Arc-shaped battery gradual change type forming mechanism and forming equipment

Abstract

The invention belongs to the technical field of lithium ion batteries, and particularly relates to an arc-shaped battery gradually-changing type forming mechanism and forming device.The arc-shaped battery gradually-changing type forming mechanism comprises linear bearings, guide shafts, an upper forming die, a top plate, guide columns, a gradually-changing type lower forming die, a compression spring, a base, a bottom plate and a shaping supporting plate; each linear bearing is connected with a guide shaft in a sliding mode, the bottoms of the guide shafts are fixed to the bottom plate, the upper forming die is fixed to the bottom of the top plate, the guide columns are sequentially fixed to the two sides of the bottom plate in a pairwise corresponding mode, the guide columns are sleeved with the compression springs, and the gradually-changing type lower forming die is sequentially installed on the two corresponding guide columns. The shaping supporting plate is fixed to the base and located below the gradually-changing type forming lower die, and the base is fixed to the bottom plate. The forming equipment is simple in structure and easy to manufacture and maintain, the production cost of the battery can be effectively reduced, and large-scale application of the lithium ion battery can be promoted.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a curved battery gradual-change forming mechanism and forming equipment. Background Art

[0002] Lithium-ion batteries are a new type of green energy. They are widely used in various portable electronic devices, electric vehicles, etc. due to their advantages such as high energy density, long cycle life, and low self-discharge rate. The shape and structure of the battery have an important influence on the performance of the battery, among which the battery molding technology is a key link in the battery manufacturing process.

[0003] In order to be closer to the human body structure, many electronic product studies have made the product appearance into an arc shape, and then required the power supply battery to be made into an arc shape. There are two schemes for the existing arc battery forming technology: one is the pre-arc shape, and the other is the post-arc shape. The pre-arc shape is an arc shape from the pole group. In this scheme, the pole group, shell punching, packaging, formation, and Degas all need to be arc-shaped processes. The production line cost investment is high and the operation process is complicated, so the post-arc shape is optimized. However, there are the following main problems with post-arc forming: first, the multiple molding process is complicated to operate and inefficient, which is not conducive to large-scale production; second, in the multiple molding process, the problems such as the wrinkles of the battery pole piece and the dead folds of the battery concave surface cannot be effectively solved, which will not only affect the performance and service life of the battery, but may also cause safety problems during the use of the battery. Summary of the invention

[0004] The purpose of the present invention is to provide a curved battery gradual forming mechanism and forming equipment to solve the technical problems existing in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a curved battery gradual forming mechanism, comprising a linear bearing, a guide shaft, a forming upper die, a top plate, a guide column, a gradual forming lower die, a compression spring, a base, a bottom plate and a shaping support plate, wherein the four angles of the top plate are respectively installed with the linear bearings, each linear bearing is respectively slidably connected with the guide shaft, the bottom of the guide shaft is fixed to the bottom of the top plate, the forming upper die is fixed to the bottom of the top plate, the guide columns are multiple, divided into two rows, and fixed in pairs on both sides of the bottom plate in sequence, the compression spring is sleeved on the guide columns, the gradual forming lower die is multiple, and is sequentially installed on the corresponding two guide columns, the shaping support plate is fixed on the base and is located below the gradual forming lower die, and the base is fixed to the bottom plate.

[0006] Preferably, the shape of the shaping support plate matches the shape of the forming upper die.

[0007] Preferably, the molding upper die is an arc-shaped convex structure.

[0008] Preferably, the shaping support plate is in the shape of an arc-shaped concave structure.

[0009] The present invention also discloses a curved battery gradual forming device, comprising the forming mechanism, a workbench, a loading mechanism, a transfer mechanism, a pressure mechanism and a unloading mechanism, wherein the forming mechanism is installed in the middle of the workbench, the loading mechanism and the unloading mechanism are respectively located on both sides of the forming mechanism, and the transfer mechanism is installed on the workbench, and is used to place the battery to be formed into the forming mechanism and place the formed battery into the unloading mechanism.

[0010] The beneficial effects of the present invention are as follows: 1. The method of gradual arc-shaped battery forming is adopted. First, the middle position of the battery is clamped, and then gradually deformed to the two sides into an arc. This method can effectively avoid the problem of the traditional arc-shaped battery forming technology that the battery shape is changed by pressing the battery with the upper and lower imitation molds, resulting in wrinkles on the battery poles and dead folds on the concave surface of the battery. 2. The one-time forming method is adopted instead of multiple forming methods, which can simplify the operation, improve efficiency, and facilitate large-scale production. This method can not only save a lot of time and manpower, but also improve the quality and output of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A perspective view of the present invention;

[0012] Figure 2 This is an initial state diagram of the gradual hot pressing forming mechanism of the present invention;

[0013] Figure 3 It is a terminal state diagram of the gradual hot pressing forming mechanism in the present invention;

[0014] Figure 4 It is a pressure holding state diagram of the gradual hot pressing forming mechanism in the present invention;

[0015] Figure 5 A three-dimensional diagram of the plate invention being applied to a molding device. DETAILED DESCRIPTION

[0016] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0018] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fixed connection" and "fixed connection" 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected 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 invention can be understood according to specific circumstances.

[0019] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings and preferred embodiments.

[0020] like Figure 1 As shown, a curved battery gradual forming mechanism includes a linear bearing 2-1, a forming upper die 2-2, a guide column 2-3, a gradual forming lower die 2-4, a compression spring 2-5, a base 2-6, a shaping support plate 2-7, a guide shaft 2-8, a top plate 2-9 and a bottom plate 2-10, wherein the four angles of the top plate are respectively installed with the linear bearings, each linear bearing is respectively slidably connected with the guide shaft, the bottom of the guide shaft is fixed to the bottom of the bottom plate, and the forming upper die is fixed to the bottom of the top plate, and has a heating function. The guide columns are multiple, divided into two rows, and fixed to the two sides of the bottom plate in pairs, the compression spring is sleeved on the guide columns, the gradual forming lower die is multiple, and is installed on the corresponding two guide columns in sequence, the shaping support plate is fixed on the base and is located below the gradual forming lower die, and the base is fixed on the bottom plate.

[0021] Furthermore, the shape of the shaping support plate matches the shape of the upper molding die. That is, when the upper molding die presses the battery downward, the shaping support plate at the bottom should make the shape of the gradual molding lower die gradually match the shape of the upper molding die. Specifically, the upper molding die is an arc-shaped convex structure. The shape of the shaping support plate is an arc-shaped concave structure.

[0022] The initial positions of each module in the initial state are as follows: Figure 2 As shown, the upper surface is on the same horizontal line, serving as a plane support for the silicone sheet 3-1. Since the battery 3-2 is initially flat, the flat battery is placed on a flat support surface, and the positioning is more accurate. The length of each compression spring in the initial state is different. When the equipment is running, the upper forming mold is driven by the downward pressure of the servo motor lead screw and first contacts the initial state battery. The upper forming mold is an arc-shaped convex shape, and the middle position is the lowest. Using this feature, the middle position of the upper forming mold first contacts the gradual forming lower mold located in the middle, and the middle of the battery is clamped first. As the servo motor continues to press down, the gradual forming lower molds on both sides gradually apply pressure to the battery, and finally achieve the purpose of gradual hot pressing of the battery.

[0023] This gradual hot pressing design has the following advantages over conventional molding methods:

[0024] 1) Clamp the battery in the middle first, so that the battery will not be misplaced during the molding process, and the mold will not rub the aluminum plastic shell, causing wrinkles

[0025] 2) Divide the lower mold into 8 parts (only this embodiment is shown)

[0026] Figure 3 It is the terminal state of gradual hot pressing forming. In the terminal state, the upper surface of each module forms a complete arc surface, which is limited and supported by the forming support plate.

[0027] Figure 4 It is a gradual hot pressing molding holding state, and the molding upper mold 2-2, the gradual molding lower mold 2-4 and the shaping support plate 2-7 interact with each other to make the battery into the final arc shape, and the final shape is formed after holding the pressure for a certain period of time.

[0028] like Figure 5As shown, the present invention also discloses a curved battery gradual forming device, including the forming mechanism 1-4, workbench 1-0, feeding mechanism 1-1, transfer mechanism 1-2, pressure mechanism 1-3 and unloading mechanism 1-5, the forming mechanism is installed in the middle of the workbench, the feeding mechanism and unloading mechanism are respectively located on both sides of the forming mechanism, the feeding sample to be confirmed structure is a plane structure, the unloading transfer structure is an arc structure, and an angle suction cup is installed; the transfer mechanism is installed on the workbench, and is used to put the battery to be formed into the forming mechanism and put the formed battery into the unloading mechanism. After unloading, secondary hot pressing and cold pressing processes can be added, and the function is simple, so it is not repeated here.

[0029] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A curved battery gradual forming mechanism, characterized in that: It includes a linear bearing, a guide shaft, a molding upper die, a top plate, a guide column, a gradual molding lower die, a compression spring, a base, a bottom plate and a shaping support plate. The four angles of the top plate are respectively installed with the linear bearings, each linear bearing is slidably connected with the guide shaft, the bottom of the guide shaft is fixed to the bottom of the top plate, the molding upper die is fixed to the bottom of the top plate, the guide columns are multiple and divided into two rows, and two of them are fixed on both sides of the bottom plate in sequence, the compression spring is sleeved on the guide columns, the gradual molding lower die is multiple and is installed on the corresponding two guide columns in sequence, the shaping support plate is fixed on the base and is located below the gradual molding lower die, and the base is fixed to the bottom plate.

2. The arc-shaped battery gradual forming mechanism according to claim 1, characterized in that: The shape of the shaping support plate matches the shape of the forming upper die.

3. The arc-shaped battery gradual forming mechanism according to claim 2, characterized in that: The forming upper die is an arc-shaped convex structure.

4. The arc-shaped battery gradual forming mechanism according to claim 2, characterized in that: The shape of the shaping support plate is an arc-shaped concave structure.

5. A curved battery gradual forming device, characterized in that: It comprises the forming mechanism, workbench, loading mechanism, transfer mechanism, pressure mechanism and unloading mechanism as described in any one of claims 1 to 4, wherein the forming mechanism is installed in the middle of the workbench, the loading mechanism and unloading mechanism are respectively located on both sides of the forming mechanism, and the transfer mechanism is installed on the workbench, and is used to place the batteries to be formed into the forming mechanism and place the formed batteries into the unloading mechanism.

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