CN214411280U

CN214411280U - Battery edge sealing structure and lithium ion battery

Info

Publication number: CN214411280U
Application number: CN202022777097.0U
Authority: CN
Inventors: 李峥; 何泓材; 李胜前; 冯玉川
Original assignee: Suzhou Qingtao New Energy S&T Co Ltd
Current assignee: Suzhou Qingtao New Energy S&T Co Ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-10-15
Anticipated expiration: 2030-11-26

Abstract

The utility model belongs to the technical field of lithium ion battery, a battery banding structure and lithium ion battery is specifically disclosed. The battery edge sealing structure comprises an inner edge folding structure and an outer edge folding structure, wherein the inner edge folding structure is connected with the outer edge folding structure. This battery banding structure adopts interior hem structure and the mode that outer hem structure combined together, through increasing effective encapsulation width, effectively improves the encapsulation intensity of plastic-aluminum membrane. The utility model provides a lithium ion battery, including battery body and the first banding, the second banding that are located the battery body both sides, at least one in first banding and the second banding adopts foretell battery banding structure. Due to the adoption of the battery edge sealing structure, the lithium ion battery has high packaging strength, and can effectively avoid the occurrence of liquid leakage of the battery, thereby ensuring the quality of the battery and improving the use safety of the battery.

Description

Battery edge sealing structure and lithium ion battery

Technical Field

The utility model relates to a lithium ion battery technical field especially relates to a battery banding structure and lithium ion battery.

Background

The secondary banding is needed after the current lithium battery is sealed, and because the secondary banding belongs to the encapsulation of battery after annotating the liquid, encapsulation intensity is less than side banding and top banding far away, leads to appearing weeping easily and hot box test opening scheduling problem. The traditional secondary edge sealing usually adopts an inner edge folding structure or an outer edge folding structure, the inner edge folding structure can effectively improve the packaging performance, but when the battery is thinner, the effective edge sealing strength can not be achieved, and liquid leakage is easily caused; the outer hem structure also has the problems of low edge sealing strength and low edge sealing efficiency.

Therefore, it is desirable to provide a battery edge sealing structure and a lithium ion battery to solve the above technical problems in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery banding structure, this battery banding structure's battery encapsulation intensity is high.

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

a battery edge sealing structure comprising:

the inner folding edge structure is connected with the outer folding edge structure.

As a preferred technical solution of the above-mentioned battery edge sealing structure, the outer folding edge structure includes a first outer folding edge and a second outer folding edge, the inner folding edge structure includes a first inner folding edge, and the first outer folding edge, the second outer folding edge and the first inner folding edge are sequentially connected by bending.

As a preferable technical solution of the above battery edge sealing structure, the width of the first outer folded edge, the width of the second outer folded edge and the width of the first inner folded edge are equal.

As a preferred technical solution of the above-mentioned battery edge sealing structure, the outer folding structure includes a third outer folding edge and a fourth outer folding edge, the inner folding structure includes a second inner folding edge, and the third outer folding edge, the second inner folding edge and the fourth outer folding edge are sequentially connected by bending.

As a preferable technical scheme of the above battery edge sealing structure, the width of the second inner folded edge is 45% -55% of the width of the third outer folded edge, and the width of the fourth outer folded edge is 45% -55% of the width of the second inner folded edge.

As a preferred technical solution of the above-mentioned battery edge sealing structure, the outer folding structure includes a fifth outer folding edge, the inner folding structure includes a third inner folding edge, and the fifth outer folding edge and the third inner folding edge are sequentially connected by bending.

As a preferable technical scheme of the above battery edge sealing structure, the width of the third inner folded edge is 45% -55% of the width of the fifth outer folded edge.

As a preferable technical scheme of the battery edge sealing structure, the width of the battery edge sealing structure is 6mm-12 mm.

Another object of the present invention is to provide a lithium ion battery, which has high packaging strength.

the utility model provides a lithium ion battery, includes the battery body the first banding of battery body one side with the second banding of battery body opposite side, first banding with at least one in the second banding adopts above arbitrary technical scheme battery banding structure.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model provides a battery edge banding structure, including the interior hem structure and the outer hem structure that are connected, the mode that hem structure and outer hem structure combined together in this battery edge banding structure adopted, through increasing effective encapsulation width, effectively improves the encapsulation intensity of plastic-aluminum membrane.

The utility model provides a lithium ion battery, including battery body and the first banding, the second banding that are located the battery body both sides, at least one in first banding and the second banding adopts foretell battery banding structure. Due to the adoption of the battery edge sealing structure, the lithium ion battery has high packaging strength, and can effectively avoid the occurrence of liquid leakage of the battery, thereby ensuring the quality of the battery and improving the use safety of the battery.

Drawings

Fig. 1 is a schematic structural view of a first battery edge sealing structure according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a second battery edge sealing structure according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a third battery edge sealing structure according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a first lithium ion battery according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a second lithium ion battery according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a third lithium ion battery according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a fourth lithium ion battery according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a fifth lithium ion battery according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a sixth lithium ion battery according to an embodiment of the present invention.

The figures are labeled as follows:

1-a first outer fold; 2-second outer folded edge; 3-first inner folded edge; 4-third outer folding; 5-second inner folded edge; 6-fourth outer folding edge; 7-fifth outer folding edge; 8-third inner folding;

10. a battery body; 20. battery banding structure.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplicity of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The present embodiment discloses a battery edge sealing structure 20, as shown in fig. 1 to 3, the battery edge sealing structure 20 includes an inner folding structure and an outer folding structure, and the inner folding structure is connected to the outer folding structure. Different from the simple interior hem structure or the outer hem structure that adopts of prior art, the mode that hem structure and outer hem structure combined together is adopted to battery banding structure 20 of this embodiment, through increasing effective encapsulation width, effectively improves the encapsulation intensity of plastic-aluminum membrane to the encapsulation intensity of battery has been improved.

Optionally, as shown in fig. 1, the outer folding edge structure includes a first outer folding edge 1 and a second outer folding edge 2, the inner folding edge structure includes a first inner folding edge 3, and the first outer folding edge 1, the second outer folding edge 2 and the first inner folding edge 3 are sequentially connected in a bending manner.

Preferably, the width of the first outer fold 1, the width of the second outer fold 2 and the width of the first inner fold 3 are equal.

Further preferably, the width of the battery edge sealing structure 20 is 6 mm.

Optionally, as shown in fig. 2, the outer folding edge structure includes a third outer folding edge 4 and a fourth outer folding edge 6, the inner folding edge structure includes a second inner folding edge 5, and the third outer folding edge 4, the second inner folding edge 5 and the fourth outer folding edge 6 are connected in turn in a bending manner.

Preferably, the width of the second inner fold 5 is 45% -55%, preferably 50%, of the width of the third outer fold 4, and the width of the fourth outer fold 6 is 45% -55%, preferably 50%, of the width of the second inner fold 5.

Further preferably, the width of the battery edge sealing structure 20 is 12 mm.

Optionally, as shown in fig. 3, the outer folding edge structure includes a fifth outer folding edge 7, the inner folding edge structure includes a third inner folding edge 8, and the fifth outer folding edge 7 and the third inner folding edge 8 are sequentially connected in a bending manner.

Preferably, the width of the third inner fold 8 is 45% -55%, preferably 50%, of the width of the fifth outer fold 7.

The width of the battery edge sealing structure 20 in this embodiment is 6mm-12 mm. The specific values depend on the specific structure of the battery edge sealing structure 20, and are not listed in this embodiment.

It should be noted that, the bending methods of the outer folded edge and the inner folded edge are all the prior art, and are not described in detail in this embodiment.

The embodiment also discloses a lithium ion battery, including battery body 10, first banding and second banding, first banding sets up in one side of battery body 10, and the second banding sets up in the opposite side of battery body 10, and at least one in first banding and the second banding adopts as above battery banding structure 20 among any technical scheme. Due to the adoption of the battery edge sealing structure 20, the lithium ion battery has high packaging strength, can effectively avoid the leakage of the battery, ensures the quality of the battery and improves the use safety of the battery.

Alternatively, as shown in fig. 4, the first sealing edge and the second sealing edge at two sides of the battery body 10 both adopt the battery sealing edge structure 20 shown in fig. 1.

As shown in fig. 5, the first sealing edge and the second sealing edge at two sides of the battery body 10 respectively adopt the battery sealing edge structure 20 shown in fig. 1 and 2.

As shown in fig. 6, the first sealing edge and the second sealing edge at two sides of the battery body 10 respectively adopt the battery sealing edge structure 20 shown in fig. 1 and 3.

As shown in fig. 7, the first sealing edge and the second sealing edge at two sides of the battery body 10 both adopt the battery sealing edge structure 20 shown in fig. 2.

As shown in fig. 8, the first sealing edge and the second sealing edge at two sides of the battery body 10 respectively adopt the battery sealing edge structure 20 shown in fig. 2 and 3.

As shown in fig. 9, the first sealing edge and the second sealing edge at two sides of the battery body 10 both adopt the battery sealing edge structure 20 shown in fig. 3.

The lithium ion battery in this embodiment may have any one of the above structures, and this embodiment is not particularly limited.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A battery edge sealing structure, comprising:

the inner folding edge structure is connected with the outer folding edge structure;

the outer folding edge structure comprises a first outer folding edge (1) and a second outer folding edge (2), the inner folding edge structure comprises a first inner folding edge (3), and the first outer folding edge (1), the second outer folding edge (2) and the first inner folding edge (3) are sequentially connected in a bending manner;

the width of the first outer folding edge (1), the width of the second outer folding edge (2) and the width of the first inner folding edge (3) are equal.

2. The battery edge sealing structure of claim 1,

the outer folding edge structure comprises a third outer folding edge (4) and a fourth outer folding edge (6), the inner folding edge structure comprises a second inner folding edge (5), and the third outer folding edge (4), the second inner folding edge (5) and the fourth outer folding edge (6) are sequentially connected in a bending mode.

3. The battery edge sealing structure of claim 2,

the width of the second inner folding edge (5) is 45% -55% of that of the third outer folding edge (4), and the width of the fourth outer folding edge (6) is 45% -55% of that of the second inner folding edge (5).

4. The battery edge sealing structure of claim 1,

the outer folding edge structure comprises a fifth outer folding edge (7), the inner folding edge structure comprises a third inner folding edge (8), and the fifth outer folding edge (7) and the third inner folding edge (8) are sequentially connected in a bending mode.

5. The battery edge sealing structure of claim 4,

the width of the third inner folding edge (8) is 45% -55% of the width of the fifth outer folding edge (7).

6. The battery edge sealing structure according to any one of claims 1 to 5,

the width of the battery edge sealing structure is 6mm-12 mm.

7. A lithium ion battery comprising a battery body (10), a first edge seal at one side of the battery body (10) and a second edge seal at the other side of the battery body (10), wherein at least one of the first edge seal and the second edge seal is the battery edge seal structure according to any one of claims 1 to 6.