Multi-Drive EV Charging Circuit for Cross-Voltage V2V Power
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Solution Overview
Problem
Existing vehicle-to-vehicle (V2V) charging systems face limitations due to differences in battery voltage between vehicles, restricting charging options when immediate charging is not available.
Innovation Solution
A dual-drive system with a switching assembly and controller that utilizes existing components like inverters to create boost and buck converter circuits, allowing for voltage regulation and enabling charging across a wide range of voltages, including legacy and DC fast charging, by connecting electric motors and inverters in various configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a vehicle-to-vehicle charging system is implemented without voltage regulation, then charging can be provided between vehicles, but the charging is limited when battery voltages are different
Solution Approach 1:
The patent makes the existing drive system components (inverters, motors, converters) perform multiple functions by reconfiguring their connections through a switching assembly. The same hardware that propels the vehicle is reused for voltage regulation and charging, allowing the system to adapt to different voltage requirements without adding dedicated charging equipment.
Solution Approach 2:
The patent employs a dynamic switching assembly that can reconfigure the electrical connections between drive system components in real-time. This allows the system to dynamically adjust the circuit configuration (series/parallel connections of inverters and motors) to match the voltage requirements of the energy storage system being charged, enabling versatile voltage adaptation.
2Adaptability or versatility
If dedicated voltage conversion equipment is added to enable charging across different voltages, then charging compatibility improves, but system complexity and cost increase
Solution Approach 1:
The patent makes the existing drive system components (inverters, motors, converters) perform multiple functions by reconfiguring their connections through a switching assembly. The same hardware that propels the vehicle is reused for voltage regulation and charging, allowing the system to adapt to different voltage requirements without adding dedicated charging equipment.
Solution Approach 2:
The patent merges the charging function with the existing drive system by integrating the switching assembly that reconfigures connections between drive components. This consolidation eliminates the need for separate voltage conversion equipment, reducing overall system complexity while maintaining voltage adaptability.
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 effective V2V charging by regulating output voltage to match the requirements of the energy storage system, supporting a wide range of charging schemes without the need for additional converters, thus providing a cost-effective solution for vehicles with dissimilar voltage characteristics.
Implementation Method 1
control the conversion circuit to regulate an output voltage and supply power to an energy storage system
Data Source
AI summary
A charging system of a vehicle includes a first conversion device of a first drive system of the vehicle, the first conversion device connected to a first electric motor. The system also includes a second conversion device of a second drive system of the vehicle, the second conversion device connected to a second electric motor. The first drive system and the second drive system are connected to a battery system of the vehicle. The system also includes a switching assembly including a plurality of switches configured to selectively connect the first electric motor and/or the second electric motor to a charge port of the vehicle, and a controller configured to control the switching assembly to define a conversion circuit that includes components of the first drive system and/or the second drive system, and control the conversion circuit to regulate an output voltage and supply power to an energy storage system.