Vehicle Charging Arrangement with Galvanic Isolation and Direct Connector
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Solution Overview
Problem
Existing vehicle charging systems lack versatility and safety, particularly in allowing both galvanically isolated and non-isolated charging, and do not efficiently adapt to varying voltage sources and frequencies, leading to limitations in charging speed and security.
Innovation Solution
The system incorporates at least two energy absorption means: a connector part for direct electrical connection and a secondary winding for inductive coupling, enabling galvanically isolated charging with high power capability, adaptability to different voltage sources, and safety features like automatic diversion of charging current in case of faults, along with mechanical arrangements for improved coupling and rectifier configurations for combining currents from various sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If galvanic isolation is implemented for safety, then safety is improved, but charging power capability deteriorates
Solution Approach 1:
The charging system is segmented into two independent pathways: a galvanically isolated inductive charging pathway for safety-critical operations, and a direct connector pathway for high-power charging. This segmentation allows each pathway to be optimized for its specific function without compromising the other.
Solution Approach 2:
The vehicle charging system is designed with multi-functionality to support both galvanically isolated inductive charging and direct high-power connector charging through the same energy storage device. The system can adaptively select or combine charging modes based on safety requirements and power needs.
2Productivity
If direct electrical connection is used for high power charging, then charging speed is improved, but safety deteriorates
Solution Approach 1:
The charging system dynamically adapts its configuration based on operational requirements. The vehicle can switch between direct connection mode for high-speed charging and inductive coupling mode for enhanced safety, allowing real-time optimization of the safety-speed tradeoff.
3Device complexity
If single charging method is implemented, then device complexity is reduced, but adaptability deteriorates
Solution Approach 1:
The charging system incorporates multiple charging methods (inductive coupling and direct connector charging) within a unified architecture. This universal design enables the vehicle to adapt to different charging infrastructures and operational scenarios while maintaining a cohesive system structure.
4Reliability
If galvanic isolation is implemented, then protection against voltage mismatches is improved, but charging power capability deteriorates
Solution Approach 1:
The system segments voltage adaptation functions into the inductive charging pathway with its inherent galvanic isolation and voltage matching capabilities, while the direct connector pathway handles high-power charging with appropriate voltage management. This segmentation allows each pathway to address specific voltage-related challenges optimally.
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 allows for flexible charging options, including high-power three-phase and single-phase charging, safe operation in wet environments, tamper-proofing, and the ability to charge while driving, while ensuring safety through galvanic isolation and fault protection, thereby enhancing charging efficiency and security.
Implementation Method 1
a secondary winding (U1, U2) which can be inductively coupled to a primary conductor (L1, L2, L3)
Data Source
Figure 1
AI summary
The invention relates to a charging arrangement for a vehicle, and a vehicle, the energy store of which can be electrically charged. At least two energy absorbing means are provided on the vehicle to charge the energy store. A first energy absorbing means is designed as a plug-in connector part to which a mating plug-in connector part can be electrically connected, while at least one second energy absorbing means allows the energy store to be charged using galvanic isolation.