CN212648339U

CN212648339U - Lithium ion battery

Info

Publication number: CN212648339U
Application number: CN202021274181.4U
Authority: CN
Inventors: 崔云; 祝媛; 袁中直; 刘金成
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2021-03-02
Anticipated expiration: 2030-07-01

Abstract

The utility model discloses a lithium ion battery, including the main casing body, the cover plate, the core package, at least one piece and at least one plug converge, one side opening of the main casing body, the opening side of the cover plate closing cap main casing body, the core package sets up the intracavity that holds that forms at the main casing body and cover plate, has seted up at least one first through-hole on the main casing body, and the plug setting is in first through-hole, has seted up the second through-hole on the plug, and the one end and the core package of piece converge are connected, and the other end of the piece that converges passes the second through-hole and extends to. The utility model discloses a lithium ion battery simple structure adopts the plug as sealing member and converges the insulating part of piece, and spare part is small in quantity, has simplified assembly process greatly, can show and shorten battery manufacturing cycle, reduces equipment, personnel and place demand, has reduced the manufacturing cost of battery.

Description

Lithium ion battery

Technical Field

The utility model relates to a battery manufacturing technology field especially relates to a lithium ion battery of easily assembling.

Background

The conventional soft package battery is thicker in thickness, lower in battery energy density, difficult to break through higher energy density, complex in battery assembly process flow, long in battery manufacturing period and low in production efficiency, and causes the problems that the battery is manufactured by multiple devices, needs more labor and occupies a larger place. In addition, the method has the defects of dependence on imported raw materials, high cost and no contribution to localization.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lithium ion battery, spare part is small in quantity, and assembly process is simple, has improved battery production efficiency, has reduced manufacturing cost.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a lithium ion battery, including main casing body, cover plate, core package, at least one piece and at least one plug converge, one side opening of main casing body, the cover plate closing cap the opening side of main casing body, the core package sets up the main casing body with the intracavity that holds that the cover plate formed, at least one first through-hole has been seted up on the main casing body, the plug sets up in the first through-hole, the second through-hole has been seted up on the plug, the one end of piece that converges with the core package is connected, the other end of piece that converges passes the second through-hole extends to outside the main casing body.

As an optimized scheme of the utility model, the plug includes base and cylinder, the external diameter of cylinder is less than the external diameter of base, the base sets up hold the intracavity, one side of base with the inner wall laminating of the main casing body, the cylinder extends to outside the main casing body.

As an optimized scheme of the utility model, the confluence piece passes the external diameter of plug one end is greater than the aperture of second through-hole.

As an optimized scheme of the utility model, the base with be provided with sealed glue between the main casing body.

As an optimized proposal of the utility model, the confluence piece and the rubber plug are provided with a sealing glue.

As an optimized scheme of the utility model, the quantity of first through-hole is two, two first through-hole is seted up the homonymy or the different sides of the main casing body.

As a preferred aspect of the present invention, the edge of the main housing is provided with a flange, and the edge of the cover plate is connected to the flange.

As a preferable embodiment of the present invention, the edge of the cover sheet is welded or bonded to the flange.

As a preferred scheme of the utility model, the main casing body is last to have seted up and to have annotated the liquid hole, annotate and be provided with sealed nail on the liquid hole.

As a preferred embodiment of the present invention, the main housing and the cover plate are made of metal.

The utility model has the advantages that:

the utility model discloses a lithium ion battery simple structure adopts the plug as sealing member and converges the insulating part of piece, and spare part is small in quantity, has simplified assembly process greatly, can show and shorten battery manufacturing cycle, reduces equipment, personnel and place demand, has reduced the manufacturing cost of battery.

Drawings

Fig. 1 is a schematic perspective view of a lithium ion battery according to an embodiment of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

fig. 4 is a side view of fig. 1.

In the figure:

1. a main housing; 11. a first through hole; 12. a liquid injection hole; 13. sealing the nail; 14. a flange; 2. a cover sheet; 3. a core package; 31. a core package body; 32. connecting sheets; 4. a bus bar; 5. a rubber plug; 51. a second through hole; 52. a base; 53. a column.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the word "over" a first feature or feature in a second feature may include the word "over" or "over" the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under" a second feature may include a first feature that is directly under and obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

As shown in fig. 1 to 4, the lithium ion battery of this embodiment includes main casing 1, cover plate 2, core package 3, two converge piece 4 and two plug 5, one side opening of main casing 1, the opening side of cover plate 2 closing cover main casing 1, core package 3 sets up the intracavity that holds that forms at main casing 1 and cover plate 2, two first through-holes 11 have been seted up on the main casing 1, plug 5 sets up in first through-hole 11, second through-hole 51 has been seted up on plug 5, converge the one end and the core package 3 of piece 4 and be connected, the other end of converging piece 4 passes second through-hole 51 and extends to outside the main casing 1.

The lithium ion battery of this embodiment simple structure adopts plug 5 as the sealing member and converges the insulating part of piece 4, and spare part is small in quantity, has simplified assembly process greatly, can show to shorten battery manufacturing cycle, reduces equipment, personnel and place demand, has reduced the manufacturing cost of battery.

In other embodiments, only one first through hole 11 is opened in the main housing 1, and thus only one bus bar 4 needs to be provided. In the present embodiment, one pole of the core pack 3 is connected to the bus bar 4, and the other pole of the core pack 3 is connected to the main case 1 (the positive electrode tab or the negative electrode tab of the core pack 3 is welded to the main case 1), so that the cost of the battery can be further reduced. In addition, an insulating film can be wrapped on part of the surface of the main shell 1, so that a specific area of the main shell 1, which is not wrapped by the insulating film, serves as a battery terminal, and the battery is prevented from being easily short-circuited due to the fact that the whole surface of the main shell 1 is exposed.

As shown in fig. 1 and 3, preferably, the rubber plug 5 includes a base 52 and a column 53, the outer diameter of the column 53 is smaller than the outer diameter of the base 52, the base 52 is disposed in the accommodating cavity, one side of the base 52 is attached to the inner wall of the main casing 1, and the column 53 extends out of the main casing 1. The base 52 has a limiting function, when the confluence piece 4 penetrates into the second through hole 51 of the rubber plug 5, the base 52 has a fixing function on the rubber plug 5, and the base 52 has a sealing effect by closely contacting with the main casing 1. The external diameter of cylinder 53 can set up to slightly be greater than the aperture of first through-hole 11 to make cylinder 53 can take place deformation to a certain extent, thereby seal first through-hole 11, also fix plug 5 in first through-hole 11 simultaneously.

Further, the outer diameter of the bus bar 4 passing through one end of the rubber plug 5 is larger than the aperture of the second through hole 51, so that the bus bar 4 blocks the second through hole 51 to seal the battery. In addition, when the one end of piece 4 that converges passed plug 5, can also make plug 5 take place slight inflation to make plug 5 fix more firmly on first through-hole 11, also improved the leakproofness of battery.

As shown in fig. 4, the core package 3 includes a core package body 31 and a connecting sheet 32, the connecting sheet 32 may be a part of the core package 3 where the tabs extend out of the core package body 31, or may be separately disposed, a clamping groove is opened at one end of the bus bar 4 connected to the connecting sheet 32, and the connecting sheet 32 may be inserted into the clamping groove, so that the bus bar 4 is connected to the connecting sheet 32 to realize a relatively firm connection.

In some embodiments, a sealant is disposed between the base 52 and the main housing 1, so that the rubber plug 5 cannot rotate in the first through hole 11, and thus better sealing is achieved.

Further, a sealant is arranged between the confluence piece 4 and the rubber plug 5, so that the sealing performance of the battery is further improved.

Preferably, the two first through holes 11 are opened at the same side or different sides of the main housing 1. According to the core packages 3 of different types and different structures, the arranging positions of the first through holes 11 can be flexibly selected, so that the junction piece 4 and the core packages 3 are conveniently connected, the connection difficulty is reduced, and the connection reliability is improved.

As shown in fig. 2 and 4, the main casing 1 preferably has a liquid pouring hole 12, and the liquid pouring hole 12 is preferably provided with a seal nail 13. Electrolyte is injected into the battery through the injection hole 12, and the sealing nail 13 is used for sealing the injection hole 12.

Further, the liquid injection hole 12 is formed on the side opposite to the extending direction of a tab (not shown) of the core pack 3, so that the core pack 3 can be directly soaked by the electrolyte, and the soaking speed of the core pack 3 by the electrolyte is increased.

Preferably, the rim of the main housing 1 is provided with a flange 14, and the rim of the cover plate 2 is connected to the flange 14. The flange 14 has a certain area, so that a larger connection area is formed between the cover plate 2 and the main housing 1, thereby facilitating the connection between the main housing 1 and the cover plate 2, reducing the connection difficulty and improving the connection reliability.

In other embodiments, the liquid injection hole 12 functions as the first through hole 11, so that the number of holes can be reduced, which is beneficial to simplifying the process, improving the production efficiency and reducing the cost.

Further, the edge of the lid plate 2 is welded or bonded to the flange 14. The connection form of welding or bonding can be flexibly selected according to the material characteristics of the main housing 1 and the cover plate 2.

Preferably, the main housing 1 and the cover 2 are both metal. Since metal has high strength, the main case 1 and the cover 2 can be made thin, reducing the volume and weight of the battery, and improving the energy density of the battery. The main housing 1 can be manufactured by a stamping method, and has low cost and high manufacturing efficiency.

As a preferred embodiment of the present invention, in the description of the present specification, reference to the description of the terms "preferred", "further" or the like means that a particular feature, structure, material, or characteristic described in connection with the example or illustration is included in at least one example or illustration of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are only used to illustrate the detailed embodiments of the present invention, and the present invention is not limited to the above detailed embodiments, i.e. the present invention must not be implemented depending on the detailed embodiments. It should be clear to those skilled in the art that any improvement of the present invention, to the equivalent replacement of each raw material of the present invention, the addition of auxiliary components, the selection of specific modes, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. The utility model provides a lithium ion battery, its characterized in that, includes main casing body, cover plate, core package, at least one piece and at least one plug converge, one side opening of main casing body, the cover plate closing cap the opening side of main casing body, the core package sets up the main casing body with the intracavity that holds that the cover plate formed, at least one first through-hole has been seted up on the main casing body, the plug sets up in the first through-hole, the second through-hole has been seted up on the plug, converge the one end of piece with the core package is connected, the other end of the piece that converges passes the second through-hole and extends to outside the main casing body.

2. The lithium ion battery of claim 1, wherein the rubber plug comprises a base and a cylinder, the outer diameter of the cylinder is smaller than the outer diameter of the base, the base is disposed in the accommodating cavity, one side of the base is attached to the inner wall of the main housing, and the cylinder extends out of the main housing.

3. The lithium ion battery of claim 2, wherein an outer diameter of the bus bar passing through one end of the rubber plug is larger than an aperture of the second through hole.

4. The lithium ion battery of claim 3, wherein a sealant is disposed between the base and the main housing.

5. The lithium ion battery of claim 3, wherein a sealant is disposed between the bus bar and the plug.

6. The lithium ion battery of claim 1, wherein the number of the first through holes is two, and the two first through holes are opened on the same side or different sides of the main housing.

7. The lithium ion battery of claim 1, wherein an edge of the main housing is provided with a flange, and an edge of the cover sheet is connected to the flange.

8. The lithium ion battery of claim 7, wherein an edge of the cover sheet is welded or bonded to the flange.

9. The lithium ion battery of claim 1, wherein the main housing has a liquid injection hole, and the liquid injection hole is provided with a sealing nail.

10. The lithium ion battery of claim 1, wherein the main housing and the cover are both metal.