Diaphragm drying device and method

Abstract

The invention discloses a diaphragm drying device. The device comprises a diaphragm, an unwinding mechanism, a winding mechanism and a microwave baking mechanism; the microwave baking mechanism is located between the unwinding mechanism and the winding mechanism; and the diaphragm penetrates through the microwave baking mechanism. The invention also discloses a diaphragm drying method. According to the diaphragm drying method, a diaphragm is unwound in a preset environment; the diaphragm is directionally heated through a microwave generator, so that water molecules contained in the diaphragm can diffuse into the environment and to be absorbed through a dehydrator; and the diaphragm is wound. With the microwave baking mode adopted, the water can rapidly diffuse outwards from the diaphragm,and the diaphragm will not be damaged; and with the unwinding mode adopted, the diaphragm can be efficiently, quantitatively and uniformly dried. The diaphragm drying device has the advantages of structural simplicity and low cost.

Description

technical field [0001] The invention relates to a diaphragm processing device and a method thereof, in particular to a diaphragm drying device and a method thereof. Background technique [0002] Lithium battery separator is one of the four key materials of lithium batteries. It is the material that connects and separates the positive and negative electrodes of the battery. It is an electronic insulator that can prevent short circuits, but allows lithium ions to pass through. Pores function to block current conduction in the battery. The performance of the separator determines the interface structure and internal resistance of the lithium battery, which in turn affects the key characteristics of the battery such as capacity, cycle life, and charge-discharge current density. Therefore, the improvement of the performance of the separator plays an important role in improving the overall performance of the battery. [0003] At present, the drying process steps in the production ...

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Problems solved by technology

[0003] At present, the drying process steps for the production of separators are mainly baked together with the active materials after stacking the cells; as the demand for energy density is getting higher and higher, the implantation of some new processes and procedures may lead to , can not be baked at high temperature; if it is baked before, it may cause the diaphragm to shrink and curl, which not only affects the appearance and quality of the diaphragm, but also may cause dangers such as short circuit of the battery cell

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