CN114361737A

CN114361737A - Battery and electronic device using same

Info

Publication number: CN114361737A
Application number: CN202011050885.8A
Authority: CN
Inventors: 谢建; 马武
Original assignee: Ningde Amperex Technology Ltd
Current assignee: Ningde Amperex Technology Ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2022-04-15

Abstract

A battery includes a cell and a case. The battery cell comprises a battery cell body, a lug connected with the battery cell body and a switching piece connected with the lug. The casing includes the holding the first holding portion of electricity core body and connect first holding portion is in order to seal the banding of electricity core main part, wherein, the adaptor piece is followed the banding extends to along first direction outside the casing. The shell further comprises a second accommodating part, the second accommodating part is connected between the first accommodating part and the sealing edge, the second accommodating part accommodates the pole lug and the connecting structure of the adapter plate, and the safety of the battery is improved. The application also provides an electronic device using the battery.

Description

Battery and electronic device using same

Technical Field

The application relates to a battery and an electronic device using the battery.

Background

The battery has many advantages of large energy density, long cycle life, high nominal voltage, low self-discharge rate, small volume, light weight, etc., and has wide application in the field of consumer electronics. And current battery is when encapsulating electric core through the plastic-aluminum membrane, and the top banding includes the seal district and connects the not seal district between the holding portion of seal district and holding electric core. The non-sealed area occupies the whole side of the sealed area, has larger area, causes bad appearance of the battery and easy damage when being bulged, and simultaneously influences the sealing strength of the top seal.

Disclosure of Invention

In view of the above, it is desirable to provide a battery with improved safety.

It is also necessary to provide an electronic device using the above battery.

The application provides a battery, which comprises a battery core and a shell. The battery cell comprises a battery cell body, a lug connected with the battery cell body and a switching piece connected with the lug. The casing includes the holding the first holding portion of electricity core body and connect first holding portion is in order to seal the banding of electricity core main part, wherein, the adaptor piece is followed the banding extends to along first direction outside the casing. The shell further comprises a second accommodating part, the second accommodating part is connected between the first accommodating part and the sealing edge, and the second accommodating part accommodates the connecting structure of the pole lug and the adapter plate.

As an aspect of the present application, the sealing edge includes a sealing region and a transition region connecting the sealing region, where the transition region is located at a side of the sealing region close to the first accommodating portion to connect the first accommodating portion or the second accommodating portion. The transition region is unsealed, and a width of the transition region is less than a width of the second receptacle in the first direction.

As an aspect of the present application, a width of the transition zone is less than or equal to 2.5 mm.

As an aspect of the present application, a cross-section of the second receiving portion in a direction along a plane of the tab has a rectangular shape, a trapezoidal shape, a semicircular shape, or a semi-elliptical shape.

As one aspect of the present application, a width of the seal region in the first direction is 0.5mm to 30 mm.

As a scheme of this application, utmost point ear includes first utmost point ear and second utmost point ear, first utmost point ear with the second utmost point ear interval. The adapter plate comprises a first adapter plate connected with the first pole lug and a second adapter plate connected with the second pole lug. The battery comprises two second accommodating parts which are respectively and correspondingly accommodate the connecting structure of the first tab and the first adapter sheet and the connecting structure of the second tab and the second adapter sheet.

As one aspect of the present application, the two second receiving portions have the same or different shapes of cross sections in the direction of the plane of the first tab.

As an aspect of the present application, the widths of the two second receiving portions in the first direction are the same or different.

As an aspect of the present application, the width of the second accommodating part in the first direction is 5mm to 10 mm.

An electronic device of the present application includes a battery as described above.

The battery of this application, through corresponding utmost point ear sets up the second holding portion is acceptd utmost point ear with the connection structure of switching piece avoids first holding portion with the battery outward appearance that causes is bad for too much the swelling between the banding to reduce the risk because of the battery inefficacy that the regional easy damage that leads to of swelling leads to, promote the security of battery.

Drawings

Fig. 1 is a schematic perspective view of a battery according to an embodiment of the present disclosure.

Fig. 2 is a disassembled schematic view of a battery according to an embodiment of the present disclosure.

Fig. 3 is a schematic cross-sectional view of a battery according to an embodiment of the present application taken along the direction III-III.

Fig. 4 is a schematic cross-sectional view of a battery according to an embodiment of the present application taken along the direction IV-IV.

Fig. 5 is a side view of a battery according to an embodiment of the present application.

Fig. 6 is a side view of a battery according to another embodiment of the present application.

Fig. 7 is a schematic sectional view of a battery according to an embodiment of the present application taken along direction VII-VII.

Fig. 8 is a schematic cross-sectional view along direction VII-VII of a cell according to another embodiment of the present application.

Fig. 9 is a schematic sectional view along VII-VII of a battery according to still another embodiment of the present application.

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

Fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Description of the main elements

Battery 100

Battery cell 10

Housing 30

Cell body 11

Tab 13

Adapter sheet 15

First receptacle 31

Sealing edge 33

Second receptacle 35

First direction X

First tab 131

Second tab 133

First switching piece 151

Second interposer 153

Sealing area 332

Transition zone 334

Electronic device 200

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 to 10, a battery 100 includes a battery cell 10 and a casing 30. The battery cell 10 includes a battery cell body 11, a tab 13, and an adaptor sheet 15. One end of the tab 13 is connected to the cell body 11, and the other end of the tab is connected to the adaptor piece 15. The casing 30 includes a first accommodating portion 31 accommodating the cell body 11 and an edge seal 33 connecting the first accommodating portion 31 to seal the cell body 11. The interposer 15 is clamped in the sealing edge 33 and extends out of the housing 30 along the first direction X. The housing 30 further includes a second accommodating portion 35, the second accommodating portion 35 is connected between the first accommodating portion 31 and the sealing edge 33, and the second accommodating portion 35 is disposed corresponding to the tab 13 and accommodates a connection structure between the tab 13 and the interposer 15, that is, a welding position between the tab 13 and the interposer 15. By providing the connection structure corresponding to the tab 13, in which the second receiving portion 35 receives the tab 13 and the interposer 15, the appearance of the battery 100 is prevented from being poor due to excessive swelling between the first receiving portion 31 and the sealing edge 33, and the risk of failure of the battery 100 due to the easiness of breakage of a swelling area is reduced. Meanwhile, on the premise of a certain size of the battery, the larger the area occupied by the bulging area is, the smaller the area occupied by the cell body or the sealing edge is, the former leads to the reduction of the energy density of the battery, and the latter causes the insufficient mechanical strength of the sealing edge to be easily broken when being subjected to an external force (for example, falling).

Specifically, in some embodiments, the housing 30 may be made of aluminum plastic film. In other embodiments, the housing 30 may be made of other materials.

As shown in fig. 2 and 4, the second accommodating portion 35 communicates with the first accommodating portion 31.

In some embodiments, referring to fig. 5, the first accommodating portion 31 may protrude from two opposite sides of the sealing edge 33, i.e., the first accommodating portion 31 may be formed by a double pit. In some embodiments, referring to fig. 6, the first accommodating portion 31 may also protrude from only one side of the sealing edge 33, i.e. the first accommodating portion 31 may also be formed by a single pit.

In some embodiments, referring to fig. 5, the second accommodating portion 35 may protrude from two opposite sides of the sealing edge 33, i.e., the second accommodating portion 35 may be formed by a double pit. In some embodiments, referring to fig. 6, the second accommodating portion 35 may also protrude from only one side of the sealing edge 33, i.e. the second accommodating portion 35 may also be formed by a single pit.

The number of the tabs 13 may be two or more, and the number of the tabs 15 and the number of the second receiving portions 35 correspond to the number of the tabs 13, respectively.

Specifically, in some embodiments, referring to fig. 1 and 3, the tab 13 includes a first tab 131 and a second tab 133, wherein the first tab 131 and the second tab 133 are spaced apart. The interposer 15 includes a first interposer 151 connected to the first tab 131 and a second interposer 153 connected to the second tab 133. The battery 100 includes two second receiving portions 35, and respectively and correspondingly receives the connection structure between the first tab 131 and the first adaptor plate 151 and the connection structure between the second tab 133 and the second adaptor plate 153.

Referring to fig. 2, 7, 8 and 9, each of the second receiving portions 35 may have a rectangular, trapezoidal, semicircular, semi-elliptical or other regular or irregular shape in cross section along the plane of the corresponding tab 13. In one embodiment, the direction of the plane of the tab 13 is the direction IV-IV shown in fig. 1.

The cross-sectional shapes of the two second receiving portions 35 in the direction of the plane of the corresponding tab 13 may be the same or different.

The widths W of the two second accommodating portions 35 in the first direction X₁May be the same or different. Preferably, each second accommodating portion 35 has a width W in the first direction X₁Can be 5 mm-10 mm.

In some embodiments, referring to fig. 10, the seal 33 may further include a seal region 332 and a transition region 334 connecting the seal region 332.The transition region 334 is located at one side of the sealing region 332 close to the first accommodating portion 31 to connect the first accommodating portion 31 or the second accommodating portion 35, and the transition region 334 is not sealed to provide a buffer space when the battery 100 is impacted by an external force (e.g., falls), and also to provide a certain accommodating space when the battery 100 generates gas during use, so as to reduce the risk that the gas directly breaks the edge seal. A width W of the transition zone 334 in the first direction X₂Is smaller than the width W of the second accommodation part 35₁The risk of poor appearance and easy breakage caused by swelling is reduced in advance to guarantee the effectiveness of the edge sealing.

In some embodiments, the width W of the transition zone 334₂May be less than or equal to 2.5 mm.

In some embodiments, the width W of the seal region 332 in the first direction X₃Can be 0.5 mm-30 mm.

Referring to fig. 11, the battery 100 is applied to an electronic device 200, and the electronic device 200 may be a mobile phone, a tablet computer, an electronic reader, a notebook computer, a vehicle-mounted device, a wearable device, and the like. In this embodiment, the electronic device 200 is a mobile phone.

The battery 100 of this application, through corresponding utmost point ear 13 sets up second holding portion 35 is acceptd utmost point ear 13 with the connection structure of adaptor piece 15 avoids first holding portion 31 with the battery 100 outward appearance that causes is bad to the reduction is because of the regional fragile risk that leads to of swelling because of the battery 100 that swells between banding 33 is inefficacy. Meanwhile, on the premise of a certain size of the battery, the larger the area occupied by the bulge area is, the smaller the area occupied by the cell body or the sealing edge area in the battery is, the former causes the reduction of the energy density of the battery, and the latter causes the insufficient mechanical strength of the sealing edge to be easily broken when being subjected to an external force (for example, falling), so that the battery is disabled.

In addition, it is obvious to those skilled in the art that other various corresponding changes and modifications can be made according to the technical idea of the present application, and all such changes and modifications should fall within the protective scope of the present application.

Claims

1. A battery, comprising:

the battery cell comprises a battery cell body, a lug connected with the battery cell body and a switching piece connected with the lug;

a casing including a first accommodating portion for accommodating the cell body and a sealing edge connected to the first accommodating portion to seal the cell body, wherein the adaptor sheet extends from the sealing edge to the outside of the casing along a first direction,

the shell further comprises a second accommodating part, the second accommodating part is connected between the first accommodating part and the sealing edge, and the second accommodating part accommodates the connecting structure of the pole lug and the adapter plate.

2. The cell of claim 1, wherein the edge seal comprises a seal region and a transition region connecting the seal region, the transition region being located on a side of the seal region adjacent to the first receptacle to connect the first receptacle or the second receptacle, the transition region being unsealed, and a width of the transition region being less than a width of the second receptacle in the first direction.

3. The battery of claim 2, wherein the width of the transition region is less than or equal to 2.5 mm.

4. The battery according to claim 1, wherein the second receiving portion has a rectangular, trapezoidal, semicircular, or semi-elliptical shape in cross section in the direction of the plane of the tab.

5. The battery of claim 2, wherein the seal region has a width in the first direction of 0.5mm to 30 mm.

6. The battery of claim 1, wherein the tabs comprise a first tab and a second tab, the first tab and the second tab are spaced apart, the tabs comprise a first tab for connecting the first tab and a second tab for connecting the second tab, and the battery comprises two second receiving portions for receiving a connecting structure of the first tab and a connecting structure of the second tab and the second tab, respectively.

7. The battery according to claim 6, wherein the two second receiving portions have the same or different shapes in cross section in the direction of the plane of the first tab.

8. The battery of claim 6, wherein the widths of the two second receiving portions in the first direction are the same or different.

9. The battery according to any one of claims 1 to 8, wherein the second accommodating portion has a width in the first direction of 5mm to 10 mm.

10. An electronic device, characterized in that the electronic device comprises a battery according to any one of claims 1 to 9.