Dynamic Battery Voltage Reconfiguration for Grid Adaptation
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Solution Overview
Problem
Existing electric energy storage systems face challenges in adapting to varying external components and environmental conditions, leading to inefficiencies and reduced flexibility, particularly due to disparities in voltage and charge state among energy storage blocks, which can result in overcharging, deep discharging, or polarity reversal.
Innovation Solution
A battery management system with a terminal arrangement and switch assembly that dynamically adjusts the electric configuration of energy storage blocks to provide multiple rated voltages, allowing for flexible adaptation to external components and optimizing energy storage performance without requiring additional electronic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed electric configuration of energy storage blocks is used, then the system structure is simple, but the system cannot adapt to varying external components and environmental conditions
Solution Approach 1:
The patent implements a dynamic switch assembly that can reconfigure the electric connections between energy storage blocks in real-time. The switch assembly includes multiple switching elements that can dynamically change the series/parallel configuration of battery blocks based on external load requirements and environmental conditions, transforming a static system into an adaptive dynamic system.
Solution Approach 2:
The battery management system is designed to provide multiple rated voltages (first rated voltage and second rated voltage) from the same energy storage blocks by reconfiguring their electric connections. This multi-functionality allows the system to adapt to different external components and applications without requiring separate battery systems for each voltage requirement.
2Reliability
If individual monitoring of each energy storage block is implemented, then the state of charge can be accurately tracked, but the device complexity increases
Solution Approach 1:
The patent divides the battery system into multiple independently monitorable energy storage blocks, each with its own voltage and state of charge characteristics. The controller monitors each block individually and can selectively connect or disconnect specific blocks based on their state, enabling accurate tracking of each block's condition while maintaining system-level control.
Solution Approach 2:
The switch assembly acts as an intermediary between the energy storage blocks and the external load, controlled by the battery management system. This intermediary component enables the controller to regulate which blocks are active and how they are connected, facilitating accurate monitoring and control without requiring direct complex connections between all blocks and the load.
3Power
If energy storage blocks with different voltages are connected in series, then the total voltage increases, but voltage disparities can lead to overcharging, deep discharging, or polarity reversal
Solution Approach 1:
The controller continuously monitors the voltage and state of charge of each energy storage block and uses this feedback information to dynamically control the switch assembly. Based on the monitored data, the controller can adjust the electric configuration to ensure that blocks with different voltages are properly balanced, preventing overcharging, deep discharging, and polarity reversal while maintaining the desired total voltage output.
Solution Approach 2:
The system dynamically changes the electric configuration parameters (series/parallel connections) of the energy storage blocks based on their individual voltage states. When voltage disparities are detected, the controller can reconfigure the connections to equalize the charge distribution across blocks, thereby maintaining reliability while achieving the required total voltage through parameter adjustment rather than fixed configuration.
Data Source
AI summary
The present invention provides a battery management system and an electric energy storage equipped with the battery management system, which enable the adjustment of one or more variable connection voltages. In particular the energy storage of the present invention may provide highly dynamic varying output voltages, for instance in the form of an AC voltage. In this way energy storages may, for instance, be directly operated in connection with an electric power grid or may establish electric AC power grids.