Donor Vehicle Inverter Virtual Driving Mode Jump Start
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Solution Overview
Problem
Hybrid and electric vehicles with discharged high-voltage traction batteries cannot be directly jump-started or remotely charged due to voltage differences, resulting in unsafe and inefficient current transfer.
Innovation Solution
The method involves interrupting the current path from the inverter to the electric drive of the donor vehicle, connecting the inverter in a virtual driving mode to the recipient vehicle's electric drive for jump-starting, and using a bidirectional inverter to convert DC voltage to AC for charging the recipient's battery, allowing for controlled high-energy transfer via a low-resistance charging connection or radio link.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If batteries with different voltages are connected directly for jump starting, then energy transfer is simple, but dangerous currents occur due to voltage difference
Solution Approach 1:
The patent introduces a current path interruption mechanism (mediator) between the donor vehicle's inverter and electric drive. This mediator allows controlled connection and disconnection, enabling safe voltage matching and current limitation during jump starting operations between vehicles with different battery voltages.
Solution Approach 2:
The patent changes the operational parameters of the inverter by switching between different operation modes (driving mode, recuperation mode, virtual driving mode). This allows the inverter to adapt its output characteristics to match the recipient vehicle's battery voltage requirements, enabling safe energy transfer despite voltage differences between donor and recipient vehicles.
2Reliability
If DC to DC converter is used for voltage matching, then safe charging is achieved, but device complexity increases
Solution Approach 1:
The patent makes the inverter multi-functional by enabling it to operate in multiple modes (driving, recuperation, and virtual driving). This eliminates the need for a separate DC to DC converter, as the inverter itself performs voltage matching and power conversion functions, thereby reducing overall system complexity while maintaining safe charging operations.
Solution Approach 2:
The patent combines the functions of the inverter and what would traditionally require a separate DC to DC converter into a single integrated system. The inverter handles both motor control and battery charging functions through its multiple operation modes, simplifying the overall architecture.
3Productivity
If inverter is used in virtual driving mode for energy transfer, then charging efficiency improves, but control complexity increases
Solution Approach 1:
The patent implements control mechanisms that monitor the jump starting operation and adjust the inverter's virtual driving mode operation accordingly. This feedback control ensures efficient energy transfer while managing the complexity of operating the inverter in an unconventional mode, adapting to the recipient vehicle's battery state and requirements.
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
This approach enables efficient and safe high-energy transfer between vehicles, minimizing additional complexity and infrastructure, allowing hybrid and electric vehicles to be jump-started or remotely charged using existing components, reducing charging time and ensuring the vehicle can reach the next charging station.
Implementation Method 1
the inverter of the donor vehicle is operated in the virtual driving operation mode
Implementation Method 2
the inverter of the recipient vehicle is operated in the virtual recuperation operation mode for charging the discharged high voltage fraction battery
Data Source
AI summary
A method for performing a jump starting operation or a remote charging operation of a recipient vehicle. A current path from an inverter to an electric drive of the donor vehicle is disconnected. For the jump starting operation, the inverter of the donor vehicle is connected on the output side to the electric drive of the recipient vehicle and the inverter of the donor vehicle is operated in the virtual driving operation mode and the electric drive of the recipient vehicle is started. During the remote charging operation, the inverter of the donor vehicle is connected on the output side to the inverter of the recipient vehicle and is operated in the virtual driving operation mode, while the inverter of the recipient vehicle is operated in the virtual recuperation operation mode and charges the discharged battery of the recipient vehicle.