Battery packaging structure and soft package battery

Abstract

The utility model relates to a battery packaging structure and a soft package battery. The battery packaging structure comprises a battery cell and a pair of side sealing edges, the battery cell comprises a top surface, a bottom surface, a pair of tabs and an annular side surface, the side surface is respectively connected with the top surface and the bottom surface, the two tabs are positioned on the top surface, and the side surface is provided with a front end surface vertical to the thickness direction of the battery cell; the two side sealing edges are respectively positioned on two opposite sides of the battery cell, the side sealing edges are bent from one end of the battery cell in the width direction to the front end surface, and the tabs and the side sealing edges are overlapped in the thickness direction of the battery cell. According to the scheme provided by the invention, the battery cell and the side sealing edge can adapt to the shape of the battery compartment of the electric appliance shell, the space utilization rate of the battery compartment is improved, and the battery energy density is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery packaging structure and a soft-pack battery. Background Art

[0002] At present, the packaging form of the common soft-pack batteries on the market generally consists of a top seal and two side seals. Batteries with this packaging form are widely used in various electrical appliances. In order to prevent the side film seals of the battery from warping up and causing inconsistent external dimensions of multiple batteries, the side seals usually need to be folded.

[0003] With the development of soft-pack battery technology, customers have higher and higher requirements for the energy density of soft-pack batteries, and the size design is becoming more and more extreme. Although the side seals can protect the battery cells, they will occupy part of the volume of the soft-pack battery, indirectly affecting the capacity of the soft-pack battery. Therefore, under the premise of ensuring that the side seals can protect the battery cells, making the side seals adapt to the shape of the battery compartment of the appliance casing and increasing the battery cell capacity has become a difficult problem. Utility Model Content

[0004] In order to solve or partially solve the problems existing in the related art, the present application provides a battery packaging structure and a soft-pack battery, which can make the battery cells and side sealing edges adapt to the shape of the battery compartment of the electrical appliance casing, improve the space utilization of the battery compartment, and increase the battery energy density.

[0005] A first aspect of the present application provides a battery packaging structure, which includes a battery cell and a pair of side seals; the battery cell includes a top surface, a bottom surface, a pair of tabs and annular side surfaces, the side surfaces are respectively connected to the top surface and the bottom surface, the two tabs are located on the top surface, and the side surfaces have a front end surface perpendicular to the thickness direction of the battery cell; the two side seals are respectively located on opposite sides of the battery cell, the side seals are bent from one end in the width direction of the battery cell to the front end surface, and the tabs and the side seals overlap in the thickness direction of the battery cell.

[0006] Furthermore, the side seal protrudes from the top surface in the length direction of the battery core.

[0007] Furthermore, the tab exceeds the side seal in the length direction of the battery cell.

[0008] Furthermore, the side surface has two side end surfaces on opposite sides of the front end surface, and the side edge seal covers at least half of the area of ​​the side end surfaces.

[0009] Furthermore, the connection between the side end surface and the front end surface is a curved surface.

[0010] Furthermore, the side end surface is a curved surface.

[0011] Furthermore, the distance between the two side seals is less than half the width of the battery cell.

[0012] Furthermore, one end of the side seal away from the tab is flush with the bottom surface.

[0013] Furthermore, the side edge seal has a thickness of 120 to 160 μm.

[0014] A second aspect of the present application provides a soft-pack battery, which includes the battery packaging structure.

[0015] The technical solution provided by the present application may include the following beneficial effects: by arranging the side seals on opposite sides of the battery cell, the side seals extend from one end in the width direction of the battery cell to the front end face, so that the tabs and the side seals partially overlap in the thickness direction of the battery cell, and a gap is left between the two side seals, so that the protrusions on the battery compartment can extend into the gap, so that the side seals and the shapes of the battery cell and the battery compartment are more adapted, and while protecting the battery cell, the side seals can extend to the space between the battery compartment and the battery cell, reducing the influence of the side seals on the thickness of the battery cell, thereby reducing the influence of the side seals on the volume and capacity of the battery cell.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0018] Figure 1 1 is a schematic structural diagram of a battery packaging structure shown in an embodiment of the present application;

[0019] Figure 2 is a side view of a battery packaging structure shown in an embodiment of the present application;

[0020] Figure 3 This is a schematic diagram of the battery packaging structure in the battery compartment shown in an embodiment of the present application.

[0021] Reference numerals: battery cell 1 ; bottom surface 11 ; tab 12 ; side surface 13 ; front end surface 131 ; side end surface 132 ; side sealing edge 2 ; housing 3 ; bump 31 . DETAILED DESCRIPTION

[0022] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0023] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 this application.

[0025] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," and the like should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0026] In response to the above problems, the embodiments of the present application provide a battery packaging structure and a soft-pack battery, which can adapt the battery cells and side sealing edges to the shape of the battery compartment of the electrical appliance casing, improve the space utilization of the battery compartment, and increase the battery energy density.

[0027] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0028] Figure 1 1 is a schematic structural diagram of a battery packaging structure shown in an embodiment of the present application; Figure 3 This is a schematic diagram of the battery packaging structure in the battery compartment shown in an embodiment of the present application.

[0029] See also Figure 1 and Figure 3 The battery packaging structure includes a battery cell 1 and a pair of side seals 2. The battery cell 1 includes a top surface, a bottom surface 11, a pair of tabs 12, and an annular side surface 13. The side surface 13 is connected to the top and bottom surfaces 11 respectively, wherein the top surface, bottom surface 11, and annular side surface 13 together form an aluminum-plastic shell. The two tabs 12 are located on the top surface and extend outward from the top surface of the aluminum-plastic shell. The cross-section of the battery cell 1 can be waist-shaped, diamond-shaped, rectangular, cylindrical, or elliptical.

[0030] See also Figure 1 The side surface 13 has a front end surface 131 perpendicular to the thickness direction of the battery cell 1. The front end surface 131 is connected to the ground and the top surface respectively, and the front end surface 131 is parallel to the two tabs 12. The two side seals 2 are respectively located on opposite sides of the battery cell 1. Specifically, the two side seals 2 are respectively located on opposite sides of the central axis of the front end surface 131. The side seal 2 is connected to one end of the battery cell 1 in the width direction. The side seal 2 is integrally formed with the aluminum-plastic shell. The side seal 2 is bent from one end of the battery cell 1 in the width direction to the front end surface 131. In some embodiments, the side seal 2 can be partially attached to the front end surface 131. Specifically, the side seal 2 can be attached to the front end surface 131 by glue. In some embodiments, a gap can be left between the side seal 2 and the front end surface 131. The projection of the tab 12 in the thickness direction of the battery cell 1 partially overlaps with the projection of the side seal 2 in the thickness direction of the battery cell 1. Since a protrusion 31 is usually provided in the battery compartment, a detection element for detecting the status of the battery cell 1 can be set in the protrusion 31. By bending the front end face 131 of the side seal 2 and making the projection of the tab 12 in the thickness direction of the battery cell 1 partially overlap with the projection of the side seal 2 in the thickness direction of the battery cell 1, after the battery cell 1 is installed in the battery compartment, the gap between the side seal 2 and the protrusion 31 is less than 1 mm, and the side seal 2 can be mutually buckled with the protrusion 31. When the battery cell 1 shakes relative to the battery compartment, the protrusion 31 can block the side seal 2, thereby reducing the amplitude of the shaking of the battery cell 1 and ensuring the safety of the battery cell 1 usage environment.

[0031] The present application arranges the side seals 2 on opposite sides of the battery cell 1 so that the side seals 2 extend from one end in the width direction of the battery cell 1 to the front end surface 131, so that the tabs 12 and the side seals 2 partially overlap in the thickness direction of the battery cell 1, and a gap is left between the two side seals 2, so that the protrusions 31 on the battery compartment can extend into the gap, so that the side seals 2 and the battery cell 1 are more adapted to the shape of the battery compartment. While protecting the battery cell 1, the side seals 2 can extend to the space between the battery compartment and the battery cell 1, reducing the influence of the side seals 2 on the thickness of the battery cell 1, thereby reducing the influence of the side seals 2 on the volume and capacity of the battery cell 1.

[0032] Figure 2 It is a side view of the battery packaging structure shown in an embodiment of the present application.

[0033] See also Figure 2-3 In some embodiments, the side seal 2 is longer than the length of the battery cell 1 and protrudes from the top surface in the lengthwise direction of the battery cell 1. The side seal 2 has a curved surface, forming a stepped structure with the top surface that matches the stepped structure of the battery compartment in the appliance housing 3. This increases the stability of the battery cell 1 within the appliance housing 3 and prevents the battery cell 1 from shaking relative to the battery compartment during use. The tab 12 extends beyond the side seal 2 in the lengthwise direction of the battery cell 1, ensuring that the tab 12 is long enough to electrically connect to the positive and negative electrodes on the appliance housing 3, preventing the side seal 2 from interfering with the connection between the tab 12 and the positive and negative electrodes.

[0034] See also Figure 2-3 , the side surface 13 has two side end surfaces 132 on opposite sides of the front end surface 131, and the side edge seal 2 covers at least half of the area of ​​the side end surface 132. Preferably, the side edge seal 2 covers half of the area of ​​the side end surface 132, ensuring that the side edge seal 2 and the side end surface 132 can be firmly connected together, and ensuring that the side edge seal 2 provides sufficient protection for the side surface 13 of the battery cell 1. The connection between the side end surface 132 and the front end surface 131 is an arc surface, so that the battery cell 1 can match the battery compartment of the electrical appliance housing 3, improve the space utilization of the electrical appliance housing 3, and indirectly improve the energy density of the battery cell 1. In some embodiments, the cross-section of the battery cell 1 is waist-shaped, and the entire side end surface 132 is an arc surface. The side edge seal 2 needs to cover one end of the battery cell 1 in the width direction, so as to ensure that the side edge seal 2 provides sufficient protection for the battery cell 1. In some embodiments, the connection between the side end surface 132 and the front end surface 131 is an arc surface, the middle of the side end surface 132 can be a plane, and the side sealing edge 2 covers at least the middle part of the plane of the side end surface 132, thereby ensuring that the side sealing edge 2 provides sufficient protection for the battery cell 1.

[0035] See also Figure 1-3 The distance between the two side seals 2 is less than half the width of the battery cell 1, ensuring that the side seals 2 have sufficient coverage of the front face 131, thereby better protecting the battery cell 1. The end of the side seal 2 away from the tab 12 is flush with the bottom surface 11, ensuring that the bottom of the battery cell 1 is flat and preventing the end of the side seal 2 close to the bottom surface 11 from scratching the battery compartment when the battery cell 1 is installed in the battery compartment of the electrical appliance housing 3.

[0036] See also Figure 2-3 The thickness of the side seal 2 is 120-160 μm. Since the thickness of the side seal 2 will affect the overall thickness of the soft-pack battery, and the side seal 2 is too thin, it cannot provide good protection for the battery cell 1. By controlling the thickness of the side seal 2 to 120-160 μm, the side seal 2 can take into account the protection of the battery cell 1 and increase the capacity of the battery cell 1.

[0037] Corresponding to the aforementioned embodiment of the application function implementation device, the present application also provides a soft-pack battery, which includes a battery packaging structure.

[0038] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the description are not necessarily required for this application. In addition, it is understood that the steps in the method of the embodiment of the present application can be adjusted in sequence, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0039] The embodiments of the present application have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A battery packaging structure, characterized in that: include: A battery cell (1), the battery cell (1) comprising a top surface, a bottom surface (11), a pair of tabs (12) and an annular side surface (13), the side surface (13) being connected to the top surface and the bottom surface (11) respectively, the two tabs (12) being located on the top surface, and the side surface (13) having a front end surface (131) perpendicular to the thickness direction of the battery cell (1); A pair of side seals (2), the two side seals (2) being located on opposite sides of the battery cell (1), the side seals (2) being bent from one end in the width direction of the battery cell (1) toward the front end face (131), and the tabs (12) and the side seals (2) being overlapped in the thickness direction of the battery cell (1).

2. The battery packaging structure according to claim 1, wherein: The side sealing edge (2) protrudes from the top surface in the length direction of the battery core (1).

3. The battery packaging structure according to claim 1, wherein: The tab (12) exceeds the side sealing edge (2) in the length direction of the battery core (1).

4. The battery packaging structure according to claim 1, wherein: The side surface (13) has two side end surfaces (132) on opposite sides of the front end surface (131), and the side edge seal (2) covers at least half of the area of ​​the side end surfaces (132).

5. The battery packaging structure according to claim 4, characterized in that: The connection between the side end surface (132) and the front end surface (131) is a curved surface.

6. The battery packaging structure according to claim 5, characterized in that: The side end surface (132) is a curved surface.

7. The battery packaging structure according to claim 1, wherein: The distance between the two side sealing edges (2) is less than half the width of the battery core (1).

8. The battery packaging structure according to claim 1, wherein: One end of the side sealing edge (2) away from the tab (12) is flush with the bottom surface (11).

9. The battery packaging structure according to claim 1, wherein: The side sealing edge (2) has a thickness of 120 to 160 μm.

10. A soft pack battery, characterized in that: A battery packaging structure comprising the battery packaging structure according to any one of claims 1 to 9.

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