Bidirectional Charger Layout for Flexible Vehicle AC Power Ports
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Solution Overview
Problem
Existing vehicle power supply systems face challenges in standardizing bidirectional chargers across vehicles with different types and specifications, particularly when the number of AC power ports or rated voltage needs to be changed.
Innovation Solution
A vehicle power supply system is designed with a bidirectional charger, a distribution board, and a controller, allowing for the standardization of the bidirectional charger by separating the power distribution circuit and leakage current detector from the bidirectional charger, thus enabling flexibility in configuring AC power ports and rated voltage without altering the bidirectional charger configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of AC power ports or the rated voltage is increased to meet different vehicle specifications, then the adaptability of the power supply system is improved, but the configuration of the bidirectional charger must be changed, increasing device complexity
Solution Approach 1:
The power supply system is divided into functionally independent modules: the bidirectional charger handles AC-DC conversion, while the distribution board handles AC power distribution. This segmentation allows each module to be optimized independently, so changes in AC power port configuration do not affect the bidirectional charger design.
Solution Approach 2:
The AC power distribution circuit and leakage current detector are extracted from the bidirectional charger and placed in a separate distribution board. This extraction eliminates the need to modify the bidirectional charger when AC power port requirements change, resolving the contradiction between adaptability and device complexity.
2Adaptability or versatility
If the bidirectional charger configuration is changed to accommodate different AC power port requirements, then the adaptability is improved, but the standardization of the bidirectional charger across vehicles is lost
Solution Approach 1:
The bidirectional charger is designed as a universal module that performs AC-DC conversion regardless of the specific AC power port configuration. By making the bidirectional charger universal and handling AC distribution separately through the distribution board, the system achieves both standardization of the charger and flexibility in AC power port configuration across different vehicle models.
3Reliability
If larger components are used in the leakage current detector to handle higher power requirements, then the reliability is improved, but the size of the vehicle power supply system increases
Solution Approach 1:
The leakage current detector is extracted from the bidirectional charger and placed in the distribution board, which is optimized for AC power distribution. This allows the leakage current detector to be sized appropriately for AC current levels rather than being oversized to handle DC battery power, reducing the overall system size while maintaining detection reliability.
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 configuration allows for the standardization of the bidirectional charger across vehicles with different specifications, eliminating the need to change the bidirectional charger configuration with changes in AC power ports or rated voltage, and reduces the size of the vehicle power supply system by avoiding the need for larger components in the leakage current detector.
Implementation Method 1
The bidirectional charger is configured to convert an AC power input from an external power source via the charging port and the external power supply line into a DC power to supply the DC power to a vehicle battery
Implementation Method 2
convert the DC power input from the vehicle battery via the vehicle battery line into the AC power to supply the AC power to the external power supply line
Data Source
AI summary
A vehicle power supply system includes: a charging port; a bidirectional charger; an AC power port; a distribution board; and a controller for controlling an operation of the bidirectional charger. The bidirectional charger is configured to convert an AC power input from an external power source via the charging port and an external power supply line into a DC power to supply the DC power to a vehicle battery via a vehicle battery line, or convert the DC power input from the vehicle battery via the vehicle battery line into the AC power to supply the AC power to the external power supply line. The distribution board includes: a power distribution circuit configured to distribute the AC power input from the external power supply line to the AC power port; and a leakage current detector.