Abstract

ESCUDERO-QUINTERO, Cristian et al. Design and Digital Control of an Interleaved Boost Converter for Battery Charge/Discharge. TecnoL. [online]. 2021, vol.24, n.50, pp.4-21.  Epub Mar 01, 2021. ISSN 0123-7799.  https://doi.org/10.22430/22565337.1556.

According to the literature, battery ripple current is one of the phenomena that most significantly affect the state of health of batteries. Therefore, this paper presents a methodology to design a digital control in order to reduce such ripple current, which is injected by means of converters that process the charge and discharge energy. The strategy was designed for and implemented in an interlaced converter. The implemented methodology is presented in four stages: (i) modelling the battery-converter-charge system; (ii) designing the digital control based on the model; (iii) designing the practical implementation, where the instrumentation and implementation stage is presented using an embedded device; and (iv) practical validation of the operation of the strategy and the reduction of battery ripple current. The methodology presented here produced a correct performance of the digital control, fulfilling the design parameters of different operation modes and reducing the ripple current in the battery between 50 and 65%. This reduction protects the battery’s useful life and the sources or loads connected to the system. Additionally, it allows the state-of-charge and health estimation algorithms to increase their accuracy, which leads to an improvement in maintenance protocols and the planning of element replacement.

Keywords : Interleaved converter; boost converter; battery; digital control.

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