Macroeconomics

Quantum mechanics

Multiplier (economics)

Voltage

Engineering

Biology

Voltage multiplier

Voltage source

Equalizer

Waveform

Economics

Power (physics)

Computer science

Paleontology

Physics

Energy storage

Electronic engineering

Series (stratigraphy)

Dropout voltage

Channel (broadcasting)

Electrical engineering

Equalization (audio)

IEEE Transactions on Transportation Electrification

Conventional energy storage systems include a bidirectional converter for charging and discharging the series-connected cells and a separate voltage equalizer. In this article, to simplify the system, the equalizer is integrated into the charging and discharging system. Only one magnetic component is required in the proposed integrated architecture, and more importantly, the equalizer no longer needs a separate converter as the driver. The voltage equalizer is composed of a symmetrical voltage multiplier (SVM) and a series-resonant circuit. The equalizer operates in a discontinuous conduction mode (DCM) and can provide a constant equalization current for the energy storage cells. A detailed operation analysis is performed for integrated architecture, and the steady-state characteristics are mathematically derived. The integrated architecture can automatically equalize the cell voltage when the energy storage is charged or discharged. A prototype for six series-connected cells was built and tested to verify the analytical results and demonstrate the properties of the proposed architecture.

Bidirectional Converter Integrating Voltage Equalizer Based on Symmetrical Voltage Multiplier by Sharing a Magnetic Component for Series-Connected Cells