Hollow bayonet for vacuum heat sealing

Abstract

The utility model relates to a processing appliance for manufacturing a lithium ion battery, in particular to a hollow bayonet for vacuum heat sealing. The utility model provides the hollow bayonet for vacuum heat sealing, which has an improved structure. The device comprises a bayonet holder, a hollow bayonet, a vacuum tube, a sealing structure and the like, one side of the bayonet holder is connected and communicated with the hollow bayonet, the other side of the bayonet holder is connected and communicated with the vacuum tube, and the sealing structure matched with the inner wall of the bayonet holder is arranged on the inner side of a sealing cover. By means of the hollow bayonet with the interior being of a hollow structure design and the combined structure of the bayonet frame and the vacuum pipe, redundant electrolyte in the air bag of the lithium ion battery can be rapidly extracted out while the air bag of the lithium ion battery is punctured, and therefore the problem that the electrolyte overflows to cause the pollution risk can be effectively solved; the sealing structure is favorable for enhancing the sealing performance of assembly of the bayonet holder and the sealing cover; and through the protective net ring, the purpose of filtering chippings generated by puncturing an air bag on the battery is achieved.

Description

Technical Field

[0001] The utility model relates to a processing tool for producing lithium ion batteries, in particular to a hollow bayonet used for vacuum heat sealing. Background Art

[0002] In the manufacturing process of lithium-ion batteries, vacuum heat sealing is required after liquid injection and formation to extract the gas and excess electrolyte inside the battery, remove the air pockets, and ensure that the sealed edges are intact, so that the inside of the lithium-ion battery maintains a vacuum-sealed negative pressure state.

[0003] Currently, commonly used cutter types mainly include blade knives and round needles. After the pressure plate of the vacuum heat sealer presses the battery, these cutters will pierce the battery's aluminum-plastic film air bag to perform vacuum operation. However, during this process, the electrolyte often flows directly to the surface of the punctured air bag. In a vacuum environment, excess electrolyte may splash onto the surface of the battery body, which can easily cause contamination problems.

[0004] In response to this situation, we have specially proposed a vacuum heat-sealed hollow bayonet with an improved structure, which aims to solve the problem that the existing cutter easily causes electrolyte overflow and pollution when piercing the battery aluminum-plastic film air bag. Utility Model Content

[0005] In order to overcome the disadvantage of the existing cutter structure that the electrolyte is easily overflowed and contaminated during use, the technical problem of the utility model is to provide a hollow bayonet for vacuum heat sealing with an improved structure.

[0006] The technical implementation scheme of the utility model is: a hollow bayonet for vacuum heat sealing, comprising a bayonet stand, a hollow bayonet, a vacuum tube, a sealing cover, a screw, a sealing structure and a protective mesh ring. The interior of the bayonet stand is designed as a hollow structure, one side of the bayonet stand is connected and communicated with the hollow bayonet, and the other side of the bayonet stand is connected and communicated with the vacuum tube. The bayonet stand is threadedly fixed with a sealing cover by the screw, and the inner side of the sealing cover is provided with a sealing structure that fits with the inner wall of the bayonet stand. A protective mesh ring is embedded and clamped in the bayonet stand and at the pipe mouth of the vacuum tube.

[0007] As a further improvement of the above technical solution, the sealing structure includes a convex ring and a sealing ring. The inner side of the sealing cover is provided with a convex ring, the outer side of the convex ring is connected with a sealing ring, and the sealing ring is in contact with the inner wall of the bayonet holder.

[0008] As a further improvement of the above technical solution, the interior of the hollow bayonet is designed as a hollow structure, and the blade end of the hollow bayonet is designed as an inclined boss structure.

[0009] As a further improvement of the above technical solution, a mounting seat is further included. The bayonet holder is provided with a mounting seat on a side close to the vacuum tube, and the mounting seat is provided with an adjustment slot for adjusting the mounting position.

[0010] As a further improvement of the above technical solution, an observation window is also included. A mounting hole is provided on the bayonet holder, and an observation window is embedded in the mounting hole.

[0011] As a further improvement of the above technical solution, the observation window is aligned with the protective net ring.

[0012] The beneficial effects of the utility model are as follows: through the hollow bayonet designed with a hollow internal structure, and the combined structure of the bayonet stand and the vacuum tube, the lithium-ion battery air bag can be punctured and the excess electrolyte therein can be quickly extracted, thereby effectively avoiding the risk of contamination caused by electrolyte overflow; the sealing structure is conducive to enhancing the sealing of the assembly of the bayonet stand and the sealing cover; and the protective mesh ring is conducive to filtering debris generated by puncturing the air bag on the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0014] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model from another perspective.

[0015] Figure 3 It is a cross-sectional view of the present utility model.

[0016] Figure 4 This is a structural separation diagram of the present utility model.

[0017] Figure 5 This is a schematic diagram of the connection structure of the sealing cover, convex ring, screws and sealing ring of the utility model.

[0018] The meaning of the reference numerals in the figure: 1_bayonet holder, 2_hollow bayonet, 3_vacuum tube, 4_sealing cover, 40_convex ring, 5_screw, 6_sealing ring, 7_protective mesh ring, 8_observation window, 9_mounting seat, 10_mounting hole, 11_adjustment slot. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] Embodiment: The utility model provides a hollow bayonet for vacuum heat sealing, such as Figures 1 to 5As shown, it includes a bayonet stand 1, a hollow bayonet 2, a vacuum tube 3, a sealing cover 4, a screw 5, a sealing structure and a protective mesh ring 7. The interior of the bayonet stand 1 is a hollow structure design. One side of the bayonet stand 1 is connected and communicated with the hollow bayonet 2. The interior of the hollow bayonet 2 is a hollow structure design, and the blade end of the hollow bayonet 2 is an inclined boss structure design, which is conducive to puncturing the air bag on the surface of the lithium-ion battery and extracting the excess electrolyte therein, thereby effectively avoiding the situation of electrolyte overflow and pollution; the bayonet stand 1 is also One side is connected and communicated with a vacuum tube 3, the outer end of the vacuum tube 3 is used to connect an external vacuum pump for vacuuming the inside of the bayonet stand 1, a sealing cover 4 is threadedly fixed to the bayonet stand 1 by a screw 5, and a sealing structure is provided on the sealing cover 4. A protective mesh ring 7 is embedded and clamped at the mouth of the vacuum tube 3 in the bayonet stand 1. The protective mesh ring 7 can filter the debris generated when the hollow bayonet 2 pierces the air bag, and the debris and impurities filtered out on the protective mesh ring 7 can be conveniently cleaned by opening the sealing cover 4.

[0021] Further, such as Figures 3 to 5 As shown, the sealing structure includes a convex ring 40 and a sealing ring 6. The convex ring 40 is provided on the inner side of the sealing cover 4, and the sealing ring 6 is connected to the outer side of the convex ring 40. The sealing ring 6 fits the inner wall of the bayonet holder 1, which is beneficial to enhance the sealing performance of the connection between the sealing cover 4 and the bayonet holder 1.

[0022] Further, such as Figures 1 to 4 As shown, a mounting seat 9 is also included. The mounting seat 9 is provided on the side of the bayonet stand 1 close to the vacuum tube 3. An adjustment slot 11 is provided on the mounting seat 9. The adjustment slot 11 is designed as a straight-line structure to facilitate adjustment of the installation position of the bayonet stand 1.

[0023] In addition, if Figure 1 、 Figure 3 and Figure 4 As shown, an observation window 8 is also included. A mounting hole 10 is provided on the bayonet stand 1, and an observation window 8 is embedded in the mounting hole 10 to facilitate viewing the working conditions inside the bayonet stand 1; and the observation window 8 is aligned with the protective net ring 7, which is conducive to convenient viewing of the filtering condition of the protective net ring 7.

[0024] During use, the bayonet stand 1 is fixedly mounted on the equipment for producing and processing lithium-ion batteries through the mounting seat 9, and the vacuum tube 3 is connected to a vacuum pump. When it is necessary to puncture the air bag of the lithium-ion battery and evacuate the air, the vacuum pump is turned on to extract the air inside the bayonet stand 1 through the vacuum tube 3, so that a vacuum state is formed inside the bayonet stand 1 and the hollow bayonet 2, and then the excess electrolyte inside the lithium-ion battery can be extracted through the hollow bayonet 2 under the internal negative pressure state. In this way, the excess electrolyte can be extracted in time while puncturing the lithium-ion battery air bag, thereby effectively avoiding the risk of pollution caused by electrolyte overflow; and the protective mesh ring 7 can filter the debris generated when the air bag on the battery is punctured.

[0025] It should be understood that the embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the contents of the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A hollow bayonet for vacuum heat sealing, characterized by: The invention comprises a bayonet stand (1), a hollow bayonet (2), a vacuum tube (3), a sealing cover (4), a screw (5), a sealing structure and a protective mesh ring (7). The interior of the bayonet stand (1) is designed as a hollow structure. One side of the bayonet stand (1) is connected to and communicated with the hollow bayonet (2). The other side of the bayonet stand (1) is connected to and communicated with the vacuum tube (3). The bayonet stand (1) is threadedly fixed with a sealing cover (4) through the screw (5). The inner side of the sealing cover (4) is provided with a sealing structure that matches the inner wall of the bayonet stand (1). A protective mesh ring (7) is embedded and clamped in the bayonet stand (1) and located at the pipe mouth of the vacuum tube (3).

2. A hollow bayonet for vacuum heat sealing according to claim 1, characterized in that: The sealing structure comprises a convex ring (40) and a sealing ring (6); the convex ring (40) is arranged on the inner side of the sealing cover (4); the sealing ring (6) is connected to the outer side of the convex ring (40); and the sealing ring (6) is in contact with the inner side wall of the bayonet holder (1).

3. A hollow bayonet for vacuum heat sealing according to claim 1, characterized in that: The interior of the hollow bayonet (2) is designed as a hollow structure, and the blade end of the hollow bayonet (2) is designed as an inclined boss structure.

4. A hollow bayonet for vacuum heat sealing according to claim 1, characterized in that: The invention also comprises a mounting seat (9), wherein the mounting seat (9) is provided on the bayonet holder (1) at a side close to the vacuum tube (3), and an adjusting slot (11) for adjusting the mounting position is provided on the mounting seat (9).

5. A hollow bayonet for vacuum heat sealing according to claim 1, characterized in that: It also includes an observation window (8). The bayonet holder (1) is provided with a mounting hole (10), and the observation window (8) is embedded in the mounting hole (10).

6. A hollow bayonet for vacuum heat sealing according to claim 5, characterized in that: The observation window (8) is aligned with the protective mesh ring (7).

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