Battery separator manufacturing system for 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 for rechargeable batteries and a manufacturing method thereof. The system includes 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 includes step s1, feeding and pre-processing of raw materials; step s2, extrusion molding of the mixture; step s3, casting treatment and cooling to form a base film; step s4, heat treatment of the base film to form heat-finishing the film; step s5, stretching the heat-finishing film to form a microporous film. The invention detects and adjusts the temperature in the manufacturing process of the battery diaphragm by setting the detection module and the control module, so as to accurately control the temperature of each technological process in the manufacturing process, and effectively realize that the battery diaphragm can be set according to the setting during the manufacturing process. The temperature is processed to ensure that the battery separator forms a uniform microporous structure at a 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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