Battery Switching Circuit Layout for Low-Radiation Power Supply
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Solution Overview
Problem
Existing power supply devices with large closed loops surrounding power lines experience significant radiation, which can affect surrounding electronic devices and cause malfunctions.
Innovation Solution
A power supply device design that includes a first power line for exchanging electric power externally and a second power line with current flowing in the opposite direction, along with switching units that control the connection state of secondary batteries to reduce the closed loop area by disposing the power lines side by side between switching units, and using shielded wires and return paths to further minimize radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the power lines are arranged in a conventional manner with large closed loop area, then the device structure is simple, but the radiation effect on surroundings becomes large
Solution Approach 1:
The patent applies dimensionality change by arranging the first and second power lines side by side in a parallel configuration between adjacent switching units, rather than allowing them to form a large planar loop. This spatial reorganization reduces the enclosed area of the closed loop formed by the power lines, thereby minimizing radiation effects while maintaining structural simplicity
Solution Approach 2:
The patent converts the potentially harmful large-area closed loop structure into a beneficial small-area configuration by positioning the power lines adjacent to each other. This transformation reduces the loop area and radiation emission, turning what would be a harmful radiation source into a controlled, minimal-emission design
2Object-generated harmful factors
If the first and second power lines are disposed side by side between switching units, then the radiation is reduced, but the device complexity increases
Solution Approach 1:
The patent segments the power line arrangement into distinct first and second power lines that are separately routed and positioned side by side between switching units. This segmentation allows for precise control of each line's position, enabling the reduction of closed loop area while maintaining a systematic and manageable structural complexity
Data Source
AI summary
A power supply device includes: a first high-voltage line for exchanging the electric power externally; a second high-voltage line for applying current flowing in a direction opposite to the first high-voltage line; a plurality of batteries; a plurality of SUs, the SUs being provided corresponding to the respective batteries, switching a connection state of the batteries to the first high-voltage line, and being disposed in a circle; and an SCU that controls the SUs. The SU can switch between a first state in which the battery corresponding to the SU is connected in series to the first high-voltage line and a second state in which the battery is not connected to the first high-voltage line. The SCU controls the SUs to switch to the first state or the second state in accordance with a voltage of the electric power to be charged and discharged.