V2X Charging Session Initialization With Isolation Check and Pre-Charge
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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, mimicking 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 converter, utilizing existing vehicle hardware for communication and initialization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If V2X charging session initialization follows existing DC fast charging standards, then communication protocol compatibility is improved, but the inability to address vehicle-as-source scenarios creates a standardization gap
Solution Approach 1:
The patent inverts the traditional charging role by enabling the vehicle to act as a power source rather than a recipient. The V2X charging device allows a donor vehicle to provide DC electrical power to a recipient load, reversing the conventional charging direction while maintaining protocol compatibility through adaptive communication protocols that recognize and handle the inverted role scenario
2Reliability
If V2X charging device performs isolation check and pre-charge operations, then safety compliance is improved, but additional control steps increase system complexity
Solution Approach 1:
The patent applies preliminary action by performing isolation checks and pre-charge operations before the actual power transfer begins. The controller executes these safety verification steps in advance to ensure proper isolation and voltage levels are established, preventing potential hazards before they can occur during the charging session
Solution Approach 2:
The V2X charging device performs self-verification through automated isolation checks and pre-charge operations managed by the controller. The system autonomously monitors its own safety parameters and adjusts operational states without requiring external intervention, reducing the need for additional manual control steps while maintaining high safety compliance
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 recipient load, mimicking a DC fast charging station, without additional communication hardware, ensuring compliance with safety standards like DIN 70121.
Implementation Method 1
a high voltage direct current (DC)-DC converter
Implementation Method 2
perform an isolation check of a V2X charging device from the donor vehicle
Implementation Method 3
pre-charge the V2X charging device
Data Source
AI summary
Various disclosed embodiments include illustrative non-transitory computer-readable media for controllers for vehicle-to-load (V2X) charging devices, controllers for V2X charging devices, and V2X charging devices. In an illustrative embodiment, non-transitory computer-readable media store therein computer-executable instructions that, when executed on a processor, are configured to cause the processor to: establish that a protocol to be followed in a charging session is a V2X charging session from a donor vehicle; initialize the V2X charging session from the donor vehicle; perform an isolation check of a V2X charging device from the donor vehicle; and pre-charge the V2X charging device.