Modular Battery Cell Balancing for Energy Storage Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Aging electrical infrastructures face increased vulnerability due to rising electrical energy demand and the integration of renewable energy sources, leading to peak demand pressures that threaten supply levels.
Innovation Solution
An electrical energy storage unit and control system featuring a battery system controller, battery packs with cell balancers using resistors, capacitors, or inductors, and a scalable design capable of monitoring and balancing cell state-of-charge and voltage, integrated with a relay controller for efficient charge and discharge management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical energy storage systems are implemented to manage peak demand, then reliability of energy supply is improved, but device complexity increases due to multiple control components and battery management systems
Solution Approach 1:
The system is divided into modular battery packs, each with its own controller and cell balancer, allowing independent management and scaling. This segmentation enables the system to handle complex battery management tasks through distributed control rather than a single centralized system, improving reliability while managing complexity through modularity.
Solution Approach 2:
The battery pack controllers dynamically adjust charging and discharging operations based on real-time cell state monitoring. The cell balancers automatically activate when voltage differences between cells exceed thresholds, providing dynamic adaptation to changing battery conditions without requiring constant human intervention or overly complex predetermined control logic.
2Manufacturing precision
If cell balancing operations are performed to equalize battery cell voltages, then manufacturing precision of energy distribution is improved, but energy loss increases due to resistive discharge
Solution Approach 1:
The cell balancing system applies different treatment to different battery cells based on their individual voltage states. Each cell is monitored independently and only discharged through its dedicated balancer when needed, rather than discharging all cells uniformly. This localized approach ensures precise energy distribution while minimizing unnecessary energy loss by targeting only the cells that require balancing.
Solution Approach 2:
The system changes the operational parameters of cell balancing based on the voltage difference threshold. When the voltage difference between cells exceeds a predetermined threshold, the cell balancer activates; otherwise, it remains inactive. This parameter-based control optimizes the balance between achieving precise energy distribution and minimizing energy loss by activating balancing operations only when necessary.
3Productivity
If battery systems are scaled up to meet increasing energy demand, then productivity of energy storage capacity is improved, but device complexity and cost increase
Solution Approach 1:
The battery system is organized into multiple battery packs that can be independently managed and scaled. Each pack contains multiple cells with individual monitoring and control, allowing the system to scale capacity by adding more packs rather than redesigning the entire system. This segmentation enables linear scaling of productivity while maintaining manageable complexity through standardized modular units.
Solution Approach 2:
The battery pack controller and cell balancer are designed as universal components that can manage any number of battery cells within a pack. The same control architecture and balancing circuitry can be applied across different system sizes, from small-scale to large-scale installations, enabling productivity scaling without proportionally increasing system complexity.
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 system provides a scalable, reliable, and cost-effective solution for managing electrical energy storage, enabling efficient balancing of battery cells and ensuring stable energy supply during peak demand periods, supporting the integration of renewable energy sources.
Implementation Method 1
the battery pack cell balancer includes resistors that are used to discharge energy stored in the battery cells
Implementation Method 2
the battery pack cell balancer includes capacitors, inductors, or both that are used to transfer energy between the battery cells
Implementation Method 3
the battery pack cell balancer includes capacitors, inductors, or both that are used to transfer energy between the battery cells
Data Source
AI summary
An electrical energy storage unit and control system, and applications thereof. In an embodiment, the electrical energy storage unit includes a battery system controller and battery packs. Each battery pack has battery cells, a battery pack controller that monitors the cells, a battery pack cell balancer that adjusts the amount of energy stored in the cells, and a battery pack charger. The battery pack controller operates the battery pack cell balancer and the battery pack charger to control the state-of-charge of the cells. In an embodiment, the cells are lithium ion battery cells.