Dynamic Voltage EV System (DVEVS): Achieving Enhanced Electric Vehicle Efficiency and Performance through switchable Series-Parallel Battery Configuration

The study here investigates on the Electric vehicles (EVs), which are often segmented by range or performance, typically offered as distinct entities. Powertrain design also tends to be either settled or performance focused. A significant challenge in the automotive world is the charging time of EVs, a key performance indicator impacting customer convenience. Battery technology is evolving, allowing for potential architectural changes in battery modules over time. Issues such as cell balancing lead to energy wastage in batteries, and thermal management is critical as increased current causes higher I2R power losses and heat generation. Battery weight negatively affects EV efficiency and range. Adapting to new battery cell technologies and architectures can be costly. Addressing these challenges, this paper presents on Dynamic Voltage EV System (DVEVS) as a solution to enhance EV efficiency by dynamically adjusting battery voltage based on driving conditions. Such as Utilizing a smart Battery Management System (BMS) and advanced power electronics with a novel switching mechanism by series and parallel connections in cells, cell modules and other configurations, potentially simplifying the system and reducing the need for components like DC-DC converters for different Electric Vehicle Supply Equipment (EVSE). DVEVS connects cell modules in series for high-power demands (acceleration, uphill driving) and in parallel for efficient cruising, optimizing energy consumption and potentially improving energy efficiency by reducing powertrain and battery system losses. By effectively managing voltage levels, Notably, series connection during charging enables fast charging, minimizing downtime by increasing higher potential difference, charging time can be drastically reduced by charging individual cells or cell module rather than a parallel connection. DVEVS aims to increase driving range and overall EV performance, offering a more adaptable and efficient EV architecture that addresses current limitations and advances electric mobility. • Switching from series to parallel or vice versa based on the performance or efficiency mode. Charging time can be lower compared to fixed series and parallel connections. • Cell balancing can be easy without power loss and active state can be achieved. • DC -DC converter and electric vehicle supply equipment can be reduced.