Vehicle Charging Unit Shared Rectifier for Inductive and Conductive Modes
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Solution Overview
Problem
Current inductive charging systems for vehicles require additional components in the infrastructure for power factor correction and smoothing, increasing complexity and costs, especially when operating in single-phase or multiphase modes.
Innovation Solution
A charging unit with a common rectifier and smoothing circuit for both AC and DC voltages is integrated into the vehicle, allowing for the use of induced AC voltage from the receiver coil without additional infrastructure components, and a switching apparatus to selectively connect the input to the receiver coil or connection point for charging, reducing the need for separate components in the infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If inductive charging systems use separate rectifiers and PFC components for both inductive and conductive charging, then charging functionality is provided, but device complexity and costs increase
Solution Approach 1:
The patent combines the rectifier and PFC components into a shared infrastructure that serves both inductive and conductive charging systems. The rectifier unit and PFC elements are configured to process power for both charging methods, eliminating the need for separate components and reducing overall system complexity while maintaining full charging functionality.
Solution Approach 2:
The charging system is designed with universal power processing components that can handle both inductive and conductive charging modes. The rectifier and PFC infrastructure is configured to accommodate multiple charging methodologies, allowing a single set of components to perform multiple functions rather than requiring dedicated components for each charging type.
2Device complexity
If inductive charging systems are supplied in single-phase or multiphase mode without additional PFC and smoothing components, then component count is reduced, but voltage pulsing occurs
Solution Approach 1:
The patent integrates PFC and smoothing functionality into the shared rectifier infrastructure that is already required for conductive charging. By merging these functions into existing components rather than adding separate dedicated components, the system achieves voltage stabilization without significantly increasing component count.
Solution Approach 2:
The rectifier and PFC components serve dual purposes: they perform their primary function of rectifying and correcting power for both charging modes while simultaneously providing voltage smoothing to eliminate pulsing. The system uses its existing components to self-correct the voltage instability issue without requiring additional specialized smoothing components.
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 simplifies the charging system by eliminating the need for infrastructure-side rectification and smoothing, reducing component count and complexity, while enabling efficient charging using the same rectifier for both inductive and wired charging methods.
Implementation Method 1
In the receiver coil a voltage for charging the battery system is configured to be induced
Data Source
AI summary
A device for charging a battery system of a vehicle is provided. The battery system is configured to be charged by a charging unit, the charging unit is arranged in the vehicle, and the charging unit has an input and an output. The output is configured to be connected in an electrically conductive manner to the battery system in order to charge the battery system, a connection point for a releasable electrically conductive connection for transmitting an AC voltage for charging the battery system is arranged in the vehicle, and a receiver coil is arranged in the vehicle. In the receiver coil a voltage for charging the battery system is configured to be induced, and the input of the charging unit is configured to be connected in an electrically conductive manner to the connection point and/or to the receiver coil in order to charge the battery system.