Diaphragm positioning and cutting mechanism of battery cell winding equipment

Abstract

The diaphragm positioning and cutting mechanism of the battery cell winding equipment comprises a mounting substrate; the sliding mounting plate can be horizontally and movably arranged on the mounting base plate; the diaphragm upper positioning part, the diaphragm lower positioning part and the diaphragm cutter are arranged on the sliding mounting plate, the diaphragm upper positioning part is located above the diaphragm cutter, the diaphragm lower positioning part is located below the diaphragm cutter, and the diaphragm cutter can move horizontally under the control of a driving unit; and the positioning driving assembly is used for driving the sliding mounting plate to move. According to the diaphragm positioning and cutting mechanism, the diaphragm upper positioning part, the diaphragm lower positioning part and the diaphragm cutter are integrated together, the diaphragm upper positioning part and the diaphragm lower positioning part which are located on the upper side and the lower side of the diaphragm cutter can position the diaphragm at the same time when winding needle stations are switched, and the situation that the diaphragm above a winding needle is positioned after a pole piece is conveyed is not needed; the waiting time is reduced, and the equipment efficiency is improved by shortening the auxiliary time.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery automated production equipment, and in particular relates to a diaphragm positioning and cutting mechanism in a battery core winding device. Background Art

[0002] A wound battery cell is a product made by winding the positive and negative electrode sheets and separators through a winding machine. During the winding process, the positive and negative electrode sheets and separators are unwound separately and then gathered onto a winding needle to form the battery cell. The winding cycle of a battery cell mainly consists of winding time and auxiliary time. Winding time is the time it takes the winding needle to wind the electrode sheets and separator into the battery cell, while auxiliary time is the time it takes for non-winding needles to perform winding operations, such as switching winding needle positions, positioning the separator, threading the separator through the separator, clamping the separator, and cutting the separator. Reducing winding time and auxiliary time can improve equipment efficiency.

[0003] Figure 1 It is a schematic diagram of the winding of the battery cell winding equipment, such as Figure 1 As shown, three winding needles 101 are provided at the winding head 100. When the winding head 100 rotates along the station conversion direction indicated by the arrow in the figure, the winding needle 101 can move between the winding station A, the gluing station B and the unloading station C as the winding head 100 rotates. After the winding needle station conversion is completed, it is usually necessary to position the diaphragm 200. The actions to be performed in this process are as follows: the diaphragm positioning roller 102 located below the winding needle moves forward to its position, the film feeding mechanism (not shown) feeds the film, and the pole piece guide roller 103 guides the pole piece 201. At the same time, the diaphragm 200 located above the winding needle can be positioned. After the diaphragms above and below the winding needle are positioned, the winding needle can pass through the diaphragm. Since the diaphragm needs to wait for the pole piece to be fed before completing the upper and lower positioning, the waiting time for subsequent actions is increased, which is not conducive to improving equipment efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a diaphragm positioning and cutting mechanism which can improve the efficiency of battery core winding equipment.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The diaphragm positioning and cutting mechanism of the battery cell winding equipment includes: a mounting base; a sliding mounting plate horizontally movably arranged on the mounting base; an upper diaphragm positioning part, a lower diaphragm positioning part and a diaphragm cutter arranged on the sliding mounting plate, the upper diaphragm positioning part is located above the diaphragm cutter, the lower diaphragm positioning part is located below the diaphragm cutter, and the diaphragm cutter can be horizontally moved under the control of a driving unit; and a positioning drive component that drives the sliding mounting plate to move.

[0007] In some optional embodiments, the positioning portion on the diaphragm is a flat plate.

[0008] In some optional embodiments, the lower positioning portion of the diaphragm is a pressure roller.

[0009] In some optional embodiments, the positioning portion on the diaphragm is arranged above the diaphragm cutter through a connecting plate, and the connecting plate includes a first connecting plate connected to the sliding mounting plate and a second connecting plate connected to the first connecting plate, the first connecting plate is a vertical plate, and the second connecting plate is a horizontal plate.

[0010] Furthermore, it also includes a linear bearing arranged on the second connecting plate, a guide rod passing through the linear bearing, and an upper positioning drive unit for controlling the upper positioning part of the diaphragm to extend forward or retreat horizontally, and the front end of the guide rod is connected to the upper positioning part of the diaphragm.

[0011] Furthermore, the upper positioning drive unit is a cylinder, and the piston rod of the cylinder is connected to the upper positioning portion of the diaphragm.

[0012] It can be seen from the above technical solution that the diaphragm positioning and cutting mechanism of the utility model integrates the upper and lower positioning of the diaphragm and the diaphragm cutter. The upper diaphragm positioning part and the lower diaphragm positioning part located on the upper and lower sides of the diaphragm cutter can position the diaphragm at the same time when the winding needle station is converted. There is no need to wait for the electrode to be fed before positioning the diaphragm above the winding needle, which reduces the waiting time and improves the equipment efficiency by shortening the auxiliary time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 Schematic diagram of the needle winding station conversion for existing winding equipment;

[0015] Figure 2 This is a structural diagram of the diaphragm positioning and cutting mechanism according to an embodiment of the present utility model;

[0016] Figure 3 This is a top view of the diaphragm positioning and cutting mechanism according to an embodiment of the present utility model;

[0017] Figure 4 This is a side view of the diaphragm positioning and cutting mechanism according to an embodiment of the present invention.

[0018] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] The present invention is described in detail below in conjunction with the accompanying drawings. When describing the embodiments of the present invention in detail, for the sake of convenience, the drawings showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. It should be noted that the drawings are simplified and all use non-precise scales, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features; the terms "front", "back", "bottom", "upper", "lower", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0020] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two components; it can mean a wireless connection or a wired connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0021] like Figure 1 、 Figure 2 and Figure 3 As shown, the diaphragm positioning and cutting mechanism of this embodiment includes a mounting base 1, a positioning drive assembly 2, a sliding mounting plate 3, a lower diaphragm positioning portion 4, an upper diaphragm positioning portion 5, a diaphragm cutter 6, a cutter drive unit 7, and a connecting plate 8. The diaphragm positioning and cutting mechanism is used to position and cut the diaphragm after the winding needle completes the station conversion.

[0022] The mounting base 1 is used to fix the diaphragm positioning and cutting mechanism to the frame (not shown) of the winding device. The sliding mounting plate 3 can be horizontally movably arranged on the mounting base 1, and the movement of the sliding mounting plate 3 is controlled by the positioning drive assembly 2. The positioning drive assembly 2 of this embodiment includes a motor and a screw driven by the motor. The nut on the screw is connected to the sliding mounting plate 3. When the motor drives the screw to rotate, it can drive the sliding mounting plate 3 to move horizontally forward or backward. In this embodiment, a horizontal slide rail is set on the mounting base 1. The sliding mounting plate 3 is set on the slide rail through the slide seat 3a and can move horizontally along the slide rail.

[0023] The lower and upper diaphragm positioning members 4 and 5, as well as the diaphragm cutter 6, are all mounted on the sliding mounting plate 3. When the sliding mounting plate 3 moves horizontally, the lower and upper diaphragm positioning members 4, 5, and diaphragm cutter 6 can be moved forward or backward. When moving forward, the lower and upper diaphragm positioning members 4 and 5 can simultaneously position the diaphragm, thereby facilitating the needle-threading operation. The diaphragm cutter 6 is mounted on the sliding mounting plate 3 so as to be horizontally movable under the control of a cutter drive unit 7.

[0024] The upper diaphragm positioning portion 5 and the lower diaphragm positioning portion 4 are located above and below the diaphragm cutter 6, respectively. In this embodiment, the upper diaphragm positioning portion 5 is positioned above the diaphragm cutter 6 via a connecting plate 8, which is fixedly connected to the sliding mounting plate 3. In this embodiment, the lower diaphragm positioning portion 4 is in the form of a roller, while the upper diaphragm positioning portion 5 is plate-shaped. This plate-like structure of the upper diaphragm positioning portion 5 saves space.

[0025] During the winding process, when the diaphragm is positioned, the winding needle will pass through the diaphragm and cut the diaphragm. The utility model provides a diaphragm upper positioning portion 5 above the diaphragm cutter 6. In order to prevent the diaphragm upper positioning portion 5 from interfering with the winding needle when the diaphragm is wound after the diaphragm is cut, preferably, the diaphragm upper positioning portion 5 of this embodiment can be horizontally movably provided on the connecting plate 8. The connecting plate 8 of this embodiment includes a first connecting plate 8-1 connected to the sliding mounting plate 3 and a second connecting plate 8-2 connected to the first connecting plate 8-1. Among them, the first connecting plate 8-1 is a vertical plate, the second connecting plate 8-2 is a horizontal plate, and the first connecting plate 8-1 and the second connecting plate 8-2 are perpendicular to each other. A linear bearing 9 is provided on the second connecting plate 8-2, and a guide rod 10 passes through the linear bearing 9. The front end of the guide rod 10 is connected to the diaphragm upper positioning portion 5, and the guide rod 10 is used to ensure the horizontal movement of the diaphragm upper positioning portion 5. The second connecting plate 8-2 is provided with an upper positioning portion drive unit 11, which is used to control the horizontal forward extension or backward movement of the diaphragm upper positioning portion 5. In this embodiment, the upper positioning portion drive unit 11 is a pneumatic cylinder, the piston rod of which is connected to the diaphragm upper positioning portion 5. When the cylinder is actuated, it can push the diaphragm upper positioning portion 5 forward or retract the diaphragm upper positioning portion 5.

[0026] Once the diaphragm is positioned and the winding needle has passed through and cut the diaphragm, the winding needle will immediately begin winding. At this point, the upper diaphragm positioning portion 5 can be quickly retracted by the upper positioning portion drive unit 11 to prevent interference with the winding needle. The lower diaphragm positioning portion 4, on the other hand, needs to hold down the tail of the diaphragm after cutting and wait for the winding to be completed, and does not need to be quickly retracted.

[0027] The diaphragm positioning and cutting mechanism of the utility model integrates the diaphragm cutter and the upper and lower positioning of the diaphragm. Under the control of the positioning drive component, the upper positioning part and the lower positioning part of the diaphragm can be pushed out synchronously. When the winding needle station is switched, the diaphragms located above and below the winding needle are synchronously positioned. There is no need to wait for the film feeding mechanism to feed the film and then the pole piece guide mechanism to position the diaphragm located above the winding needle, which reduces the waiting time and is conducive to improving equipment efficiency.

[0028] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The diaphragm positioning and cutting mechanism of the battery core winding equipment is characterized by: include: Install the baseboard; a sliding mounting plate horizontally movably disposed on the mounting base plate; An upper diaphragm positioning portion, a lower diaphragm positioning portion, and a diaphragm cutter are provided on the sliding mounting plate, wherein the upper diaphragm positioning portion is located above the diaphragm cutter, the lower diaphragm positioning portion is located below the diaphragm cutter, and the diaphragm cutter can move horizontally under the control of a driving unit; A positioning drive assembly drives the sliding mounting plate to move.

2. The diaphragm positioning and cutting mechanism of the battery core winding device according to claim 1, characterized in that: The positioning portion on the diaphragm is a flat plate.

3. The diaphragm positioning and cutting mechanism of the battery core winding device according to claim 1, characterized in that: The lower positioning portion of the diaphragm is a pressure roller.

4. The diaphragm positioning and cutting mechanism of the battery core winding device according to claim 1, characterized in that: The upper positioning portion of the diaphragm is arranged above the diaphragm cutter through a connecting plate, and the connecting plate includes a first connecting plate connected to the sliding mounting plate and a second connecting plate connected to the first connecting plate. The first connecting plate is a vertical plate and the second connecting plate is a horizontal plate.

5. The diaphragm positioning and cutting mechanism of the battery core winding device according to claim 4, characterized in that: It also includes a linear bearing arranged on the second connecting plate, a guide rod passing through the linear bearing, and an upper positioning drive unit for controlling the upper positioning part of the diaphragm to extend forward or retreat horizontally, and the front end of the guide rod is connected to the upper positioning part of the diaphragm.

6. The diaphragm positioning and cutting mechanism of the battery core winding device according to claim 5, characterized in that: The upper positioning drive unit is a cylinder, and the piston rod of the cylinder is connected to the upper positioning portion of the diaphragm.

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