Off-Board Charger Switching Between AC and DC for PHEV Compatibility
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Solution Overview
Problem
Plug-in hybrid electric vehicles cannot be charged at most electric vehicle charging places configured with direct current charging devices, leading to increased reliance on engine power generation and higher carbon emissions.
Innovation Solution
An off-board charger with a power conversion circuit, a power supply port, a conversion adapter, and a controller, which allows for both alternating current and direct current charging by adjusting connections based on voltage signals from a connection confirmation port.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a direct current charging device is used, then battery electric vehicles can be charged efficiently, but plug-in hybrid electric vehicles cannot be charged
Solution Approach 1:
The charging device is designed to support both direct current charging mode and alternating current charging mode, making it compatible with both battery electric vehicles and plug-in hybrid electric vehicles. The controller automatically detects the vehicle type and switches between charging modes accordingly.
Solution Approach 2:
The charging device dynamically adjusts its operating mode based on the connected vehicle type. The controller detects whether a plug-in hybrid electric vehicle or battery electric vehicle is connected and automatically switches between alternating current charging mode and direct current charging mode to provide appropriate charging service.
2Adaptability or versatility
If an alternating current charging device is used, then plug-in hybrid electric vehicles can be charged, but charging efficiency is reduced
Solution Approach 1:
The charging device dynamically switches between alternating current charging mode and direct current charging mode based on the detected vehicle type. When a plug-in hybrid electric vehicle is detected, alternating current charging mode is used; when a battery electric vehicle is detected, direct current charging mode is used for high efficiency.
Solution Approach 2:
The charging device incorporates dual charging capabilities (alternating current and direct current) to serve different vehicle types appropriately, using alternating current mode for plug-in hybrid electric vehicles and direct current mode for battery electric vehicles to optimize charging efficiency for each type.
3Adaptability or versatility
If integrated charging pile design is used, then both charging modes are available, but device complexity increases
Solution Approach 1:
A single power supply port is designed to support both alternating current charging and direct current charging functions. The controller intelligently switches between charging modes based on the connected vehicle type, eliminating the need for separate charging piles and multiple charging guns.
Solution Approach 2:
The patent merges alternating current charging functionality and direct current charging functionality into a single charging device with one power supply port. The controller integrates the control logic for both charging modes, reducing the need for multiple charging guns and simplifying the overall system structure.
4Adaptability or versatility
If alternating current interface transformation is used, then direct current charging becomes possible, but manufacturing complexity increases
Solution Approach 1:
The controller acts as an intermediary that manages the power flow and signal transmission between the power supply port and the vehicle. It detects the vehicle type and automatically configures the appropriate charging mode without requiring any physical modification or reconstruction of the vehicle's electrical system.
Solution Approach 2:
The charging device is designed with universal compatibility to work with both alternating current charging interfaces and direct current charging interfaces. The controller automatically adapts to the connected vehicle type and provides appropriate charging service without requiring any transformation or reconstruction of the vehicle's electrical system.
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 charging of plug-in hybrid electric vehicles through a direct current charging interface, reducing carbon emissions and increasing charging flexibility without the need for additional charging guns or cable reductions.
Implementation Method 1
an off-board charger includes a power conversion circuit, a power supply port, a conversion adapter, and a controller
Data Source
AI summary
This application provides an off-board charger, a charging system, and a charging station. The off-board charger includes a power conversion circuit, a power supply port, a conversion adapter, and a controller. The conversion adapter includes a connection port and an alternating current output port. The controller controls, when the conversion adapter is connected to the power supply port, the power supply port to connect to an alternating current power grid, the power supply port to connect to the connection port, and the alternating current output port to connect to a charging port of a powered device; or controls, when the conversion adapter is disconnected from the power supply port, the power conversion circuit to connect to an alternating current power grid, and the power supply port to connect to the charging port of the powered device.