Automated stand for the electrical testing and diagnostics of resource characteristics of the lithium-ion accumulators

• Main Authors: Kopylov, Evgeniy, Lobanov, Dmitriy, Mizrakh, Enis, Oreshenko, Tatyana
• Format: Conference Proceeding
• Language: English
• Subjects: Accumulators; Automation; Batteries; Charging; Discharge; Electric energy storage; Electric potential; Electrical loads; Energy conversion; Energy storage; Lithium; Lithium ions; Power supply; Space vehicles; Stabilization; Topology; Transformers; Voltage
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0193457

Lithium-ion accumulators are widely used as electric energy storage devices in power supply systems of the space vehicles. Authors consider the automated stand for electrical testing and diagnostics of the resource characteristics of lithium-ion accumulators, on the basis on the lithium-ion accumulators of a power supply systems of space vehicles are developed. Life-cycle tests of lithium-ion accumulators are the most time-consuming and lengthy. It is carried out on the ground for several months with multiple cyclic reproductions of charge/discharge modes and battery temperatures until the conditions for completing tests are reached with periodic monitoring, measurement and recording of the lithium-ion accumulators parameters. The use of an automated stand that allows carrying out life tests of lithium-ion accumulators, which based on the dynamic stress testing technique makes it possible to reduce the time of life-cycle testing of the lithium-ion accumulators and by that significantly speed up the design and development of the lithium-ion accumulators and the power supply systems of space vehicles. The structure, description of the components and technical characteristics of the stand, which allows electrical testing of twelve Lithium-ion accumulators simultaneously, are given. The principle of operation and technical characteristics of the original charging-discharging device with a load converter, which forms the basis of the stand, are considered. The proposed original topologies of the original charging-discharging device with a load converter, with two-stage power conversion and input voltage stabilization of the bridge transformer converter make it possible to automate the process of electrical testing of еру lithium-ion accumulators by automatically reproducing the functionally necessary testing modes and to ensure energy saving in charge-discharge modes batteries. For the charging-discharging device with a load converter with two-stage power conversion, it is shown that application of the bridge transformer converter input voltage stabilization makes it possible to impart the following positive properties to the load converter, such as expansion of control ranges of the lithium-ion accumulators attributes (current, voltage, power) and also weak dependence of the static error of stabilization of the lithium-ion accumulators attributes and indicators of the quality of transient processes on the type of load of the load converter.