V2X Charging Session Initialization Using Existing EV Hardware
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Solution Overview
Problem
Current standards do not address the initialization, communication, and setup of vehicle-to-load (V2X) charging sessions, where an electric vehicle transfers DC electrical power to a load device, resembling a DC fast charging station.
Innovation Solution
Implementing a V2X charging device with a DC-DC converter, DC bus charge module, and controller that execute computer-executable instructions to establish a V2X charging session, perform isolation checks, and pre-charge the device, utilizing existing vehicle hardware for communication and initialization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If V2X charging session initialization follows existing DC fast charging standards (DIN 70121), then communication and setup procedures are standardized, but the unique requirements of vehicle-as-source charging are not addressed
Solution Approach 1:
The patent inverts the traditional charging role by enabling the vehicle to act as the power source rather than the power sink. The vehicle's high-voltage battery and DC-DC converter are repurposed to supply power to external loads, reversing the conventional charging architecture where the grid supplies power to the vehicle.
Solution Approach 2:
The vehicle's existing charging hardware (DC-DC converter, high-voltage battery, communication modules) is made multi-functional by enabling it to both receive charge from the grid and supply charge to external loads. The same communication protocols and control systems manage both charging and discharging operations.
2Adaptability or versatility
If additional communication hardware is added to support V2X charging, then communication capabilities are enhanced, but device complexity and cost increase
Solution Approach 1:
The vehicle's existing communication infrastructure (OBD port, infotainment system, telematics modules) is made multi-functional to handle both traditional charging communication and V2X charging initialization. The same CAN bus and communication protocols are reused for both charging session management and vehicle control functions.
Solution Approach 2:
The vehicle's existing communication systems self-configure to handle V2X charging protocols without requiring dedicated separate communication hardware. The infotainment system and telematics modules automatically adapt their communication interfaces to manage the dual role of the vehicle as both charger and chargee.
3Reliability
If isolation checks and pre-charging procedures are implemented for V2X charging, then safety is improved, but charging session initialization time increases
Solution Approach 1:
Isolation checks and pre-charging procedures are performed automatically during the charging session initialization phase, before actual power transfer begins. The DC-DC converter and high-voltage battery system conduct self-tests and preliminary charging operations to ensure safety conditions are met before full V2X charging commences.
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 safe and efficient energy transfer from a donor vehicle to a load, mimicking a DC fast charging station, without additional communication hardware, ensuring compliance with DIN 70121 safety standards.
Implementation Method 1
a V2X device that includes a DC/DC power converter
Implementation Method 2
perform an isolation check of a V2X charging device from the donor vehicle
Data Source
AI summary
A processor, coupled with memory, can initiate a vehicle-to-load power transfer, detect an electric coupling between an electric vehicle and a load, and transfer electric power from the electric vehicle to the load.