Battery cell flattening device

Abstract

The invention relates to the technical field of battery preparation, and discloses a battery cell flattening device. The device comprises an ultrasonic flattening mechanism arranged on a battery cellconveying path. Ultrasonic flattening mechanisms are respectively arranged at the two ends of the battery cell to synchronously conduct ultrasonic flattening on the two ends of a battery cell, and each ultrasonic flattening mechanism comprises an ultrasonic flattening head, wherein grooves are formed in the ultrasonic flattening heads, and the two ends of the battery cell are correspondingly inserted into the grooves in the ultrasonic flattening heads at the two sides, and the bottoms of the grooves are of a grid-shaped convex surface structure. According to the battery cell flattening deviceprovided by the invention, the grooves are formed in the ultrasonic flattening heads, so that the end parts of the battery cell can be limited, and battery cell materials is prevented from turning outwards, thereby guaranteeing the flattening effect. The grid-shaped convex surface structures at the bottoms of the grooves enable the battery cell materials on the end surface of the battery cell to be uniformly distributed in the grooves, so that the battery cell materials can be better flattened, thereby improving the flattening effect. In addition, the battery cell materials on the end face ofthe battery cell can be fixed and limited, so that the battery cell materials can be in better contact with the ultrasonic kneading heads to prevent outward turning and improve the kneading efficiency.

Description

technical field [0001] The invention relates to the technical field of battery preparation, in particular to a cell flattening device. Background technique [0002] With the development of new energy technology, the lithium battery industry has developed rapidly in recent years. In order to obtain smaller internal resistance and better rate performance, lithium-ion batteries have begun to use end-face welding technology on a large scale. [0003] The end face welding technology is to leave a certain blank foil for the pole piece of the battery, and then use laser welding to weld the tab and the battery together after flattening. After kneading, the surface quality of the welding plane directly affects the welding effect and yield. [0004] The kneading method in the prior art is likely to cause the material of the battery cell to turn out during the process of kneading. Once the material of the battery cell after the material is put into the shell, the edge of the battery ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a battery kneading device, which is used to solve or partially solve the problem that the kneading method in the prior art may easily cause the material of the battery to turn outwards during the process of kneading. Once the material of the battery is turned out After entering the shell, the edge cells turned out will short-circuit with the battery shell, causing battery failure and failure to meet safety standards.

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