End socket for packaging cylindrical battery cell

Abstract

The utility model discloses an end socket for packaging a cylindrical battery cell. The end socket comprises an end socket main body, a press-fitting side edge is arranged on one side of the seal head main body; the press-fitting side edge comprises a first sealing part corresponding to a battery cell tab and a second sealing part corresponding to an air bag; and the width of the second sealing part is smaller than that of the first sealing part. According to the utility model, the seal width of the air bag section is reduced, so that the size of the air bag opening is increased to a certain extent, and the heat radiation influence of the seal head on the aluminum plastic film is reduced, thereby obviously improving the liquid injection efficiency and the product yield, and reducing the labor cost and the material cost of liquid injection.

Description

TECHNICAL FIELD

[0001] The utility model relates to the battery production technical field more specifically relates to a kind of for the head of cylinder electric core packaging. BACKGROUND

[0002] With the continuous improvement of people's living standards and the rapid development of intelligent technology, more and more intelligent electronic products enter our life, such as mobile phones, computers, electronic cigarettes, smart watches and other products, which bring great convenience to our life, and also provide a broad development space for lithium-ion batteries. At present, as the main energy provider of intelligent electronic products, lithium-ion batteries usually exist in the form of soft package, aluminum shell and steel shell, especially soft package lithium-ion batteries, which are the main form of consumer lithium-ion batteries. Soft package lithium-ion batteries are usually packaged and shaped using aluminum plastic film. During the packaging of the aluminum plastic film, a certain amount of heat radiation is generated, especially at the position of the top sealing air bag. Severe heat radiation can easily cause the liquid injection port of the air bag to be too small, resulting in appearance contamination defects.

[0003] The aluminum plastic film is mainly composed of nylon, aluminum layer and PP layer. The aluminum plastic film packaging is mainly completed by the melting glue of the innermost PP layer under high temperature. Generally, the wider the head, the more heat the aluminum plastic film receives under the same packaging conditions, and the more serious the heat radiation generated. For soft package cylindrical batteries with two polar tabs, in order to ensure good packaging effect and reduce the risk of liquid leakage caused by poor packaging, different widths of top sealing heads are usually used for packaging according to the different sizes of the electric core during the winding core packaging. Although the wider the top sealing head, the better the packaging effect, but the heat radiation caused by the top sealing head to the air bag part is more serious. Especially for cylindrical cores with two polar tabs and short shape, due to the small space reserved for the liquid injection port of the air bag, combined with the heat radiation problem caused by the wide top sealing stamp, the actual liquid injection port is too small, which increases the electrolyte contamination rate in actual production. Even if artificial expansion is used, the actual liquid injection efficiency and yield are also significantly reduced. SUMMARY

[0004] Therefore, the utility model provides a kind of head for cylinder electric core packaging, and the purpose is to solve the problems in the prior art.

[0005] To solve the above technical problems, the utility model takes the following technical solutions:

[0006] A kind of head for cylinder electric core packaging, comprising: head main body;The side of the head main body is equipped with press side;The press side includes the first seal part corresponding to the polar tab of electric core and the second seal part corresponding to the air bag;The width of the second seal part is less than the width of the first seal part.

[0007] Preferably, the second sealing part is flush with the first sealing part near the center of the head body.

[0008] Preferably, the width of the first sealing part is 1.8mm; and the width of the second sealing part is 1.2mm.

[0009] The utility model discloses relative to prior art has obtained following technical effect: the utility model discloses through reducing the sealing width of air bag section, not only increases air bag mouth size to a certain extent, and reduces the influence of the head to the heat radiation of aluminium plastic film, can obviously improve the liquid injection efficiency and product optimization rate, reduces the artificial cost and material cost of liquid injection. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a perspective view of the head for cylindrical battery cell packaging in one viewing angle of the utility model;

[0011] Figure 2 It is a perspective view of the head for cylindrical battery cell packaging in another viewing angle of the utility model;

[0012] Figure 3 It is a top view of the head for cylindrical battery cell packaging of the utility model;

[0013] Figure 4 It is an application schematic view of the head for cylindrical battery cell packaging of the utility model;

[0014] Figure 5 It is a battery cell sealing schematic view;

[0015] In the drawing: 1, head body; 2, press side; 21, first sealing part; 22, second sealing part; 3, tab; 4, two sealing edge reservation area. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.

[0017] EMBODIMENT

[0018] REFERENCE Figures 1-5The utility model discloses a kind of end head for cylindrical electric core packaging, comprising: end head main body 1;End head main body 1 side is equipped with press-fit side edge 2;Press-fit side edge 2 includes the first seal part 21 corresponding with electric core tab and the second seal part 22 corresponding with gas bag;The width of second seal part 22 is less than the width of first seal part 21.

[0019] The above technical solution divides the press-fit side edge into the first seal part and the second seal part, sets the width of the second seal part to be less than the width of the first seal part, so as to reduce the seal width of the gas bag section, thereby not only increasing the gas bag opening size to a certain extent, but also reducing the influence of the end head on the aluminum plastic film heat radiation, while the electric core top sealing position seal width remains unchanged, and the seal width at the gas bag position is reduced from the second seal reserved position, so that the top sealing and the second sealing packaging glue effect are not affected.

[0020] In the embodiment, the second seal part 22 is flush with the first seal part 21 near the center of the end head main body 1.

[0021] In the embodiment, the width of the first seal part 21 is 1.8 mm; the width of the second seal part 22 is 1.2 mm.

[0022] In the embodiment, the length direction of the first seal part 21 ends at the top sealing edge to the second sealing edge reserved area.

[0023] In the embodiment, the length direction of the second seal part 22 starts from the second sealing edge reserved area to the gas bag tail end.

[0024] In the embodiment, the electric core top sealing position seal width remains unchanged, and the seal width at the gas bag position is reduced from the second sealing reserved position, so that the top sealing and the second sealing packaging glue effect are not affected.

[0025] In the embodiment, the first seal part 21 and the second seal part 22 are an integral structure.

[0026] The above is only a preferred embodiment of the utility model, and does not limit the technical scope of the utility model, so any slight modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model still belongs to the scope of the technical solution of the utility model.

Claims

1. A cap for packaging cylindrical battery cells, characterized in that, include: The head body (1) has a press-fit side (2) on one side; the press-fit side (2) includes a first sealing part (21) corresponding to the battery cell tab and a second sealing part (22) corresponding to the air bag; the width of the second sealing part (22) is smaller than the width of the first sealing part (21).

2. The end cap for cylindrical battery cell packaging according to claim 1, characterized in that, The second sealing part (22) is flush with the side of the first sealing part (21) near the center of the head body (1).

3. The end cap for cylindrical battery cell packaging according to claim 1, characterized in that, The width of the first sealing part (21) is 1.8 mm; the width of the second sealing part (22) is 1.2 mm.

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