Lithium battery aluminum plastic film heating device

Abstract

The utility model relates to the technical field of lithium batteries, and discloses a lithium battery aluminum plastic film heating device which comprises a base, an air source, a heating mechanism, a protective cover and a lifting driving mechanism, the inside of the base is hollow, and a plurality of vent holes communicated with the inside of the base are formed in the upper surface of the base; the air source is connected with the base so as to supply air into the base; the heating mechanism is mounted in the base and used for heating gas in the base; the protective cover is arranged above the base; the lifting driving mechanism is installed on the base and connected with the protective cover, and the lifting driving mechanism is used for driving the protective cover to do lifting motion so that the protective cover can cover the base or be away from the base. According to the utility model, the aluminum-plastic film can be uniformly heated, the ductility of each area of the aluminum-plastic film is uniform, and the integral ductility of the aluminum-plastic film is improved, so that the shell punching forming quality of the aluminum-plastic film in the shell punching process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a lithium battery aluminum-plastic film heating device. Background Art

[0002] Lithium batteries usually use a single-piece aluminum-plastic film packaging shell with pits to wrap the battery cell. The aluminum-plastic film packaging shell with pits is usually punched and formed by a shell punching machine. During the stamping process of the aluminum-plastic film by the shell punching machine, the ductility of the aluminum-plastic film is required to be high. If the ductility of the aluminum-plastic film is poor, it will cause the aluminum-plastic film to be prone to wrinkles, deformation and other problems during the shell punching. At present, a heating tube is generally provided on the shell punching machine to assist in heating the aluminum-plastic film, and the ductility of the aluminum-plastic film is improved by increasing the temperature of the aluminum-plastic film. However, the heating tubes are generally distributed and can only heat multiple local areas of the aluminum-plastic film, resulting in uneven heating of the aluminum-plastic film, making the ductility of each area of ​​the aluminum-plastic film uneven, which will affect the quality of the shell punching of the aluminum-plastic film. Utility Model Content

[0003] The utility model aims to provide a lithium battery aluminum-plastic film heating device, so as to make the aluminum-plastic film heated evenly, improve the overall ductility of the aluminum-plastic film, and thus improve the shell forming quality of the aluminum-plastic film in the shell punching process.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The lithium battery aluminum-plastic film heating device of the utility model comprises:

[0006] A base, wherein the interior of the base is hollow, and a plurality of vent holes communicating with the interior of the base are formed on the upper surface of the base;

[0007] an air source connected to the base to supply air to the interior of the base;

[0008] A heating mechanism is installed inside the base, and is used to heat the gas inside the base;

[0009] A protective cover is arranged above the base;

[0010] The lifting drive mechanism is installed on the base and connected to the protective cover. The lifting drive mechanism is used to drive the protective cover to move up and down so that the protective cover is covered on the base or away from the base.

[0011] Preferably, an aluminum-plastic film placement area is provided on the upper surface of the base, and the plurality of vents are evenly distributed in the aluminum-plastic film placement area.

[0012] Preferably, the orthographic projection of the protective cover on the base covers the aluminum-plastic film placement area.

[0013] Preferably, grooves are provided on two opposite sides of a surface of the protective cover facing the base, and the notches of the grooves are arranged toward the base.

[0014] Preferably, the heating mechanism comprises a heating tube, and the heating tube is inserted into the base.

[0015] Preferably, the heating mechanism further comprises a temperature controller, and the temperature controller is electrically connected to the heating tube.

[0016] Preferably, at least two heating tubes are provided, the central axes of the heating tubes are coplanar, and the plane where the central axes of the heating tubes are located is parallel to the upper surface of the base.

[0017] Preferably, the lifting drive mechanism comprises a bracket and a lifting drive member, the bracket is mounted on the base, and the lifting drive member is mounted on the bracket and connected to the protective cover.

[0018] Preferably, a plurality of lifting drive members are provided, and the plurality of lifting drive members are arranged at intervals along the length direction of the bracket.

[0019] Compared with the prior art, the lithium battery aluminum-plastic film heating device of the utility model has the following beneficial effects:

[0020] The lithium battery aluminum-plastic film heating device of the utility model embodiment comprises a base, an air source, a heating mechanism, a protective cover and a lifting drive mechanism, wherein a vent hole is provided on the base, a heating mechanism is arranged in the base, and a protective cover is arranged above the base. The gas introduced into the base is heated by the heating mechanism, and the heated gas is discharged to the base through the vent hole, and the heat is transferred to the aluminum-plastic film on the base, thereby increasing the temperature of the aluminum-plastic film, improving the ductility of the aluminum-plastic film, and facilitating the punching and forming of the aluminum-plastic film. The protective cover is driven downward by the lifting drive mechanism, so that the protective cover is covered on the base, and after the heated gas enters the base through the vent hole, it flows into the protective cover, so that the internal space of the protective cover is kept at a constant temperature as a whole, and the heated gas is dispersed on the surface of the aluminum-plastic film, and the heat is transferred to the aluminum-plastic film, so that the aluminum-plastic film is heated evenly, and the ductility of each area of ​​the aluminum-plastic film is evenly, and the ductility of the aluminum-plastic film as a whole is improved, thereby improving the punching and forming quality of the aluminum-plastic film in the punching process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the lithium battery aluminum-plastic film heating device according to an embodiment of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the base in the embodiment of the utility model;

[0023] Figure 3It is a top view schematic diagram of the base in the embodiment of the utility model;

[0024] Figure 4 It is a front view schematic diagram of the protective cover in the embodiment of the utility model.

[0025] Numbers in the figure:

[0026] 1. Base; 11. Ventilation hole; 2. Heating tube; 3. Protective cover; 31. Groove; 4. Lifting drive mechanism; 41. Bracket; 42. Lifting drive member. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] See also Figure 1-Figure 4As shown, an embodiment of the utility model provides a lithium battery aluminum-plastic film heating device, comprising a base 1, an air source, a heating mechanism, a protective cover 3 and a lifting drive mechanism 4. The interior of the base 1 is hollow, and a plurality of vents 11 communicating with the interior of the base 1 are provided on the upper surface of the base 1; the air source is connected to the base 1 to supply air to the interior of the base 1; the heating mechanism is installed inside the base 1, and the heating mechanism is used to heat the gas inside the base 1; the protective cover 3 is arranged above the base 1; the lifting drive mechanism 4 is installed on the base 1 and connected to the protective cover 3, and the lifting drive mechanism 4 is used to drive the protective cover 3 to move up and down, so that the protective cover 3 is covered on the base 1 or away from the base 1. When the lifting drive mechanism 4 drives the protective cover 3 to descend, the protective cover 3 can be covered on the base 1 to provide a storage space for the gas overflowing through the vent hole 11, so that the inside of the protective cover 3 can maintain a constant temperature, which is convenient for the aluminum-plastic film between the protective cover 3 and the base 1 to be heated; when the lifting drive mechanism 4 drives the protective cover 3 to rise, the protective cover 3 can be moved away from the base 1, and sufficient space can be reserved between the protective cover 3 and the base 1 to facilitate the placement of the aluminum-plastic film on the base 1.

[0031] The gas introduced into the base 1 is heated by the heating mechanism, and the heated gas is discharged to the base 1 through the vent hole 11, and the heat is transferred to the aluminum-plastic film on the base 1, so that the temperature of the aluminum-plastic film is increased, the ductility of the aluminum-plastic film is improved, and the shell forming of the aluminum-plastic film is facilitated. The protective cover 3 is driven downward by the lifting drive mechanism 4, so that the protective cover 3 is covered on the base 1. After the heated gas enters the base 1 through the vent hole 11, it flows into the protective cover 3, so that the internal space of the protective cover 3 is kept at a constant temperature as a whole. The heated gas is dispersed on the surface of the aluminum-plastic film, and the heat is transferred to the aluminum-plastic film, so that the aluminum-plastic film is heated evenly, the ductility of each area of ​​the aluminum-plastic film is uniform, and the overall ductility of the aluminum-plastic film is improved, thereby improving the shell forming quality of the aluminum-plastic film in the shell forming process.

[0032] In some embodiments, the air source is a compressed air source, and compressed air is supplied to the base 1 through the air source. Figure 1-Figure 3 The base 1 is a rectangular box structure. An aluminum-plastic film placement area is provided on the upper surface of the base 1, and the aluminum-plastic film placement area is used to place the aluminum-plastic film to be heated. A plurality of vents 11 are evenly distributed in the aluminum-plastic film placement area, which improves the uniformity of gas dispersion above the base 1 and makes the aluminum-plastic film more evenly heated. The orthographic projection of the protective cover 3 on the base 1 covers the aluminum-plastic film placement area, so that the gas overflowing through the vents 11 can smoothly enter the protective cover 3, reducing the energy waste caused by the gas directly overflowing the outside of the protective cover 3.

[0033] See also Figure 1 and Figure 4In some embodiments, the protective cover 3 is tapered with a small top and a large bottom. The lower side cross-section of the protective cover 3 is larger, which facilitates the gas overflowing from the vent hole 11 to enter the protective cover 3; the upper side cross-section of the protective cover 3 is smaller, which facilitates the accumulation of gas in the protective cover 3. Grooves 31 are provided on the two opposite sides of the protective cover 3 facing the base 1, and the notches of the grooves 31 are arranged toward the base 1. The two grooves 31 on the opposite sides respectively penetrate the side walls of the protective cover 3 to form channels for the aluminum-plastic film to pass through, which facilitates the extraction of the heated aluminum-plastic film and the overflow of the gas from the grooves 31, thereby facilitating the circulation of the gas. The depth of the grooves 31 is preferably greater than the thickness of the aluminum-plastic film. The provision of the grooves 31 can also prevent the protective cover 3 from directly pressing against the aluminum-plastic film to cause pressure loss to the aluminum-plastic film.

[0034] See also Figure 1 In some embodiments, the heating mechanism includes a heating tube 2, which is inserted into the base 1. The heating tube 2 is preferably an electric heating tube 2. There are at least two heating tubes 2, the central axes of each heating tube 2 are coplanar, and the plane where the central axes of each heating tube 2 are located is parallel to the upper surface of the base 1. The diameters of the heating tubes 2 are the same. The distances between the central axes of each heating tube 2 and the upper surface of the base 1 are equal, and the diffusion distances of the gas heated by each heating tube 2 to the vents 11 on the upper surface of the base 1 are basically equal. The heat loss generated during the gas diffusion process is basically the same, so that the temperature of the gas overflowing through the vents 11 is not much different, so that the heat conduction of the heated gas to the aluminum-plastic film is not much different, so that the aluminum-plastic film is heated evenly. Multiple heating tubes 2 are arranged at equal intervals along the length direction or width direction of the base 1. When multiple heating tubes 2 are arranged at equal intervals along the length direction of the base 1, the length direction of the heating tube 2 is parallel to the width direction of the base 1; when multiple heating tubes 2 are arranged at equal intervals along the width direction of the base 1, the length direction of the heating tube 2 is parallel to the length direction of the base 1.

[0035] In some embodiments, the heating mechanism further includes a temperature controller, which is electrically connected to the heating tube 2 , and the heating temperature of the heating tube 2 is conveniently controlled by the temperature controller.

[0036] See also Figure 1 In some embodiments, the lifting drive mechanism 4 includes a bracket 41 and a lifting drive member 42, the bracket 41 is mounted on the base 1, and the lifting drive member 42 is mounted on the bracket 41 and connected to the protective cover 3. The bracket 41 provides a mounting carrier for the lifting drive member 42, and the lifting drive member 42 drives the protective cover 3 to move up and down. The bracket 41 is a door-type frame structure. The lifting drive member 42 is a cylinder. There are multiple lifting drives 42, and the multiple lifting drives 42 are spaced along the length direction of the bracket 41 to provide a balanced lifting force to the protective cover 3 to prevent the protective cover 3 from being deflected during the lifting process. Figure 1 Two lifting drives 42 are shown.

[0037] The working process of the utility model is:

[0038] The aluminum-plastic film is placed on the aluminum-plastic film placement area on the base 1, and the aluminum-plastic film can basically cover the position of the vent hole 11. The heating tube 2 and the gas source are started, and the gas is heated by the heating tube 2 while supplying gas into the base 1; the protective cover 3 is driven down by the lifting drive member 42, so that the protective cover 3 is covered on the base 1.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A lithium battery aluminum-plastic film heating device, characterized in that: include: A base, wherein the interior of the base is hollow, and a plurality of vent holes communicating with the interior of the base are formed on the upper surface of the base; an air source connected to the base to supply air to the interior of the base; A heating mechanism is installed inside the base, and is used to heat the gas inside the base; A protective cover is arranged above the base; The lifting drive mechanism is installed on the base and connected to the protective cover. The lifting drive mechanism is used to drive the protective cover to move up and down so that the protective cover is covered on the base or away from the base.

2. The lithium battery aluminum-plastic film heating device according to claim 1, characterized in that: An aluminum-plastic film placement area is provided on the upper surface of the base, and a plurality of vent holes are evenly distributed in the aluminum-plastic film placement area.

3. The lithium battery aluminum-plastic film heating device according to claim 2, characterized in that: The orthographic projection of the protective cover on the base covers the aluminum-plastic film placement area.

4. The lithium battery aluminum-plastic film heating device according to claim 1, characterized in that: Grooves are provided on two opposite sides of one side of the protective cover facing the base, and the notches of the grooves are arranged toward the base.

5. The lithium battery aluminum-plastic film heating device according to claim 1, characterized in that: The heating mechanism comprises a heating tube, and the heating tube is inserted into the base.

6. The lithium battery aluminum-plastic film heating device according to claim 5, characterized in that: The heating mechanism also includes a temperature controller, and the temperature controller is electrically connected to the heating tube.

7. The lithium battery aluminum-plastic film heating device according to claim 5, characterized in that: At least two heating tubes are provided, the central axes of the heating tubes are coplanar, and the plane where the central axes of the heating tubes are located is parallel to the upper surface of the base.

8. The lithium battery aluminum-plastic film heating device according to claim 1, characterized in that: The lifting drive mechanism comprises a bracket and a lifting drive member, wherein the bracket is mounted on the base, and the lifting drive member is mounted on the bracket and connected to the protective cover.

9. The lithium battery aluminum-plastic film heating device according to claim 8, characterized in that: There are a plurality of lifting driving members, and the plurality of lifting driving members are arranged at intervals along the length direction of the bracket.

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