Linear liquid injection machine for capacitance battery and liquid injection method thereof

Abstract

The invention relates to a linear liquid injection machine for a capacitance battery and a liquid injection method thereof. The liquid injection machine comprises a rack, wherein a front weighing device, a front voltage measurement device, a linear guide way, a back voltage measurement device and a back weighing device are sequentially arranged on the rack, a normal-voltage liquid injection device is arranged on the rack arranged at one side of the linear guide way, and a tray is arranged on the linear guide way. The liquid injection method comprises the following steps of: weighing the weight of the battery which is not injected with liquid, and measuring the voltage; putting the battery with normally-tested voltage which is not injected with liquid into the tray, and pushing to the normal-voltage liquid injection device; computing the liquid injection quantity, and sequentially injecting liquid into a liquid injection barrel through a hibar pump till the required liquid injection quantity is reached; carrying out the normal-voltage liquid injection on the battery; weighing the weight of the liquid-injected battery, and measuring the voltage; and pushing the tray back to an initial position through the guide way, and resetting a positioning device to complete the one-time cycle of injected liquid. According to the invention, the whole operation is linear, the invention is high in work efficiency, and the functions of on-line voltage detection, normal-voltage liquid injection and on-line liquid compensation can be realized.

Description

technical field [0001] The invention relates to a linear liquid injection machine and its liquid injection method for capacitor batteries, in particular to a linear liquid injection machine and its liquid injection method for the manufacture of water system square batteries, which belong to the new energy power battery manufacturing technology field. Background technique [0002] Aqueous prismatic batteries generally include a prismatic battery case, cells and an aqueous electrolyte housed in the battery case. The production method is generally to alternately superimpose the positive electrode, the diaphragm and the negative electrode to form a battery cell, put the battery cell into the shell, seal the top cover, and set a liquid injection hole on the top cover, and use the liquid injection device to electrolyze the water system from the liquid injection hole. Liquid is injected into the battery case. The electrolyte is an important component of the battery, so the liquid...

AI Technical Summary

Problems solved by technology

Due to the lack of direct measurement before and after the battery voltage in the production process, the liquid injection volume cannot be found online and replenished in time, and the parallel return of the carrier and the laser coding and scanning device are added, resulting in a complicated overall station of the equipment, and the short-circuit battery cannot be picked out in time , so not only more manpower is needed in production, but also the production cost is high due to the interlocking of the overall station of the liquid injection equipment. At the same time, the square battery with vacuum liquid injection has problems such as battery deformation and electrolyte sticking around the liquid injection port. It not only affects the product quality, but also increases the scrubbing process of the liquid injection port

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