CN219203432U - Current collecting disc structure and cylindrical battery - Google Patents

Abstract

The utility model provides a current collecting disc structure and a cylindrical battery. The current collecting plate structure comprises a current collecting plate main body and a component to be bent. Wherein, the mass flow disc main body is used for welding in the roll core. The assembly to be bent comprises a first part to be bent, a first connecting part, a second part to be bent and a second connecting part, wherein the first part to be bent, the first connecting part, the second part to be bent and the second connecting part are sequentially connected, and the current collecting disc main body is connected to one side, away from the second part to be bent, of the second connecting part; the first connecting part is provided with a first bending groove, and the first part to be bent is used for bending along a first direction of the first bending groove when being assembled in the shell and is welded on the cover plate after bending; the second connecting part is provided with a second bending groove, and the second part to be bent is used for bending along the first direction of the second bending groove when being assembled in the shell. The current collecting disc structure enables the overall dimension of the cylindrical battery to be smaller, and meanwhile the overall structural strength is better.

Description

Current collecting disc structure and cylindrical battery

Technical Field

The utility model relates to the technical field of cylindrical batteries, in particular to a current collecting disc structure and a cylindrical battery.

Background

A cylindrical battery is a battery that can be used continuously by activating an active material by means of charging after the battery is discharged. The cylindrical battery is widely applied to the fields of solar lamps, lawn lamps, backup energy, electric tools, toy models, photovoltaic energy and the like. The cylindrical battery mainly comprises a cover plate, a current collecting disc structure, a winding core and the like, wherein the current collecting disc structure is respectively connected with the cover plate and the winding core.

In the prior art, the current collecting disc structure comprises a current collecting disc main body and a tail body, wherein the tail body is convexly arranged on the current collecting disc main body, the current collecting disc main body is used for being connected with the winding core, and the tail body is used for being connected with the cover plate. For example, a conventional current collecting plate structure such as chinese patent No. CN202221280316.7 proposes a current collecting plate and a pole piece of a cylindrical battery, wherein the pole piece of the corresponding current collecting plate structure includes a current collecting plate and a tab, the tab is connected to a plate body of the current collecting plate, and specifically, the tab is integrally connected to a plate body edge of the current collecting plate, so that the tab is convexly arranged on the current collecting plate.

However, since the tab is protruded from the current collecting plate, the space required for the connection structure between the current collecting plate and the tab is large. It can be understood that the current collecting disc is equivalent to the current collecting disc main body, the tab is equivalent to the tail body, and therefore the space occupied by the connection structure between the current collecting disc main body and the tail body is larger, the space occupied by the current collecting disc structure in the cylindrical battery is larger, and the overall dimension of the cylindrical battery is larger. In addition, the lug is protruding to locate the current collecting tray, and the lug is rectangular form individual layer structure, and the protruding current collecting tray main part of locating of tail body promptly, and the tail body is rectangular form individual layer structure for the moment of tail body is great, thereby makes the tail body break more easily, and then makes the overall structure intensity of current collecting tray structure relatively poor.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provides a current collecting disc structure and a cylindrical battery, which enable the overall dimension of the cylindrical battery to be smaller and the overall structural strength to be better.

The aim of the utility model is realized by the following technical scheme:

a current collecting tray structure comprising:

the collecting disc main body is used for being welded on the winding core; and

the assembly to be bent comprises a first part to be bent, a first connecting part, a second part to be bent and a second connecting part, wherein the first part to be bent, the first connecting part, the second part to be bent and the second connecting part are sequentially connected, and the current collecting disc main body is connected to one side, away from the second part to be bent, of the second connecting part; the first connecting part is provided with a first bending groove, and the first part to be bent is used for bending along a first direction of the first bending groove when being assembled in the shell and is welded to the cover plate after bending; the second connecting portion is provided with a second bending groove, and the second portion to be bent is used for being bent along the first direction of the second bending groove when being assembled in the shell.

In one embodiment, the current collecting plate structure is an integrally formed structure.

In one embodiment, the collecting tray body is formed with two welding grooves, and the two welding grooves are axially symmetrically distributed along the central axis of the collecting tray body.

In one embodiment, the cross section of each welding groove is U-shaped; and/or the number of the groups of groups,

the first bending groove is formed by punching or perforating, so that the thickness of the first connecting part is smaller than that of the first part to be bent; the second bending groove is formed by punching or punching, so that the thickness of the second connecting portion is smaller than that of the second portion to be bent.

The cylindrical battery comprises a shell, the winding core, the cover plate and the current collecting disc structure in any embodiment, wherein the shell is provided with a storage cavity, the winding core is positioned in the storage cavity and is connected with the shell, a part of the cover plate is positioned in the storage cavity and is welded with the shell, the current collecting disc structure is positioned between the cover plate and the winding core, the current collecting disc structure is also positioned in the storage cavity, the current collecting disc main body is welded to the winding core, a component to be bent is formed into a bending component through bending when the component to be bent is stored in the storage cavity, the bending component comprises a first bending part, a first connecting part, a second bending part and a second connecting part, the first bending part, the second bending part and the second connecting part are sequentially connected, and the current collecting disc main body is connected to one side of the second connecting part, which is away from the second bending part; the first bending part is bent along the first direction of the first bending groove when being assembled in the accommodating cavity, so that the first bending part is parallel to the collecting disc main body and is welded to the cover plate after being bent; the second bending part bends along the first direction of the second bending groove when being assembled in the accommodating cavity, so that the second bending part is parallel to the collecting disc main body, and the second bending part is positioned between the first bending part and the collecting disc main body.

In one embodiment, a first groove cavity is formed between the first bending portion and the second bending portion, and the first groove cavity is communicated with the first bending groove.

In one embodiment, a second groove cavity is formed between the second bending part and the collecting disc main body, the second groove cavity is communicated with the second bending groove, and the extending direction of the first groove cavity is parallel to the extending direction of the second groove cavity.

In one embodiment, a rounded corner is disposed on a side of the first bending portion facing away from the first connecting portion.

In one embodiment, the collecting tray structure in the accommodating cavity is in an S shape; and/or the number of the groups of groups,

the overall thickness of the collecting disc structure in the accommodating cavity is in the range of 0.3-0.8mm.

In one embodiment, the winding core is sleeved with the shell.

Compared with the prior art, the utility model has at least the following advantages:

1. the first connecting part is provided with a first bending groove, and the first part to be bent is used for bending along the first direction of the first bending groove when being assembled in the shell, so that the first part to be bent is bent when being assembled in the shell and is parallel to the collecting disc main body; the second connecting portion is formed with the second bending groove, the second portion of waiting to bend is used for bending along the first direction of second bending groove when assembling in the casing, so that the second portion of waiting to bend is accomplished when assembling in the casing and is parallel to each other with the mass flow disc main part, the second portion of waiting to bend after bending is located between the first portion of waiting to bend after bending and the mass flow disc main part, namely the first portion of waiting to bend after bending and the second portion of waiting to bend after bending are all located the top of mass flow disc main part, and the first portion of waiting to bend after bending and the second portion of waiting to bend after bending are parallel to each other with the mass flow disc main part, the first portion of waiting to bend after bending and the second portion of waiting to bend after bending can't bulge in the mass flow disc main part, even make the after bending wait to bend the subassembly unable bulge in the mass flow disc main part, make the space that the connection structure between the mass flow disc main part and the after bending need occupy less, thereby make the overall size of the required space that the mass flow disc structure occupies in the cylindrical battery less, and then make the overall size of cylindrical battery less.

2. The first part to be bent is used for bending along the first direction of the first bending groove when being assembled in the shell, so that the first part to be bent is bent when being assembled in the shell and is parallel to the collecting disc main body; the second part of waiting to bend is used for bending along the first direction of second bending groove when assembling in the casing to make the second part of waiting to bend accomplish when assembling in the casing and be parallel to each other with the mass flow disk main part, make the second after bending wait to bend between the first part of waiting after bending and the mass flow disk main part, even make after bending wait to bend the subassembly for the bilayer structure of range upon range of bending, and wait after bending to bend the subassembly unable protrusion in the mass flow disk main part, make after bending wait to bend the moment of subassembly less, thereby make after bending wait to bend the subassembly more difficult fracture get off, and then make the overall structure intensity of mass flow disk structure better.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a current collecting tray structure according to an embodiment;

fig. 2 is a schematic structural view of a cylindrical battery according to an embodiment;

FIG. 3 is a cross-sectional view taken along line A-A of the cylindrical battery shown in FIG. 2;

FIG. 4 is an enlarged schematic view of the cylindrical battery shown in FIG. 3 at B;

fig. 5 is a schematic structural view of the current collecting plate structure shown in fig. 1 after bending.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The utility model provides a current collecting disc structure which comprises a current collecting disc main body and a component to be bent. Wherein, the mass flow disc main body is used for welding in the roll core. The assembly to be bent comprises a first part to be bent, a first connecting part, a second part to be bent and a second connecting part, wherein the first part to be bent, the first connecting part, the second part to be bent and the second connecting part are sequentially connected, and the current collecting disc main body is connected to one side, away from the second part to be bent, of the second connecting part; the first connecting part is provided with a first bending groove, and the first part to be bent is used for bending along a first direction of the first bending groove when being assembled in the shell and is welded on the cover plate after bending; the second connecting part is provided with a second bending groove, and the second part to be bent is used for bending along the first direction of the second bending groove when being assembled in the shell.

In the collecting disc structure, the first connecting part is provided with the first bending groove, and the first part to be bent is used for bending along the first direction of the first bending groove when being assembled in the shell, so that the first part to be bent is bent when being assembled in the shell and is parallel to the collecting disc main body; the second connecting portion is formed with the second bending groove, the second portion of waiting to bend is used for bending along the first direction of second bending groove when assembling in the casing, so that the second portion of waiting to bend is accomplished when assembling in the casing and is parallel to each other with the mass flow disc main part, the second portion of waiting to bend after bending is located between the first portion of waiting to bend after bending and the mass flow disc main part, namely the first portion of waiting to bend after bending and the second portion of waiting to bend after bending are all located the top of mass flow disc main part, and the first portion of waiting to bend after bending and the second portion of waiting to bend after bending are parallel to each other with the mass flow disc main part, the first portion of waiting to bend after bending and the second portion of waiting to bend after bending can't bulge in the mass flow disc main part, even make the after bending wait to bend the subassembly unable bulge in the mass flow disc main part, make the space that the connection structure between the mass flow disc main part and the after bending need occupy less, thereby make the overall size of the required space that the mass flow disc structure occupies in the cylindrical battery less, and then make the overall size of cylindrical battery less. The first part to be bent is used for bending along the first direction of the first bending groove when being assembled in the shell, so that the first part to be bent is bent when being assembled in the shell and is parallel to the collecting disc main body; the second part of waiting to bend is used for bending along the first direction of second bending groove when assembling in the casing to make the second part of waiting to bend accomplish when assembling in the casing and be parallel to each other with the mass flow disk main part, make the second after bending wait to bend between the first part of waiting after bending and the mass flow disk main part, even make after bending wait to bend the subassembly for the bilayer structure of range upon range of bending, and wait after bending to bend the subassembly unable protrusion in the mass flow disk main part, make after bending wait to bend the moment of subassembly less, thereby make after bending wait to bend the subassembly more difficult fracture get off, and then make the overall structure intensity of mass flow disk structure better.

In order to better understand the technical scheme and beneficial effects of the present utility model, the following describes the present utility model in further detail with reference to specific embodiments:

as shown in fig. 1, a current collecting plate structure 100 of an embodiment includes a current collecting plate body 110 and a component 120 to be bent. Wherein, the collecting tray main body 110 is used for welding to the winding core 300. The to-be-bent assembly 120 includes a first to-be-bent portion 121, a first connecting portion 122, a second to-be-bent portion 123, and a second connecting portion 124, where the first to-be-bent portion 121, the first connecting portion 122, the second to-be-bent portion 123, and the second connecting portion 124 are sequentially connected, and the current collecting tray main body 110 is connected to one side of the second connecting portion 124 facing away from the second to-be-bent portion 123; the first connecting portion 122 is formed with a first bending groove 1221, and the first portion to be bent 121 is configured to be bent along a first direction of the first bending groove 1221 when assembled in the housing 200, and is configured to be welded to the cover plate 400 after being bent; the second connecting portion 124 is formed with a second bending groove 1241, and the second portion to be bent 123 is configured to be bent along the first direction of the second bending groove 1241 when assembled in the housing 200.

In the present embodiment, the bottom surface of the collecting tray body 110 is used for welding with the winding core 300. The first connecting portion 122 is formed with a first bending groove 1221, and the first portion to be bent 121 is configured to bend along a first direction of the first bending groove 1221 when assembled in the housing 200, so that the first portion to be bent 121 completes bending and is parallel to the current collecting tray main body 110 when assembled in the housing 200; the second connecting portion 124 is formed with a second bending groove 1241, and the second portion to be bent 123 is configured to be bent along a first direction of the second bending groove 1241 when assembled in the housing 200, so that the second portion to be bent 123 is bent and parallel to the current collecting tray main body 110 when assembled in the housing 200, so that the bent second portion to be bent 123 is located between the bent first portion to be bent 121 and the current collecting tray main body 110, that is, the bent first portion to be bent 121 and the bent second portion to be bent 123 are located above the current collecting tray main body 110, and the bent first portion to be bent 121 and the bent second portion to be bent 123 are parallel to the current collecting tray main body 110, so that the bent component to be bent 120 forms a stacked and bent double-layer structure.

In the above-mentioned current collecting plate structure 100, since the first connecting portion 122 is formed with the first bending groove 1221, the first portion to be bent 121 is configured to be bent along the first direction of the first bending groove 1221 when assembled in the housing 200, so that the first portion to be bent 121 is bent and parallel to the current collecting plate main body 110 when assembled in the housing 200; the second connecting portion 124 is formed with a second bending groove 1241, where the second portion to be bent 123 is used to bend along the first direction of the second bending groove 1241 when assembled in the housing 200, so that the second portion to be bent 123 is bent and is parallel to the current collecting disc main body 110 when assembled in the housing 200, so that the bent second portion to be bent 123 is located between the bent first portion to be bent 121 and the current collecting disc main body 110, that is, the bent first portion to be bent 121 and the bent second portion to be bent 123 are located above the current collecting disc main body 110, and the bent first portion to be bent 121 and the bent second portion to be bent 123 are parallel to the current collecting disc main body 110, so that the bent first portion to be bent 121 and the bent second portion to be bent 123 cannot protrude out of the current collecting disc main body 110, that is, the bent assembly 120 cannot protrude out of the current collecting disc main body 110, so that the space occupied by the connection structure between the bent assembly 120 and the bent assembly to be bent is smaller, and the whole volume of the current collecting disc structure 100 is smaller than the required by the cylindrical shape 10, and the overall size of the battery structure 10 is smaller. Since the first portion to be bent 121 is used for being bent along the first direction of the first bending groove 1221 when assembled in the housing 200, the first portion to be bent 121 is bent and parallel to the current collecting tray main body 110 when assembled in the housing 200; the second portion to be bent 123 is used for being bent along the first direction of the second bending groove 1241 when being assembled in the housing 200, so that the second portion to be bent 123 is bent and is parallel to the current collecting disc main body 110 when being assembled in the housing 200, the bent second portion to be bent 123 is located between the bent first portion to be bent 121 and the current collecting disc main body 110, namely, the bent component to be bent 120 is of a stacked and bent double-layer structure, the bent component to be bent 120 cannot be protruded out of the current collecting disc main body 110, the moment of the bent component to be bent 120 is small, the bent component to be bent 120 is difficult to break, and the overall structural strength of the current collecting disc structure 100 is good.

As shown in fig. 1, in one embodiment, the current collecting tray structure 100 is a one-piece structure; the collecting tray main body 110 is formed with two welding grooves 111, and the two welding grooves 111 are axially symmetrically distributed with the central axis of the collecting tray main body 110; the cross section of each welding groove 111 is U-shaped; the first bending groove 1221 is formed by punching or punching, so that the thickness of the first connecting portion 122 is smaller than the thickness of the first portion 121 to be bent; the second bending groove 1241 is formed by punching or forming, so that the thickness of the second connecting portion 124 is smaller than that of the second portion to be bent 123, so that the structural strength of the current collecting disc structure 100 is enhanced, and the structural stability of the current collecting disc structure 100 is better.

As shown in fig. 2 to 5, the present utility model further provides a cylindrical battery 10, including a housing 200, a winding core 300, a cover plate 400, and a current collecting disc structure 100 according to any of the foregoing embodiments, where the housing 200 is formed with a receiving cavity 210, the winding core 300 is located in the receiving cavity 210 and is connected to the housing 200, a portion of the cover plate 400 is located in the receiving cavity 210 and is welded to the housing 200, the current collecting disc structure 100 is located between the cover plate 400 and the winding core 300, and the current collecting disc structure 100 is also located in the receiving cavity 210, the current collecting disc main body 110 is welded to the winding core 300, the assembly 120 to be bent is formed into a bending assembly 130 after being bent when being received in the receiving cavity 210, the bending assembly 130 includes a first bending portion 131, a first connecting portion 122, a second bending portion 132, and a second connecting portion 124, and the first bending portion 131, the second connecting portion 122 and the second connecting portion 124 are sequentially connected, and the current collecting disc main body 110 is connected to a side of the second connecting portion 124 facing away from the second bending portion 132; the first bending part 131 is bent along the first direction of the first bending groove 1221 when being assembled in the receiving cavity 210, so that the first bending part 131 and the collecting tray main body 110 are parallel to each other, and welded to the cover plate 400 after being bent; when assembled in the receiving cavity 210, the second bending portion 132 bends along the first direction of the second bending groove 1241, so that the second bending portion 132 is parallel to the current collecting tray main body 110, and the second bending portion 132 is located between the first bending portion 131 and the current collecting tray main body 110.

In the present embodiment, the winding core 300 is welded to the bottom surface of the collecting tray body 110. The cover plate 400 is welded to the top surface of the first bending part 131. When the first bending part 131 is assembled in the accommodating cavity 210, the first bending part 131 bends along the first direction of the first bending groove 1221, so that the first bending part 131 and the collecting tray main body 110 are parallel to each other; the second bending portion 132 is bent along the first direction of the second bending groove 1241 when assembled in the accommodating cavity 210, so that the second bending portion 132 is parallel to the current collecting tray main body 110, the second bending portion 132 is located between the first bending portion 131 and the current collecting tray main body 110, that is, the first bending portion 131 and the second bending portion 132 are located above the current collecting tray main body 110, and the first bending portion 131 and the second bending portion 132 are parallel to the current collecting tray main body 110, so that the bending assembly 130 is formed into a stacked and bent double-layer structure.

As shown in fig. 3 to 5, in one embodiment, a first groove cavity 1311 is formed between the first bending part 131 and the second bending part 132, and the first groove cavity 1311 communicates with the first bending groove 1221; a second slot cavity 1321 is formed between the second bending part 132 and the current collecting plate main body 110, the second slot cavity 1321 is communicated with a second bending slot 1241, and the extending direction of the first slot cavity 1311 is parallel to the extending direction of the second slot cavity 1321; the side of the first bending part 131 facing away from the first connecting part 122 is provided with a fillet 1312; the collecting tray structure 100 in the accommodating cavity 210 is S-shaped; the overall thickness of the manifold structure 100 within the receiving cavity 210 ranges from 0.3 mm to 0.8mm; the winding core 300 is sleeved with the shell 200, so that the structural strength of the cylindrical battery 10 is enhanced, and the structural stability of the cylindrical battery 10 is better.

Compared with the prior art, the utility model has at least the following advantages:

1. since the first connecting portion 122 is formed with the first bending groove 1221, the first portion to be bent 121 is configured to be bent along the first direction of the first bending groove 1221 when assembled in the case 200, so that the first portion to be bent 121 is bent and parallel to the current collecting tray main body 110 when assembled in the case 200; the second connecting portion 124 is formed with a second bending groove 1241, where the second portion to be bent 123 is used to bend along the first direction of the second bending groove 1241 when assembled in the housing 200, so that the second portion to be bent 123 is bent and is parallel to the current collecting disc main body 110 when assembled in the housing 200, so that the bent second portion to be bent 123 is located between the bent first portion to be bent 121 and the current collecting disc main body 110, that is, the bent first portion to be bent 121 and the bent second portion to be bent 123 are located above the current collecting disc main body 110, and the bent first portion to be bent 121 and the bent second portion to be bent 123 are parallel to the current collecting disc main body 110, so that the bent first portion to be bent 121 and the bent second portion to be bent 123 cannot protrude out of the current collecting disc main body 110, that is, the bent assembly 120 cannot protrude out of the current collecting disc main body 110, so that the space occupied by the connection structure between the bent assembly 120 and the bent assembly to be bent is smaller, and the whole volume of the current collecting disc structure 100 is smaller than the required by the cylindrical shape 10, and the overall size of the battery structure 10 is smaller.

2. Since the first portion to be bent 121 is used for being bent along the first direction of the first bending groove 1221 when assembled in the housing 200, the first portion to be bent 121 is bent and parallel to the current collecting tray main body 110 when assembled in the housing 200; the second portion to be bent 123 is used for being bent along the first direction of the second bending groove 1241 when being assembled in the housing 200, so that the second portion to be bent 123 is bent and is parallel to the current collecting disc main body 110 when being assembled in the housing 200, the bent second portion to be bent 123 is located between the bent first portion to be bent 121 and the current collecting disc main body 110, namely, the bent component to be bent 120 is of a stacked and bent double-layer structure, the bent component to be bent 120 cannot be protruded out of the current collecting disc main body 110, the moment of the bent component to be bent 120 is small, the bent component to be bent 120 is difficult to break, and the overall structural strength of the current collecting disc structure 100 is good.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A current collecting tray structure, comprising:

the collecting disc main body is used for being welded on the winding core; and

the assembly to be bent comprises a first part to be bent, a first connecting part, a second part to be bent and a second connecting part, wherein the first part to be bent, the first connecting part, the second part to be bent and the second connecting part are sequentially connected, and the current collecting disc main body is connected to one side, away from the second part to be bent, of the second connecting part; the first connecting part is provided with a first bending groove, and the first part to be bent is used for bending along a first direction of the first bending groove when being assembled in the shell and is welded to the cover plate after bending; the second connecting portion is provided with a second bending groove, and the second portion to be bent is used for being bent along the first direction of the second bending groove when being assembled in the shell.

2. The header disk structure of claim 1, wherein said header disk structure is an integrally formed structure.

3. The current collecting tray structure according to claim 1, wherein the current collecting tray body is formed with two welding grooves, and the two welding grooves are axisymmetrically distributed with respect to a central axis of the current collecting tray body.

4. A current collecting tray structure according to claim 3, wherein each of said welding grooves has a U-shaped cross section; and/or the number of the groups of groups,

the first bending groove is formed by punching or perforating, so that the thickness of the first connecting part is smaller than that of the first part to be bent; the second bending groove is formed by punching or punching, so that the thickness of the second connecting portion is smaller than that of the second portion to be bent.

5. A cylindrical battery, characterized by comprising a shell, the winding core, the cover plate and the current collecting disc structure according to any one of claims 1 to 4, wherein the shell is provided with a storage cavity, the winding core is positioned in the storage cavity and is connected with the shell, a part of the cover plate is positioned in the storage cavity and is welded with the shell, the current collecting disc structure is positioned between the cover plate and the winding core, the current collecting disc structure is also positioned in the storage cavity, the current collecting disc main body is welded to the winding core, the to-be-bent assembly is formed into a bent assembly through bending when being stored in the storage cavity, and the bent assembly comprises a first bent part, a first connecting part, a second bent part and a second connecting part, wherein the first bent part, the first connecting part, the second bent part and the second connecting part are sequentially connected, and the current collecting disc main body is connected to one side of the second connecting part, which is away from the second bent part; the first bending part is bent along the first direction of the first bending groove when being assembled in the accommodating cavity, so that the first bending part is parallel to the collecting disc main body and is welded to the cover plate after being bent; the second bending part bends along the first direction of the second bending groove when being assembled in the accommodating cavity, so that the second bending part is parallel to the collecting disc main body, and the second bending part is positioned between the first bending part and the collecting disc main body.

6. The cylindrical battery according to claim 5, wherein a first groove cavity is formed between the first bent portion and the second bent portion, and the first groove cavity communicates with the first bending groove.

7. The cylindrical battery according to claim 6, wherein a second groove cavity is formed between the second bending portion and the current collecting plate body, the second groove cavity is communicated with the second bending groove, and the extending direction of the first groove cavity is parallel to the extending direction of the second groove cavity.

8. The cylindrical battery according to claim 5, wherein a side of the first bending portion facing away from the first connecting portion is provided with a rounded corner.

9. The cylindrical battery of claim 5, wherein the current collecting plate structure in the receiving chamber is S-shaped; and/or the number of the groups of groups,

the overall thickness of the collecting disc structure in the accommodating cavity is in the range of 0.3-0.8mm.

10. The cylindrical battery of claim 5, wherein the winding core is sleeved with the housing.

Images