CN220400853U

CN220400853U - Current collecting disc assembly for cylindrical battery and cylindrical battery

Info

Publication number: CN220400853U
Application number: CN202321603829.1U
Authority: CN
Inventors: 徐雨
Original assignee: Weilai Battery Technology Anhui Co ltd
Current assignee: Weilai Battery Technology Anhui Co ltd
Priority date: 2023-06-20
Filing date: 2023-06-20
Publication date: 2024-01-26
Anticipated expiration: 2033-06-20

Abstract

The utility model relates to the technical field of batteries, in particular to a current collecting disc assembly for a cylindrical battery and the cylindrical battery, and aims to solve the problem that an electric core of the conventional cylindrical battery is easy to eccentric. To this end, the current collecting plate assembly of the present utility model comprises: a collecting tray body; the at least two positioning structures are connected with the collecting plate body and distributed at intervals along the circumferential direction of the collecting plate body. According to the utility model, through the arrangement of the plurality of positioning structures, when the whole body formed by the battery cell and the current collecting disc body enters the shell, the battery cell can be accurately positioned, and the battery cell is prevented from being offset or eccentric.

Description

Current collecting disc assembly for cylindrical battery and cylindrical battery

Technical Field

The utility model relates to the technical field of batteries, and particularly provides a current collecting disc assembly for a cylindrical battery and the cylindrical battery.

Background

The lithium ion battery (commonly called as a lithium battery) is a secondary battery using a lithium ion intercalation compound as a positive electrode material, and has the advantages of small volume, large capacity, long service life, low self-discharge rate, no memory effect, environmental protection and the like. Therefore, lithium batteries are increasingly used.

According to different shapes, lithium batteries can be classified into various types such as prismatic batteries, cylindrical batteries, soft-pack batteries, button batteries, and the like. Wherein the cylindrical battery includes a generally cylindrical housing and an electrical cell disposed within the housing. The battery cell is formed by winding a positive plate, a negative plate and a diaphragm arranged between the positive plate and the negative plate. The positive plate is provided with a positive lug, and the negative plate is provided with a negative lug. The positive and negative lugs are respectively connected with the positive and negative ends at the two ends of the cylindrical battery through the current collecting disc.

The design of the current collecting disc of the cylindrical battery in the prior art is smaller than the battery cell, the outer diameter of the battery cell is smaller than the inner diameter of the shell, the battery cell can be eccentric after entering the shell, namely, gaps exist between the battery cell and the side wall of the shell, the gaps are uneven, if the battery cell is eccentric, after liquid is injected into the battery cell, the battery cell can expand, the eccentric expansion force between different positions of the battery cell and the shell is different, the lithium is directly separated from the battery cell after circulation, water is jumped, the circulation performance is reduced, and the service life of the whole battery is shortened.

In summary, the battery core of the conventional cylindrical battery is easy to be eccentric during installation, so that problems of lithium precipitation, water jump, cycle performance reduction and the like are easily caused.

Accordingly, there is a need in the art for a new current collecting tray assembly for a cylindrical battery and a cylindrical battery to solve the above-mentioned problems.

Disclosure of Invention

The utility model aims to solve the technical problem that the battery core of the conventional cylindrical battery is easy to eccentric.

In a first aspect, the present utility model provides a current collecting tray assembly for a battery comprising:

a collecting tray body;

the at least two positioning structures are connected with the collecting disc body and distributed at intervals along the circumferential direction of the collecting disc body.

In the preferred technical scheme of the current collecting disc assembly, the current collecting disc body is provided with a step part, and the positioning structure is connected with the current collecting disc body through the step part.

In the preferred technical scheme of the current collecting disc assembly, the step part is provided with a first connecting member, the positioning structure is provided with a second connecting member, and the step part is connected with the positioning structure through the first connecting member and the second connecting member.

In the preferred technical scheme of the current collecting disc assembly, the second connecting member comprises a first connecting portion and a clamping portion which are connected with each other, the first connecting member is a clamping hole formed in the step portion, and the clamping portion is clamped with the clamping hole.

In the preferred technical scheme of the current collecting disc assembly, the second connecting member comprises a first connecting portion, a second connecting portion and a clamping portion, the clamping portion is connected with one of the first connecting portion and the second connecting portion, the first connecting member is a clamping hole arranged on the step portion, the clamping portion is clamped with the clamping hole, and the first connecting portion and the second connecting portion are respectively located on the upper side and the lower side of the step portion.

In the preferred technical scheme of the collecting tray assembly, the positioning structure is provided with a guide structure, and the cross-sectional area of the guide structure gradually becomes smaller along the axis of the collecting tray body from bottom to top.

In the preferred technical scheme of the collecting disc assembly, one surface of the positioning structure, which is far away from the center of the collecting disc body in the radial direction of the collecting disc body, is an arc surface, and the range of a central angle corresponding to the arc of the arc surface is 5 degrees to (360/n) °

Where n is the number of positioning structures.

In a second aspect, the present utility model also provides a cylindrical battery comprising a current collecting plate assembly according to any one of the above preferred embodiments, the cylindrical battery further comprising a tab, a cell and a housing,

the current collecting disc assembly and the battery cell are both arranged in the shell,

the current collecting disc assembly is arranged at one end of the battery cell and is connected with the battery cell through the electrode lug.

In the preferable technical scheme of the cylindrical battery, the current collecting disc body is connected with the positioning structure through a first connecting member and a second connecting member, one surface of the current collecting disc body, which is close to the battery cell, is a first surface, one surface of the second connecting member, which is close to the battery cell, is a second surface, one surface of the battery cell, which is close to the current collecting disc body, is a battery cell end surface,

the distance between the first surface and the end surface of the battery cell is smaller than the distance between the second surface and the end surface of the battery cell.

In the preferred technical solution of the cylindrical battery, the positioning structure is provided with an end portion, and the end portion is located between the housing and the tab.

In the preferable technical scheme of the cylindrical battery, one surface of the current collecting plate body close to the battery cell is a first surface, one surface of the end part, which faces the battery cell in the axial direction of the battery cell, is a third surface,

the distance between the first surface and the third surface is larger than or equal to the thickness of the tab after compaction.

In the case of adopting the above technical solution, the current collecting plate assembly of the present utility model includes: a collecting tray body; the at least two positioning structures are connected with the collecting plate body and distributed at intervals along the circumferential direction of the collecting plate body. According to the utility model, through the arrangement of the plurality of positioning structures, when the whole formed by the battery cell and the current collecting disc enters the shell, the battery cell can be accurately positioned, and the battery cell is prevented from being offset or eccentric.

Scheme 1. A current collecting tray assembly for a cylindrical battery,

it is characterized in that the method comprises the steps of,

the current collecting plate assembly includes:

a collecting tray body;

The current collecting disc assembly according to the scheme 2 is characterized in that a step part is arranged on the current collecting disc body, and the positioning structure is connected with the current collecting disc body through the step part.

The current collecting plate assembly according to claim 2, wherein the step portion is provided with a first connecting member, the positioning structure is provided with a second connecting member, and the step portion and the positioning structure are connected through the first connecting member and the second connecting member.

The current collecting tray assembly according to claim 3, wherein the second connecting member includes a first connecting portion and a clamping portion connected to each other, the first connecting member is a clamping hole provided on the step portion, and the clamping portion is clamped with the clamping hole.

The current collecting disc assembly according to the scheme 5 is characterized in that the second connecting member comprises a first connecting portion, a second connecting portion and a clamping portion, the clamping portion is connected with one of the first connecting portion and the second connecting portion, the first connecting member is a clamping hole formed in the step portion, the clamping portion is clamped with the clamping hole, and the first connecting portion and the second connecting portion are located on the upper side and the lower side of the step portion respectively.

The collecting tray assembly according to claim 1, wherein the positioning structure is provided with a guiding structure, and the cross-sectional area of the guiding structure gradually decreases along the axis of the collecting tray body from bottom to top.

The collecting tray assembly according to any one of claims 1 to 6, wherein a surface of the positioning structure, which is far away from the center of the collecting tray body in the radial direction of the collecting tray body, is an arc surface, and a central angle corresponding to an arc of the arc surface ranges from 5 degrees to (360/n) °

Where n is the number of positioning structures.

A cylindrical battery comprising the current collecting plate assembly according to any one of aspects 1 to 7, further comprising a tab, an electric core, and a case,

The cylindrical battery according to the scheme 9, characterized in that the current collecting plate body and the positioning structure are connected by a first connecting member and a second connecting member, a surface of the current collecting plate body close to the battery cell is a first surface, a surface of the second connecting member close to the battery cell is a second surface, a surface of the battery cell close to the current collecting plate body is a battery cell end surface,

The cylindrical battery according to claim 8, wherein the positioning structure is provided with an end portion, and the end portion is located between the case and the tab.

The cylindrical battery according to claim 10, wherein a side of the current collecting plate body adjacent to the battery cell is a first side, a side of the end portion facing the battery cell in the axial direction of the battery cell is a third side,

Drawings

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings, in which:

fig. 1 is a partial structural sectional view of a battery of the present utility model;

FIG. 2 is a block diagram of a header disk assembly of a first preferred embodiment of the present utility model;

fig. 3 is another view perspective block diagram of a current collecting plate assembly according to a first preferred embodiment of the present utility model;

fig. 4 is a structural view of the current collecting plate body of the present utility model;

fig. 5 is a partial structural cross-sectional view of a current collecting plate assembly according to a first preferred embodiment of the present utility model;

fig. 6 is a partial structural cross-sectional view of a current collecting plate assembly according to a second preferred embodiment of the present utility model;

fig. 7 is a partial structural cross-sectional view of a current collecting plate assembly according to a third preferred embodiment of the present utility model;

FIG. 8 is a block diagram of a positioning structure of a first preferred embodiment of the present utility model;

FIG. 9 is a block diagram of a positioning structure of a second preferred embodiment of the present utility model;

reference numerals:

1. a collecting tray body; 11. a step portion; 111. a first connecting member; 1111. a clamping hole; 1112. a connection port; 2. a positioning structure; 21. a second connecting member; 211. a first connection portion; 212. a clamping part; 2121. a transition structure; 213. a second connecting portion; 22. an end portion; 23. a guide structure; 3. a battery cell; 31. a tab; 4. a housing.

Detailed Description

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model. For example, the present utility model does not limit the specific type of the vehicle to which the battery is applied, and a person skilled in the art can set the specific type of the vehicle according to the actual use requirement, for example, the vehicle can be a sedan type, an SUV type, or other types of vehicles, which is not limited. Those skilled in the art can adapt it as desired to suit a particular application.

It should be noted that, in the description of the present utility model, terms such as "inner", "outer", "upper", "lower", "left", "right", and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the term "connected" should be interpreted broadly, and for example, it may be a fixed connection or a detachable connection; 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 can be understood by those skilled in the art according to the specific circumstances.

Referring to fig. 1 to 4, as shown in fig. 1 to 4, the battery includes a housing 4, a battery core 3 and a current collecting disc body 1, the battery core 3 and the current collecting disc body 1 are all disposed in the housing 4, and the battery core 3 and the current collecting disc body 1 are connected through a tab 31;

the current collecting plate assembly of the present utility model comprises: a collecting tray body 1; at least two location structures 2, at least two location structures 2 are connected with mass flow disk body 1, and along the circumference interval distribution of mass flow disk body 1, a plurality of location structures 2 set up to can restrict the removal of electric core 3 under the condition that the battery is assembled in place.

Specifically, in the first preferred embodiment of the current collecting plate assembly, the current collecting plate body 1 is of a circular plate-shaped structure, the number of the positioning structures 2 is two, and the two positioning structures 2 are oppositely arranged on the current collecting plate body 1, namely, the two positioning structures 2 are arranged around the circumference of the current collecting plate body 1, and the connecting line of the two positioning structures 2 passes through the center of the current collecting plate body 1, when the battery is assembled in place, the directions shown in fig. 1 are taken as reference directions, the two positioning structures 2 are abutted with the inner walls of the shell 4 in the left-right direction, and the positioning structures 2 are indirectly connected with the battery core 3 due to the fact that the positioning structures 2 are connected with the current collecting plate body 1, the current collecting plate body 1 and the battery core 3 are welded, and the two positioning structures 2 are abutted with the inner walls of the shell 4 at opposite ends, so that the outer diameter of the current collecting plate assembly is identical to or close to the inner diameter of the shell 4, and the battery core 3 is prevented from being eccentric or offset.

It should be noted that the present utility model does not limit the specific number and the specific distribution manner of the positioning structures 2, for example, the number of the positioning structures 2 is three, the three positioning structures 2 are circumferentially arranged around the current collecting disc body 1, and the three positioning structures 2 are uniformly distributed, or any two connecting lines of the three positioning structures 2 pass through the center of the current collecting disc body 1, and the remaining one can be arbitrarily arranged, or the number of the positioning structures 2 can be four, five or other numerical values, which can be set by a person skilled in the art according to the actual situation.

As will be appreciated by those skilled in the art, with the direction shown in fig. 1 as a reference direction, the positioning structure 2 is abutted only against the inner wall of the housing 4 in the left-right direction in the case where the battery is assembled in place; the outer diameter of the current collecting disc assembly formed by the plurality of positioning structures 2 and the current collecting disc body 1 is slightly smaller than the inner diameter of the shell 4, but under the condition that the two values are close, and under the condition that the battery is assembled in place, gaps are formed between the positioning structures 2 and the side walls of the shell 4, but the gaps between the positioning structures 2 and the side walls of the shell 4 are smaller than the gaps between the battery cells 3 and the side walls of the shell 4, based on the gaps, the offset of the battery cells 3 and the shell 4 is reduced, so that the offset of the battery cells 3 is within an allowable error range, the problems of lithium precipitation, water jump, cycle performance reduction and the like caused by excessive offset of the battery cells 3 can still be avoided, or the positioning structures 2 are only connected with the top wall of the shell 4, namely, the top wall of the shell 4 is provided with a containing groove (not shown in the drawing), the containing groove is matched with the positioning structures 2, and the battery cells 3 can still be prevented from being offset or eccentric; the positioning structure may also be abutted against the inner wall of the housing 4 in the left-right direction, and simultaneously abutted against the top wall of the housing 4, which can be set by a person skilled in the art according to actual conditions.

Furthermore, in the first preferred example, the current collecting tray body 1 is provided with a stepped portion 11, and the positioning structure 2 is connected to the current collecting tray body 1 through the stepped portion 11. Specifically, the step part 11 is of a circular ring-shaped structure and is positioned on the outer side of the current collecting disc body 1, the connection between the current collecting disc body 1 and the positioning structure 2 is realized through the step part 11, the direct connection between the positioning structure 2 and the current collecting disc body 1 is avoided, the welding area of the lug 31 is reduced, the welding area of the lug 31 can be ensured through the step part 11, and the connection between the current collecting disc body 1 and the positioning structure 2 is facilitated.

It should be noted that, the specific structure and the specific number of the step portions 11 are not limited in the present utility model, for example, the shape of the step portions 11 is not circular, the shape of the step portions 11 is matched with the positioning structure 2, the step portions 11 are arc-shaped, and the step portions 11 are disposed around the current collecting tray body 1, and the number of the step portions is the same as that of the positioning structure 2, so that those skilled in the art can set the step portions according to the actual situation.

Referring next to fig. 4 and 5, as shown in fig. 4 and 5, the step 11 is provided with a first connection member 111, the positioning structure 2 is provided with a second connection member 21, and the step 11 and the positioning structure 2 are connected by the first connection member 111 and the second connection member 21.

Specifically, the first connection member 111 includes a clamping hole 1111 and a connection port 1112, the second connection member 21 includes a first connection portion 211 and a clamping portion 212, and when the current collecting tray body 1 and the positioning structure 2 are connected in place, the clamping portion 212 is clamped into the clamping hole 1111, and the connection port 1112 is provided to facilitate the clamping portion 212 to be clamped into the clamping hole 1111 from the connection port 1112. Of course, this is only a preferred arrangement, and the first connecting member 111 may be only the engaging hole 1111 formed in the step portion 11, the second connecting member 21 may be only the engaging structure formed in the positioning structure 2, or the first connecting member 111 may be the engaging structure formed in the step portion 11, and the second connecting member 21 may be the engaging hole formed in the positioning structure 2, which may be set by a person skilled in the art according to practical circumstances.

In another preferred embodiment, the first connection member 111 is directly provided on the current collecting tray body 1 without providing the stepped portion 11 on the current collecting tray body 1.

Referring next to fig. 1, 5 and 6, the current collecting tray assemblies of the first and second preferred embodiments have the first connection portion 211 located at a side of the step portion 11 away from the battery cell 3, i.e., the first connection portion 211 located above the step portion 11 and the clamping portion 212 located below the step portion 11, in the assembled state of the battery; in the current collecting plate assembly of the second preferred embodiment, the difference from the current collecting plate assembly of the first preferred embodiment is that the fastening portion 212 is provided with a transition structure 2121, and the transition structure 2121 is rounded or chamfered, so that the fastening portion 212 is conveniently fastened into the fastening hole 1111.

Referring next to fig. 7, as a current collecting tray assembly of the third preferred embodiment, a current collecting tray assembly of the second preferred embodiment is different from the current collecting tray assembly of the second preferred embodiment in that the first connection portion 211 is located at a side of the step portion 11 near the battery cell 3, that is, the first connection portion 211 is located below the step portion 11, and the clamping portion 212 is located above the step portion 11.

The first preferred embodiment and the second preferred embodiment of the current collecting plate assembly are assembled by connecting the positioning structure 2 to the current collecting plate body 1 from top to bottom, and the third preferred embodiment of the current collecting plate assembly is assembled by connecting the positioning structure 2 to the current collecting plate body 1 from bottom to top.

With continued reference to fig. 1, 5 and 6, in the current collecting disc assembly of the first preferred embodiment and the second preferred embodiment, the side of the current collecting disc body 1 adjacent to the battery core 3 is the first side a, that is, the lower surface of the current collecting disc body 1 is the first side a, the side of the second connecting member 21 adjacent to the battery core 3 is the second side B1, that is, the lower surface of the clamping portion 212 is the second side B1, the side of the battery core 3 adjacent to the current collecting disc body 1 is the battery core end surface D, that is, the distance between the first side a and the battery core end surface D is smaller than the distance between the second side B1 and the battery core end surface D, that is, the second side B1 is higher than the first side a in the case of assembling the battery, and based on the above structure arrangement, when the positioning structure 2 and the current collecting disc body 1 are connected in place, the whole body 1 is welded with the tab 31 in preference to the second connecting member 21, the tab 31 is contacted with the current collecting disc body 1, and no gap between the current collecting disc 1 and the tab 31 is caused by the contact of the lower surface of the second connecting member 21 with the current collecting disc body 1.

Referring next to fig. 7, in the current collecting plate assembly of the third preferred embodiment, as shown in fig. 7, the lower surface of the first connection portion 211 is a second surface B2, and the distance between the first surface a and the end surface D of the battery is smaller than the distance between the second surface B2 and the end surface D of the battery, i.e., the second surface B2 is higher than the first surface a in the case of assembling the battery in place, which is similar to the first preferred embodiment and the second preferred embodiment, so that the current collecting plate body 1 and the tab 31 are prevented from being welded in place and from being subjected to cold welding.

Further, the height of the step 11 is higher than the position of the current collecting tray body 1 to satisfy that the second surface B1 or the second surface B2 is higher than the first surface a, which is only a preferred arrangement, however, it is also possible that the thickness of the step 11 in the up-down direction is smaller than the thickness of the current collecting tray body 1 with the direction shown in fig. 1 as a reference direction, and the lower surface of the step 11 is higher than the lower surface of the current collecting tray body 1, meanwhile, the distance between the lower surface of the step 11 and the lower surface of the current collecting tray body 1 is greater than the thickness of the first connecting portion 211 or the clamping portion 212, and it is also possible that the current collecting tray body 1 is arranged to be capable of completely covering the end surface a of the battery cell in order to avoid the cold joint, and a person skilled in the art can set by himself according to the actual situation.

Further, in the present utility model, the positioning structure 2 is provided with an end 22, and the end 22 is located between the case 4 and the tab 31 in the state where the battery is assembled in place. The plurality of locating structures 2 are provided with the plurality of end parts 22, and the plurality of locating structures 2 are arranged around the current collecting disc body 1, so the plurality of end parts 22 are arranged around the electrode lugs 31 and used for isolating the electrode lugs 31 from the shell 4, so that the electrode lugs 31 and the shell 4 can be prevented from being contacted, the two are prevented from being electrically connected, and the battery is further prevented from being short-circuited.

With continued reference to fig. 1, the side of the end 22 facing the battery cell 3 in the axial direction of the battery cell 3 is a third side C, that is, the lower surface of the end 22 is a third side C, and the distance between the first side a and the third side C is greater than the thickness of the tab 31 after compaction. Accordingly, the third surface C is always located below the tab 31 in the vertical direction, and completely blocks the tab 31 and the case 4.

It is also possible that the distance between the first face a and the third face C is equal to the thickness of the tab 31 after compaction.

In addition, in the present utility model, a surface of the positioning structure 2, which is far from the center of the current collecting tray body 1 in the radial direction of the current collecting tray body 1, is an arc surface E, that is, a contact surface of the positioning structure 2 and the housing 4 is an arc surface E, and a central angle corresponding to an arc of the arc surface E (hereinafter, collectively referred to as a central angle of the positioning structure 2) ranges from 5 ° to (360/n) °, where n is the number of the positioning structures 2. Specifically, fig. 8 shows a single positioning structure 2, where the central angle R of the single positioning structure 2 is 5 ° at a minimum, if the number of positioning structures 2 is two, the central angle 2R of the two positioning structures 2 is 180 ° at a maximum, if the number of positioning structures 2 is three, the central angle 3R of the three positioning structures 2 is 120 ° at a maximum, if the number of positioning structures 2 is four, the central angle 4R of the four positioning structures 2 is 90 ° at a maximum, based on which, when the central angle of the positioning structure 2 is selected to be the maximum central angle, the plurality of positioning structures 2 can surround the current collecting tray body 1 by one circle, and no connection collision occurs between the adjacent two positioning structures 2.

It should be noted that, the central angles of the positioning structures 2 may be different, for example, the central angles of the positioning structures 2 are R1, R2, and R3 respectively, and the values of R1, R2, and R3 respectively, and the sum of R1, R2, and R3 respectively, may be different, so long as the sum of R1, R2, and R3 is within a range of 5 ° to (360/n) °, and those skilled in the art can set the values according to the actual situation.

Referring next to fig. 2 and 8, with the direction shown in fig. 8 as a reference direction, the first connection portion 211 extends from the left side to the right side of the positioning structure 2, and when the positioning structure 2 is connected to the current collecting tray body 1, the first connection portion 211 abuts against the step portion 11, which is a preferred arrangement, however, it is also possible to apply an electrolyte-proof glue on the first connection portion 211, and the first connection portion 211 and the step portion 11 are bonded, in which case the clamping portion 212 may not be provided.

Referring next to fig. 9, as a third preferred embodiment of the positioning structure, as shown in fig. 9, the second connection member 21 includes a first connection portion 211, a second connection portion 213, and a clamping portion 212, the clamping portion 212 being connected to one of the first connection portion 211 and the second connection portion 213, the first connection member 111 being a clamping hole 1111 provided on the stepped portion 11; with the battery assembled in place, the clamping portion 212 and the clamping hole 1111 are clamped, and the first connecting portion 211 and the second connecting portion 213 are located on the upper and lower sides of the stepped portion 11, respectively.

In another preferred embodiment, the first connection portion 211 and the second connection portion 213 are connected to the clamping portion 212, in which case, as shown in fig. 4, the clamping portion 212 is clamped into the clamping hole 1111 through the connecting port 1112 to realize connection of the positioning structure 2 and the current collecting tray body 1, and the first connection portion 211 and the second connection portion 213 are connected to the clamping portion 212, so that the structural strength of the positioning structure 2 can be improved, and the overall stability of the current collecting tray assembly can be improved.

It should be noted that, the present utility model does not limit the connection manner of the positioning structure 2 and the current collecting disc body 1, and the positioning structure and the current collecting disc body can be connected through the step part 11 or directly connected; can be connected in a clamping way or in an adhesive way, and can be set by a person skilled in the art according to actual conditions.

Further, the positioning structure 2 is provided with a guide structure 23, and the cross-sectional area of the guide structure 23 gradually decreases from the bottom to the top along the axis of the collecting tray body 1. Specifically, the guiding structure 23 is a chamfer structure or a round corner structure arranged on the positioning structure 2, and the guiding structure 23 plays a guiding role when the battery cell 3 enters the shell 4, so that the battery cell 3 cannot scratch the shell 4, and the battery cell 3 can quickly enter the shell 4.

It should be noted that, the electrical properties of the current collecting disc body 1 and the tab 31 are not limited in the present utility model, the tab 31 may be a negative tab or a positive tab, and correspondingly, the current collecting disc body 1 may be positively charged or negatively charged, which can be set by a person skilled in the art according to the actual situation.

The positioning structure 2 of the present utility model is made of insulating material, preferably insulating plastic, which is only a preferred arrangement, but may be made of insulating rubber, insulating composite product, or other insulating material, and can be set by those skilled in the art according to practical situations.

In a second aspect, the utility model also claims a cylindrical battery comprising a current collecting tray assembly as described in any one of the above preferred embodiments.

Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.

Claims

1. A current collecting disc assembly for a cylindrical battery,

it is characterized in that the method comprises the steps of,

the current collecting plate assembly includes:

a collecting tray body;

2. The manifold disc assembly of claim 1, wherein the manifold disc body is provided with a step portion, and the positioning structure is connected to the manifold disc body by the step portion.

3. The current collecting tray assembly according to claim 2, wherein a first connecting member is provided on the stepped portion, a second connecting member is provided on the positioning structure, and the stepped portion and the positioning structure are connected by the first connecting member and the second connecting member.

4. The current collecting tray assembly according to claim 3, wherein the second connecting member includes a first connecting portion and a clamping portion connected to each other, the first connecting member being a clamping hole provided on the stepped portion, the clamping portion being clamped to the clamping hole.

5. The current collecting tray assembly according to claim 3, wherein the second connecting member includes a first connecting portion, a second connecting portion and a clamping portion, the clamping portion is connected with one of the first connecting portion and the second connecting portion, the first connecting member is a clamping hole provided on the step portion, the clamping portion and the clamping hole are clamped, and the first connecting portion and the second connecting portion are located on upper and lower sides of the step portion, respectively.

6. The manifold disc assembly of claim 1, wherein the locating structure is provided with a guide structure having a cross-sectional area that tapers in a downward-to-upward direction along the axis of the manifold disc body.

7. The collecting tray assembly according to any one of claims 1 to 6, wherein a surface of the positioning structure, which is far from the center of the collecting tray body in the radial direction of the collecting tray body, is an arc surface, and a central angle corresponding to an arc of the arc surface ranges from 5 ° to (360/n) °

Where n is the number of positioning structures.

8. A cylindrical battery comprising the current collecting plate assembly according to any one of claims 1 to 7, further comprising a tab, an electric core and a case,

9. The cylindrical battery according to claim 8, wherein the current collecting plate body and the positioning structure are connected by a first connecting member and a second connecting member, a face of the current collecting plate body adjacent to the electric core is a first face, a face of the second connecting member adjacent to the electric core is a second face, a face of the electric core adjacent to the current collecting plate body is an electric core end face,

10. The cylindrical battery of claim 8, wherein the positioning structure is provided with an end portion, the end portion being located between the housing and the tab.

11. The cylindrical battery according to claim 10, wherein a side of the current collecting plate body adjacent to the electric cell is a first side, a side of the end portion facing the electric cell in the electric cell axial direction is a third side,