will not pass through the connection point of the straight support 2312 and the bent clamping member 2311 (this connection point can be connected by means including but not limited to welding, bonding, etc.). Therefore, when the pole body 232 is subjected to pull-out force, the risk of weak points in the clamping assembly 231 composed of the bent clamping member 2311 and the straight support 2312 is low, and the probability of breakage or large deformation is also low.

[0119] It should also be noted that when the bending clamp 2311 is connected to the first shell wall 2101 by welding, and the straight support 2312 is connected to the bending clamp 2311 by welding, the electrode post component 23 with the above structure has two welding positions: the welding position between the bending clamp 2311 and the first shell wall 2101, and the welding position between the bending clamp 2311 and the straight support 2312. These two welding positions are located on both sides of the bending clamp 2311. Increasing the distance between the two welding positions can reduce the mutual influence between the two welding positions during welding, and also helps to improve the connection reliability between the bending clamp 2311, the straight support 2312 and the first shell wall 2101, thereby improving the reliability of the battery cell 20. Since the bending clamp 2311 is located on the side of the straight support 2312 away from the electrode component 22 and is connected to the straight support 2312, as shown in Figure 4, it can be understood that the bending clamp 2311 and the straight support 2312 are stacked and fitted in the third direction Z. This helps to make the structure of the clamping assembly 231 more compact, reduce the size of the clamping assembly 231 in the first direction X and the second direction, and thus, with the overall size of the electrode component 23 fixed, the size of the electrode body 232 can be adaptively increased, which also helps to increase the surface area of ​​the electrode body 232. When the electrode body 232 is welded to an external conductive component (e.g., a electrode plate), the surface of the electrode body 232 can have a larger welding area, which can increase the current carrying capacity of the electrode body 232 and improve the fast charge and discharge performance of the battery cell 20.

[0120] The housing component 21, the bending clamp 2311, the straight support 2312, and the pole body 232 or other components can be formed by processes such as stamping and extrusion. These processes are mature, inexpensive, and have high structural strength.

[0121] In the above technical solution, by configuring the terminal post component 23 as a clamping assembly 231 and a terminal post body 232, the clamping assembly 231, composed of the bent clamping member 2311 and the straight support member 2312, can clamp the terminal post body 232 while facilitating splicing and assembly, thereby reducing processing difficulty and improving manufacturability. Moreover, the straight support member 2312 is located inside the housing component 21 relative to the bent clamping member 2311. Therefore, when the terminal post body 232 is subjected to an outward pull-out force, the transmission path of the pull-out force does not pass through the connection position between the straight support member 2312 and the bent clamping member 2311. This helps to reduce the risk of weak points in the clamping assembly 231 when the terminal post body 232 is subjected to pull-out force, thereby improving the installation reliability between the terminal post body 232 and the clamping assembly 231, reducing the probability of the terminal post body 232 detaching from the first housing wall 2101 when subjected to force, and thus improving the reliability of the terminal post component 23, which in turn improves the reliability of the battery cell 20.

[0122] In some embodiments of this application, referring to Figures 3 and 4, the first shell wall 2101 is provided with a first through hole 2102, the bending clamp 2311 includes a connected main body 2011 and a bending part 2012, the main body 2011 is installed in the first through hole 2102 and is provided with a second through hole 2011a, the bending part 2012 is provided on the side of the main body 2011 located outside the shell component 21, the pole post body 232 passes through the second through hole 2011a, and the straight support 2312 is connected to the main body 2011.

[0123] The main body 2011 may refer to the straight portion of the bending clamp 2311, and the bending portion 2012 may refer to the bent portion of the bending clamp 2311.

[0124] In the above technical solution, a design structure for the bending clamp 2311 is provided. The main body 2011 of the bending clamp 2311 can be connected to the first through hole 2102 in an interlocking manner, improving the installation reliability of the bending clamp 2311 and the first shell wall 2101. The electrode body 232 passes through the second through hole 2011a, which also enables the two to interlock, improving the connection reliability of the electrode body 232 and the main body 2011. The straight support 2312 is connected to the main body 2011, which allows the straight support 2312 and the bending part 2012 to cooperate and clamp the electrode body 232, improving the installation reliability of the electrode body 232, thereby improving the reliability of the battery cell 20.

[0125] In some embodiments of this application, referring to FIG4, the bending portion 2012 includes a connected upright portion 20121 and a cantilever portion 20122. The upright portion 20121 is connected to the main body portion 2011, and the cantilever portion 20122 is connected to the upright portion 20121 and is arranged at an angle to the upright portion 20121.

[0126] Understandably, the bending section 2012 consists of two arms: the cantilever section 20122 is a suspended arm, and the upright section 20121 is an arm that is generally upright or directly upright.

[0127] When the pole post body 232 is subjected to a pull-out force moving away from the first shell wall 2101, the pole post body 232 acts on the cantilever portion 20122. Assuming the moment that causes the connection between the main body 2011 and the straight support member 2312 to break is M, the constraint arm 2301 formed on the bending clamping member 2311 has a length of L (refer to Figure 4, the length L of the constraint arm 2301 is the length of the line connecting the two points in the figure), and the force of the pole post body 232 acting on the cantilever portion 20122 is F1, then the product of F1 and L is greater than M. The connection between the main body 2011 and the straight support member 2312 breaks, which will lead to the risk of the pole post body 232 detaching from the clamping assembly 231.

[0128] In the above technical solution, the bending portion 2012 with the above structure can make the connection position of the main body 2011 and the straight support member 2312 closer to the distance of the cantilever portion 20122 in the first direction X. This makes the length of the constraint arm 2301 formed on the bending clamp 2311 smaller. The electrode body 232 needs to be subjected to a greater pull-out force to cause the connection position of the main body 2011 and the straight support member 2312 to break. This can reduce the risk of deformation between the main body 2011 and the straight support member 2312 causing the electrode body 232 to come off, thereby improving the reliability of the electrode component 23 and thus improving the reliability of the battery cell 20.

[0129] In some embodiments of this application, referring to FIG4, in the arm thickness direction of the upright arm 20121, the projected size of the upright arm 20121 on the first shell wall 2101 is smaller than the projected size of the cantilever arm 20122 on the first shell wall 2101.

[0130] As an example, the arm thickness direction of the upright arm 20121 can be seen in the first direction X of Figure 4.

[0131] "Projection of the upright arm 20121 onto the first shell wall 2101" and "projection of the cantilever 20122 onto the first shell wall 2101" can refer to the projections of the upright arm 20121 and the cantilever 20122 onto the first shell wall 2101 along a third direction Z.

[0132] It is understandable that the cantilever portion 20122 is usually small in the first direction X. Therefore, in the above-mentioned scheme, the upright portion 20121 can be approximately perpendicular to the first shell wall 2101. For example, the angle between the upright portion 20121 and the first shell wall 2101 can be 90±5 degrees, or the upright portion 20121 can be perpendicular to the first shell wall 2101. This is beneficial to make the connection position of the main body portion 2011 and the straight support member 2312 closer to the distance of the cantilever portion 20122 in the first direction X.

[0133] In the above technical solution, the upright arm 20121 and the cantilever arm 20122 are configured in the above relationship, which is beneficial to make the connection position of the main body 2011 and the straight support member 2312 as close as possible to the cantilever arm 20122. This helps to reduce the length of the constraint arm 2301 formed on the bending clamp 2311, and reduces the effect of deformation between the main body 2011 and the straight support member 2312 that could cause the pole body 232 to come off. This also improves the reliability of the pole component 23 and the reliability of the battery cell 20.

[0134] In some embodiments of this application, referring to FIG4, the upright arm 20121 is perpendicular to the main body 2011. In the above technical solution, by adopting the above structure, the distance between the connection position of the main body 2011 and the straight support member 2312 and the cantilever 20122 can be made closer, which is more effective in reducing the length of the constraint arm 2301 formed on the bending clamping member 2311, and the risk of the pole body 232 disengaging from the clamping assembly 231 is also smaller, which can further improve the reliability of the pole component 23 and the reliability of the battery cell 20.

[0135] In some embodiments of this application, referring to FIG4, the cantilever portion 20122 is parallel to the main body portion 2011.

[0136] In the above technical solution, by having the cantilever portion 20122 parallel to the main body portion 2011, it is beneficial for the cantilever portion 20122 to apply a vertical constraint force to the electrode body 232, which has a stronger constraint effect on the electrode body 232, thereby enhancing the connection stability between the bending clamp 2311 and the electrode body 232. This can further reduce the risk of the electrode body 232 detaching from the clamping assembly 231, improve the reliability of the electrode component 23, and thus improve the reliability of the battery cell 20.

[0137] In some embodiments of this application, referring to FIG4, the flat support member 2312 and the main body 2011 are welded together and a weld mark 203 is formed thereon. The projection of the weld mark 203 on the first shell wall 2101 and the projection of the upright arm 20121 on the first shell wall 2101 at least partially overlap.

[0138] It is understandable that the projection of the solder mark 203 on the first shell wall 2101 may be located inside the projection of the upright arm portion 20121 on the first shell wall 2101, or the projection of the solder mark 203 on the first shell wall 2101 and the projection of the upright arm portion 20121 on the first shell wall 2101 may overlap.

[0139] In the above technical solution, the above structure can make the distance between the solder mark 203 and the cantilever part 20122 relatively close, thereby reducing the length of the constraint arm 2301 formed on the bending clamp 2311. The pole body 232 is not easy to come out from between the bending clamp 2311 and the straight support 2312, which can improve the installation stability of the pole component 23 and thus improve the reliability of the battery cell 20.

[0140] In some embodiments of this application, referring to FIG4, the midpoint 204 of the upright arm 20121 is equally divided in the arm thickness direction, and the solder mark 203 is provided on the side of the midpoint 204 away from the pole body 232.

[0141] The dividing plane 204 can refer to a plane that equally divides the arm thickness dimension of the upright arm portion 20121 into two parts in the first direction X. For example, refer to FIG4.

[0142] In the above technical solution, the above solution can ensure that the length of the constraint arm 2301 formed on the bending clamp 2311 is small, and that the support area between the straight support 2312 and the main body 2011 has a suitable length in the arm thickness direction of the upright arm 20121. This is beneficial to improving the connection reliability between the straight support 2312 and the main body 2011, and thus improving the reliability of the pole post component 23.

[0143] In some embodiments of this application, referring to Figures 4 and 5, the support arm 20121 includes a connected support arm body 2021 and a support arm root 2022. The support arm body 2021 is connected to the cantilever arm 20122, and the support arm root 2022 is connected to the main body 2011. The side of the support arm root 2022 away from the pole post body 232 protrudes relative to the support arm body 2021.

[0144] The boom section 20121 can be composed of two parts: the boom body 2021 can refer to the part of the boom section 20121 whose size remains equal in the first direction X, and the boom root section 2022 can refer to the part of the boom section 20121 whose size gradually increases in the first direction X, and the size of the boom root section 2022 in the third direction Z is smaller than that of the boom body 2021.

[0145] In the above technical solution, the arm root 2022 has a larger arm thickness than the arm body 2021. This improves the strength and rigidity of the arm root 2022, reduces the risk of breakage or damage at the connection between the arm part 20121 and the body part 2011, and helps improve the overall reliability of the bending clamp 2311. Moreover, the area with increased arm thickness in the arm root 2022 is located on the side of the arm root 2022 away from the pole body 232. When the body part 2011 and the straight support 2312 are welded, the risk of the molten pool formed during the welding process burning through the arm root 2022 can be reduced, improving the reliability of the arm part 20121, thereby improving the installation reliability of the pole component 23, and thus improving the reliability of the battery cell 20.

[0146] In some embodiments of this application, referring to FIG4, the straight support member 2312 and the main body 2011 are welded together and a weld mark 203 is formed. The projected outer contour of the weld mark 203 on the first shell wall 2101 is located outside the projected outer contour of the upright arm 20121 on the first shell wall 2101 and is adjacent to the projected outer contour of the upright arm 20121 on the first shell wall 2101.

[0147] The straight support member 2312 and the main body 2011 can be annular components arranged around the pole body 232 in the third direction Z. The weld mark 203 formed by welding the straight support member 2312 and the main body 2011 can be annular weld or a weld with a certain length, and multiple weld marks are arranged along the circumference of the pole body 232.

[0148] "The projected outer contour of the solder mark 203 on the first shell wall 2101" can refer to the outer edge line of the projected pattern of the solder mark 203 on the first shell wall 2101. Similarly, "the projected outer contour of the upright arm 20121 on the first shell wall 2101" can refer to the outer edge line of the projected pattern of the upright arm 20121 on the first shell wall 2101.

[0149] In the above technical solution, the length of the support area between the straight support member 2312 and the main body 2011 can be further increased, the connection strength between the straight support member 2312 and the main body 2011 can be enhanced, and the length of the constraint arm 2301 formed on the bending clamp 2311 can be relatively small. That is, a better balance is achieved between the constraint arm 2301 and the length of the support area, which is conducive to improving the overall reliability of the pole component 23.

[0150] In some embodiments of this application, referring to FIG4, the bending clamp 2311 and the straight support 2312 are welded together and a weld mark 203 is formed thereon. The bending clamp 2311 is provided with a first guide portion 2051, and the straight support 2312 is provided with a second guide portion 2052. The second guide portion 2052 and the first guide portion 2051 cooperate with each other, and a weld mark 203 is formed between the second guide portion 2052 and the first guide portion 2051.

[0151] The first guide part 2051 and the second guide part 2052 can refer to structures that can cooperate with each other to play a guiding role, so that the bending clamp 2311 and the straight support 2312 can be assembled more easily.

[0152] In the above technical solution, by cooperating with the first guide portion 2051 of the bending clamp 2311 and the second guide portion 2052 of the straight support 2312, the assembly difficulty between the bending clamp 2311 and the straight support 2312 can be reduced, and the installation accuracy between the bending clamp 2311 and the straight support 2312 can be improved, thereby improving the connection reliability between the bending clamp 2311 and the straight support 2312, which in turn improves the overall reliability of the pole component 23.

[0153] In some embodiments of this application, referring to FIG5, the first guide portion 2051 and the second guide portion 2052 are configured as a stepped structure and have at least one stepped surface.

[0154] It is understood that the first guide portion 2051 and the second guide portion 2052 can have a stepped structure, and can include one stepped surface or multiple stepped surfaces.

[0155] In the above technical solution, the first guide part 2051 and the second guide part 2052 with the above structure can not only play a guiding role to facilitate the assembly of the bending clamp 2311 and the straight support 2312, but also play a positioning role, which can further improve the installation accuracy of the bending clamp 2311 and the straight support 2312, improve the connection reliability of the bending clamp 2311 and the straight support 2312, and thus improve the reliability of the pole component 23, which in turn improves the reliability of the battery cell 20.

[0156] In some embodiments of this application, referring to FIG6, the first guide portion 2051 and the second guide portion 2052 are configured as inclined surfaces.

[0157] In the above technical solution, the first guide portion 2051 and the second guide portion 2052 are inclined surfaces, which have a relatively simple structure, good manufacturability, and are conducive to reducing costs. Moreover, since the solder mark 203 is formed on the second guide portion 2052 and the first guide portion 2051, the surface of the inclined surface is relatively regular, which facilitates the adjustment of the welding point position. The welding point can meet the welding requirements at both the center and bottom positions of the inclined surface. That is, the inclined surfaces of the first guide portion 2051 and the second guide portion 2052 can provide greater tolerance for the welding position, making welding easier, which is conducive to improving the welding quality, improving the connection reliability of the bending clamp 2311 and the straight support 2312, and thus improving the reliability of the pole component 23 and the battery cell 20.

[0158] In some embodiments of this application, referring to FIG6, the bending clamp 2311 has an inner end face 2311a located inside the housing component 21, and the angle between the inclined surface formed by the first guide portion 2051 and the inner end face 2311a is α, wherein 91 degrees ≤ α ≤ 120 degrees.

[0159] α can be, but is not limited to, 91 degrees, 92 degrees, 93 degrees, 95 degrees, 97 degrees, 100 degrees, 102 degrees, 105 degrees, 107 degrees, 109 degrees, 110 degrees, 112 degrees, 115 degrees, 117 degrees, 120 degrees, etc.

[0160] If α is less than 91 degrees, the angle between the inclined surface and the inner end face 2311a is small, resulting in poor guiding effect and hindering the ease of assembly of the bending clamp 2311 and the straight support 2312. If α is greater than 120 degrees, the angle between the inclined surface and the inner end face 2311a is too large, affecting the positioning accuracy of the bending clamp 2311 and the straight support 2312, and weakening the guiding effect, which is detrimental to enhancing the connection stability of the bending clamp 2311 and the straight support 2312.

[0161] In the above technical solution, by setting the included angle between the inclined surface formed by the first guide part 2051 and the inner end surface 2311a within the above range, the included angle can be in a suitable range, which has a better guiding effect and positioning effect.

[0162] In some embodiments of this application, referring to Figures 4 and 6, the pole post component 23 includes an insulating sealing structure 233, and the pole post body 232 is insulated and sealed to the bending clamp 2311 and the straight support 2312 through the insulating sealing structure 233.

[0163] The insulating sealing structure 233 can refer to a structure that provides sealing and insulation between the clamping assembly 231 and the terminal body 232, and prevents electrolyte leakage inside the battery cell 20, as well as prevents external air and moisture from entering the battery cell 20.

[0164] In the above technical solution, the insulating and sealing structure 233 can achieve insulation and sealing between the electrode body 232 and the clamping assembly 231, reducing the leakage of electrolyte inside the housing component 21 from between the electrode body 232 and the clamping assembly 231. It can also reduce the risk of moisture, dust and other particulate matter from the external environment entering the housing component 21 from between the electrode body 232 and the clamping assembly 231, and reduce the probability of short circuit between the electrode body 232 and the clamping assembly 231, thereby improving the reliability of the battery cell 20.

[0165] In some embodiments of this application, referring to Figures 4 and 6, the insulating sealing structure 233 includes an outer insulating member 2331, which is disposed on the outer side of the bending clamping member 2311 away from the pole body 232. The outer contour of the projection of the first guide portion 2051 and the second guide portion 2052 onto the first shell wall 2101 is located within the outer contour of the projection of the outer insulating member 2331 onto the first shell wall 2101.

[0166] The external insulation component 2331 can refer to a structure or part that provides insulation to the outside of the bending clamp 2311, thereby reducing the risk of short circuit between the bending clamp 2311 and other external conductive parts. The material of the external insulation component 2331 can include, but is not limited to, plastics (e.g., polycarbonate, polypropylene, polyvinyl chloride, etc.), rubber (e.g., EPDM rubber, nitrile rubber, etc.), ceramics (e.g., alumina ceramics, boron nitride ceramics, etc.), etc. For example, the external insulation component 2331 can refer to plastic overmolded onto the bending clamp 2311.

[0167] "The outer contour of the projection of the first guide portion 2051 and the second guide portion 2052 onto the first shell wall 2101" can refer to the outer edge line of the projection pattern of the first guide portion 2051 and the second guide portion 2052 onto the first shell wall 2101. Similarly, "the outer contour of the projection of the outer insulating member 2331 onto the first shell wall 2101" can refer to the outer edge line of the projection pattern of the outer insulating member 2331 onto the first shell wall 2101.

[0168] It is understandable that when designing the pole member 23, the dimensions of the pole body 232, the upright arm 20121, and the outer insulating member 2331 in the first direction X affect the overall dimensions of the pole member 23 in the first direction X. In the above technical solution, the outer contours of the projections of the first guide portion 2051 and the second guide portion 2052 onto the first shell wall 2101 are located within the outer contours of the projection of the outer insulating member 2331 onto the first shell wall 2101. Therefore, the distribution of the outer insulating member 2331 with the first guide portion 2051 and the second guide portion 2052 is more compact, which helps to reduce the mating position of the first guide portion 2051 and the second guide portion 2052 and the dimension of the outer insulating member 2331 in the first direction X. This makes the overall structure of the pole member 23 more compact, reduces the overall dimension of the pole member 23 in the first direction X, and also reduces the volume of the pole member 23.

[0169] In the above technical solution, by setting an external insulating component 2331, insulation is provided on the outside of the bending clamp 2311, reducing the probability of short circuit between the bending clamp 2311 and other external conductive components. Furthermore, the external insulating component 2331 also provides protection, sealing the gap between the bending clamp 2311 and the terminal body 232, reducing the risk of external moisture, dust, and other particles entering the terminal component 23 and the housing component 21 along the gap. It also reduces damage to the bending clamp 2311 from mechanical impacts, thereby improving the reliability of the terminal component 23 and consequently the reliability of the battery cell 20. Moreover, the above structure also makes the overall structure of the terminal component 23 more compact, reducing its size, lowering costs, and facilitating the miniaturization of the battery cell 20.

[0170] In some embodiments of this application, referring to Figures 4 and 6, the insulating sealing structure 233 includes an outer insulating member 2331. The outer insulating member 2331 is disposed on the outer side of the bending clamping member 2311 away from the pole body 232. The outer contours of the projection of the first guide portion 2051 and the second guide portion 2052 on the first shell wall 2101 are located outside the outer contour of the projection of the outer insulating member 2331 on the first shell wall 2101 and close to the outer contour of the projection of the outer insulating member 2331 on the first shell wall 2101.

[0171] In the above technical solution, the outer contour of the projection of the first guide part 2051 and the second guide part 2052 on the first shell wall 2101 can also be located outside the outer contour of the projection of the outer insulating member 2331 on the first shell wall 2101, and close to the outer contour of the projection of the outer insulating member 2331 on the first shell wall 2101. In this solution, the overall structure of the pole post component 23 can be made relatively compact, which is also conducive to reducing the size of the pole post component 23, reducing costs, and realizing the miniaturization design of the battery cell 20.

[0172] In some embodiments of this application, referring to FIG7, the bending clamp 2311 has a first peripheral side 2311b near the first shell wall 2101, and the straight support 2312 has a second peripheral side 2312a near the first shell wall 2101. A solder mark 203 is formed between the second peripheral side 2312a and the first peripheral side 2311b.

[0173] In the above technical solution, the welding of the bending clamp 2311 and the straight support 2312 occurs on the first side 2311b and the second side 2312a. This method can increase the distance between the welding position and the root 2022 of the upright arm in the bending clamp 2311, which can reduce the risk of burning through the root 2022 of the upright arm during the welding process, improve the reliability of the clamping assembly 231, and thus improve the reliability of the pole post assembly 23 and the battery cell 20.

[0174] In some embodiments of this application, referring to FIG7, the pole member 23 includes an insulating sealing structure 233, the insulating sealing structure 233 includes an outer insulating member 2331, the outer insulating member 2331 is disposed on the outer side of the bending clamp 2311 away from the pole body 232, and the outer contour of the projection of the solder mark 203 on the first shell wall 2101 is located outside the outer contour of the projection of the outer insulating member 2331 on the first shell wall 2101, and away from the outer contour of the projection of the outer insulating member 2331 on the first shell wall 2101.

[0175] In the above technical solution, the above solution can reduce the risk of burning through the outer insulation component 2331 during the welding process of bending clamping component 2311 and straight support component 2312 to form weld mark 203, which is conducive to ensuring the insulation of the outer side of bending clamping component 2311 and thus improving the reliability of pole component 23.

[0176] In some embodiments of this application, referring to Figures 4, 6 and 7, the pole post component 23 includes an insulating sealing structure 233, which includes a sealing element 2332, which is sealed between the pole post body 232 and the straight support member 2312.

[0177] The seal 2332 can refer to a structure or component used to isolate the interior of the battery cell 20 from the external environment, and the material can include, but is not limited to, rubber (e.g., nitrile rubber), plastic (e.g., polyolefins), etc. The seal 2332 can be understood as a ring-shaped structure arranged in a third direction Z around the electrode post body 232.

[0178] In the above technical solution, by setting the sealing element 2332, the sealing between the electrode body 232 and the straight support 2312 can be improved, the risk of electrolyte leakage inside the housing component 21 can be reduced, and the probability of external moisture, dust and other particles entering the housing component 21 can be reduced, thereby improving the reliability of the battery cell 20.

[0179] In some embodiments of this application, referring to Figures 4, 6 and 7, the pole body 232 includes a connected body portion 2321 and a protrusion 2322, the protrusion 2322 being circumferentially arranged around the body portion 2321; the straight support member 2312 has an inner peripheral surface 2312b near the body portion 2321 and an outer surface 2312c near the protrusion 2322; the sealing member 2332 includes a connected first sealing portion 2061 and a second sealing portion 2062, the first sealing portion 2061 being sealed between the body portion 2321 and the inner peripheral surface 2312b, and the second sealing portion 2062 being disposed between the protrusion 2322 and the outer surface 2312c.

[0180] The pole body 232 consists of two parts: the main body 2321 is the main structure, and the protruding part 2322 is a protruding structure that protrudes relative to the main body 2321. Thus, the pole body 232 as a whole can be in the shape of a cross.

[0181] In the above technical solution, the first sealing part 2061 seals between the body part 2321 and the inner peripheral surface 2312b, and the second sealing part 2062 seals between the protrusion 2322 and the outer surface 2312c. The sealing member 2332 with this structure has a relatively complex sealing path and a relatively large sealing interface, which can enhance the sealing performance between the pole body 232 and the straight support member 2312, thereby improving the overall sealing performance of the pole component 23 and improving the reliability of the battery cell 20.

[0182] In some embodiments of this application, referring to Figures 6 and 7, one of the flat support member 2312 and the sealing member 2332 is provided with a protrusion 2071 and the other is provided with a recess 2072, and the recess 2072 and the protrusion 2071 are connected in cooperation.

[0183] It is understandable that the flat support member 2312 may be provided with a protrusion 2071 and the seal member 2332 may be provided with a recess 2072 (see Figures 6 and 7); or, the flat support member 2312 may be provided with a recess 2072 and the seal member 2332 may be provided with a protrusion 2071.

[0184] In the above technical solution, the straight support 2312 and the seal 2332 can be positioned and installed through the cooperation of the protrusion 2071 and the recess 2072, which is beneficial to the pre-assembly positioning of the straight support 2312 and the seal 2332, and can improve the installation stability and reliability of the seal 2332 on the straight support 2312.

[0185] In some embodiments of this application, referring to Figures 4, 6 and 7, the insulating sealing structure 233 includes an inner insulating member 2333, which is insulatingly disposed between the bending clamping member 2311 and the pole body 232.

[0186] The inner insulating component 2333 can refer to a structure or component that provides insulation between the bending clamp 2311 and the pole body 232 to prevent short circuits. The material of the inner insulating component 2333 can be referenced from that of the outer insulating component 2331, and will not be described again here.

[0187] In the above technical solution, by setting the inner insulating component 2333, an insulating connection can be achieved between the bending clamp 2311 and the terminal body 232, reducing the risk of short circuit between the bending clamp 2311 and the terminal body 232. In addition, it can also play a certain sealing role between the bending clamp 2311 and the terminal body 232, enhancing the sealing performance between the bending clamp 2311 and the terminal body 232. This can improve the reliability of the terminal component 23, and thus improve the reliability of the battery cell 20.

[0188] In some embodiments of this application, referring to Figures 4, 6 and 7, a gap 208 is provided between the inner insulating member 2333 and the sealing member 2332.

[0189] In the above technical solution, the inner insulating component 2333 and the sealing component 2332 may not be connected, and a gap 208 is maintained between them. This gap 208 can provide expansion space for the compression deformation of the sealing component 2332, thereby releasing the expansion force of the deformation of the sealing component 2332, which is beneficial to improving the reliability of the sealing component 2332.

[0190] In some embodiments of this application, the inner insulating member 2333 and the sealing member 2332 are abutting or connected to each other. In this technical solution, regardless of whether the inner insulating member 2333 and the sealing member 2332 are abutting or connected to each other, the inner insulating member 2333 and the sealing member 2332 can jointly form a continuous insulation and sealing barrier and have a larger insulation and sealing boundary, which can enhance insulation and sealing performance, thereby improving the reliability of the terminal component 23, and thus improving the reliability of the battery cell 20.

[0191] In some embodiments of this application, when the inner insulating component 2333 and the sealing component 2332 are connected, the inner insulating component 2333 and the sealing component 2332 are integrally formed. In this technical solution, the integrally formed structural design helps to reduce the number of parts, thereby reducing assembly steps, simplifying the production process, and reducing manufacturing costs.

[0192] In some embodiments of this application, referring to Figures 4, 6, and 7, the insulating sealing structure 233 includes an outer insulating member 2331. The outer insulating member 2331 is disposed on the outer side of the bending clamping member 2311 away from the electrode body 232 and is connected to the inner insulating member 2333. In this technical solution, the outer insulating member 2331 and the inner insulating member 2333 are connected, thereby forming a continuous insulating barrier and increasing the insulating boundary. This enhances the insulation performance between the electrode body 232 and the bending clamping member 2311, thereby improving the reliability of the electrode component 23 and thus improving the reliability of the battery cell 20.

[0193] In some embodiments of this application, the outer insulating component 2331 and the inner insulating component 2333 are integrally molded parts. In this technical solution, the integrally molded structural design helps to reduce the number of parts, thereby reducing assembly steps, simplifying the production process, and reducing manufacturing costs.

[0194] In some embodiments of this application, the bending clamp 2311 is arranged circumferentially around the pole body 232, and / or the straight support 2312 is arranged circumferentially around the pole body 232.

[0195] In the above technical solution, the bending clamping component 2311 and the straight support component 2312 are ring-shaped structural components, which can better surround the pole body 232, thereby enhancing the clamping effect on the pole body 232 and improving the installation stability and reliability of the pole body 232 in the clamping assembly 231.

[0196] In some embodiments of this application, referring to FIG6, the size of the main body 2011 in the direction from the inside to the outside of the second through hole 2011a is H1, wherein 1.5mm≤H1≤5mm.

[0197] For example, the "direction from the inside to the outside of the second through hole 2011a" can refer to the third direction Z in Figure 6. H1 can be, but is not limited to, 1.5mm, 1.8mm, 2mm, 2.2mm, 2.5mm, 2.8mm, 3mm, 3.2mm, 3.5mm, 3.8mm, 4mm, 4.2mm, 4.5mm, 4.8mm, 5mm, etc.

[0198] If H1 is less than 1.5mm, the thickness of the main body 2011 is relatively small, resulting in low strength. When welding the straight support 2312 to the main body 2011, it is easy to weld through the main body 2011. If H1 is greater than 5mm, the thickness of the main body 2011 is relatively large. While ensuring that the straight support 2312 is not easily welded through the main body 2011, this can easily lead to excessive performance in the main body 2011, increasing material costs and the overall weight of the battery cell 20.

[0199] In the above technical solution, by setting the size of the main body 2011 in the direction from the inside to the outside of the second through hole 2011a within the above range, the main body 2011 can have a suitable strength, and it is not easy to weld through the main body 2011 when it is welded to the straight support member 2312. It can also make the main body 2011 have a suitable weight, which is beneficial to make the battery cell 20 have a larger energy density.

[0200] In some embodiments of this application, referring to FIG3, the housing component 21 includes a housing body 211 and a cover plate 212. One end of the housing body 211 is formed with an opening, and the cover plate 212 covers the opening. A first housing wall 2101 is provided on the housing body 211 or the cover plate 212.

[0201] In the above technical solution, the terminal component 23 can be installed on the housing body 211 or on the cover plate 212, which provides more options for the design of the battery cell 20 to meet different requirements.

[0202] In some embodiments of this application, referring to FIG3, the first shell wall 2101 is provided on the cover plate 212. Since the cover plate 212 is welded to the shell body 211 afterward, the first through hole 2102 can be manufactured before the cover plate 212 is installed on the shell body 211. This reduces the processing difficulty of the first through hole 2102, enhances manufacturability, and also helps to improve product yield.

[0203] This application provides a battery cell 20, including: a housing component 21, an electrode component 22, and a terminal component 23. The housing component 21 includes a first housing wall 2101; the electrode component 22 is disposed inside the housing component 21; the terminal component 23 includes a terminal body 232 and a straight support member 2312, the terminal body 232 being electrically connected to the electrode component 22; wherein, the first housing wall 2101 is provided with a bending clamping member 2311, and the bending clamping member 2311 is connected to the first housing wall 2101 as a whole, the bending clamping member 2311 and the straight support member 2312 simultaneously clamping the two circumferential sides of the terminal body 232, and the bending clamping member 2311 is disposed on the side of the straight support member 2312 away from the electrode component 22, and is directly connected to the first housing wall 2101 as a whole.

[0204] It is understood that the straight support member 2312 of the terminal post component 23 and the bent clamping member 2311 of the first shell wall 2101 together form a clamping structure for clamping the terminal post body 232. Other structures of the battery cell 20 can be referred to in any of the preceding embodiments, and will not be repeated here.

[0205] In the above technical solution, under the premise that the electrode body 232 is not easy to detach from the clamping assembly 231 and the electrode component 23 as a whole has good reliability, more options can be provided for the design of the battery cell 20 to meet different requirements.

[0206] This application provides a battery device 100, including a battery cell 20 as described in any of the preceding embodiments.

[0207] In the above technical solution, since the battery cell 20 has high reliability, the battery device 100 using the battery cell 20 can have good reliability.

[0208] This application provides an electrical device 1000, including a battery cell 20 as described in any of the preceding embodiments, or a battery device 100 as described in the preceding embodiments.

[0209] In the above technical solution, since the battery cell 20 or battery device 100 has high reliability, it is beneficial to improve the reliability of the electrical device 1000 that uses the battery cell 20 or battery device 100.

[0210] Referring to Figures 3 to 5, 8 and 9 below, a battery cell 20 according to an embodiment of the present invention includes: a housing component 21, an electrode component 22 and a terminal component 23.

[0211] The housing component 21 includes a first housing wall 2101, and the first housing wall 2101 is provided with a first through hole 2102.

[0212] Electrode component 22 is disposed inside housing component 21.

[0213] The pole component 23 includes a clamping assembly 231, a pole body 232, and an insulating sealing structure 233.

[0214] One end of the clamping assembly 231 is connected to the first shell wall 2101, and the other end clamps the electrode body 232. The electrode body 232 is electrically connected to the electrode component 22. The clamping assembly 231 includes a bent clamping member 2311 and a straight support member 2312 connected together. The bent clamping member 2311 and the straight support member 2312 simultaneously clamp both sides of the electrode body 232 in the circumferential direction, and the bent clamping member 2311 is located on the side of the straight support member 2312 away from the electrode component 22, and is directly connected to the first shell wall 2101 as a whole.

[0215] The bending clamp 2311 includes a connected main body 2011 and a bending part 2012. The main body 2011 is installed in the first through hole 2102 and has a second through hole 2011a. The bending part 2012 is located on the side of the main body 2011 outside the housing component 21. The pole post body 232 passes through the second through hole 2011a. The straight support 2312 is welded to the main body 2011.

[0216] The bending part 2012 includes a vertical arm part 20121 and a cantilever part 20122 connected together. The vertical arm part 20121 is connected to the main body part 2011, and the cantilever part 20122 is vertically connected to the vertical arm part 20121.

[0217] The straight support member 2312 and the main body 2011 are welded together and a weld mark 203 is formed. The outer contour of the weld mark 203 on the first shell wall 2101 is located outside the outer contour of the projection of the upright arm 20121 on the first shell wall 2101, and is adjacent to the outer contour of the projection of the upright arm 20121 on the first shell wall 2101.

[0218] The bending clamp 2311 is provided with a first guide portion 2051, and the straight support 2312 is provided with a second guide portion 2052. The second guide portion 2052 and the first guide portion 2051 cooperate with each other, and a solder mark 203 is formed between the second guide portion 2052 and the first guide portion 2051. The first guide portion 2051 and the second guide portion 2052 are constructed as a stepped structure and form a stepped surface.

[0219] The pole body 232 is insulated and sealed to the bending clamp 2311 and the straight support 2312 through the insulating and sealing structure 233. The insulating and sealing structure 233 includes an outer insulating component 2331, a sealing component 2332 and an inner insulating component 2333. The outer insulating component 2331 is located on the outer side of the bending clamp 2311 away from the pole body 232; the sealing component 2332 is sealed between the pole body 232 and the straight support 2312; and the inner insulating component 2333 is insulatingly located between the bending clamp 2311 and the pole body 232.

[0220] In the above-described battery cell 20, referring to Figure 8, during the assembly stage of the terminal component 23, the sealing member 2332 can be pre-assembled on the straight support member 2312, and then the terminal body 232 is inserted into the straight support member 2312, and the bending clamping member 2311 is installed on the terminal body 232. The inner insulating member 2333 and the outer insulating member 2331 are insulatedly connected to the terminal body 232, and then the main body 2011 of the straight support member 2312 and the bending clamping member 2311 are welded together. Referring to Figure 9, the pole body 232 of the pole member 23 can be welded to the tab 221 of the electrode member 22 first, and then assembled together with the electrode member 22 into the housing member 21. Next, the pole member 23 passes through the first through hole 2102 to the outside of the housing member 21, and the main body 2011 of the bending clamp 2311 and the first housing wall 2101 are welded together on the outside of the first housing wall 2101.

[0221] With this structure, the riveting of the terminal post 23 in the battery cell 20 can be performed outside the housing component 21, which improves the riveting quality and manufacturability of the terminal post 23 and enhances its reliability, thereby improving the reliability of the battery cell 20. Simultaneously, the welding positions of the bending clamp 2311 and the first housing wall 2101, as well as the welding positions of the bending clamp 2311 and the straight support 2312, are located on both sides of the bending clamp 2311. This increases the distance between the two welding positions, reducing their mutual influence and helping to reduce the constraint arm 2301 formed on the bending clamp 2311. This improves the overall reliability of the terminal post 23 and, consequently, the reliability of the battery cell 20.

[0222] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The above are merely preferred embodiments of this application and are not intended to limit the application. For those skilled in the art, unless otherwise specified, all implementation methods and optional implementation methods of this application can be combined to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined to form new technical solutions. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery cell, wherein, include: The housing component includes a first housing wall; An electrode component, wherein the electrode component is disposed within the housing component; The electrode component includes a clamping assembly and an electrode body, one end of the clamping assembly is connected to the first shell wall, and the other end clamps the electrode body; the electrode body is electrically connected to the electrode component. The clamping assembly includes a bent clamping member and a straight support member connected together. The bent clamping member and the straight support member simultaneously clamp both sides of the pole body in the circumferential direction. The bent clamping member is located on the side of the straight support member away from the electrode component and is directly connected to the first shell wall as an integral part.

2. The battery cell according to claim 1, wherein, The first shell wall is provided with a first through hole. The bending clamping member includes a connected main body and a bending part. The main body is installed in the first through hole and is provided with a second through hole. The bending part is located on the side of the main body located outside the shell component. The pole body passes through the second through hole. The straight support member is connected to the main body.

3. The battery cell according to claim 2, wherein, The bending section includes a connected upright arm and a cantilever arm. The upright arm is connected to the main body, and the cantilever arm is connected to the upright arm and is set at an angle to the upright arm.

4. The battery cell according to claim 3, wherein, In the arm thickness direction of the upright arm, the projected size of the upright arm on the first shell wall is smaller than the projected size of the cantilever arm on the first shell wall.

5. The battery cell according to any one of claims 3 to 4, wherein, The vertical arm is perpendicular to the main body.

6. The battery cell according to any one of claims 3 to 5, wherein, The cantilever portion is parallel to the main body portion.

7. The battery cell according to any one of claims 3 to 6, wherein, The straight support member and the main body are welded together and have weld marks. The projection of the weld marks on the first shell wall and the projection of the upright arm on the first shell wall at least partially overlap.

8. The battery cell according to claim 7, wherein, The middle surface of the vertical arm is divided equally along the arm thickness direction, and the solder mark is provided on the side of the middle surface away from the pole body.

9. The battery cell according to claim 7 or 8, wherein, The support arm includes a connected support arm body and a support arm root. The support arm body is connected to the cantilever arm, and the support arm root is connected to the main body. The side of the support arm root away from the pole body protrudes relative to the support arm body.

10. The battery cell according to any one of claims 3 to 7, wherein, The straight support member and the main body are welded together and have weld marks. The outer contour of the weld mark projected on the first shell wall is located outside the outer contour of the upright arm on the first shell wall and is adjacent to the outer contour of the upright arm on the first shell wall.

11. The battery cell according to any one of claims 1 to 10, wherein, The bending clamp and the straight support are welded together and have weld marks. The bending clamp is provided with a first guide portion and the straight support is provided with a second guide portion. The second guide portion and the first guide portion cooperate with each other, and the weld marks are formed between the second guide portion and the first guide portion.

12. The battery cell according to claim 11, wherein, The first guide portion and the second guide portion are constructed as a stepped structure and have at least one stepped surface.

13. The battery cell according to claim 12, wherein, The first guide portion and the second guide portion are constructed as inclined surfaces.

14. The battery cell according to claim 13, wherein, The bending clamp has an inner end face located inside the housing component, and the angle between the inclined surface formed by the first guide and the inner end face is α, wherein 91 degrees ≤ α ≤ 120 degrees.

15. The battery cell according to any one of claims 11 to 14, wherein, The pole component includes an insulating and sealing structure, and the pole body is insulated and sealed to the bending clamp and the straight support through the insulating and sealing structure.

16. The battery cell according to claim 15, wherein, The insulating sealing structure includes an outer insulating member, which is disposed on the outer side of the bending clamp away from the pole body. The outer contours of the projections of the first guide portion and the second guide portion onto the first shell wall are located within the outer contours of the projection of the outer insulating member onto the first shell wall.

17. The battery cell according to claim 15, wherein, The insulating sealing structure includes an outer insulating member, which is disposed on the outer side of the bending clamp away from the pole body. The outer contours of the projections of the first guide portion and the second guide portion on the first shell wall are located outside the outer contour of the projection of the outer insulating member on the first shell wall and close to the outer contour of the projection of the outer insulating member on the first shell wall.

18. The battery cell according to claim 11, wherein, The bending clamp has a first circumferential side near the first shell wall, and the straight support has a second circumferential side near the first shell wall, with the weld mark formed between the second circumferential side and the first circumferential side.

19. The battery cell according to claim 18, wherein, The pole component includes an insulating and sealing structure, which includes an outer insulating member. The outer insulating member is disposed on the outer side of the bending clamp away from the pole body. The outer contour of the projection of the solder mark on the first shell wall is located outside the outer contour of the projection of the outer insulating member on the first shell wall and away from the outer contour of the projection of the outer insulating member on the first shell wall.

20. The battery cell according to any one of claims 1 to 19, wherein, The pole component includes an insulating and sealing structure, which includes a sealing element that is sealed between the pole body and the straight support member.

21. The battery cell according to claim 20, wherein, The pole body includes a connected body portion and a protrusion portion, the protrusion portion being circumferentially arranged around the body portion; the straight support member has an inner circumferential surface near the body portion and an outer surface near the protrusion portion; the sealing member includes a connected first sealing portion and a second sealing portion, the first sealing portion being sealed between the body portion and the inner circumferential surface, and the second sealing portion being disposed between the protrusion portion and the outer surface.

22. The battery cell according to claim 20, wherein, One of the flat support member and the sealing member has a protrusion and the other has a recess, and the recess is connected to the protrusion.

23. The battery cell according to any one of claims 20 to 22, wherein, The insulating and sealing structure includes an inner insulating component, which is insulatingly disposed between the bending clamp and the pole body.

24. The battery cell according to claim 23, wherein, A gap is provided between the inner insulating element and the sealing element.

25. The battery cell according to claim 23, wherein, The inner insulating element and the sealing element abut against or are connected to each other.

26. The battery cell according to claim 25, wherein, When the inner insulating component and the sealing component are connected, the inner insulating component and the sealing component are integrally formed.

27. The battery cell according to any one of claims 23 to 26, wherein, The insulating sealing structure includes an outer insulating component, which is disposed on the outer side of the bending clamp away from the pole body and connected to the inner insulating component.

28. The battery cell according to claim 27, wherein, The outer insulating component and the inner insulating component are integrally molded.

29. The battery cell according to any one of claims 1 to 28, wherein, The bending clamp is arranged circumferentially around the pole body, and / or the straight support is arranged circumferentially around the pole body.

30. The battery cell according to any one of claims 2 to 29, wherein, In the direction from the inside to the outside of the second through hole, the size of the main body is H1, where 1.5mm≤H1≤5mm.

31. A single battery cell, wherein, include: The housing component includes a first housing wall; An electrode component, wherein the electrode component is disposed within the housing component; The electrode component includes an electrode body and a straight support member, wherein the electrode body is electrically connected to the electrode component; The first shell wall is provided with a bending clamping member, and the bending clamping member is connected to the first shell wall as an integral part. The bending clamping member and the straight support member simultaneously clamp the two sides of the pole body in the circumferential direction. The bending clamping member is located on the side of the straight support member away from the electrode component and is directly connected to the first shell wall as an integral part.

32. A battery device, wherein, Includes the battery cell as described in any one of claims 1 to 31.

33. An electrical appliance, wherein, Includes the battery cell as described in any one of claims 1 to 31, or the battery device as described in claim 32.

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