DC-DC Battery Replenishment for Over-Discharge Protection
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Solution Overview
Problem
Energy storage systems face the risk of battery failure due to over-discharge, particularly when the power conversion system is abnormal and not timely maintained, leading to self-discharge and potential system failure.
Innovation Solution
A conversion power supply system with a controller, energy storage element, DC-DC converters, and a power supply module that autonomously replenishes electric energy to battery clusters when their voltage falls below a preset threshold, using external power sources and bidirectional DC-DC converters to balance energy and prevent over-discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the power conversion system is not timely maintained and becomes abnormal, then the system can operate without maintenance for a longer period, but the battery will self-discharge and risk over-discharge failure
Solution Approach 1:
The conversion power supply performs preliminary action by autonomously detecting battery voltage and proactively replenishing energy before over-discharge occurs. The controller continuously monitors battery clusters and activates the power supply module when voltage approaches critical thresholds, preventing the harmful effect of over-discharge before it happens.
Solution Approach 2:
The conversion power supply implements self-service by autonomously monitoring its own battery system and performing energy replenishment without external intervention. The controller automatically detects low-voltage conditions and activates the power supply module to recharge battery clusters, enabling the system to serve and protect itself.
2Reliability
If an independent charging tool is used to charge the battery when over-discharge is detected, then the battery can be replenished, but the system requires external intervention and cannot prevent over-discharge proactively
Solution Approach 1:
The conversion power supply implements self-service by autonomously monitoring its own battery system and performing energy replenishment without external intervention. The controller automatically detects low-voltage conditions and activates the power supply module to recharge battery clusters, enabling the system to serve and protect itself.
Solution Approach 2:
The conversion power supply employs feedback control by continuously monitoring battery voltage and using this information to control the power supply module. When the controller detects voltage below the threshold, it activates the power supply module to recharge, creating a closed-loop feedback system that automatically responds to battery status changes.
3Reliability
If the conversion power supply autonomously replenishes energy to battery clusters, then over-discharge is prevented, but the system complexity increases with additional components
Solution Approach 1:
The conversion power supply achieves multi-functionality by integrating battery monitoring, energy replenishment, and voltage regulation functions into a single system. The same power supply module that converts DC voltage also serves to recharge battery clusters, eliminating the need for separate charging equipment and reducing overall system complexity.
Solution Approach 2:
The conversion power supply merges the battery management function with the existing power supply module. By combining voltage conversion and battery replenishment functions into one integrated system controlled by a single controller, the patent reduces component count and system complexity while achieving autonomous over-discharge prevention.
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
The solution effectively prevents battery failure due to over-discharge by autonomously replenishing energy, balancing energy among battery clusters, and maintaining a slow-start voltage, thus ensuring the reliability and longevity of the energy storage system.
Implementation Method 1
control the first DC-DC converter to transmit electric energy received on the second side of the first DC-DC converter to the first side of the first DC-DC converter
Implementation Method 2
control the power supply module to output electric energy to the energy storage element
Data Source
AI summary
A conversion power supply and an autonomous electric energy replenishment method for an energy storage system are provided. An output terminal of the power supply module is connected to a second side of a first DC-DC converter through an energy storage element. A first side of the first DC-DC converter is connected to battery clusters of the energy storage system through a DC interface of the conversion power supply, so that under control by a conversion power supply controller, in a case that a voltage of a battery cluster is lower than a preset threshold, the first DC-DC converter receives the electric energy on the second side, and transmit the electric energy to the first side of the first DC-DC converter, to realize a electric energy replenishment function for at least one of the battery clusters and prevent battery failure due to over-discharge.