CN210006814U

CN210006814U - lithium ion battery's utmost point ear connection structure

Info

Publication number: CN210006814U
Application number: CN201920611219.3U
Authority: CN
Inventors: 马启胜; 尚随军; 郑荣鹏
Original assignee: SUZHOU YULIANG BATTERY Co Ltd
Current assignee: SUZHOU YULIANG BATTERY Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-01-31
Anticipated expiration: 2029-04-30

Abstract

The utility model provides an lithium ion battery's utmost point ear connection structure, it includes the battery body, it includes casing, anodal, negative pole, the casing includes positive polar cap and negative-pole lid, anodal through anodal pin junction positive polar cap, the negative pole passes through negative-pole pin junction negative-pole lid, the border of the internal surface of negative-pole lid is equipped with the bed hedgehopping part, the memory metal piece erects on the bed hedgehopping part, the end connection of negative-pole lead wire in the intermediate position of memory metal piece, the tip of negative-pole lead wire, memory metal piece and negative-pole lid from top to bottom play through fix with rivet at , the utility model discloses add memory metal piece and three between negative-pole lead wire and negative-pole lid and pass through rivet connection, when battery temperature reached 80-120 ℃, the memory metal piece takes place deformation, drives the negative-pole lead wire and breaks away from the negative-pole lid to realize that the battery is inside to open circuit, therefore, the utility model discloses compare in prior art the battery.

Description

lithium ion battery's utmost point ear connection structure

Technical Field

The utility model relates to a lithium cell field particularly, relates to kinds of lithium ion battery's utmost point ear connection structure.

Background

The lithium ion battery pole piece is manufactured by the steps of preparing slurry from active substances, uniformly coating the slurry on a current collector copper foil or aluminum foil by using a coating machine, and preparing the strip pole piece with the weight loss ratio meeting the process requirements after coating. At present, when a battery is in short circuit, potential safety hazards caused by overhigh temperature of the battery can be caused.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses add memory metal piece and three and pass through rivet connection between negative pole lead wire and negative pole lid, when the battery temperature reached 80-120 ℃, the memory metal piece took place deformation, drove the negative pole lead wire and breaks away from the negative pole lid to realize that the battery is inside to open circuit, therefore, compared with prior art, the utility model solves the battery high temperature that the short circuit arouses and the potential safety hazard that causes.

The utility model provides an lithium ion battery's utmost point ear connection structure, it includes the battery body, it includes the casing, anodal, the negative pole, the casing includes positive polar cap and negative-pole lid, anodal through anodal pin junction positive polar cap, the negative pole passes through negative-pole pin junction negative-pole lid, the border of the internal surface of negative-pole lid is equipped with the bed hedgehopping part, the memory metal piece erects on the bed hedgehopping part, the end connection of negative-pole pin is in the intermediate position of memory metal piece, the tip of negative-pole pin, memory metal piece and negative-pole lid from top to bottom play through fix with rivet , the material of memory metal piece is Ti-Ni.

The utility model provides an among lithium ion battery's utmost point ear connection structure, aspect riveting mode can not produce the metal dust to solve resistance welding and form the problem of metal dust, aspect memory metal piece can take place deformation when battery temperature reaches 80-120 ℃ in addition, makes the disconnection of the riveting port of memory metal piece and negative pole lid, thereby the battery can't in time cut off the problem in return circuit when solving outside short circuit.

Therefore, compared with the prior art, the tab connection structure of the lithium ion batteries of the present embodiment mainly has the following advantages:

1) the potential safety hazard caused by overhigh battery temperature caused by short circuit is solved.

2) The problem of resistance welding formation metal dust is solved.

3) Convenient and environment-friendly installation.

, the end of the negative lead is fixedly connected with a connecting plate, and the connecting plate, the memory metal sheet and the negative cover are fixed at by rivets from top to bottom.

In the tab connection structure of lithium ion batteries, as a scheme of step , metal dust is not generated in the riveting mode, and the riveting mode is fastened through interference fit of the inner wall, so that the memory metal sheet is conveniently separated from the negative cover.

, the raising component is a ring-shaped insulation sheet.

In the tab connection structure of lithium ion batteries, as a scheme of step , the annular insulating sheet plays a role in erecting a metal memory sheet in terms of shape and size, and prevents the negative electrode from being directly connected to the negative electrode cover through a medium in terms of insulation, so that potential safety hazards are avoided.

step by step, the annular insulating piece is provided with the connection face and the second connection face, and the connection end of memory sheetmetal is connected to the connection face, and the second connection face is connected in the second connection end of memory sheetmetal, and fixed mounting has the spacing part of on the connection face, and fixed mounting has the spacing part of second on the second connection face.

In the tab connection structure of lithium ion batteries, as a scheme of step , the -th limiting component and the second limiting component are used for limiting two ends of the memory metal sheet, so as to prevent the memory metal from turning over at the bottom of the battery due to external force after the memory metal is separated from the negative electrode cover, and because the memory metal sheet has excellent conductive performance, secondary short circuit inside the battery is easy to occur in such a situation.

, the position-limiting component and the second position-limiting component are both U-shaped plates, a U-shaped through hole is formed between the position-limiting component and the connecting surface, a second U-shaped through hole is formed between the second position-limiting component and the second connecting surface, the connecting end is positioned in the U-shaped through hole, and the second connecting end is positioned in the second U-shaped through hole.

In the tab connection structure of the lithium ion batteries, the size of the U-shaped through hole is matched with the size of the memory metal sheet as a scheme of step .

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural diagram of a tab connection structure of lithium ion batteries provided by embodiments of the present invention.

Fig. 2 is a schematic structural diagram of a tab connection structure of lithium ion batteries provided by embodiments of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Example :

referring to fig. 1 and 2, the tab connection structure of lithium ion batteries provided by embodiment of the present invention is shown in the drawings, which includes a battery body including a casing 11, a positive electrode 12 and a negative electrode 13, the casing 11 includes a positive electrode cover 111 and a negative electrode cover 112, the positive electrode 12 is connected to the positive electrode cover 111 through a positive electrode lead, the negative electrode 13 is connected to the negative electrode cover 112 through a negative electrode lead 15, a pad-up member 2 is disposed around the inner surface of the negative electrode cover 112, a memory metal sheet 3 is erected on the pad-up member 2, the end of the negative electrode lead 15 is connected to the middle position of the memory metal sheet 3, the end of the negative electrode lead 15, the memory metal sheet 3 and the negative electrode cover 112 are fixed to from top to bottom through rivets 4, and the memory metal sheet 3 is made of Ti-Ni material.

The end of the negative lead 15 is fixedly connected with a connection plate 151, the memory metal sheet 3 and the negative cover 112 are fixed from top to bottom by a rivet 4 from , the raising component 2 is an annular insulating sheet, the annular insulating sheet is provided with a connection surface 21 and a second connection surface 22, a 0 connection surface 21 is connected to a 1 connection end 31 of the memory metal sheet 3, the second connection surface 22 is connected to a second connection end 32 of the memory metal sheet 3, a connection surface 21 is fixedly provided with a limiting component 211, a second connecting surface 22 is fixedly provided with a second limiting component 221, a limiting component 211 and a second limiting component 221 are both U-shaped plates, an U-shaped through hole 212 is formed between the limiting component 211 and the connection surface 21, a second U-shaped through hole 222 is formed between the second limiting component 221 and the second connection surface 22, the connection end 31 is positioned in the U-shaped through hole 212, and the second connection end 32 is positioned in the second U-shaped through hole 222.

2) The problem of resistance welding formation metal dust is solved.

3) Convenient and environment-friendly installation.

Example two:

referring to fig. 1 and fig. 2, in the tab connection structure of lithium ion batteries provided by the second embodiment of the present invention, the present embodiment further makes steps on the basis of the above embodiments to obtain an improved technical solution, in which the distance between the annular insulating sheet and the negative electrode cover 112 is shortened by thickening the annular insulating sheet, the left height is equal to the thickness of the memory metal sheet 3, so that the negative electrode cover 112 and the annular insulating sheet longitudinally limit the opposite sides of the memory metal sheet 3, thereby replacing the th limiting component 211 and the second limiting component 221 to achieve the limiting function.

Example three:

referring to fig. 1 and fig. 2, in the tab connection structure of lithium ion batteries provided by the third embodiment of the present invention, the present embodiment further provides steps on the basis of the above embodiments, and the following technical solution is taken as an improvement, in which the opposite sides of the memory metal sheet 3, the annular insulating sheet and the negative electrode cover 112 are fixed from top to bottom by screws, and this connection manner can fix three components, i.e., the memory metal sheet 3, the annular insulating sheet and the negative electrode cover 112, at the same time, thereby improving the installation efficiency.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1, kind of lithium ion battery's utmost point ear connection structure, its characterized in that includes:

the battery comprises a battery body, wherein the battery body comprises a shell (11), a positive electrode (12) and a negative electrode (13), the shell (11) comprises a positive electrode cover (111) and a negative electrode cover (112), the positive electrode (12) is connected with the positive electrode cover (111) through a positive electrode lead, the negative electrode (13) is connected with the negative electrode cover (112) through a negative electrode lead (15), and the periphery of the inner surface of the negative electrode cover (112) is provided with a heightening component (2);

the memory metal sheet (3) is erected on the heightening component (2), the end part of the negative electrode lead (15) is connected to the middle position of the memory metal sheet (3), the end part of the negative electrode lead (15), the memory metal sheet (3) and the negative electrode cover (112) are fixed from top to bottom through a rivet (4) from , and the memory metal sheet (3) is made of Ti-Ni.

2. The tab connection structure of lithium ion batteries according to claim 1, wherein a connection plate (151) is fixedly connected to the end of the negative electrode lead (15), and the connection plate (151), the memory metal sheet (3) and the negative electrode cover (112) are fixed from top to bottom by rivets (4) from .

3. The tab connection structure of kinds of lithium ion batteries according to claim 1, wherein the raised part (2) is an annular insulating sheet.

4. The kind of lithium ion battery's utmost point ear connection structure of claim 3, characterized in that, annular insulating piece is provided with and connects face (21) and second connection face (22), the is connected face (21) and is connected in the link (31) of memory metal piece (3), the second is connected face (22) and is connected in the second link (32) of memory metal piece (3), is connected face (21) and is gone up fixed mounting and have the spacing part of (211), second is connected face (22) and is gone up fixed mounting and has the spacing part of second (221).

5. The kind of lithium ion battery's utmost point ear connection structure of claim 4, characterized in that, the limit part (211) and the second limit part (221) are both U-shaped plates, the limit part (211) and the connection face (21) form the U-shaped through-hole (212), the second limit part (221) and the second connection face (22) form the second U-shaped through-hole (222), the connection end (31) is located in the U-shaped through-hole (212), the second connection end (32) is located in the second U-shaped through-hole (222).