CN223501922U

CN223501922U - A single cell and a pouch cell assembly

Info

Publication number: CN223501922U
Application number: CN202422595598.5U
Authority: CN
Inventors: 赵恒鑫; 李至淼; 袁志山; 齐东荣; 窦鹏; 刘鹏程
Original assignee: Huizhou Yiwei New Energy Co ltd
Current assignee: Huizhou Yiwei New Energy Co ltd
Priority date: 2024-10-25
Filing date: 2024-10-25
Publication date: 2025-10-31
Anticipated expiration: 2034-10-25

Abstract

This utility model embodiment provides a single battery cell and a pouch battery pack assembly. The single battery cell includes: a cell, a fixing plate, tabs, and a support block. The cell is disposed on the fixing plate, and the tabs extend from the top of the cell and are bent in a "C" shape at the top of the fixing plate. A receiving groove is formed between the fixing plate and the bent tabs. The support block is disposed in the receiving groove to support the tabs. Through the above arrangement, the combination of the fixing plate, tabs, and support block can enhance the stability of the tabs and keep them on the same horizontal plane. While improving the stability of the tabs, it is also beneficial for laser welding of the tabs in series and parallel, improving welding efficiency and welding effect. Furthermore, it can improve the production efficiency of pouch battery pack assembly and realize fully automated production line assembly of pouch batteries.

Description

Single battery and soft package battery group

Technical Field

The utility model relates to the technical field of batteries, in particular to a single battery and a soft package battery group.

Background

With the rapid development of intelligent manufacturing, various industries are gradually upgraded and transformed. In the lithium battery industry, the soft package battery has the advantages of light weight, high safety, long service life and the like, and is widely applied to various fields such as mobile power supplies, electric bicycles, unmanned aerial vehicles, notebook computers and the like.

Under the condition that the demand of the soft package battery group is gradually increased, the soft package battery group is likely to adopt a full-automatic production line, and the current lithium battery industry generally adopts soldering in a soft package battery tab series-parallel connection mode. The soldering process needs to control the soldering time, increase the connecting plate, damage the battery due to long-time high Wen Rongxi, and difficult to realize full-automatic production, so that the grouping mode is different from the traditional manufacturing process.

Disclosure of utility model

The utility model aims to solve the defects in the prior art and provides a single battery and a soft package battery.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

In a first aspect, an embodiment of the utility model provides a single battery, which comprises a battery cell, a fixing plate, a tab and a supporting block, wherein the battery cell is arranged on the fixing plate, the tab extends from the top end of the battery cell and is bent and arranged at the top end of the fixing plate in a C shape, an accommodating groove is formed between the fixing plate and the bent tab, and the supporting block is arranged in the accommodating groove and used for supporting the tab.

In a preferred embodiment of the present utility model, the support block is made of an insulating material.

As a preferred embodiment of the utility model, the supporting block comprises a limit groove, the width of the limit groove is the same as that of the tab, and the tab is clamped in the limit groove.

As a preferred embodiment of the utility model, the tab comprises a first folded edge, the first folded edge is clamped in the limiting groove, and the limiting groove is connected with the first folded edge through back glue.

As a preferred embodiment of the utility model, the tab comprises a positive tab and a negative tab, the limit groove comprises a positive tab limit groove and a negative tab limit groove, and the positive tab and the negative tab are respectively clamped in the positive tab limit groove and the negative tab limit groove.

As a preferable embodiment of the utility model, the positive electrode lug and the negative electrode lug are nickel-base alloy materials subjected to nickel conversion treatment.

As a preferred embodiment of the present utility model, the fixing plate includes a base, a second flange and a third flange, which are disposed at left and right sides of the base.

In a second aspect, the embodiment of the utility model further provides a soft package battery pack, which comprises a battery cell module and a connecting plate;

The cell module comprises a single cell as described in any of the embodiments of the present utility model;

The lugs of the plurality of single batteries face to the same side;

The connecting plate is connected to the lugs of the plurality of single batteries.

As a preferred embodiment of the present utility model, the connection plate includes a connection plate frame and a bus bar disposed between the connection plate frame and the tab, and the bus bar is welded to the tab.

As a preferred embodiment of the present utility model, the connection plate frame is provided with a plurality of through holes at positions where the bus bar is provided, and the bus bar is exposed through the through holes.

Compared with the prior art, the utility model has the advantages and positive effects that:

According to the technical scheme provided by the embodiment of the utility model, in the first aspect, the fixing plate, the lug and the supporting block are combined, so that the stability of the lug can be enhanced, the lug is kept on the same horizontal plane, the stability of the lug is improved, and meanwhile, the series-parallel connection of the lug is facilitated, and the welding efficiency and the welding effect are improved. According to the second aspect, through the fixing of the battery lugs, when the soft package batteries are produced to be groups, the connecting plates are convenient to be in close contact with the lugs, and the lugs can be connected in series and parallel under the condition of directly using laser welding, so that the production efficiency of the soft package batteries to be groups is improved, and the soft package batteries can be groups by the full-automatic production line.

Drawings

Fig. 1 is a schematic structural diagram of a single battery provided by the utility model;

Fig. 2 is a schematic diagram of an explosion structure of a single battery according to the present utility model;

fig. 3 is a schematic structural diagram of a soft package battery pack according to the present utility model;

Fig. 4 is an exploded view of a connecting plate according to the present utility model.

Detailed Description

In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be rendered by reference to the appended drawings and examples. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced otherwise than as described herein, and therefore the present utility model is not limited to the specific embodiments of the disclosure that follow.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1-2, an embodiment of the present utility model provides a single battery 100, which includes a battery cell 110, a fixing plate 120, a tab 130 and a supporting block 140, wherein the battery cell 110 is disposed on the fixing plate 120, the tab 130 extends from a top end of the battery cell 110 and is bent and disposed at a top end of the fixing plate 120 in a "C" shape, a receiving groove 150 is formed between the fixing plate 120 and the bent tab 130, and the supporting block 140 is disposed in the receiving groove 150 and is used for supporting the tab 130.

The arrangement combination and the connection mode among the single batteries can be flexibly set according to the requirements of the battery cell module.

According to the technical scheme, through the arrangement, the stability of the electrode lugs can be enhanced by combining the fixing plate, the electrode lugs and the supporting blocks, the electrode lugs are kept on the same horizontal plane, the stability of the electrode lugs is improved, meanwhile, the series-parallel connection laser welding of the electrode lugs is facilitated, the welding efficiency and the welding effect are improved, further, the production efficiency of the soft package battery grouping can be improved, and the soft package battery grouping by a full-automatic production line is realized.

As a preferred embodiment of the present utility model, the supporting block is made of an insulating material, so as to avoid electrical conduction. Further, the supporting block is made of an insulating material with certain hardness, such as plastic or resin, so as to support the tab.

As a preferred embodiment of the present utility model, referring to fig. 1-2, the supporting block 140 includes a limiting groove 141, the width of the limiting groove 141 is the same as the width of the tab 130, and the tab 130 is clamped in the limiting groove 141. Through setting up the spacing groove can avoid the utmost point ear rocks about, the location of the utmost point ear of being convenient for and further the automation of the soft packet of battery of being convenient for is organized.

As a preferred embodiment of the present utility model, referring to fig. 1-2, the tab 130 includes a first folded edge 131, the first folded edge 131 is clamped in the limiting groove 141, and the limiting groove 141 is connected with the first folded edge 131 through a back adhesive. The shaking and displacement of the tab are further avoided by arranging the back adhesive.

As a preferred embodiment of the present utility model, referring to fig. 1-2, the tab 130 includes a positive tab 132 and a negative tab 133, the limiting groove 141 includes a positive tab limiting groove 142 and a negative tab limiting groove 143, and the positive tab 132 and the negative tab 133 are respectively clamped in the positive tab limiting groove 142 and the negative tab limiting groove 143. The serial-parallel connection mode between the positive electrode lug and the negative electrode lug of the single battery can be flexibly set according to the requirement on the battery cell module.

As a preferable embodiment of the utility model, the positive electrode lug and the negative electrode lug are nickel-base alloy materials subjected to nickel conversion treatment. The nickel conversion treatment is to convert the aluminum tab into nickel, and the surface treatment is performed on the tab to convert the metal surface into a nickel-based alloy layer, so that the performances of corrosion resistance, wear resistance and the like of the tab can be improved.

As a preferred embodiment of the present utility model, referring to fig. 1-2, the fixing plate 120 includes a bottom 121, a second flange 122 and a third flange 123, and the second flange 122 and the third flange 123 are disposed at left and right sides of the bottom 121. The fixing of the battery cell can be enhanced by the arrangement, the left and right fixing of the supporting block is also enhanced, and the displacement of the supporting block is avoided.

In a second aspect, referring to fig. 3-4, an embodiment of the present utility model further provides a soft pack battery pack, including a cell module 1 and a connection plate 2;

The battery module 1 comprises a single battery 100 according to any embodiment of the present utility model;

The lugs of the plurality of single batteries 100 face to the same side;

The connection plate 2 is connected to the tabs of the plurality of unit batteries 100. As a preferred embodiment of the present utility model, referring to fig. 4, the connection plate 2 includes a connection plate frame 210 and a bus bar 220, the bus bar 220 is disposed between the connection plate frame 210 and the tab 130, and the bus bar 220 is welded to the tab. The size and the shape of the confluence sheet are flexibly set according to requirements. One surface of the busbar 220 is connected with the tab by laser welding, and the other surface of the busbar 220 is tightly attached to the bottom side of the connecting plate frame 210.

As a preferred embodiment of the present utility model, referring to fig. 4, the connection plate frame 210 is provided with a plurality of through holes 211 at positions where the bus bar 220 is provided, and the bus bar 220 is exposed through the through holes 211. It is known that the connecting plate frame is made of insulating materials. Thereby realizing the connection between the battery and the external equipment and supplying power to the external equipment.

By adopting the arrangement, when the soft package batteries are produced to be grouped, the lugs can be connected in series and parallel under the condition of directly using laser welding, so that the production efficiency of the soft package batteries to be grouped is improved, and the soft package batteries can be grouped by a full-automatic production line.

The present utility model is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present utility model without departing from the technical content of the present utility model still belong to the protection scope of the technical solution of the present utility model.

Claims

1. The single battery is characterized by comprising a battery core, a fixing plate, a tab and a supporting block, wherein the battery core is arranged on the fixing plate, the tab extends from the top end of the battery core and is bent and arranged at the top end of the fixing plate in a C shape, a containing groove is formed between the fixing plate and the bent tab, and the supporting block is arranged in the containing groove and used for supporting the tab.

2. The cell according to claim 1, wherein the support block is an insulating material.

3. The single battery of claim 1, wherein the support block comprises a limit groove, the width of the limit groove is the same as the width of the tab, and the tab is clamped in the limit groove.

4. The battery cell of claim 3, wherein the tab includes a first flange, the first flange is disposed in the limiting groove, and the limiting groove is connected with the first flange by a back adhesive.

5. The battery cell as defined in claim 4, wherein the tab includes a positive tab and a negative tab, the limiting groove includes a positive tab limiting groove and a negative tab limiting groove, and the positive tab and the negative tab are respectively clamped in the positive tab limiting groove and the negative tab limiting groove.

6. The battery cell of claim 5, wherein the positive electrode tab and the negative electrode tab are nickel-base alloy materials after the nickel conversion treatment.

7. The battery cell as recited in claim 1, wherein the fixing plate includes a base, a second fold and a third fold, the second fold and the third fold being disposed on left and right sides of the base.

8. The battery pack is characterized by comprising a battery cell module and a connecting plate;

the cell module comprising a plurality of cells according to any one of claims 1-7;

The lugs of the plurality of single batteries face to the same side;

9. The battery pack of claim 8, wherein the connection plate comprises a connection plate frame and a bus bar, the bus bar is disposed between the connection plate frame and the tab, and the bus bar is welded to the tab.

10. The battery pack according to claim 9, wherein the connection plate frame is provided with a plurality of through holes at positions where the bus plates are provided, and the bus plates are exposed through the through holes.