CN219937099U

CN219937099U - Polymer lithium battery corner seal head

Info

Publication number: CN219937099U
Application number: CN202320786038.0U
Authority: CN
Inventors: 汪敏; 曹礼; 钟欣; 李雄成
Original assignee: Hunan Lifang New Energy Science and Technology Co Ltd
Current assignee: Hunan Lifang New Energy Science and Technology Co Ltd
Priority date: 2023-04-11
Filing date: 2023-04-11
Publication date: 2023-10-31
Anticipated expiration: 2033-04-11

Abstract

The utility model relates to the technical field of battery packaging, in particular to a corner sealing head of a polymer lithium battery, which comprises a packaging part and a mounting part fixedly connected with the packaging part, wherein one end of the packaging part is connected with the mounting part, and the other end of the packaging part is provided with a protruding part. According to the utility model, the protruding part is arranged on the corner sealing head, so that the overlapping edge area of the battery core is not protruded during secondary packaging of the corner sealing head, the phenomenon of extruding glue and protruding of the battery core is completely avoided, and the quality and reliability of a product are improved.

Description

Polymer lithium battery corner seal head

Technical Field

The utility model relates to the technical field of battery packaging, in particular to a corner sealing head of a polymer lithium battery.

Background

With the wider and wider application of electronic devices, people cannot leave the electronic devices in production and life, so that the electronic devices are more and more, and the batteries of the electronic devices are worth focusing on.

The current corner seal packaging technology in the soft package industry of the lithium ion battery uses a linear flat seal head mode, and glue overflow gaps are formed at the folding position and the juncture of the aluminum plastic film when the corner seal of the battery core exists, so that the corner seal at the bottom of the battery core is easy to be excessively melted or over-pressed to cause the corner seal to leak aluminum.

Disclosure of Invention

The utility model aims at: aiming at the defects of the prior art, the polymer lithium battery corner sealing head is provided, the head can avoid the situation that the battery cell is heated and pressed by glue overflow extrusion after side sealing, and the battery cell is damaged after edge folding, thereby improving the product quality.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a polymer lithium cell angle seal head, includes encapsulation portion and with the fixed installation department that links to each other of encapsulation portion, the one end of encapsulation portion with installation department is connected, the other end of encapsulation portion is provided with the bulge has a plurality of bumps, a plurality of the bump set up in the other end of encapsulation portion.

As an improvement of the corner sealing head of the polymer lithium battery, when the cross section of each salient point is round, the intervals among the salient points are equal, and the salient points account for 40-80% of the area of the protruding part.

As an improvement of the corner sealing head of the polymer lithium battery, when the protruding points are in a quadrangular shape, the upper surface area of the protruding points is smaller than the lower surface area, and no gaps exist between the protruding points and are closely distributed on the protruding parts.

As an improvement of the corner sealing head of the polymer lithium battery, the mounting part is provided with a mounting hole, and the mounting hole penetrates through the mounting part.

As an improvement of the polymer lithium battery corner sealing head, a ring part is arranged in the mounting hole, and the ring part is arranged in the middle position inside the mounting hole.

As an improvement of the corner sealing head of the polymer lithium battery, the sealing part consists of two sealing bodies, and the two sealing bodies are crossed to form a cross shape.

As an improvement of the corner sealing head of the polymer lithium battery, circular arcs are arranged on the periphery of the mutually perpendicular positions between the two sealing bodies.

As an improvement of the corner sealing head of the polymer lithium battery, four circular arcs are arranged, and the circle centers of the circular arcs are far away from the intersection of the two packaging bodies.

The packaging structure has the beneficial effects that the packaging structure comprises the packaging part and the mounting part fixedly connected with the packaging part, one end of the packaging part is connected with the mounting part, the other end of the packaging part is provided with the protruding part, the protruding part is provided with a plurality of protruding points, and the protruding points are arranged at the other end of the packaging part. Most of the common angle seal heads in the prior art are linear type flat heads, when the side seal is packaged, the angle seal needs to be carried out, after the side seal, the aluminum plastic film PP glue and the seal head face are subjected to compression and heated and fused to complete the package, when the side seal is heated and pressed, the aluminum plastic film PP glue deforms to cause overflow, when the angle seal is carried out, the aluminum plastic film also needs to be subjected to compression and heated and fused to complete the package, the aluminum plastic film PP glue also deforms to cause overflow, after the two times of superposition, the protrusion after the extrusion of the PP glue is formed, and the corner seal at the bottom of the battery cell is over-melted or over-pressed to cause failure conditions such as aluminum leakage, breakage and the like of the angle seal. The end part of the end socket is provided with the protruding part, the protruding part mainly acts on the overlapping area of the end socket and the side seal, so that glue overflow and glue extrusion are reduced and eliminated, when the secondary packaging and the side seal are overlapped, the aluminum plastic film PP glue cannot be formed into a protruding shape due to temperature and pressure, the situation that the corner seal at the bottom of the battery cell is excessively melted or the corner seal is excessively melted or damaged to fail due to the fact that the corner seal is excessively melted is avoided, and the quality and the reliability of the product are improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

fig. 1 is one of schematic structural diagrams of embodiment 1 of the present utility model;

FIG. 2 is a second schematic structural diagram of embodiment 1 of the present utility model;

fig. 3 is one of the structural schematic diagrams of embodiment 2 of the present utility model;

FIG. 4 is a second schematic structural diagram of embodiment 2 of the present utility model;

1. a packaging part; 11. a package; 12. arc; 2. a mounting part; 21. a mounting hole; 211. a ring portion; 3. a protruding portion; 31. and (5) protruding points.

Detailed Description

Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art can solve the technical problem within a certain error range, substantially achieving the technical effect.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The present utility model will be described in further detail below with reference to the drawings, but is not limited thereto.

Embodiment 1

As shown in fig. 1-2, a corner sealing head of a polymer lithium battery comprises a packaging part 1 and a mounting part 2 fixedly connected with the packaging part 1, wherein one end of the packaging part 1 is connected with the mounting part 2, the other end of the packaging part 1 is provided with a protruding part 3, the protruding part 3 is provided with a plurality of protruding points 31, and the protruding points 31 are arranged at the other end of the packaging part 1. In practical application, the four end sockets are in a group and are respectively positioned at four corners of the soft package battery cell for fixing the battery cell.

The cross section of bump 31 is circular, and the interval between a plurality of bumps 31 is equal, and a plurality of bumps 31 account for 40% -80% of bulge 3 area, and bulge 3 is located the coincidence region of side seal and angle seal both sides encapsulation, and the setting of a plurality of bumps 31 can make the condition of crowded glue in coincidence region, overflow glue reduce and eliminate, avoid forming the arch after the glue extrusion, prevent that the angle seal of electric core bottom from sealing the emergence of inefficacy condition such as melting or damage leading to angle seal aluminium leakage, damage, ensured the angle seal quality, improve electric core quality.

The packaging part 1 is composed of two packaging bodies 11, the two packaging bodies 11 are crossed to form a cross shape, circular arcs 12 are arranged on the periphery of the mutually perpendicular positions between the two packaging bodies 11, the circular arcs 12 are four, and the circle center of each circular arc 12 is far away from the crossing position of the two packaging bodies 11. The arrangement of the circular arc 12 increases the smoothness of the packaging part 1, so that the packaging is convenient; the structure of the packaging part 1 is effectively arranged, and the battery is packaged by the end enclosure.

The mounting part 2 is provided with a mounting hole 21, the mounting hole 21 penetrates through the mounting part 2, a ring part 211 is arranged in the mounting hole 21, and the ring part 211 is arranged at the middle position in the mounting hole 21; the arrangement of the ring part 211 can increase the connection strength, obtain better encapsulation effect, and the installation part 2 is installed on the encapsulation arrangement through the installation hole 21, so that the installation of the sealing head is effectively realized.

Embodiment 2

As shown in fig. 3 to 4, the difference from embodiment 1 is that: in this embodiment, the bumps 31 are in the shape of a quadrangular prism, the upper surface area of the bumps 31 is smaller than the lower surface area, and no space exists between the bumps 31, and the bumps are closely arranged on the protruding portion 3. Although the structure of the bump 31 in the present embodiment is more complicated than that in embodiment 1, it can suppress formation of PP bumps more effectively.

Other structures are the same as those of embodiment 1, and will not be described here again.

While the foregoing description illustrates and describes several preferred embodiments of the present utility model, it is to be understood that the utility model is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, and is capable of numerous other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept herein, either as a result of the foregoing teachings or as a result of the knowledge or skills of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.

Claims

1. The utility model provides a polymer lithium cell angle seal head which characterized in that: the packaging structure comprises a packaging part (1) and a mounting part (2) fixedly connected with the packaging part (1), wherein one end of the packaging part (1) is connected with the mounting part (2), and a protruding part (3) is arranged at the other end of the packaging part (1); the protruding part (3) is provided with a plurality of protruding points (31), and the protruding points (31) are arranged at the other end of the packaging part (1).

2. The polymeric lithium battery corner seal head of claim 1, wherein: the cross section of each bump (31) is circular, and the intervals among a plurality of bumps (31) are equal.

3. The corner seal head of a polymer lithium battery according to claim 2, wherein a plurality of the protruding points (31) occupy 40% -80% of the area of the protruding portion (3).

4. The polymeric lithium battery corner seal head of claim 1, wherein: the bump (31) is in a quadrangular prism shape, and the upper surface area of the bump (31) is smaller than the lower surface area.

5. The polymeric lithium battery corner seal head of claim 4, wherein: no gaps exist between the convex points (31), and the convex points are closely arranged on the convex parts (3).

6. The polymeric lithium battery corner seal head of claim 1, wherein: the mounting part (2) is provided with a mounting hole (21), and the mounting hole (21) penetrates through the mounting part (2).

7. The polymeric lithium battery corner seal head of claim 6, wherein: a ring part (211) is arranged in the mounting hole (21), and the ring part (211) is arranged at the middle position inside the mounting hole (21).

8. The polymeric lithium battery corner seal head of claim 1, wherein: the packaging part (1) is composed of two packaging bodies (11), and the two packaging bodies (11) are crossed to form a cross shape.

9. The polymeric lithium battery corner seal head of claim 8, wherein: circular arcs (12) are arranged on the periphery of the mutually perpendicular positions between the two packaging bodies (11).

10. The polymeric lithium battery corner seal head of claim 9, wherein: the number of the circular arcs (12) is four, and the circle center of the circular arcs (12) is far away from the intersection of the two packaging bodies (11).