CN218887235U

CN218887235U - Positive current collector, cylindrical battery cell and battery device

Info

Publication number: CN218887235U
Application number: CN202222693330.6U
Authority: CN
Inventors: 陈成兵
Original assignee: Anhui Deyi Energy Technology Co ltd
Current assignee: Anhui Deyi Energy Technology Co ltd
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2023-04-18
Anticipated expiration: 2032-10-12

Abstract

The utility model belongs to anodal mass flow body structural design field provides an anodal mass flow body, cylinder electricity core and battery device. Wherein, anodal mass flow body, including the switching post, the switching post is step columnar structure, the switching post includes support column and guide post, the diameter of guide post is greater than the diameter of support column. It can reduce the adaptation problem of switching post and utmost point post by a wide margin under the prerequisite of guaranteeing to overflow, makes things convenient for the assembly of anodal mass flow body and other parts, can reduce the assembly fault rate on the whole, further promotes the production efficiency and the yields of cylinder electricity core production line.

Description

Positive current collector, cylindrical battery cell and battery device

Technical Field

The utility model belongs to anodal mass flow body structural design field especially relates to an anodal mass flow body, cylinder electricity core and battery device.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

At present, the structure of positive negative pole is gone out for both ends to cylinder electricity core mostly, and corresponding later stage electricity core module and PACK (the welding equipment of group battery) design need carry out corresponding packing, encapsulation and assembly respectively to the positive negative pole structure at both ends, makes electricity core module and PACK design more complicated like this, and consumes a large amount of manpower and materials. The current collector is a main component forming the cylindrical battery cell. The current collector refers to a structure or a part that collects current, for example, mainly refers to a metal foil such as a copper foil, an aluminum foil on a lithium ion battery. The current collector mainly collects the current generated by the active materials of the battery so as to form larger current to be output to the outside.

The inventor finds that the current collector can cause the problems of angle inclination or size non-adaption and the like of the switching column in the assembling process of the switching column and other components on the premise of ensuring overcurrent, so that the assembly is difficult, and the production efficiency and the yield of a cylindrical battery cell production line are reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems existing in the background technology, the utility model provides a positive current collector, a cylindrical battery cell and a battery device; wherein, anodal mass flow body can reduce the adaptation problem of switching post and utmost point post by a wide margin under the prerequisite of guaranteeing to overflow, makes things convenient for the assembly of anodal mass flow body and other parts, reduces the assembly fault rate on the whole, promotes the production efficiency and the yields of cylinder electricity core production line.

In order to realize the purpose, the utility model adopts the following technical scheme:

the utility model discloses a first aspect provides a positive current collector, it includes the switching post, the switching post is step columnar structure, the switching post includes support column and guide post, the diameter of guide post is greater than the diameter of support column.

As an embodiment, the ratio of the height (H1) of the guide post to the height (H2) of the support post ranges from: [0.2,2].

Preferably, the ratio of the height of the guide post (H1) to the height of the support post (H2) is 0.4, 0.6, 0.8 or 1.0.

Above-mentioned technical scheme's advantage lies in for the switching post can compromise welding and assembly.

As an embodiment, the ratio of the diameter (D1) of the support column to the diameter (D2) of the guide column ranges from: [0.5,1).

Preferably, the ratio of the diameter (D1) of the support column to the diameter (D2) of the guide column is 0.6, 0.7, 0.8 or 0.9.

Above-mentioned technical scheme's advantage lies in for the switching post can compromise the demand and the assembly process that overflow of battery, can reduce the assembly fault rate on the whole, further promotes the production efficiency and the yields of cylinder electricity core production line.

As an embodiment, the positive current collector further comprises a current collecting disc, and the current collecting disc is connected with the adapter column.

As an implementation mode, a plurality of boss structures are uniformly distributed on the flow collecting disc.

The advantage of the above technical solution is that the overall structural strength of the collecting disc can be enhanced in this way.

In one embodiment, the periphery of the collecting disc is provided with a flanging structure.

The advantage of above-mentioned technical scheme lies in, can strengthen the main part structural strength of current collecting plate like this, avoids part bending deformation.

In one embodiment, the current collecting plate is provided with a through hole.

The technical scheme has the advantage that the through holes are convenient for being soaked by electrolyte.

In one embodiment, the adapter column and the current collecting plate are welded and connected into a whole.

The technical scheme has the advantage that the current can be ensured to flow.

As an implementation mode, the adapter column is further provided with a liquid injection hole, and the liquid injection hole penetrates through two ends of the adapter column. And a sealing structure is arranged in the guide column and used for sealing the liquid injection hole.

A second aspect of the present invention provides a cylindrical battery cell, which includes a terminal and the above-mentioned positive current collector; and the pole is matched and assembled with the switching column.

A third aspect of the present invention provides a battery device, which includes a cylindrical battery cell as described above.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) The utility model discloses a switching post is step columnar structure, can reduce the adaptation problem of switching post and utmost point post by a wide margin under the prerequisite of guaranteeing to overflow, makes things convenient for the assembly of anodal mass flow body and other parts, can reduce the assembly fault rate on the whole, further promotes the production efficiency and the yields of cylinder electricity core production line.

(2) The utility model discloses an anodal mass flow body can couple together cylinder electricity core inside positive pole and outside positive terminal for positive negative terminal of electricity core lies in same one side, thereby has simplified electric core module equipment and PACK design.

(3) Because the support column is the higher then equipment more easily, the shorter then area of contact of switching post and utmost point post is the bigger the support column, therefore the ability of overflowing is better, welding effect is also better, the utility model discloses a make the switching post can compromise welding and assembly, set up the ratio scope of the height (H1) of guide post and the height (H2) of support column and be: [0.2,2].

(4) Because diameter (D1) of support column is the less for diameter (D2) of guide post, then assemble more easily, nevertheless in order to compromise the ability of overflowing of part, the utility model discloses set up, the ratio scope of diameter (D1) of support column and diameter (D2) of guide post is: [0.5,1), so that the switching column can give consideration to the overcurrent requirement and the assembly process of the battery, the assembly fault rate can be reduced on the whole, and the production efficiency and the yield of the production line of the cylindrical battery cell are further improved.

(5) The utility model discloses evenly laid a plurality of boss structures on the current collection dish, can strengthen the overall structure intensity of current collection dish like this.

(6) The utility model discloses be equipped with flange structure in the border of current collecting plate, can strengthen the major structure intensity of current collecting plate like this, avoid part bending deformation.

Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.

Fig. 1 is a cross-sectional view of a positive current collector of an embodiment of the present invention;

fig. 2 is a top view of a positive current collector of an embodiment of the present invention;

fig. 3 is a schematic perspective view of an adapter column according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of an adapter post according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of a current collecting plate according to an embodiment of the present invention;

fig. 6 is an assembly schematic diagram of the positive electrode current collector and the electrode post according to the embodiment of the present invention.

Wherein, 1, the switching column; 101. a liquid injection hole; 102. a step plane; 103. a support pillar; 104. a guide post; h1, height of the guide post; h2, the height of the support column; d1, the diameter of the support column; d2, the diameter of the guide post; 2. a current collecting plate; 201. a boss structure; 202. a flanging structure; 203. a through hole; 3. and (4) a pole.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. 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 invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

< Positive electrode Current collector >

Referring to fig. 1 and 2, the present embodiment provides a positive electrode current collector including an interposer 1. The adapter column shown in fig. 3 is a stepped columnar structure, and includes a support column 103 and a guide column 104, wherein a diameter D2 of the guide column 104 is greater than a diameter D1 of the support column 103. Further, the support post 103 and the guide post 104 are integrally formed.

The adapter column in the prior art does not have a step column shape, and the assembly difficulty caused by the reasons of angle inclination, size adaptation and the like of the adapter column can occur in the assembly process; the switching post of this embodiment is step columnar structure, and it can be under the prerequisite of guaranteeing to overflow, has reduced the adaptation problem of switching post and utmost point post by a wide margin, even certain angle slope or size adaptation scheduling problem take place for the switching post, the completion assembly that also can be smooth, and then accomplish the welding column. Can reduce the assembly fault rate on the whole, further promote the production efficiency and the yields of cylinder electricity core production line.

It should be noted that the material of the adapter column 1 can be aluminum or nickel, and those skilled in the art can specifically select the material according to the actual situation, and the detailed description is omitted here.

In the specific implementation process, as shown in fig. 3, a liquid injection hole 101 is further formed in the adapter column 1, and the liquid injection hole 101 penetrates through two ends of the adapter column 1. After the battery core is assembled, liquid can be injected through the liquid injection hole 101.

And a sealing structure is arranged in the guide column 104 and used for sealing the liquid injection hole 101. Specifically, the step plane 102 may house sealing structures such as: and after the liquid injection is finished, a sealing nail can be placed on the plane and is welded and sealed.

It should be noted that the material of the sealing nail may be aluminum or nickel, and those skilled in the art can specifically select the material according to the actual situation, and the detailed description is omitted here.

In other embodiments, the sealing structure can be provided with other sealing structures matched with the liquid injection hole besides the sealing nail, and the sealing structure can be specifically selected by a person skilled in the art according to actual conditions, and the details are not described here.

In the specific implementation process, the adapter column 1 and the current collecting disc 2 are connected into a whole in a welding mode. This ensures the flow of current.

As shown in fig. 4, the height of the guiding column 104 is H1, the height of the supporting column 103 is H2, the diameter of the supporting column 103 is D1, and the diameter of the guiding column 104 is D2; because the higher the support column then assembles more easily, the shorter the support column then the flow capacity and welding effect are better, in this embodiment, H1/H2 is more than or equal to 0.2 and is less than or equal to 2, make the switching post can compromise welding and assembly like this.

Where H1/H2 is preferably 0.4, 0.6, 0.8 or 1.0, which allows optimum welding and assembly.

The smaller the diameter of the support column relative to the diameter of the guide column is, the easier the assembly is, but in order to take account of the overcurrent capacity of the component, in the embodiment, D1/D2 is more than or equal to 0.5 and less than 1, so that the adapter column can take account of the overcurrent requirement and the assembly process of the battery. Can reduce the assembly fault rate on the whole, further promote the production efficiency and the yields of cylinder electricity core production line.

Wherein the preferred value of D1/D2 is 0.6, 0.7, 0.8 or 0.9, which allows both the over-current requirements of the battery and the assembly process to achieve the optimum results.

As shown in fig. 1, fig. 2 and fig. 5, the positive current collector of the present embodiment further includes a current collecting disc 2, and a plurality of boss structures 201 are uniformly distributed on the current collecting disc 2, so that the overall structural strength of the current collecting disc can be enhanced.

The periphery of the current collecting disc 2 is provided with the flanging structure 202, so that the structural strength of the main body of the current collecting disc can be enhanced, and the bending deformation of parts can be avoided.

In order to promote the electrolyte to rapidly enter the interior of the battery core, the current collecting plate 2 of the present embodiment is provided with through holes 203, which are convenient for the electrolyte to infiltrate.

< cylindrical cell >

In one or more embodiments, there is provided a cylindrical battery cell, which includes a positive electrode current collector as described above and a terminal; the pole 3 is matched and assembled with the adapter column 1, as shown in fig. 6.

It should be noted here that, besides the above-mentioned positive electrode current collector, other structures of the cylindrical battery cell can be implemented by using the prior art, and are not described in detail here.

This embodiment couples together the positive pole of cylinder electricity core inside and outside positive terminal through anodal mass flow body for positive negative terminal of electricity core lies in same one side, thereby has simplified electric core module equipment and PACK design.

< Battery device >

In one or more embodiments, a battery device is provided that includes a cylindrical cell as described above.

It should be noted that, besides the above cylindrical cells, other structures of the battery device can be implemented by using the prior art, and detailed description is omitted here.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The positive current collector is characterized by comprising an adapter column (1), wherein the adapter column (1) is of a step columnar structure, the adapter column (1) comprises a support column (103) and a guide column (104), and the diameter (D2) of the guide column is larger than the diameter (D1) of the support column;

the ratio range of the height (H1) of the guide column to the height (H2) of the support column is as follows: [0.2,2];

the range of the ratio of the diameter (D1) of the support column to the diameter (D2) of the guide column is as follows: [0.5,1);

the positive current collector also comprises a current collecting disc (2), and the current collecting disc (2) is connected with the adapter column (1);

a plurality of boss structures (201) are uniformly distributed on the flow collecting disc (2);

the periphery of the collecting disc (2) is provided with a flanging structure (202).

2. The positive electrode current collector of claim 1, wherein a ratio of the height of the guide pillar (H1) to the height of the support pillar (H2) is 0.4, 0.6, 0.8, or 1.0.

3. The positive electrode current collector of claim 1, wherein the ratio of the diameter (D1) of the support pillar to the diameter (D2) of the guide pillar is 0.6, 0.7, 0.8, or 0.9.

4. The positive current collector according to claim 1, characterized in that said collector disc (2) is provided with through holes (203).

5. The positive current collector according to claim 1, characterized in that said stud (1) and said collector disc (2) are both welded and joined together.

6. The positive electrode current collector as claimed in claim 1, wherein the transfer column (1) is further provided with a liquid injection hole (101), and the liquid injection hole (101) penetrates through two ends of the transfer column (1); and a sealing structure is arranged in the guide column (104) and is used for sealing the liquid injection hole (101).

7. A cylindrical cell, comprising a positive electrode current collector according to any one of claims 1 to 6 and a terminal; and the pole (3) is matched and assembled with the transfer column (1).

8. A battery device comprising the cylindrical cell of claim 7.