Vehicle DC-DC Converter Reuse for External Surplus Power Supply
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Solution Overview
Problem
Existing power supply systems for moving bodies with batteries and electric drive sources do not provide a specific circuit configuration for efficiently supplying surplus power to external power supply targets, lacking a detailed method for power transmission from the moving body to an external power supply target.
Innovation Solution
A power supply system incorporating a DC-DC converter circuit with an internal reactor and switching circuit in the internal power feeding path, along with a connection circuit and control device to manage power transmission from the moving body's battery to an external power supply target, forming a transformer with an external reactor to efficiently supply surplus power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dedicated power supply circuit is added to enable power transmission from moving body to external target, then power supply capability is improved, but device complexity increases
Solution Approach 1:
The patent applies multi-functionality by enabling the existing DC-DC converter circuit to serve dual purposes: its original function of power management within the moving body and a new function of power supply to external targets. The control device selectively configures the DC-DC converter to operate in different modes depending on whether power needs to be supplied internally or externally, eliminating the need for a dedicated power supply circuit and reducing overall system complexity.
Solution Approach 2:
The patent merges the power supply function with the existing internal power feeding path by connecting the power receiving terminal to the DC-DC converter circuit that already exists in the system. This integration allows surplus power to be transmitted externally through the same circuit infrastructure used for internal power distribution, thereby avoiding additional hardware and simplifying the overall device architecture.
2Device complexity
If existing internal circuitry is used for power supply, then device complexity is reduced, but power supply efficiency may be compromised
Solution Approach 1:
The patent applies dynamics by implementing a control device that dynamically adjusts the operating mode of the DC-DC converter based on real-time power conditions. The control device monitors surplus power availability and selectively activates power supply to external targets only when appropriate, optimizing energy utilization. The DC-DC converter dynamically adapts its conversion ratio and operating parameters to maximize efficiency whether supplying power internally or externally, preventing energy losses that would occur with static circuit configurations.
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
Enables efficient power supply to external targets using the existing internal circuitry, reducing component count and costs, and allowing for selective power distribution based on surplus energy availability.
Implementation Method 1
a DC-DC converter circuit provided in an internal power feeding path between the battery and the electric drive source
Implementation Method 2
a reactor attachment portion configured to hold an external reactor in a manner that the external reactor and the internal reactor form a transformer
Data Source
AI summary
A power supply system supplies power from a moving body including a battery and an electric drive source to an external power supply target. The power supply system includes a DC-DC converter circuit provided in an internal power feeding path between the battery and the electric drive source, a connection circuit capable of electrically connecting the DC-DC converter circuit to a power receiving terminal (power supply inlet) of the power supply target, and a control device for controlling the DC-DC converter circuit so as to supply surplus power of the battery to the power supply target via the DC-DC converter circuit and the connection circuit.