High-Voltage Charge Booster for Universal EV Charging
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Solution Overview
Problem
Existing electric vehicle charging systems are dependent on specific voltage infrastructures and require additional converters for compatibility, limiting global charging flexibility and efficiency.
Innovation Solution
A high-voltage charge booster that automatically switches between 400 V and 800 V using a non-electrically isolated, bidirectional converter with software-controlled internal voltage and current regulation, enabling efficient charging across various voltage ranges and infrastructures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a direct current charging pillar with 800 V infrastructure is used, then charging speed is improved, but device complexity and infrastructure dependency increase
Solution Approach 1:
The charge booster is designed to accept input voltages in the range of 200-700 V and automatically adapt to different voltage levels (400 V or 800 V infrastructure), making it universally compatible with existing and future charging infrastructures without requiring separate systems for different voltage standards
Solution Approach 2:
The system dynamically adjusts its operating parameters based on the detected infrastructure voltage level, switching between 400 V and 800 V modes to optimize charging speed while maintaining compatibility with different infrastructure configurations
2Adaptability or versatility
If a voltage converter is integrated into the charging pillar, then charging compatibility is improved, but device complexity and cost increase
Solution Approach 1:
The charge booster acts as an intermediary device between the charging pillar and the traction battery, handling all voltage conversion and adaptation functions in a single dedicated unit rather than requiring integrated converters in both the pillar and vehicle systems
Solution Approach 2:
The bidirectional converter in the charge booster provides universal compatibility with both 400 V and 800 V infrastructures, eliminating the need for separate converter designs for different voltage standards and reducing overall system complexity
3Adaptability or versatility
If automatic switching between 400 V and 800 V is implemented, then adaptability is improved, but control complexity increases
Solution Approach 1:
The control unit continuously monitors the input voltage level from the charging pillar and automatically adjusts the converter operation accordingly, switching between 400 V and 800 V modes based on real-time feedback without requiring complex manual configuration or multiple separate control systems
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
The solution provides universal charging compatibility, reduces charging time, and maximizes the use of existing 400 V infrastructure, offering a power advantage and compact design for vehicle retrofitting, while maintaining independence from voltage increases.
Implementation Method 1
a non-electrically isolated, bidirectional converter with selectable direction of power flow and a voltage range of the feeding direct current infrastructure between 200 and 700 V
Data Source
AI summary
A high-voltage charge booster is provided for charging a direct current traction battery at a direct current charging pillar. The high-voltage charge booster has a converter (14) for transforming the first voltage level into the second voltage level if the first voltage level differs from the second voltage level. A bypass (16) bypasses the converter (14) or connects through a power stage if the first voltage level corresponds to the second voltage level.