Battery electrolyte ultrasonic injection equipment and method

Abstract

The invention discloses battery electrolyte ultrasonic injection equipment and a battery electrolyte ultrasonic injection method. The battery electrolyte ultrasonic injection equipment comprises a base for placing one or more to-be-injected batteries, liquid injection devices which correspond to the corresponding to-be-injected batteries, and an ultrasonic generation device; each liquid injectiondevice comprises a metering pump and a liquid injection needle; and the ultrasonic generation device conducts ultrasonic wave into an electrolyte and an electrode coil in each battery. The battery electrolyte ultrasonic injection equipment and the battery electrolyte ultrasonic injection method have the following advantages: in the electrolyte injection process of the battery and after the batteryis vacuumized and part of or all the electrolyte is injected, ultrasonic wave is applied to the battery, so on one hand, the vacuumizing effect is improved, and on the other hand, the absorbing speedof the electrolyte between the electrodes and in the electrodes is increased; moreover, the injection quantity of the electrolyte is increased, and absorption and wetting on the electrolyte by the electrodes are improved, so that the performance of the battery is improved and the performance uniformity of the battery is improved.

Description

technical field [0001] The invention relates to a battery electrolyte injection device and method, in particular to a battery electrolyte ultrasonically enhanced absorption injection device and method. Background technique [0002] It is often said that the electrolyte is the blood of the battery. In fact, the electrolyte is not just the blood of the battery, because the electrolyte not only plays the role of transporting ions and conducting internal ions in the battery reaction, but in most cases the electrolyte It also participates in the electrode reaction of the battery, that is to say, during the charging and discharging process of the battery, especially during the discharging process, the electrolyte or the components in the electrolyte are actually consumed like the active materials, so the electrolyte in the battery is injected The amount, especially whether there is enough electrolyte in the battery directly affects the battery capacity and discharge performance, e...

AI Technical Summary

Problems solved by technology

[0006] With the pursuit of battery capacity in power lithium battery technology, the plates and separators in the battery are increasingly pursuing the ultimate high density, which not only takes up more space in the battery, but also causes the electrolyte to be trapped in and between the plates. The penetration between the plates is more difficult, so despite the use of vacuum filling and vacuum multiple filling technologies, due to the high density of the battery plate, the penetration of the electrolyte between the plate and the plate is difficult, so the electrolyte filling the problem has always existed

[0007] At the same time, due to the performance fluctuation of the plate, and some problems such as liquid absorption and permeability of the plate, it is difficult to fully achieve satisfactory results by directly adding electrolyte at one time.

[0008] One of the quality problems of the battery is that due to incomplete penetration of the electrolyte in the electrodes, some electrodes fail without electrolyte

This is because as the battery capacity increases, the density and compactness of the electrodes become higher and higher. Due to the limited injection time of the electrolyte, it is impossible to ensure that the electrolyte has sufficient diffusion and penetration time in the battery, resulting in electrolysis. Liquid injection and penetration, poor infiltration

Images