CN218274828U

CN218274828U - Laminated battery structure

Info

Publication number: CN218274828U
Application number: CN202222176207.7U
Authority: CN
Inventors: 朱永辉; 卿艳华; 刘仕臻; 吕品风
Original assignee: Sunwoda Electronic Co Ltd
Current assignee: Sunwoda Electronic Co Ltd
Priority date: 2022-08-17
Filing date: 2022-08-17
Publication date: 2023-01-10
Anticipated expiration: 2032-08-17

Abstract

The utility model provides a stacked battery structure belongs to battery technical field, include: the battery comprises at least two battery cells which are arranged in a laminated manner, wherein the end parts of the battery cells are provided with tabs; in two adjacent battery cells, a first tab of a first battery cell extends towards the direction of a second battery cell, and a second tab of the second battery cell extends towards the direction of the first battery cell, so that the first tab and the second tab are connected in a laminated manner; the protection plates are tiled at one ends, provided with lugs, of the two adjacent battery cells, and the lower surfaces of the protection plates are electrically connected with the first lugs and the second lugs which are connected in a laminated mode; the utility model discloses a range upon range of battery structure with the protection shield tiling on two blocks of range upon range of electric cores, utilizes the thickness of two electric cores, has avoided bending of protection shield to the battery size after the encapsulation has been reduced.

Description

Laminated battery structure

Technical Field

The utility model relates to the technical field of batteries, concretely relates to stacked battery structure.

Background

In a conventional soft-package polymer lithium ion battery, a single battery core is generally adopted for packaging, tabs exposed at the end part of the battery core are all sheet tabs, an aluminum foil sheet is used as an anode, and a nickel sheet is used as a cathode. The sheet-shaped tab is welded with the collision sheet on the PCM plate (protection plate), and then the protection plate is vertically folded into the groove of the cell, resulting in a larger size of the battery.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the encapsulation battery among the prior art, because the protection shield needs vertical book to the recess of electric core in, lead to the great defect of size of battery to a lamination battery structure is provided.

In order to solve the technical problem, the utility model provides a stacked battery structure, include:

the battery comprises at least two battery cells which are arranged in a laminated manner, wherein the end parts of the battery cells are provided with tabs;

in two adjacent battery cells, a first tab of a first battery cell extends towards the direction of a second battery cell, and a second tab of the second battery cell extends towards the direction of the first battery cell, so that the first tab and the second tab are connected in a laminated manner;

the protection plates are tiled at one ends, provided with lugs, of the two adjacent battery cells, and the lower surfaces of the protection plates are electrically connected with the first lugs and the second lugs in a laminated connection mode.

Optionally, the protection plate comprises: the flexible circuit board is provided with a butt joint end which can be bent upwards by 90 degrees and is used for butt joint with a mobile phone interface.

Optionally, the first tab includes a first positive tab and a first negative tab, the second tab includes a second positive tab and a second negative tab, the first positive tab is connected to the second negative tab in a stacked manner, and the first negative tab is connected to the second negative tab in a stacked manner.

Optionally, the second tab has an extension section which is bent upward and then covers above the first tab, and the extension section of the first tab is connected with the extension section of the second tab by welding through a welding sheet.

Optionally, the welding tab is bent upward to cover the extending portion above the second tab, and the protection plate is connected to the second tab by welding through the extending portion of the welding tab.

Optionally, two adjacent battery cores are connected through gluing.

Optionally, the end portions of the two adjacent electric cores with the tabs are wrapped and bonded by double faced adhesive tapes.

Optionally, the double-sided tape is at least partially disposed under the protection plate, and an upper surface of the double-sided tape is bonded to the protection plate.

Optionally, an elastic pad is disposed between the protection plate and the end of the battery cell.

Optionally, the elastic pad is tiled between the positive electrode tab and the negative electrode tab on one battery cell.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a range upon range of battery structure, protection shield and utmost point ear welding can be after together smooth place at range upon range of two electric core tops, utilize the thickness of two electric cores, avoided bending of protection shield to reduce the battery size after the encapsulation, under the unidimensional, improved the capacity of battery relatively.

2. The utility model provides a range upon range of battery structure, flexible line way board can make progress the right angle and buckle 90, can accomplish the cell-phone assembly with ascending butt joint end and the butt joint of cell-phone interface position, has reduced unnecessary process.

3. The utility model provides a range upon range of battery structure, the direct tiling of protection shield is on the top of electric core to adopt the double faced adhesive tape to carry out the fixed of great area, thereby effectual bonding protection shield and battery.

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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it will be obvious to those skilled in the art that the embodiments of the present invention are not necessary to provide creative work before

Fig. 1 is a perspective view of one embodiment of a stacked battery structure provided in an embodiment of the present invention.

Fig. 2 is a front view of fig. 1.

Fig. 3 isbase:Sub>A cross-sectional view taken along linebase:Sub>A-base:Sub>A of fig. 2.

Fig. 4 is a perspective view of the protective plate of fig. 1.

Fig. 5 is an exploded view of the protection plate and the battery cell.

Description of the reference numerals:

1. a first cell; 2. a second cell; 3. a protection plate; 4. double-sided adhesive tape; 5. an elastic pad; 6. a first tab; 7. a second tab; 8. welding the sheet; 9. a circuit board; 10. a flexible wiring board.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood 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 belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

The laminated battery structure provided by the embodiment can be used for mobile phone batteries, and particularly can be used for soft-package polymer lithium ion batteries.

As shown in fig. 1, fig. 4, and fig. 5, a specific implementation of a stacked battery structure provided in this embodiment includes: the battery comprises two battery cores which are arranged in a stacked mode, wherein the end parts of the battery cores are provided with lugs; in two adjacent battery cells, a first tab 6 of a first battery cell 1 extends towards a second battery cell 2, and a second tab 7 of the second battery cell 2 extends towards the first battery cell 1, so that the first tab 6 and the second tab 7 are connected in a stacked manner; the protection plates 3 are tiled at one ends, provided with tabs, of the two adjacent battery cells, and the lower surfaces of the protection plates 3 are electrically connected with the first tabs 6 and the second tabs 7 which are connected in a stacked mode.

According to the stacked battery structure provided by the embodiment, the protection plate can be flatly placed on the tops of the two stacked battery cores after being welded with the lugs, and the protection plate is prevented from being bent by utilizing the thicknesses of the two battery cores, so that the size of a packaged battery is reduced, and the capacity of the battery is relatively improved under the same size.

As an alternative embodiment, the battery core may be stacked in more pieces.

As shown in fig. 1, the protection plate 3 includes: the mobile phone comprises a circuit board 9 and a flexible circuit board 10 connected to the circuit board 9, wherein the flexible circuit board 10 is provided with a butt joint end capable of being bent upwards by 90 degrees so as to be used for butt joint with a mobile phone interface position. The mobile phone can be assembled by butting the butt joint end with the mobile phone interface, so that redundant processes are reduced.

As shown in fig. 2 and fig. 3, in the stacked battery structure provided in this embodiment, in two adjacent battery cells, the first tab 6 includes a first positive tab and a first negative tab, and the second tab 7 includes a second positive tab and a second negative tab, where the first positive tab is stacked and connected with the second negative tab, and the first negative tab is stacked and connected with the second negative tab. In addition, as a preferred embodiment, the second tab 7 has an extension section which is bent upward and then covers the first tab 6, and the extension sections of the first tab 6 and the second tab 7 are welded and connected by a welding piece 8.

As shown in fig. 2 and 3, in the stacked battery structure provided in this embodiment, the welding tab 8 has an extension bent upward and covering the second tab 7, the protection plate 3 is connected to the second tab 7 by welding via the extension of the welding tab 8, and the problem of damage to the device due to excessive temperature when the protection plate 3 is welded to the second tab 7 can be avoided by the isolation of the welding tab 8. Specifically, in this embodiment, the protection shield 3 with can adopt laser spot welding to connect between the second utmost point ear 7, adopt laser spot welding to connect, efficient, the productivity is fast, can promote the steadiness of connecting simultaneously. In addition, other conventional welding methods can be adopted for connection, such as: ultrasonic welding, and the like.

As shown in fig. 1, in the stacked battery structure provided in this embodiment, two adjacent battery cells are connected by gluing. Specifically, the end parts of the two adjacent battery cells with the tabs are coated and bonded through a double-sided adhesive tape 4. In addition, as an alternative embodiment, other conventional gluing methods can be used for connection.

As shown in fig. 1, in the stacked battery structure provided in this embodiment, the double-sided tape 4 is at least partially disposed below the protection plate 3, the upper surface of the double-sided tape 4 is bonded to the protection plate 3, and the protection plate 3 is fixed to the double-sided tape 4 in a relatively large area, so as to effectively bond the protection plate 3 and the battery.

As shown in fig. 1 and fig. 2, in the stacked battery structure provided in this embodiment, an elastic pad 5 is disposed between the protection plate 3 and the end portion of the battery cell, and the elastic pad 5 can support a gap between the protection plate 3 and the end portion of the battery cell, so as to improve the overall stability of the product. Specifically, the elastic pad 5 tiles between the positive electrode tab and the negative electrode tab on the battery cell, and the elastic piece is located in the middle of the protection plate 3, so that the stability of the protection plate 3 on the battery cell is improved. The elastic pad 5 adopted in the embodiment is a silica gel pad, and in addition, as an alternative embodiment, other conventional elastic pads 5 can also be adopted.

The packaging method of the laminated battery structure provided by the embodiment comprises the following steps:

two electric cores are stacked and fixed by a double-faced adhesive tape 4.

Bending the lug of the first battery cell 1 towards the direction of the second battery cell 2, so that the lug of the first battery cell 1 is flatly paved at the top end of the second battery cell 2; bend the utmost point ear of second electricity core 2 towards the direction of first electricity core 1, make the parallel lid of utmost point ear of second electricity core 2 on the utmost point ear of first electricity core 1, promptly: the positive electrode tabs of the two battery cores are attached together, and the negative electrode tabs are attached together.

And (3) extending the part of the welding sheet 8 which is turned over by 90 degrees into the space between the two pole lugs which are mutually attached, and then carrying out welding connection.

And then the welding sheet 8 is turned over by 90 degrees, so that the part of the welding sheet 8 is attached to the upper surface of the second lug 7 in parallel, and is welded on the collision sheet of the protection plate 3 through the welding sheet 8, and a silica gel pad is arranged on the collision sheet.

And (4) flatly laying the protection plate 3 on the top of the battery cell to finish the process assembly.

The packaging structure with the double electric cores stacked up and down provided by the embodiment adopts the layout that the protective plate 3 is laid down, so that more favorable space is reserved for the layout of the whole machine, the capacity of a battery can be increased, the whole machine with higher memory can be developed, and the pain point with insufficient traditional space is effectively treated. Because the space of the battery capacity is increased, the availability of the battery is greatly improved in the limited space, the repeatable availability of key materials of the PACK end is improved, the whole process flow is simple, the cost pressure is greatly reduced, and the installation reliability of the whole machine end is improved.

The packaging structure with the double electric cores overlapped up and down provided by the embodiment does not change the quantity of materials, and only makes some modifications on the size, so that the capacity of the battery is greatly enlarged. In addition, the protection board 3 of the common soft package polymer lithium ion battery has the risk of falling failure, the reason is that the battery is connected with the battery compartment through the double faced adhesive tape 4, and under the condition of weak bonding, the protection board 3 is vertically placed with the battery to shift in the compartment to cause the falling failure. The laminated battery structure that this embodiment provided lets protection shield 3 lie flat at the battery head and places to adopt upper and lower superimposed packaging mode, area of contact is big, has effectively solved the problem that battery, protection shield 3 rocked that arouse by the inhomogeneous of atress.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.

Claims

1. A stacked cell structure, comprising: the battery comprises at least two battery cells which are arranged in a stacked mode, wherein the end parts of the battery cells are provided with tabs;

in two adjacent battery cells, a first tab (6) of a first battery cell (1) extends towards the direction of a second battery cell (2), and a second tab (7) of the second battery cell (2) extends towards the direction of the first battery cell (1), so that the first tab (6) and the second tab (7) are connected in a laminated manner;

the protection plates (3) are tiled at the ends, provided with the lugs, of the two adjacent battery cells, and the lower surfaces of the protection plates (3) are electrically connected with the first lugs (6) and the second lugs (7) in a laminated connection mode.

2. The laminated battery structure according to claim 1, wherein the protective plate (3) comprises: the mobile phone comprises a circuit board (9) and a flexible circuit board (10) connected to the circuit board (9), wherein the flexible circuit board (10) is provided with a butt joint end which can be bent upwards by 90 degrees and is used for butt joint with a mobile phone interface position.

3. The laminated battery structure according to claim 1, wherein the first tab (6) comprises a first positive tab and a first negative tab, and the second tab (7) comprises a second positive tab and a second negative tab, the first positive tab being connected to the second negative tab in a laminated manner, and the first negative tab being connected to the second negative tab in a laminated manner.

4. The laminated battery structure according to claim 1, characterized in that the second tab (7) has an extension bent upward to cover the first tab (6), and the first tab (6) and the extension of the second tab (7) are welded together by a welding tab (8).

5. The stacked battery structure according to claim 4, wherein the welding tab (8) has an extension bent upward to cover above the second tab (7), and the protective plate (3) is welded to the second tab (7) through the extension of the welding tab (8).

6. The laminated battery structure according to any one of claims 1 to 5, wherein adjacent two of the cells are connected by gluing.

7. The laminated battery structure of claim 6, wherein the ends of two adjacent cells with the tabs are coated and bonded by a double-sided adhesive tape (4).

8. The laminated battery structure according to claim 7, wherein the double-sided adhesive tape (4) is provided at least partially under the protective sheet (3), and an upper surface of the double-sided adhesive tape (4) is adhesively bonded to the protective sheet (3).

9. The laminated battery structure according to any one of claims 1 to 5, characterized in that an elastic pad (5) is provided between the protective plate (3) and the end of the cell.

10. The laminated battery structure of claim 9, wherein the resilient pad (5) is laid flat between a positive tab and a negative tab on one of the cells.