CN213636220U

CN213636220U - Battery and electronic device

Info

Publication number: CN213636220U
Application number: CN202023116341.5U
Authority: CN
Inventors: 谢顺; 曾加星; 欧阳兆华; 张燕婷
Original assignee: Dongguan Nvt Technology Co Ltd
Current assignee: Dongguan Nvt Technology Co Ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-07-06
Anticipated expiration: 2030-12-22

Abstract

A battery includes a cell. The battery cell comprises a shell, an electrode assembly arranged in the shell, and a first tab and a second tab electrically connected to the electrode assembly. The dimension D of the width direction and the dimension H of the thickness direction of the battery cell satisfy that: D/H is 1.2-10. The first pole lug and the second pole lug extend out of the shell and are respectively positioned at two ends of the battery cell in the length direction. The battery also comprises a protection plate arranged outside the shell, the protection plate comprises a first terminal and a second terminal, and the first lug and the second lug are electrically connected to the first terminal and the second terminal respectively. The application also provides an electronic device with the battery. The battery processing method and the battery processing device are beneficial to improving the safety and yield of the battery and reducing the processing difficulty.

Description

Battery and electronic device

Technical Field

The present disclosure relates to battery technologies, and particularly to a battery and an electronic device having the same.

Background

Batteries are widely used in electronic products such as electronic mobile devices and electric tools, and the requirements of people on the safety performance of the batteries are higher and higher. For some portable electronic products, the size of the battery also needs to be reduced accordingly due to the limitation of the internal space.

However, when the battery is small in size in the width direction, short circuit is easily caused due to a small distance between the positive and negative electrode tabs, which causes ignition or explosion of the battery, and reduces safety. Moreover, the smaller distance between the positive pole lug and the negative pole lug can also increase the welding risk of the lugs in the processing process, so that the processing is difficult, and the preparation yield of the battery can be reduced due to the insufficient welding area.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one of the above disadvantages of the prior art, it is necessary to provide a battery.

In addition, it is also necessary to provide an electronic device having the above battery.

The application provides a battery, including electric core. The battery cell comprises a shell, an electrode assembly arranged in the shell, and a first tab and a second tab electrically connected to the electrode assembly. The dimension D of the width direction and the dimension H of the thickness direction of the battery cell satisfy that: D/H is 1.2-10. The first pole lug and the second pole lug extend out of the shell and are respectively positioned at two ends of the battery cell in the length direction. The battery also comprises a protection plate arranged outside the shell, the protection plate comprises a first terminal and a second terminal, and the first lug and the second lug are electrically connected to the first terminal and the second terminal respectively.

In some possible implementation manners, a first platform and a second platform are respectively arranged at two ends of the battery cell in the length direction. The first pole lug is connected to the first platform, and the second pole lug is connected to the second platform. The protection plate is arranged on at least one of the first platform and the second platform.

In some possible implementations, the protective plate is disposed on the second platform. The first terminal and the second terminal are respectively arranged on two opposite surfaces of the protection plate, the first lug is connected with the first terminal through a first adapter, and the second lug is connected with the second terminal.

In some possible implementations, the protective plate is disposed on the second platform. The first terminal and the second terminal are arranged on the same surface of the protection plate. The first lug is connected with the first terminal through a first adapter. The second pole lug is connected with the second terminal through a second adapter.

In some possible implementations, the second adaptor includes a first adaptor portion, a second connector portion, and a second adaptor portion connected in sequence. The first transfer portion is electrically connected to the second terminal, and the second transfer portion is electrically connected to the second tab. The second connecting portion is arranged on the side face of the second platform.

In some possible implementations, the second adaptor includes a first adaptor portion, a third connector portion, a spacer portion, a fourth connector portion, and a second adaptor portion, which are connected in sequence. The first transfer portion is electrically connected to the second terminal. The second adapter portion is electrically connected to the second tab. The spacer is disposed between the second platform and the protection plate. The third connecting portion is arranged on the bottom surface of the protection plate, and the fourth connecting portion is arranged on the top surface of the second platform.

In some possible implementations, the protection plate includes a first portion, a second portion, and a first connection portion connecting the first portion and the second portion. The first terminal is provided at the first portion. The second terminal is provided at the second portion. The first connecting part is a flexible board or an electronic wire.

In some possible implementations, the first portion and the second portion are respectively located on two opposite surfaces of the second platform in the cell thickness direction.

In some possible implementations, the first portion is located on the first platform and the second portion is located on the second platform.

The present application also provides an electronic device comprising a battery as described above.

This application sets up first utmost point ear and second utmost point ear and is located both ends on length direction respectively, even if consequently electric core is less at width direction's size, also can reduce first utmost point ear and second utmost point ear because the problem that short circuit and welding risk are high easily in width direction interval is little, reduces the processing degree of difficulty, improves battery security and preparation yield. Moreover, because the battery of this application satisfies D/H1.2 ~ 10, compare in traditional cylindrical battery, applicable in the electron device that thickness is limited, and under the certain condition of size H of thickness direction, be favorable to improving battery capacity.

Drawings

Fig. 1 is an exploded view of a battery according to an embodiment of the present application.

Fig. 2 is a schematic view showing a structure of the assembled battery shown in fig. 1 (with the respective insulating tapes and labels removed).

Fig. 3 is an exploded view of a battery according to yet another embodiment of the present application.

Fig. 4 is a partial cross-sectional view of the battery shown in fig. 3.

Fig. 5 is an exploded view of another embodiment of the battery shown in fig. 3.

Fig. 6 is a partial cross-sectional view of the battery shown in fig. 5.

Fig. 7 is a schematic structural view of a second adaptor of the battery shown in fig. 5.

Fig. 8 is a schematic structural view of a protective plate in yet another embodiment of the battery shown in fig. 3.

Fig. 9 is a schematic structural view of a protective plate in yet another embodiment of the battery shown in fig. 3.

Fig. 10 is a schematic structural view of a battery according to still another embodiment of the present application.

Fig. 11 is a schematic structural view of a protective plate in another embodiment of the battery shown in fig. 10.

Fig. 12 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Description of the main elements

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1 and fig. 2, an embodiment of the present disclosure provides a battery 100 including a battery cell 10 and a protective plate 20. The battery cell 10 includes a casing 11, an electrode assembly (not shown) disposed in the casing 11, and a first tab 12 and a second tab 13 electrically connected to the electrode assembly. As shown in fig. 2, the battery cell 10 has a length direction, a width direction, and a thickness direction that are perpendicular to each other two by two. The dimension D in the width direction and the dimension H in the thickness direction of the battery cell 10 satisfy: D/H is 1.2-10. In some embodiments, battery 100 is a prismatic battery, D and H satisfy: D/H is 1.5-4.

The first tab 12 and the second tab 13 both extend out of the casing 11 and are respectively located at two ends of the battery cell 10 in the length direction (i.e., at the head and the tail of the battery cell 10, respectively). The protection plate 20 is disposed outside the housing 11. The protection board 20 includes a first terminal 21 and a second terminal (not shown in fig. 1 and 2). The first tab 12 and the second tab 13 are electrically connected to the first terminal 21 and the second terminal, respectively, so that the battery cell 10 is electrically connected to the protection plate 20.

This application sets up first utmost point ear 12 and second utmost point ear 13 and is located both ends on length direction respectively, even consequently even if electric core 10 is less at width direction's size, also can reduce first utmost point ear 12 and second utmost point ear 13 because the easy short circuit and the high problem of welding risk in width direction interval is little, reduces the processing degree of difficulty, improves battery 100 security and preparation yield. Furthermore, the battery 100 of the present application satisfies D/H1.2 to 10, and is applicable to an electronic device with a limited thickness compared to the conventional cylindrical battery 100, and is advantageous for increasing the capacity of the battery 100 when the dimension H in the thickness direction is constant.

In some embodiments, the battery cell 10 is provided with a first platform 111 and a second platform 112 at two ends in the length direction. The first tab 12 is attached to the first platform 111 and the second tab 13 is attached to the second platform 112. The protection plate 20 is disposed on at least one of the first and

second stages

111 and 112.

The battery cell 10 may be a soft-package battery cell, that is, the housing 11 is a packaging bag packaged by an aluminum plastic film. At this time, the case 11 includes a case body 110 for accommodating the electrode assembly and the electrolyte, first and second sealing edges connected to both ends of the case body 110 in the length direction, respectively, and third sealing edges 113 connected to both sides of the case body 110 in the width direction. The first and second seals are first and

second platforms

111 and 112, respectively. The first tab 12 and the second tab 13 respectively extend from the first platform 111 and the second platform 112, and are bent to the surfaces of the first platform 111 and the second platform 112. The first platform 111 and the end of the housing body 110 jointly enclose to form a first accommodating space 1110, and the second platform 112 and the end of the housing body 110 jointly enclose to form a second accommodating space 1120. The protection plate 20 is at least partially disposed in the first receiving space 1110 or the second receiving space 1120.

In other embodiments, the first platform 111 and the second platform 112 may also be brackets (not shown) fixed at the head and tail of the battery cell 10. The bracket may be used to secure the protective plate 20. The support may be made of an insulating material (e.g., plastic).

In some embodiments, the protective plate 20 is disposed on the second platform 112. The protection board 20 is a rigid-flex board, i.e., includes a hard board portion 22 and a flexible board portion 23 connected to the hard board portion 22. Where the hard plate portion 22 is used to arrange electronic components, the hard plate portion 22 may be double-sided, i.e., both opposing surfaces of the hard plate portion 22 may be provided with electronic components 28. The first terminal 21 and the second terminal are provided on the opposite surfaces of the hard plate portion 22, respectively. The first tab 12 bent to the surface of the first platform 111 is connected to the first terminal 21 by the first adaptor 30. The second tab 13 bent to the surface of the second land 112 faces the second terminal, so that the second tab 13 can be directly connected to the second terminal. Thus, the first tab 12 and the second tab 13 are electrically connected to the protection plate 20. Wherein the first terminal 21 and the second terminal may be pads. The flexible board portion 23 is provided with a connector 230, and the connector 230 is used to electrically connect the protection board 20 with an external element.

In other embodiments, the protection board 20 may also be a rigid circuit board.

The first adapter 30 may be a strip-shaped adapter nickel plate, and includes a first end 31, a second end 32 opposite to the second end 32, and a main body 33 connected between the first end 31 and the second end 32. The first end portion 31 and the second end portion 32 are each bent with respect to the main body portion 33 such that the first end portion 31 and the main body portion 33 are formed in a stepped shape, and the second end portion 32 and the main body portion 33 are also formed in a stepped shape. The first tab 12 is electrically connected to the first end 31, the second end 32 is electrically connected to the first terminal 21, and the main body 33 may be adhered to the housing body 110 by the adhesive layer 34. The first connecting piece 30 is strip-shaped, so that the first connecting piece has high plasticity and is convenient to bend to form a step shape, so that the first connecting piece 30 can be attached to the first terminal 21, the housing body 110 and the second terminal.

In preparation, the first tab 12 and the first end 31 of the first adaptor 30 are welded, and the first adaptor 30 is folded toward the second tab 13 side, so that the main body 33 is adhered to the surface of the housing body 110. The second tab 13 is welded to the second terminal of the protection plate 20, and the protection plate 20 is folded into the second receiving space 1120 formed by the second platform 112 and the end of the case body 110. Then, the second end portion 32 of the first transfer member 30 is welded to the first terminal 21, thereby completing the electrical connection between the first tab 12, the second tab 13, and the protection plate 20.

Referring to fig. 1, in some embodiments, the battery 100 further includes a first insulating tape 40. The first insulating tapes 40 are disposed at the head and tail of the battery cell 10. The first insulating tape 40 is used to electrically isolate the head and tail of the battery cell 10 from other elements (e.g., the protection plate 20, the first tab 12 or the second tab 13). Since the protection plate 20 is generally folded to the surface of the second sealing edge after being welded to the second tab 13 at the time of manufacturing, the first insulation tape 40 also serves to prevent the second sealing edge from being broken by the compression of the protection plate 20, thereby improving the safety performance of the battery 100.

Further, when the housing 11 is a packaging bag formed by packaging an aluminum plastic film, the battery 100 may further include a second insulating tape 41 covering a bent portion of the first tab 12 and the second tab 13, and the second insulating tape 41 may further cover exposed cross sections of the first sealed edge and the second sealed edge of the packaging bag. Since the aluminum-plastic film usually contains a metal layer, the second insulating adhesive tape 41 can form an insulating protection for the metal layer in the section area of the first sealing edge or the second sealing edge, and prevent the metal layer from communicating with other elements to cause a short-circuit fault.

Further, the battery 100 may further include a third insulating tape 42 wrapped outside the protective plate 20. The third insulating tape 42 serves to fix the protective plate 20 to the head of the battery cell 10, thereby improving the structural reliability of the battery 100.

In some embodiments, the battery 100 also includes a label sticker 60 disposed on the housing 11. The label sticker 60 may be provided with a code, and the code records identification information of the battery 100. The code may be a number, letter or a combination of numbers and letters with a specific rule.

Referring to fig. 3 and 4, another embodiment of the present application further provides a battery 200. The protection plate 20 is also provided to the second platform 112. The difference is that the protection plate 20 is a flexible circuit board. The first terminal 21 and the second terminal 27 are both disposed on a surface of the protection plate 20 away from the second platform 112. In order to increase the rigidity of the protective plate 20, the other surface of the protective plate 20 facing the second platform 112 is provided with a reinforcing plate 29. At this time, the protection plate 20 may be one-sided cloth, that is, an electronic component (not shown in fig. 3) may be disposed on the surface of the protection plate 20 where the reinforcing plate 29 is not disposed. The first tab 12 bent to the surface of the first platform 111 is connected to the first terminal 21 by the first adaptor 30. The second tab 13 bent to the surface of the second platform 112 is connected to the second terminal 27 through the second adaptor 50.

As shown in fig. 3, in some embodiments, the second adaptor 50 is substantially U-shaped, including a first adaptor portion 51, a second connector portion 53, and a second adaptor portion 52 connected in series. The first transfer portion 51 is electrically connected to the second terminal 27, and the second transfer portion 52 is electrically connected to the second pole ear 13. The second connection portion 53 is provided on a side surface of the second platform 112. That is, the second interposer 50 is bent from the side of the second platform 112 to electrically connect the second pole ear 13 to the second terminal 27. At this time, the battery 100 may further include a fourth insulating tape 43 at least covering the bent portion of the second adaptor 50.

As shown in fig. 5 to 7, the second adaptor 50 may also include a first adaptor portion 51, a third connector portion 54, a spacer portion 55, a fourth connector portion 56, and a second adaptor portion 52, which are connected in this order. The first transfer portion 51 is electrically connected to the second terminal 27. The second transfer portion 52 is electrically connected to the second pole ear 13. The spacer 55 is disposed between the second stage 112 and the protection plate 20. The third connecting portion 54 is disposed on the bottom surface of the protection plate 20, and the fourth connecting portion 56 is disposed on the top surface of the second platform 112. That is, the second interposer 50 may also be bent from the top surface of the second platform 112 to electrically connect the second pole ear 13 to the second terminal 27.

In other embodiments, as shown in fig. 8, in order to increase the cloth area of the protection plate 20, the protection plate 20 may include a first portion 24, a second portion 25, and a first connection portion 26 connecting the first portion 24 and the second portion 25. The first connection portion 26 may be bent such that the first portion 24 and the second portion 25 are respectively located on opposite surfaces of the second stage 112 in the thickness direction. The first connecting portion 26 is disposed on a side surface of the second platform 112. A first terminal 21 is provided at the first portion 24 and a second terminal 27 is provided at the second portion 25. That is, the protection plate 20 is bent from the side of the second stage 112 to electrically connect the second tab 13 to the second terminal 27. Further, the first connection portion 26 may be a flexible circuit board or an electronic wire.

Of course, as shown in fig. 9, the first connecting portion 26 may be disposed on the top surface of the second platform 112. That is, the protection plate 20 is bent from the top surface of the second stage 112 to electrically connect the second tab 13 to the second terminal 27. In this case, the second adaptor 50 may be omitted.

Referring to fig. 10, a battery 300 is further provided according to another embodiment of the present disclosure. The battery 300 of the present embodiment is different from the above-described embodiment in that the first adaptor 30 or the second adaptor 50 does not need to be additionally provided, and the adaptor function is implemented by the protection plate 20. The protection plate 20 includes a first portion 24, a second portion 25, and a first connection portion 26 connecting the first portion 24 and the second portion 25. The first portion 24 and the second portion 25 are located on a first platform 111 and a second platform 112, respectively. The first connecting portion 26 is attached to the housing body 110 by the adhesive layer 34. A first terminal (not shown in fig. 10) is provided on a surface of the first portion 24 facing the first platform 111, and a second terminal (not shown in fig. 10) is provided on a surface of the second portion 25 facing the second platform 112.

The present embodiment integrates the function of the adaptor on the protection plate 20, so that the first terminal on the first platform 111 and the second terminal on the second platform 112 can be directly electrically connected to the protection plate 20 without an additional adaptor. Because the adapter is eliminated, the welding times can be relatively reduced, and the process flow is simplified.

In some embodiments, first portion 24 and second portion 25 are both flexible circuit boards. In this case, both the first portion 24 and the second portion 25 are single-jersey pieces. One surface of each of the first portion 24 and the second portion 25 is provided with a reinforcing plate 29, and the first terminal, the second terminal, and the electronic component (not shown in fig. 10) are provided on the other surface of the first portion 24 and the second portion 25 on which the reinforcing plate 29 is not provided. In other embodiments, both the first portion 24 and the second portion 25 may be provided as rigid circuit boards; alternatively, one of the first portion 24 and the second portion 25 is a rigid circuit board and the other is a flexible circuit board. Referring to fig. 11, in other embodiments, the first portion 24 may be a rigid circuit board, and the second portion 25 may be a rigid-flex board.

The present application is applicable to all kinds of primary batteries, secondary batteries, fuel cells, or solar cells. In particular, the battery may be a lithium secondary battery including a lithium metal secondary battery, a lithium ion secondary battery, a lithium polymer secondary battery, and a lithium ion polymer secondary battery.

Referring to fig. 12, the present application further provides an electronic device 1 including the battery 100 (or the batteries 200 and 300). The electronic device 1 may be a consumer electronic product, such as a smart phone. It is understood that in other embodiments, the electronic device 1 may also be a power tool, an energy storage device, a power device, or the like.

Although the present application has been described in detail with reference to preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present application.

Claims

1. A battery comprising a cell, the cell comprising a housing, an electrode assembly disposed within the housing, and a first tab and a second tab electrically connected to the electrode assembly,

the dimension D of the width direction and the dimension H of the thickness direction of the battery cell satisfy that: D/H is 1.2-10;

the first lug and the second lug extend out of the shell and are respectively positioned at two ends of the battery cell in the length direction;

the battery also comprises a protection plate arranged outside the shell, the protection plate comprises a first terminal and a second terminal, and the first lug and the second lug are electrically connected to the first terminal and the second terminal respectively.

2. The battery of claim 1, wherein a first platform and a second platform are respectively disposed at two ends of the battery cell in the length direction, the first tab is connected to the first platform, the second tab is connected to the second platform, and the protection plate is disposed on at least one of the first platform and the second platform.

3. The battery of claim 2, wherein the protective plate is disposed on the second platform;

the first terminal and the second terminal are respectively arranged on two opposite surfaces of the protection plate, the first lug is connected with the first terminal through a first adapter, and the second lug is connected with the second terminal.

4. The battery of claim 2, wherein the protective plate is disposed on the second platform;

the first terminal and the second terminal are arranged on the same surface of the protection plate, the first lug is connected with the first terminal through a first adapter, and the second lug is connected with the second terminal through a second adapter.

5. The battery of claim 4, wherein the second adapter member includes a first adapter portion, a second connection portion and a second adapter portion connected in sequence, the first adapter portion is electrically connected to the second terminal, the second adapter portion is electrically connected to the second tab, and the second connection portion is disposed on a side surface of the second platform.

6. The battery of claim 4, wherein the second interposer includes a first interposer portion, a third interposer portion, a spacer portion, a fourth interposer portion and a second interposer portion connected in sequence, the first interposer portion is electrically connected to the second terminal, the second interposer portion is electrically connected to the second tab, the spacer portion is disposed between the second platform and the protection plate, the third interposer portion is disposed on a bottom surface of the protection plate, and the fourth interposer portion is disposed on a top surface of the second platform.

7. The battery according to claim 2, wherein the protection plate includes a first portion, a second portion, and a first connection portion connecting the first portion and the second portion, the first terminal being provided at the first portion, the second terminal being provided at the second portion; the first connecting part is a flexible board or an electronic wire.

8. The battery of claim 7, wherein the first portion and the second portion are respectively located on opposite surfaces of the second platform in the cell thickness direction.

9. The battery of claim 7, wherein the first portion is located on the first land and the second portion is located on the second land.

10. An electronic device characterized by comprising the battery according to any one of claims 1 to 9.