A lithium-manganese composite machine

Abstract

The present invention relates to a lithium manganese composite machine, which includes a tape unwinding device, a negative electrode feeding device, a positive electrode feeding device, and a separator unwinding and dispensing device; it also includes a first manipulator and a second manipulator; through a specific position structure, the complexity of the equipment is greatly reduced, the volume is reduced, and the difficulty of beat calibration between each module is reduced, achieving the goal of cost reduction and efficiency improvement.

Description

Technical Field

[0001] The present invention relates to an automated production equipment for lithium batteries, in particular to a lithium manganese compound machine. Background Art

[0002] A lithium battery is composed of a positive electrode, a negative electrode, and a separator therebetween, and finally forms a square or cylindrical battery cell finished product by means of folding or winding. For small square soft-pack lithium manganese batteries, the previous process steps were the synchronous unwinding of the positive and negative electrodes and the separator, the welding of the electrode tabs, the fixed-length cutting, the folding, and the edge sealing with adhesive. Due to the process characteristics, the equipment structure is often relatively complex and the overall volume of the machine is large; at the same time, great effort is required to calibrate the rhythm of each step, especially in the front-end unwinding and electrode tab welding stages. Therefore, the overall cost of the equipment is high and the production efficiency is low. Summary of the Invention

[0003] In view of the above situation, it is necessary to provide a lithium manganese compound machine that solves at least one of the above problems.

[0004] A lithium manganese compound machine includes a tape unwinding device, a negative electrode feeding device, a positive electrode feeding device, and a separator unwinding and dispensing device; it also includes a first robot and a second robot;

[0005] The unwinding direction of the tape unwinding device is the length direction of the equipment, and the feeding direction of the negative electrode feeding device is the same as the tape unwinding direction, and the two are arranged in parallel; the end of the tape unwinding device is a carrying platform, and the end of the negative electrode feeding device is a transfer platform; the positions of the carrying platform and the transfer platform are aligned; the first robot shuttles between the carrying platform and the transfer platform, and is used to transfer the negative electrode assembly from the transfer platform to the tape on the carrying platform.

[0006] The unwinding direction of the separator unwinding and dispensing device is the same as the tape unwinding direction, and the separator unwinding and dispensing device is arranged downstream of the tape unwinding device; the feeding direction of the positive electrode feeding device is perpendicular to the unwinding direction of the separator unwinding and dispensing device; the end of the separator unwinding and dispensing device is a second carrying platform, and the end of the positive electrode feeding device is a second transfer platform; the positions of the second carrying platform and the second transfer platform are aligned; the second robot shuttles between the second carrying platform and the second transfer platform, and is used to transfer the positive electrode assembly from the second transfer platform to the separator on the second carrying platform.

[0007] As a further solution of the present invention: it further includes a cutting device, a folding device, a pasting device, and a blanking detection device that are sequentially arranged downstream of the separator unwinding and dispensing device.

[0008] The present invention relates to a lithium-manganese composite machine, which includes a tape unwinding device, a negative electrode feeding device, a positive electrode feeding device, and a separator unwinding and dispensing device; it also includes a first manipulator and a second manipulator; through a specific position structure, the complexity of the equipment is greatly reduced, the volume is reduced, and the difficulty of beat calibration between each module is reduced, achieving the goal of cost reduction and efficiency improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is the overall structure diagram of the present invention;

[0010] Figure 2 is the schematic position diagram of the tape unwinding device and the negative electrode feeding device of the present invention;

[0011] Figure 3 is the schematic position diagram of the separator unwinding and dispensing device and the positive electrode feeding device of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0013] In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more; the terms "center", "longitudinal", "transverse", "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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 of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0014] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "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 directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0015] Such as Figures 1 - 3As shown in the figure, a lithium-manganese composite machine includes a tape unwinding device 100, a negative electrode feeding device 200, a positive electrode feeding device 300, a separator unwinding and dispensing device 400, a cutting device 500, a folding device 600, a tape pasting device 700, and a blanking detection device 800. It is used to stack and compound tape, negative electrode (lithium tape with pole pieces), positive electrode (positive electrode assembly of manganese material with pole pieces), and separator in a certain order, and finally fold and paste them to process into small square soft-pack lithium-manganese batteries. Among them, different from the traditional method, the positive electrode uses an independent feeding method to supply materials to the positive electrode and negative electrode modules, simplifies the unwinding mechanism in the traditional process, solves the high requirements for beat design in traditional equipment, and reduces the design difficulty, calibration difficulty, and production cost of the equipment.

[0016] The tape unwinding device 100 and the negative electrode feeding device 200 are arranged side by side at one end of the equipment, and the tape unwinding direction is the same as the negative electrode feeding direction. Due to this parallel layout, the width space of the equipment can be fully utilized to achieve the effect of reducing the overall length of the equipment. The length of the tape unwinding device 100 is the same as that of the negative electrode feeding device 200. The debugging personnel can visually compare them in the width direction and can achieve beat calibration without comparing through various parameters, which greatly optimizes the debugging efficiency of the beat consistency of the two.

[0017] In this embodiment, the distance between the tape unwinding device 100 and the negative electrode feeding device 200 is fixed. Above the above two, a first manipulator 1 is arranged horizontally. The first manipulator 1 is used to transfer the negative electrode at the negative electrode feeding device 200 to the tape released by the tape unwinding device 100. On the premise that the tape unwinding position is fixed and the distance from the tape to the negative electrode feeding device 200 is fixed, the effect of avoiding position calibration can be directly achieved by fixing the moving stroke of the first manipulator 1. When processing lithium-manganese batteries of different models (different sizes), there is no need to adjust the moving stroke of the first manipulator 1, and the positioning mechanism and equivalent structures are eliminated, simplifying the overall equipment and reducing the production cost.

[0018] Specifically, a loading platform 110 is provided at the end of the tape unwinding device 100, and a material transfer platform 210 is provided at the end of the negative electrode loading device 200; the loading platform 110 and the material transfer platform 210 are opposite in position and fixed in distance in the width direction of the equipment. The track of the first manipulator 1 straddles directly above the loading platform 110 and the material transfer platform 210 in the form of a gantry, so that the first manipulator 1 can move back and forth at a fixed distance, and the material can be stably and quickly transferred from the material transfer platform 210 to the loading platform 110. Based on this structure, the alignment of the working cycle is mainly achieved between the displacement speed of the first manipulator 1 and the unwinding speed of the tape unwinding device 100, and the cycle of the negative electrode loading device 200 can be slightly higher than that of the first manipulator 1, that is, the feeding time is less than the round-trip time of the first manipulator 1. Compared with the traditional synchronous unwinding that requires the alignment of three dimensions, it is easier to perform relevant calibration work, reduce the cycle gap, and effectively improve the overall efficiency of the equipment.

[0019] Similarly, the positive electrode loading device 300 is aligned with the position of the diaphragm unwinding and dispensing device 400, and the second manipulator 2 is used to transfer the material from the positive electrode loading device 300 to the diaphragm unwinding and dispensing device 400.

[0020] Specifically, the diaphragm unwinding and dispensing device 400 is arranged downstream of the tape unwinding device 100, and the direction of unwinding the diaphragm of the diaphragm unwinding and dispensing device 400 is the same as the unwinding direction of the tape, which is the length direction of the equipment; the positive electrode loading device 300 is arranged on the side of the diaphragm unwinding and dispensing device 400, and the positive electrode loading device 300 and the negative electrode loading device 200 are on the same side in the width direction of the equipment. The positive electrode loading device 300 and the negative electrode loading device 200 have the same structure, and the only differences are their positions and the materials they transfer.

[0021] It is easy to understand that the diaphragm unwinding and dispensing device 400 includes a second loading platform 410, which is aligned with the second material transfer platform 310 of the positive electrode loading device 300, and the second manipulator 2 is used to transfer the positive electrode assembly.

[0022] It should be noted that, in order to reduce the difficulty of beat calibration, the feeding direction of the negative electrode feeding device 200 is the same as the tape unwinding direction, that is, the length direction of the equipment, while the feeding direction of the positive electrode feeding device 300 is perpendicular to that of the negative electrode feeding device 200, that is, the width direction of the equipment. The purpose of this setting is to reduce the occupancy of the equipment length space and achieve the purpose of reducing the volume. Specifically, based on the determined tape unwinding speed of the upstream and the feeding speed of the negative electrode, the diaphragm unwinding speed of the diaphragm unwinding and dispensing device 400 must be the same as the tape unwinding speed, and the positive electrode assembly and the negative electrode assembly need to be stacked at the same position. Therefore, only the beat of the positive electrode feeding device 300 needs to be set to be the same as that of the negative electrode feeding device 200, without secondary calibration, and there is no need to set the feeding direction to the length direction of the equipment like the negative electrode feeding device 200.

[0023] After the raw materials pass through the above four devices, a four-layer structure is formed, which from top to bottom are the positive electrode assembly, the diaphragm, the negative electrode assembly, and the tape. Subsequently, after cutting, folding, and gluing according to the pre-set beats, the finished product is discharged.

[0024] Furthermore, the cutting device 500, the folding device 600, the gluing device 700, and the discharging detection device 800 are sequentially arranged at the downstream position of the diaphragm unwinding and dispensing device 400, corresponding to cutting, folding, gluing, and discharging in the traditional process respectively.

[0025] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the equivalent embodiments by using the above-disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A lithium-manganese composite machine, characterized in that: It includes a tape unwinding device, a negative electrode feeding device, a positive electrode feeding device, and a diaphragm unwinding and dispensing device; it also includes a first manipulator and a second manipulator; The unwinding direction of the tape unwinding device is the length direction of the equipment, and the feeding direction of the negative electrode feeding device is the same as the tape unwinding direction, and the two are arranged in parallel; the end of the tape unwinding device is a bearing table, and the end of the negative electrode feeding device is a material transfer table; the positions of the bearing table and the material transfer table are aligned; the first manipulator shuttles between the bearing table and the material transfer table for transferring the negative electrode assembly from the material transfer table to the tape on the bearing table; The unwinding direction of the diaphragm unwinding and dispensing device is the same as the tape unwinding direction, and the diaphragm unwinding and dispensing device is arranged downstream of the tape unwinding device; the feeding direction of the positive electrode feeding device is perpendicular to the unwinding direction of the diaphragm unwinding and dispensing device; the end of the diaphragm unwinding and dispensing device is a second bearing table, and the end of the positive electrode feeding device is a second material transfer table; the positions of the second bearing table and the second material transfer table are aligned; the second manipulator shuttles between the second bearing table and the second material transfer table for transferring the positive electrode assembly from the second material transfer table to the diaphragm on the second bearing table.

2. The lithium manganese composite machine according to claim 1, characterized in that: It also includes a cutting device, a folding device, a tape pasting device, and a blanking detection device that are sequentially arranged downstream of the diaphragm unwinding and dispensing device.

Images