Packaging structure and battery
By designing a specific packaging structure, the second edge sealing part set at an oblique angle avoids folding interference, the problem of difficulty in cutting edge folding in the sealing junction area during battery packaging is solved, and the packaging difficulty is reduced, making it easier to use the internal series technology of the battery cell.
Patent Information
- Application Number
- CN202420573667.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-22
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-03-22
AI Technical Summary
In the prior art, the in-cell series technology has a problem of edge interfering in the sealing junction area during the packaging process, which increases the difficulty of packaging and affects the application.
A packaging structure is designed, including a first accommodating cavity and a second accommodating cavity. Through a specific connection method of the first sealing part, the second sealing part and the third sealing part, the extension direction of the second sealing part intersects the first sealing part and the third sealing part, so that it is arranged at an oblique angle to avoid folding interference.
Through this packaging structure, the packaging difficulty is reduced, the internal series technology application of the battery cell is facilitated, and interference at the edge junction is avoided.
Smart Images
Figure CN222705646U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery packaging, in particular to a packaging structure and a battery. Background Art
[0002] The related technology has an internal series connection technology for batteries. In the internal series batteries of the related technology, a layer of aluminum-plastic film is added as a partition to separate the battery cells and block the flow of particles between the battery cells. Due to the existence of the partition, the battery cells need to be packaged on all sides. However, there will be an edge folding interference problem in the sealed junction area during packaging, which makes folding difficult and affects the application of this technology. Utility Model Content
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a packaging structure that can reduce the difficulty of packaging.
[0004] The utility model also provides a battery with the above packaging structure.
[0005] According to the packaging structure of the embodiment of the utility model, the packaging structure is provided with a first accommodating cavity and a second accommodating cavity, the first accommodating cavity and the second accommodating cavity are arranged at intervals along the first direction, the first accommodating cavity and the second accommodating cavity are respectively used to accommodate battery cells, the packaging structure includes a first edge sealing portion, a second edge sealing portion and a third edge sealing portion, the first edge sealing portion, the second edge sealing portion and the third edge sealing portion are respectively located on the outer sides of the first accommodating cavity and the second accommodating cavity perpendicular to the first direction, the first edge sealing portion, the second edge sealing portion and the third edge sealing portion are connected in sequence, the first edge sealing portion, the second edge sealing portion and the third edge sealing portion have a set extension direction, the extension direction of the second edge sealing portion intersects with the extension direction of the first edge sealing portion, and the extension direction of the second edge sealing portion intersects with the extension direction of the third edge sealing portion.
[0006] According to the packaging structure of the embodiment of the utility model, at least the following beneficial effects are achieved: the second edge sealing portion intersects with the first edge sealing portion and the third edge sealing portion respectively, so that the second edge sealing portion is arranged at an oblique angle, and when the first edge sealing portion and the third edge sealing portion are bent, the second edge sealing portion realizes edge folding avoidance, thereby avoiding interference at the junction of the folded edges, reducing the difficulty of packaging, and facilitating the application of internal series connection technology.
[0007] According to some embodiments of the present invention, the second edge sealing portions are respectively connected to the opposite ends of the third edge sealing portion, each of the second edge sealing portions is respectively connected to the first edge sealing portion, and each of the first edge sealing portion, the second edge sealing portion and the third edge sealing portion surrounds the first accommodating cavity and the second accommodating cavity.
[0008] According to some embodiments of the present invention, the first edge sealing portion is provided with a first pre-folding line, and an extension line of the first pre-folding line intersects with a side line of the second edge sealing portion away from the first accommodating cavity;
[0009] And / or, the third edge sealing portion is provided with a second pre-folding line, and an extension line of the second pre-folding line intersects with a side line of the second edge sealing portion away from the first accommodating cavity.
[0010] According to some embodiments of the present invention, the packaging structure includes a first body, a second body and a partition, the first body, the partition and the second body are stacked in sequence along the first direction, a first accommodating cavity is defined between the first body and the partition, and a first accommodating cavity is defined between the second body and the partition.
[0011] According to some embodiments of the present invention, the first body is provided with a first accommodating groove, the second body is provided with a second accommodating groove, the partition member covers the first accommodating groove to define the first accommodating cavity, and the partition member covers the second accommodating groove to define the second accommodating cavity.
[0012] According to some embodiments of the present invention, the first body and the second body are connected to form an integral structure.
[0013] A battery according to an embodiment of the utility model includes a battery cell and a packaging structure of any of the above embodiments, the battery cell includes a first pole piece and a second pole piece, the first pole piece and the second pole piece have opposite polarities, the first accommodating cavity and the second accommodating cavity respectively accommodate the battery cell, and the first pole piece of the battery cell located in the first accommodating cavity is connected to the second pole piece of the battery cell located in the second accommodating cavity.
[0014] The battery according to the embodiment of the utility model has at least the following beneficial effects: by using the packaging structure of the embodiment of the present application, it is possible to facilitate folding on the basis of realizing the internal series connection of the battery cell, thereby reducing the difficulty of packaging.
[0015] According to some embodiments of the present invention, the first accommodating cavity forms a first projection on a plane along the first direction, the outer edge of the first projection has a first sideline, a second sideline and a third sideline connected in sequence, the first sideline is parallel to the extension direction of the first edge sealing portion, the second sideline is parallel to the extension direction of the second edge sealing portion, the third sideline is parallel to the extension direction of the third edge sealing portion, and the battery cell accommodated in the first accommodating cavity is arranged in a contour with the first accommodating cavity;
[0016] And / or, the second accommodating cavity forms a second projection on a plane along the first direction, and the outer edge of the second projection has a fourth side line, a fifth side line and a sixth side line connected in sequence, the fourth side line is parallel to the extension direction of the first edge sealing portion, the fifth side line is parallel to the extension direction of the second edge sealing portion, and the sixth side line is parallel to the extension direction of the third edge sealing portion, and the battery cell accommodated in the second accommodating cavity is arranged in the shape of the second accommodating cavity.
[0017] According to some embodiments of the utility model, the battery has a first side and a second side relative to each other in a direction perpendicular to the first direction, and the battery includes a pole ear, and the first pole sheet and the second pole sheet of the battery cell are respectively connected to the pole ears, the pole ears connected to each of the battery cells are located on the first side of the battery, and the second edge sealing portion and the third edge sealing portion are located on the second side of the battery.
[0018] According to some embodiments of the utility model, the battery includes pole ears, the first pole piece and the second pole piece of the battery cell are respectively connected to the pole ears, the pole ears of the same battery cell are staggered in the first direction, and / or the pole ears of multiple battery cells are staggered in the first direction.
[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:
[0021] Figure 1 A front view of the packaging structure of an embodiment of the utility model;
[0022] Figure 2 An exploded schematic diagram of the packaging structure of an embodiment of the utility model;
[0023] Figure 3 A cross-sectional view of the packaging structure of an embodiment of the utility model;
[0024] Figure 4 A schematic diagram of a battery according to an embodiment of the present utility model;
[0025] Figure 5 It is a partial schematic diagram of a battery according to an embodiment of the present utility model.
[0026] Reference numerals:
[0027] Packaging structure 10, battery cell 20, tab 30;
[0028] The first edge sealing portion 100 and the first pre-folding line 110; the second edge sealing portion 200; the third edge sealing portion 300 and the second pre-folding line 310;
[0029] The first body 400, the first receiving groove 410, the first receiving cavity 420, the first projection 430, the first sideline 431, the second sideline 432, and the third sideline 433;
[0030] The second body 500, the second receiving groove 510, and the second receiving cavity 520;
[0031] Partition 600. DETAILED DESCRIPTION
[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0033] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0034] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0036] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0037] The packaging structure and battery of the embodiment of the present application are described below with reference to the drawings in the specification. It should be noted that the first direction is shown in the front-to-back direction, the top and bottom directions of the battery are shown in the up-down direction, and the side direction of the battery is shown in the left-right direction.
[0038] Reference Figures 1 to 3 According to the packaging structure 10 of the embodiment of the utility model, the packaging structure 10 is provided with a first accommodating cavity 420 and a second accommodating cavity 520, the first accommodating cavity 420 and the second accommodating cavity 520 are arranged at intervals along the first direction, the first accommodating cavity 420 and the second accommodating cavity 520 are respectively used to accommodate the battery cell 20, the packaging structure 10 includes a first edge sealing portion 100, a second edge sealing portion 200 and a third edge sealing portion 300, the first edge sealing portion 100, the second edge sealing portion 200 and the third edge sealing portion 30 0 are respectively located outside the first accommodating cavity 420 and the second accommodating cavity 520 in a direction perpendicular to the first direction, the first edge sealing portion 100, the second edge sealing portion 200 and the third edge sealing portion 300 are connected in sequence, the first edge sealing portion 100, the second edge sealing portion 200 and the third edge sealing portion 300 have a set extension direction, the extension direction of the second edge sealing portion 200 intersects with the extension direction of the first edge sealing portion 100, and the extension direction of the second edge sealing portion 200 intersects with the extension direction of the third edge sealing portion 300. The second edge sealing portion 200 intersects with the first edge sealing portion 100 and the third edge sealing portion 300, respectively, so that the second edge sealing portion 200 is arranged at an oblique angle, and when the first edge sealing portion 100 and the third edge sealing portion 300 are bent, the second edge sealing portion 200 realizes the folding avoidance, avoids the interference at the folding junction, reduces the packaging difficulty, and facilitates the application of the internal series connection technology.
[0039] Specifically, the first edge seal 100, the second edge seal 200 and the third edge seal 300 are edge portions for sealing after the battery cell 20 is loaded into the first accommodation cavity 420 and the second accommodation cavity 520. The extension direction of the first edge seal 100, the extension direction of the second edge seal 200 and the extension direction of the third edge seal 300 are all perpendicular to the first direction. Since the second edge seal 200 intersects the first edge seal 100 and the third edge seal 300, it does not need to be bent, and only the first edge seal 100 and the third edge seal 300 need to be bent. Among them, the first edge seal 100 can be located at the side of the battery, the third edge seal 300 can be located at the bottom of the battery, and the second edge seal 200 is located at the corner position of the bottom of the battery. The first edge seal 100 and the second edge seal 200 can be arranged vertically.
[0040] Reference Figure 1 In some embodiments, the second edge sealing parts 200 are connected to the opposite ends of the third edge sealing part 300, and each second edge sealing part 200 is connected to the first edge sealing part 100, and each first edge sealing part 100, second edge sealing part 200 and third edge sealing part 300 surround the first accommodating cavity 420 and the second accommodating cavity 520. By surrounding the first accommodating cavity 420 and the second accommodating cavity 520 with the first edge sealing part 100, the second edge sealing part 200 and the third edge sealing part 300, the multi-side sealing of the first accommodating cavity 420 and the second accommodating cavity 520 can be achieved, and no folding interference will occur at both ends of the third edge sealing part 300 in the extension direction, further reducing the packaging difficulty.
[0041] Reference Figure 1 In some embodiments, the first edge sealing portion 100 is provided with a first pre-folding line 110, and the extension line of the first pre-folding line 110 intersects with the edge line of the second edge sealing portion 200 away from the first accommodating cavity 420 to ensure the avoidance effect formed by the oblique angle of the second edge sealing portion 200 to avoid corner interference when the first edge sealing portion 100 is bent.
[0042] Reference Figure 1 In some embodiments, the third edge sealing portion 300 is provided with a second pre-folding line 310, and the extension line of the second pre-folding line 310 intersects with the edge line of the second edge sealing portion 200 away from the first accommodating cavity 420 to ensure the avoidance effect formed by the oblique angle of the second edge sealing portion 200, thereby avoiding corner interference when the second edge sealing portion 200 is bent.
[0043] Reference Figure 2 and Figure 3In some embodiments, the packaging structure 10 includes a first body 400, a second body 500 and a separator 600, the first body 400, the separator 600 and the second body 500 are stacked in sequence along a first direction, a first accommodation cavity 420 is defined between the first body 400 and the separator 600, and a first accommodation cavity 420 is defined between the second body 500 and the separator 600. The first body 400 and the separator 600 cover and accommodate one of the battery cells 20, and the second body 500 and the separator 600 cover and accommodate another battery cell 20, thereby encapsulating the battery cells 20.
[0044] The first body 400, the second body 500 and the separator 600 can all be made of aluminum plastic film to achieve insulation and sealing. The first edge sealing part 100, the second edge sealing part 200 and the third edge sealing part 300 are composed of the first body 400, the second body 500 and the separator 600.
[0045] In some embodiments, the battery cell 20 is disposed between the first body 400 and the separator 600, and the first body 400 is deformed and protrudes under the action of the battery cell 20 to form a first accommodating cavity 420. The battery cell 20 is disposed between the second body 500 and the separator 600, and the second body 500 is deformed and protrudes under the action of the battery cell 20 to form a second accommodating cavity 520.
[0046] Or, refer to Figure 2 In other embodiments, the first body 400 is provided with a first receiving groove 410, the second body 500 is provided with a second receiving groove 510, the partition 600 covers the first receiving groove 410 to define a first receiving chamber 420, and the partition 600 covers the second receiving groove 510 to define a second receiving chamber 520. By pre-arranging the first receiving groove 410 on the first body 400, the shape of the first receiving chamber 420 can be set in advance, so that the first receiving chamber 420 is more matched with the shape of the battery cell 20, the limiting effect on the battery cell 20 is improved, the probability of slippage and vibration is reduced, and the packaging is stable. Similarly, by pre-arranging the second receiving groove 510 on the second body 500, the shape of the second receiving chamber 520 can be set in advance, so that the second receiving chamber 520 is more matched with the shape of the battery cell 20, the limiting effect on the battery cell 20 is improved, the probability of slippage and vibration is reduced, and the packaging is stable.
[0047] In some embodiments, the first body 400 and the second body 500 are separately arranged, and the first body 400 and the second body 500 are respectively connected to the separator 600 to respectively realize the packaging of the battery cell 20. In other embodiments, the first body 400 and the second body 500 are connected as an integral structure. When packaging, the entire film is folded to distinguish the first body 400 and the second body 500, and the separator 600 is aligned with the folding line. The integrated setting can simplify the process, and the position corresponding to the folding line does not need to be additionally sealed, and the subsequent folding is sufficient. Among them, in the embodiment where the first body 400 is provided with a first accommodating groove 410 and the second body 500 is provided with a second accommodating groove 510, the first accommodating groove 410 and the second accommodating groove 510 are symmetrically arranged with the folding line as the axis of symmetry so as to be aligned after folding.
[0048] Reference Figures 2 to 5 According to the battery of the embodiment of the utility model, the battery comprises a battery cell 20 and a packaging structure 10 of any of the above embodiments, the battery cell 20 comprises a first pole piece and a second pole piece, the first pole piece and the second pole piece have opposite polarities, the first accommodation cavity 420 and the second accommodation cavity 520 respectively accommodate the battery cell 20, and the first pole piece of the battery cell 20 located in the first accommodation cavity 420 is connected to the second pole piece of the battery cell 20 located in the second accommodation cavity 520. By using the packaging structure 10 of the embodiment of the present application, it is possible to facilitate folding on the basis of realizing the internal series connection of the battery cell 20, thereby reducing the difficulty of packaging.
[0049] Among them, the battery cell 20 in the present application can be a wound battery cell 20 or a stacked battery cell 20, and the first pole piece and the second pole piece are correspondingly arranged according to the prior art to form the battery cell 20.
[0050] Reference Figure 1 In some embodiments, the first accommodating cavity 420 forms a first projection 430 on a plane along a first direction, and the outer edge of the first projection 430 has a first side line 431, a second side line 432 and a third side line 433 connected in sequence, the first side line 431 is parallel to the extension direction of the first edge sealing portion 100, the second side line 432 is parallel to the extension direction of the second edge sealing portion 200, and the third side line 433 is parallel to the extension direction of the third edge sealing portion 300, and the battery cell 20 accommodated in the first accommodating cavity 420 is arranged in the shape of the first accommodating cavity 420. The outer edge contour of the first accommodating cavity 420 is contoured to the contour formed by the first edge sealing portion 100, the second edge sealing portion 200 and the third edge sealing portion 300, so that the accommodating space of the first accommodating cavity 420 can be increased as much as possible, and the battery cell 20 is contoured to the first accommodating cavity 420 to increase the energy density of the battery cell 20 as much as possible, and increase the coverage of the first body 400 to the battery cell 20 to ensure stable packaging.
[0051] Reference Figure 1 and Figure 2In some embodiments, the second accommodating cavity 520 forms a second projection on a plane along the first direction, and the outer edge of the second projection has a fourth sideline, a fifth sideline and a sixth sideline connected in sequence, the fourth sideline is parallel to the extension direction of the first edge sealing portion 100, the fifth sideline is parallel to the extension direction of the second edge sealing portion 200, and the sixth sideline is parallel to the extension direction of the third edge sealing portion 300, and the battery cell 20 accommodated in the second accommodating cavity 520 is arranged in a contour with the second accommodating cavity 520. The outer edge contour of the second accommodating cavity 520 is contoured with the contour formed by the first edge sealing portion 100, the second edge sealing portion 200 and the third edge sealing portion 300, so as to increase the accommodating space of the second accommodating cavity 520 as much as possible, and the battery cell 20 is arranged in a contour with the second accommodating cavity 520 to increase the energy density of the battery cell 20 as much as possible, and to increase the coverage of the battery cell 20 by the second body 500, so as to ensure the stability of the package.
[0052] The second accommodating cavity 520 and the first accommodating cavity 420 are Figure 1 The projection overlaps in this application only Figure 1 The projection of the first accommodating cavity 420 is marked in , and the projection of the second accommodating cavity 520 and the fourth sideline, the fifth sideline and the sixth sideline can refer to the projection of the first accommodating cavity 420 and the first sideline 431 , the second sideline 432 and the third sideline 433 .
[0053] Reference Figure 4 In some embodiments, the battery has a first side and a second side relative to each other in a direction perpendicular to the first direction, the battery includes a tab 30, the first pole piece and the second pole piece of the battery cell 20 are respectively connected to the tab 30, the tab 30 connected to each battery cell 20 is located on the first side of the battery, and the second edge sealing portion 200 and the third edge sealing portion 300 are located on the second side of the battery. The tabs 30 are all arranged on the same side of the battery, and the side of the packaging structure 10 facing the first side can be sealed by a conventional top sealing operation without folding. The second side of the packaging structure 10 and other sides surrounding the first accommodating cavity 420 and the second accommodating cavity 520 need to be sealed and folded. The interference caused by the folding operation is located at the junction of the corners of the packaging structure 10 facing the second side. The second edge sealing portion 200 is arranged on the second side of the battery to avoid the folding interference that occurs during folding.
[0054] Reference Figure 4 and Figure 5 In some embodiments, the battery includes a tab 30, and the first pole piece and the second pole piece of the battery cell 20 are respectively connected to the tab 30, and the tabs 30 of the same battery cell 20 are staggered in the first direction to facilitate subsequent external connection of the tab 30.
[0055] Reference Figure 4 and Figure 5In some embodiments, the tabs 30 of the plurality of battery cells 20 are staggered in the first direction to facilitate subsequent external connection of the tabs 30 .
[0056] The pole tabs 30 are staggered in the first direction, which can be understood as the projections of the pole tabs 30 formed on the same plane along the first direction do not overlap, that is, the projections are arranged at intervals or only the projection edges overlap.
[0057] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.
Claims
1. A packaging structure, characterized in that: The packaging structure is provided with a first accommodating cavity and a second accommodating cavity, the first accommodating cavity and the second accommodating cavity are arranged at intervals along a first direction, the first accommodating cavity and the second accommodating cavity are respectively used to accommodate battery cells, the packaging structure includes a first edge sealing portion, a second edge sealing portion and a third edge sealing portion, the first edge sealing portion, the second edge sealing portion and the third edge sealing portion are respectively located on the outer sides of the first accommodating cavity and the second accommodating cavity perpendicular to the first direction, the first edge sealing portion, the second edge sealing portion and the third edge sealing portion are connected in sequence, the first edge sealing portion, the second edge sealing portion and the third edge sealing portion have a set extension direction, the extension direction of the second edge sealing portion intersects with the extension direction of the first edge sealing portion, and the extension direction of the second edge sealing portion intersects with the extension direction of the third edge sealing portion.
2. The packaging structure according to claim 1, characterized in that: The second edge sealing parts are respectively connected to the opposite ends of the third edge sealing part, each of the second edge sealing parts is respectively connected to the first edge sealing part, and each of the first edge sealing part, the second edge sealing part and the third edge sealing part surround the first accommodating cavity and the second accommodating cavity.
3. The packaging structure according to claim 1, characterized in that: The first edge sealing portion is provided with a first pre-folding line, and an extension line of the first pre-folding line intersects with a side line of the second edge sealing portion away from the first accommodating cavity; And / or, the third edge sealing portion is provided with a second pre-folding line, and an extension line of the second pre-folding line intersects with a side line of the second edge sealing portion away from the first accommodating cavity.
4. The packaging structure according to claim 1, characterized in that: It includes a first body, a second body and a separator, wherein the first body, the separator and the second body are stacked in sequence along the first direction, a first accommodating cavity is defined between the first body and the separator, and a first accommodating cavity is defined between the second body and the separator.
5. The packaging structure according to claim 4, characterized in that: The first body is provided with a first accommodating groove, the second body is provided with a second accommodating groove, the partition member covers the first accommodating groove to define the first accommodating cavity, and the partition member covers the second accommodating groove to define the second accommodating cavity.
6. The packaging structure according to claim 4 or 5, characterized in that: The first body and the second body are connected to form an integral structure.
7. A battery, characterized in that It includes a battery cell and a packaging structure as described in any one of claims 1 to 6, the battery cell includes a first pole piece and a second pole piece, the first pole piece and the second pole piece have opposite polarities, the first accommodating cavity and the second accommodating cavity respectively accommodate the battery cell, and the first pole piece of the battery cell located in the first accommodating cavity is connected to the second pole piece of the battery cell located in the second accommodating cavity.
8. The battery according to claim 7, characterized in that The first accommodating cavity forms a first projection on a plane along the first direction, and the outer edge of the first projection has a first sideline, a second sideline and a third sideline connected in sequence, the first sideline is parallel to the extension direction of the first edge sealing portion, the second sideline is parallel to the extension direction of the second edge sealing portion, and the third sideline is parallel to the extension direction of the third edge sealing portion, and the battery cell accommodated in the first accommodating cavity is arranged in the shape of the first accommodating cavity; And / or, the second accommodating cavity forms a second projection on a plane along the first direction, and the outer edge of the second projection has a fourth side line, a fifth side line and a sixth side line connected in sequence, the fourth side line is parallel to the extension direction of the first edge sealing portion, the fifth side line is parallel to the extension direction of the second edge sealing portion, and the sixth side line is parallel to the extension direction of the third edge sealing portion, and the battery cell accommodated in the second accommodating cavity is arranged in the shape of the second accommodating cavity.
9. The battery according to claim 7, characterized in that The battery has a first side and a second side opposite to each other in a direction perpendicular to the first direction, and the battery includes pole ears, and the first pole sheet and the second pole sheet of the battery cell are respectively connected to the pole ears, and the pole ears connected to each of the battery cells are located on the first side of the battery, and the second edge sealing portion and the third edge sealing portion are located on the second side of the battery.
10. The battery according to claim 7, characterized in that The battery includes pole tabs, the first pole piece and the second pole piece of the battery cell are respectively connected to the pole tabs, the pole tabs of the same battery cell are staggered in the first direction, and / or the pole tabs of multiple battery cells are staggered in the first direction.