Lamination diaphragm covering device and film covering and tension detecting process thereof

Abstract

The invention discloses a lamination diaphragm covering device and a film covering and tension detecting process thereof. The lamination diaphragm covering device comprises a linear module, a film covering mechanism and a film guiding mechanism. The linear module is horizontally arranged below a diaphragm unwinding mechanism. The film guiding mechanism is arranged on the side wall of the linear module. The film covering mechanism is slidably connected to the bottom of the linear module. The film covering mechanism comprises a driving assembly and a detection film pressing assembly. The driving assembly is connected to the bottom of the linear module. The detection film pressing assembly is connected to the driving assembly. The detection film pressing assembly automatically presses a diaphragm extending downwards from the film guiding mechanism, and when the linear module drives the detection film pressing assembly to linearly move back and forth on a lamination platform, the detection film pressing assembly detects the acting force generated by pulling of the diaphragm from the left side and the right side in real time. According to the invention, circulating and uninterrupted Z-shaped film covering of a strip-shaped diaphragm is realized through automatic flexible clamping of the diaphragm, and the film covering flatness is effectively ensured through film covering surface detection, real-time detection of internal tension of the diaphragm and arc-shaped swing type film drawing adjustment.

Description

technical field [0001] The invention relates to the field of automation equipment, in particular to a laminated diaphragm-covered device and its film-covering and tension detection process. Background technique [0002] Lithium battery refers to batteries containing lithium in the electrochemical system, including metal lithium, lithium alloys, lithium ions, and lithium polymers. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium battery is a rechargeable battery that mainly relies on lithium ions to move between positive and negative electrodes to work. During charging and discharging, lithium ions intercalate and deintercalate back and forth between the two electrodes: when charging the battery, lithium ions are deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during disch...

AI Technical Summary

Problems solved by technology

The film covering device needs to solve the following technical problems: 1. The problem of flexible clamping of the diaphragm. The film covering process requires the diaphragm to be clamped so that the diaphragm can be pulled out from the roll and covered on the surface of the pole piece. The lamination mechanism of the lamination platform presses one side of the diaphragm, and the lamination device needs to pull the diaphragm to the other side of the lamination platform for lamination, so that the Z-shaped lamination is performed in a cycle, which requires a flexible clamping film to maintain In the state of clamping the diaphragm, the film is circulated back and forth on both sides of the lamination platform; 2. The problem of the flatness of the film surface. When the strip diaphragm is pulled out and covered on the pole piece, it is necessary to ensure the flatness of the diaphragm surface after film coating. Factors affecting the flatness include the position and angle of the coating device, and the unevenness of the surface due to the internal tension of the diaphragm, etc.

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