Charging Station Power-Supply Circuit Standby Energy Management
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Solution Overview
Problem
Charging stations consume excessive energy in standby mode, leading to increased reactive power and reduced grid power supply capacity due to continuous power supply to auxiliary devices.
Innovation Solution
A power-supply circuit with a control module and an on-off module that disconnects power to target devices such as the charging module, auxiliary power supplies, and DC electricity meters when the station is in standby mode, using relays and air switches to manage the disconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the charging station continuously supplies power to auxiliary devices in standby mode, then the devices remain operational and ready for use, but the energy consumption increases and reduces grid power supply capacity
Solution Approach 1:
The power supply system dynamically adjusts its state based on operational needs. During charging operations, all auxiliary devices receive continuous power. In standby mode, the system automatically disconnects power to non-essential auxiliary devices while maintaining power to critical components, achieving dynamic energy management that balances readiness with conservation
Solution Approach 2:
The power supply circuit is segmented into multiple independent branches, each controlled by its own switching device. This segmentation allows selective disconnection of specific auxiliary devices (such as display screens, fans, and non-critical monitoring equipment) while maintaining power to essential components, enabling granular energy management during standby operations
2Speed
If the charging station supplies power to all controlled devices in standby mode, then the devices can respond immediately to charging requests, but the reactive power increases and reduces grid capacity
Solution Approach 1:
Critical auxiliary devices that must respond immediately to charging requests are identified and maintained in a pre-powered state through selective continuous power supply. Non-critical devices are allowed to power down during standby, reducing reactive power consumption while ensuring that essential components remain ready for immediate operation when a charging request is received
3Use of energy by moving object
If the charging station powers off auxiliary devices in standby mode, then energy consumption is reduced, but the devices may not be ready for immediate operation
Solution Approach 1:
Different auxiliary devices are assigned different power management qualities based on their operational criticality. Essential devices (such as control circuits, safety monitoring systems, and communication modules) maintain continuous power supply for immediate responsiveness, while non-essential devices (such as display screens, audio systems, and auxiliary fans) are powered down during standby. This localized differentiation of power quality optimizes the balance between energy savings and operational readiness
Data Source
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AI summary
A power-supply circuit for a charging station. The circuit includes a control module (11), an on-off module (12), and a first auxiliary power supply (13). A control terminal of the on-off module is connected to the control module; an input terminal of the on-off module is connected to the grid; an output terminal of the on-off module is connected to a target controlled device (14). The disclosed power-supply circuit herein can realize that, when the charging station is in the standby state, the control module controls the on-off module to be disconnected, so as to realize that the target controlled device, such as at least one of the charging module, the second auxiliary power supply, the DC electricity meter, and the fan, is no longer powered on. It saves the energy consumption of the target controlled device during the charging station in the standby state, and improves power supply capacity of the grid.