Low-Voltage Inductive Charging for Conventional Vehicles
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Solution Overview
Problem
Current inductive charging systems are primarily designed for battery electric vehicles (BEVs) and plug-in hybrid electric vehicles (PHEVs), making them impractical and costly for conventional internal combustion engine vehicles without electrified drive trains, as they require complex modifications for energy supply to low-voltage systems.
Innovation Solution
A vehicle-external induction unit with a primary coil and a secondary coil in the vehicle's low-voltage electrical distribution system allows for direct induction of AC voltage, which can be rectified or transformed for various components, enabling efficient energy supply to conventional vehicles without the need for high-voltage conversion or complex installations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If inductive charging systems are designed for BEVs and PHEVs with high-voltage systems, then charging capability is improved, but device complexity and cost increase for conventional vehicles
Solution Approach 1:
The patent changes the voltage parameter from high-voltage (400V/800V) to low-voltage (12V/24V) to make inductive charging suitable for conventional vehicles without electrified drive trains. This parameter change allows the use of existing low-voltage components and eliminates the need for complex high-voltage conversion systems.
Solution Approach 2:
The patent adapts the inductive charging concept from high-voltage BEV/PHEV systems to low-voltage conventional vehicle systems. By copying the basic electromagnetic induction principle and adapting it to low-voltage parameters, the system achieves charging capability for conventional vehicles without requiring high-voltage infrastructure.
2Adaptability or versatility
If high-voltage conversion and matching systems are installed in conventional vehicles, then charging compatibility is improved, but weight and installation complexity increase
Solution Approach 1:
The patent changes the voltage parameter from high-voltage to low-voltage to eliminate the need for heavy voltage conversion equipment. By operating directly at low-voltage (12V/24V), the system avoids installing transformers, rectifiers, and control electronics that would be required for high-voltage systems, thereby reducing weight.
Solution Approach 2:
The patent enables conventional vehicles to serve themselves with inductive charging using their existing low-voltage electrical systems. The vehicle's own low-voltage battery and electrical components can directly receive and utilize the inductively transferred energy without requiring external high-voltage conversion systems.
3Productivity
If inductive charging infrastructure is deployed for high-voltage vehicles, then charging efficiency is improved, but accessibility to conventional vehicles is reduced
Solution Approach 1:
The patent changes the operating voltage parameter to low-voltage (12V/24V) to broaden vehicle compatibility. This parameter change allows the same inductive charging infrastructure to serve both conventional vehicles and electrified vehicles, significantly increasing the versatility and accessibility of the charging network.
Solution Approach 2:
The patent creates a universal inductive charging system that can serve multiple vehicle types (conventional ICE vehicles, BEVs, PHEVs) with a single infrastructure. The low-voltage design enables the system to function across different vehicle platforms, making the charging infrastructure universally accessible.
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 cable-free energy supply to conventional vehicles, reducing installation complexity, costs, and weight, while enabling efficient charging and power distribution to low-voltage systems, extending the use of existing charging infrastructure to a broader range of vehicles.
Implementation Method 1
an AC electric voltage can be induced in at least part of the low-voltage vehicle electrical distribution system by electromagnetic coupling of the secondary coil to the primary coil
Implementation Method 2
a tuning capacitor is connected in parallel with the secondary coil, with it being possible for the induced AC voltage to be tapped off at said tuning capacitor. The tuning capacitor takes on the function of a resonant capacitor
Data Source
AI summary
A system includes a vehicle and an induction unit external to the vehicle. The induction unit includes a primary coil designed as a primary induction coil, and the vehicle includes a low voltage on-board electrical system having a secondary coil designed as a secondary induction coil. An alternating voltage can be induced in at least one part of the low-voltage on-board electrical system by the electromagnetic coupling of the secondary coil to the primary coil, and at least one component of the low-voltage on-board electrical system can be fed with the induced alternating voltage or with direct voltage via a rectifier.