Smart Battery Switching for Series-Parallel Cell Equalization
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Solution Overview
Problem
Series-connected battery systems face challenges with voltage imbalances due to variations in cell characteristics and temperature differences, leading to reduced battery life and performance, and existing battery management systems struggle to safely handle concurrent charging and discharging processes.
Innovation Solution
The smart battery switch enables kinematic voltage transitions between series and parallel configurations, allowing for efficient low-voltage parallel charging and series voltage output using an isolated load charging method, which separates charging and discharging cycles and integrates with fluctuating renewable energy sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If batteries are connected in series to achieve higher voltage levels, then the system can provide sufficient voltage for the load, but voltage imbalances occur due to variations in individual cell characteristics, aging, or temperature differences
Solution Approach 1:
The patent implements dynamic reconfiguration of battery connections using switching circuits that can change the topology between series and parallel configurations. This allows the system to adaptively balance voltage across cells while maintaining sufficient output voltage for the load, resolving the contradiction between high voltage output and voltage balance reliability.
2Loss of energy
If electrical switches are used to deactivate batteries during off-mode, then energy conservation is improved, but the system struggles to simultaneously handle both battery charging and discharging functions
Solution Approach 1:
The patent segments the battery system into multiple independently controllable modules with dedicated switching circuits for each. This segmentation allows different modules to perform charging and discharging operations simultaneously or sequentially, enabling the system to conserve energy during off-mode while maintaining the capability to handle both charging and discharging functions when needed.
Solution Approach 2:
The patent employs dynamic switching circuits that can reconfigure battery connections in real-time based on system needs. This dynamic capability allows the system to transition between energy conservation mode (deactivating batteries during off-mode) and operational mode (simultaneously handling charging and discharging), resolving the contradiction between energy conservation and functional versatility.
3Device complexity
If traditional fixed single voltage configurations are used, then the system is simple to implement, but the batteries are over-designed and cannot adapt to fluctuating renewable energy sources
Solution Approach 1:
The patent implements dynamic reconfiguration capability that allows the battery system to adapt its voltage and current characteristics to match fluctuating renewable energy sources. The switching circuits enable real-time adjustment of battery connections, allowing the system to integrate variable renewable energy input while maintaining simple operational control through automated switching logic.
Solution Approach 2:
The patent creates a universal battery management system that can handle multiple functions including charging from renewable sources, discharging to loads, voltage balancing, and energy conservation. The reconfigurable architecture provides multi-functionality while maintaining relative simplicity through integrated control circuits that automate the various operations.
Data Source
AI summary
An innovative smart battery switch enhances the affordability and reliability of sustainable energy. The core of this system is a smart switch capable of alternating between series and parallel modes. In the parallel off-mode, it automatically enables battery charging and cell equalization, thereby replacing complex and expensive battery management systems. This feature, coupled with the system's low voltage charging capability, significantly extends battery lifespan by minimizing cell stress. The integrated kinematic charger optimizes solar photovoltaic (PV) energy utilization, adapting efficiently to varying solar conditions. This charger not only improves solar energy conversion efficiency but also reduces the solar panel size requirement, making sustainable energy solutions more accessible. The system's adaptability, including variable voltage outputs and IoT compatibility, extends its applications to a range of devices, from LED lighting to electric vehicles, offering a cost-effective, sustainable approach to energy management.