CN114747070A - Battery, battery pack, and electronic device - Google Patents

Abstract

A battery assembly comprises a cell main body, an encapsulation film and a tab. The packaging film comprises a main body part, a top sealing edge and a side sealing edge. The main body portion wraps the battery cell main body and comprises a first surface, a second surface, a top wall and a side wall, the first surface and the second surface are arranged in a back-to-back mode, 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 sealing edge is arranged on the side wall and extends towards the second surface direction. The tab comprises a first end and a second end which are opposite to each other, the first end is connected with the battery cell main body, and the second end is located outside the packaging film. The battery pack also comprises a lead and/or a flexible circuit board welded with the second end. The battery pack is advantageous in reduction of volume. The application also provides a battery, a battery pack and an electronic device.

Description

Battery, battery pack, and electronic device Technical Field

The present disclosure relates to a battery, 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 pack is challenging.

Disclosure of Invention

In view of the above, it is desirable to provide a battery pack and a battery that have a simple structure and are advantageous in volume reduction.

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

The battery pack as one aspect of the present application includes a cell main body, an encapsulation film, and tabs. The packaging film includes a main body portion, a top seal edge, and a side seal edge. The main body part coats the battery cell main body. The main body portion comprises a first surface, a second surface, a top wall and a side wall, the first surface and the second surface are arranged in a back-to-back mode, 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 seal edge is arranged on the top wall and extends towards the first surface direction. The side seal edge is arranged on the side wall and extends towards the second surface direction. The tab comprises a first end and a second end which are opposite to each other, the first end is connected with the battery cell main body, and the second end is located outside the packaging film. The battery pack further comprises a lead and/or a flexible circuit board, and the lead and/or the flexible circuit board is welded with the second end.

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

As an aspect of the present application, the side sealing edge 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 an aspect of the present application, an electronic device includes the battery pack as described above.

The above-mentioned battery pack of this application simple structure, the top banding with the side banding extends towards opposite direction, makes the thickness that connecting portion piled up among the battery pack reduces, thereby has reduced battery pack's volume has also reduced hem stress simultaneously, has reduced the damaged probability of connecting portion hem. And leads and/or flexible circuit boards are welded on the lugs in the battery component, so that the battery component is convenient to flexibly connect with an external electronic element, and the reduction of the volume of the battery component is facilitated. Further, the top seal edge, the side seal edge and/or the tab are located between the first surface and the second surface, so that the volume of the battery assembly can be further reduced.

The battery as another scheme of this application includes electric core and circuit board. The battery cell comprises a packaging bag and a tab. The wrapping bag includes main part and top banding, the main part includes the top surface, the top banding by the top surface extends, the top banding court main part direction is buckled to cover the part the top surface. The pole ear extends out from the top sealing edge. The circuit board is arranged on the top surface. The circuit board is provided with a clearance groove corresponding to the position of the lug, the lug bends towards the direction of 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 empty avoiding groove penetrates through the upper surface and the lower surface, and the lug is electrically connected with the circuit board on the upper surface.

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

As a scheme of this application, electric core includes two utmost point ear, the circuit board corresponds each the position of utmost point ear is equipped with one keep away the dead slot.

As a scheme of the application, the two clearance grooves are communicated with each other.

As a scheme of this application, be provided with first sealing member and second sealing member in the top banding, first sealing member is used for keeping apart top banding with one of them utmost point ear, the second sealing member is used for keeping apart top banding with another utmost point ear, first sealing member is located one of them keep away the dead slot, the second sealing member is located another keep away the dead slot, wherein, first sealing member the second sealing member with the circuit board is in the projection of top surface does not overlap.

The battery pack as one aspect of the present application includes a circuit board and a plurality of horizontally arranged cells. Each electric core includes wrapping bag and utmost point ear. The wrapping bag includes main part and top banding, the main part includes the top surface, the top banding by the top surface extends, the top banding court main part direction is buckled to it covers the part the top surface. The tab extends out of the top seal edge; the circuit board is arranged on the surface formed by the top surfaces of the plurality of horizontally arranged battery cores. And the circuit board is provided with a clearance groove corresponding to the position of each tab of the battery cell, and the tabs are bent towards the direction of the clearance grooves and are electrically connected with the circuit board.

As a scheme of the present application, 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 according to an aspect of the present application includes the battery described above.

In a battery pack according to an aspect of the present application, the battery pack includes a plurality of the battery cells as described above, and the plurality of the battery cells are vertically arranged or stacked.

Above-mentioned battery in this application utilizes the design of avoiding the dead slot, for utmost point ear provides the space of buckling, avoids the regional part of buckling utmost point ear is relative electric core protrusion is in order to improve the battery is at the ascending space utilization of thickness side, saves the encapsulation space of battery to provide more spaces for electric core, and then reach the purpose that promotes battery capacity.

The battery as another aspect of the present application includes a battery cell and a tab electrically connected to the battery cell. The electric 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 top surface is folded, and the pole lug extends out of the top sealing part. The battery further comprises an insulating piece, the insulating piece comprises a built-in portion located in the top sealing portion and an extending portion extending to the outside of the top sealing portion, the lug is arranged in the insulating piece in a penetrating mode to be isolated from the top sealing portion, and the extending portion is connected with the built-in portion and bends towards the top sealing portion. The extension portion comprises two corner portions which are respectively located on two sides of the lug, and notch structures are arranged on the corner portions.

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

As a scheme of the application, the intersection line of the notch structure and the extending part is an arc line, a slant line or a multi-segment line.

As a solution of the present application, the notch structure intersects with the side edge of the extension portion at a point a, the notch structure intersects with the top edge of the extension portion at a point B, and an included angle α formed by a connection line of 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 a scheme of this application, the distance D of meeting point C of utmost point ear with extension portion to point B is 0.1mm-1 mm.

As an aspect of the present application, the top sealing portion includes a first sealing portion and a second sealing portion that are disposed opposite to each other, and a third sealing portion connected between the first sealing portion and the second sealing portion, the first sealing portion and the second sealing portion are respectively folded toward the third sealing portion, the third sealing portion is folded toward the top surface, and the built-in portion is located in the third sealing portion.

As a scheme of this application, the battery still includes the electricity and connects the circuit board of utmost point ear, the circuit board sets up in part the top surface and part the surface that the overseal constitutes.

As a scheme of this application, the circuit board include the flexible circuit board with set up in the flexible circuit board orientation the stiffening plate of top surface, the stiffening plate sets up in the part third sealing and part the surface that the top surface constitutes, the stiffening plate includes the orientation the first surface of first sealing and orientation the second surface of second sealing, the first surface is inside sunken to form first accommodating space, the second surface is inside sunken to form second accommodating space, and the part first sealing accept in first accommodating space, part the second sealing accept in second accommodating space.

An electronic device according to an aspect of the present application includes the battery described above.

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

A battery according to still another aspect of the present application includes a battery 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 back to the top surface and a side surface connected between the top surface and the bottom surface, and the top sealing part extends out of the top surface. The side sealing part extends out from the side surface and is connected with the top sealing part, and the side sealing part extends outwards in the length direction of the battery. The intersection of the top seal part and the side seal part is provided with a first notch part, and the side seal part is folded towards the side surface along the connection edge of the intersection of the side seal 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 entirely positioned in the range of the top surface.

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

As an aspect of the present application, the side sealing portion includes an angular portion close to the first notch portion, and the angular portion has a second notch portion.

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

An electronic device according to an aspect of the present application includes the battery described above.

Above-mentioned battery in this application sets up first scarce portion through the crossing department at top seal portion and side seal portion, and top seal portion and side seal portion after avoiding folding are relative the battery protrusion has saved the encapsulation space of battery. So, when being applied to electronic device with the battery, for example, accept the battery in during battery compartment among the electronic device, because in this application battery top seal portion and side seal portion can not be relative after folding the battery is protruding, when having made things convenient for the battery installation, still reduced the battery is in the space occupancy of battery compartment has improved the space utilization of battery compartment.

The battery as another scheme of this application, including electric core and the electricity connect the circuit board of electric core. The battery cell comprises a packaging bag. The wrapping bag includes main part and top seal portion, the main part includes the top surface, top seal portion by the top surface extends, and towards the top surface is folding. The top sealing part comprises a first sealing part and a second sealing part which are oppositely arranged and a third sealing part 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 does not overlap with the projection of the circuit board or the reinforcement area in the circuit board on the plane of the top surface.

As a scheme of this application, first sealing include with the first angle portion that the circuit board is relative, the second sealing include with the second angle portion that the circuit board is relative, be equipped with first crease on the first angle portion, be equipped with the second crease on the second angle portion, first angle portion is followed a crease is folding, second angle portion is followed the second crease is folding.

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

As an aspect of the present application, the circuit board includes a first side surface, a second side surface facing away from the first side surface, a third side surface, and a fourth side surface facing away from the third side surface, and the first side surface and the second side surface are respectively connected between the third side surface and the fourth side surface. The first side surface is provided with a third gap, the second side surface is provided with a fourth gap, 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; 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 area corresponding to the reinforcing plate is a reinforcing area of the circuit board, the reinforcing plate is arranged on the surface formed by part of the third sealing part and part of the top surface, the flexible circuit board includes a first end portion facing the first sealing part and a second end portion facing the second sealing part, wherein the first end portion protrudes relative to the reinforcing plate in a width direction of the battery, so as to form a first accommodating space together with the reinforcing plate, the second end part protrudes relative to the reinforcing plate, so as to form a second accommodating space together with the reinforcing plate, part of the first sealing part is accommodated in the first accommodating space, and part of the second sealing part is accommodated in the second accommodating space.

An electronic device according to an aspect of the present application includes the battery described above.

Above-mentioned battery in this application, through changing first sealing with the structure of second sealing the structure of circuit board, perhaps the structure of stiffening plate is avoided first sealing with the second sealing with the overlapping of circuit board sets up, and the extravagant problem in the ascending space of length direction of the battery that leads to improves the space utilization of battery on length direction, and then reaches the purpose that promotes battery capacity.

Drawings

Fig. 1 is a perspective view illustrating a partial structure of a battery module according to an embodiment of the present disclosure.

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

Fig. 3 is a perspective view schematically illustrating a partial structure of a battery module according to another embodiment of the present disclosure.

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

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

Fig. 6 is a perspective view of a battery module according to an embodiment of the present disclosure.

Fig. 7 is a perspective view of a battery module according to another embodiment of the present disclosure.

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

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

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 of fig. 10.

Fig. 14 is a schematic view of the circuit board, first electrical connector and second electrical connector of 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 of fig. 15.

FIG. 17 is a schematic view of the circuit board, first electrical connector and second electrical connector of 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 block diagram of an electronic device according to an embodiment of the present application.

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

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

FIG. 26 is an enlarged view of II of FIG. 24.

Fig. 27 is a top view of the battery shown in fig. 24 with the tab unbent.

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

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

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

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

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

Fig. 37 is a developed view of the battery shown in fig. 36.

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

Fig. 39 is a schematic view of the pair of cells of fig. 38 from another perspective.

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 a development view of a battery according to another embodiment of the present application.

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

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

Fig. 45 is a development 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 shown in fig. 47.

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

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

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

Fig. 52 is an expanded view of the battery cell shown in fig. 51.

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

Fig. 54 is a development view of a battery 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 block diagram of an electronic device according to an embodiment of the present application.

Description of the main elements

The angular portion 1141 of the external element 125 of the battery assembly 100

Second gap 1142 of empty avoiding groove 13 of packaging film 30

First gap 115 of first empty-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 edge banding 35 positive plate 1171 of battery pack 300

Second end 53 circuit board 310 isolation diaphragm 1172

First surface 311 clear groove 32 negative plate 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 electrical connector 13c for main body portion 112a

Electronic device 100c with top surface 1121 of connecting portion 37

First turnover region 371 top seal 113a for batteries 10d, 20a

Second turnover region 373 first sealing portion 1131 first gap 1134

The first connection end 372 and the second seal portion 1132 and the second gap 1135

Second attachment end 374 third seal portion 1133 first angled portion 1136

Second angular portion 1137 of tab 12a of lead 60

Flexible circuit board 70 first fold 1138 of insulator 130

Second fold 1139 of inner 131 of electric connector 61, 73

First tab 115a of the extension portion 132 of the golden finger 71

Corner 1321 of electronic device 100a and second tab 116a

Cell 10 gap structure 1322 electrical connector 121a

First side 122a of side 1323 of battery cell 11

Third notch 1221 in top edge 1324 of bag 111

Intersection line 133 of main body portion 1111 and second side surface 123a

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

Top surface 1113 flexible circuit board 141 third side 124a

Bottom 1114 of the stiffener 142 is a fourth side 125a

Side 1115 first surface 1421 flexible circuit board 126

Second surface 1422 of tab 112 first end 1261

First tab 112c first receiving space 1423 second end 1262

Second tab 112d, second receiving space 1424 and first receiving space 1263

First sealing member 113, electric connecting member 143 and second accommodating space 1264

Second seal 114 cell 10c stiffener 127

External connector 128 on bottom 1122 of circuit boards 12 and 14

Lower surface 121 side 1123 electronic device 100d

First electrical connector 123 of upper surface 122 edge seal 114a

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

Detailed Description

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

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

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

Referring to fig. 1 to 9, a battery assembly 100 includes a cell body (not shown), an encapsulation film 30, and tabs 50. The encapsulation film 30 includes a body portion 31, a top seal edge 33, and a side seal edge 35. The top sealing edge 33 and the side sealing edge 35 are respectively connected with 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 cell main body, and the second end 53 is located outside the encapsulation 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 sidewall 317. The first surface 311 is opposite to the second surface 313, the top wall 315 connects the first surface 311 and the second surface 313, and the sidewalls 317 connect the first surface 311, the second surface 313 and the top wall 315.

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

The side sealing edge 35 is disposed on the sidewall 317, and the side sealing edge 35 extends from the sidewall 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 sealing edge 33 and the side sealing edge 35. The connecting portion 37 includes a first turnover region 371 and a second turnover region 373 connected to the first turnover region 371. The first turnover area 371 includes a first connection end 372, the first connection end 372 is connected to the top sealing edge 33, and the second turnover area 373 includes a second connection end 374, and the second connection end 374 is connected to the side sealing edge 35.

In some embodiments, referring to fig. 1 and 2, the second turnover region 373 is bent from the second connection end 374 at a side of the side edge seal 35 facing away from the sidewall 317. Wherein, an included angle between the second turnover area 373 and the side sealing edge 35 is less than 90 °. The first turnover area 371 is bent from the first connection end 372 toward the sidewall 317.

In other embodiments, referring to fig. 3 and 4, the first turnover area 371 is bent from the first connection end 372 at a side of the top sealing edge 33 away from the top wall 315. Wherein the included angle between the first turnover area 371 and the top sealing edge 33 is less than 90 °. The second turnover area 373 is bent from the second connection end 374 toward the top wall 315.

In other embodiments, referring to fig. 5, the battery assembly 100 includes both the arrangements shown in fig. 2 and fig. 4. That is, the connecting portion 37 between one of the side seals 35 and the top seal 33 is disposed as shown in fig. 2, and the second folded-back region 373 is bent from the second connecting end 374 at a side of the side seal 35 away from the sidewall 317. The included angle between the second folded-over region 373 and the side edge seal 35 is less than 90 °, and the first folded-over region 371 is bent from the first connection end 372 toward the sidewall 317; the connection portion 37 of the other side edge banding 35 and the top edge banding 33 is arranged as shown in fig. 3, and the first turning area 371 is bent from the first connection end 372 at a side of the top edge banding 33 away from the top wall 315. The included angle between the first folded-over region 371 and the top sealing edge 33 is smaller than 90 °, and the second folded-over region 373 is bent 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, so as to reduce the volume of the battery assembly 100. In other embodiments, the top seal 33 may also protrude from the first surface 311.

Preferably, the side sealing edge 35 is located between the first surface 311 and the second surface 313, that is, the side sealing edge 35 does not protrude from the second surface 313, so as to reduce the volume of the battery assembly 100. In other embodiments, the side seal 35 may protrude from the second surface 313.

The tab 50 may extend from the top seal edge 33 and also from the side seal edge 35. In the present application, the tab 50 is further described by way of example as protruding from the top seal 33.

Referring to fig. 3, the portions of the tabs 50 outside the encapsulation film 30 are disposed perpendicular to the top wall 315. Referring to fig. 1, the portion of the tab 50 outside the packaging film 30 may also be disposed parallel to the top wall 315. In other embodiments, the portion of the tab 50 outside of the encapsulation 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 lead 60 or/and a flexible circuit board 70, and the lead 60 or/and the flexible circuit board 70 is soldered to the second end 53 for electrical connection. The welding may be laser welding, ultrasonic welding or thermocompression welding.

Referring to fig. 6 and 7, in the present embodiment, the end of the lead 60 connected to the second end 53 is flat for welding. In some embodiments, the end of the lead 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 end of the wire 60 away from the second end 53 is provided with an electrical connector 61 for electrically connecting with other electronic components.

Referring to fig. 8, a gold finger 71 is disposed at an end of the flexible circuit board 70 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 electrically connecting 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 the tab and the conducting sheet are welded by laser or ultrasonic.

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

The battery pack 100 is applied to an electronic device (not shown). The electronic device can be, but is not limited to, a mobile phone, a computer, an electric toy, etc. The electronic device further includes external electronic components (not shown), which are electrically connected to the wires 60 and/or the flexible circuit board 70. Specifically, in some embodiments, the external electronic component is thermally compression bonded to the solder on the lead 60 or connected to the electrical connector 61 on the lead 60. In other embodiments, the external electronic components are connected to the gold fingers 71 of the flexible circuit board 70 or to the electrical connectors 73 of the flexible circuit board 70.

Above-mentioned battery pack 100 simple structure of this application, top banding 33 with side banding 35 extends towards opposite direction, makes the thickness that connecting portion 37 piled up in the battery pack 100 reduces, thereby has reduced battery pack 100's volume has also reduced hem stress simultaneously, has reduced the damaged probability of connecting portion 37 hem. The tab 50 of the battery assembly 100 is welded with the lead 60 and/or the flexible circuit board 70, which facilitates flexible connection of external electronic components, thereby facilitating reduction of the volume 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, the present application further discloses a battery 10. 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 packaging bag 111 includes a main body 1111 and a top edge 1112. The body portion 1111 includes a top surface 1113. The top seal 1112 extends from the top surface 1113. The top edge 1112 is bent toward the main body 1111 and covers a portion of the top surface 1113. The tab 112 extends from the top edge 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 clearance groove 13 and electrically connected to the circuit board 12.

Referring to fig. 10, 21 and 12, in the present application, the design of the clearance groove 13 provides a bending space for the tab 112, and prevents the tab 112 from protruding relative to the battery cell 11 in the bending region a, so as to improve the space utilization rate of the battery 10 in the thickness direction (i.e., the X-axis direction), and save the packaging space of the battery 10, thereby providing more space for the battery cell 11, and further achieving the purpose of increasing 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 clearance 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 on the top surface 1113 is entirely located within the top surface 1113. That is, the tab 112 in the bending region a does not protrude from the battery cell 11, so that the space utilization rate 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, thereby providing more space for the battery cell 11, and further achieving the purpose of increasing the battery capacity.

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

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

Further, referring to fig. 10, a first seal 113 and a second seal 114 are disposed within the top seal 1112. The first seal 113 is used to isolate the top sealing edge 1112 from the first tab 112c, and the second seal 114 is used to isolate the top sealing edge 1112 from the second tab 112 d. The first sealing member 113 is located in the first clearance groove 13a, and the second sealing member 114 is located in the second clearance groove 13 b. 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.

In the present application, the design of the clearance groove provides a receiving space for the first sealing member 113 and the second sealing member 114, so as to avoid the overlapping arrangement of the first sealing member 113 and the circuit board 12, and the second sealing member 114 and the circuit board 12 in the length direction (i.e. the Y-axis direction) of the battery 10, so as to effectively improve the space utilization rate of the battery 10 in the length direction. In addition, under the condition that the overall size of the battery 10 is fixed, the layout of the circuit board 12 and the first and second sealing members 113 and 114 is optimized by using the design of the clearance groove, so as to save the packaging space of the battery 10, thereby providing more space for the battery cell 11, and further achieving the purpose of improving the battery capacity.

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

Further, referring to fig. 10, an external connector 125 is disposed on the circuit board 12. The external connector 125 is electrically connected to the circuit board 12. In some embodiments, the external connectors 34 are not limited to flexible circuit boards or terminal wires.

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

The battery 10 and the battery pack 20 according to 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 cell 11 includes a packaging bag 111, a first tab 112c, and a second tab 112 d. The package 111 includes a main body 1111 and a top sealing edge 1112.

Referring to fig. 21, the body portion 1111 includes a top surface 1113, a bottom surface 1114 opposite to 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 portion 1111 has a rectangular parallelepiped structure. In some embodiments, the main body portion 1111 is not limited to have a rectangular parallelepiped structure, and may have a pillar 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 respectively extend from the top edge seal 1112. Wherein the polarity of the first tab 112c is different from the polarity of the second tab 112 d.

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

The electrode assembly may have a structure common in the art.

Illustratively, the electrode assembly includes a positive electrode tab, a separator, and a negative electrode tab. The positive electrode tab, the separator and the negative electrode tab are wound or laminated to form the electrode assembly. The first tab 112c is electrically connected to the positive plate, and the second tab 112d is electrically connected to the negative 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 connection 123 and a second electrical connection 124.

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

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

In example 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.

Further, referring to fig. 10, a first seal 113 and a second seal 114 are disposed within the top seal 1112. The first seal 113 is used for isolating the top sealing edge 1112 and the first tab 112c, and the second seal 114 is used for isolating the top sealing edge 1112 and the second tab 112 d. The first sealing member 113 is located in the first clearance groove 13a, and the second sealing member 114 is located in the second clearance groove 13 b. 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.

Example 1.2

Referring to fig. 15, 16 and 17, embodiment 1.2 differs from embodiment 1.1 in that the first clearance groove 13a and the second clearance groove 13b in embodiment 1.2 communicate with each other.

Example 1.3

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

Example 1.4

Referring to fig. 19, example 1.4 differs from example 1.3 in that the two cells 10 of example 1.4 are arranged vertically.

Example 1.5

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

Example 1.6

Referring to fig. 21, example 1.6 differs from example 1.5 in that the two cells 10 of example 1.6 are arranged vertically.

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 battery cells 11. The circuit board 310 is provided with a clearance groove 32 corresponding to the position of the tab 112 of each electrical core 11. The tab 112 is bent toward the clearance groove 13 and electrically connected to the circuit board 310.

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

Further, the first sealing element 113 and the second sealing element 114 in each capping edge 1112 are respectively located in the clearance groove 32 corresponding thereto.

Referring to fig. 22, the clearance groove 32 penetrates the circuit board 310. The surface of the circuit board 310 facing away from the battery cell 11 is provided with an electrical connector 33 a. The electrical connection member 33a electrically connects 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 connectors 34 are not limited to flexible circuit boards or terminal wires.

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

Referring to fig. 23, the present application further provides an electronic device 100 a. 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, or the like.

Referring to fig. 24, the present application also discloses a battery 10 a. 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 packaging bag 111. The packaging bag 111 includes a main body 112a and a top seal 113 a. The main body 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 inside of the top seal portion 113 a. The battery 10a also includes an insulator 130. The insulating member 130 includes a built-in portion 131 inside the top sealing portion 113a, and an extended portion 132 extending to the outside of the top sealing portion 113 a. The tab 12a is inserted through the insulator 130 to be isolated from the top sealing portion 113 a. The extension portion 132 is connected to the interior portion 131 and bent toward the top sealing portion 113 a. The outward extension portion 132 includes two corner portions 1321 respectively located at both sides of the tab 12 a. Notch structures 1322 are provided on both of the corner portions 1321.

Utilize the design of breach structure 1322 in this application, it is relative after having avoided extension 132 to buckle battery 10a convex problem has improved battery 10a is at the space utilization on the thickness direction (X axle direction promptly), has saved battery 10 a's encapsulation space to for electric core 11 provides more spaces, and then reach the purpose that promotes battery capacity.

Wherein, the insulator 130 is tab glue.

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

Referring to fig. 25, 29, 30, 31 and 32, the intersection line 133 of the notch 1322 and the extension 132 is an arc line, a slant line or a plurality of lines.

Referring to fig. 26, 29, 30, 31, and 32, the notch structure 1322 intersects the side edge 1323 of the extension 132 at point a and the notch structure 1322 intersects the top edge 1324 of the extension 132 at point B. An included angle α formed by a connecting line of the point a and the point B and the side 1323 of the extension portion 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, the distance D from the intersection point C of the tab 12a and the outer extension 132 to the point B is 0.1mm to 1 mm.

In some embodiments, referring to fig. 27, the top seal 113a includes a first seal 1131 and a second seal 1132 disposed opposite to each other and a third seal 1133 connected between the first seal 1131 and the second seal 1132. The first and second seals 1131 and 1132 are folded toward the third seal 1133, respectively. The third sealing portion 1133 is folded toward the top surface 1121. The interior portion 131 is located within the third seal portion 1133.

Referring to fig. 27 and 28, the battery 10a further includes a circuit board 14 electrically connecting the tabs 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 reinforcing plate 142 disposed on the flexible circuit board 141 and facing the top surface 1121. The reinforcing plate 142 is disposed on a surface formed by a portion of the third sealing portion 1133 and a portion of the top surface 1121. The stiffener 142 includes a first surface 1421 facing the first sealing portion 1131 and a second surface 1422 facing the second sealing portion 1132. The first surface 1421 is recessed inward to form a first receiving space 1423. The second surface 1422 is recessed inward to form a second receiving space 1424. A part of the first sealing portion 1131 is received in the first receiving space 1423, and a part of the second sealing portion 1132 is received in the second receiving space 1424.

In the present application, step recess processing is performed on two ends of the reinforcing plate 142, so as to create a first accommodating space 1423 for accommodating the first sealing portion 1131 and a second accommodating space 1424 for accommodating the second sealing portion 1132 for the first sealing portion 1131 and the second sealing portion 1132, so that the space utilization rate 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 below 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 packaging bag 111. The packaging bag 111 includes a main body 112a and a top seal 113 a.

Referring to fig. 24, the main body 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 also have a cylindrical isotactic structure or other irregular structure.

Referring to fig. 24, 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 part 113 a.

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

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

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 line or a multi-segment line.

Referring to fig. 26, the notch structure 1322 intersects the side edge 1323 of the extension 132 at a point a, and the notch structure 1322 intersects the top edge 1324 of the extension 132 at a point B. An included angle α formed by a connecting line of the point a and the point B and the side 1323 of the extension portion 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 the meeting point C of the tab 12a and the outward extension portion 132 to the point B is 0.1mm to 1 mm.

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.

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

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 portion 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 disposed on the flexible circuit board 141 toward the top surface 1121. The reinforcing plate 142 is disposed on a surface formed by a portion of the third sealing portion 1133 and a portion of the top surface 1121. The reinforcing plate 142 includes a first surface 1421 facing the first sealing portion 1131 and a second surface 1422 facing the second sealing portion 1132. The first surface 1421 is recessed inward to form a first receiving space 1423. The second surface 1422 is recessed inward to form a second receiving space 1424. A part of the first sealing portion 1131 is received in the first receiving space 1423, and a part of the second sealing portion 1132 is received in the second receiving space 1424.

Referring to fig. 23, the present embodiment also provides an electronic device 100 b. 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 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, or the like.

Referring to fig. 36, the present application also discloses a battery 10 c. Referring to fig. 37, 38, and 39, the battery 10c includes a battery cell 11. The battery cell 11 includes a packaging bag 111. The package 111 includes a main body 112a, a top seal 113a, and at least one side seal 114 a. 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. The top sealing portion 113a extends from the top surface 1121. The side seal 114a extends from the side surface 1123 and extends outward in the longitudinal direction (i.e., the X-axis direction) of the battery 10c to connect with the top seal 113 a. A first notch 115 is arranged at the intersection of the top seal part 113a and the side seal part 114 a. The side seal 114a is folded along the connecting edge 116 of the side seal 114a that intersects the body portion 112a toward the side surface 1123. The top sealing part 113a and the intersection of the side sealing part 114a and the top sealing part 113a are folded toward the top surface 1121, and the projection of the top sealing part 113a on the plane of the top surface 1121 of the battery 10c is entirely located within the range of the top surface 1121.

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

In the battery 10c, the first notch 115 is formed at the intersection of the top sealing part 113a and the side sealing part 114a, so that the folded top sealing part 113a and the folded side sealing part 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 (see fig. 23), for example, when the battery 10c is accommodated in a battery compartment (not shown) of the electronic device 100c, since the top sealing portion 113a and the side sealing portion 114a of the battery 10c of the present application do not protrude relative to the battery 10c after being folded, the installation of the battery 10c is facilitated, the space occupancy 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 the first notch 115. Wherein the angular portion 1141 is folded toward the top seal portion 113 a; alternatively, the corner portion 1141 is provided with a second notch 1142.

Referring to fig. 44, the second missing portion 1142 is not limited to a regular shape such as a triangle, an arc, a trapezoid, a rectangle, or other irregular shapes.

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

Referring to fig. 37 and 40, the battery cell 11 further includes an electrode assembly 117 and tabs 118. The electrode assembly 117 is housed in the body portion 112 a. The tab 118 is electrically connected to the electrode assembly 117 and extends from the top seal portion 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.

Referring to fig. 36 and 41, the surface of the circuit board 12 opposite to the top surface 1121 is provided with an electrical connection member 13 c. The electrical connector 13c is electrically connected to the tab 118.

The battery 10c of the present application will be specifically described below 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 packaging bag 111. The packaging bag 111 includes a main body 112a, a top seal 113a, and two side seals 114a arranged to face each other.

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 example 3.1, the main body 112a has a substantially rectangular parallelepiped structure. In other embodiments, the main body 112a has a columnar isotactic structure or other irregular structure.

Referring to fig. 37, the top seal portion 113a extends from the top surface 1121. Each side seal 114a extends from the side 1123 and extends outward in the lengthwise direction of the cell 10c to connect to the top seal 113 a.

In example 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 along the connecting edge 116 of the side seal 114a that intersects the body portion 112a toward the side surface 1123. The top seal portion 113a and the intersection portion of the side seal portion 114a and the top seal portion 113a are folded toward the top surface 1121, and the projection of the top seal portion 113a in the longitudinal direction of the battery 10c is entirely located within the range of the top surface 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 two electrode lugs 118. The electrode assembly 117 is housed in the body portion 112 a. The tabs 118 are electrically connected to the electrode assembly 117 and extend from the top seal portion 113 a.

The battery cell 11 further includes an electrolyte (not shown). The electrolyte is contained in the body portion 112 a.

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

Illustratively, referring to fig. 37 and 40, the electrode assembly 117 includes a positive electrode tab 1171, a separation film 1172, and a negative electrode tab 1173. The positive electrode tab 1171, the separation film 1172, and the negative electrode tab 1173 are wound or laminated to form the electrode assembly 117. One of the tabs 118 is electrically connected to the positive electrode plate 1171, and the other tab 118 is electrically connected to the negative electrode plate 1173.

The battery 10c also includes a circuit board 12. Two electrical connectors 13c are disposed on the surface of the circuit board 12 opposite to the top surface 1121. 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

Embodiment 3.2 differs from embodiment 3.1 in the shape of the first indentation 115.

In example 3.2, with reference to fig. 42, the first indentation 115 is triangular.

Example 3.3

Embodiment 3.3 differs from embodiment 3.1 in the shape of the first indentation 115.

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

Example 3.4

Example 3.4 differs from example 3.1 in the first side seal 114 a.

In example 3.4, with reference to fig. 44, the side seals 114a comprise corner portions 1141 adjacent to the first notches 115. The angular portion 1141 has a second notch 1142.

In embodiment 3.4, the second notch 1142 is triangular.

In other embodiments, the second missing portion 1142 is not limited to being in the regular shape of arc, trapezoid, rectangle, etc. or other irregular shape.

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

Example 3.5

Example 3.5 differs from example 3.1 in the first side seal 114 a.

In example 3.5, with reference to fig. 45, the side seal 114a comprises a corner portion 1141 adjacent to the first notch 115. The angular portion 1141 is folded toward the top seal portion 113 a.

In embodiment 3.5, by folding the corner portions 1141, the problem of wasted space in the length direction of the battery 10c due to the overlapping arrangement of the corner portions 1141 of the side seal portion 114a and the circuit board 12 is avoided, so that the space utilization rate of the battery 10c in the length direction is improved, and the battery capacity is improved.

Referring to fig. 23, the present embodiment further provides an electronic device 100 c. 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, or the like.

Referring to fig. 46, the present application also discloses a battery 10 d. The battery 10d includes a cell 11 and a circuit board 12 electrically connected to the cell 11. Referring to fig. 47 and fig. 48, the battery cell 11 includes a packaging bag 111. The packaging bag 111 includes a main body 112a and a top seal 113 a. The main body 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 seal portion 113a includes a first seal portion 1131 and a second seal portion 1132 which are oppositely arranged, and a third seal portion 1133 connected between the first seal portion 1131 and the second seal portion 1132. The first and second seals 1131 and 1132 are folded toward the third seal 1133, respectively. 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. 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 first sealing portion 1131, the second sealing portion 1132, and the reinforcing plate 127 do not overlap in projection on the plane of the top surface of the battery 10 d.

Referring to fig. 47, the length 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.

Through changing in this application the structure of stiffening plate 127, with first sealing 1131 with the cooperation of second sealing 1132 is avoided first sealing 1131 with second sealing 1132 with the overlapping of circuit board 12 sets up, and the extravagant problem in the space of battery 10d on length direction (being X axle direction) that leads to has improved battery 10d is at the ascending space utilization of length direction to reach the mesh that promotes battery capacity.

Further, referring to fig. 46, the surface of the circuit board 12 opposite to the battery cell 11 is provided with an electrical connection member 121 a. The electrical connector 121a is electrically connected to the battery cell 11.

The battery 10d of the present application will be specifically described below 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 packaging bag 111. The packaging bag 111 includes a main body 112a and a top seal 113 a. 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 4.1, the main body 112a has a rectangular parallelepiped structure. In other embodiments, the main body 112a may have a columnar structure, or the like, instead of a rectangular parallelepiped structure.

Referring to fig. 47 and 48, the top seal 113a extends from the top surface 1121 and is folded toward the top surface 1121. The top seal portion 113a includes a first seal portion 1131 and a second seal portion 1132 which are oppositely arranged, and a third seal portion 1133 connected between the first seal portion 1131 and the second seal portion 1132. The first and second seals 1131 and 1132 are folded toward the third seal 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 formed by a portion of the third sealing portion 1133 and a portion of the top surface 1121. The flexible circuit board 126 includes a first end portion 1261 facing the first seal 1131 and a second end portion 1262 facing the second seal 1132. In the width direction (i.e., the Z-axis direction) of the battery 10d, the first end portion 1261 protrudes from 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 received in the first receiving space 1263, and a part of the second sealing portion 1132 is received in the second receiving 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 surface 1121 of the cell 10d do not overlap.

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

Through in this application the stiffening plate 127 is relative flexible circuit board 126 contracts inwards, does first sealing 1131 with second sealing 1132 creates and accepts first accommodation space 1263 of first sealing 1131 and accepts second accommodation space 1264 of second sealing 1132, so improved greatly battery 10d is at the ascending space utilization of length direction to play the purpose that promotes battery capacity.

In example 4.1, referring to fig. 47 and 48, the package 111 further includes two oppositely disposed side seals 114 a. The two side seals 114a extend from the side surface 1123 and are respectively connected to the first seal 1131 and the second seal 1132. The two side seals 114a are folded toward the side surfaces 1123, respectively. In some embodiments, at least one of the side seals 114a may be omitted.

Further, referring to fig. 46, 47 and 49, the surface of the flexible circuit board 126 facing away from the reinforcing plate 127 is provided with two electrical connection members 121 a. The battery cell 11 further includes a first tab 115a and a second tab 116a having a different polarity from 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 housed in the main body portion 112 a.

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

Illustratively, the electrode assembly includes a positive electrode tab, a separator, and a negative electrode tab. The positive electrode tab, the separator and the negative electrode tab are wound or laminated to form the electrode assembly. The first tab 115a is electrically connected to the positive plate, and the second tab 116a is electrically connected to the negative 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. The external connector 128 is a terminal wire, a gold finger, or a connector.

Referring to fig. 51, the present embodiment also discloses a battery 20 a. 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 together, the battery cell 11 includes a packaging bag 111. The packaging bag 111 includes a main body 112a and a top seal 113 a. The main body 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 seal portion 113a includes a first seal portion 1131 and a second seal portion 1132 which are oppositely arranged, and a third seal portion 1133 connected between the first seal portion 1131 and the second seal portion 1132. The first and second seals 1131 and 1132 are folded toward the third seal 1133, respectively. 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. 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).

Through in this application first sealing 1131, second sealing 1132 with the non-overlapping design of the planar projection of top surface 1121 of circuit board 12 avoids first sealing 1131 with second sealing 1132 with the overlapping setting of circuit board 12, and the extravagant problem in the space of battery 20a that leads to on length direction (being X axle direction), has improved the space utilization of battery 10d on length direction, and then reach the purpose that promotes battery capacity.

Further, referring to fig. 56, the surface of the circuit board 12 opposite to the battery cell 11 is provided with an electrical connection member 121 a. The electrical connector 121a is electrically connected to the battery cell 11.

The battery 20a in the present application will be specifically described below by way of example.

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 together, the battery cell 11 includes a packaging bag 111. The packaging bag 111 includes a main body 112a and a top seal 113 a. 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 example 4.2, the main body 112a has a rectangular parallelepiped structure. In other embodiments, the main body 112a may have a columnar structure, or the like, instead of a rectangular parallelepiped structure.

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 seal portion 113a includes a first seal portion 1131 and a second seal portion 1132 which are oppositely arranged, and a third seal portion 1133 connected between the first seal portion 1131 and the second seal portion 1132. The first and second seals 1131 and 1132 are folded toward the third seal 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 defines a first notch 1134 opposite to the circuit board 12, and the second sealing portion 1132 defines 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.

With reference to fig. 51, 52, and 53, in the present application, by providing the first sealing portion 1131 with the first notch 1134 opposite to the circuit board 12, and providing the second sealing portion 1132 with the second notch 1135 opposite to the circuit board 12, the problem of space waste of the battery 20a in the length direction due to the overlapping arrangement of the first sealing portion 1131 and the second sealing portion 1132 with 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 example 4.2, referring to fig. 52, the package 111 further includes two oppositely disposed side seals 114 a. The two side seals 114a extend from the side surface 1123 and are respectively connected to the first seal 1131 and the second seal 1132. The two side seals 114a are folded toward the side surfaces 1123, respectively. In some embodiments, at least one of the side seals 114a may be omitted.

Further, referring to fig. 51, 52 and 53, the surface of the circuit board 12 facing away from the battery cell 11 is provided with two electrical connectors 121 a. The battery cell 11 further includes a first tab 115a and a second tab 116a having a different polarity from 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 housed in the main body portion 112 a.

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

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

Example 4.3

Embodiment 4.3 differs from embodiment 4.2 in the structure of the first seal portion 1131 and the second seal portion 1132. That is, the first gap 1134 of example 4.2 is not formed in the first seal portion 1131 of example 4.3, and the second gap 1135 of example 4.2 is not formed in the second seal portion 1132 of example 4.3.

In embodiment 4.3, referring to fig. 54, the first sealing portion 1131 includes a first angle portion 1136 opposite to the circuit board 12. The second sealing portion 1132 includes a second corner portion 1137 opposite the circuit board 12. A first fold 1138 is disposed on the first corner portion 1136, and a second fold 1139 is disposed on the second corner portion 1137. The first corner portion 1136 is folded along the first fold 1138, and the second corner portion 1137 is folded along the second fold 1139, at this time, 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 the present 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 due to the overlapping arrangement of 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 increasing the battery capacity is further 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 packaging bag 111. The packaging bag 111 includes a main body 112a and a top seal 113 a. 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 example 4.4, the main body 112a has a rectangular parallelepiped structure. In other embodiments, the main body 112a may have a columnar structure, or the like, instead of a rectangular parallelepiped structure.

Referring to fig. 47 and 48, the top seal 113a extends from the top surface 1121 and is folded toward the top surface 1121. The top seal portion 113a includes a first seal portion 1131 and a second seal portion 1132 which are oppositely arranged, and a third seal portion 1133 connected between the first seal portion 1131 and the second seal portion 1132. The first and second seals 1131 and 1132 are folded toward the third seal 1133, respectively.

Referring to fig. 47 and 55, 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 4.4, 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 surface 122a is provided with a third notch 1221, and the second side surface 123a is provided with a fourth notch 1231. A portion of the first sealing portion 1131 is correspondingly received in the third gap 1221, and a portion of the second sealing portion 1132 is correspondingly received in the fourth gap 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 the present application, a clearance design is made in an overlapping area between the circuit board 12 and the first sealing portion 1131 and the second sealing portion 1132 (that is, a design of opening the first notch 1134 and the second notch 1135 on the circuit board 12), so as to avoid the problem of space waste of the battery 20a in the length direction due to the overlapping arrangement of the first sealing portion 1131 and the second sealing portion 1132 with the circuit board 12, 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 gap 1221 is triangular and the fourth gap 1231 is triangular.

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

In other embodiments, the third gap 1221 has a semi-circular shape, a hexagonal shape, or an octagonal shape, and the fourth gap 1231 has a semi-circular shape, a hexagonal shape, or an octagonal shape.

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

Further, referring to fig. 47 and 55, the surface of the circuit board 12 facing away from the battery cell 11 is provided with two electrical connectors 121 a. The battery cell 11 further includes a first tab 115a and a second tab 116a having a different polarity from 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 housed in the main body portion 112 a.

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

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

Example 4.5

Referring to fig. 57, the difference between embodiment 4.5 and embodiment 4.4 is that the third notch 1221 of embodiment 4.5 is opened at the connection point of the third side 124a and the first side 122a, and the fourth notch 1231 of embodiment 4.5 is opened at the connection point of 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 gap 1221 is arcuate and the fourth gap 1231 is arcuate.

In other embodiments, the third gap 1221 has a semi-circular shape, a hexagonal shape, or an octagonal shape, and the fourth gap 1231 has a semi-circular shape, a hexagonal shape, or an octagonal shape.

Referring to fig. 59, the embodiment of the present application further provides an electronic device 100 d. 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, or the like.

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

Claims (35)

1. A battery assembly, comprising:

   a cell main body;

   it is characterized in that the preparation method is characterized in that,

   the battery assembly further includes:

   an encapsulation film, comprising:

   a main body portion covering the 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 oppositely, 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 direction of the first surface;

   the side sealing edge is arranged on the side wall and extends towards the direction of the second surface;

   the tab comprises a first end and a second end which are opposite to each other, the first end is connected with the battery cell main body, and the second end is positioned outside the packaging film; and

   and the lead and/or the flexible circuit board are/is welded with the second end.
2. The battery assembly of claim 1, wherein the top seal edge is positioned between the first surface and the second surface.
3. The battery assembly of claim 1 or 2, wherein the side seal is positioned between the first surface and the second surface.
4. The battery assembly of claim 1 wherein the tab is located between the first surface and the second surface.
5. The battery module according to claim 1, wherein the tab is electrically connected to the lead wire and/or the tab is electrically connected to the flexible circuit board through a protective plate.
6. An electronic device comprising the battery pack according to any one of claims 1 to 5.
7. A battery comprises a battery core and a circuit board, wherein the battery core comprises a packaging bag and a lug, the packaging bag comprises a main body part and a top sealing edge, the main body part comprises a top surface, the top sealing edge extends out of the top surface, and the top sealing edge is bent towards the main body part and covers part of the top surface; the tab extends out of the top seal edge; the circuit board is arranged on the top surface; it is characterized in that the preparation method is characterized in that,

   the circuit board is provided with a clearance groove corresponding to the position of the lug, the lug bends towards the direction of the clearance groove and is electrically connected with the circuit board.
8. The battery of claim 7, wherein the circuit board includes a lower surface facing the top surface and an upper surface facing away from the top surface; the empty avoiding groove penetrates through the upper surface and the lower surface, and the lug is electrically connected with the circuit board on the upper surface.
9. The battery of claim 7 wherein a projection of said tab on said top surface is entirely within said top surface.
10. The battery of claim 8, wherein the battery core comprises two tabs, and the circuit board is provided with a clearance groove corresponding to each tab.
11. The battery of claim 10, wherein the two clearance grooves communicate with each other.
12. The battery of claim 10 or 11, wherein a first sealing element and a second sealing element are disposed in the top edge seal, the first sealing element is configured to isolate the top edge seal from one of the tabs, the second sealing element is configured to isolate the top edge seal from the other of the tabs, the first sealing element is located in one of the clearance grooves, the second sealing element is located in the other of the clearance grooves, and projections of the first sealing element, the second sealing element and the circuit board on the top surface do not overlap.
13. A battery pack comprises a circuit board and a plurality of horizontally arranged battery cells, wherein each battery cell comprises a packaging bag and a tab, the packaging bag comprises a main body part and a top sealing edge, the main body part comprises a top surface, the top sealing edge extends out of the top surface, and the top sealing edge is bent towards the main body part and covers part of the top surface; the lug extends out of the top sealing edge; the circuit board is arranged on the surface formed by the top surfaces of the plurality of horizontally arranged battery cores; it is characterized in that the preparation method is characterized in that,

    and the circuit board is provided with a clearance groove corresponding to the position of each tab of the battery cell, and the tabs are bent towards the direction of the clearance grooves and are electrically connected with the circuit board.
14. The battery of claim 13, wherein a projection of the tab on each cell onto a top surface of the cell on which it is located is entirely within the top surface.
15. An electronic device, characterized in that the electronic device comprises a battery according to any of claims 7-12.
16. A battery comprises an electric core and a tab electrically connected with the electric core, wherein the electric 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, and the tab extends out of the top sealing part;

    it is characterized in that the preparation method is characterized in that,

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

    the extension portion comprises two corner portions which are respectively located on two sides of the lug, and notch structures are arranged on the corner portions.
17. The battery of claim 16, wherein the extension forms the notch structure by cutting the corner portion or by folding the corner portion.
18. The battery of claim 16, wherein the intersection of the notch structure and the extension is an arc, a diagonal, or a plurality of segments.
19. The battery of claim 16, 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 connecting 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.
20. The battery of claim 19 wherein a distance D from a point C where the tab and the extension meet to the point B is 0.1mm to 1 mm.
21. The battery of claim 16, wherein the top seal portion comprises two oppositely disposed first and second seal portions and a third seal portion connected between the first and second seal portions, the first and second seal portions being folded toward the third seal portion, respectively, the third seal portion being folded toward the top surface, the built-in portion being located within the third seal portion.
22. The battery of claim 21 further comprising a circuit board electrically connected to said tabs, said circuit board being disposed on a surface defined by a portion of said top surface and a portion of said top seal.
23. The battery of claim 22, wherein the circuit board comprises a flexible circuit board and a stiffener disposed on the flexible circuit board and facing the top surface, the stiffener is disposed on a surface formed by a portion of the third sealing portion and a portion of the top surface, the stiffener comprises a first surface facing the first sealing portion and a second surface facing the second sealing portion, the first surface is recessed inward to form a first receiving space, the second surface is recessed inward to form a second receiving space, a portion of the first sealing portion is received in the first receiving space, and a portion of the second sealing portion is received in the second receiving space.
24. An electronic device, characterized in that the electronic device comprises a battery according to any one of claims 16 to 23.
25. A battery comprises an electric core, wherein the electric 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 back to the top surface and a side surface connected between the top surface and the bottom surface, and the top sealing part extends out of 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;

    it is characterized in that the preparation method is characterized in that,

    a first notch part is arranged at the intersection of the top sealing part and the side sealing part, and the side sealing part is folded towards the side surface along the connecting edge of the intersection 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 entirely positioned in the range of the top surface.
26. The battery of claim 25, wherein the side seal includes a corner portion adjacent the first cutout, the corner portion being folded toward the top seal.
27. The battery of claim 25, wherein the side seal includes a corner portion adjacent the first notch, the corner portion having a second notch formed therein.
28. The battery of claim 25, wherein the cell further comprises an electrode assembly housed in the body portion and a tab electrically connected to the electrode assembly and extending from the top seal portion.
29. An electronic device, characterized in that the electronic device comprises a battery according to any one of claims 25 to 28.
30. A 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 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;

    it is characterized in that the preparation method is characterized in that,

    the projection of the first sealing part and the second sealing part on the plane of the top surface does not overlap with the projection of the circuit board or the reinforcement area in the circuit board on the plane of the top surface.
31. The battery of claim 30, wherein the first seal portion includes a first corner portion opposite the circuit board, wherein the second seal portion includes a second corner portion opposite the circuit board, wherein the first corner portion has a first fold and the second corner portion has a second fold, wherein the first corner portion is folded along the first fold and the second corner portion is folded along the second fold.
32. The battery of claim 30, wherein the first sealing portion defines a first notch opposite the circuit board, and the second sealing portion defines a second notch opposite the circuit board.
33. The battery of claim 30, wherein the circuit board comprises 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 gap is formed in the first side surface, a fourth gap is formed in the second side surface, part of the first sealing portion is correspondingly accommodated in the third gap, and part of the second sealing portion is correspondingly accommodated in the fourth gap;

    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.
34. The battery according to claim 30, wherein the circuit board includes a flexible circuit board and a reinforcing plate provided on a side of the flexible circuit board toward the top surface, the area corresponding to the reinforcing plate is a reinforcing area of the circuit board, the reinforcing plate is arranged on the surface formed by part of the third sealing part and part of the top surface, the flexible circuit board includes a first end portion facing the first sealing part and a second end portion facing the second sealing part, wherein the first end portion protrudes relative to the reinforcing plate in a width direction of the battery, so as to form a first accommodating space together with the reinforcing plate, the second end part protrudes relative to the reinforcing plate, so as to form a second accommodating space together with the reinforcing plate, part of the first sealing part is accommodated in the first accommodating space, and part of the second sealing part is accommodated in the second accommodating space.
35. An electronic device, characterized in that the electronic device comprises a battery according to any one of claims 30 to 34.

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