Charging system and method of using same
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Solution Overview
Problem
The increasing demand for electric vehicle charging and energy storage solutions poses challenges for utility providers, as expanding infrastructure is costly and inefficient, while existing energy management systems fail to effectively utilize stored energy in vehicle battery packs.
Innovation Solution
A charging system with a control system that manages a motor with multiple windings and rotor windings, allowing for flexible operation modes to adapt to different power sources and voltage conditions, including DC and AC, by bypassing the motor, using it as a boost inductor, or injecting excitation to adjust voltage levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the capacity of electric utility providers is increased to serve future needs of increased electric vehicle adoption, then the energy supply capability is improved, but the cost and economic feasibility deteriorate
Solution Approach 1:
The patent enables battery systems to serve dual purposes: powering vehicles and providing energy back to the grid. Vehicle batteries act as distributed energy storage resources that can discharge to the grid during peak demand, eliminating the need for utility providers to expand capacity. This self-service approach transforms passive energy consumers into active energy providers, resolving the contradiction between improving energy supply capability and avoiding costly infrastructure expansion
Solution Approach 2:
The patent creates a charging system that performs multiple functions: charging batteries from the grid, discharging batteries to the grid, and providing voltage regulation services. The bidirectional charging infrastructure serves both as a vehicle charging station and as a distributed energy resource management system, allowing the same infrastructure to adapt to varying grid conditions and energy demands without requiring separate systems
2Device complexity
If existing energy management systems are used to manage vehicle battery energy, then the system simplicity is maintained, but the energy utilization efficiency deteriorates
Solution Approach 1:
The patent implements dynamic energy management that continuously monitors and adapts to real-time conditions. The system dynamically determines optimal charging and discharging strategies based on battery state of charge, grid conditions, and energy prices. This dynamic approach maximizes energy utilization efficiency by capturing value from bidirectional energy flow while maintaining manageable system complexity through automated control algorithms
3Measurement precision
If voltage regulation is achieved using traditional methods with external transformers, then the voltage control precision is improved, but the device complexity and space requirements deteriorate
Solution Approach 1:
The patent changes the fundamental parameter of voltage regulation from passive transformation to active control through power electronics. Instead of using transformers with fixed turns ratios, the system uses bidirectional DC-DC converters and inverters that can dynamically adjust voltage levels through electronic control. This approach achieves precise voltage regulation while eliminating the need for bulky external transformers, reducing both device complexity and space requirements
Solution Approach 2:
The patent introduces power electronic converters as intermediary devices between the battery and grid. These converters act as intelligent mediators that manage voltage transformation, power factor correction, and energy flow control without requiring traditional electromagnetic transformers. The intermediary power electronics provide precise voltage control while maintaining system flexibility and reducing physical footprint
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient charging and discharging of battery systems without requiring external transformers, supporting both AC and DC grids, and optimizing energy use by integrating vehicle batteries with the power grid.
Implementation Method 1
the control system applies an excitation voltage on the at least one rotor winding when the power source voltage is outside the voltage operating range of the battery system
Data Source
AI summary
A charging system and a method of operating the same are provided. The charging system includes an electric machine which may be a wound or un-wound rotor type or a doubly fed induction motor (DFIM). A control system is coupled to the electric machine and a battery system. In the case of a wound rotor, the control system is coupled to stator windings and a rotor winding for controlling excitation of the stator windings and the rotor winding. The charging system is AC and DC compatible. In the case of an AC power source, the control system injects excitation into a rotor winding to induce a desired voltage in the stator, if the power supply voltage of the power supply is greater or smaller than the voltage of the battery system. Other modes of operation allowing for safe charging and discharging of a battery system are also described herein.