WO2024016610A1

WO2024016610A1 - Pole, battery cell, and battery pack

Info

Publication number: WO2024016610A1
Application number: PCT/CN2022/144281
Authority: WO
Inventors: 张猛; 戴亨伟; 杨伟
Original assignee: 欣旺达动力科技股份有限公司
Priority date: 2022-07-20
Filing date: 2022-12-30
Publication date: 2024-01-25
Also published as: CN218242180U

Abstract

Disclosed are a pole, a battery cell, and a battery pack. The pole comprises: a pole body; a pole cap, the pole cap being located on an end of the pole body, and the pole cap and the pole body together forming a first recess; and a flange part, the flange part being located at the end of the pole body away from the pole cap, and the flange part and the pole body together forming a second recess. The pole cap and the flange part are configured to be folded in a direction away from the center line of the pole body and jointly define a clamping cavity.

Description

Poles, single cells and battery packs

This application claims priority to the Chinese patent application filed with the China Patent Office on July 20, 2022, with the application number 202221886337.3 and the invention name "Polar, Single Cell and Battery Pack", the entire content of which is incorporated herein by reference. Applying.

Technical field

This application relates to the field of battery technology, specifically to a pole, a single battery and a battery pack.

Background technique

Currently, when assembling battery poles, riveting aluminum blocks are required to rivet and fix the poles. The riveted aluminum block is usually provided with riveted holes that match the poles, and the surface of the pole cylinder is provided with a circle of riveted protrusions corresponding to the riveted holes. The riveting fixation of the pole is achieved through the cooperation of the riveting holes of the riveted aluminum block and the riveting protrusions.

However, the riveted assembly structure that uses riveted aluminum blocks and poles will lead to a higher height of the poles, which will compress the internal space of the battery and affect the energy density of the battery. At the same time, the assembly process of this riveted assembly structure is more complicated and the processing is difficult.

technical problem

This application provides a pole, a single battery and a battery pack, aiming to solve the technical problems of high pole height and difficulty in assembling in the current pole riveting assembly structure.

Technical solutions

In a first aspect, this application provides a pole, including:

cylinder;

Column cap, the column cap is located at one end of the column, and the column cap and the column form a first groove;

The flange part is located at the end of the column away from the column cap, and the flange part and the column form a second groove;

Wherein, the column cap and the flange portion are configured to be folded in a direction away from the center line of the column and jointly define a clamping cavity.

In some embodiments, the column cap includes a first extension part and a first connection part. The first connection part is connected between the first extension part and the column. The first extension part extends in a direction away from the centerline of the column. A connecting part and the column form a first groove;

The flange part includes a second extension part and a second connection part. The second connection part is connected between the second extension part and the column. The second extension part extends in a direction away from the center line of the column. The second connection part is connected to the column. The body is surrounded by a second groove;

Wherein, the first extension part, the first connection part, the column, the second connection part and the second extension part jointly define a clamping cavity.

In some embodiments, the first extension portion has a plurality of first openings, and the plurality of first openings are spaced apart from a circumferential outer edge of the first extension portion.

In some embodiments, the second extension portion has a plurality of second openings, and the plurality of second openings are spaced apart from a circumferential outer edge of the second extension portion.

In some embodiments, the first extension portion has a plurality of first openings, and the plurality of first openings are spaced apart from a circumferential outer edge of the first extension portion; and the second extension portion has a plurality of first openings. Second openings, the plurality of second openings are arranged at intervals on the circumferential outer edge of the second extension part.

In some embodiments, the length of the first connecting portion along the axial direction of the cylinder is less than the length of the second connecting portion along the axial direction of the cylinder.

In some embodiments, the extension length of the first extension portion in the direction away from the center line of the cylinder is greater than the extension length of the second extension portion in the direction away from the center line of the cylinder.

In some embodiments, the extension length of the first extension part away from the centerline of the column is greater than the extension length of the second extension part away from the centerline of the column; the thickness of the first extension part is greater than the thickness of the second extension part.

In some embodiments, the cross-sectional area of the first connection portion gradually decreases in a direction away from the column.

In some embodiments, the cross-sectional area of the second connection portion gradually decreases in a direction away from the column.

In some embodiments, in a direction away from the column, the cross-sectional area of the first connecting portion gradually decreases; and the cross-sectional area of the second connecting portion gradually decreases.

In some embodiments, the depth of the second groove is equal to the depth of the first groove; the thickness of the post is less than the depth of the first groove.

In a second aspect, this application provides a single battery, including:

The top cover body has a first surface and a second surface that are opposite to each other, and a through hole penetrating the first surface and the second surface;

As for the pole described in the first aspect, the column of the pole is located in the through hole;

One of the pole cap and the flange portion is in contact with the first surface, and the other one is in contact with the second surface, so that the top cover body is at least partially located in the clamping cavity of the pole.

In some embodiments, the first surface is configured as an interior surface of the battery;

The column cap includes a first extension part and a first connection part, the first connection part is connected between the first extension part and the column, and the first extension part extends in a direction away from the center line of the column;

The flange part includes a second extension part and a second connection part, the second connection part is connected between the second extension part and the column, and the second extension part extends in a direction away from the center line of the column;

Wherein, the first extension part is in contact with the first surface, the second extension part is in contact with the second surface, and the thickness of the first extension part is greater than the thickness of the second extension part.

In a third aspect, the present application provides a battery pack, including a battery box and a plurality of single cells as described in the second aspect, and the plurality of single cells are electrically connected together and placed in the battery box.

beneficial effects

Compared with the prior art, this application provides a pole, a single battery and a battery pack, in which a pole cap and a flange are respectively provided at both ends of the pole, so that there is a gap between the flange and the pole cap. The clamping cavity is defined, and the riveting assembly can be achieved by using the structure of the pole itself when assembling the pole. This eliminates the need to use riveted aluminum blocks, which is beneficial to reducing the difficulty of pole assembly and the height of the pole itself; at the same time, because the pole cap and pole The body forms a first groove, and the flange part and the column form a second groove. This not only reduces the weight of the pole, but also reduces the difficulty of forming the rivet part and the column cap, and lengthens the flange part and the column cap. The lateral length of the column cap after riveting is beneficial to ensuring the reliability of the riveted structure of the pole itself.

In addition, since the first groove and the second groove are provided at both ends of the pole, while further reducing the weight of the pole, the connecting conductor outside the battery can be connected in the second groove, and the connecting conductor inside the battery can be connected Being connected in the first groove reduces the thickness of the conductor through which the pole passes current, which is beneficial to reducing the resistance of the pole and improving battery space utilization.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. , for those skilled in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic cross-sectional view of a pole provided in an embodiment of the present application;

Figure 2 is a top view of the pole provided in the embodiment of the present application;

Figure 3 is another top view of the pole provided in the embodiment of the present application;

Figure 4 is another schematic cross-sectional view of the pole provided in the embodiment of the present application;

Figure 5 is another top view of the pole provided in the embodiment of the present application;

Figure 6 is a labeled schematic diagram of the pole provided in the embodiment of the present application;

Figure 7 is a schematic structural diagram of a single battery provided in the embodiment of the present application;

Figure 8 is an exploded schematic diagram of the top cover body and pole provided in the embodiment of the present application before assembly;

Figure 9 is an assembly schematic diagram of the top cover body and the pole provided in the embodiment of the present application after assembly;

Figure 10 is a partial enlarged schematic view of position A in Figure 9 of the present application.

Embodiments of the invention

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", The directions or positional relationships indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on those shown in the accompanying drawings The orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. limit. In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, features defined as “first” and “second” may explicitly or implicitly include one or more of the described features. In the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically limited.

In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the invention. In the following description, details are set forth for the purpose of explanation. It will be understood that one of ordinary skill in the art will recognize that the present invention may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and features disclosed herein.

Embodiments of the present application provide a pole, a single battery, and a battery pack, each of which will be described in detail below.

First, refer to Figure 1, which shows a schematic cross-sectional view of the pole 100 in the embodiment of the present application, wherein the pole 100 includes:

cylinder 10;

The column cap 20 is located at one end of the column 10, and the column cap 20 and the column 10 form a first groove 110;

The flange portion 30 is located at the end of the column 10 away from the column cap 20, and the flange portion 30 and the column 10 form a second groove 120;

Wherein, the column cap 20 and the flange portion 30 are configured to be folded in a direction away from the center line of the column 10 and jointly define a clamping cavity 130 .

Specifically, the pillar 10 is a conductive main structure of the pole 100 so as to facilitate the connection between the internal conductive components of the battery and the external conductive components of the battery through the pillar 10 . For example, the shape of the cylinder 10 can be a cylinder, a polygonal prism, for example, a right prism with a square, rectangular or rhombus cross-section, and the material of the cylinder 10 can be copper, aluminum, silver or a combination thereof. It can be understood that the shape of the cylinder 10 can also be a combination of a cylinder 10 or a polygonal prism 10 , for example, the lower part of the cylinder 10 is a cylinder 10 and the upper part is a square right prism.

The column cap 20 is located at one end of the column 10, and the column cap 20 and the column 10 form a first groove 110, so that the battery internal conductive components/battery external conductive components connected to the pole 100 can be connected in the first groove. Within 110. In some embodiments of the present application, in a projection plane perpendicular to the centerline of the column 10 , the projection of the column cap 20 at least partially does not coincide with the projection of the column 10 , and the projection of the column cap 20 does not coincide with the projection of the column 10 The non-overlapping portion forms a limiting structure at one end of the pole 10 to limit the movement of the pole 100 from the pole cap 20 to the flange portion 30 .

As an example, refer to FIGS. 1 and 2 . FIG. 2 shows a top view of the pole 100 in the embodiment of the present application, in which the pole cap 20 includes a first extension part 21 and a first connecting part 22 . A connecting portion 22 is between the first extending portion 21 and the column 10 . The first extending portion 21 extends in a direction away from the center line of the column 10 . The first connecting portion 22 and the column 10 form a first groove 110 , wherein the first extension part 21 is annular and the projection of the first extension part 21 does not coincide with the projection of the column 10 , that is to say, the first extension part 21 forms a limiting structure to limit the polar pole 100 from being directed from the column cap 20 to turning over. Movement of the edge part 30; the first connecting part 22 is a cylinder connected to the end surface of the cylinder 10, and its inner wall surface and the end surface of the cylinder form a first groove 110 to facilitate fixing the internal conductive parts of the battery/the external conductive parts of the battery. .

As another example, refer to FIG. 3 , which shows another top view of the pole 100 in the embodiment of the present application, in which the first extension part 21 includes a plurality of holes distributed on the outer wall of the first connecting part 22 . A sector-shaped limiting structure.

The flange portion 30 is located at an end of the column 10 away from the column cap 20 , and the flange portion 30 and the column 10 form a second groove 120 so that the battery's internal conductive components/battery external conductive components connected to the pole 100 can be connected. within the second groove 120 . In some embodiments of the present application, in a projection plane perpendicular to the centerline of the cylinder 10 , the projection of the flange portion 30 does not coincide with the projection of the cylinder 10 at least partially, so as to limit the movement of the cylinder 10 from the flange portion 30 Pointing to the movement of the pole cap 20, and at the same time, the flange portion 30 combined with the pole cap 20 can realize the position limiting at both ends of the pole 10. When the pole 100 is installed, the components (such as the top cover) fixed to the pole 100 are at least partially located on the flip side. In the clamping cavity 130 between the edge 30 and the pole cap 20 , the pole pole 100 is fixed.

As an example, referring to Figures 1 and 2, the flange portion 30 includes a second extension portion 31 and a second connection portion 32. The second connection portion 32 is connected between the second extension portion 31 and the column 10. The two extending portions 31 extend in a direction away from the center line of the column 10 . The second connecting portion 32 and the column 10 form a second groove 120 . The second extending portion 31 is an annular ring located on the outer wall of the second connecting portion 32 . In the limiting structure, the projection of the second extension part 31 does not coincide with the projection of the column 10 to limit the movement of the column 10 from the flange part 30 to the column cap 20; the second connecting part 32 is connected to the end surface of the column. The inner wall surface of the cylinder and the end surface of the cylinder form a second groove 120 to facilitate fixing the internal conductive components/external conductive components of the battery.

As another example, referring to FIG. 3 , the second extension part 31 includes a plurality of sector-shaped limiting structures distributed on the outer wall surface of the second connecting part 32 .

In some embodiments of the present application, for example, for embodiments in which the column cap 20 includes a first extension part 21 and a first connection part 22, and the flange part 30 includes a second extension part 31 and a second connection part 32, continue to refer to FIG. 1. Among them, the first extension part 21, the first connection part 22, the column 10, the second connection part 32 and the second extension part 31 jointly define a clamping cavity 130, so as to facilitate riveting assembly by utilizing the structure of the pole 100 itself. , so that the mounting component (such as the top cover) is partially located in the clamping cavity 130 .

It should be noted that the pole cap 20 can be formed during the processing or assembly process of the pole 100 , and the flange portion 30 is usually formed during the assembly of the pole 100 . Taking the pole cap 20 being pre-processed on the pole 100 as an example, during the assembly process of the pole 100, the first extension 21 of the pole cap 20 pre-processed on the pole 100 can first restrict the pole 100 from being turned from the pole cap 20. The edge portion 30 moves, and then the second extension portion 31 is formed by riveting the flange portion 30. The second extension portion 31 restricts the movement of the pole 100 from the flange portion 30 to the pole cap 20, thereby completing the movement of the pole 100. Assembly process. It can be understood that the flange portion 30 and the column cap 20 can also be formed on the end of the column 10 through other processing methods, such as casting, welding or bonding.

In this application, the pole cap 20 and the flange part 30 are respectively provided at both ends of the pole body 10 of the pole pole 100, so that a clamping cavity 130 is defined between the flange part 30 and the pole cap 20, which can be used when assembling the pole pole 100. The structure of the pole 100 itself can be riveted and assembled, so there is no need to use riveted aluminum blocks, which is beneficial to reducing the assembly difficulty of the pole 100 and the height of the pole 100 itself; at the same time, since the pole cap 20 and the pole 10 form a first groove, The flange portion 30 and the column 10 form a second groove, which can not only reduce the weight of the pole 100 but also reduce the difficulty of forming the flange portion 30 and the column cap 20 and extend the riveting of the flange portion 30 and the column cap 20 The final transverse length is beneficial to ensuring the reliability of the riveting structure of the pole 100 itself.

In addition, since the first groove 110 and the second groove 120 are provided at both ends of the pole 10, while further reducing the weight of the pole 100, the connecting conductors outside the battery can be connected in the second groove 120, and the connection conductors inside the battery can The connection conductor can be connected in the first groove 110, so that the thickness of the conductor through which current passes through the pole 100 is reduced, which is beneficial to reducing the resistance of the pole 100 and improving the battery space utilization.

In some embodiments of the present application, the cross-sectional area of the first connection portion 22 gradually decreases in the direction away from the column 10 , that is, the closer the end of the column cap 20 is disposed to the column 10 , the smaller the first connection portion 22 is. The thinner the thickness of the first connecting part 22, the thinner the part of the first connecting part 22 away from the column 10, which can facilitate riveting to form the first extension part 21, and the thicker part of the first connecting part 22 close to the column 10 has sufficient structural strength. , which can avoid the phenomenon that the lower part of the first connecting part 22 is broken due to riveting.

Taking FIG. 4 as an example, FIG. 4 shows another schematic cross-sectional view of the pole 100 in the embodiment of the present application. The cross-sectional area of the first connecting part 22 gradually decreases, so that the shape of the second groove 120 has a partial A conical cone.

Similarly, in some embodiments of the present application, the cross-sectional area of the second connecting portion 32 gradually decreases in the direction away from the column 10 , that is, the closer the end of the flange portion 30 is provided to the column 10 , the thinner the thickness of the second connecting part 32, the thinner part of the second connecting part 32 away from the column 10 can facilitate riveting to form the second extension part 31, while the part of the second connecting part 32 close to the column 10 is thicker, so that It has sufficient structural strength to avoid breakage of the upper part of the second connecting part 32 due to riveting. Taking FIG. 4 as an example, the cross-sectional area of the second connecting portion 32 gradually decreases, so that the second groove 120 is shaped into a truncated cone with a conical surface.

It can be understood that, in addition to being a truncated cone with a partial conical surface, the first groove 110 and the second groove 120 can also be in other shapes, such as cylindrical grooves, direction Groove, inverted trapezoidal groove, inverted triangular pyramid groove, etc.

In some embodiments of the present application, refer to FIG. 5 , which shows another top view of the pole 100 in the embodiment of the present application, in which the first extension 21 has a plurality of first openings 211 arranged at annular intervals. , the plurality of first openings 211 are spaced at the circumferential edge of the first extension part 21 , the first openings 211 penetrate the upper and lower surfaces of the first extension part 21 , and the plurality of first openings 211 divide the first extension part 21 into multiple Since the first extension part 21 is broken into multiple parts, when the first connecting part 22 is riveted to form the first extension part 21, it can be advantageous to form the first extension part 21 and avoid the first extension part 21 from being deformed. As a result, the structure of the first extension part 21 is damaged and the root of the first extension part 21 is insufficient in strength.

Similarly, in some embodiments of the present application, continuing to refer to FIG. 5 , the second extension part 31 has a plurality of second openings 311 arranged at annular intervals, and the plurality of second openings 311 are arranged at intervals around the second extension part 31 . Toward the edge, the second openings 311 penetrate the upper and lower surfaces of the second extension part 31, and at the same time, the plurality of second openings 311 divide the second extension part 31 into multiple parts. Since the second extension part 31 is broken to form multiple parts, When riveting the second connection part 32 to form the second extension part 31, it can be advantageous to form the second extension part 31 and avoid the structural damage of the second extension part 31 due to deformation, which ultimately causes the second extension part 31 to have insufficient strength. .

In some embodiments of the present application, refer to FIG. 6 , which shows a labeled schematic diagram of the pole 100 in the embodiment of the present application, in which the extension length of the first extension 21 in a direction away from the center line of the pole 10 l1 is greater than the extension length l2 of the second extension part 31 in the direction away from the centerline of the pole 10. When the pole 100 is assembled, one end of the pole 100 with the pole cap 20 can be installed on the side facing the inside of the battery. Since the first The extension length of the extension part 21 in the direction away from the center line of the column 10 is longer, which allows the column cap 20 to have a larger contact surface with the fixed component (such as the top cover), thereby ensuring the structural strength of the assembly of the column cap 20 and ultimately preventing the The pole 100 is detached outward due to the internal stress of the battery.

In some embodiments of the present application, continue to refer to FIG. 6 , in which the thickness h1 of the column cap 20 is greater than the thickness h2 of the flange portion 30 . Since the thickness h1 of the column cap 20 is thicker, the assembly structure of the column cap 20 can also be increased. Strength, thereby preventing the pole 100 from outwardly detaching due to internal stress of the battery. As an example, the thickness h1 of the column cap 20 is 0.5-3 mm, and the thickness h2 of the flange part 30 is 0.5-2 mm.

Further, in some embodiments of the present application, the depth H1 of the first groove 110 is equal to the depth H2 of the second groove 120 , and the thickness of the column 10 is smaller than the depth of the first groove 110 . Since the second groove 120 The depth of the first groove 110 is equal to that of the first groove 110 . At this time, the column 10 is located in the middle of the column 10 . Therefore, it is possible to prevent the column 10 from being too close to the flange portion 30 or the column cap 20 , causing the flange portion 30 or the column cap 20 to rivet. The phenomenon of difficulty in press forming; at the same time, the thickness of the column 10 is smaller than the depth of the first groove 110, and the thickness of the column 10 can also be reduced as much as possible, thereby reducing the resistance generated by the thickness of the column 10 itself.

In some embodiments of the present application, the diameter d1 of the second groove 120 is equal to the diameter d2 of the first groove 110 , which can make the thickness of the first connecting part 22 and the second connecting part 32 equal, ensuring that the column 10 can move up and down. The ends have considerable structural strength.

In some embodiments of the present application, the length of the first connecting portion 22 along the axial direction of the cylinder 10 is less than the length of the second connecting portion 32 along the axial direction of the cylinder 10 .

In some embodiments of the present application, the thickness of the first connecting portion 22 along the radial direction of the cylinder 10 is greater than the thickness of the second connecting portion 32 along the radial direction of the cylinder 10 .

In some embodiments of the present application, the length of the first connecting portion 22 along the axial direction of the cylinder 10 is less than the length of the second connecting portion 32 along the axial direction of the cylinder 10 , and the thickness of the first connecting portion 22 along the radial direction of the cylinder 10 is greater than the thickness of the second connecting portion 32 along the radial direction of the cylinder 10 .

This can improve the structural strength of the first connecting portion 22 , and install the end of the pole cap 20 on the pole 100 on the side facing the inside of the battery, thereby ensuring the structural strength of the assembly location of the pole cap 20 .

It is worth noting that the above content about the pole 100 is intended to clearly illustrate the implementation verification process of the present application. Those skilled in the art can make equivalent modified designs under the guidance of the present application, such as the first connection part 22, the second The shape of the connecting part 32 is designed as a square cylinder; as another example, the shape of the flange part 30 and the column cap 20 is square.

Further, in order to better implement the pole 100 in the embodiment of the present application, the present application provides a single battery based on the pole 100. Refer to Figures 7, 8 and 9. Figure 7 shows is a schematic structural diagram of a single battery in the embodiment of the present application. Figure 8 shows an exploded schematic diagram of the top cover body and poles before assembly in the embodiment of the present application. Figure 9 shows a schematic diagram of the structure of the single cell in the embodiment of the present application. A structural schematic diagram of the main body of the top cover and the pole after assembly. The single cell includes:

The top cover body 200 has an opposite first surface 210 and a second surface 220, and a through hole 230 penetrating the first surface 210 and the second surface 220;

The pole 100 of any one of claims 1 to 8, the pole 10 of the pole 100 is located in the through hole 230;

One of the pole cap 20 and the flange part 30 of the pole 100 is in contact with the first surface 210 , and the other one is in contact with the second surface 220 , so that the top cover body 200 is at least partially positioned in the clamping position. inside cavity 130.

Specifically, the top cover body 200 serves as a load-bearing installation component of the pole 100, and a through hole 230 penetrating the first surface 210 and the second surface 220 is provided on the top cover body 200. The through hole 230 is adapted to the pole 100, so that the pole 100 penetrates the top cover body 200 and connects the battery internal conductor and the battery external conductor.

As an example, refer to Fig. 8 and Fig. 10. Fig. 10 shows a partially enlarged schematic diagram of position A in Fig. 9 of the present application, in which the top cover body 200 includes a top cover sheet 201, an upper insulating sheet 202, and a lower plastic 203. And the sealing ring 204, the top cover sheet 201 and the upper insulating sheet 202 are fitted together, the top cover sheet 201 and the upper insulating sheet 202 are both provided with corresponding round holes, the upper insulating sheet 202 and the sealing ring 204 are annular, and the upper edge sheet It is filled in the circular hole of the top cover sheet 201, and the sealing ring 204 is filled in the circular hole of the lower plastic 203. The annular sealing ring 204 and the upper insulating sheet 202 form a through hole 230.

It can be understood that the top cover body 200 can also have other structural forms. For example, the lower plastic 203 is annular and is filled in the round hole of the top cover sheet 201 together with the sealing ring 204 and the upper insulating sheet 202; for example, the top cover body 200 can also have other structural forms. The cover body 200 only includes a top cover sheet 201, and the portion of the top cover body 200 located in the through hole 230 forms an insulation and sealing structure.

The column body 10 of the pole pole 100 is located in the through hole 230. One of the pole cap 20 and the flange portion 30 of the pole pole 100 is in contact with the first surface 210, and the other one is in contact with the second surface 220. Therefore, the top cover body 200 is at least partially clamped in the clamping cavity 130 between the column cap 20 and the flange portion 30 , so that the pole post 100 is fixed on the top cover body 200 through its own riveting structure.

In some embodiments of the present application, taking Figure 10 as an example, the column cap 20 is specifically abutted on the lower plastic 203, the flange portion 30 is specifically abutted on the upper insulating sheet 202, and the sealing ring 204 is filled in the through hole 230. By squeezing the lower plastic 203 and the upper insulating sheet 202 respectively from both ends of the pole 100, the lower plastic 203 and the upper insulating sheet 202 are finally fixed on the upper and lower surfaces of the top cover sheet 201 respectively. While the insulating sheet 202 is fixed, the lower plastic 203 and the upper insulating sheet 202 are used to electrically isolate the pole 100 from the top cover.

In some embodiments of the present application, for example, for embodiments in which the column cap 20 includes a first extension part 21 and a first connection part 22, and the flange part 30 includes a second extension part 31 and a second connection part 32, the first connection part The first extension part 22 is connected between the first extension part 21 and the column 10 , and the first extension part 21 extends in a direction away from the center line of the column 10 ; the second connection part 32 is connected to the second extension part 31 Between the column 10 and the column 10 , the second extension 31 extends in a direction away from the center line of the column 10 . The first surface 210 is configured as the inner surface of the battery. The thickness h1 of the first extension 21 is greater than that of the second extension. The thickness h2 of 31 allows the column cap 20 to have a relatively large contact surface with the lower surface of the top cover body 200 and the thickness of the first extension 21 is thicker, thereby ensuring the structural strength of the assembly of the column cap 20 and ultimately avoiding battery damage. Internal stress causes the pole 100 to detach outward.

In some embodiments of the present application, the extension length l1 of the first extension part 21 in the direction away from the centerline of the column 10 is greater than the extension length l2 of the second extension part 31 in the direction away from the centerline of the column 10, so that the column cap 20 is in line with the centerline of the column 10. The lower surface of the top cover body 200 has a relatively large contact surface and the thickness of the first extension 21 is relatively thick, thereby ensuring the structural strength of the post cap 20 assembly location and ultimately preventing the pole 100 from being detached outward due to the internal stress of the battery. The phenomenon.

In some embodiments of the present application, the thickness h1 of the first extension part 21 is greater than the thickness h2 of the second extension part 31 , and the extension length l1 of the first extension part 21 in the direction away from the centerline of the column 10 is greater than the second extension part 31 The extension length l2 in the direction away from the centerline of the column 10 allows the column cap 20 to have a relatively large contact surface with the lower surface of the top cover body 200 and the thickness of the first extension 21 is thicker, thereby ensuring the assembly of the column cap 20 This improves the structural strength and ultimately prevents the pole 100 from outwardly detaching due to the internal stress of the battery.

It can be understood that the column cap 20 can also be in contact with the second surface 220 , and the flange portion 30 can also be in contact with the first surface 210 .

In this application, the pole cap 20 and the flange part 30 are respectively provided at both ends of the pole body 10 of the pole pole 100, so that a clamping cavity 130 is defined between the flange part 30 and the pole cap 20, which can be used when assembling the pole pole 100. The structure of the pole 100 itself can be riveted and assembled on the top cover body 200, thereby eliminating the need to use riveted aluminum blocks, which is beneficial to reducing the assembly difficulty of the pole 100 and the height of the pole 100 itself.

Further, in order to better implement the single battery of the present application, based on the single battery, the present application also provides a battery pack. The battery pack includes a battery box and a plurality of single cells described in any of the above embodiments. Battery, multiple single cells are electrically connected together and placed in a battery box. The single cells can be lithium-ion batteries, nickel-hydrogen batteries, fuel cells, lead-acid batteries and sodium-sulfur batteries. Since the battery pack in the embodiment of the present application includes the pole 100 in the above embodiment, it has all the beneficial effects of the pole 100 in the above embodiment, which will not be described again.

In the above embodiments, each embodiment is described with its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the above detailed descriptions of other embodiments and will not be described again here.

The basic concepts have been described above. It is obvious to those skilled in the art that the above detailed disclosure is only an example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements and corrections are suggested in this application, so such modifications, improvements and corrections still fall within the spirit and scope of the exemplary embodiments of this application.

At the same time, this application uses specific words to describe the embodiments of the application. For example, "one embodiment", "an embodiment", and/or "some embodiments" means a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that “one embodiment” or “an embodiment” or “an alternative embodiment” mentioned twice or more at different places in this specification does not necessarily refer to the same embodiment. . In addition, certain features, structures or characteristics in one or more embodiments of the present application may be appropriately combined.

Similarly, it should be noted that, in order to simplify the presentation of the disclosure of the present application and thereby facilitate understanding of one or more embodiments of the utility model, in the foregoing description of the embodiments of the present application, multiple features are sometimes combined into one embodiment. , drawings or descriptions thereof. However, this method of disclosure does not imply that the subject matter of the application requires more features than are mentioned in the claims. In fact, embodiments may have less than all features of a single disclosed embodiment.

In some embodiments, numbers are used to describe the quantities of components and properties. It should be understood that such numbers used to describe the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Grooming. Unless otherwise stated, "about," "approximately," or "substantially" means that the stated number is allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximations that may vary depending on the desired features of the individual embodiment. In some embodiments, numerical parameters should account for the specified number of significant digits and use general digit preservation methods. Although the numerical fields and parameters used to confirm the breadth of the ranges in some embodiments of the present application are approximations, in specific embodiments, such numerical values are set as accurately as feasible.

Each patent, patent application, patent application publication and other material, such as articles, books, instructions, publications, documents, etc., cited in this application is hereby incorporated by reference into this application in its entirety, to the extent that it is inconsistent with the content of this application. Application history documents that are inconsistent or conflicting are excluded, as are documents (currently or later appended to this application) that limit the broadest scope of the claims of this application. It should be noted that if there is any inconsistency or conflict between the descriptions, definitions, and/or use of terms in the accompanying materials of this application and the content described in this application, the description, definitions, and/or use of terms in this application shall prevail. .

The above is a detailed introduction to a pole, a single battery and a battery pack provided by the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present utility model. The description of the above embodiments is only for To help understand the method of the present utility model and its core idea; at the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of the present utility model. In summary, the present invention The contents of the description should not be construed as limitations of the present invention.

Among them, 100 poles, 10 cylinders, 110 first groove, 120 second groove, 130 clamping cavity, 20 column cap, 21 first extension part, 211 first opening, 22 first connecting part, 30 turning Edge, 31 second extension part, 311 second opening, 32 second connection part, 200 top cover body, 210 first surface, 220 second surface, 230 through hole, 201 top cover sheet, 202 upper insulating sheet, 203 Lower plastic, 204 sealing ring.

H1: Depth of the first groove;

H2: Depth of the second groove;

H3: Thickness of cylinder;

h1: thickness of the first extension;

h2: thickness of the second extension part;

L1: The length of the first connecting part along the axial direction of the cylinder;

L2: The length of the second connecting part along the axial direction of the cylinder;

l1: The extension length of the first extension part in the direction away from the center line of the cylinder;

l2: The extension length of the second extension part in the direction away from the center line of the cylinder.

Claims

A pole, characterized by including:

cylinder;

A column cap, the column cap is located at one end of the column, and the column cap and the column form a first groove;

A flange portion, the flange portion is located at an end of the column away from the column cap, and the flange portion and the column form a second groove;

Wherein, the column cap and the flange portion are configured to be folded in a direction away from the center line of the column and jointly define a clamping cavity.
The pole according to claim 1, wherein the pole cap includes a first extension part and a first connection part, and the first connection part is connected between the first extension part and the pole body. , the first extension part extends in a direction away from the center line of the column, and the first connecting part and the column form a first groove;

The flange part includes a second extension part and a second connection part. The second connection part is connected between the second extension part and the column. The second extension part moves away from the column. Extending in the direction of the centerline, the second connecting portion and the column form a second groove;

Wherein, the first extension part, the first connection part, the column, the second connection part and the second extension part jointly define the clamping cavity.
The pole of claim 2, wherein the first extension portion has a plurality of first openings, and the plurality of first openings are spaced apart from a circumferential outer edge of the first extension portion.
The pole according to claim 2, wherein the second extension part has a plurality of second openings, and the plurality of second openings are spaced apart from the circumferential outer edge of the second extension part.
The pole according to claim 2, wherein the first extension portion has a plurality of first openings, and the plurality of first openings are spaced apart from the circumferential outer edge of the first extension portion; The second extension part has a plurality of second openings, and the plurality of second openings are spaced apart from a circumferential outer edge of the second extension part.
The pole according to any one of claims 2 to 5, characterized in that the length of the first connecting part along the axial direction of the column is smaller than the length of the second connecting part along the axial direction of the column. .
The pole according to any one of claims 2 to 6, wherein the extension length of the first extension part away from the center line of the pole is greater than the extension length of the second extension part away from the pole. The extension length in the direction of the centerline.
The pole according to any one of claims 2 to 6, wherein the thickness of the first extension part is greater than the thickness of the second extension part.
The pole according to any one of claims 2 to 6, wherein the extension length of the first extension part away from the center line of the pole is greater than the extension length of the second extension part away from the pole. The extension length in the direction of the centerline;

The thickness of the first extension part is greater than the thickness of the second extension part.
The pole according to any one of claims 2 to 9, wherein the cross-sectional area of the first connecting portion gradually decreases in a direction away from the pole.
The pole according to any one of claims 2 to 9, wherein the cross-sectional area of the second connecting portion gradually decreases in a direction away from the pole.
The pole according to any one of claims 2 to 9, characterized in that, in a direction away from the pole, the cross-sectional area of the first connecting part gradually decreases; the cross-sectional area of the second connecting part gradually decreases; The cross-sectional area gradually decreases.
The pole according to any one of claims 1 to 12, wherein the depth of the second groove is equal to the depth of the first groove;

The thickness of the column is less than the depth of the first groove.
A single battery, characterized by including:

The top cover body has a first surface and a second surface that are opposite to each other, and a through hole penetrating the first surface and the second surface;

The pole according to any one of claims 1 to 13, the column of the pole is located in the through hole;

Wherein, one of the column cap and the flange portion is in contact with the first surface, and the other is in contact with the second surface, so that the top cover body is at least partially located on the pole. inside the clamping cavity of the column.
The single cell of claim 14, wherein the first surface is configured as an inner surface of the cell;

The column cap includes a first extension part and a first connection part. The first connection part is connected between the first extension part and the column. The first extension part moves away from the center of the column. The direction of the line extends;

The flange part includes a second extension part and a second connection part. The second connection part is connected between the second extension part and the column. The second extension part moves away from the column. The direction of the center line extends;

Wherein, the first extension part is in contact with the first surface, the second extension part is in contact with the second surface, and the thickness of the first extension part is greater than the thickness of the second extension part. .
A battery pack, characterized in that it includes a battery box and a plurality of single cells according to any one of claims 14 to 15, and the plurality of single cells are electrically connected together and placed in the battery box. .