Design and Prototype Modelling of a CC/CV Electric Vehicle Battery Charging Circuit

摘要

Number of electric vehicles is expanding rapidly. Electric vehicle recharging stations are also becoming common. The charging converters in EV charging stations can be off-board type or on-board type with either unidirectional or bidirectional power flow. The most commonly preferred are off-board chargers with unidirectional power flow are mostly used and favored due to their less hardware requirements. Most of the EVs use lithium-ion batteries due to their higher efficiency and less weight and size. The chargers for lithium-ion batteries have battery management systems (BMS) which follow various charging algorithm. Among various charging algorithms for lithium-ion batteries the most widespread and commonly used is CC/CV algorithm. This paper presents a hardware model of an off-board unidirectional charging circuitry utilizing CC/CV charging algorithm.