Mobile EV Charging System Fuel Cell Power Distribution
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Solution Overview
Problem
Conventional electric vehicle charging systems using fuel cell vehicles suffer from efficiency losses due to unnecessary charging and discharging of high-voltage batteries, which reduces the overall efficiency of electric power distribution.
Innovation Solution
A mobile electric vehicle charging system that utilizes a fuel cell to generate power, a bidirectional power converter, and a high-voltage junction box to distribute power to a mobile charger, allowing for efficient charging of another vehicle without relying on the main battery, thereby avoiding inefficiencies in battery state of charge management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional electric power distribution control is used with external power supply circuit connected to high-voltage battery, then external electric power can be supplied, but battery charging and discharging are repeatedly performed causing efficiency decrease
Solution Approach 1:
The patent segments the power supply function by introducing a separate external power supply circuit that connects directly to the inverter, independent from the high-voltage battery. This allows external power to be supplied without requiring battery charging/discharging cycles, thus eliminating energy efficiency losses while maintaining the ability to provide external power.
Solution Approach 2:
The patent introduces an inverter as an intermediary component that can receive power from both the fuel cell and external power supply, and convert it to the required output. This intermediary allows flexible power routing where external power can directly supply the inverter without passing through the battery, avoiding unnecessary charging/discharging cycles.
2Power
If separate external power supply circuit is added to fuel cell vehicle, then external electric power can be supplied, but system complexity increases
Solution Approach 1:
The inverter is designed with multi-functionality, serving both as the power conversion device for the fuel cell and as the interface for external power supply. By making the inverter universal, the patent adds external power supply capability without requiring entirely separate dedicated circuits, thus limiting the increase in system complexity.
Solution Approach 2:
The patent merges the external power supply function with the existing inverter and power distribution system. Instead of creating completely separate independent circuits for external power supply, the external power supply circuit is integrated into the existing power management architecture, combining multiple functions into shared components to reduce overall system complexity.
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 solution enhances system stability, simplifies the system, reduces costs, and prevents power waste by using the fuel cell as the primary power source for charging, while maintaining the main battery's durability and state of charge.
Implementation Method 1
a fuel cell system using a fuel cell that generates electricity through electrochemical reaction between a fuel gas and an oxidizing gas as an energy source
Data Source
AI summary
A mobile electric vehicle charging system may include a fuel cell configured to generate electric power required to drive a vehicle, a main battery configured to store electric power generated by the fuel cell, a bidirectional power converter configured to control electric power input to and output from the main battery, a mobile charger configured to supply electric power to charge another vehicle, and a high-voltage junction box for divergence, configured to distribute electric power generated by the fuel cell to the bidirectional power converter and the mobile charger.