Storage Battery Control Device Preventing Simultaneous Charging Discharging
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Solution Overview
Problem
In microgrid systems with multiple storage batteries, simultaneous discharging and charging lead to significant electric power losses due to DC/AC conversion, transmission, and internal resistance, resulting in wasteful energy consumption and battery deterioration.
Innovation Solution
A storage battery control device that communicates with other devices via a network to estimate power demand and control charging/discharging modes based on a mode determination threshold, preventing simultaneous charging and discharging among storage batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multiple storage batteries operate independently without coordination, then each battery can respond quickly to power demands, but simultaneous charging and discharging occurs causing energy loss and wasted power
Solution Approach 1:
The patent merges the control of multiple storage batteries into a coordinated system where a control device aggregates power demand information and linkage point power flow data to determine the optimal charging/discharging state for each battery. This coordination prevents simultaneous charging and discharging by ensuring that when one battery discharges, another charges, thereby eliminating energy loss while maintaining rapid response capability.
Solution Approach 2:
The control device implements feedback by continuously acquiring power demand information and linkage point power flow data, comparing the current state with target states, and adjusting the charging/discharging commands accordingly. This feedback mechanism ensures that batteries respond quickly to changing conditions while maintaining coordinated operation to prevent energy loss.
2Loss of energy
If storage batteries are controlled to prevent simultaneous charging and discharging, then energy efficiency improves, but system complexity increases due to communication and coordination requirements
Solution Approach 1:
The control device performs multiple functions: it acquires power demand information, collects linkage point power flow data, determines optimal charging/discharging states, and sends control commands to multiple batteries. By consolidating these functions in a single control device rather than distributing complexity across multiple independent controllers, the system reduces overall complexity while achieving energy efficiency.
Solution Approach 2:
The control device acts as an intermediary between the power system and multiple storage batteries. It receives power demand information and linkage point power flow data from the system, processes this information to determine optimal states, and translates these into coordinated control commands for the batteries. This intermediary role simplifies the interaction complexity by providing a centralized coordination point.
3Device complexity
If storage batteries operate without coordinated control, then device simplicity is maintained, but battery lifetime is shortened due to wasteful charging/discharging cycles
Solution Approach 1:
The control device performs preliminary action by proactively determining the optimal charging/discharging state for each battery based on power demand information and linkage point power flow data before simultaneous charging/discharging can occur. This advance coordination prevents wasteful operation cycles that would otherwise shorten battery lifetime, while the control logic remains relatively simple by using straightforward state comparison and command issuance.
Data Source
AI summary
A plurality of storage battery modules include storage battery control devices that can mutually communicate with each other and obtain a demand for electric power in a predetermined consumer in which the plurality of storage battery modules are provided. The storage battery control devices mutually transmit and receive charging/discharging electric power of the storage batteries and control charging/discharging of the plurality of storage battery modules, respectively, on the basis of the demand for electric power in the predetermined consumer.