Linear type laser-beam welding machine of capacitance battery and welding method of linear type laser-beam welding machine

Abstract

The invention relates to a linear type laser-beam welding machine of a capacitance battery and a welding method of the linear type laser-beam welding machine. The linear type laser-beam welding machine comprises a working platform, a front placing platform, a transmission device, a rear placing platform, a welding mechanism and a control panel, wherein the control panel is internally provided with a function control module. The welding method comprises the following steps of placing a to-be-welded battery workpiece which is placed on the front placing working platform in a locating device on the transmission device, starting the control panel, controlling a conveyor belt to move, and welding the front half part and the rear half part of the battery workpiece. According to the linear type laser-beam welding machine and the welding method, disclosed by the invention, the linear type operation is realized, the design is simple, the process layout is reasonable, and continuous feeding and locating can be carried out; the distance can be automatically fixed during a feeding process, the locating time of a photograph detection device is shortened, and the automation efficiency is increased; the moving distance of a laser welding head is shortened, the cooling time of a welding workpiece is enough, and the welding quality is increased; and a pole can be recycled and reused after the battery is scraped, and the manufacturing cost of the laser-beam welding machine is further reduced.

Description

technical field [0001] The invention relates to a linear laser welding machine for a capacitor battery and a welding method thereof, in particular to a linear laser welding machine and a welding method for connecting a current collector and a pole of a water system square battery, and belongs to new energy power The field of battery manufacturing technology. Background technique [0002] Capacitor batteries have high-current charging and discharging characteristics, and the quality of the connection between the positive and negative current collectors and poles directly affects the input and output of high currents. Therefore, improving the connection quality will help improve the rapid charging and discharging capabilities of power batteries. [0003] At present, the welding for the connection between the current collector and the pole used to manufacture the water-based square battery in the market is done manually or semi-automatically, and linear automatic production can...

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Problems solved by technology

[0003] At present, the welding for the connection between the current collector and the pole used in the manufacture of water-based square batteries in the market is done manually or semi-automatically, and linear automatic production cannot be realized.

Existing production lines for connecting positive and negative current collectors and poles usually use the following five methods: nut fastening, resistance welding, argon arc welding, ultrasonic welding, and vacuum electron beam welding; nut fastening has a greater connection risk , is basically not used in the field of power batteries; resistance welding operation is time-consuming, and the shape of large-scale battery current collectors and poles is complex and the space is limited, so there are defects that it is difficult to implement resistance welding locally; the heat of argon arc welding workpieces is large, and special cooling devices are required. The part is suddenly cooled and hot, and there are local cracks, and the welded workpiece is difficult to recycle; ultrasonic welding is often used in lithium-ion batteries, but the current collector and pole of the aqueous battery are refractory materials, the thickness is large, and the service life of the welded joint is short. The defect is not conducive to large-scale production; the electron beam vacuum welding chamber needs vacuum, and the power battery is large in size, and the number of batteries that can be accommodated at one time is limited, and the vacuum device is turned on repeatedly, and the efficiency is low

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