Dual-Input Switching Power Supply for Low-Power ESS Standby
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Solution Overview
Problem
The existing energy storage systems with uninterruptible power supplies (UPS) using lead-acid batteries have a short service life, requiring frequent maintenance and being costly, especially in harsh environments, and they cannot sustain long-term standby due to high power consumption.
Innovation Solution
A switching power supply system that connects to both AC and DC power sources, allowing the energy storage system to enter a low-power-consumption standby mode, where it only powers the master control unit, reducing overall power consumption and extending the system's standby time, and includes a rectifier module, DC/DC power supply units, and diode transmission modules to manage power distribution efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a UPS with lead-acid battery is used to ensure high reliability of power supply, then the power supply reliability is improved, but the service life is shortened to about two years requiring frequent maintenance
Solution Approach 1:
The patent replaces the expensive lead-acid battery in traditional UPS with a switching power supply that can operate in standby mode with extremely low power consumption. The switching power supply uses minimal energy (only enough to maintain control circuitry) during standby, allowing it to function indefinitely without battery replacement, thus eliminating the two-year maintenance cycle while maintaining power supply reliability.
Solution Approach 2:
The patent changes the operating parameters of the power supply system by implementing a switching power supply that can dynamically adjust its power consumption based on operational state. During standby mode, it reduces power consumption to minimal levels, whereas traditional UPS systems maintain high power consumption regardless of operational state, leading to rapid battery depletion.
2Reliability
If the energy storage system operates in standby mode with full power supply to all components, then the system readiness is maintained, but the power consumption is high reducing standby duration
Solution Approach 1:
The patent applies partial action by providing power only to essential components (control circuits) during standby mode rather than all system components. The switching power supply maintains minimal power consumption by selectively powering only the necessary control electronics while leaving non-essential loads inactive, thereby achieving system readiness with dramatically reduced power consumption.
Solution Approach 2:
The switching power supply employs periodic action through its switching mechanism, turning power on and off to essential components in controlled cycles. This allows the system to maintain readiness through intermittent monitoring and control while minimizing average power consumption during extended standby periods.
Data Source
AI summary
An energy storage system and a switching power supply thereof are provided in the present disclosure. An alternating current AC input terminal of the switching power supply is connected to an AC power source via a protection fuse unit. A direct current DC input terminal of the switching power supply is connected to an energy storage unit in the energy storage system via a protection fuse unit. An output terminal of the switching power supply is connected to a master control unit in the energy storage system and an additional load in the energy storage system. Therefore, the switching power supply can receive electric energy from at least one of the energy storage unit and the AC power source, and supply power to the master control unit and the additional load in the energy storage system.