Lithium ion pole piece rolling constant-pressure device

Abstract

The invention discloses a lithium ion pole piece rolling constant-pressure device. The device comprises an oil tank, a pipeline switch, an electronic plunger valve, a filter, a hydraulic platform, a pipeline valve, an electronic butterfly valve, a regulating valve, a high-pressure pipeline, a rolling structure and a PID servo controller. The hydraulic platform is provided with an overflow valve, an anti-explosion valve, a return pipe, an external pipe, an energy storage tank and a hydraulic output pipe. The filter supplies filtered and purified hydraulic oil to the hydraulic platform, and the hydraulic platform is provided with pressure stabilizing devices such as the overflow valve, the anti-explosion valve and the energy storage tank; and the PID servo controller carries out PID valve adjustment according to the program logic controller to keep the pressure constant. A real-time monitoring and real-time adjusting mode is utilized to ensure the constancy of the pressure of the pipeline. The pressure supply speed and frequency are calculated through real-time calculation including a consumed pressure time curve, the magnitude of supply pressure and the magnitude of pressure received by the tail end (or the process loss amount). The device has the technical advantages that pressure control is accurate, the corresponding speed is high, and pressure changes are adjusted in real time.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion battery pole piece rolling device. Background technique [0002] In the manufacture of lithium-ion batteries, during the production process of the pole pieces, the positive and negative pole pieces need to be compacted by rotating the round rollers at a constant pressure. According to the requirements of the battery manufacturing process, the thickness of the single battery cell does not exceed the standard, and the liquid seepage performance Good, does not affect the performance of the material, if the rolling pressure is too large or too small, the product rolling process exceeds the above specifications, the thickness of the battery will be affected, and even the penetration of the electrolyte will be affected, resulting in the failure of the battery to exert its capacity or Due capacity. [0003] At present, the thickness of the battery pole piece...

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Problems solved by technology

[0004] In order to solve the existing technical problems, the device of this constant voltage system mainly solves the problem that the thickness of the battery pole piece after rolling is not high due to the large pressure range of the roll or the low precision during the rolling process of the lithium-ion battery and the polymer battery pole piece. Uniformity, affecting product quality, product consistency issues

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