Research at 成人大片A multisource inverter (MSI) structure for electric vehicle applications integrates high- and low-voltage DC sources
Background
Electric vehicles (EVs) are a cornerstone of sustainable transport, addressing both environmental and health impacts associated with internal combustion engines. Traditional energy storage systems in EVs, often based solely on lithium-ion batteries, have limitations, including low power output in high-demand situations, limited lifespan under high charging/discharging cycles, and inefficiencies at low temperatures. To address these challenges, hybrid energy storage systems (HESS) that combine lithium-ion batteries with supercapacitors have emerged. However, conventional HESS configurations require bulky DC-DC converters, which increase both system weight and complexity, limiting overall efficiency and flexibility.
Technology Overview
This novel multi-source inverter (MSI) design eliminates the need for DC-DC converters by integrating high- and low-voltage DC sources directly into a three-phase inverter for seamless DC-AC conversion. By leveraging a modified space vector modulation (SVM) strategy, the MSI provides four discrete voltage levels at the inverter鈥檚 output, allowing flexible distribution of load power between the battery and supercapacitor. This modular setup also enables active control of each source鈥檚 output based on real-time load requirements and the state of charge (SOC) of the auxiliary source. Through careful design, the MSI topology requires fewer semiconductor devices in the current path, significantly reducing conduction losses and boosting efficiency across all operating modes.
Benefits
- Enhanced Efficiency: By eliminating the need for DC-DC converters and reducing the number of conducting semiconductor devices, the MSI provides a highly efficient power conversion process, ideal for EV applications.
- Reduced Weight and Complexity: The MSI鈥檚 single-stage design without magnetic components minimizes overall system weight and simplifies the powertrain.
- Extended Battery Life: The intelligent management of power flow reduces stress on the main battery during peak loads, prolonging its lifespan and lowering maintenance costs.
- Flexible Power Management: The MSI can dynamically adjust power levels from each source, optimizing performance across different driving conditions (e.g., low speeds, regenerative braking, high-demand acceleration).
- Cost-Effective Manufacturing: The design鈥檚 reduced component count and simplified circuitry lower production costs, making it suitable for large-scale EV deployment.
Applications
- Electric Vehicles (EVs): Enhances powertrain efficiency and battery lifespan for electric passenger and commercial vehicles.
- Hybrid Energy Storage Systems (HESS): Applicable in HESS configurations that require balanced, high-efficiency energy management.
- Renewable Energy Systems: Can be adapted for renewable systems needing multi-source energy storage management.
Opportunity
Licensing and collaboration opportunities are available for automotive manufacturers, energy storage solution providers, and renewable energy companies seeking to enhance the efficiency and lifespan of their products while reducing production costs.
IP Status
Provisional patent
Seeking
- Development partner
- Commercial partner
- Licensing
Posted/updated
November 14, 2024/March 19, 2025 (Benefits)