Shape and Measurement Monitoring of Inrush Current Characteristics of a Battery-Capacitive Energy Storage Device with Two-Channel Digital Oscilloscope

The main reason of voltage instability in stand-alone power supply systems is the electric drive motors inrush current, which are usually higher than their nominal value. The most reasonable way to solve this problem is using capacitive energy storage. The purpose of research is shape and measurement monitoring of battery-capacitive energy storage device inrush current characteristics. Parameters comparative analysis for lithium-ion battery (LIB) part and capacitive part of the energy storage device was holding with the twochannel digital oscilloscope.

Measuring testing bench included parallel connected LIB part and capacitive part of the storage device and connected to the power source. The LIB part of the storage device is made on the basis of the ATOM 10 multifunctional motor drive device of the new generation, which contains 15 V lithium-ion battery and 9.4 A·h capacity. The capacitive part of the storage device is the INSPECTOR Booster supercapacitor with an 80 F electrostatic capacitance and 15.5 V voltage. A 12 V AC/DC step-down converter was used as a power source. An electric air automobile compressor M-14001 was used as a current drain. The testing bench measuring part consisted of a two-channel digital oscilloscope and two standard measuring shunts with 15000 μOm resistance serial attached to LIB part and capacitive part of the storage device. Shape and measurement monitoring of inrush current characteristics of LIB part and capacitive part of the energy storage device was held synchronously using a two-channel digital oscilloscope with recording data to FAT32 file system USB flash drive. Obtained data was transferred to a personal computer and analyzed.

The measurement results showed that 82.3 % of the energy losses compensation of the motor start is taken over by the capacitive part of the energy storage device, what makes longer LIB’s life. By adjusting the oscilloscope sweep trace index you can analyze more detailed time response shape and its duration. The values of the inrush current amplitudes were calculated in proportion to the voltage drop on the shunts and their resistances.

The developed method for monitoring shape and measurement inrush current characteristics can be used in various technical applications: smart stand-alone photovoltaic system, uninterruptible power supply devices, electric drive control systems, etc.

1. Krasovski V.I., Yacko P.V. Energy storage as devices for improving the operation of the electric power system with renewable energy sources ed technical and applied sciences: Sakharov readings 2020: environmental problems of the XXI century. Belarusian State University, ISEI BSU, Minsk, 2020, рart 2, pp. 393–396 (in Russian). DOI: 10.46646/SAKH-2020-2-393-396

2. Shinyakov Yu.A. Extremal regulation of automatic space vehicle solar battery power. VESTNIK of the Samara State Aerospace University, 2007, no. 1(12), pp. 123–129 (in Russian). DOI: 10.18287/2541-7533-2007-0-1(12)-123-129

3. Kulikov Y.A. Electrical energy storage – effective tool of power systems operation control. Electric power industry young people’s view– 2018. Kazan State Power Engineering Institute, 2018, рart 1, pp. 38–43 (in Russian).

4. Kötz R., Sauter J.C., Ruch P., Dietrich P., Büchi F.N., Magne P.A., Varenne P. Voltage balancing: long-term experience with the 250 V supercapacitor module of the hybrid fuel cell vehicle HY-LIGHT. Journal Power Sources, 2007, no. 174, pp. 264–271. DOI: 10.1016/j.jpowsour.2007.08.078

5. Weingarth D., Foelske-Schmitz A., Kötz R. Cycle versus voltage hold: which is the better stability test for electrochemical double layer capacitors? Journal Power Sources, 2013, no. 225, рр. 84–88. DOI: 10.1016/j.powsour.2012.10.019

6. Mars P. Coupling a supercapacitor with a small energy harvesting source. EDN Journal, June 2012.

7. Diab Y., Venet P., Gualous H., Rojat G. Self-discharge characterization and modeling of electrochemical capacitor used for power electronics applications. IEE Trans Power Electron, 2009, no. 24, pp. 511–517. DOI: 10.1109/TPEL.2008.2007116

8. Lazzari M., Soavi F., Mastragostino M. Dynamic pulse power and energy of ionic-liquid-based supercapacitor for HEV application. Journal of The Electrochemical Society, 2009, no. 156, pp. 661–666. DOI: 10.1149/1.3139046

9. Vasilevich V.P., Grickevich V.S., Kosmach V.V., Belyaev A.V., Zbyshinskaya M.E., Ermakov A.I. Supercapacitor as an energy storage of a photovoltaic converter. BSUIR Repository, 2016. ISSN: 2410-4655.

10. Thounthong P., Chunkag V., Sethakul P., Sikkabut S., Pierfederici S., Davat B. Energy management of fuel cell/solar cell/supercapacitor hybrid power source. Journal of Power Sources, 2011, vol. 196, no. 1, pp. 313– 324. DOI: 10.1016/j.jpowsour.2010.01.051

11. Berdnikov R.N., Fortov V.E., Son E.E., Denʼshchikov K.K., ZHuk K.E., Novikov N.L., SHakaryan Yu.G. Hybrid electric power storage for ENES based on Li-ion batteries and supercapacitors Energy of Unified Grid. Scietnific and Technical Journal, 2013, no. 2(7), pp. 40–51 (in Russian).

12. Marenkov S.A. Hybrid accumulator of electricity for networks with distributed generation based on renewable sources of electrical energy. International Research Journal, 2017, vol. 2(56), part 3, рр. 120–123 (in Russian). DOI: 10.23670/IRJ.2017.56.007