CN219873953U - Pin structure and battery core assembly comprising same - Google Patents

Abstract

The utility model provides a pin structure and a battery cell assembly comprising the same. The pin structure comprises a tab guide part, wherein the tab guide part is used for being connected with a tab, a through groove is formed in the bottom of the tab guide part, a first guide structure is arranged at the opening end of the through groove, extends from the opening end of the through groove to the direction of the groove bottom of the through groove, and is gradually close to the central axis of the through groove. The battery cell assembly includes: the electrode assembly comprises a shell, an electrode assembly, a top cover assembly and a pin structure, wherein one end of the pin structure is connected with a lug of the electrode assembly, and the other end of the pin structure is connected with an electrode terminal of the top cover assembly. According to the pin structure, the first guide structure is arranged at the opening end of the through groove to form the folded guide structure, so that the limiting piece of the welding tool can be led into the through groove when the welding tool is inserted and pulled out, and the welding tool is prevented from impacting or rubbing the pin structure and the electrode assembly body.

Description

Pin structure and battery core assembly comprising same

Technical Field

The utility model relates to the technical field of batteries, in particular to a pin structure and a battery cell assembly comprising the pin structure.

Background

In the manufacturing process of the battery cell assembly, the anode and cathode pins and the anode and cathode lugs extending out of the electrode assembly body are required to be welded together, and a welding tool is required to be inserted between the anode and cathode pins and the electrode assembly body before welding for welding support.

However, since the distance between the anode pin and the cathode pin and the electrode assembly body is small, when the pin has no guide structure, the welding fixture is not easy to be mounted at a predetermined position, and there is a risk of striking or rubbing the anode pin and the electrode assembly body.

Disclosure of Invention

The utility model aims to overcome the defects that in the prior art, as the distance between an anode pin and a cathode pin and an electrode assembly body is small, a welding tool is not easy to mount at a preset position and impacts or scratches the anode pin and the cathode pin and the electrode assembly body, and provides a pin structure and a battery cell assembly comprising the same.

The utility model solves the technical problems by the following technical scheme:

the utility model provides a pin structure, pin structure includes utmost point ear guiding portion, utmost point ear guiding portion is used for being connected with the utmost point ear, its characterized in that, link up the groove has been seted up to the bottom of utmost point ear guiding portion, the open end of link up the groove is equipped with first guide structure, first guide structure is followed the open end of link up the groove to the direction of the tank bottom of link up the groove extends, and is close to gradually the central axis of link up the groove.

In this technical scheme, through set up first guide structure at the open end of link up the groove, form a guide structure that draws in to can be when plug welding frock, lead in the link up the groove with the locating part of welding frock, avoid welding frock striking or cut and rub pin structure and electrode assembly body.

Preferably, the first guiding structure is a chamfer.

In the technical scheme, through the arrangement, a specific arrangement mode of the first guide structure is provided, and the first guide structure is convenient to process.

Preferably, the first guiding structure is an arc chamfer; or, the first guiding structure is an inclined chamfer, and the angle of the inclined chamfer is more than or equal to 0 degree and less than or equal to 90 degrees.

Preferably, an outward expansion structure is arranged on the outer side of the bottom end of the tab guiding part, and extends from the top end of the tab guiding part to the bottom end direction of the tab guiding part and gradually away from the central axis of the through groove.

In this technical scheme, through setting up the structure that expands outward, can strengthen the intensity of the bottom of pin structure, make pin structure overall structure more stable.

Preferably, an included angle is formed between the plane where the outward expansion structure is located and the plane where the side wall of the tab guiding portion is located, and the included angle is greater than or equal to 0 degree and less than or equal to 90 degrees.

Preferably, the bottom end of the tab guiding portion is provided with a second guiding structure, the second guiding structure extends from the top end of the tab guiding portion to the bottom end direction of the tab guiding portion, and the second guiding structure extends from one side of the tab guiding portion, which is close to the electrode assembly body, to one side, which is far away from the electrode assembly body, in an inclined manner.

In this technical scheme, through setting up the second guide structure, can make things convenient for welding frock to carry out the plug along the direction of height when, get into more easily between positive negative pole pin and the electrode assembly body.

Preferably, the second guiding structure is an inclined plane.

Preferably, the outer periphery of the through groove is provided with a convex boss.

In the technical scheme, the boss is arranged to strengthen the strength of the outer periphery of the through groove.

Preferably, the pin structure further comprises a terminal connection part and a bending part, wherein the terminal connection part is used for being connected with the electrode terminal, and the terminal connection part is connected with the tab guiding part through the bending part.

In the technical scheme, through the arrangement, a specific arrangement mode of the pin structure is provided.

A cell assembly, comprising:

a housing;

an electrode assembly disposed within the housing, the electrode assembly including an electrode assembly body and a tab extending from the electrode assembly body;

the top cover assembly comprises a top cover body and an electrode terminal arranged on the top cover body, and the top cover body is connected with the shell;

and one end of the pin structure is connected with the electrode lug, and the other end of the pin structure is connected with the electrode terminal.

The utility model has the positive progress effects that:

according to the utility model, the first guide structure is arranged at the opening end of the through groove to form a furled guide structure, so that the limiting piece of the welding tool can be led into the through groove when the welding tool is inserted and pulled out, and the welding tool is prevented from impacting or rubbing the pin structure and the electrode assembly body.

Drawings

Fig. 1 is a schematic perspective view of a pin structure according to embodiment 1 of the present utility model.

Fig. 2 is a schematic perspective view of another angle of the lead structure according to embodiment 1 of the present utility model.

Fig. 3 is a schematic side view of a lead structure according to embodiment 1 of the present utility model.

Fig. 4 is an enlarged view of a partial structure of a portion a in fig. 3.

Fig. 5 is a schematic partial perspective view of a battery cell assembly according to embodiment 1 of the present utility model.

Fig. 6 is a schematic perspective view of the battery cell assembly of embodiment 1 of the present utility model before being mounted on a welding tool.

Fig. 7 is a schematic diagram of a front view structure of a battery cell assembly according to embodiment 1 of the present utility model after being mounted on a welding tool.

Fig. 8 is a schematic top view of the battery cell assembly according to embodiment 1 of the present utility model after being mounted on a welding tool.

Fig. 9 is a schematic side view of the battery cell assembly according to embodiment 1 of the present utility model after being mounted on a welding tool.

Fig. 10 is a schematic perspective view of a pin structure according to embodiment 2 of the present utility model.

Fig. 11 is a schematic perspective view of another angle of the lead structure according to embodiment 2 of the present utility model.

Fig. 12 is a schematic side view of a lead structure according to embodiment 2 of the present utility model.

Fig. 13 is an enlarged view of a partial structure of a portion B in fig. 12.

Fig. 14 is a schematic partial perspective view of a battery cell assembly according to embodiment 2 of the present utility model.

Fig. 15 is a schematic front view of a portion of a pin structure according to another embodiment of embodiment 2 of the present utility model.

Fig. 16 is a schematic perspective view of a lead structure according to embodiment 3 of the present utility model.

Fig. 17 is a schematic perspective view of another angle of the lead structure according to embodiment 3 of the present utility model.

Fig. 18 is a schematic side view of a lead structure according to embodiment 3 of the present utility model.

Fig. 19 is a partial enlarged view of the part C in fig. 18.

Fig. 20 is a schematic partial perspective view of a battery cell assembly according to embodiment 3 of the present utility model.

Reference numerals illustrate.

Cell assembly 1

Pin structure 10

Tab guide 11

Through groove 111

Boss 1111

First guide structure 112

External expansion structure 113

Second guiding structure 114

Terminal connecting portion 12

Bending part 13

Electrode assembly 20

Electrode assembly body 21

Tab 22

Second sidewall 221

Connecting wall 222

Top cover assembly 30

Top cover body 31

Electrode terminal 32

Welding fixture 4

Limiting piece 41

Support member 42

Detailed Description

The present utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown.

Example 1

As shown in fig. 1-5, the present embodiment provides a lead structure 10, where the lead structure 10 includes a tab guiding portion 11, the tab guiding portion 11 is used for connecting with a tab 22, a through groove 111 is formed at the bottom of the tab guiding portion 11, a first guiding structure 112 is disposed at an opening end of the through groove 111, and the first guiding structure 112 extends from the opening end of the through groove 111 toward a bottom of the through groove 111 and gradually approaches to a central axis O of the through groove 111.

Like this, through set up first guide structure 112 at the open end of link up groove 111, form a guide structure that draws in to can be when plug welding frock, leading-in link up groove 111 with the locating part of welding frock, avoid welding frock striking or scratch pin structure 10 and electrode assembly body.

In this embodiment, the first guide structure 112 is a chamfer. Specifically, the first guide structure 112 is an arc chamfer. The arc chamfer structure is convenient to process, and has a certain buffer function on impact force.

The number of the first guide structures 112 is two, and the first guide structures are respectively arranged at the bottom ends of the two side walls of the through groove 111. However, the number of the first guide structures 112 is not limited thereto, and may be one, and may be disposed at the bottom end of one of the two sidewalls of the through groove 111.

In the present embodiment, the first guiding structure 112 is integrally formed on the pin structure 10, so that the first guiding structure 112 has better structural strength.

The outer circumference of the through groove 111 is provided with a convex boss 1111 to strengthen the outer circumference of the through groove 111.

The lead structure 10 further includes a terminal connection portion 12 and a bending portion 13, the terminal connection portion 12 is used for connecting with an electrode terminal, and the terminal connection portion 12 is connected with the tab guide portion 11 via the bending portion 13.

As shown in fig. 6-9, the present embodiment further provides a battery cell assembly 1, including: a case (not shown), an electrode assembly 20, a cap assembly 30, and the lead structure 10 as described above.

The electrode assembly 20 is disposed in the case, and the electrode assembly 20 includes an electrode assembly body 21 and tabs 22 extending from the electrode assembly body 21. The cap assembly 30 includes a cap body 31 and electrode terminals 32 disposed on the cap body 31, the cap body 31 being connected to the case. One end of the lead structure 10 is connected to the tab 22, and the other end is connected to the electrode terminal 32. Specifically, the tab guide portion 11 of the lead structure 10 is connected to the tab 22, and the terminal connection portion 12 of the lead structure 10 is connected to the electrode terminal 32.

In this embodiment, the tab 22 includes a first side wall and a second side wall 221 disposed opposite to each other, and a connecting wall 222 connected between the first side wall and the second side wall 221, where the first side wall is attached to a portion of a side of the electrode assembly body 21, and the first side wall, the connecting wall 222, and the second side wall 221 enclose an accommodating space. The tab guide 11 of the lead structure 10 is located in the receiving space and is connected only to the second sidewall 221.

When the lead structure 10 and the tab 22 are connected together by welding, that is, when the tab guide 11 of the lead structure 10 and the second sidewall 221 of the tab 22 are welded together, the support member 42 of the welding fixture 4 is inserted between the tab guide 11 and the first sidewall of the tab 22 and between the tab guide 11 and the electrode assembly body 21 of the lead structure 10, so as to prevent the tab guide 11 and the first sidewall and the tab guide 11 and the electrode assembly body 21 from being welded together.

The number of the tabs 22 is two, namely a positive electrode tab and a negative electrode tab, and the two tabs 22 are respectively positioned at two sides of the electrode assembly body 21. The number of the electrode terminals 32 is two, positive electrode terminals and negative electrode terminals, respectively, and the two electrode terminals 32 are provided at both ends of the top cover body 31, respectively. The number of the pin structures 10 is two, and one pin structure 10 is connected with the positive electrode tab 22 and the positive electrode terminal; the other lead structure 10 connects the negative tab 22 and the negative terminal.

When the welding tool 4 is used, when the limiting piece 41 of the welding tool 4 is inserted into or pulled out of the through groove 111 along the height direction H of the cell assembly 1, the limiting piece 41 of the welding tool 4 can be guided into the through groove 111 by the first guide structure 112 arranged at the opening end of the through groove 111, so that the welding tool 4 is prevented from impacting or rubbing the pin structure 10 and the electrode assembly body 21.

Example 2

As shown in fig. 10 to 14, the overall structure of the lead structure 10 of the present embodiment is basically the same as that of embodiment 1, except that the first guide structure 112 is not a round chamfer, but is a bevel chamfer, and the angle α of the bevel chamfer is 45 degrees, and in other embodiments, the angle α of the bevel chamfer may be any angle of 0 degrees or more and 90 degrees or less. However, the first guide structure 112 is not limited to this, and may be a round chamfer or may have a structure that extends from the opening end of the through groove 111 toward the bottom of the through groove 111 and gradually approaches the center axis O of the through groove 111.

As shown in fig. 15, in another implementation manner of this embodiment, the bottom end of the tab guiding portion 11 is further provided with a second guiding structure 114, the second guiding structure 114 extends from the top end of the tab guiding portion 11 toward the bottom end of the tab guiding portion 11, and the second guiding structure 114 extends obliquely from the side of the tab guiding portion 11 close to the electrode assembly body 21 toward the side far from the electrode assembly body 21. In this way, by providing the second guiding structure 114, the welding tool 4 can be conveniently inserted and pulled along the height direction H, and can more easily enter between the positive and negative electrode pins and the electrode assembly body 21.

Preferably, the second guiding structure 114 is a slope to form a flat guiding surface.

In the present embodiment, the second guiding structure 114 is integrally formed on the lead structure 10, so that the second guiding structure 114 has better structural strength.

The present embodiment also provides a battery cell assembly 1, where the overall structure of the battery cell assembly 1 is substantially the same as that in embodiment 1, and the battery cell assembly 1 includes a pin structure 10 in this embodiment.

Example 3

As shown in fig. 16 to 20, the overall structure of the lead structure 10 of the present embodiment is substantially the same as that of embodiment 2, and the lead structure 10 of the present embodiment further includes a flaring structure 113 on the basis of the structure of embodiment 2. The flaring structure 113 is disposed outside the bottom end of the tab guiding portion 11, and the flaring structure 113 extends from the top end of the tab guiding portion 11 toward the bottom end of the tab guiding portion 11 and gradually away from the central axis O of the through slot 111. In this way, by providing the flaring structure 113, the strength of the bottom end of the pin structure 10 can be enhanced, so that the overall structure of the pin structure 10 is more stable.

The plane in which the flaring structure 113 is located and the plane in which the side wall of the tab guiding portion 11 is located form an included angle, and the included angle β is 25 degrees, but not limited thereto, and in other embodiments, the included angle β may be any angle of greater than or equal to 0 degrees and less than or equal to 90 degrees.

In the present embodiment, the number of the flaring structures 113 may be two, which are respectively disposed outside the bottom ends of both sides of the tab guiding part 11. However, the number of the flaring structures 113 is not limited thereto, and may be one and may be disposed outside the bottom end of one of both sides of the tab guiding part 11.

In this embodiment, the first guiding structure 112 is a chamfer angle, and the angle α of the chamfer angle is 25 degrees.

The present embodiment also provides a battery cell assembly 1, where the overall structure of the battery cell assembly 1 is substantially the same as that in embodiment 2, and the battery cell assembly 1 includes a pin structure 10 in the present embodiment.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.

Claims (10)

1. The utility model provides a pin structure, pin structure includes utmost point ear guiding portion, utmost point ear guiding portion is used for being connected with the utmost point ear, its characterized in that, link up the groove has been seted up to the bottom of utmost point ear guiding portion, the open end of link up the groove is equipped with first guide structure, first guide structure is followed the open end of link up the groove to the direction of the tank bottom of link up the groove extends, and is close to gradually the central axis of link up the groove.

2. The pin structure of claim 1 wherein said first guide structure is a chamfer.

3. The pin structure of claim 2 wherein said first guide structure is an arcuate chamfer; or, the first guiding structure is an inclined chamfer, and the angle of the inclined chamfer is more than or equal to 0 degree and less than or equal to 90 degrees.

4. The lead structure according to claim 1, wherein an outer side of the bottom end of the tab guide portion is provided with an expanding structure which extends from the top end of the tab guide portion toward the bottom end of the tab guide portion and gradually away from the central axis of the through groove.

5. The lead structure of claim 4, wherein the plane of the flared structure forms an angle with the plane of the sidewall of the tab guide, the angle being greater than or equal to 0 degrees and less than or equal to 90 degrees.

6. The lead structure according to claim 1, wherein the bottom end of the tab guide portion is provided with a second guide structure extending from the top end of the tab guide portion toward the bottom end of the tab guide portion, and the second guide structure extends obliquely from a side of the tab guide portion near the electrode assembly body toward a side away from the electrode assembly body.

7. The pin structure of claim 6, wherein the second guiding structure is a bevel.

8. The pin structure of claim 1, wherein the outer periphery of the through slot is provided with a convex boss.

9. The lead structure according to any one of claims 1 to 8, further comprising a terminal connection portion for connection with an electrode terminal and a bent portion via which the terminal connection portion is connected with the tab guide portion.

10. A cell assembly, comprising:

a housing;

an electrode assembly disposed within the housing, the electrode assembly including an electrode assembly body and a tab extending from the electrode assembly body;

the top cover assembly comprises a top cover body and an electrode terminal arranged on the top cover body, and the top cover body is connected with the shell;

a lead structure according to any one of claims 1 to 9, wherein one end of the lead structure is connected to the tab and the other end is connected to the electrode terminal.