Liquid injection process and device of aqueous power battery

Abstract

The invention belongs to the technical field of an aqueous power battery, and particularly relates to a liquid injection process and device of the aqueous power battery. A battery to which a liquid is not injected moves to a feeding weighing device with a front automated guided vehicle (AGV) for weighing, a feeding manipulator grabs and places a single battery in a tray groove of the liquid injection device, the battery is driven to move to a part below a liquid injection nozzle by a tray, the liquid injection nozzle is used for performing normal-pressure liquid injection on the battery, nitrogen purging is performed on the liquid injection nozzle after liquid injection is completed, the battery moves with the tray, a discharging manipulator grabs and places the battery on a rear AGV on a discharging weighing device for weighing, and assembly is finally performed. With the adoption of a weight increase method and a weight reduction method, high accuracy is achieved, and the operation is simplified; with the adoption of normal-pressure liquid injection, the liquid injection speed is fast, and a liquid injection battery is prevented from being deformed; by employing nitrogen pulse purging, frequent cleaning is not needed; and voltage measurement and scanning are integrated, the liquid injection quantity before and after injection and pressure difference change are integrated to a central controller, and the technical problems of cleaning and data integration are solved.

Description

technical field [0001] The invention belongs to the technical field of water system power batteries, and in particular relates to a liquid injection process and device for water system power batteries. Background technique [0002] With the acceleration of urbanization, the construction of smart cities characterized by electrification is changing with each passing day. Due to the advantages of reasonable energy density and appropriate power density, wide operating temperature range, long cycle life, environmental protection and recyclability, and high safety, water-based power batteries are widely used in special equipment, starting power supplies, electric vehicles, hybrid vehicles, DC power supplies, It has broad application prospects in energy storage power stations, light rail, high-speed rail, and bullet trains. [0003] Aqueous prismatic batteries generally include a prismatic battery case, cells and an aqueous electrolyte housed in the battery case. The production m...

AI Technical Summary

Problems solved by technology

Due to the lack of direct measurement of the battery voltage before and after the production process, the top fixture moves back and forth, and the parallel reflow of the carrier and the laser coding 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 required, and the production cost is high due to the interlocking of the overall station of the liquid injection equipment. At the same time, the vacuum liquid injection square battery has the problem of battery deformation and electrolyte sticking around the liquid injection port, which not only affects the product quality, but also Also increased the liquid injection port scrubbing process

[0005] Recently, the patent CN102945943AA discloses a linear liquid injection machine for capacitor batteries and its liquid injection method, but due to manual operation and high weight of the single battery, it is very difficult to push it manually, especially when there are multiple batteries. There will be great differences in the physical fitness of operators, which is not conducive to large-scale production and does not meet the quality of power battery production; another latest patent CN106602153A discloses a method for injecting electrolyte. Due to the large volume of power battery monomers, vacuum The extraction time is very long, even if the liquid is injected in a vacuum, the electrolyte splash at the liquid injection port due to the vacuum is easy to damage the internal pole pieces. Although the addition of a centrifuge can prevent the electrolyte from flowing at the liquid injection port, the overall device is complicated and bulky, requiring maintenance. cost will increase significantly

Images