Die cutting lamination system and method

Abstract

The invention provides a die cutting lamination system and method. The system comprises an unwinding mechanism, an anode cutting mechanism, a preheating rolling device, a cutting mechanism, a detection device and a lamination device, wherein the anode cutting mechanism is matched with the anode unwinding mechanism and cuts an anode sheet to obtain a lamination of the anode sheet relative to at least one of a first diaphragm, a second diaphragm and a cathode sheet in interval distribution; the rolling device enables at least two of the first diaphragm, the second diaphragm, the cathode sheet and the anode sheet to be adhered to each other; the lamination is cut by the cutting mechanism to obtain a core lamination unit and a cathode lamination unit, or obtain the core lamination unit, the cathode lamination unit and a diaphragm lamination unit; the detection device detects whether the lamination unit has defects or not; the lamination device is used for laminating the lamination units. The system has the advantages of the relatively simple structure, the high lamination speed, the low failure rate, the small horizontal lamination space occupancy rate, the convenient lamination cutting and the high cutting precision, and the negative influence of the diaphragm on the performances such as internal resistance and specific capacity of the battery is small.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a die-cut lamination system and method. Background technique [0002] In the environment of the automobile industry using traditional energy as power supply, the problem of environmental pollution has aroused people's attention to environmental protection and resource utilization. Actively developing new energy vehicles and realizing the electrification of the automobile industry is a strategic measure to achieve the goal of "overtaking on curves" in foreign automobile industries. Lithium-ion device technology is a key technology for the development of electric vehicles. The square lamination technology is one of the most advanced lithium-ion battery manufacturing technologies at present. Among them, the lamination speed directly determines the production capacity of the whole line and the manufacturing cost of the battery cell. [0003] At present, most of them use the z-typ...

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Problems solved by technology

[0003] At present, most of them use the z-type lamination process, but the world’s fastest lamination speed that has been mass-produced is 0.6s / piece. This lamination method is relatively slow, resulting in a large demand for equipment, a large footprint, and high purchase costs. , later maintenance cost and energy consumption are large

There are two main reasons for the slow lamination speed: one is that the laminations are loaded by magazines, and there will be double sheet suction during the feeding process. Therefore, the traditional lamination opportunities include blowing, brushing, shaking, double Devices such as sheet detection are used to prevent double-sheet suction. At present, no matter what method is used, the double-sheet problem cannot be completely eliminated, and these devices have greatly reduced the speed of manipulator feeding; second, the traditional lamination method is first. Stack the negative electrode, then wrap the diaphragm on the negative electrode, then stack the positive electrode, and then wrap the diaphragm on the positive electrode. The stacking unit of this stacking method is a single pole piece or a single diaphragm. Due to the limitation of the mechanical structure, the stacking speed cannot be realized. Substantial improvement

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