Cylindrical lithium battery production equipment and cylindrical lithium battery production method

Abstract

The invention relates to the technical field of lithium battery production, and discloses cylindrical lithium battery production equipment. The equipment comprises a rack, and a bottom welding device,a turntable jig device, a diaphragm mounting device, a conveying device and a dispensing device which are mounted on the rack, wherein the bottom welding device is connected with the conveying device, the conveying device is arranged on the side of the turntable jig device, the diaphragm mounting device corresponds to the turntable jig device, and the dispensing device corresponds to the middle part of the conveying device. The equipment has the advantages that a separable copper bar is adopted as the welding electrode, the spot bottom welding position of a negative tab is accurate, the rigidity of the conveying mechanism is high, and the welding efficiency is high; the roundness of a battery shell is detected, a positive tab is straightened, the shape precision is high, and subsequent processing is facilitated; a diaphragm is processed by a double-station conforming die, so that the forming and assembling efficiency is improved; the forming effect is good, the battery is prevented from rolling over, the dispensing efficiency is high, and the conveying is convenient.

Description

technical field [0001] The invention relates to the technical field of lithium battery production, in particular to a cylindrical lithium battery production equipment and production method. Background technique [0002] Bottom welding is an indispensable step in the production process of lithium-ion batteries. From the production of batteries to the assembly of battery packs, spot welding devices are inseparable. Especially in the production of cylindrical lithium-ion batteries, spot welding is an important process in the production. The quality of spot welding at the bottom of cylindrical lithium-ion batteries directly affects the quality of the batteries. Once a false weld occurs during the welding process of the bottom of the battery, it will lead to an increase in the internal resistance of the battery, and it will cause the battery to be scrapped, which will directly affect the safety of the battery and the product qualification rate in the production process. The vene...

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Problems solved by technology

[0006] The purpose of the present invention is: in the prior art, it is difficult to insert the internal tab welding electrode of the cylindrical battery, the welding success rate is low, and the bottom tab welding is difficult; the battery transportation and circulation efficiency is low, and the battery shape is unqualified, resulting in difficulty in diaphragm assembly. The battery with the installed separator has not been separated from good and defective products, which affects subsequent processing; the shape of the separator paper needs to be punched for the positive electrode ear to pass through, and the shape needs to be cut to successfully fit into the battery case. The shape cutting is complicated, and the separator paper is placed It solves the difficulty of forming the side groove of the cylindrical battery, which is easy to deform the battery shell and affects the quality of the battery; the battery dispensing needs to be clamped to find the center, and the dispensing efficiency is low; the battery is placed between different positions Due to the low efficiency of inter-circulation, it is often necessary to set up complex fixtures. A detachable copper rod is proposed as the welding electrode, the position of the bottom welding of the negative electrode ear point is accurate, the rigidity of the conveying mechanism is high, and the welding efficiency is high; the detection circle of the battery case High precision, straight pressing on the positive ear, high shape accuracy, and convenient for subsequent processing; the diaphragm adopts double-station conforming mold processing, which improves the efficiency of forming and assembly; rolling groove forming, using cam pressure, the forming effect is good, preventing battery Rollover, high dispensing efficiency, and easy-to-transport cylindrical lithium battery production equipment and production method

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