Soft package battery structure with top sealing edge easy to bend

Abstract

The invention provides an easy-to-bend soft package battery structure with a top sealing edge, which comprises a battery cell main body, side sealing edge areas on the two sides of the battery cell main body, a top sealing edge area on the top, a top sealing inner unsealed area, a top sealing sealing area, a top sealing outer unsealed area, a tab and an exposed tab adhesive, and is characterized in that the width of the top sealing inner unsealed area is set to be 0.5-5mm; a sealing area is formed at the junction of an inner unsealed area of a top seal and an inner unsealed area of a side seal through heat sealing, then a notch is cut at the junction of the sealing area of the top seal and the sealing area of the side seal, a tab at the top seal end, exposed PP glue and a top seal edge area are bent twice or multiple times, finally, a top edge L-shaped or top edge side U-shaped edge folding structure and a new battery structure are formed, the length of the battery is reduced, and the production efficiency of the battery is improved. The space utilization rate of the battery structure is improved.

Description

Technical Field

[0001] This invention relates to the field of pouch batteries, and more particularly to a pouch battery structure with a top-sealed, easily bendable edge. Background Technology

[0002] With the commercialization of lithium-ion cells, the market demand for higher energy density has never stopped. How to improve the energy density of lithium-ion batteries has always been a constant pursuit of technical personnel.

[0003] To ensure good sealing performance of pouch lithium-ion cells, the cells must have a sufficiently wide seal, including both the top seal and the side seal.

[0004] like Figure 1 As shown in the schematic diagram of a traditional pouch battery structure, the top seal of the pouch battery consists of an unsealed area 3-1 inside the top seal, a sealed area 3-2 inside the top seal, an unsealed area 3-3 outside the top seal, exposed PP adhesive 6, and tabs 7. The side seal consists of an unsealed area 2-1 inside the side seal and a sealed area 2-2 inside the side seal. The function of the top seal area 3-2 and the side seal area 2-2 is to seal, ensuring that the electrolyte inside the pouch battery does not leak out and that outside air does not enter the cell. This sealed area needs to have a certain width to ensure battery reliability. The main functions of the unsealed area 3-1 and the unsealed area 2-1 inside the side seal are to prevent the accumulation of excess adhesive and reduce the probability of cell corrosion. The function of the unsealed area 3-3 outside the top seal is to prevent excess adhesive from accumulating and overflowing after sealing. The function of the exposed PP adhesive 6 is to prevent the cell tab 7 from contacting the aluminum layer of the aluminum-plastic film, which would lead to cell corrosion. The width of the unsealed area 3-1 inside the top seal, the sealing area 3-2 inside the top seal, the unsealed area 3-3 outside the top seal, and the exposed PP adhesive 6 all have their own functions and require a certain width. The narrower the total width, the more helpful it is for improving the energy density of the battery.

[0005] The current design limits the minimum width of the unsealed area 3-1 inside the top seal to 0.5mm, the minimum width of the unsealed area 3-2 outside the top seal to 1mm, the width of the unsealed area 3-3 outside the top seal to 0.5mm, and the width of the exposed PP adhesive 6 to 2mm. The total minimum width of the unsealed area 3-1 inside the top seal, the top seal sealing area 3-2, the unsealed area 3-3 outside the top seal, and the exposed PP adhesive 6 is approximately 4.0mm. As shown in Figure 3, a side view of a traditional soft-pack battery with a protection plate, the protection plate 8 is placed in the top seal area by bending the tab 7. The bending point is approximately 0.5mm, and the final width of the top seal is more than 4.5mm.

[0006] like Figure 1As shown in the schematic diagram of a traditional soft-pack battery, there is no need to seal the junction 4 between the unsealed area 3-1 inside the top seal and the unsealed area 2-1 inside the side seal, nor is it necessary to cut a notch at the junction 5 between the sealed area 3-2 inside the top seal and the sealed area 2-2 inside the side seal. Patent number 201621249737.8, by clamping the folded edge between the top seal edge and the corresponding side seal edge between the top seal edge and the front end face, allows the top seal edge to be completely bent onto the front end face and the side seal edge to be completely bent onto the corresponding side face, thereby reducing the reduction in the length of the battery structure. This patent improves the utilization of the space at the top seal end by folding the edges on both sides of the top seal, but it has limitations in practical implementation. It cannot be implemented for double-folded sides. How to fully utilize the space at the top seal end still requires continuous improvement. Summary of the Invention

[0007] To further reduce the width of the top seal, this invention proposes a flexible pouch battery structure with an easily bendable top seal edge. The objective of this invention is achieved through the following technical solution:

[0008] like Figure 4 The diagram shows the widening of the unsealed area inside the top seal. The width of the unsealed area 3-1 inside the top seal is creatively increased from less than 0.5mm in the traditional way to between 0.5-5mm.

[0009] like Figure 5 The diagram illustrates the heat-sealing process between the unsealed areas inside the top seal and the unsealed areas inside the side seal. The junction 4, where the unsealed area 3-1 inside the top seal meets the unsealed area 2-1 inside the side seal, is heat-sealed to create a sealing area. The sealing area can be rectangular, square, fan-shaped, etc., and its area must be greater than 0.25 mm². 2 Preferably, it is larger than 0.5mm. 2 ;

[0010] like Figure 6 The diagram shows the cutting at the junction of the top sealing area and the side sealing area. A notch (5) is cut at the junction of the top sealing area 3-2 and the side sealing area 2-2, creating a rectangular, square, or fan-shaped area. The cut area needs to be greater than 0.25mm. 2 Preferably, it is larger than 0.5mm. 2 After the notch is cut, the top sealing area becomes easier to bend;

[0011] like Figure 7 The schematic diagram of the welding of the protection board for the soft-pack battery cell shows that the protection board 8 is welded at the tab 7;

[0012] like Figure 8 The schematic diagram shows the insulating adhesive applied to the side of the welding joint of the soft-pack battery cell protection board. An insulating layer 9 is applied to the protection board and the welding position to facilitate subsequent bending.

[0013] like Figure 9A schematic diagram of the first bending zone shows that there is a first bending zone 10 between the exposed PP adhesive 6 and the protective plate 8.

[0014] like Figure 10 The first folding diagram shows that the protective plate 8 and insulating glue 9 fall on the exposed PP glue 6, the unsealed area 3-3 outside the top seal, and the sealed area 3-2 of the top seal.

[0015] like Figure 11 A schematic diagram of the second bending area, which is located on the top seal area 3-2 or on the unsealed area 3-1 inside the top seal;

[0016] like Figure 12 The battery structure shown in the schematic diagram of the top edge L-shaped folded edge structure, after being bent twice, forms a top edge L-shaped folded edge structure. This structure includes an unsealed area 3-1 inside the top seal, a sealed area 3-2 inside the top seal, an unsealed area 3-3 outside the top seal, exposed PP glue 6, tabs 7, a protection plate 8, and an adhesive layer 12 between the protection plate 8 and the main body of the cell 1. Its main feature is that the unsealed area 3-3 outside the top seal and the exposed PP glue 6 in the bent part are perpendicular to the unsealed area 3-2 inside the top seal.

[0017] like Figure 13 As shown in the schematic diagram of the top-side U-shaped folded edge structure, after two bends, a top-side U-shaped structure battery is formed. This structure includes an unsealed area 3-1 inside the top seal, a sealed area 3-2 inside the top seal, an unsealed area 3-3 outside the top seal, exposed PP adhesive 6, tabs 7, a protective plate 8, and an adhesive layer 13 between the two U-shaped folded edges. Its main feature is that the bent part - the unsealed area 3-3 outside the top seal, the exposed PP adhesive 6, etc. are parallel to the unsealed area 3-2 inside the top seal.

[0018] The beneficial effects of this invention are as follows:

[0019] By increasing the width of the unsealed area 3-1 inside the top seal, and then forming a sealing area 4 at the junction of the unsealed area 3-1 inside the top seal and the unsealed area 2-1 inside the side seal, and cutting a notch at the junction 5 of the sealing area 2-2 of the side seal and the sealing area 3-2 of the top seal, the top seal end is bent two or more times to form a battery structure with an L-shaped fold on the top edge or a U-shaped fold on the top edge and side edge. This significantly reduces the width of the top seal end, reducing the width of the top seal area of ​​the finished battery from the traditional 4.5mm to 2.5mm or narrower, an improvement of more than 35%. Attached Figure Description

[0020] The invention will be further illustrated with reference to the accompanying drawings, but the contents of the drawings do not constitute any limitation on the invention.

[0021] Figure 1 Traditional pouch battery structure planar diagram

[0022] Figure 2 Side view of traditional pouch battery structure

[0023] Figure 3 Side view of a traditional pouch battery with a protection plate

[0024] Figure 4 Schematic diagram of widening of the unsealed area inside the top seal of the present invention

[0025] Figure 5 Schematic diagram of the heat-sealing seal at the junction of the unsealed area inside the top seal and the unsealed area inside the side seal of this invention.

[0026] Figure 6 Schematic diagram of the cutting at the junction of the top seal area and the side seal area of ​​this invention

[0027] Figure 7 Schematic diagram of welding of the soft-pack battery cell protection board of the present invention

[0028] Figure 8 Schematic diagram of insulating adhesive applied to the welding joint of the soft-pack battery cell protection board of this invention

[0029] Figure 9 Schematic diagram of the first bending area of ​​the present invention

[0030] Figure 10 First folding diagram of the present invention

[0031] Figure 11 Schematic diagram of the second bending area of ​​the present invention

[0032] Figure 12 Schematic diagram of the L-shaped folded edge structure of the present invention

[0033] Figure 13 Schematic diagram of the top side U-shaped folded edge structure of the present invention

[0034] Figure 14 Schematic diagram of the L-shaped folded edge structure at the top edge of the present invention without protective plate

[0035] Figure 15 Schematic diagram of the U-shaped folded edge structure on the top side of the unprotected plate of this invention

[0036] The annotations in the attached figures are explained as follows:

[0037] 1. Battery cell body,

[0038] 2. Side sealing area (including the side sealing area and the unsealed area inside the side sealing), 2-1 unsealed area inside the side sealing, 2-2 side sealing area, 3. Top sealing area (including the top sealing area and the unsealed area inside and outside the top sealing), 3-1 unsealed area inside the top sealing, 3-2 top sealing area, 3-3 unsealed area outside the top sealing, 4. Boundary between the unsealed area inside the top sealing and the unsealed area inside the side sealing, 5. Boundary between the top sealing and the side sealing, 6. Exposed PP adhesive, 7. Electrode tab, 8. Protective plate, 9. Insulation layer of the protective plate and the welding position, 10. First bending area, 11. Second bending area, 12. Adhesive layer between the L-shaped folded edge protective plate and the cell body, 13. Adhesive layer between the two U-shaped folded edges, 14. Adhesive layer between the conventional cell protective plate and the cell body, 15. Adhesive layer between the conventional cell protective plate and the top sealing end of the cell. Detailed Implementation

[0039] To make the purpose, technical solution, and advantages of the invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and examples. Detailed Implementation Method 1

[0041] The battery structure of the present invention—the L-shaped folded edge structure at the top edge—will be described in detail with reference to the accompanying drawings.

[0042] Reference Figures 4 to 12 According to the battery structure of the present invention, there are a cell body 1, a side sealing area 2, an unsealed area inside the side sealing 2-1, a side sealing area 2-2, a top sealing area 3, an unsealed area inside the top sealing 3-1, a top sealing area 3-2, an unsealed area outside the top sealing 3-3, a junction 4 between the unsealed area inside the top sealing 3-1 and the unsealed area inside the side sealing 2-1, a junction 5 between the top sealing area 3-2 and the side sealing area 2-2, an exposed PP adhesive 6, an electrode tab 7, a protective plate 8, an insulating layer 9 for the protective plate and the welding position, a first bending area 10, a second bending area 11, and an adhesive layer 12 between the top L-shaped folded edge protective plate 8 and the cell body 1.

[0043] Reference Figure 4 According to the battery structure of the present invention, the top sealing edge area 3 is designed as follows: the width of the unsealed area 3-1 inside the top seal is 1.5+ / -0.2mm, the width of the top seal sealing area 3-2 is 1.0+ / -0.2mm, and the width of the outer unsealed area sealing edge 3-3 is 0.5+ / -0.2mm. The side sealing edge area 2 is designed as follows: the width of the unsealed area 2-1 inside the side seal is 0.5+ / -0.2mm, and the width of the side seal sealing area 2-2 is 1.5+ / -0.2mm. The exposed PP adhesive 6 has a width not exceeding 2.0mm.

[0044] Reference Figure 5According to the battery structure of the present invention, the junction 4 between the unsealed area 3-1 in the top seal and the unsealed area 2-1 in the side seal is designed as follows: the sealing area at the junction 4 is rectangular in shape, with a length of 2.2 mm and a width of 1.2 mm, and the sealing area at the junction is 2.64 mm². 2 After mechanical packaging, the battery cells are obtained with the designed dimensions.

[0045] Reference Figure 6 According to the battery structure of the present invention, the junction 5 between the top seal 3-2 and the side seal 2-2 is cut into a rectangular shape. The width of the cut side seal edge is 2.0 mm, the width of the cut top seal edge is 1.2 mm, and the area of ​​the cut junction 5 is approximately 2.4 mm². 2 ;

[0046] Reference Figure 7 According to the battery structure of the present invention, a protective plate 8 is welded at the tab 7. The protective plate 8 has a width of 2.5 mm and a thickness of 1.5 mm.

[0047] Reference Figure 8 According to the battery structure of the present invention, an insulating layer 9 is attached to the position of the welding protection plate, and the thickness of the insulating layer is 0.05mm;

[0048] Reference Figure 9 According to the battery structure of the present invention, the tab area between the exposed PP adhesive 6 and the protective plate 8 is the first bending area 10. The first bending area 10 is folded in half, and the folding position is 0.2 mm away from the protective plate.

[0049] Reference Figure 10 According to the battery structure of the present invention, the bent protective plate 8 and insulating layer 9 fall on the exposed PP glue 6, the unsealed area 3-3 outside the top seal, and the top seal area 3-2.

[0050] Reference Figure 11 According to the battery structure of the present invention, the folded protective plate 8, insulating layer 9, exposed PP glue 6, unsealed area 3-3 outside the top seal, and top seal 3-2 are regarded as a whole and bent. The bending area 11 is located on the top seal area 3-2 or the unsealed area 3-1 inside the top seal. The bending area 11 is bent. In this embodiment, the bending position is located in the middle of the top seal area 3-2.

[0051] Reference Figure 12 According to the battery structure of the present invention, after the top sealing area 3-2 is bent in the middle, the protective plate 8 is made to stand up and be perpendicular to the unsealed area 3-1 inside the top seal. An adhesive layer 12 is placed between the protective plate 8 and the cell body 1 so that the protective plate 8 is close to the cell body 1 to prevent the folded edge from opening.

[0052] Reference Figure 12According to the battery structure of the present invention, the top seal width of the final battery is no more than 2.5mm, which is an improvement of about 2mm compared with the traditional 4.5mm width structure, achieving an improvement of more than 40%. Detailed Implementation Method 2

[0054] The battery structure of the present invention—the top edge U-shaped folded edge structure—will be described in detail below with reference to the accompanying drawings;

[0055] Reference Figures 4 to 11 ,as well as Figure 13 According to the battery structure of the present invention, there are a cell body 1, a side sealing area 2, an unsealed area inside the side sealing 2-1, a side sealing area 2-2, a top sealing area 3, an unsealed area inside the top sealing 3-1, a top sealing area 3-2, an unsealed area outside the top sealing 3-3, a junction 4 between the unsealed area inside the top sealing 3-1 and the unsealed area inside the side sealing 2-1, a junction 5 between the top sealing area 3-2 and the side sealing area 2-2, an exposed PP adhesive 6, an electrode tab 7, a protective plate 8, an insulating layer 9 for the protective plate and the welding position, a first bending area 10, a second bending area 11, and an adhesive layer 13 at the middle of the side U-shaped fold.

[0056] Reference Figure 4 According to the battery structure of the present invention, the top sealing area 3 is designed as follows: the width of the unsealed area 3-1 inside the top seal is 2+ / -0.2mm, the width of the top seal sealing area 3-2 is 1.0+ / -0.2mm, and the width of the outer unsealed area sealing edge 3-3 is 0.5+ / -0.2mm. The side sealing area 2 is designed as follows: the width of the unsealed area 2-1 inside the side seal is 0.5+ / -0.2mm, and the width of the side seal sealing area 2-2 is 1.5+ / -0.2mm. The exposed PP adhesive 6 is designed to have a width not exceeding 2mm.

[0057] Reference Figure 5 According to the battery structure of the present invention, the junction 4 between the unsealed area 3-1 in the top seal and the unsealed area 2-1 in the side seal is designed as follows: the shape of the junction seal 4 is rectangular, with a length of 2.2 mm and a width of 2 mm, and the sealing area of ​​the junction 4 is 4.4 mm². 2 After mechanical packaging, the battery cells are obtained with the designed dimensions.

[0058] Reference Figure 6 According to the battery structure of the present invention, the junction 5 between the top sealing area 3-2 and the side sealing area 2-2 is cut into a rectangular shape. The width of the cut side sealing edge is 2.2 mm, the width of the cut top sealing edge is 2 mm, and the area of ​​the cut junction is approximately 4.4 mm². 2 ;

[0059] Reference Figure 7According to the battery structure of the present invention, a protective plate 8 is welded at the tab 7. The protective plate 8 has a width of 2.0 mm and a thickness of 1.5 mm.

[0060] Reference Figure 8 According to the battery structure of the present invention, an insulating layer 9 is attached to the position of the welding protection plate, and the thickness of the insulating layer is 0.05mm;

[0061] Reference Figure 9 According to the battery structure of the present invention, the tab area between the exposed PP adhesive 6 and the protective plate 8 is the first bending area 10. The first bending area 10 is folded in half, and the bending position is 0.2 mm away from the protective plate.

[0062] Reference Figure 10 According to the battery structure of the present invention, the bent protective plate 8 and insulating layer 9 fall on the exposed PP glue 6, the unsealed area 3-3 of the top seal, and the top seal sealing area 3-2;

[0063] Reference Figure 11 According to the battery structure of the present invention, the folded protective plate 8, the insulating layer 9, the exposed PP glue 6, the unsealed area 3-3 outside the top seal, and the sealing area 3-2 of the top seal are regarded as a whole. The bending position 11 is located on the top seal in the sealing area 3-2 or the unsealed area 3-1 inside the top seal. In this embodiment, the bending position is located in the middle of the sealing area 3-2 of the top seal.

[0064] Reference Figure 13 According to the battery structure of the present invention, after the top sealing area 3-2 is folded in half, the protective plate 8 is parallel to the unsealed area 3-1 inside the top seal. An adhesive layer 13 is placed in the middle of the side U-shaped fold to make the folded layers firmly bonded together and prevent the fold from opening.

[0065] Reference Figure 13 According to the battery structure of the present invention, the top seal width of the final battery is 3.0mm, which is an improvement of about 1.5mm compared with the traditional 4.5mm width structure, representing an improvement of more than 33%. Detailed Implementation Method 3

[0067] The battery structure of the present invention—a battery structure without a protective plate at the top end—will be described in detail below with reference to the accompanying drawings.

[0068] Reference Figures 4 to 11 ,as well as Figure 14 , Figure 15According to the battery structure of the present invention, there are a cell body 1, a side sealing area 2, an unsealed area inside the side sealing 2-1, a side sealing area 2-2, a top sealing area 3, an unsealed area inside the top sealing 3-1, a top sealing area 3-2, an unsealed area outside the top sealing 3-3, a junction 4 between the unsealed area inside the top sealing 3-1 and the unsealed area inside the side sealing 2-1, a junction 5 between the top sealing area 3-2 and the side sealing area 2-2, an exposed PP adhesive 6, a tab 7, a first bending area 10, a second bending area 11, a tab 7 and a top sealing side adhesive layer 12, and an adhesive layer 13 at the middle of the side U-shaped fold.

[0069] Reference Figure 4 According to the battery structure of the present invention, the top sealing area 3 is designed as follows: the width of the unsealed area 3-1 inside the top seal is 1.5+ / -0.2mm, the width of the top seal sealing area 3-2 is 1.0+ / -0.2mm, and the width of the outer unsealed area sealing edge 3-3 is 0.5+ / -0.2mm. The side sealing area 2 is designed as follows: the width of the unsealed area 2-1 inside the side seal is 0.5+ / -0.2mm, and the width of the side seal sealing area 2-2 is 1.5+ / -0.2mm. The width of the exposed PP adhesive 6 is designed not to exceed 2.0mm.

[0070] Reference Figure 5 According to the battery structure of the present invention, the junction 4 between the unsealed area 3-1 inside the top seal and the unsealed area 2-1 inside the side seal is designed as follows: the seal at the junction is designed to be rectangular, with a length of 2 mm and a width of 1.2 mm, and the seal area at the junction is designed to be 2.4 mm². 2 After mechanical packaging, the battery cells are obtained with the designed dimensions.

[0071] Reference Figure 6 According to the battery structure of the present invention, the junction 5 between the top sealing area 3-2 and the side sealing area 2-2 is cut into a rectangular shape. The width of the cut side sealing edge is 2.2 mm, the width of the cut top sealing edge is 1.3 mm, and the area of ​​the cut junction is approximately 2.86 mm². 2 ;

[0072] Reference Figure 8 According to the battery structure of the present invention, a protective plate is not welded at the tab 7, and an insulating layer 9 is directly attached to the tab, the thickness of which is 0.05mm.

[0073] Reference Figure 9 According to the battery structure of the present invention, the tab area between the exposed PP adhesive 6 and the insulating layer 9 is the first bending area 10, and the first bending area 10 is folded in half, with the fold position being 0.2 mm away from the insulating layer.

[0074] Reference Figure 10The folded insulation layer 9 falls on the exposed PP glue 6, the unsealed area 3-3 outside the top seal, and part of the top seal area 3-2;

[0075] Reference Figure 11 According to the battery structure of the present invention, the folded part of the tab 7, the insulating layer 9, the exposed PP glue 6, the unsealed area 3-3 outside the top seal, and the part of the top seal sealing area 3-2 are regarded as a whole. The second bending area 11 is located on the top seal sealing area 3-2 or the unsealed area 3-1 inside the top seal. In this embodiment, the bending position is located in the middle of the top seal sealing area 3-2.

[0076] Reference Figure 14 According to the battery structure of the present invention, for the L-shaped bend at the top edge, the top sealing area 3-2 is bent in the middle so that the tab 7 is perpendicular to the unsealed area 3-1 inside the top seal. An insulating adhesive layer 12 is placed between the tab 7 and the cell body 1 to firmly bond the tab 7 to the cell body 1 and prevent the folded edge from opening. The final top sealing edge width of the finished cell is 1.8mm, which is an improvement of about 2.7mm compared to the traditional 4.5mm width structure, an improvement of more than 50%.

[0077] Reference Figure 15 According to the battery structure of the present invention, for the top side U-shaped folded edge structure, the top sealing area 3-2 is folded in half at the middle so that the tab 7 is parallel to the unsealed area 3-1 inside the top seal. An adhesive layer 13 is placed in the middle of the side U-shaped folded edge to make the folded edges firmly bonded and prevent the folded edges from opening. The final finished battery top seal edge width is 2.8mm, which is an improvement of about 1.7mm compared with the traditional 4.5mm width structure, an improvement of more than 30%.

[0078] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A top-sealed, easily bendable soft-pack battery structure, characterized in that: The width of the unsealed area (3-1) inside the top seal is 0.5-5mm. The unsealed area (3-1) inside the top seal and the unsealed area (2-1) inside the side seal are heat-sealed to form a sealing area (4). Then, a notch is cut at the junction (5) of the sealing area (3-2) inside the top seal and the sealing area (2-2) inside the side seal. Then, the tab (7), the exposed PP glue (6), and the top seal edge area (3) are bent twice or more. The bending method is a fold or an L-shaped bend, which finally forms a top edge L-shaped or top edge side U-shaped folded edge structure.

2. The top-sealed, easily bendable soft-pack battery structure according to claim 1, characterized in that: The width of the unsealed area (3-1) inside the top seal is 0.5-5.0mm, preferably 1.0-3.0mm.

3. The top-sealed, easily bendable soft-pack battery structure according to claim 1, characterized in that: The heat-sealed area (4) at the junction of the unsealed area inside the top seal (3-1) and the unsealed area inside the side seal (2-1) can be a combination of one or more shapes such as a fan, triangle, rectangle, or square, with an area of ​​0.25-30 mm². 2 Between 0.5-10mm is preferred. 2 .

4. The top-sealed, easily bendable soft-pack battery structure according to claim 1, characterized in that: The shape of the cut section at the junction of the top sealing area (3-2) and the side sealing area (2-2) (5) can be square, rectangle, fan-shaped, or a combination of multiple shapes, with a cut area of ​​0.25-30mm. 2 Between 0.5-10mm is preferred. 2 .

5. The top-sealed, easily bendable soft-pack battery structure according to claim 1, characterized in that: The tab (7) and exposed PP glue (6) are bent 2-5 times, preferably 2 times, in the top sealing area (3).

6. The top-sealed, easily bendable soft-pack battery structure according to claim 1, characterized in that: The top edge L-shaped folded edge structure has the bent part perpendicular to the unsealed area (3-1) inside the top seal, while the top edge side U-shaped folded edge structure has the bent part parallel to the unsealed area (3-1) inside the top seal.

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