«Acoustic waves in layered solid-state structures containing electrolytes and the development of methods for monitoring the technical condition of batteries based on them»
Head: Shamsutdinova E.S.
Abstract.
Monitoring the condition of portable rechargeable batteries (batteries) is an important task of ensuring environmental safety in urban areas and in production. This is due to the ever-growing number of portable appliances used in everyday life and in production, and electric transport in large cities. Such an increase in the number of batteries creates an increased threat to environmental safety. In particular, such threats include leakage of harmful substances, including heavy metals, when the battery is damaged, as well as the possibility of their spontaneous ignition in case of violation of operating conditions. It should be noted that the cost of high-capacity batteries is a significant part of the total cost of the product in which they are used. Thus, the development of equipment (including built-in) for monitoring the state of the battery in real time is an urgent task.This problem is of particular importance in large metropolitan areas, where public and personal electric transport is widespread. To solve this problem, it is necessary to develop a new method for monitoring the condition of the battery during its operation, with the possibility of monitoring its functioning in real time. In most cases, volt-amperometric methods are used to monitor the condition of the battery, which make it possible to determine damage to the battery, leading to a change in its voltage characteristics and capacity. The use of acoustic methods is a promising way to monitor the condition of the battery, since they can be used to detect defects in battery components both at the stage of acceptance of the final product and during its operation. The advantage of using acoustic control methods over voltametric methods of battery diagnostics is the absence of the need to dismantle the battery and connect it to a specialized stand, as well as the non-invasiveness of acoustic methods during analysis. Thus, the aim of the project is to study the interaction of acoustic waves with periodic solidstate structures containing electrolytes, and to develop acoustic methods for monitoring the condition of batteries in real time. To achieve this goal, a theoretical and experimental study of the properties of volumetric acoustic waves propagating in periodic composite structures containing metal, conductive gel (conductive liquids) and matching layers will be carried out. The application of this approach will allow for the first time to develop a mathematical model describing the relationship between the acoustic wave parameters and the properties of battery elements at various stages of the operational cycle. Next, an experimental study of the propagation of volumetric acoustic waves in batteries of various types, which are actually used in electric transport, will be conducted. The data obtained will be used to create a prototype of an acousto-electronic sensor for monitoring the condition of batteries of various types. As a result of the project, data will be obtained on the relationship between the properties of the acoustic wave and the working body of the battery and the condition of its electrodes, which will allow us to conclude about the degree of wear of the battery, as well as the possibility of continuing its further operation. The results obtained will be used to create a prototype battery status sensor based on volumetric acoustic waves.