Spot welding system for electrode plates of power battery pack

Abstract

The invention provides a spot welding system for electrode plates of a power battery pack, which comprises a spot welding device and a spot welding jig clamping device which are oppositely arranged side by side and connected with a PLC (programmable logic controller). The spot welding device comprises a bottom plate, a lateral plate, a lifting table, a spot welding mechanism, an X-axis movement mechanism and a Z-axis movement mechanism, wherein the X-axis movement mechanism drives the lifting table to longitudinally move, and the Z-axis movement mechanism drives the spot welding mechanism to transversely move. The spot welding jig clamping device comprises a spot welding jig sliding table, a clamping mechanism and a Y-axis movement mechanism, wherein the clamping mechanism is used for clamping a spot welding jig, the Y-axis movement mechanism drives the spot welding jig sliding table to transversely move, the clamping mechanism is arranged on the spot welding jig sliding table and is perpendicular to the spot welding mechanism, and the Y-axis movement mechanism is connected with the spot welding jig sliding table. Besides, two sliding rails beneficial to sliding of the spot welding jig sliding table are arranged below the spot welding jig sliding table. The spot welding system is an intelligent full-automatic spot welding system, which is high in efficiency, low in consumption and high in welding quality.

Description

【Technical field】 [0001] The invention relates to the technical field of spot welding automation equipment for power battery pack electrodes, and is particularly suitable for spot welding systems for medium and large battery pack electrode tabs such as electric tools and electric vehicles. 【Background technique】 [0002] Large and medium-sized battery packs are mainly used in power tools, notebook computers, electric vehicles and other fields. With the rapid development of electronics, communication and other technical fields, large and medium-sized battery packs are used more and more widely. During the production process of large and medium-sized battery packs, spot welding of battery pack electrode sheets is required. At present, most manufacturers in China use semi-automatic spot welding. Its defect mainly shows in: 1, welding labor intensity is big, and welding efficiency is low. 2. The qualified rate of welding is low, and it is easy to have defects such as virtual w...

AI Technical Summary

Problems solved by technology

Its defects are mainly manifested in: 1. The welding labor intensity is high and the welding efficiency is low.

2. The qualified rate of welding is low, and it is easy to have defects such as virtual welding, deformation of the battery core, bonding of welding needles, uneven solder joints, etc.

3. The special spot welding power supply has a lot of investment and low utilization rate, which increases the cost of equipment

The spot welding devices of the above two patents have defects such as low welding pass rate, easy false welding, deformation of the battery core, bonding of welding needles, and uneven solder joints.

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