Battery cell circulating supply outer plate lamination production line and production process thereof

Abstract

The invention discloses a battery cell circulation supply outer plate lamination production line and a production process thereof, the battery cell circulation supply outer plate lamination production line comprises a pole piece supply mechanism, a film supply mechanism, an outer plate supply mechanism, a lamination mechanism and a blanking mechanism, the pole piece supply mechanism is horizontally arranged on a machine table, and is perpendicular to one side edge of the machine table to extend outwards; the outer plate supply mechanism is arranged on the other side of the machine table; the lamination mechanism is arranged at the side part of the pole piece supply mechanism; the film supply mechanism is erected above the lamination mechanism; and the discharging mechanism is arranged at the side part of the lamination mechanism and is used for carrying and discharging the battery cells formed after lamination. Closed-loop circulation supply of the outer plates is achieved, the outer plates are automatically clamped and fixed and loosened through single power, the carrying stability of the outer plates is effectively guaranteed, meanwhile, alternate film drawing, pressing and covering and automatic cutting-off of the laminated diaphragms are achieved, the surface flatness of the diaphragms during lamination is effectively guaranteed, and the lamination efficiency is improved.

Description

technical field [0001] The invention relates to the field of lithium-ion power batteries, in particular to a production line and a production process for circulating electric cores for outer plate laminations suitable for the manufacturing process of pole pieces of lithium-ion power batteries. 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 w...

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.

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