Modular Power Converter Layout for Multi-Voltage EV Charging
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Solution Overview
Problem
The complexity and cost of charging systems are increased due to the wide variation in voltage and capacity requirements across different vehicle types, leading to a complicated converter configuration.
Innovation Solution
A power conversion device with multiple isolated cell converters connected in series, featuring DC path connection and series connection means to accommodate varying voltage and capacity needs, along with a load connection mechanism to efficiently distribute power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the converter configuration is made complicated to accommodate wide variation in charging voltage and capacity, then the adaptability to different vehicle types is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The power conversion device is divided into multiple isolated cell converters (first isolated cell converter, second isolated cell converter, etc.), each capable of independent operation. These modular units can be selectively connected to different DC paths, allowing the system to adapt to various voltage and capacity requirements without requiring a completely different converter configuration for each vehicle type.
Solution Approach 2:
The DC path connection means enables a single converter configuration to serve multiple functions by selectively connecting different isolated cell converters to different DC paths. The same hardware infrastructure can accommodate various vehicle types with different charging requirements through flexible connection arrangements, eliminating the need for multiple specialized converter configurations.
2Adaptability or versatility
If multiple isolated cell converters are used to accommodate different power values, then the adaptability to different vehicle types is improved, but the installation space increases
Solution Approach 1:
Multiple isolated cell converters are merged into a single integrated power conversion device with shared control systems, cooling infrastructure, and housing. The DC path connection means and series connection means are integrated within the same device structure, allowing multiple converter functions to coexist in a compact arrangement that reduces overall installation space compared to separate standalone converters.
Data Source
AI summary
The objective of the present invention is to reduce the manufacturing costs of an electric power converting device and to reduce the installation space thereof. An electric power converting device comprises: AC/DC converters and AC/DC converters connected in series to an alternating-current power supply; direct-current buses provided on an output side; change-over switches, change-over switches, change-over switches, and change-over switches for selectively connecting the AC/DC converters and the AC/DC converters to each direct-current path; a bus-to-bus connecting switch connecting the direct-current buses in series; and a switch for connecting an electric circuit connected in series by means of the bus-to-bus connecting switch to a load.