CN114747070B

CN114747070B - Battery, battery assembly, battery pack and electronic device

Info

Publication number: CN114747070B
Application number: CN202180006949.0A
Authority: CN
Inventors: 黄小钊; 李超鹏; 韦天华; 王华强
Original assignee: Dongguan Nvt Technology Co Ltd
Current assignee: Dongguan Nvt Technology Co Ltd
Priority date: 2020-06-30
Filing date: 2021-01-23
Publication date: 2024-03-19
Anticipated expiration: 2041-01-23
Also published as: CN114747070A

Abstract

A battery assembly comprises a battery core main body, a packaging film and a tab. The packaging film comprises a main body part, a top sealing edge and a side sealing edge. The main body part is used for coating the battery core main body and comprises a first surface, a second surface, a top wall and a side wall, wherein the first surface and the second surface are arranged opposite to each other, the top wall is connected with the first surface and the second surface, and the side wall is connected with the first surface, the second surface and the top wall. The top sealing edge is arranged on the top wall and extends towards the first surface direction. The side edge sealing is arranged on the side wall and extends towards the second surface direction. The tab includes a first end and a second end opposite to each other, the first end is connected to the battery core main body, and the second end is located outside the packaging film. The battery assembly also includes a wire soldered to the second end and/or a flexible circuit board. The battery assembly is advantageous in terms of volume reduction. The application also provides a battery, a battery pack and an electronic device.

Description

Battery, battery assembly, battery pack and electronic device

Technical Field

The present disclosure relates to the field of batteries, and more particularly, to a battery, a battery assembly, a battery pack, and an electronic device using the battery assembly or the battery.

Background

Currently, lithium ion batteries are widely used in portable electronic devices such as mobile phones, digital cameras, and portable computers by virtue of their high energy density, long cycle life, and no memory effect.

With the development of technology, how to reduce the volume of the existing battery assembly is facing challenges.

Disclosure of Invention

In view of the above, it is necessary to provide a battery assembly and a battery that are simple in structure and advantageous in terms of volume reduction.

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

The battery component as an aspect of the present application includes a cell main body, a packaging film, and a tab. The packaging film comprises a main body part, a top sealing edge and a side sealing edge. The main body part is used for coating the battery cell main body. The main body part comprises a first surface, a second surface, a top wall and a side wall, wherein the first surface and the second surface are arranged opposite to each other, the top wall is connected with the first surface and the second surface, and the side wall is connected with the first surface, the second surface and the top wall. The top sealing edge is arranged on the top wall and extends towards the first surface direction. The side edge sealing is arranged on the side wall and extends towards the second surface direction. The tab includes first end and second end that is opposite to each other, first end is connected the electric core main part, the second end is located outside the packaging film. The battery assembly further comprises a wire and/or a flexible circuit board, and the wire and/or the flexible circuit board is welded with the second end.

As one aspect of the application, the top seal is located between the first surface and the second surface.

As one aspect of the application, the side seal is located between the first surface and the second surface.

As an aspect of the present application, the tab is located between the first surface and the second surface.

As one aspect of the present application, an electronic device includes a battery assembly as described above.

The battery assembly is simple in structure, the top sealing edge and the side sealing edge extend towards opposite directions, so that the thickness of the connecting portion stack in the battery assembly is reduced, the volume of the battery assembly is reduced, the edge folding stress is reduced, and the edge folding damage probability of the connecting portion is reduced. And leads and/or flexible circuit boards are welded on the lugs in the battery assembly, so that the battery assembly is convenient to flexibly connect with external electronic elements, and the volume of the battery assembly is reduced. Further, the top seal, the side seal, and/or the tab are located between the first surface and the second surface, which can further reduce the volume of the battery assembly.

The battery as another scheme of the application comprises an electric core and a circuit board. The battery cell comprises a packaging bag and a tab. The packaging bag comprises a main body and a top sealing edge, wherein the main body comprises a top surface, the top sealing edge extends out of the top surface, and the top sealing edge bends towards the direction of the main body and covers part of the top surface. The tab extends from the top edge seal. The circuit board is arranged on the top surface. And the position of the circuit board corresponding to the lug is provided with a clearance groove, and the lug is bent towards the clearance groove and is electrically connected with the circuit board.

As an aspect of the present application, the circuit board includes a lower surface facing the top surface and an upper surface facing away from the top surface; the clearance groove penetrates through the upper surface and the lower surface, and the tab and the circuit board are electrically connected to the upper surface.

As an aspect of the present application, the projection of the tab on the top surface is entirely located in the top surface.

As an aspect of the application, the battery cell includes two tabs, and the position of the circuit board corresponding to each tab is provided with one empty avoiding groove.

As an aspect of the present application, the two empty-avoiding grooves are communicated with each other.

As an aspect of the application, a first sealing member and a second sealing member are disposed in the top sealing edge, the first sealing member is used for isolating the top sealing edge and one of the tabs, the second sealing member is used for isolating the top sealing edge and the other of the tabs, the first sealing member is located in one of the clearance grooves, the second sealing member is located in the other of the clearance grooves, and projections of the first sealing member, the second sealing member and the circuit board on the top surface are not overlapped.

The battery pack as an aspect of the present application includes a circuit board and a plurality of horizontally arranged battery cells. Each battery cell comprises a packaging bag and a tab. The packaging bag comprises a main body and a top sealing edge, wherein the main body comprises a top surface, the top sealing edge extends out of the top surface, and the top sealing edge bends towards the direction of the main body and covers part of the top surface. The tab extends from the top edge seal; the circuit board is arranged on the surface formed by the top surfaces of the plurality of horizontally arranged battery cells. And the position of the circuit board corresponding to the lug of each battery cell is provided with a clearance groove, and the lug is bent towards the clearance groove and is electrically connected with the circuit board.

As an aspect of the present application, the projections of the tabs on each of the battery cells on the top surface of the battery cell where the tab is located are all located in the top surface.

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

As an aspect of the present application, the battery pack includes a plurality of the batteries as described above, and a plurality of the batteries are vertically arranged or stacked.

The above-mentioned battery in this application utilizes the design of avoiding empty groove, for the utmost point ear provides the space of buckling, avoids buckling regional part the utmost point ear is relative the battery core protrusion, so as to improve the battery is at the ascending space utilization of thickness, saves the encapsulation space of battery, thereby provides more spaces for the battery core, and then reaches the purpose that promotes battery capacity.

The battery as another scheme of the application comprises an electric core and a tab electrically connected with the electric core. The battery cell comprises a packaging bag, the packaging bag comprises a main body part and a top sealing part, the main body part comprises a top surface, the top sealing part extends out of the top surface and is folded towards the top surface, and the tab extends out of the top sealing part. The battery also comprises an insulating piece, wherein the insulating piece comprises a built-in part positioned in the top sealing part and an extension part extending to the outside of the top sealing part, the tab is arranged on the insulating piece in a penetrating mode to be isolated from the top sealing part, and the extension part is connected with the built-in part and bends towards the top sealing part. The extension part comprises two corner parts which are respectively positioned at two sides of the pole lug, and the two corner parts are respectively provided with a notch structure.

As an aspect of the present application, the extension portion may form the notch structure by cutting the corner portion or by folding the corner portion.

As an aspect of the present application, the intersection line of the notch structure and the extension portion is an arc line, an oblique line or a multi-segment line.

As an aspect of the present application, the intersection of the notch structure with the side edge of the extension portion is at a point a, the intersection of the notch structure with the top edge of the extension portion is at a point B, and an included angle α formed by a connection line between the point a and the point B and the side edge of the extension portion satisfies: alpha is more than or equal to 110 degrees and less than or equal to 160 degrees.

As an aspect of the application, a distance D from a junction C of the tab and the extension to the point B is 0.1mm-1mm.

As an aspect of the present application, the top sealing portion includes two oppositely disposed first sealing portions and second sealing portions and a third sealing portion connected between the first sealing portions and the second sealing portions, the first sealing portions and the second sealing portions are respectively folded toward the third sealing portions, the third sealing portions are folded toward the top surface, and the built-in portion is located in the third sealing portions.

As an aspect of the application, the battery further includes a circuit board electrically connected to the tab, and the circuit board is disposed on a surface formed by a portion of the top surface and a portion of the top seal.

As an aspect of the application, the circuit board includes a flexible circuit board and a reinforcing plate disposed on the flexible circuit board and facing the top surface, the reinforcing plate is disposed on a part of the surface formed by the third sealing portion and a part of the top surface, the reinforcing plate includes a first surface facing the first sealing portion and a second surface facing the second sealing portion, the first surface is recessed inwards to form a first accommodating space, the second surface is recessed inwards to form a second accommodating space, a part of the first sealing portion is accommodated in the first accommodating space, and a part of the second sealing portion is accommodated in the second accommodating space.

The above-mentioned battery in this application utilizes the design of breach structure, has avoided after the extension is buckled relative battery convex problem has improved the battery has saved the encapsulation space of battery in the ascending space utilization of thickness to provide more spaces for the electric core, and then reach the purpose that promotes battery capacity.

A battery as still another aspect of the present application includes a cell. The battery cell comprises a packaging bag. The packaging bag comprises a main body part, a top sealing part and at least one side sealing part. The main body part comprises a top surface, a bottom surface opposite to the top surface and a side surface connected between the top surface and the bottom surface, and the top sealing part extends out from the top surface. The side seal part extends from the side surface and is connected to the top seal part, and the side seal part extends outwards in the length direction of the battery. The top sealing part and the side sealing part are provided with a first notch part at the intersection, and the side sealing part is folded towards the side along the connection edge of the side sealing part and the main body part. The top sealing part and the intersection part of the side sealing part and the top sealing part are folded towards the top surface, and the projection of the top sealing part on the plane of the top surface of the battery is all located in the range of the top surface.

As an aspect of the present application, the side seal portion includes a corner portion adjacent to the first notch portion, and the corner portion is folded toward the top seal portion.

As an aspect of the application, the side seal portion includes a corner portion adjacent to the first notch portion, and a second notch portion is provided on the corner portion.

As an aspect of the present application, the battery cell further includes an electrode assembly and a tab, where the electrode assembly is accommodated in the main body portion, and the tab is electrically connected to the electrode assembly and extends out from the top seal portion.

According to the battery, the first notch is formed in the intersection of the top sealing part and the side sealing part, so that the folded top sealing part and the side sealing part are prevented from protruding relative to the battery, and the packaging space of the battery is saved. Therefore, when the battery is applied to the electronic device, for example, the battery is accommodated in the battery compartment of the electronic device, the top sealing part and the side sealing part in the battery can not protrude relative to the battery after being folded, so that the battery is convenient to install, the space occupation rate of the battery in the battery compartment is reduced, and the space utilization rate of the battery compartment is improved.

The battery as another scheme of the application comprises an electric core and a circuit board electrically connected with the electric core. The battery cell comprises a packaging bag. The packaging bag comprises a main body part and a top sealing part, wherein the main body part comprises a top surface, and the top sealing part extends out of the top surface and is folded towards the top surface. The top sealing part comprises a first sealing part, a second sealing part and a third sealing part, wherein the first sealing part and the second sealing part are oppositely arranged, the third sealing part is connected between the first sealing part and the second sealing part, the first sealing part and the second sealing part are respectively folded towards the third sealing part, and the circuit board is arranged on the surface formed by part of the third sealing part and part of the top surface. The projection of the first sealing part and the second sealing part on the plane of the top surface is not overlapped with the projection of the circuit board or the reinforcing area in the circuit board on the plane of the top surface.

As an aspect of the present application, the first sealing portion includes a first corner portion opposite to the circuit board, the second sealing portion includes a second corner portion opposite to the circuit board, a first crease is provided on the first corner portion, a second crease is provided on the second corner portion, the first corner portion is folded along the crease, and the second corner portion is folded along the second crease.

As an aspect of the present application, the first sealing portion is provided with a first notch opposite to the circuit board, and the second sealing portion is provided with a second notch opposite to the circuit board.

As an aspect of the present application, the circuit board includes a first side, a second side opposite to the first side, a third side, and a fourth side opposite to the third side, where the first side and the second side are respectively connected between the third side and the fourth side. The first side face is provided with a third notch, the second side face is provided with a fourth notch, part of the first sealing part is correspondingly accommodated in the third notch, and part of the second sealing part is correspondingly accommodated in the fourth notch; or a third gap is formed at the joint of the third side surface and the first side surface, a fourth gap is formed at the joint of the third side surface and the second side surface, part of the first sealing part is correspondingly accommodated in the third gap, and part of the second sealing part is correspondingly accommodated in the fourth gap.

As an aspect of the present application, the circuit board includes a flexible circuit board and a reinforcing plate disposed on a side of the flexible circuit board facing the top surface, the region corresponding to the reinforcing plate is a reinforcing region of the circuit board, the reinforcing plate is disposed on a surface formed by a portion of the third sealing portion and a portion of the top surface, the flexible circuit board includes a first end facing the first sealing portion and a second end facing the second sealing portion, wherein in a width direction of the battery, the first end protrudes relative to the reinforcing plate to form a first accommodating space together with the reinforcing plate, the second end protrudes relative to the reinforcing plate to form a second accommodating space together with the reinforcing plate, and a portion of the first sealing portion is accommodated in the first accommodating space and a portion of the second sealing portion is accommodated in the second accommodating space.

According to the battery, through changing the structure of the first sealing part and the second sealing part, the structure of the circuit board or the structure of the reinforcing plate, the problem that the space of the battery in the length direction is wasted due to the overlapping arrangement of the first sealing part and the second sealing part and the circuit board is avoided, the space utilization rate of the battery in the length direction is improved, and the purpose of improving the battery capacity is achieved.

Drawings

Fig. 1 is a schematic perspective view of a part of the structure of a battery pack according to an embodiment of the present application.

Fig. 2 is a partially enlarged schematic view of a part of the structure of the battery assembly shown in fig. 1.

Fig. 3 is a perspective view illustrating a partial structure of a battery pack according to another embodiment of the present application.

Fig. 4 is a partially enlarged schematic view of a part of the structure of the battery assembly shown in fig. 3.

Fig. 5 is a perspective view illustrating a partial structure of a battery pack according to still another embodiment of the present application.

Fig. 6 is a perspective view of a battery pack according to an embodiment of the present application.

Fig. 7 is a perspective view of a battery pack according to another embodiment of the present application.

Fig. 8 is a perspective view of a battery pack according to still another embodiment of the present application.

Fig. 9 is a perspective view of a battery pack according to still another embodiment of the present application.

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

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

Fig. 12 is a side view of the battery shown in fig. 10.

Fig. 13 is a top view of the battery shown in fig. 10.

Fig. 14 is a schematic view of the circuit board, the first electrical connector and the second electrical connector shown in fig. 10.

Fig. 15 is a schematic structural view of a battery according to another embodiment of the present application.

Fig. 16 is a top view of the battery shown in fig. 15.

Fig. 17 is a schematic view of the circuit board, the first electrical connector and the second electrical connector shown in fig. 15.

Fig. 18 is a schematic structural view of a battery pack according to an embodiment of the present application.

Fig. 19 is a schematic structural view of a battery pack according to another embodiment of the present application.

Fig. 20 is a schematic structural view of a battery pack according to another embodiment of the present application.

Fig. 21 is a schematic structural view of a battery pack according to another embodiment of the present application.

Fig. 22 is a schematic structural view of a battery pack according to another embodiment of the present application.

Fig. 23 is a schematic block diagram of an electronic device according to an embodiment of the present application.

Fig. 24 is a schematic view of the structure of a battery according to an embodiment of the present application.

Fig. 25 is a schematic front view of the battery of fig. 24.

Fig. 26 is an enlarged view of II shown in fig. 24.

Fig. 27 is a plan view of the battery shown in fig. 24, with the tab not bent.

Fig. 28 is a schematic structural view of a battery according to another embodiment of the present application.

Fig. 29 is a schematic view of a battery according to another embodiment of the present application.

Fig. 30 is a schematic structural view of a battery according to another embodiment of the present application.

Fig. 31 is a schematic view of a battery according to another embodiment of the present application.

Fig. 32 is a schematic structural view of a battery according to another embodiment of the present application.

Fig. 33 is a schematic view of a battery according to another embodiment of the present application.

Fig. 34 is a top view of the battery shown in fig. 33.

Fig. 35 is a schematic structural view of the circuit board shown in fig. 33.

Fig. 36 is a top view of a battery according to an embodiment of the present application.

Fig. 37 is an expanded view of the battery shown in fig. 36.

Fig. 38 is a schematic view of the battery after folding the side seal shown in fig. 36.

Fig. 39 is a schematic view of the battery pair of fig. 38 at another viewing angle.

Fig. 40 is a schematic view of an electrode assembly according to an embodiment of the present application.

Fig. 41 is a top view of a battery according to another embodiment of the present application.

Fig. 42 is an expanded view of a battery according to another embodiment of the present application.

Fig. 43 is an expanded view of a battery according to another embodiment of the present application.

Fig. 44 is an expanded view of a battery according to another embodiment of the present application.

Fig. 45 is an expanded view of a battery according to another embodiment of the present application.

Fig. 46 is a schematic structural view of a battery according to an embodiment of the present application.

Fig. 47 is a schematic structural diagram of a battery cell according to an embodiment of the present application.

Fig. 48 is an expanded schematic view of the cell of fig. 47.

Fig. 49 is a top view of the battery shown in fig. 46.

Fig. 50 is a schematic structural diagram of the circuit board shown in fig. 46.

Fig. 51 is a top view of a battery according to an embodiment of the present application.

Fig. 52 is an expanded schematic view of the cell of fig. 51.

Fig. 53 is a top view of the cell of fig. 51.

Fig. 54 is an expanded view of a cell according to an embodiment of the present application.

Fig. 55 is a top view of a battery according to another embodiment of the present application.

Fig. 56 is a top view of a battery according to another embodiment of the present application.

Fig. 57 is a top view of a battery according to another embodiment of the present application.

Fig. 58 is a top view of a battery according to another embodiment of the present application.

Fig. 59 is a schematic block diagram of an electronic device according to an embodiment of the present application.

Description of the main reference signs

Corner 1141 of external connector 125 of battery assembly 100

Second notch 1142 of packaging film 30 for avoiding empty groove 13

First gap 115 of first space-avoiding groove 13a of tab 50

Connecting edge 116 of second clearance groove 13b of main body 31

Top seal 33 battery 20 electrode assembly 117

Side banding 35 battery 300 positive plate 1171

Second end 53 circuit board 310 spacer 1172

First surface 311 void space 32 negative electrode sheet 1173

Second surface 313 electrical connection 33a tab 118

Top wall 315 external connector 34 circuit board 12

Electronic device 100b

Battery 10a

Sidewall 317 body 112a electrical connector 13c

Top surface 1121 of connecting portion 37 and electronic device 100c

The first fold-over region 371 seals the cells 10d, 20a 113a

The second turnover region 373 has a first seal 1131 and a first notch 1134

Second notch 1135 of second sealing portion 1132 of first connecting end 372

The second connecting end 374 includes a third sealing portion 1133 and a first corner portion 1136

Second corner 1137 of tab 12a of lead 60

First crease 1138 of insulator 130 of flexible circuit board 70

Second folds 1139 of the inner portion 131 of the electrical connector 61, 73

First tab 115a of extension 132 of golden finger 71

Corner 1321 of electronic device 100a second tab 116a

Battery 10 notch structure 1322 electrical connector 121a

Side 1323 first side 122a of cell 11

Third notch 1221 of top edge 1324 of packaging bag 111

Body 1111 intersection line 133 second side 123a

Fourth notch 1231 of second electrical connector 124 with top seal 1112

Top 1113 third side 124a of flexible circuit board 141

Bottom face 1114 reinforcing plate 142 fourth side 125a

Side 1115 first surface 1421 flexible circuit board 126

First end 1261 of second surface 1422 of tab 112

Second end 1262 of first receiving space 1423 of first tab 112c

The second lug 112d has a second receiving space 1424 and a first receiving space 1263

First sealing member 113 and second accommodating space 1264 of electrical connector 143

Second seal 114 cell 10c stiffener 127

Bottom 1122 external connector 128 for circuit boards 12, 14

Lower surface 121 side 1123 electronic device 100d

Upper surface 122 side seal 114a first electrical connector 123

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

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application.

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/examples only and is not intended to be limiting of the present application.

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

Referring to fig. 1 to 9, a battery assembly 100 is disclosed, and includes a battery cell main body (not shown), a packaging film 30, and a tab 50. The packaging film 30 includes a main body 31, a top seal 33, and side seals 35. The top seal 33 and the side seal 35 are connected to the main body 31. The main body 31 covers the cell main body. The tab 50 includes opposite first and second ends 53. The first end is connected to the battery cell body, and the second end 53 is located outside the packaging film 30.

Referring to fig. 1, the main body 31 includes a first surface 311, a second surface 313, a top wall 315 and a side wall 317. The first surface 311 is opposite to the second surface 313, the top wall 315 connects the first surface 311 with the second surface 313, and the side wall 317 connects the first surface 311, the second surface 313 and the top wall 315.

The top seal 33 is disposed on the top wall 315, and the top seal 33 extends from the top wall 315 toward the first surface 311.

The side seal 35 is disposed on the side wall 317, and the side seal 35 extends from the side wall 317 toward the second surface 313.

Referring to fig. 1, 2, 3, 4 and 5, the packaging film 30 further includes a connecting portion 37 connecting the top edge seal 33 and the side edge seal 35. The connecting portion 37 includes a first folding region 371 and a second folding region 373 connected to the first folding region 371. The first folding area 371 includes a first connection end 372, the first connection end 372 is connected with the top sealing edge 33, the second folding area 373 includes a second connection end 374, and the second connection end 374 is connected with the side sealing edge 35.

In some embodiments, referring to fig. 1 and 2, the second folding region 373 is folded from the second connecting end 374 to a side of the side edge 35 facing away from the side wall 317. Wherein, the included angle between the second folding area 373 and the side edge seal 35 is smaller than 90 °. The first fold-over region 371 is folded from the first connecting end 372 toward the side wall 317.

In other embodiments, referring to fig. 3 and 4, the first folding area 371 is folded from the first connecting end 372 at a side of the top edge seal 33 facing away from the top wall 315. Wherein the included angle between the first folding area 371 and the top sealing edge 33 is smaller than 90 °. The second fold-over region 373 is folded from the second connecting end 374 toward the top wall 315.

In other embodiments, referring to fig. 5, the battery assembly 100 includes both the arrangements of fig. 2 and 4. That is, as shown in fig. 2, the connecting portion 37 between one of the side seal 35 and the top seal 33 is disposed in a manner that the second folding region 373 is folded from the second connecting end 374 to a side of the side seal 35 facing away from the side wall 317. Wherein the included angle between the second folding region 373 and the side edge 35 is smaller than 90 °, and the first folding region 371 is folded from the first connecting end 372 toward the side wall 317; the other side seal 35 is disposed at the connecting portion 37 of the top seal 33, as shown in fig. 3, and the first folding area 371 is bent from the first connecting end 372 at a side of the top seal 33 facing away from the top wall 315. Wherein, the included angle between the first folding area 371 and the top edge 33 is smaller than 90 °, and the second folding area 373 is folded from the second connecting end 374 toward the top wall 315.

Preferably, the top seal 33 is located between the first surface 311 and the second surface 313, i.e., the top seal 33 does not protrude from the first surface 311 in order to reduce the volume of the battery assembly 100. In other embodiments, the top edge 33 may protrude from the first surface 311.

Preferably, the side seal 35 is located between the first surface 311 and the second surface 313, i.e., the side seal 35 does not protrude from the second surface 313 in order to reduce the volume of the battery assembly 100. In other embodiments, the side seal 35 may also protrude from the second surface 313.

The tab 50 may extend from the top edge seal 33 or from the side edge seal 35. In this application, the tab 50 is further described by taking as an example that it protrudes from the top edge seal 33.

Referring to fig. 3, the portion of the tab 50 located outside the packaging film 30 is perpendicular to the top wall 315. Referring to fig. 1, the portion of the tab 50 located outside the packaging film 30 may also be disposed parallel to the top wall 315. In other embodiments, the portion of the tab 50 located outside the packaging film 30 may be disposed at other angles with respect to the top wall 315.

Preferably, the tab 50 is located between the first surface 311 and the second surface 313, i.e., the tab 50 does not protrude from the first surface 311 or the second surface 313, so as to reduce the volume of the battery assembly 100.

Referring to fig. 6, 7, 8 and 9, the battery assembly 100 further includes a wire 60 or/and a flexible circuit board 70, and the wire 60 or/and the flexible circuit board 70 is soldered to the second end 53 to achieve an electrical connection. The welding may be laser welding, ultrasonic welding or hot press welding.

Referring to fig. 6 and 7, in the present embodiment, the end portion of the wire 60 connected to the second end 53 is flat, so as to facilitate soldering. In some embodiments, the end of the wire 60 facing away from the second end 53 is provided with solder (e.g., solder paste, not shown) for thermocompression bonding electrical connection with other electronic components. In other embodiments, referring to fig. 7, an electrical connector 61 is provided at an end of the wire 60 facing away from the second end 53 for electrical connection with other electronic components.

Referring to fig. 8, a gold finger 71 is disposed at an end of the flexible circuit board 70 facing away from the second end 53 for electrically connecting with other electronic components. In other embodiments, referring to fig. 9, an end of the flexible circuit board 70 facing away from the second end 53 is provided with an electrical connector 73 for making electrical connection with other electronic components.

In some embodiments, a conductive sheet (not shown) may be further disposed between the second end 53 of the tab 50 and the wire 60 and/or between the second end 53 of the tab 50 and the flexible circuit board 70, and electrically connects the tab 50 and the wire 60 and/or electrically connects the tab 50 and the flexible circuit board 70. And laser welding or ultrasonic welding is adopted between the tab and the conducting strip.

In some embodiments, a protection board (not shown) may be further disposed between the second end 53 of the tab 50 and the lead 60 and/or between the second end 53 of the tab 50 and the flexible circuit board 70. The protective plate electrically connects the tab 50 with the lead 60 and/or electrically connects the tab 50 with the flexible circuit board 70. The protection board is provided with components such as MOS, control chip (control IC) and the like.

The above-described battery assembly 100 is applied to an electronic device (not shown). The electronic device may be, but is not limited to, a mobile phone, a computer, an electronic toy, etc. The electronic device further comprises external electronic components (not shown) electrically connected to the wires 60 and/or the flexible circuit board 70. Specifically, in some embodiments, the external electronic component is thermally soldered to the solder on the leads 60 or connected to the electrical connector 61 on the leads 60. In other embodiments, the external electronic component is connected to the gold finger 71 of the flexible circuit board 70 or to the electrical connector 73 of the flexible circuit board 70.

The above-mentioned battery assembly 100 of this application simple structure, the top edge seal 33 with the side edge seal 35 extends towards opposite direction for the thickness that connecting portion 37 stacked in the battery assembly 100 reduces, thereby has reduced battery assembly 100's volume, has also reduced hem stress simultaneously, has reduced the probability that connecting portion 37 hem was damaged. The lead wires 60 and/or the flexible circuit board 70 are soldered to the tabs 50 of the battery assembly 100, so as to flexibly connect with external electronic components, thereby facilitating the volume reduction of the battery assembly 100. Further, the top seal 33, the side seal 35, and/or the tab 50 are located between the first surface 311 and the second surface 313, which can further reduce the volume of the battery assembly 100.

Referring to fig. 10, a battery 10 is also disclosed. The battery 10 includes a battery cell 11 and a circuit board 12. Referring to fig. 21, the battery cell 11 includes a package bag 111 and a tab 112. The package 111 includes a main body 1111 and a top flange 1112. The body portion 1111 includes a top surface 1113. The top sealing edge 1112 extends from the top surface 1113. The top sealing edge 1112 is bent toward the main body 1111 and covers a portion of the top surface 1113. The tab 112 extends from within the top seal 1112. The circuit board 12 is disposed on the top surface 1113. The circuit board 12 is provided with a clearance groove 13 at a position corresponding to the tab 112. The tab 112 is bent toward the space-avoiding groove 13 and electrically connected to the circuit board 12.

Referring to fig. 10, 21 and 12, the design of the void-avoiding groove 13 in the present application provides a bending space for the tab 112, so as to avoid the protrusion of the tab 112 relative to the battery cell 11 in the bending region a, so as to improve the space utilization of the battery 10 in the thickness direction (i.e., the X-axis direction), save the packaging space of the battery 10, and further provide more space for the battery cell 11, thereby achieving the purpose of improving the battery capacity.

Referring to fig. 10, the circuit board 12 includes a lower surface 121 facing the top surface 1113 and an upper surface 122 facing away from the top surface 1113. The void-avoidance groove 13 penetrates the upper surface 122 and the lower surface 121. The tab 112 and the circuit board 12 are electrically connected to the upper surface 122.

Referring to fig. 12 and 13, the projection of the tab 112 onto the top surface 1113 is entirely within the top surface 1113. That is, part of the tab 112 in the bending region a does not protrude from the battery cell 11, so that the space utilization of the battery 10 in the thickness direction (i.e., the X-axis direction) is improved, and the packaging space of the battery 10 is saved, so that more space is provided for the battery cell 11, and the purpose of improving the battery capacity is achieved.

Referring to fig. 10, in this embodiment, the battery cell 11 includes two tabs 112. The circuit board 12 is provided with a space avoiding groove 13 corresponding to each tab 112. The two empty avoiding grooves 13 are not communicated with each other. For convenience of explanation, the two tabs 112 are defined as a first tab 112c and a second tab 112d, and the two empty-avoiding grooves 13 are defined as a first empty-avoiding groove 13a and a second empty-avoiding groove 13b.

Referring to fig. 15, in some embodiments, the first and second void-avoidance grooves 13a and 13b communicate with each other.

Further, referring to fig. 10, a first sealing member 113 and a second sealing member 114 are disposed in the top sealing edge 1112. The first sealing member 113 is used for isolating the top sealing edge 1112 and the first tab 112c, and the second sealing member 114 is used for isolating the top sealing edge 1112 and the second tab 112d. The first sealing member 113 is located in the first space-avoiding groove 13a, and the second sealing member 114 is located in the second space-avoiding groove 13b. Wherein the projections of the first seal 113, the second seal 114 and the circuit board 12 on the top surface 1113 do not overlap.

The design of the empty slot in this application provides accommodation space for first sealing member 113 with second sealing member 114 avoids first sealing member 113 with circuit board 12, and second sealing member 114 with circuit board 12 is in the overlapping setting of battery 10 in length direction (Y axle direction promptly), in order to effectively improve battery 10 space utilization in length direction. In addition, in the case of a certain overall size of the battery 10, the layout of the circuit board 12, the first sealing member 113 and the second sealing member 114 is optimized by using the design of the empty-avoiding groove, so as to save the packaging space of the battery 10, thereby providing more space for the battery core 11 and further achieving the purpose of improving the battery capacity.

Referring to fig. 10, the upper surface 122 is provided with a first electrical connector 123 and a second electrical connector 124. The first electrical connector 123 is electrically connected to the first tab 112c, and the second electrical connector 124 is electrically connected to the second tab 112d.

Further, referring to fig. 10, the circuit board 12 is provided with an external connector 125. The external connector 125 is electrically connected to the circuit board 12. In some embodiments, the external connector 34 is not limited to a flexible circuit board or terminal wires.

Referring to fig. 18, 19, 21, 20 and 21, a battery pack 20 is also provided. The battery pack 20 includes a plurality of the above-described batteries 10. A plurality of the cells 10 are vertically arranged or stacked.

The battery 10 and the battery pack 20 of the present application will be specifically described below with reference to examples.

Example 1.1

Referring to fig. 10, a battery 10 includes a cell 11 and a circuit board 12.

Referring to fig. 21, the battery 11 includes a package 111, a first tab 112c, and a second tab 112d. The package 111 includes a main body 1111 and a top flange 1112.

Referring to fig. 21, the body 1111 includes a top surface 1113, a bottom surface 1114 facing away from the top surface 1113, and a side surface 1115 connected between the top surface 1113 and the bottom surface 1114. In example 1.1, the main body 1111 has a rectangular parallelepiped structure. In some embodiments, the main body 1111 is not limited to a rectangular parallelepiped structure, and may have a columnar structure or the like.

Referring to fig. 10 and 21, the top sealing edge 1112 extends from the top surface 1113, is bent toward the main body 1111, and covers a portion of the top surface 1113.

Referring to fig. 10 and 21, the first tab 112c and the second tab 112d extend from the top edge seal 1112, respectively. Wherein the polarity of the first tab 112c is different from the polarity of the second tab 112 d.

Further, the battery 11 further includes an electrode assembly (not shown) and an electrolyte (not shown). The electrode assembly and the electrolyte are contained in the body 1111. Wherein the first tab 112c and the second tab 112d are electrically connected to the electrode assembly, respectively.

The electrode assembly may be of a structure common in the art.

Illustratively, the electrode assembly includes a positive electrode sheet, a separator, and a negative electrode sheet. The positive electrode sheet, the separator, and the negative electrode sheet are wound or laminated to form the electrode assembly. The first tab 112c is electrically connected to the positive electrode plate, and the second tab 112d is electrically connected to the negative electrode plate.

Referring to fig. 10 and 13, the circuit board 12 is disposed on the top surface 1113. The circuit board 12 includes a lower surface 121 facing the top surface 1113 and an upper surface 122 facing away from the top surface 1113. The upper surface 122 is provided with a first electrical connector 123 and a second electrical connector 124.

Referring to fig. 10, a first clearance groove 13a is formed in the circuit board 12 corresponding to the first tab 112c, and a second clearance groove 13b is formed in the circuit board 12 corresponding to the second tab 112d. The first tab 112c is bent toward the first space-avoiding groove 13a, and is electrically connected to the first electrical connector 123. The second lug 112d is bent toward the second space-avoiding groove 13b and electrically connected to the second electrical connector 124. In embodiment 1.1, the first and second void-avoiding grooves 13a and 13b do not communicate with each other.

With reference to fig. 10 and 14, the first void-avoiding groove 13a penetrates the upper surface 122 and the lower surface 121, and the second void-avoiding groove 13b penetrates the upper surface 122 and the lower surface 121.

In embodiment 1.1, referring to fig. 13, the projections of the first tab 112c and the second tab 112d on the top surface 1113 are all located within the top surface 1113.

Example 1.2

Referring to fig. 15, 16 and 17, embodiment 1.2 is different from embodiment 1.1 in that the first and second empty avoiding grooves 13a and 13b in embodiment 1.2 communicate with each other.

Example 1.3

Referring to fig. 18, a battery pack 20 includes two batteries 10 as described in example 1.1. Two of the cells 10 are stacked.

Example 1.4

Referring to fig. 19, embodiment 1.4 is different from embodiment 1.3 in that two of the batteries 10 in embodiment 1.4 are vertically arranged.

Example 1.5

Referring to fig. 21 and 20, a battery pack 20 includes two batteries 10 as described in example 1.2. Two of the cells 10 are stacked.

Example 1.6

Referring to fig. 21, embodiment 1.6 is different from embodiment 1.5 in that two of the batteries 10 in embodiment 1.6 are vertically arranged.

Referring to fig. 22, the present application also provides a battery pack 300. The battery pack 300 includes a circuit board 310 and a plurality of horizontally arranged battery cells 11. Referring to fig. 21, the circuit board 310 is disposed on a surface formed by the top surfaces 1113 of the plurality of horizontally arranged cells 11. The circuit board 310 is provided with a clearance groove 32 corresponding to the tab 112 of each cell 11. The tab 112 is bent toward the space-avoiding groove 13 and electrically connected to the circuit board 310.

Referring to fig. 22, the projection of the tab 112 on each of the battery cells 11 on the top surface 1113 of the battery cell 11 is located in the top surface 1113.

Further, the first sealing member 113 and the second sealing member 114 in each top sealing edge 1112 are respectively located in the corresponding empty avoiding groove 32.

Referring to fig. 22, the clearance groove 32 extends through the circuit board 310. The surface of the circuit board 310 facing away from the battery cell 11 is provided with an electrical connector 33a. The electrical connector 33a is electrically connected to the tab 112.

Further, referring to fig. 22, an external connector 34 is further disposed on the circuit board 310. The external connector 34 is electrically connected to the circuit board 310. In some embodiments, the external connector 34 is not limited to a flexible circuit board or terminal wires.

In some embodiments, referring to fig. 22, the battery pack 300 includes the circuit board 310 and two of the cells 11. The two battery cells 11 are horizontally arranged.

Referring to fig. 23, the present application also provides an electronic device 100a. The electronic device 100a includes the battery 10 described above.

The electronic device 100a may be a mobile electronic device, an energy storage device, an electric vehicle, a hybrid electric vehicle, or the like. The mobile electronic device may be a mobile phone, a wearable electronic device, a tablet computer, a notebook computer, etc.

Referring to fig. 24, the present application also discloses a battery 10a. The battery 10a includes a battery cell 11 and a tab 12a electrically connected to the battery cell 11. The battery cell 11 includes a package 111. The package 111 includes a main body 112a and a top seal 113a. The body portion 112a includes a top surface 1121. The top seal 113a extends from the top surface 1121 and is folded toward the top surface 1121. The tab 12a extends from the top seal 113a. The battery 10a further includes an insulator 130. The insulator 130 includes a built-in portion 131 located within the top seal portion 113a, and an extension portion 132 extending out of the top seal portion 113a. The tab 12a is disposed through the insulating member 130 so as to be isolated from the top sealing portion 113a. The extension 132 is connected to the built-in portion 131 and is bent toward the top sealing portion 113a. The extension 132 includes two corner portions 1321 located on two sides of the tab 12a. Notch structures 1322 are provided on both of the corner portions 1321.

The design of utilizing breach structure 1322 in this application has avoided epitaxial portion 132 to buckle the back relatively battery 10a convex problem has improved battery 10 a's space utilization in thickness direction (i.e. X axle direction), has saved battery 10 a's encapsulation space to provide more spaces for electric core 11, and then reach the purpose that promotes the battery capacity.

Wherein, the insulating member 130 is a tab adhesive.

In some embodiments, referring to fig. 25, 29, 30, 31, and 32, the extension 132 forms the notch structure 1322 by cutting the corner 1321 or by folding the corner 1321.

With reference to fig. 25, 29, 30, 31 and 32, the intersection line 133 of the notch 1322 and the extension 132 is an arc, a diagonal line or a multi-segment line.

Referring to fig. 26, 29, 30, 31 and 32, the notch structure 1322 intersects a side 1323 of the extension 132 at a point a, and the notch structure 1322 intersects a top edge 1324 of the extension 132 at a point B. The angle α formed by the line between the point a and the point B and the side 1323 of the extension 132 satisfies: alpha is more than or equal to 110 degrees and less than or equal to 160 degrees.

Referring to fig. 26, 29, 30, 31 and 32, a distance D from a junction C of the tab 12a and the extension 132 to the point B is 0.1mm to 1mm.

In some embodiments, referring to fig. 27, the top sealing portion 113a includes two oppositely disposed first sealing portions 1131 and second sealing portions 1132, and a third sealing portion 1133 connected between the first sealing portions 1131 and the second sealing portions 1132. The first sealing portion 1131 and the second sealing portion 1132 are folded toward the third sealing portion 1133, respectively. The third seal 1133 is folded toward the top surface 1121. The built-in portion 131 is located in the third sealing portion 1133.

Referring to fig. 27 and 28, the battery 10a further includes a circuit board 14 electrically connected to the tab 12 a. The circuit board 14 is disposed on a surface formed by a portion of the top surface 1121 and a portion of the top sealing portion 113 a.

In some embodiments, referring to fig. 33, 34 and 35, the circuit board 14 includes a flexible circuit board 141 and a stiffener 142 disposed on the flexible circuit board 141 toward the top surface 1121. The reinforcing plate 142 is disposed on a surface formed by a part of the third sealing portion 1133 and a part of the top surface 1121. The stiffener 142 includes a first surface 1421 facing the first seal 1131 and a second surface 1422 facing the second seal 1132. The first surface 1421 is recessed inward to form a first accommodating space 1423. The second surface 1422 is recessed inward to form a second accommodating space 1424. A part of the first sealing portion 1131 is accommodated in the first accommodating space 1423, and a part of the second sealing portion 1132 is accommodated in the second accommodating space 1424.

In this application, by performing the step recess processing on the two ends of the reinforcing plate 142, a first accommodating space 1423 accommodating the first sealing portion 1131 and a second accommodating space 1424 accommodating the second sealing portion 1132 are created for the first sealing portion 1131 and the second sealing portion 1132, so that the space utilization of the battery 10a in the length direction (i.e., the Y-axis direction) is greatly improved, and the battery capacity is improved.

The battery 10a of the present application will be specifically described by way of examples.

Example 2.1

Referring to fig. 24, a battery 10a includes a cell 11, a tab 12a electrically connected to the cell 11, and an insulator 130.

Referring to fig. 24, the battery cell 11 includes a package 111. The package 111 includes a main body 112a and a top seal 113a.

Referring to fig. 24, the body portion 112a includes a top surface 1121. In example 2.1, the main body 112a has a rectangular parallelepiped structure. In other embodiments, the main body 112a may have a regular structure such as a column or other irregular structure.

Referring to fig. 24, the top sealing portion 113a extends from the top surface 1121 and is folded toward the top surface 1121. Wherein, the tab 12a extends from the top sealing portion 113a.

Referring to fig. 24, the insulator 130 includes a built-in portion 131 located inside the top sealing portion 113a, and an extension portion 132 extending outside the top sealing portion 113a. The tab 12a is disposed through the insulating member 130 so as to be isolated from the top sealing portion 113a. The extension 132 is connected to the built-in portion 131 and is bent toward the top sealing portion 113a. The extension 132 includes two corner portions 1321 located on two sides of the tab 12 a. Notch structures 1322 are provided on both of the corner portions 1321.

In example 2.1, referring to fig. 24 and 25, the extension 132 is formed by cutting the corner 1321. The notch structure 1322 is diagonal to the intersection line 133 of the extension 132.

In other embodiments, referring to fig. 29, 30 and 31, the intersection line 133 of the notch structure 1322 and the extension 132 is an arc or a multi-segment line.

Referring to fig. 26, the notch structure 1322 intersects a side 1323 of the extension 132 at a point a, and the notch structure 1322 intersects a top edge 1324 of the extension 132 at a point B. The angle α formed by the line between the point a and the point B and the side 1323 of the extension 132 satisfies: alpha is more than or equal to 110 degrees and less than or equal to 160 degrees.

Referring to fig. 26, a distance D from a junction C of the tab 12a and the extension 132 to the point B is 0.1mm to 1mm.

In embodiment 2.1, referring to fig. 27 and 28, the battery 10a further includes a circuit board 14. The circuit board 14 is disposed on a surface formed by a portion of the top surface 1121 and a portion of the top sealing portion 113 a.

Wherein, the surface of the circuit board 14 facing away from the battery cell 11 is provided with an electrical connector 143. The electrical connector 143 is electrically connected to the tab 12a.

Example 2.2

Referring to fig. 32, embodiment 2.2 differs from embodiment 2.1 in that the notch structure 1322 in embodiment 2.2 is formed by folding the corner 1321.

Example 2.3

Embodiment 2.3 differs from embodiment 2.1 in the circuit board 14.

Referring to fig. 33, 34 and 35, the circuit board 14 includes a flexible circuit board 141 and a reinforcing plate 142 provided to the flexible circuit board 141 toward the top surface 1121. The reinforcing plate 142 is disposed on a surface formed by a part of the third sealing portion 1133 and a part of the top surface 1121. The stiffener 142 includes a first surface 1421 facing the first seal 1131 and a second surface 1422 facing the second seal 1132. The first surface 1421 is recessed inward to form a first accommodating space 1423. The second surface 1422 is recessed inward to form a second accommodating space 1424. A part of the first sealing portion 1131 is accommodated in the first accommodating space 1423, and a part of the second sealing portion 1132 is accommodated in the second accommodating space 1424.

Referring to fig. 23, the embodiment of the present application further provides an electronic device 100b. The electronic device 100b includes the battery 10a described above.

The electronic device 100b may be a mobile electronic device, an energy storage device, an electric automobile, a hybrid electric automobile, or the like. The mobile electronic device may be a mobile phone, a wearable electronic device, a tablet computer, a notebook computer, etc.

Referring to fig. 36, the present application also discloses a battery 10c. Referring to fig. 37, 38 and 39, the battery 10c includes a cell 11. The battery cell 11 includes a package 111. The package 111 includes a main body 112a, a top seal 113a, and at least one side seal 114a. The body 112a includes a top surface 1121, a bottom surface 1122 facing away from the top surface 1121, and a side surface 1123 connected between the top surface 1121 and the bottom surface 1122. The top seal 113a extends from the top surface 1121. The side seal 114a extends from the side face 1123 and extends outward in the longitudinal direction (i.e., the X-axis direction) of the battery 10c to connect the top seal 113a. The intersection of the top sealing portion 113a and the side sealing portion 114a is provided with a first notch 115. The side seal 114a is folded toward the side 1123 along a connecting edge 116 where the side seal 114a intersects the main body 112 a. The top seal 113a and the intersection of the side seal 114a and the top seal 113a are folded toward the top face 1121, and the projections of the top seal 113a on the plane of the top face 1121 of the battery 10c are all located within the range of the top face 1121.

Here, referring to fig. 37, 42 and 43, the first notch 115 is not limited to be in a regular shape such as arc, triangle, trapezoid and rectangle, or other irregular shapes.

In the battery 10c in the application, the first notch 115 is formed at the intersection of the top sealing portion 113a and the side sealing portion 114a, so that the folded top sealing portion 113a and the side sealing portion 114a are prevented from protruding relative to the battery 10c, and the packaging space of the battery 10c is saved. In this way, when the battery 10c is applied to the electronic device 100c (refer to fig. 23), for example, when the battery 10c is accommodated in a battery compartment (not shown) in the electronic device 100c, since the top sealing portion 113a and the side sealing portion 114a in the battery 10c do not protrude relative to the battery 10c after being folded, the battery 10c is convenient to be mounted, and meanwhile, the space occupation rate of the battery 10c in the battery compartment is reduced, and the space utilization rate of the battery compartment is improved.

Wherein, referring to fig. 36 and 37, the Y-axis direction is perpendicular to the X-axis direction.

In some embodiments, referring to fig. 44 and 45, the side seal 114a includes a corner 1141 adjacent to the first notch 115. Wherein the corner 1141 is folded toward the top seal 113 a; alternatively, the corner 1141 is provided with a second notch 1142.

Referring to fig. 44, the second notch 1142 is not limited to regular shapes such as triangle, arc, trapezoid, and rectangle, or other irregular shapes.

Referring to fig. 37 and 38, in some embodiments, the package 111 includes two side seals 114a. The two side seals 114a are disposed opposite to each other. In other embodiments, the package 111 includes one of the side seals 114a.

Referring to fig. 37 and 40, the battery cell 11 further includes an electrode assembly 117 and a tab 118. The electrode assembly 117 is housed in the main body 112 a. The tab 118 is electrically connected to the electrode assembly 117 and extends from the inside of the top sealing part 113 a.

Referring to fig. 36 and 41, the battery 10c further includes a circuit board 12. The circuit board 12 is disposed on the top surface 1121 and electrically connected to the tab 118.

With reference to fig. 36 and 41, an electrical connector 13c is disposed on a surface of the circuit board 12 opposite to the top surface 1121. The electrical connector 13c is electrically connected to the tab 118.

The battery 10c of the present application will be specifically described by way of examples.

Example 3.1

Referring to fig. 36 and 37, a battery 10c includes a cell 11. The battery cell 11 includes a package 111. The package 111 includes a main body 112a, a top sealing portion 113a, and two opposite side sealing portions 114a.

Referring to fig. 37, the main body 112a includes a top surface 1121, a bottom surface 1122 opposite to the top surface 1121, and a side surface 1123 connected between the top surface 1121 and the bottom surface 1122. In embodiment 3.1, the main body 112a has a substantially rectangular parallelepiped structure. In other embodiments, the main body 112a may have a regular structure such as a pillar shape or other irregular structure.

Referring to fig. 37, the top sealing portion 113a extends from the top surface 1121. Each side seal 114a extends from the side face 1123 and extends outwardly in the length direction of the battery 10c to connect the top seal 113a.

In embodiment 3.1, referring to fig. 36, 37, 38 and 39, a first notch 115 is provided at the intersection of the top seal 113a and the side seal 114 a. The side seal 114a is folded toward the side 1123 along a connecting edge 116 where the side seal 114a intersects the main body 112 a. The top seal 113a and the intersection of the side seal 114a and the top seal 113a are folded toward the top face 1121, and the projections of the top seal 113a in the longitudinal direction of the battery 10c are all located within the range of the top face 1121.

Referring to fig. 37, the first notch 115 is arc-shaped.

Referring to fig. 37 and 40, the battery cell 11 further includes an electrode assembly 117 and a bipolar ear 118. The electrode assembly 117 is housed in the main body 112 a. The two tabs 118 are electrically connected to the electrode assembly 117 and extend from the inside of the top sealing portion 113a.

Wherein the cell 11 further comprises an electrolyte (not shown). The electrolyte is contained in the body 112 a.

The electrode assembly 117 may be of a structure commonly known in the art.

For example, referring to fig. 37 and 40, the electrode assembly 117 includes a positive electrode tab 1171, a separator 1172, and a negative electrode tab 1173. The positive electrode sheet 1171, the separator 1172, and the negative electrode sheet 1173 are wound or laminated to form the electrode assembly 117. One tab 118 is electrically connected to the positive plate 1171, and the other tab 118 is electrically connected to the negative plate 1173.

The battery 10c also includes a circuit board 12. The surface of the circuit board 12 facing away from the top surface 1121 is provided with two electrical connectors 13c. The circuit board 12 is disposed on the top surface 1121, and the two electrical connectors 13c are electrically connected to the corresponding tabs 118.

Example 3.2

Example 3.2 differs from example 3.1 in the shape of the first cutout 115.

In embodiment 3.2, referring to fig. 42, the first notch 115 has a triangular shape.

Example 3.3

Example 3.3 differs from example 3.1 in the shape of the first cutout 115.

In embodiment 3.3, referring to fig. 43, the first notch 115 is rectangular.

Example 3.4

Embodiment 3.4 differs from embodiment 3.1 in that the first side seal 114a.

In embodiment 3.4, referring to fig. 44, the side seal 114a includes a corner 1141 adjacent to the first notch 115. The corner portion 1141 is provided with a second notch 1142.

In embodiment 3.4, the second segment 1142 is triangular.

In other embodiments, the second segment 1142 is not limited to regular shapes such as arc, trapezoid, and rectangle, or other irregular shapes.

In embodiment 3.4, the second notch 1142 is formed on the corner portion 1141, so that the problem of space waste in the length direction of the battery 10c caused by overlapping the corner portion 1141 of the side seal 114a with the circuit board 12 is avoided, thereby improving the space utilization of the battery 10c in the length direction and increasing the battery capacity.

Example 3.5

Embodiment 3.5 differs from embodiment 3.1 in that the first side seal 114a.

In embodiment 3.5, referring to fig. 45, the side seal 114a includes a corner 1141 adjacent to the first notch 115. Wherein the corner 1141 is folded toward the top seal 113 a.

In embodiment 3.5, the corner 1141 of the side seal 114a is folded, so that the problem of space waste in the longitudinal direction of the battery 10c caused by overlapping the corner 1141 with the circuit board 12 is avoided, thereby improving the space utilization of the battery 10c in the longitudinal direction and improving the battery capacity.

Referring to fig. 23, the embodiment of the present application further provides an electronic device 100c. The electronic device 100c includes the battery 10c described above.

The electronic device 100c may be a mobile electronic device, an energy storage device, an electric vehicle, a hybrid electric vehicle, or the like. The mobile electronic device may be a mobile phone, a wearable electronic device, a tablet computer, a notebook computer, etc.

Referring to fig. 46, a battery 10d is also disclosed. The battery 10d includes a battery cell 11 and a circuit board 12 electrically connected to the battery cell 11. Referring to fig. 47 and 48, the battery 11 includes a package 111. The package 111 includes a main body 112a and a top seal 113a. The body portion 112a includes a top surface 1121. The top seal 113a extends from the top surface 1121 and is folded toward the top surface 1121. The top sealing portion 113a includes two first sealing portions 1131 and second sealing portions 1132 disposed opposite to each other, and a third sealing portion 1133 connected between the first sealing portions 1131 and the second sealing portions 1132. The first sealing portion 1131 and the second sealing portion 1132 are folded toward the third sealing portion 1133, respectively. The circuit board 12 is disposed on a surface constituted by a part of the third sealing portion 1133 and a part of the top surface 1121. The circuit board 12 includes a flexible circuit board 126 and a reinforcing plate 127 disposed on a side of the flexible circuit board 126 facing the top surface 1121. The projections of the first sealing portion 1131, the second sealing portion 1132 and the reinforcing plate 127 on the plane of the top surface of the battery 10d do not overlap.

Referring to fig. 47, the longitudinal direction of the battery 10d is the X-axis direction, and the thickness direction of the battery 10d is the Y-axis direction. The Y-axis direction is perpendicular to the X-axis direction.

In this application, by changing the structure of the reinforcing plate 127 to cooperate with the first sealing portion 1131 and the second sealing portion 1132, the problem that the space of the battery 10d in the length direction (i.e. the X-axis direction) is wasted due to the overlapping arrangement of the first sealing portion 1131 and the second sealing portion 1132 with the circuit board 12 is avoided, and the space utilization of the battery 10d in the length direction is improved, thereby achieving the purpose of improving the battery capacity.

Further, referring to fig. 46, an electrical connector 121a is disposed on a surface of the circuit board 12 facing away from the battery cell 11. The electrical connector 121a is electrically connected to the battery cell 11.

The battery 10d in the present application will be specifically described by way of examples.

Example 4.1

Referring to fig. 46, a battery 10d includes a cell 11 and a circuit board 12 electrically connected to the cell 11.

Referring to fig. 47 and 48, the battery cell 11 includes a package 111. The package 111 includes a main body 112a and a top seal 113a. The body 112a includes a top surface 1121, a bottom surface 1122 facing away from the top surface 1121, and a side surface 1123 connected between the top surface 1121 and the bottom surface 1122. In example 4.1, the main body 112a has a rectangular parallelepiped structure. In other embodiments, the main body 112a is not limited to a rectangular parallelepiped structure, and may have a columnar structure or the like.

Referring to fig. 47 and 48, the top sealing portion 113a extends from the top surface 1121 and is folded toward the top surface 1121. The top sealing portion 113a includes two first sealing portions 1131 and second sealing portions 1132 disposed opposite to each other, and a third sealing portion 1133 connected between the first sealing portions 1131 and the second sealing portions 1132. The first sealing portion 1131 and the second sealing portion 1132 are folded toward the third sealing portion 1133, respectively.

In embodiment 4.1, referring to fig. 46, 47, 49 and 50, the circuit board 12 includes a flexible circuit board 126 and a reinforcing plate 127 disposed on a side of the flexible circuit board 126 facing the top surface 1121. The reinforcing plate 127 is disposed on a surface constituted by a part of the third sealing portion 1133 and a part of the top surface 1121. The flexible circuit board 126 includes a first end 1261 facing the first seal 1131 and a second end 1262 facing the second seal 1132. Wherein, in the width direction (i.e., the Z-axis direction) of the battery 10d, the first end portion 1261 protrudes with respect to the reinforcing plate 127 to form a first accommodating space 1263 together with the reinforcing plate 127. The second end portion 1262 protrudes relative to the reinforcing plate 127 to form a second accommodating space 1264 together with the reinforcing plate 127. A part of the first sealing portion 1131 is accommodated in the first accommodating space 1263, and a part of the second sealing portion 1132 is accommodated in the second accommodating space 1264. At this time, the projections of the first sealing portion 1131, the second sealing portion 1132, and the reinforcing plate 127 on the plane of the top face 1121 of the battery 10d do not overlap.

Wherein the Z-axis direction is perpendicular to the X-axis direction and the Y-axis direction.

In this application, the reinforcing plate 127 is retracted relative to the flexible circuit board 126, so as to create a first accommodating space 1263 accommodating the first sealing portion 1131 and a second accommodating space 1264 accommodating the second sealing portion 1132 for the first sealing portion 1131 and the second sealing portion 1132, thereby greatly improving the space utilization rate of the battery 10d in the length direction, and further achieving the purpose of improving the battery capacity.

In embodiment 4.1, referring to fig. 47 and 48, the package 111 further includes two side seals 114a disposed opposite to each other. Both side seals 114a extend from the side face 1123 and connect the first seal 1131 and the second seal 1132, respectively. The side seals 114a are folded toward the side 1123, respectively. In some embodiments, at least one of the side seals 114a may be omitted.

Further, referring to fig. 46, 47 and 49, two electrical connectors 121a are disposed on the surface of the flexible circuit board 126 facing away from the reinforcing plate 127. The battery 11 further includes a first tab 115a and a second tab 116a having a polarity different from that of the first tab 115 a. The first tab 115a and the second tab 116a extend from the third sealing portion 1133 and are electrically connected to the two electrical connectors 121a, respectively.

The battery cell 11 further includes an electrode assembly (not shown) and an electrolyte (not shown). The electrode assembly and the electrolyte are contained in the main body 112 a.

The electrode assembly may be of a structure common in the art.

Illustratively, the electrode assembly includes a positive electrode sheet, a separator, and a negative electrode sheet. The positive electrode sheet, the separator, and the negative electrode sheet are wound or laminated to form the electrode assembly. The first tab 115a is electrically connected to the positive electrode plate, and the second tab 116a is electrically connected to the negative electrode plate.

Further, referring to fig. 46 and 50, the circuit board 12 further includes an external connector 128. The external connector 128 is electrically connected to the flexible circuit board 126. Wherein, the external connector 128 is a terminal wire, a golden finger or a connector.

Referring to fig. 51, the embodiment of the present application also discloses a battery 20a. The battery 20a includes a battery cell 11 and a circuit board 12 electrically connected to the battery cell 11. Referring to fig. 52 and 53, the battery 11 includes a package 111. The package 111 includes a main body 112a and a top seal 113a. The body portion 112a includes a top surface 1121. The top seal 113a extends from the top surface 1121 and is folded toward the top surface 1121. The top sealing portion 113a includes two first sealing portions 1131 and second sealing portions 1132 disposed opposite to each other, and a third sealing portion 1133 connected between the first sealing portions 1131 and the second sealing portions 1132. The first sealing portion 1131 and the second sealing portion 1132 are folded toward the third sealing portion 1133, respectively. The circuit board 12 is disposed on a surface constituted by a part of the third sealing portion 1133 and a part of the top surface 1121. Wherein, the projections of the first sealing portion 1131, the second sealing portion 1132 and the circuit board 12 on the plane of the top surface 1121 do not overlap (refer to fig. 53, 55, 56, 57 and 58).

In this application, through the design that the projection of the first sealing portion 1131, the second sealing portion 1132, and the circuit board 12 on the plane where the top surface 1121 is located is not overlapped, the problem that the space of the battery 20a in the length direction (i.e. the X-axis direction) is wasted due to the overlapping arrangement of the first sealing portion 1131, the second sealing portion 1132, and the circuit board 12 is avoided, the space utilization of the battery 10d in the length direction is improved, and the purpose of improving the battery capacity is further achieved.

Further, referring to fig. 56, an electrical connector 121a is disposed on a surface of the circuit board 12 facing away from the battery cell 11. The electrical connector 121a is electrically connected to the battery cell 11.

The battery 20a in the present application is specifically described below by way of examples.

Example 4.2

Referring to fig. 51, a battery 20a includes a cell 11 and a circuit board 12 electrically connected to the cell 11.

Referring to fig. 52 and 53, the battery 11 includes a package 111. The package 111 includes a main body 112a and a top seal 113a. The body 112a includes a top surface 1121, a bottom surface 1122 facing away from the top surface 1121, and a side surface 1123 connected between the top surface 1121 and the bottom surface 1122. In embodiment 4.2, the main body 112a has a rectangular parallelepiped structure. In other embodiments, the main body 112a is not limited to a rectangular parallelepiped structure, and may have a columnar structure or the like.

Referring to fig. 52 and 53, the top sealing portion 113a extends from the top surface 1121 and is folded toward the top surface 1121. The top sealing portion 113a includes two first sealing portions 1131 and second sealing portions 1132 disposed opposite to each other, and a third sealing portion 1133 connected between the first sealing portions 1131 and the second sealing portions 1132. The first sealing portion 1131 and the second sealing portion 1132 are folded toward the third sealing portion 1133, respectively.

Referring to fig. 51 and 53, the circuit board 12 is disposed on a surface formed by a portion of the third sealing portion 1133 and a portion of the top surface 1121.

In embodiment 4.2, referring to fig. 51, 52 and 53, the first sealing portion 1131 is provided with a first notch 1134 opposite to the circuit board 12, and the second sealing portion 1132 is provided with a second notch 1135 opposite to the circuit board 12. At this time, the projections of the first sealing portion 1131, the second sealing portion 1132, and the circuit board 12 on the plane of the top surface 1121 do not overlap.

Referring to fig. 51, 52 and 53, in this application, by forming a first notch 1134 opposite to the circuit board 12 on the first sealing portion 1131, and forming a second notch 1135 opposite to the circuit board 12 on the second sealing portion 1132, the problem of space waste of the battery 20a in the length direction caused by overlapping the first sealing portion 1131, the second sealing portion 1132 and the circuit board 12 is avoided, so that the space utilization rate of the battery 20a in the length direction is improved, and the purpose of improving the battery capacity is further achieved.

In embodiment 4.2, referring to fig. 52, the package 111 further includes two side seals 114a disposed opposite to each other. Both side seals 114a extend from the side face 1123 and connect the first seal 1131 and the second seal 1132, respectively. The side seals 114a are folded toward the side 1123, respectively. In some embodiments, at least one of the side seals 114a may be omitted.

Further, referring to fig. 51, 52 and 53, two electrical connectors 121a are disposed on the surface of the circuit board 12 facing away from the battery cell 11. The battery 11 further includes a first tab 115a and a second tab 116a having a polarity different from that of the first tab 115 a. The first tab 115a and the second tab 116a extend from the third sealing portion 1133 and are electrically connected to the two electrical connectors 121a, respectively.

The electrode assembly may be of a structure common in the art.

Example 4.3

Embodiment 4.3 is different from embodiment 4.2 in the structure of the first sealing portion 1131 and the second sealing portion 1132. That is, the first seal 1131 in example 4.3 has no first notch 1134 in example 4.2, and the second seal 1132 in example 4.3 has no second notch 1135 in example 4.2.

In embodiment 4.3, referring to fig. 54, the first sealing portion 1131 includes a first corner 1136 opposite the circuit board 12. The second sealing portion 1132 includes a second corner portion 1137 opposite the circuit board 12. The first corner portion 1136 is provided with a first crease 1138, and the second corner portion 1137 is provided with a second crease 1139. The first corner portion 1136 is folded along the first fold 1138, the second corner portion 1137 is folded along the second fold 1139, and at this time, the projections of the first sealing portion 1131, the second sealing portion 1132 and the circuit board 12 on the plane of the top surface 1121 do not overlap.

In this application, by folding the first corner portion 1136 and the second corner portion 1137, the problem of space waste of the battery 20a in the length direction caused by overlapping the first sealing portion 1131 and the second sealing portion 1132 with the circuit board 12 is avoided, so that the space utilization of the battery 20a in the length direction is improved, and the purpose of improving the battery capacity is achieved.

Example 4.4

Referring to fig. 55, a battery 20a includes a cell 11 and a circuit board 12 electrically connected to the cell 11.

Referring to fig. 47 and 48, the battery cell 11 includes a package 111. The package 111 includes a main body 112a and a top seal 113a. The body 112a includes a top surface 1121, a bottom surface 1122 facing away from the top surface 1121, and a side surface 1123 connected between the top surface 1121 and the bottom surface 1122. In example 4.4, the main body 112a has a rectangular parallelepiped structure. In other embodiments, the main body 112a is not limited to a rectangular parallelepiped structure, and may have a columnar structure or the like.

Referring to fig. 47 and 55, the circuit board 12 is disposed on a surface formed by a part of the third sealing portion 1133 and a part of the top surface 1121.

In embodiment 4.4, referring to fig. 55, the circuit board 12 includes a first side 122a, a second side 123a opposite to the first side 122a, a third side 124a, and a fourth side 125a opposite to the third side 124 a. The first side 122a and the second side 123a are connected between the third side 124a and the fourth side 125a, respectively. The first side 122a is provided with a third notch 1221, and the second side 123a is provided with a fourth notch 1231. A portion of the first sealing portion 1131 is correspondingly received in the third notch 1221, and a portion of the second sealing portion 1132 is correspondingly received in the fourth notch 1231. At this time, the projections of the first sealing portion 1131, the second sealing portion 1132, and the circuit board 12 on the plane of the top surface 1121 do not overlap.

In this application, the space-avoiding design is made in the overlapping area of the circuit board 12 and the first sealing portion 1131 and the second sealing portion 1132 (i.e., the design of forming the first notch 1134 and the second notch 1135 on the circuit board 12), so that the problem that the space of the battery 20a in the length direction is wasted due to the overlapping arrangement of the first sealing portion 1131 and the second sealing portion 1132 with the circuit board 12 is avoided, thereby improving the space utilization rate of the battery 20a in the length direction, and further achieving the purpose of improving the battery capacity.

In example 4.4, referring to fig. 55, the third notch 1221 is triangular, and the fourth notch 1231 is triangular.

Referring to fig. 56, in some embodiments, the third notch 1221 is arcuate and the fourth notch 1231 is arcuate.

In other embodiments, the third notch 1221 is semicircular, hexagonal, or octagonal, and the fourth notch 1231 is semicircular, hexagonal, or octagonal.

In embodiment 4.4, referring to fig. 47 and 48, the package 111 further includes two side seals 114a disposed opposite to each other. Both side seals 114a extend from the side face 1123 and connect the first seal 1131 and the second seal 1132, respectively. The side seals 114a are folded toward the side 1123, respectively. In some embodiments, at least one of the side seals 114a may be omitted.

Further, referring to fig. 47 and 55, two electrical connectors 121a are disposed on the surface of the circuit board 12 facing away from the battery cell 11. The battery 11 further includes a first tab 115a and a second tab 116a having a polarity different from that of the first tab 115 a. The first tab 115a and the second tab 116a extend from the third sealing portion 1133 and are electrically connected to the two electrical connectors 121a, respectively.

The electrode assembly may be of a structure common in the art.

Example 4.5

Referring to fig. 57, the difference between the embodiment 4.5 and the embodiment 4.4 is that the third notch 1221 in the embodiment 4.5 is formed at the connection between the third side 124a and the first side 122a, and the fourth notch 1231 in the embodiment 4.5 is formed at the connection between the third side 124a and the second side 123 a.

In example 4.5, referring to fig. 58, the third notch 1221 is triangular, and the fourth notch 1231 is triangular.

Referring to fig. 58, in some embodiments, the third notch 1221 is arcuate and the fourth notch 1231 is arcuate.

Referring to fig. 59, the embodiment of the present application further provides an electronic device 100d. The electronic device 100d includes the battery 10d/20a described above.

The electronic device 100d may be a mobile electronic device, an energy storage device, an electric vehicle, a hybrid electric vehicle, or the like. The mobile electronic device may be a mobile phone, a wearable electronic device, a tablet computer, a notebook computer, etc.

In addition, various other corresponding changes and modifications may be made by those skilled in the art in light of the technical concepts of the present application, and all such changes and modifications are intended to be within the scope of the claims of the present application.

Claims

1. A battery comprises a battery core and a tab electrically connected with the battery core, wherein the battery core comprises a packaging bag, the packaging bag comprises a main body part and a top sealing part, the main body part comprises a top surface, the top sealing part extends out of the top surface,

The pole lugs extend out from the top sealing part;

it is characterized in that the method comprises the steps of,

the battery also comprises an insulating piece, wherein the insulating piece comprises a built-in part positioned in the top sealing part and an extension part extending out of the top sealing part, the tab is penetrated through the insulating piece to be isolated from the top sealing part, and the extension part is connected with the built-in part and is bent towards the top sealing part;

the extension part comprises two corner parts which are respectively positioned at two sides of the pole lug, and the two corner parts are respectively provided with a notch structure.

2. The battery of claim 1, wherein the extension forms the notched structure by cutting the corner or by folding the corner.

3. The battery of claim 1, wherein the line of intersection of the notch structure with the extension is an arc, a diagonal, or a multi-segment line.

4. The battery of claim 1, wherein the notch structure intersects the side edge of the extension at a point a, the notch structure intersects the top edge of the extension at a point B, and an angle α formed by a line between the point a and the point B and the side edge of the extension satisfies: alpha is more than or equal to 110 degrees and less than or equal to 160 degrees.

5. The cell of claim 4, wherein a distance D from a junction C of the tab and the extension to the point B is 0.1mm to 1mm.

6. The battery of claim 1, wherein the top seal includes two oppositely disposed first and second seals and a third seal connected between the first and second seals, the first and second seals being folded toward the third seal, respectively, the third seal being folded toward the top surface, the interior portion being located within the third seal.

7. The battery of claim 6, further comprising a circuit board electrically connected to the tab, the circuit board disposed on a surface defined by a portion of the top surface and a portion of the top seal.

8. The battery of claim 7, wherein the circuit board comprises a flexible circuit board and a reinforcing plate disposed on the flexible circuit board and facing the top surface, the reinforcing plate is disposed on a surface formed by a part of the third sealing portion and a part of the top surface, the reinforcing plate comprises a first surface facing the first sealing portion and a second surface facing the second sealing portion, the first surface is recessed inwards to form a first accommodating space, the second surface is recessed inwards to form a second accommodating space, a part of the first sealing portion is accommodated in the first accommodating space, and a part of the second sealing portion is accommodated in the second accommodating space.

9. An electronic device comprising the battery according to any one of claims 1 to 8.

10. The battery comprises a battery core, wherein the battery core comprises a packaging bag, the packaging bag comprises a main body part, a top sealing part and at least one side sealing part, the main body part comprises a top surface, a bottom surface opposite to the top surface and a side surface connected between the top surface and the bottom surface, and the top sealing part extends out from the top surface; the side seal part extends from the side surface and is connected with the top seal part, and the side seal part extends outwards in the length direction of the battery;

it is characterized in that the method comprises the steps of,

the side edge of the side seal part, which is away from the side face, is intersected with the side edge of the top seal part, which is away from the top face, and forms an included angle, a first notch is arranged at the intersection of the top seal part and the side seal part, the first notch is separated from the included angle, and the side seal part is folded towards the side face along the connection edge of the side seal part, which is intersected with the main body part; the top sealing part and the intersection part of the side sealing part and the top sealing part are folded towards the top surface, and the projection of the top sealing part and the part folded towards the top surface, on the plane of the top surface of the battery, of the side sealing part is all located in the range of the top surface.

11. The battery of claim 10, wherein the side seal includes a corner adjacent the first segment, the corner folded toward the top seal.

12. The battery of claim 10, wherein the side seal includes a corner adjacent the first cutout, the corner having a second cutout formed therein.

13. The battery of claim 10, wherein the cell further comprises an electrode assembly and a tab, the electrode assembly being received in the body portion, the tab being electrically connected to the electrode assembly and extending from within the top seal.

14. An electronic device comprising a battery as claimed in any one of claims 10 to 13.

15. The battery comprises a battery core and a circuit board electrically connected with the battery core, wherein the battery core comprises a packaging bag, the packaging bag comprises a main body part and a top sealing part, the main body part comprises a top surface, the top sealing part extends out of the top surface and is folded towards the top surface, the top sealing part comprises a first sealing part and a second sealing part which are oppositely arranged, and a third sealing part which is connected between the first sealing part and the second sealing part, the first sealing part and the second sealing part are respectively folded towards the third sealing part, and the circuit board is arranged on a surface formed by part of the third sealing part and part of the top surface;

It is characterized in that the method comprises the steps of,

the circuit board comprises a flexible circuit board and a reinforcing plate arranged on one side of the flexible circuit board, which faces the top surface, the corresponding area of the reinforcing plate is the reinforcing area of the circuit board, the reinforcing plate is arranged on the surface formed by the third sealing part and the top surface, the flexible circuit board comprises a first end part facing the first sealing part, the first end part protrudes relative to the reinforcing plate in the width direction of the battery, so that a first accommodating space is formed together with the reinforcing plate, and the first sealing part is accommodated in the first accommodating space.

16. The battery of claim 15, wherein the first seal includes a first corner portion opposite the circuit board, the second seal includes a second corner portion opposite the circuit board, a first crease is provided on the first corner portion, a second crease is provided on the second corner portion, the first corner portion is folded along the first crease, and the second corner portion is folded along the second crease.

17. The battery of claim 15, wherein the first seal portion defines a first notch opposite the circuit board and the second seal portion defines a second notch opposite the circuit board.

18. The battery of claim 15, wherein the circuit board includes a first side, a second side opposite the first side, a third side, and a fourth side opposite the third side, the first side and the second side being connected between the third side and the fourth side, respectively, wherein,

a third notch is formed in the first side surface, a fourth notch is formed in the second side surface, a part of the first sealing part is correspondingly accommodated in the third notch, and a part of the second sealing part is correspondingly accommodated in the fourth notch;

or a third gap is formed at the joint of the third side surface and the first side surface, a fourth gap is formed at the joint of the third side surface and the second side surface, part of the first sealing part is correspondingly accommodated in the third gap, and part of the second sealing part is correspondingly accommodated in the fourth gap.

19. The battery according to claim 15, wherein the flexible circuit board includes a second end portion facing the second sealing portion, wherein the second end portion protrudes with respect to the reinforcing plate in a width direction of the battery to form a second accommodation space together with the reinforcing plate, and a part of the second sealing portion is accommodated in the second accommodation space.

20. An electronic device comprising a battery as claimed in any one of claims 15 to 19.