Battery diaphragm manufacturing system of rechargeable battery and manufacturing method thereof

Abstract

The invention relates to the technical field of battery diaphragm preparation, in particular to a battery diaphragm temperature control system of a rechargeable battery and a manufacturing method thereof, the system comprises a raw material pretreatment module, an extrusion module, a casting module, a heat treatment module, a stretching module, a detection module and a control module, the manufacturing method comprises the following steps: step s1, feeding and raw material pretreatment; step s2, extrusion molding of the mixture; s3, carrying out curtain coating treatment and cooling to form a base film; s4, carrying out heat transfer treatment on the base film to form a heat finishing film; and s5, stretching the thermal finishing film to form the microporous film. The detection module and the control module are arranged to detect and adjust the temperature in the manufacturing process of the battery diaphragm, so that the temperature in each technological process in the processing and manufacturing process can be accurately controlled, and the battery diaphragm is effectively processed according to the set temperature in the processing process; and it is ensured that the battery diaphragm forms a uniform microporous structure at the preset temperature.

Description

technical field [0001] The invention relates to the technical field of battery diaphragm preparation, in particular to a battery diaphragm manufacturing system for a rechargeable battery and a manufacturing method thereof. Background technique [0002] In the structure of lithium batteries, the separator is one of the key inner components. The performance of the separator determines the interface structure and internal resistance of the battery, which directly affects the capacity, cycle and safety performance of the battery. A separator with excellent performance plays an important role in improving the overall performance of the battery. The main function of the diaphragm is to separate the positive and negative electrodes of the battery, prevent the two electrodes from contacting and short circuit, and also have the function of allowing electrolyte ions to pass through. The separator material is non-conductive, and its physical and chemical properties have a great influe...

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Problems solved by technology

[0006] Therefore, the present invention provides a battery separator manufacturing system and a manufacturing method thereof for a rechargeable battery, which are used to overcome the problem of inaccurate stretching caused by the inability to accurately monitor the set process temperature in the dry uniaxial stretching manufacturing process of the battery separator in the prior art. uniform problem

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