Vacuum packaging mechanism for soft package battery

Abstract

The utility model discloses a vacuum packaging mechanism for a soft package battery. The vacuum packaging mechanism comprises a heat sealing assembly, a pre-pressing assembly and a smoothing assembly, the heat sealing assembly comprises an upper sealing head and a lower sealing head which are oppositely arranged, the upper sealing head is fixedly connected with the upper heating body, the lower sealing head is fixedly connected with the lower heating body, thermocouples are arranged in the upper sealing head and the lower sealing head, and the thermocouples are arranged close to the working face of the upper sealing head and the working face of the lower sealing head. Heating pipes are arranged on the upper heating body and the lower heating body; the number of the pre-pressing assemblies is two, the two pre-pressing assemblies are symmetrically arranged on the two sides of the heat sealing assembly, each pre-pressing assembly comprises a pre-pressing plate, a connecting plate and a sliding table air cylinder, the connecting plates are fixedly connected with the heat sealing assembly, and the sliding table air cylinders are fixed to the connecting plates. The vacuum packaging mechanism for the soft package battery can ensure that the aluminum plastic film of the battery cell is flat and free of dislocation in a high vacuum state, heat-sealing wrinkles of the aluminum plastic film of the battery cell are eliminated, and the yield is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of soft-pack battery technology, specifically a vacuum packaging mechanism for soft-pack batteries. Background Technology

[0002] Soft-pack lithium batteries are made by injecting electrolyte into an aluminum-plastic film containing the battery cells, and then sealing the aluminum-plastic film under vacuum conditions.

[0003] Currently, the commonly used sealing device is a combination of upper and lower sealing heads and simple blocks. Under high vacuum, the aluminum-plastic film of the battery cell undergoes irregular and irregular deformation, resulting in unevenness on both sides of the sealing aluminum-plastic film. The heat sealing directly causes wrinkles, which leads to the robot arm not being able to hold the battery firmly in the formation process, severe creases on the second sealing edge, and low product yield. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a vacuum packaging mechanism for soft-pack batteries, which ensures that the aluminum-plastic film of the battery cell is flat and without misalignment under high vacuum conditions, eliminates heat sealing wrinkles of the aluminum-plastic film of the battery cell, improves product yield, and can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vacuum packaging mechanism for a soft-pack battery, comprising a heat-sealing assembly, a pre-compression assembly, and a smoothing assembly;

[0006] The heat sealing assembly includes an upper end cap and a lower end cap arranged opposite to each other. The upper end cap is fixedly connected to an upper heating element, and the lower end cap is fixedly connected to a lower heating element. Thermocouples are provided inside both the upper and lower end caps, and the thermocouples are arranged close to the working surfaces of the upper and lower end caps. Heating tubes are provided on both the upper and lower heating elements.

[0007] The number of pre-compression components is two, and the two pre-compression components are symmetrically arranged on both sides of the heat sealing component. Each pre-compression component includes a pre-compression plate, a connecting plate, and a slide cylinder. The connecting plate is fixedly connected to the heat sealing component, and the slide cylinder is fixed on the connecting plate. The telescopic end of the slide cylinder is connected to the pre-compression plate, and the pre-compression working surface of the pre-compression plate is located below the heat sealing component.

[0008] The smoothing component includes a thin-walled cylinder, a connecting body, a push plate, and a top plate. The connecting body is fixed to the lower end of the pre-compression component, and the thin-walled cylinder is fixed to the lower end of the connecting body. The telescopic end of the thin-walled cylinder is connected to the push plate, and the push plate is connected to the top plate. A notch is provided in the middle of the pre-compression plate, and the top plate is located in the notch.

[0009] As a preferred embodiment of this utility model, an upper heat insulation body is provided on the outer side of the upper heating body, and a lower heat insulation body is provided on the outer side of the lower heating body. The connecting plate is connected to the upper heat insulation body and the lower heat insulation body respectively.

[0010] As a preferred embodiment of this utility model, both the upper and lower heat insulation bodies are made of synthetic stone.

[0011] As a preferred embodiment of this utility model, the pre-pressing plate is provided with fixed seats symmetrically on both sides, the fixed seats are fixedly connected to the upper heat insulation body and the lower heat insulation body respectively, the fixed seats are equipped with linear bearings, the linear bearings are provided with optical axes, and the optical axes are fixedly connected to the pre-pressing plate.

[0012] As a preferred embodiment of this utility model, a guide rod is fixed to one side of the top plate, the push plate is sleeved on the guide rod, and a spring is sleeved on the outer side of the guide rod, with the spring located between the push plate and the top plate.

[0013] As a preferred embodiment of this utility model, a suction cup is provided on the other side of the top plate, and the suction cup is directly facing the aluminum-plastic film of the battery cell.

[0014] As a preferred embodiment of this utility model, the thermocouple is selected as a Pt100 adhesive resistance thermometer.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the vacuum packaging mechanism of this soft-pack battery is reasonably designed and ingeniously conceived. By smoothing the component, the aluminum-plastic film of the battery cell is pulled apart by a certain distance, ensuring that the aluminum-plastic film of the battery cell is in a consistent state under high vacuum. By setting a pre-pressure component, the pre-pressure plate pushes the aluminum-plastic film to the packaging position, ensuring that the aluminum-plastic film of the battery cell is packaged without misalignment, which greatly improves the product quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a structural diagram of the encapsulated component;

[0018] Figure 3 This is a schematic diagram of the pre-compression component.

[0019] Figure 4 A schematic diagram of the structure of the smoothing component.

[0020] In the diagram: 1 heat sealing assembly, 11 upper end cap, 12 lower end cap, 13 upper heating element, 14 lower heating element, 15 thermocouple, 16 upper insulation element, 17 lower insulation element, 18 heating tube, 2 pre-compression assembly, 21 linear bearing, 22 optical axis, 23 fixed seat, 24 pre-compression plate, 25 slide cylinder, 26 connecting plate, 3 smoothing assembly, 31 thin-walled cylinder, 32 connecting body, 33 push plate, 34 top plate, 35 guide rod, 36 suction cup. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments (for ease of description and understanding, hereinafter referred to as...). Figure 1 (The above is described above). Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Please see Figure 1-4 This utility model provides a technical solution: a vacuum packaging mechanism for a soft-pack battery, comprising a heat-sealing component 1, a pre-compression component 2, and a smoothing component 3;

[0023] The heat-sealing assembly 1 includes an upper end cap 11 and a lower end cap 12 arranged opposite to each other. The upper end cap 11 is fixedly connected to the upper heating element 13, and the lower end cap 12 is fixedly connected to the lower heating element 14. Thermocouples 15 are provided inside both the upper end cap 11 and the lower end cap 12, and heating tubes 18 are provided on both the upper heating element 13 and the lower heating element 14. In order to ensure the accuracy of temperature detection, the thermocouples 15 are located about 10mm away from the working surfaces of the upper end cap 11 and the lower end cap 12, and the installation positions of the thermocouples 15 are staggered to reduce the impact on the upper end cap 11 and the lower end cap 12.

[0024] There are two pre-pressing components 2, which are symmetrically arranged on both sides of the heat-sealing component 1. Each pre-pressing component 2 includes a pre-pressing plate 24, a connecting plate 26, and a sliding cylinder 25. The connecting plate 26 is fixedly connected to the heat-sealing component 1, and the sliding cylinder 25 is fixed on the connecting plate 26. The telescopic end of the sliding cylinder 25 is connected to the pre-pressing plate 24. The pre-pressing working surface of the pre-pressing plate 24 is located below the heat-sealing component 1. The vertical distance between the pre-pressing plate 24 and the end cap is 3-5mm. The sliding cylinder 25 pushes the pre-pressing plate 24 to move it, moving the aluminum-plastic film of the battery cell to the pre-pressing position to ensure that the aluminum-plastic film of the battery cell is sealed without misalignment.

[0025] The smoothing component 3 includes a thin-walled cylinder 31, a connecting body 32, a push plate 33, and a top plate 34. The connecting body 32 is fixed to the lower end of the pre-compression component 2, and the thin-walled cylinder 31 is fixed to the lower end of the connecting body 32. The telescopic end of the thin-walled cylinder 31 is connected to the push plate 33, and the push plate 33 is connected to the top plate 34. A notch is provided in the middle of the pre-compression plate 24, and the top plate 34 is located in the notch. A suction cup 36 is provided on the other side of the top plate 34. The suction cup 36 is facing the aluminum-plastic film of the battery cell. The aluminum-plastic film of the battery cell is pulled apart by the suction cup 36 on the top plate 34 to be shaped. The number of suction cups 36 can be adjusted according to the size of the battery to ensure that the aluminum-plastic film of the battery cell is in a consistent state under high vacuum.

[0026] Furthermore, in order to ensure that the upper heating element 13 and the lower heating element 14 only transfer heat to the upper end cap 11 and the lower end cap 12, an upper heat insulation body 16 is provided on the outside of the upper heating element 13, and a lower heat insulation body 17 is provided on the outside of the lower heating element 14. The connecting plate 26 is connected to the upper heat insulation body 16 and the lower heat insulation body 17 respectively. The upper heat insulation body 16 and the lower heat insulation body 17 are both made of synthetic stone to avoid damage to the slide cylinder 25.

[0027] Furthermore, in order to prevent the pre-pressure plate 24 from tilting during movement, fixed seats 23 are symmetrically arranged on both sides of the pre-pressure plate 24. The fixed seats 23 are fixedly connected to the upper heat insulation body 16 and the lower heat insulation body 17 respectively. A linear bearing 21 is installed on the fixed seat 23. An optical axis 22 is arranged inside the linear bearing 21. The optical axis 22 is fixedly connected to the pre-pressure plate 24.

[0028] Furthermore, to ensure the stability of the smoothing component 3, a guide rod 35 is fixed on one side of the top plate 34, and a push plate 33 is sleeved on the guide rod 35. A spring is sleeved on the outer side of the guide rod 35. The spring is located between the push plate 33 and the top plate 34. There are four springs, with a compression of 20mm, a spring diameter of 1mm, an outer diameter of 10mm, and a pitch of 5mm. After the springs are installed, the flatness of the aluminum-plastic film of the battery cell can be adjusted.

[0029] To facilitate the installation and removal of thermocouple 15, a Pt100 adhesive-type resistance thermometer is selected for thermocouple 15.

[0030] In use: The battery cell, fixed by the positioning fixture, rotates to the packaging station. The thin-walled cylinder 31 in the smoothing component 3 is activated, causing the push plate 33 to push the spring to compress, which in turn drives the top plate 34 and the suction cup 36 to move. After the aluminum-plastic film of the battery cell is pulled apart by 10mm, the cavity begins to be evacuated to a high vacuum. After reaching the set value of -95KPa, the suction cup 36 releases the vacuum, and the pre-pressure component 2 begins to move. The slide cylinder 25 controls the movement of the pre-pressure plate 24 to apply a certain external force to the aluminum-plastic film of the battery cell. When the gap between the aluminum-plastic film of the battery cell is 2-3mm, the upper sealing head 11 and the lower sealing head 12 in the heat sealing component 1 interact to complete the aluminum-plastic film packaging of the battery cell.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vacuum packaging mechanism for a soft-pack battery, characterized in that: It includes a heat-sealing assembly (1), a pre-compression assembly (2), and a smoothing assembly (3); The heat sealing assembly (1) includes an upper end cap (11) and a lower end cap (12) arranged opposite to each other. The upper end cap (11) is fixedly connected to an upper heating element (13), and the lower end cap (12) is fixedly connected to a lower heating element (14). Thermocouples (15) are provided in both the upper end cap (11) and the lower end cap (12), and the thermocouples (15) are arranged close to the working surfaces of the upper end cap (11) and the lower end cap (12). Heating tubes (18) are provided on both the upper heating element (13) and the lower heating element (14). The number of pre-compression components (2) is two, and the two pre-compression components (2) are symmetrically arranged on both sides of the heat sealing component (1). The pre-compression component (2) includes a pre-compression plate (24), a connecting plate (26) and a slide cylinder (25). The connecting plate (26) is fixedly connected to the heat sealing component (1). The slide cylinder (25) is fixed on the connecting plate (26). The telescopic end of the slide cylinder (25) is connected to the pre-compression plate (24). The pre-compression working surface of the pre-compression plate (24) is located below the heat sealing component (1). The smoothing component (3) includes a thin-walled cylinder (31), a connecting body (32), a push plate (33), and a top plate (34). The connecting body (32) is fixed to the lower end of the pre-compression component (2). The thin-walled cylinder (31) is fixed to the lower end of the connecting body (32). The telescopic end of the thin-walled cylinder (31) is connected to the push plate (33). The push plate (33) is connected to the top plate (34). A notch is provided in the middle of the pre-compression plate (24), and the top plate (34) is located in the notch.

2. The vacuum packaging mechanism for a soft-pack battery according to claim 1, characterized in that: An upper heat insulation body (16) is provided on the outside of the upper heating body (13), and a lower heat insulation body (17) is provided on the outside of the lower heating body (14). The connecting plate (26) is connected to the upper heat insulation body (16) and the lower heat insulation body (17) respectively.

3. The vacuum packaging mechanism for a soft-pack battery according to claim 2, characterized in that: Both the upper insulation body (16) and the lower insulation body (17) are made of synthetic stone.

4. The vacuum packaging mechanism for a soft-pack battery according to claim 2, characterized in that: The pre-pressing plate (24) is symmetrically provided with fixing seats (23) on both sides. The fixing seats (23) are fixedly connected to the upper heat insulation body (16) and the lower heat insulation body (17) respectively. A linear bearing (21) is installed on the fixing seat (23). An optical axis (22) is provided inside the linear bearing (21). The optical axis (22) is fixedly connected to the pre-pressing plate (24).

5. The vacuum packaging mechanism for a soft-pack battery according to claim 1, characterized in that: A guide rod (35) is fixed on one side of the top plate (34), and a push plate (33) is sleeved on the guide rod (35). A spring is sleeved on the outer side of the guide rod (35), and the spring is located between the push plate (33) and the top plate (34).

6. The vacuum packaging mechanism for a soft-pack battery according to claim 5, characterized in that: A suction cup (36) is provided on the other side of the top plate (34), and the suction cup (36) is facing the aluminum-plastic film of the battery cell.

7. The vacuum packaging mechanism for a soft-pack battery according to claim 1, characterized in that: The thermocouple (15) is a Pt100 adhesive resistance thermometer.

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