Dual Power Supply Circuit With Controlled Current Backflow
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Solution Overview
Problem
Existing power supply systems face challenges in ensuring continuous and sufficient power supply to load devices when the connection between power generation devices and power storage devices is interrupted or when power storage devices fail to supply power.
Innovation Solution
The proposed power supply system includes a first power supply circuit connected to a first load device, a second power supply circuit connected to a second load device, and a control device that controls backflow allowing elements to redirect current flow in case of interruptions or failures, ensuring power is supplied from alternative sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a backflow preventing element is used to prevent current backflow in the second power supply circuit, then the reliability of the second power supply circuit is improved, but the adaptability of the power supply system is worsened because the system cannot switch to alternative power paths when failures occur
Solution Approach 1:
The backflow allowing element dynamically changes the circuit configuration from a backflow-preventing state to a backflow-allowing state based on system conditions. The control device activates the backflow allowing element when detecting failures, enabling the system to adapt between different operational modes and maintain power supply continuity.
Solution Approach 2:
The backflow allowing element acts as an intermediary component between the backflow preventing element and the power supply circuits. It mediates the conflict between preventing and allowing backflow by being activated only when necessary, enabling the system to access alternative power paths through the second power supply circuit when the first power storage device fails.
2Productivity
If the control device activates the backflow allowing element to allow current backflow, then the productivity of the power supply system is improved by ensuring continuous power supply, but the device complexity increases due to additional control mechanisms
Solution Approach 1:
The control device implements a feedback mechanism by monitoring the operational status of the first power storage device and automatically activating the backflow allowing element when failures are detected. This closed-loop control ensures continuous power supply to load devices by switching to alternative power paths without requiring manual intervention, thereby maintaining high productivity.
Solution Approach 2:
The power supply system performs self-service by automatically detecting failures in the first power storage device and activating the backflow allowing element through the control device. The system manages its own power supply continuity without external assistance, ensuring uninterrupted operation of load devices while minimizing the need for complex external control mechanisms.
3Loss of time
If the system allows current backflow through the second power supply circuit, then the loss of time is reduced by ensuring continuous power supply, but the loss of energy increases due to current flowing through additional circuit paths
Solution Approach 1:
The backflow allowing element is pre-configured in the second power supply circuit but remains inactive during normal operation. When failures in the first power storage device are detected, the control device activates this pre-positioned element, enabling immediate switching to alternative power paths through the second power supply circuit. This preliminary arrangement minimizes the time loss associated with failure response while managing energy losses through controlled activation.
Data Source
AI summary
A power supply system includes: a first power supply circuit for supplying DC power from a first power generation device to a first load device; a first power storage device connected to the first power supply circuit; a second power supply circuit for supplying the DC power from the first power generation device to a second load device; and a second power storage device connected to the second power supply circuit. In a case where supply of DC power from the first power storage device to the first load device is cut off, DC power is supplied to the first load device from the second power storage device by allowing the current backflow in the second power supply circuit.