CN111785861A

CN111785861A - Battery cell, battery and electronic device

Info

Publication number: CN111785861A
Application number: CN202010664357.5A
Authority: CN
Inventors: 黄小钊
Original assignee: Dongguan Nvt Technology Co Ltd
Current assignee: Dongguan Nvt Technology Co Ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2020-10-16

Abstract

The application provides a battery cell, which comprises a packaging bag. The packaging bag comprises a main body part, a top sealing part and a side sealing part. The main body part comprises a top surface, a bottom surface and a side surface. The top seal part extends out of the top surface. The side seal part extends out of the side face and is connected with the top seal part. And the side seal part is provided with a crease. The crease extends from the bottom surface toward the top surface. The fold separates the side seal portion into a first section and a second section. The second section is connected to the first section, the side, and the overseal. The first branch part is provided with a first notch. The first section is folded to the second section along the fold. The first and second sections folded together are folded towards the side. The top seal portion and a portion of the second section connected to the top seal portion are folded towards the top surface. The application also provides a battery with the battery core and an electronic device with the battery.

Description

Battery cell, battery and electronic device

Technical Field

The application relates to a battery cell, a battery with the battery cell and an electronic device with the battery.

Background

In the packaging process of a general battery, the top sealing edge of the battery cell and part of side sealing edges connected with the top sealing edge are folded towards the top surface of the battery cell, and the circuit board is arranged on the top surface of the battery cell, so that the packaging space of the battery in the length direction is reduced, and the battery capacity is improved. However, when the above-mentioned packaging method is applied to a double-folded battery (i.e. a battery with the side edge being folded twice), since the side edge is folded twice, the original single-layer structure of the side edge is changed into a double-layer structure, so that the side edge connected with the top edge is not easily folded toward the top surface and is easily rebounded, which causes the damage to the aluminum-plastic film. In addition, the side sealing edge of the double-layer structure is folded on the top surface of the battery core, so that the waste of battery space is caused, and the battery capacity is influenced.

Disclosure of Invention

In view of the above, it is desirable to provide a battery cell to solve the above problems.

The application provides a battery with the battery core and an electronic device with the battery.

A battery cell comprises a packaging bag, wherein the packaging bag comprises a main body part, a top sealing part and a side sealing part, the main body part comprises a top surface, a bottom surface and a side surface, the bottom surface faces back to the top surface, the side surface is connected between the top surface and the bottom surface, the top sealing part extends out of the top surface, the side sealing part extends out of the side surface and is connected with the top sealing part, a crease is arranged on the side sealing part, the crease extends from the bottom surface to the top surface, the side sealing part is divided into a first subsection and a second subsection by the crease, and the second subsection is connected with the first subsection, the side surface and the top sealing part;

the first section is provided with a first notch, the first section is folded on the second section along the crease, the first section and the second section which are folded together are folded towards the side surface, and the top seal part and the part connected with the top seal part are folded towards the top surface.

Optionally, the projection of the first section onto the side surface is entirely within the side surface.

Optionally, the first notch is rectangular, circular arc or triangular.

Optionally, a second notch is formed at a joint of the second subsection and the top seal part, and a projection of the top seal part and a connection part folded towards the top surface of the second subsection are all located in the top surface.

Optionally, the second notch is rectangular, circular arc or triangular.

Optionally, the packaging bag comprises two side seal portions, and the two side seal portions are arranged oppositely.

A battery comprises a circuit board and the battery cell, wherein the circuit board is arranged on the top surface and comprises a lug, and the lug extends out of the top sealing part and is electrically connected with the circuit board.

Optionally, the second part is provided with a third notch, and the circuit board and the projection of the second part folded towards the top surface on the top surface do not overlap.

Optionally, the second sub-portion includes a connecting portion and an angle portion adjacent to the first notch, the connecting portion is connected to the angle portion, the first sub-portion, the side surface and the top sealing portion, the angle portion is folded toward the connecting portion, and a projection of the circuit board and a portion of the second sub-portion folded toward the top surface on the top surface do not overlap.

An electronic device comprises the battery.

Compare in current battery structure, electric core in this application in set up first breach in the first subsection, avoided the court the folding second subsection of top surface sets up with overlapping of first subsection to solved the court the folding side seal of top surface is difficult for folding and easy bounce-back, causes the damaged problem of wrapping bag, has still improved in addition electric core space utilization on length direction has promoted battery capacity.

Drawings

Fig. 1 is a schematic structural diagram of a battery cell according to an embodiment of the present application.

Fig. 2 is an expanded schematic view of the battery cell shown in fig. 1.

Figure 3 is a schematic view of the first section of figure 1 folded.

Fig. 4 is a schematic view of the first section of fig. 3 folded over the second section.

Figure 5 is a schematic view of the first and second sections folded together in figure 4, folded sideways.

Fig. 6 is a schematic view of an electrode assembly according to an embodiment of the present application.

Fig. 7 is a schematic structural diagram of a battery according to an embodiment of the present application.

Fig. 8 is an expanded schematic view of a battery cell according to another embodiment of the present application.

Fig. 9 is an expanded schematic view of a battery cell according to another embodiment of the present application.

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

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

Fig. 12 is a schematic structural view of a battery according to another embodiment of the present application.

Fig. 13 is an expanded schematic view of a battery cell according to another embodiment of the present application.

Fig. 14 is a block diagram of an electronic device according to an embodiment of the present application.

Description of the main elements

Electronic device 1

Battery 10

Battery cell 11

Packaging bag 111

Main body 112

Top surface 1121

Bottom 1122

Side 1123

Tip seal 113

Side seal 114

Crease 1141

First subsection 1142

Second subsection 1143

First notch 1144

Third notch 1145

Connecting part 1146

Angular position portion 1147

Second notch 115

Tab 116

Electrode assembly 117

First pole piece 1171

Isolation diaphragm 1172

Second pole piece 1173

Circuit board 12

Electrical connector 121

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

Detailed Description

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

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

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

Referring to fig. 1, an embodiment of the present application discloses a battery cell 11. Referring to fig. 2, fig. 3, fig. 4 and fig. 5, the battery cell 11 includes a packaging bag 111. The packaging bag 111 includes a main body 112, a top seal 113, and a side seal 114. The main body 112 includes a top surface 1121, a bottom surface 1122, and a side surface 1123. The bottom surface 1122 faces away from the top surface 1121. The side surface 1123 is connected between the top surface 1121 and the bottom surface 1122. The top seal 113 extends from the top surface 1121. The side seal 114 extends from the side 1123 and is connected to the top seal 113. The side seal 114 is provided with a crease 1141. The fold 1141 extends from the bottom surface 1122 toward the top surface 1121. The fold 1141 separates the side seal 114 into a first section 1142 and a second section 1143. The second section 1143 is connected to the first section 1142, the side surface 1123 and the top seal 113. The first sub-portion 1142 defines a first notch 1144. The first section 1142 is folded along the fold 1141 to the second section 1143. The first and

second sections

1142 and 1143 folded together are folded toward the side 1123. The top seal portion 113 and a portion of the second section 1143 connected to the top seal portion 113 are folded toward the top surface 1121.

Compare in current battery structure, electric core 11 in set up first breach 1144 on the first subdivision 1142, avoided the court the overlapping setting of the folding second subdivision 1143 of top surface 1121 and first subdivision 1142 to solved the court the folding side seal 114 of top surface 1121 is difficult for folding and rebounds easily, causes the damaged problem of wrapping bag 111, has still improved in addition electric core 11 is at length direction (X axle direction) space utilization, has promoted electric core 11's capacity.

Wherein the projection of the first section 1142 on the side surface 1123 is entirely located within the side surface 1123.

The first notch 1144 is not limited to regular shapes such as rectangular, circular arc, and triangular, or other irregular shapes.

In some embodiments, referring to fig. 9, a second notch 115 is formed at the connection between the second section 1143 and the overseal 113. The top seal 113 and the projection of the second portion 1143 folded toward the top surface 1121 are all located within the top surface 1121. The second notch 115 is not limited to be in the regular shape of rectangle, circular arc, triangle, etc., or other irregular shapes.

Electric core 11 in this application through in second subdivision 1143 with second breach 115 has been seted up to top seal 113's junction, and top seal 113 and side seal 114 of avoiding folding are relative battery 10 protrusion has thereby improved battery 10's space utilization has promoted electric core 11's capacity.

In some embodiments, the package 111 includes two side seals 114. The two side seals 114 are disposed opposite to each other.

Referring to fig. 7, the present embodiment also discloses a battery 10. Referring to fig. 1, the battery 10 includes a circuit board 12 and the battery cell 11. The circuit board 12 is disposed on the top surface 1121. The battery cell 11 further comprises a tab 116. The tab 116 extends from the top seal portion 113 and is electrically connected to the circuit board 12.

In some embodiments, referring to fig. 10, 11 and 12, the second section 1143 defines a third gap 1145. The circuit board 12 and the portion of the second section 1143 folded toward the top surface 1121 do not overlap in projection on the top surface 1121.

The third notch 1145 is not limited to be in regular shapes such as rectangle, circular arc and triangle, or other irregular shapes.

In other embodiments, referring to fig. 13, the second section 1143 includes a connecting portion 1146 and an angular portion 1147 adjacent to the first notch 1144. The connecting portion 1146 is connected to the corner portion 1147, the first sub-portion 1142, the side surface 1123 and the top seal portion 113. The corner portion 1147 is folded toward the connecting portion 1146. Wherein, the circuit board 12 and the portion of the second section 1143 folded toward the top surface 1121 do not overlap in projection on the top surface 1121.

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

Example 1

Referring to fig. 7, a battery 10 includes a cell 11 and a circuit board 12.

Referring to fig. 1 and 2, the battery cell 11 includes a packaging bag 111. The package bag 111 includes a main body 112, a top seal 113, and two side seals 114 disposed opposite to each other.

Referring to fig. 2, the main body 112 includes a top surface 1121, a bottom surface 1122, and a side surface 1123. The bottom surface 1122 faces away from the top surface 1121. The side surface 1123 is connected between the top surface 1121 and the bottom surface 1122. In embodiment 1, the main body 112 has a rectangular parallelepiped structure. In other embodiments, the body portion 112 has a columnar isotactic structure or other irregular structure.

Referring to fig. 2, the top seal 113 extends from the top surface 1121. Each side seal 114 extends from the side 1123 and is connected to the top seal 113.

In example 1, referring to fig. 2, the side seal 114 extends from the side surface 1123 and outwardly in the longitudinal direction (i.e., X-axis direction) of the battery 10 to achieve connection with the top seal 113.

Referring to fig. 2, 3, 4 and 5, the side seal 114 is provided with a fold 1141. The fold 1141 extends from the bottom surface 1122 toward the top surface 1121. The fold 1141 separates the side seal 114 into a first section 1142 and a second section 1143. The second section 1143 is connected to the first section 1142, the side surface 1123 and the top seal 113. The first sub-portion 1142 defines a first notch 1144. The first section 1142 is folded along the fold 1141 to the second section 1143. The first and

second sections

In embodiment 1, referring to fig. 2, the first notch 1144 has a rectangular shape.

Referring to fig. 2 and 6, the battery cell 11 further includes an electrode assembly 117 and two electrode lugs 116. The electrode assembly 117 is housed in the body portion 112. The tabs 116 are electrically connected to the electrode assembly 117 and extend from the inside of the top seal portion 113.

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

Illustratively, referring to fig. 2 and 6, the electrode assembly 117 includes a first pole piece 1171, a separator 1172, and a second pole piece 1173. The first pole piece 1171, the separator 1172, and the second pole piece 1173 are wound or laminated to form the electrode assembly 117. One tab 116 is electrically connected to the first pole piece 1171, and the other tab 116 is electrically connected to the second pole piece 1173.

Referring to fig. 1 and 7, the circuit board 12 is disposed on the top surface 1121. Two electrical connectors 121 are disposed on a surface of the circuit board 12 opposite to the top surface 1121. The two electrical connectors 121 are electrically connected to the corresponding tabs 116.

Example 2

Embodiment 2 differs from embodiment 1 in the shape of the first notch 1144.

In embodiment 2, referring to fig. 8, the first notch 1144 is circular.

Example 3

The difference between embodiment 3 and embodiment 2 is that, referring to fig. 9, a second notch 115 is formed at the joint of the second sub-portion 1143 and the top seal portion 113 in embodiment 3. The top seal 113 and the projection of the second portion 1143 folded toward the top surface 1121 are all located within the top surface 1121.

Example 4

Embodiment 4 differs from embodiment 2 in the second section 1143.

In embodiment 4, referring to fig. 10, 11 and 12, the second section 1143 is opened with a third notch 1145. Wherein, the circuit board 12 and the portion of the second section 1143 folded toward the top surface 1121 do not overlap in projection on the top surface 1121.

In embodiment 4, the third notch 1145 is formed in the second sub-portion 1143, so that the problem of space waste of the battery 10 in the length direction due to the overlapping arrangement of the second sub-portion 1143 and the circuit board 12 is avoided, the space utilization rate of the battery 10 in the length direction is improved, and the battery capacity is improved.

Example 5

Embodiment 5 differs from embodiment 2 in the second section 1143.

In embodiment 5, referring to fig. 13, the second portion 1143 includes a connecting portion 1146 and an angular portion 1147 adjacent to the first notch 1144. The connecting portion 1146 is connected to the corner portion 1147, the first sub-portion 1142, the side surface 1123 and the top seal portion 113. The corner portion 1147 is folded toward the connecting portion 1146. Wherein, the circuit board 12 and the portion of the second section 1143 folded toward the top surface 1121 do not overlap in projection on the top surface 1121.

In embodiment 5, by folding the corner portions 1147, the problem of space waste of the battery 10 in the length direction due to the overlapping arrangement of the corner portions 1147 of the second sub-portions 1143 and the circuit board 12 is avoided, so that the space utilization rate of the battery 10 in the length direction is improved, and the battery capacity is improved.

Referring to fig. 14, the present application further provides an electronic device 1. The electronic device 1 includes the battery 10 described above.

The electronic device 1 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.

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

Claims

1. A battery cell comprises a packaging bag, wherein the packaging bag comprises a main body part, a top sealing part and a side sealing part, the main body part comprises a top surface, a bottom surface and a side surface, the bottom surface faces back to the top surface, the side surface is connected between the top surface and the bottom surface, the top sealing part extends out of the top surface, the side sealing part extends out of the side surface and is connected with the top sealing part, a crease is arranged on the side sealing part, the crease extends from the bottom surface to the top surface, the side sealing part is divided into a first subsection and a second subsection by the crease, and the second subsection is connected with the first subsection, the side surface and the top sealing part;

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

2. The cell of claim 1, wherein a projection of the first subsection onto the side surface lies entirely within the side surface.

3. The electrical core of claim 1, wherein the first notch is rectangular, circular arc, or triangular.

4. The battery cell of claim 1, wherein a second notch is formed at a joint of the second subsection and the top seal, and a projection of the top seal and a part of the second subsection folded toward the top surface are all located in the top surface.

5. The electrical core of claim 4, wherein the second notch is rectangular, circular arc, or triangular.

6. The electrical core of any of claims 1 to 5, wherein the packaging bag comprises two side seals, the two side seals being disposed opposite one another.

7. A battery comprising a circuit board and the cell of any of claims 1-6, wherein the circuit board is disposed on the top surface, and the cell comprises a tab extending from the top seal portion and electrically connected to the circuit board.

8. The battery of claim 7, wherein the second section defines a third gap, and wherein the circuit board does not overlap with a projection of the second section onto the top surface that is folded toward the top surface.

9. The battery of claim 7, wherein the second section includes a connection portion and an angled portion adjacent to the first notch, the connection portion connects to the angled portion, the first section, the side surface and the top seal portion, the angled portion is folded toward the connection portion, and a projection of the circuit board and a portion of the second section folded toward the top surface do not overlap at the top surface.

10. An electronic device, characterized in that the electronic device comprises a battery according to any of claims 7-9.