CN220628147U - Cylindrical battery - Google Patents

Abstract

The utility model provides a cylindrical battery, relates to the technical field of batteries, and aims to solve the problem of optimizing a positive electrode current collecting disc and a shell structure to a certain extent, and improve welding communication area and overcurrent capacity while ensuring that the winding core does not need to be adjusted after being put into a shell. The utility model provides a cylindrical battery, which comprises a shell, a winding core and an anode current collecting disc, wherein the winding core is arranged on the shell; one side of the positive electrode current collecting disc is connected with a positive electrode lug of the winding core, one side of the positive electrode current collecting disc, which is away from the positive electrode lug, is provided with a connecting convex part along the circumferential direction of the positive electrode current collecting disc, and the connecting convex part is positioned at the edge of the positive electrode current collecting disc; the casing includes the end cover, and the end cover includes main part and cooperation concave part, and the cooperation concave part forms along the circumference of main part and the position that corresponds the connection convex part, and the terminal surface of connection convex part can laminate with the terminal surface of cooperation concave part mutually to make main part laminate with anodal mass flow dish mutually.

Description

Cylindrical battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a cylindrical battery.

Background

In order to improve the space utilization rate, the positive electrode of the full-lug aluminum shell cylindrical battery is communicated with the shell in a penetrating welding mode by adopting a current collecting disc, so that the shell is positively charged, and the positive electrode space is saved.

However, in the prior art, in order to avoid the need of adjusting the direction after the winding core of the welded positive current collecting disc is put into the shell, the position of penetration welding is usually arranged at the center of the bottom of the shell, so that the welding communication area is small and the overcurrent capacity is limited.

Accordingly, there is an urgent need to provide a cylindrical battery to solve the problems existing in the prior art to some extent.

Disclosure of Invention

The utility model aims to provide a cylindrical battery, so as to optimize the structure of a positive current collecting disc and a shell to a certain extent, and improve the welding communication area and the overcurrent capacity while ensuring that the winding core does not need to be adjusted after being put into the shell.

The utility model provides a cylindrical battery, which comprises a shell, a winding core and an anode current collecting disc, wherein the winding core is arranged on the shell; one side of the positive electrode current collecting disc is connected with a positive electrode lug of the winding core, one side of the positive electrode current collecting disc, which is away from the positive electrode lug, is provided with a connecting convex part along the circumferential direction of the positive electrode current collecting disc, and the connecting convex part is positioned at the edge of the positive electrode current collecting disc; the shell comprises an end cover, the end cover comprises a main body part and a matching concave part, the matching concave part is formed along the circumferential direction of the main body part and corresponds to the position of the connecting convex part, and the end face of the connecting convex part can be attached to the end face of the matching concave part, so that the main body part is attached to the positive electrode current collecting disc.

And a welding concave part is formed at the position, which is away from one side of the positive electrode current collecting disc and corresponds to the matching concave part, of the end cover, and the welding concave part is arranged along the circumferential direction of the shell.

Specifically, a first inclined surface is formed on one side of the fitting recess, and a second inclined surface is formed on the connecting protrusion corresponding to the first inclined surface.

Further, the radial dimension of the mating recess is greater than the radial dimension of the connecting protrusion.

Still further, the radial dimension of the welding recess is smaller than the radial dimension of the connection protrusion, and the connection protrusion, the fitting recess, and the welding recess are concentrically arranged.

Wherein the axial dimension of the connecting convex part is the same as the axial dimension of the matching concave part.

Specifically, dodging holes are formed in the center of the positive electrode current collecting plate, liquid injection holes are formed in the positions, corresponding to the dodging holes, of the main body portion, reinforcing protruding portions are formed in the edges, facing to one side of the positive electrode current collecting plate and located in the liquid injection holes, of the main body portion, and the reinforcing protruding portions can be inserted into the dodging holes.

Further, the reinforcing protrusion has a dimension in the axial direction that is not greater than a dimension in the axial direction of the positive current collecting plate.

The cylindrical battery provided by the utility model further comprises a negative electrode cover plate component and a negative electrode current collecting disc; the negative electrode current collecting disc is connected with a negative electrode tab of the winding core, and the negative electrode cover plate assembly is connected with the shell.

Specifically, the negative electrode cover plate assembly comprises a negative electrode cover plate and a negative electrode post, wherein the negative electrode post is connected with the negative electrode current collecting disc, and one end of the negative electrode post protrudes out of one side of the negative electrode cover plate, which is away from the negative electrode current collecting disc.

Compared with the prior art, the cylindrical battery provided by the utility model has the following advantages:

the utility model provides a cylindrical battery, which comprises a shell, a winding core and an anode current collecting disc, wherein the winding core is arranged on the shell; one side of the positive electrode current collecting disc is connected with a positive electrode lug of the winding core, one side of the positive electrode current collecting disc, which is away from the positive electrode lug, is provided with a connecting convex part along the circumferential direction of the positive electrode current collecting disc, and the connecting convex part is positioned at the edge of the positive electrode current collecting disc; the casing includes the end cover, and the end cover includes main part and cooperation concave part, and the cooperation concave part forms along the circumference of main part and the position that corresponds the connection convex part, and the terminal surface of connection convex part can laminate with the terminal surface of cooperation concave part mutually to make main part laminate with anodal mass flow dish mutually.

From this analysis shows that through the connection convex part that forms in the positive current collecting plate one side that deviates from the anodal utmost point ear, the cooperation concave part that the position that the end cover at the casing corresponds the connection convex part formed, thereby can realize the stable contact between positive current collecting plate and the casing through cooperation between cooperation concave part and the connection convex part, and because the connection convex part in this application forms along the circumference of positive current collecting plate, correspondingly, the cooperation concave part forms along the circumference of end cover, consequently, after the anodal utmost point ear welding of anodal current collecting plate and core, need not to adjust the direction in entering casing and can realize the contact between positive current collecting plate and the end cover.

The connecting convex part is formed at the edge of the positive electrode current collecting disc, so that the area of the connecting convex part can be maximized on one hand, and the welding communication area and the overcurrent capacity can be improved to a certain extent while the winding core direction is not required to be adjusted after the winding core is arranged in the shell. On the other hand, because the end cover and the positive electrode current collecting disc are connected in a penetration welding mode, and the matched concave part is formed corresponding to the connecting convex part, the welding position can be clearly defined, the thickness of the welding position of the shell is reduced to a certain extent, the penetration welding operation is simpler, and the welding quality is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an anode current collecting plate in a cylindrical battery according to an embodiment of the present utility model;

fig. 2 is an assembly schematic diagram of a first view angle of a positive current collecting disc and a housing in a cylindrical battery according to an embodiment of the present utility model;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

fig. 4 is an assembly schematic diagram of a second view angle between a positive current collecting plate and a housing in a cylindrical battery according to an embodiment of the present utility model;

fig. 5 is a schematic diagram of the overall structure of a cylindrical battery according to an embodiment of the present utility model.

In the figure: 1-a housing; 101-end caps; 1011-mating recess; 1012-a main body portion; 1013-a first inclined surface; 1014-a liquid injection hole; 1015-reinforcing the protrusions; 1016-weld recess; 2-winding the core; 3-an anode current collecting disc; 301-connecting protrusions; 3011-a second inclined surface; 302-dodging the hole; 4-a negative electrode cover plate; 5-a negative electrode post; 6-explosion-proof valve; 7-protective sheet.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.

In the description of the embodiments of the present application, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," "coupled" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As used herein, the term "and/or" includes any one of the listed items of interest and any combination of any two or more.

For ease of description, spatially relative terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. Singular forms also are intended to include plural forms unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" are intended to specify the presence of stated features, integers, operations, elements, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, operations, elements, and/or groups thereof.

Variations from the shapes of the illustrations as a result, of manufacturing techniques and/or tolerances, are to be expected. Accordingly, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shapes that occur during manufacture.

The features of the examples described herein may be combined in various ways that will be apparent after an understanding of the disclosure of the present application. Further, while the examples described herein have a variety of configurations, other configurations are possible as will be apparent after an understanding of the present disclosure. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.

As shown in fig. 1 to 3, the present utility model provides a cylindrical battery, which comprises a housing 1, a winding core 2 and a positive electrode current collecting plate 3; one side of the positive electrode current collecting disc 3 is connected with the positive electrode lug of the winding core 2, one side of the positive electrode current collecting disc 3, which is away from the positive electrode lug, is provided with a connecting convex part 301 along the circumferential direction of the positive electrode current collecting disc 3, and the connecting convex part 301 is positioned at the edge of the positive electrode current collecting disc 3; the case 1 includes the end cap 101, and the end cap 101 includes the main body portion 1012 and the mating concave portion 1011, the mating concave portion 1011 being formed along the circumferential direction of the main body portion 1012 and corresponding to the position of the connection convex portion 301, the end face of the connection convex portion 301 being able to be fitted to the end face of the mating concave portion 1011 so that the main body portion 1012 is fitted to the positive electrode current collecting plate 3.

Compared with the prior art, the cylindrical battery provided by the utility model has the following advantages:

according to the cylindrical battery provided by the utility model, the connecting convex part 301 formed on one side of the positive current collecting disc 3, which is far away from the positive electrode lug, is provided with the matching concave part 1011 formed at the position of the end cover 101 of the shell 1 corresponding to the connecting convex part 301, so that stable contact between the positive current collecting disc 3 and the shell 1 can be realized through matching between the matching concave part 1011 and the connecting convex part 301, and the connecting convex part 301 in the application is formed along the circumferential direction of the positive current collecting disc 3, and correspondingly, the matching concave part 1011 is formed along the circumferential direction of the end cover 101, so that after the positive current collecting disc 3 and the positive electrode lug of the winding core 2 are welded, the positive current collecting disc 3 and the end cover 101 can be contacted in the shell 1 without adjusting the direction.

The connection convex part 301 in the application is formed at the edge of the positive electrode current collecting disc 3, so that the area of the connection convex part 301 can be maximized on one hand, and the welding communication area and the overcurrent capacity can be improved to a certain extent while the direction of the winding core 2 is not required to be adjusted after the winding core 2 is put into the shell. On the other hand, since the end cap 101 and the positive electrode current collecting plate 3 are connected by penetration welding, and the mating concave portion 1011 is formed corresponding to the connection convex portion 301, the welding position can be clarified, the thickness of the welding position of the case 1 can be reduced to a certain extent, the penetration welding operation is simpler, and the welding quality is ensured.

Alternatively, as shown in fig. 2 in combination with fig. 3, a welding recess 1016 is formed at a position corresponding to the mating recess 1011 on a side of the end cap 101 facing away from the positive current collecting plate 3 in the present application, and the welding recess 1016 is provided along the circumferential direction of the case 1.

By forming the welding recess 1016 at the position corresponding to the mating recess 1011 on the side of the end cap 101 facing away from the positive electrode current collecting plate 3, the welding position can be further clarified, the welding area is limited, and the failure of communicating the end cap 101 with the positive electrode current collecting plate 3 due to dislocation during welding is avoided, so that the welding precision can be improved.

It can be appreciated that the thickness of the end cap 101 can be further reduced by forming the welding recess 1016 at a position corresponding to the mating recess 1011, so that the penetration welding difficulty can be further reduced and the welding quality can be improved.

It should be noted that, since the welding recess 1016 in the present application is provided along the circumferential direction of the end cover 101, the welding in the present application may be performed fully along the circumferential direction of the welding recess 1016, or may be performed intermittently or intermittently.

Alternatively, as shown in fig. 3, a first inclined surface 1013 is formed on one side of the engagement recess 1011 in the present application, and a second inclined surface 3011 is formed on the side of the connection protrusion 301 corresponding to the first inclined surface 1013.

By forming the first inclined surface 1013 on one side of the engagement recess 1011 and forming the second inclined surface 3011 on the side of the connection protrusion 301 corresponding to the first inclined surface 1013, the guiding action on the positive electrode current collecting plate 3 can be achieved by the engagement of the first inclined surface 1013 and the second inclined surface 3011.

It is to be understood that, since the end cap 101 in the present application is formed with the mating recess 1011 corresponding to the position of the connection protrusion 301 and the connection protrusion 301 is formed at the edge of the positive electrode current collecting plate 3, the mating recess 1011 is also formed at the edge of the end cap 101, and accordingly, the first inclined surface 1013 described above in the present application is actually an outer side wall of the main body portion 1012.

Alternatively, as shown in fig. 3, the radial dimension of the mating concave portion 1011 in the present application is larger than the radial dimension of the connecting convex portion 301.

The radial dimensions of the mating concave portion 1011 and the connecting convex portion 301 are the radial widths of the mating concave portion 1011 and the connecting convex portion 301, and by making the radial dimension of the mating concave portion 1011 larger than the radial dimension of the connecting convex portion 301, a larger contact area can be provided for the connecting convex portion 301, so that the fault tolerance between the positive current collecting plate 3 and the end cover 101 can be improved, and the problem of cold joint caused by the fact that the positive current collecting plate 3 cannot be tightly attached to the main body 1012 of the end cover 101 after the positive current collecting plate 3 and the positive tab of the winding core 2 are eccentrically welded can be avoided to a certain extent.

Alternatively, as shown in fig. 3, the radial dimension of the welding recess 1016 in the present application is smaller than the radial dimension of the connection protrusion 301, and the connection protrusion 301, the mating recess 1011, and the welding recess 1016 are concentrically arranged.

By making the radial dimension of the welding recess 1016 smaller than the radial dimension of the connection protrusion 301 and disposing the connection protrusion 301, the mating recess 1011, and the welding recess 1016 concentrically, it is possible to ensure that the welding region formed by the welding recess 1016 can always cover the overlapping region of the connection protrusion 301 and the welding recess 1016, and thus the welding quality can be ensured.

Preferably, the axial dimension of the connection protrusion 301 in the present application is the same as the axial dimension of the mating recess 1011, so that it can be ensured to some extent that the position of the positive electrode current collecting plate 3 except for the connection protrusion 301 can be sufficiently fitted to the end face of the main body portion 1012 of the end cap 101.

Optionally, as shown in fig. 1 and fig. 4, the center of the positive current collecting plate 3 in the present application is formed with a relief hole 302, a liquid injection hole 1014 is formed at a position of the main body 1012 corresponding to the relief hole 302, a reinforcing protrusion 1015 is formed at an edge of the main body 1012 facing one side of the positive current collecting plate 3 and located at the liquid injection hole 1014, and the reinforcing protrusion 1015 can be inserted into the relief hole 302.

It will be appreciated that, since the main body 1012 needs to be further provided with a stepped hole on a side facing away from the positive current collecting plate 3, and the stepped hole is used for installing the explosion-proof valve 6 and the protection sheet 7, the reinforcing protrusion 1015 is formed on a side of the end cover 101 facing toward the positive current collecting plate 3 and corresponding to the position of the liquid injection hole 1014, so that the end cover 101 can be reinforced to a certain extent, and the problem that the end cover 101 deforms in the liquid injection hole 1014 to cause liquid leakage is avoided.

Preferably, as shown in fig. 4, the size of the reinforcing protrusion 1015 in the axial direction in the present application is not greater than the size of the positive electrode current collecting plate 3 in the axial direction, and the diameter of the reinforcing protrusion 1015 is smaller than the diameter of the escape hole 302, so that it can be ensured that the reinforcing protrusion 1015 can be smoothly inserted into the injection hole 1014 at the time of assembly.

Optionally, as shown in fig. 5, the cylindrical battery provided by the utility model further comprises a negative electrode cover plate 4 assembly and a negative electrode current collecting disc; the negative electrode current collecting disc is connected with a negative electrode lug of the winding core 2, and the negative electrode cover plate 4 assembly is connected with the shell 1.

It is understood that the negative electrode cover plate 4 assembly in the present application includes a negative electrode cover plate 4 and a negative electrode post 5, the negative electrode post 5 is connected with a negative electrode current collecting plate, and one end of the negative electrode post 5 protrudes from one side of the negative electrode cover plate 4 facing away from the negative electrode current collecting plate.

The negative electrode cover plate 4 is connected with the negative electrode current collecting plate and with the shell 1, the negative electrode pole 5 is connected with the negative electrode current collecting plate, and one end of the negative electrode pole 5 passes through the negative electrode cover plate 4.

It should be noted that, in order to avoid the contact between the negative electrode post 5 and the negative electrode cover plate 4, an insulating member is disposed between the negative electrode post 5 and the negative electrode cover plate 4 in the present application, and the insulating member may be sleeved on the negative electrode post 5 to separate the negative electrode cover plate 4 and the negative electrode post 5, so as to avoid the negative electrode cover plate 4 from being negatively charged, which leads to the short circuit problem caused by the negative charge of the housing 1.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. The cylindrical battery is characterized by comprising a shell, a winding core and an anode current collecting disc;

one side of the positive electrode current collecting disc is connected with a positive electrode lug of the winding core, one side of the positive electrode current collecting disc, which is away from the positive electrode lug, is provided with a connecting convex part along the circumferential direction of the positive electrode current collecting disc, and the connecting convex part is positioned at the edge of the positive electrode current collecting disc;

the shell comprises an end cover, the end cover comprises a main body part and a matching concave part, the matching concave part is formed along the circumferential direction of the main body part and corresponds to the position of the connecting convex part, and the end face of the connecting convex part can be attached to the end face of the matching concave part, so that the main body part is attached to the positive electrode current collecting disc.

2. The cylindrical battery according to claim 1, wherein a welding recess is formed at a position corresponding to the mating recess on a side of the end cap facing away from the positive electrode current collecting plate, the welding recess being provided along a circumferential direction of the case.

3. The cylindrical battery according to claim 1, wherein a first inclined surface is formed at one side of the fitting recess portion, and a second inclined surface is formed at the connection protrusion portion corresponding to the first inclined surface.

4. The cylindrical battery of claim 1, wherein a radial dimension of the mating recess is greater than a radial dimension of the connecting protrusion.

5. The cylindrical battery according to claim 2, wherein the radial dimension of the welding recess is smaller than the radial dimension of the connecting protrusion, and the connecting protrusion, the fitting recess, and the welding recess are concentrically arranged.

6. The cylindrical battery according to claim 1, wherein an axial dimension of the connection protrusion is the same as an axial dimension of the mating recess.

7. The cylindrical battery according to claim 1, wherein an avoidance hole is formed in the center of the positive electrode current collecting plate, a liquid injection hole is formed in a position of the main body portion corresponding to the avoidance hole, a reinforcing protrusion is formed on a side of the main body portion facing the positive electrode current collecting plate and located at an edge of the liquid injection hole, and the reinforcing protrusion can be inserted into the avoidance hole.

8. The cylindrical battery according to claim 7, wherein a dimension of the reinforcing protrusion in the axial direction is not larger than a dimension of the positive electrode collector plate in the axial direction.

9. The cylindrical battery of claim 1, further comprising a negative cap plate assembly and a negative current collecting tray;

the negative electrode current collecting disc is connected with a negative electrode tab of the winding core, and the negative electrode cover plate assembly is connected with the shell.

10. The cylindrical battery of claim 9, wherein the negative cap assembly comprises a negative cap and a negative post, the negative post is connected to the negative current collecting plate, and an end of the negative post protrudes from a side of the negative cap facing away from the negative current collecting plate.