Magnetic suspension type battery cell manufacturing production line and battery cell manufacturing process thereof

Abstract

The invention discloses a magnetic levitation type battery cell manufacturing production line and a battery cell manufacturing process thereof, the magnetic levitation type battery cell manufacturing production line comprises a horizontally arranged machine table, and further comprises a pole piece feeding mechanism, a magnetic levitation feeding platform, a lamination platform, a film supply mechanism and a battery cell discharging mechanism, and the pole piece feeding mechanism is arranged on one side of the machine table and horizontally extends to the machine table; the magnetic levitation feeding platform is arranged on the machine table, and a closed-loop conveying path is formed on the magnetic levitation feeding platform. The lamination platform is arranged at the side part of the magnetic suspension feeding platform; the film supply mechanism is erected above the lamination platform; and the battery cell discharging mechanism is arranged on one side of the lamination platform. According to the invention, pole pieces are circularly fed along a closed-loop path during lamination, the continuity of pole piece feeding is ensured, the pole piece feeding efficiency is improved, automatic export of a diaphragm belt, diaphragm pulling and automatic deviation correction, buffering and tension control of the diaphragm in the export process are realized, the position precision of the diaphragm and the consistency of internal tension are effectively improved, and the production efficiency is improved. And single-power automatic flat pressing and covering of the diaphragm during lamination are realized.

Description

technical field [0001] The invention relates to the field of lithium-ion power batteries, in particular to a production line for manufacturing magnetic floating batteries and a manufacturing process for batteries suitable for lithium-ion power battery pole pieces. Background technique [0002] Lithium battery refers to batteries containing lithium in the electrochemical system, including metal lithium, lithium alloys, lithium ions, and lithium polymers. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium battery is a rechargeable battery that mainly relies on lithium ions to move between positive and negative electrodes to work. A battery that generally uses a material containing lithium as an electrode is a representative of a modern high-performance battery. As the country vigorously promotes the development of new energy, the demand for lithium-ion power batteries in all walks of life is increasing day...

AI Technical Summary

Problems solved by technology

For the strip lamination process, the positive and negative plates are alternately placed on the lamination platform during lamination, and the strip-shaped diaphragm is pulled back and forth on the lamination platform, and covered on the positive or negative plates after the positive or negative plates are stacked. The surface of the negative electrode sheet is then cut off the diaphragm; in this lamination method, the strip diaphragm is tensioned and pulled back and forth during the lamination process, there is stress inside, and the surface of the diaphragm will wrinkle after cutting, which will affect the quality of the cell

For the single-piece stacking process, the diaphragm is cut into a single-piece structure before stacking. After the positive and negative plates are stacked, the single-piece diaphragm is stacked on the surface of the positive or negative plate to achieve lamination. This lamination process requires many The first time to take the diaphragm and stack the diaphragm, resulting in low lamination efficiency. In order to ensure the position accuracy of each lamination, the diaphragm needs to be aligned before lamination, and the lamination position accuracy is difficult to effectively guarantee.

[0004] For the above strip lamination process, in the process of automatic lamination design, the following technical difficulties need to be solved: 1. The materials involved in the lamination process include positive and negative electrodes and diaphragms. Therefore, the positive and negative electrodes need to be solved first. 2. Similarly, it is necessary to solve the problem of automatic export of the strip diaphragm and the correction of the position of the diaphragm during the automatic export process to ensure that the diaphragm The position accuracy and the internal tension adjustment problem during the diaphragm export process ensure the consistency of the flatness of the diaphragm surface, and the automatic caching problem during the diaphragm export process ensures the internal tension consistency during the subsequent film pulling, and the diaphragm automatically moves back and forth on the lamination platform 3. During the lamination process, since the strip-shaped diaphragm needs to be flatly covered on the lamination platform or pole piece back and forth without cutting, the following problems need to be solved when covering the new diaphragm layer The position stability of the covering diaphragm layer avoids pulling up the covered diaphragm layer when pulling the film back and forth, and at the same time, it is necessary to ensure the flatness of the diaphragm covering; 4. When covering the diaphragm back and forth, it is also necessary to solve the problem of covering the diaphragm and lamination mutual interference problem

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