Soft package battery cell

Abstract

The utility model discloses a soft package battery cell which comprises a shell and a naked battery cell, the shell is provided with a battery cell cavity, the naked battery cell is contained in the battery cell cavity, a positioning hole is formed in the shell, the shell comprises sealing edges located on the periphery of the battery cell cavity, the intersection position of every two adjacent sealing edges is a sealing boundary, and the sealing boundary is located between the two adjacent sealing edges. The sealing edge comprises a tab sealing edge of a tab of the naked battery cell, and the positioning hole is formed in at least one sealing junction on the side of the tab sealing edge. According to the utility model, the problem that the processing or measuring accuracy of each size of the battery is influenced due to positioning slip when the shell is directly positioned in the prior art is solved, and the accuracy of measuring the positions of the positive and negative tabs of the soft package battery cell is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a soft package battery core. BACKGROUND

[0002] In the processing of the soft package battery, the accuracy of positioning will affect the size and performance of the product. After packaging, the conventional positioning mode is to rely on the shell formed after the aluminum plastic film is punched, but the shell is arc-shaped, and the shell depth is shallow, and there is a phenomenon of positioning slip, which affects the processing of each size of the battery. After the battery core is made, each size of the battery core will be measured at the same time, but each size is processed according to the shell positioning, so that there is no accurate reference point. Individual stations will use CCD to grab the top sealing edge and the side sealing edge of the battery core, but the cutting of the top sealing edge and the side sealing edge also relies on the shell positioning.

[0003] Therefore, the processing and measurement associated with the shell positioning are inaccurate, which is easy to cause the shift of the tab position, and may cause the problems of battery performance decline, safety risk increase and the like, and an accurate reference point needs to be designed as the basis for processing and measurement. UTILITY MODEL CONTENT

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a soft package battery core, which improves the accuracy of soft package battery core processing and measurement.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] A soft package battery core, comprising a shell and a bare battery core, the shell has a battery core cavity, the bare battery core is accommodated in the battery core cavity, the shell is provided with a positioning hole, the shell comprises a sealing edge located at the periphery of the battery core cavity, the intersection position of adjacent two sealing edges is a sealing boundary, the sealing edge comprises a tab sealing edge of the bare battery core, and at least one sealing boundary on the side of the tab sealing edge is provided with the positioning hole.

[0007] In an embodiment, the shell comprises a single aluminum plastic film, the single aluminum plastic film is provided with a pit, and the single aluminum plastic film forms the shell after being folded along a center line.

[0008] In an embodiment, the shell is rectangular, comprises three sealing edges, one of the three sealing edges is the tab sealing edge, two tabs are arranged on the tab sealing edge, the tab sealing edge intersects with the other two adjacent sealing edges to form two sealing boundaries, and the two sealing boundaries on the tab sealing edge are provided with the positioning hole.

[0009] In an embodiment, the shell is rectangular, and the shell includes three sealing edges, the three sealing edges include two opposite polar ear sealing edges, each of the two polar ear sealing edges is provided with a polar ear, and each of the two polar ear sealing edges forms a sealing boundary with another sealing edge adjacent thereto, and the sealing boundary of each of the two polar ear sealing edges is provided with the positioning hole.

[0010] In an embodiment, when the single aluminum plastic film is not folded along the center line to form the shell, the single aluminum plastic film is provided with four positioning holes around the punch hole, the four positioning holes include a first positioning hole, a second positioning hole, a third positioning hole, and a fourth positioning hole, the first positioning hole and the second positioning hole are symmetrical about the center line, and the third positioning hole and the fourth positioning hole are symmetrical about the center line; after the single aluminum plastic film is folded to form the shell, the first positioning hole and the second positioning hole overlap with each other to be located at one sealing boundary, and the third positioning hole and the fourth positioning hole overlap with each other to be located at another sealing boundary.

[0011] In an embodiment, the shell includes a first aluminum plastic film and a second aluminum plastic film, the first aluminum plastic film and / or the second aluminum plastic film is provided with a punch hole, and the first aluminum plastic film and the second aluminum plastic film are overlapped and combined to form the shell.

[0012] In an embodiment, the shell is rectangular, and the shell includes four sealing edges, the four sealing edges include one polar ear sealing edge, the polar ear sealing edge is provided with two polar ears, and at least one sealing boundary on the polar ear sealing edge is provided with the positioning hole.

[0013] In an embodiment, the shell is rectangular, and the shell includes four sealing edges, the four sealing edges include two opposite polar ear sealing edges, each of the two polar ear sealing edges is provided with a polar ear, and at least one sealing boundary on each of the two polar ear sealing edges is provided with the positioning hole.

[0014] In an embodiment, the shell has a first direction, and along the first direction, the perpendicular distance from the center of the positioning hole to the battery cavity is L1, and L1 ranges from 8 mm to 25 mm.

[0015] In an embodiment, the shell has a second direction, and along the second direction, the perpendicular distance from the center of the positioning hole to the battery cavity is L2, and L2 ranges from 3 mm to 15 mm.

[0016] In an embodiment, the diameter of the positioning hole is D, and D ranges from 0.5 mm to 5 mm.

[0017] The utility model has the advantages of the following: the positioning hole is arranged on at least one sealing joint of the sealing edge of the tab, the position of the positive and negative tabs can be accurately positioned through the positioning hole, the accuracy of the position of the positive and negative tabs is improved, and the performance of the battery is ensured; when the soft package battery core is subjected to top sealing, side sealing and other cutting processes, the positioning hole will not be cut off in the process, and when the other processes are positioned and processed or measured based on the positioning hole on the soft package battery core, the accuracy of the processing and measurement related to the positioning of the shell is improved, the original positioning of the shell is solved, the problem of positioning slip is solved, and the processing and measurement accuracy of the size of the battery is affected. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will be briefly introduced the drawings needed to be used in the embodiment, it should be understood, the following drawings only show some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0019] Figure 1 It is the structural schematic diagram of the single aluminum plastic film of the utility model;

[0020] Figure 2a It is Figure 1 The structural schematic diagram of the soft package battery core of an embodiment formed after the single aluminum plastic film in it is folded;

[0021] Figure 2b It is the structural schematic diagram of the soft package battery core of another embodiment formed after the single aluminum plastic film is folded;

[0022] Figure 2c It is the structural schematic diagram of the soft package battery core of another embodiment formed after the single aluminum plastic film is folded;

[0023] Figure 3 It is Figure 2a The position relation schematic diagram of the positioning hole and the shell at A in it;

[0024] Figure 4 It is Figure 2a Or 2b - the structural schematic diagram of the encapsulation;

[0025] Figure 5 It is the structural schematic diagram of the first aluminum plastic film and the second aluminum plastic film of the utility model;

[0026] Figure 6a It is Figure 5 The structural schematic diagram of the soft package battery core of an embodiment formed after the two aluminum plastic films in it are combined;

[0027] Figure 6bis a structural schematic view of a soft package battery cell formed by combining two aluminum plastic films, which is another embodiment of the soft package battery cell;

[0028] Figure 6c is a structural schematic view of a soft package battery cell formed by combining two aluminum plastic films, which is another embodiment of the soft package battery cell;

[0029] Figure 6d is a structural schematic view of a soft package battery cell formed by combining two aluminum plastic films, which is another embodiment of the soft package battery cell.

[0030] In the figure: 1, shell; 11, battery cell cavity; 2, bare battery cell; 21, tab; 3, positioning hole; 31, first positioning hole; 32, second positioning hole; 33, third positioning hole; 34, fourth positioning hole; 4, sealing edge; 41, tab sealing edge; 5, sealing boundary; 6A, single aluminum plastic film; 6B, first aluminum plastic film; 6C, second aluminum plastic film; 61, pit; 62, center line. DETAILED DESCRIPTION

[0031] The specific embodiments of the present application will be described below in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the description of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] In the description of the present application, unless otherwise explicitly specified and limited, the terms "set", "install", "connect" and the like should be broadly understood, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0033] The terms "up", "down", "left", "right", "front", "back", "top", "bottom", "inside", "outside" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, which is only for the convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0034] The terms "first", "second", "third" and the like are only for distinguishing similar attributes of elements, and do not indicate or imply relative importance or a specific order.

[0035] The terms "comprise", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0036] The utility model provides a kind of soft package battery core, as shown in Figures 1 to 6d Figure, including shell 1 and bare battery core 2, shell 1 has battery core cavity 11, bare battery core 2 is contained in battery core cavity 11, shell 1 is equipped with positioning hole 3, shell 1 includes the seal edge 4 of battery core cavity 11 periphery, the intersection position of adjacent two seal edges 4 is seal junction 5, seal edge 4 includes the tab seal edge 41 of bare battery core 2 tab, at least one seal junction 5 on the side of tab seal edge 41 is equipped with positioning hole 3.In this embodiment, at least one seal junction 5 on the side of tab seal edge 41 is provided with positioning hole 3, the position of positive and negative tab can be accurately positioned through positioning hole 3 whether to deviate, to improve the accuracy of the position of positive and negative tab, guarantee battery performance;And when cutting processing such as top sealing, side sealing to soft package battery core, positioning hole 3 will not be cut off in the processing process, when other process positioning processing or measurement is carried out with the positioning hole 3 on soft package battery core as reference point, the accuracy of processing and measurement associated with shell 1 positioning is improved, solve the phenomenon of positioning slip in the processing of soft package battery, so the processing and measurement associated with shell 1 positioning are not accurate, greatly improve the convenience and accuracy of positioning processing and measurement to soft package battery core.

[0037] Wherein, in a soft package battery core, seal edge 4 includes the tab seal edge 41 of bare battery core 2 tab, one tab seal edge 41 is equipped with one or two tabs 21, that is, divided into same side tab ( Figure 2a ) or opposite side tab ( Figure 2c ) two cases.When same side tab, shell 1 includes one tab seal edge 41, that is, two tabs 21 are arranged on the tab seal edge 41, at least one seal junction 5 on the two seal junctions 5 on the tab seal edge 41 is equipped with positioning hole 3 (such as Figure 2b And Figure 6b ), the position of two tabs 21 of tab seal edge 41 can be positioned;When opposite side tab, shell 1 includes two opposite tab seal edges 41, that is, two tabs 21 are arranged on two tab seal edges 41, one tab seal edge 41 is provided with one tab 21, at least one seal junction 5 on each tab seal edge 41 is equipped with positioning hole 3, that is, at least two positioning holes 3 (such as Figure 2c And Figure 6c ) are provided on shell 1 in this case, the position of tab 21 of two opposite tab seal edges 41 can be positioned.

[0038] As an implementation form, as shown in Figure 1 and Figure 2a The shell 1 includes a single aluminum plastic film 6A provided with a punched pit 61, and the single aluminum plastic film 6A is folded along a center line 62 to form the shell 1, and the punched pit 61 after folding is combined into the cell cavity 11.

[0039] As an implementation form, as shown in Figure 1 and Figure 2a The shell 1 formed by folding the single aluminum plastic film 6A along the center line 62 is rectangular, and includes three sealing edges 4, one of which is a tab sealing edge 41, and two tabs 21 are arranged on the tab sealing edge 41 to form a soft package cell with tabs on the same side. The tab sealing edge 41 intersects with the other two adjacent sealing edges 4 to form two sealing junctions 5, and the two sealing junctions 5 on the tab sealing edge 41 are provided with positioning holes 3, which can be used as a measurement reference. By measuring the distance between the positioning hole 3 and the positive and negative tabs, it can be determined whether the tab 21 position is deviated, and then the positioning hole 3 can be cut off (as shown in Figure 4 ) during the subsequent cell assembly into a module, which will not affect the sealing of the soft package cell. At the same time, by limiting the two positioning holes 3, the outer periphery of the shell 1 after folding the single aluminum plastic film 6A is prevented from being inclined, which can further improve the alignment accuracy of the shell 1 formed by folding the single aluminum plastic film 6A, and the size accuracy of the soft package battery can be improved. Figure 2b As shown in , only one of the two sealing junctions 5 on the tab sealing edge 41 is provided with a positioning hole 3, which can realize the positioning of the positions of the two tabs 21, but cannot position the alignment accuracy of the shell 1 formed by folding the single aluminum plastic film 6A.

[0040] As an implementation form, as shown in Figure 1 and Figure 2c The shell 1 formed by folding the single aluminum plastic film 6A along the center line 62 is rectangular, and includes three sealing edges 4, two of which are tab sealing edges 41, and one tab 21 is arranged on each of the two tab sealing edges 41 to form a soft package cell with tabs on the opposite side. The two tab sealing edges 41 each form a sealing junction 5 with the other adjacent sealing edge 4, and the sealing junctions 5 on the two tab sealing edges 41 are provided with positioning holes 3, which realize the positioning measurement of whether the tab 21 position is deviated, and by limiting the two positioning holes 3, the alignment accuracy of the shell 1 formed by folding the single aluminum plastic film 6A can be ensured, and the outer periphery of the shell 1 after folding the single aluminum plastic film 6A is prevented from being inclined, which can improve the size accuracy of the soft package battery.

[0041] As an implementation form, as shown in Figure 1As shown, when the single aluminum-plastic film 6A is not folded along the center line 62 to form the housing 1, four positioning holes 3 are provided around the punching hole 61 of the single aluminum-plastic film 6A. The four positioning holes 3 include a first positioning hole 31, a second positioning hole 32, a third positioning hole 33 and a fourth positioning hole 34. The first positioning hole 31 and the second positioning hole 32 are symmetrical about the center line 62, and the third positioning hole 33 and the fourth positioning hole 34 are symmetrical about the center line 62. Figure 2a As shown, a single aluminum-plastic film 6A is folded to form a shell 1. In the shell 1, the first positioning hole 31 and the second positioning hole 32 overlap with each other and are located at a sealed intersection 5, and the third positioning hole 33 and the fourth positioning hole 34 overlap with each other and are located at another sealed intersection 5. The punching pit 61 is formed by punching the aluminum-plastic film through a punching mechanism (not shown), and the positioning hole 3 is punched out by a punching needle (not shown). The punching pit 61 and the positioning hole 3 are made by the same mold, that is, the punching pit 61 and the positioning hole 3 are first punched out on the aluminum-plastic film, and then the aluminum-plastic film 6 is folded; when the aluminum-plastic film is folded to form the shell 1, the overlap of the positioning holes 3 on the shell 1 can be detected to determine the alignment accuracy of the single aluminum-plastic film 6A after folding to form the shell 1, which can improve the dimensional accuracy of the soft-pack battery.

[0042] As an implementation method, Figure 5 and Figure 6a As shown, the housing 1 includes a first aluminum-plastic film 6B and a second aluminum-plastic film 6C. The first aluminum-plastic film 6B and / or the second aluminum-plastic film 6C are provided with a dent 61. The first aluminum-plastic film 6B and the second aluminum-plastic film 6C overlap and merge to form the housing 1. When both the first aluminum-plastic film 6B and the second aluminum-plastic film 6C are provided with a dent 61, the two dents 61 merge to form the battery cell cavity 11. When only the first aluminum-plastic film 6B or the second aluminum-plastic film 6C is provided with a dent 61, the dent 61 serves as the battery cell cavity 11 of the housing 1.

[0043] As an implementation method, Figure 5 and Figure 6a As shown, the shell 1 is rectangular and includes four sealing edges 4. The four sealing edges 4 include a tab sealing edge 41. The tab sealing edge 41 is provided with two tabs 21 to form a tab battery cell with tabs on the same side. At least one sealing boundary 5 on the tab sealing edge 41 is provided with a positioning hole 3 to realize the positioning measurement of whether the tab 21 position is offset. At least one sealing boundary 5 on the diagonal line formed with the positioning hole 3 is also provided with a positioning hole 3. The two diagonal positioning holes 3 can be used to determine whether the first aluminum-plastic film 6B and the second aluminum-plastic film 6C are aligned, which can improve the dimensional accuracy of the soft-pack battery. Specifically, as shown in FIG. Figure 6b As shown, only one positioning hole 3 is provided on the housing 1. When the positioning hole 3 is provided on a sealing boundary 5 on the side of the tab sealing edge 41, it is possible to measure whether the tab 21 position is offset. At the same time, when two positioning holes 3 are provided on the housing 1 (such as Figure 6aWhen the three positioning holes 3 (not shown) or the four positioning holes 3 (not shown) are located on the diagonal line, the accurate judgment on whether the first aluminum plastic film 6B and the second aluminum plastic film 6C are aligned can be achieved.

[0044] As an implementation form, as shown in Figure 6d The shell 1 is rectangular, and the shell 1 includes four sealing edges 4, the four sealing edges 4 include two opposite tab sealing edges 41, one tab 21 is arranged on each of the two tab sealing edges 41, and at least one sealing junction 5 on the side of each tab sealing edge 41 is provided with a positioning hole 3 to measure the position of the tab 21 on the corresponding side of the tab sealing edge 41, and when at least two positioning holes 3 are located on the diagonal line, the accurate judgment on whether the first aluminum plastic film 6B and the second aluminum plastic film 6C are aligned can be achieved. The punch pit 61 is formed by punching the aluminum plastic film by a punching mechanism, the positioning hole 3 is punched by a punch pin, and the punch pit 61 and the positioning hole 3 are formed by the same mold, that is, the punch pit 61 and the positioning hole 3 are first punched on the aluminum plastic film, and then the two aluminum plastic films are combined to form a shell 1. The shell 1 can accurately position whether the two aluminum plastic films are aligned through the two positioning holes 3 on the diagonal line, and the position deviation of the two aluminum plastic films when combined can be avoided; as shown in Figure 6c When the positioning hole 3 is not arranged on the diagonal line, the positioning hole 3 on one side of the tab 21 can be used as a measurement reference to determine whether the position of the tab 21 deviates by measuring the distance between the positioning hole 3 on the corresponding side and the tab 21, but the position deviation of the two aluminum plastic films when combined cannot be determined. By first punching the positioning hole 3 on the aluminum plastic film, the positioning hole 3 and the punch pit 61 are formed at one time, instead of punching the positioning hole 3 after the soft-pack battery cell is formed by packaging, which simplifies the processing procedure, improves the production efficiency, and accurately positions the alignment precision of the aluminum plastic film folded or combined to form the shell 1 through the positioning hole 3, so as to improve the size precision of the soft-pack battery.

[0045] As an implementation form, as shown in Figure 2a and Figure 3 The shell 1 has a first direction X, and the vertical distance from the center of the positioning hole 3 to the battery cell cavity 11 along the first direction X is L1, and L1 is in the range of 8-25 mm or 10-18 mm. That is, L1 is the vertical distance from the center of the positioning hole 3 to the punch pit 61 along the first direction X. Since the punch pit 61 and the positioning hole 3 are formed by the same mold, the positional relationship between the two can be confirmed. When a single aluminum plastic film 6A is folded along the center line 62 to form a shell 1, the punch pit 61 after folding is combined into the battery cell cavity 11; when the first aluminum plastic film 6B and the second aluminum plastic film 6C are both provided with the punch pit 61, the two punch pits 61 are combined to form the battery cell cavity 11; when only the first aluminum plastic film 6B or the second aluminum plastic film 6C is provided with the punch pit 61, the punch pit 61 is the battery cell cavity 11 of the shell 1.

[0046] As an implementation form, as shown in Figure 2a and Figure 3 The shell 1 has a second direction Y, and the vertical distance from the center of the positioning hole 3 to the battery cavity 11 along the second direction Y is L2, and L2 is 3-15mm, or 6-10mm. That is, L2 is the vertical distance from the center of the positioning hole 3 to the punch pit 61 along the first direction Y. Since the punch pit 61 and the positioning hole 3 are made by the same mold, the positional relationship between the two can be confirmed.

[0047] As an implementation form, as shown in Figure 2a and Figure 3 The diameter of the positioning hole 3 is D, and D is 0.5-5mm, or 1-3mm. The diameter of the positioning hole 3 should not be too large, otherwise it will reduce the alignment accuracy and measurement accuracy.

[0048] The beneficial effects of the utility model are:

[0049] 1. The positioning hole 3 is arranged on at least one sealing boundary 5 on the side of the tab sealing edge 41, and the position of the positive and negative tabs can be accurately positioned through the positioning hole 3, so as to improve the accuracy of the position of the positive and negative tabs and ensure the battery performance. When the soft package battery is top-sealed, side-sealed and cut, the positioning hole 3 will not be cut off during the processing, and the positioning hole 3 on the soft package battery is used as a reference point for positioning processing or measurement, thereby improving the accuracy of the processing and measurement related to the positioning of the shell 1, solving the problem that the original positioning of the shell 1 is prone to slipping and affecting the processing or measurement accuracy of the battery size.

[0050] 2. The positioning hole 3 is formed on the aluminum plastic film by stamping, and the positioning hole 3 and the punch pit 61 are formed by one-time stamping, instead of being formed by stamping after the soft package battery is packaged, thereby simplifying the processing procedure, improving the production efficiency, and accurately positioning the aluminum plastic film through the positioning hole 3 to improve the alignment accuracy of the shell 1 formed by folding or combining the aluminum plastic film, thereby improving the size accuracy of the soft package battery.

[0051] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as above, it is not intended to limit the utility model. Any person skilled in the art can make some changes or modifications to the disclosed technical content without departing from the technical solution range of the utility model, and the equivalent embodiments of equivalent changes, as long as they do not depart from the technical solution content of the utility model, and any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A pouch cell, characterized by, The shell (1) has a cell cavity (11), and the bare cell (2) is accommodated in the cell cavity (11); the shell (1) is provided with a positioning hole (3); the shell (1) comprises a sealing edge (4) located at the periphery of the cell cavity (11); adjacent two sealing edges (4) intersect to form a sealing junction (5); the sealing edge (4) comprises a tab sealing edge (41) of the tab of the bare cell (2); at least one sealing junction (5) on the side of the tab sealing edge (41) is provided with the positioning hole (3).

2. The pouch cell of claim 1, wherein, The shell (1) comprises a single aluminum plastic film (6A) provided with a pit (61); the single aluminum plastic film (6A) is folded along a center line (62) to form the shell (1).

3. The pouch cell of claim 2, wherein, The shell (1) is rectangular and comprises three sealing edges (4); one of the three sealing edges (4) is the tab sealing edge (41); the tab sealing edge (41) is provided with two tabs (21); the tab sealing edge (41) intersects with the other two adjacent sealing edges (4) to form two sealing junctions (5); at least one sealing junction (5) on the tab sealing edge (41) is provided with the positioning hole (3).

4. The pouch cell of claim 2, wherein, The shell (1) is rectangular and comprises three sealing edges (4); the three sealing edges (4) comprise two opposite tab sealing edges (41); each of the two tab sealing edges (41) is provided with one tab (21); the two tab sealing edges (41) each form a sealing junction (5) with the other adjacent sealing edge (4); the sealing junctions (5) on the sides of the two tab sealing edges (41) are each provided with the positioning hole (3).

5. The pouch cell of claim 2, wherein, When the single aluminum plastic film (6A) is not folded along the center line (62) to form the shell (1), the pit (61) of the single aluminum plastic film (6A) is provided with four positioning holes (3) around the pit (61); the four positioning holes (3) comprise a first positioning hole (31), a second positioning hole (32), a third positioning hole (33), and a fourth positioning hole (34); the first positioning hole (31) and the second positioning hole (32) are symmetrical about the center line (62); the third positioning hole (33) and the fourth positioning hole (34) are symmetrical about the center line (62); after the single aluminum plastic film (6A) is folded to form the shell (1), the first positioning hole (31) and the second positioning hole (32) coincide with each other in one sealing junction (5), and the third positioning hole (33) and the fourth positioning hole (34) coincide with each other in the other sealing junction (5).

6. The pouch cell of claim 1, wherein, The shell (1) comprises a first aluminum plastic film (6B) and a second aluminum plastic film (6C); the first aluminum plastic film (6B) and / or the second aluminum plastic film (6C) is provided with a pit (61); the first aluminum plastic film (6B) and the second aluminum plastic film (6C) are overlapped and combined to form the shell (1).

7. The pouch cell of claim 6, wherein, The shell (1) is rectangular, the shell (1) includes four sealing edges (4), four sealing edges (4) include one of the tab sealing edge (41), the tab sealing edge (41) is provided with two tabs (21), at least one sealing interface (5) on the tab sealing edge (41) is provided with the positioning hole (3).

8. The pouch cell of claim 6, wherein, The shell (1) is rectangular, the shell (1) includes four sealing edges (4), four sealing edges (4) include two opposite tab sealing edges (41), two tab sealing edges (41) are respectively provided with one tab (21), and at least one sealing interface (5) on the side of each tab sealing edge (41) is provided with the positioning hole (3).

9. The pouch cell of any one of claims 1-8, wherein, The shell (1) has a first direction (X), and the perpendicular distance from the center of the positioning hole (3) to the battery cavity (11) is L1 along the first direction (X), and L1 ranges from 8 to 25 mm.

10. The pouch cell of any one of claims 1-8, wherein, The shell (1) has a second direction (Y), and the perpendicular distance from the center of the positioning hole (3) to the battery cavity (11) is L2 along the second direction (Y), and L2 ranges from 3 to 15 mm.

11. The pouch cell of any one of claims 1-8, wherein, The diameter of the positioning hole (3) is D, and D ranges from 0.5 to 5 mm.

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