CN213782211U

CN213782211U - Novel lithium battery composite pole

Info

Publication number: CN213782211U
Application number: CN202021989920.8U
Authority: CN
Inventors: 陈中元; 明创业; 罗衡平
Original assignee: Wuhan Fuhang Precision Industry Co ltd
Current assignee: Wuhan Fuhang Precision Industry Co ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2021-07-23
Anticipated expiration: 2030-09-11

Abstract

The utility model provides a novel lithium battery composite pole, wherein a pole base is in threaded connection with an external terminal, which is convenient for fast fastening and assembling and has extremely low cost; the pole base and the external terminal are further welded and fixed by adopting high-molecular diffusion welding, so that the problems that the pole is not firmly welded and is broken after being used for a period of time due to certain probability of friction welding are thoroughly solved; the investment of polymer diffusion welding equipment is one tenth of that of friction welding on the premise of the same productivity, and the welding is firmer.

Description

Novel lithium battery composite pole

Technical Field

The utility model relates to a lithium cell utmost point post field especially relates to a novel compound utmost point post of lithium cell.

Background

With the popularization of electric vehicles in China, the lithium ion battery market also has greatly increased as an energy storage device of the electric vehicles. The existing lithium ion battery for the electric automobile is generally formed by sealing an aluminum shell or a steel shell.

The utmost point post is the switching device of the inside electric core of internal connection lithium cell and external connection wiring board, generally adopts aluminium or copper product, wherein, because the inside electric core negative pole utmost point ear of lithium cell generally adopts the copper product, and outside wiring board generally adopts the aluminium material, consequently, adopts copper aluminium combined material's negative pole utmost point post to come into production in due charge. The composite cathode pole of the existing lithium battery generally comprises a pole base made of copper and an external terminal made of aluminum, and the two are fixed in a friction welding mode. The pole and the preparation process have the following problems:

(1) the friction welding process has a certain insecure probability, so that the pole is easy to break;

(2) the friction welding process has large equipment investment and low production efficiency, and the cost of the composite pole is high.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a novel compound utmost point post of lithium cell, its intensity is high and manufacturing cost is lower.

The technical scheme of the utility model is realized like this: the utility model provides a novel compound utmost point post of lithium cell, it includes utmost point post base (1) and external terminal (2) utmost point post base (1) adopts the copper product matter, and external terminal (2) adopt aluminium material, its characterized in that: the pole base (1) comprises a fixed seat (11) and a threaded column (12), wherein the threaded column (12) is vertically arranged on the surface of the fixed seat (11); the external terminal (2) is of a revolving body structure, an internal threaded hole (20) is formed in the bottom of the external terminal, and the threaded column (12) extends into the internal threaded hole (20) and is in threaded connection with the internal threaded hole.

On the basis of the technical scheme, preferably, the pole base (1) and the external terminal (2) are welded and fixed by adopting high-molecular diffusion welding.

On the basis of the technical scheme, preferably, an annular groove (21) is formed in the outer circumferential direction of the external terminal (2).

On the basis of the technical scheme, preferably, the top edge of the external terminal (2) is provided with an annular step groove (22).

On the basis of the above technical solution, preferably, the fixing seat (11) is a cubic structure.

Further preferably, four edges on the side surface of the fixed seat (11) are provided with rounded corners.

The utility model discloses a novel compound utmost point post of lithium cell has following beneficial effect for prior art:

(1) the pole base and the external terminal are connected by threads, so that the pole base and the external terminal are convenient to fasten and assemble quickly, and the cost is extremely low;

(2) the pole base and the external terminal are further welded and fixed by adopting high-molecular diffusion welding, so that the problems that the pole is not firmly welded and is broken after being used for a period of time due to certain probability of friction welding are thoroughly solved; the investment of polymer diffusion welding equipment is one tenth of that of friction welding on the premise of the same productivity, and the welding is firmer.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a top view of a pole of the present invention;

fig. 2 is a front sectional view of the pole base of the pole of the present invention;

fig. 3 is a front sectional view of the external terminal of the post of the present invention;

fig. 4 is a flow chart of the preparation process of the pole of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

As shown in fig. 1, with reference to fig. 2-3, the novel lithium battery composite post of the present invention includes a post base 1 and an external terminal 2.

The pole base 1 is made of copper. Specifically, the pole base 1 includes a fixing seat 11 and a threaded column 12.

And the fixing seat 11 is welded and fixed with the battery cover plate and the battery cell negative electrode lug. In a preferred embodiment, the fixing base 11 has a cubic structure. In a preferred embodiment, four edges of the side surface of the fixing seat 11 are provided with rounded corners to prevent damage.

And the threaded column 12 is vertically arranged on the surface of the fixed seat 11 and is connected with the external terminal 2. The external terminal 2 is a revolving body structure, the bottom of the external terminal is provided with an internal threaded hole 20, and the threaded column 12 extends into the internal threaded hole 20 and is in threaded connection with the internal threaded hole.

In a preferred embodiment, the pole base 1 and the external terminal 2 are welded and fixed by polymer diffusion welding. The investment of polymer diffusion welding equipment is one tenth of that of friction welding on the premise of the same productivity, and the welding is firmer.

Specifically, an annular groove 21 is circumferentially formed in the outer side of the external terminal 2 and used for clamping an upper plastic plate on the cover plate.

Specifically, annular step groove 22 has been seted up at 2 top edges of external terminal, the sealed of being convenient for mould plastics.

The utility model discloses a novel lithium battery composite pole production technology is shown in figure 4:

firstly, providing a semi-finished pole base 1 and an external terminal 2 which are subjected to cold heading processing;

then, the pole base 1 and the external terminal 2 are connected through threads and screwed tightly;

then, performing macromolecular diffusion welding on the connecting piece;

finally, an annular groove 21 and an annular step groove 22 are machined on the outer side of the external terminal 2.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a novel compound utmost point post of lithium cell, its includes utmost point post base (1) and external terminal (2) utmost point post base (1) adopts the copper product matter, and external terminal (2) adopt aluminium material, its characterized in that: the pole base (1) comprises a fixed seat (11) and a threaded column (12), wherein the threaded column (12) is vertically arranged on the surface of the fixed seat (11); the external terminal (2) is of a revolving body structure, an internal threaded hole (20) is formed in the bottom of the external terminal, and the threaded column (12) extends into the internal threaded hole (20) and is in threaded connection with the internal threaded hole.

2. The novel lithium battery composite post of claim 1, characterized in that: the pole base (1) and the external terminal (2) are welded and fixed by adopting high-molecular diffusion welding.

3. The novel lithium battery composite post of claim 1, characterized in that: and an annular groove (21) is formed in the outer side circumference of the external terminal (2).

4. The novel lithium battery composite post of claim 1, characterized in that: and an annular step groove (22) is formed in the edge of the top of the external terminal (2).

5. The novel lithium battery composite post of claim 1, characterized in that: the fixed seat (11) is of a cubic structure.

6. The novel lithium battery composite post of claim 5, characterized in that: four edges on the side surface of the fixed seat (11) are provided with rounded corners.