Separable Battery Stack With Electrolyte Isolation Channels
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Solution Overview
Problem
Existing lithium-ion batteries face safety hazards due to potential thermal runaway caused by short circuits and electrolyte combustion, necessitating a new battery structure that enhances safety and facilitates efficient production, maintenance, and recycling.
Innovation Solution
A separable secondary cell stack design comprising independent positive, negative, and electrolyte modules connected by conveying channels, achieving energy and material isolation, allowing for modular operations and monitoring, and enabling electrolyte refill and active lithium refill.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a large area of positive and negative electrode interface is filled with electrolyte to achieve high power and high integration, then power density is improved, but safety deteriorates due to potential thermal runaway combustion and explosion
Solution Approach 1:
The battery system is divided into separate modules: positive electrode module, negative electrode module, and electrolyte module. These modules are spatially isolated and connected through conveying channels, preventing direct contact between electrodes and electrolyte. This segmentation eliminates the risk of thermal runaway while maintaining power density through efficient electrolyte circulation.
2Ease of operation
If modular decomposition of different modules is implemented to achieve convenient replacement and maintenance, then ease of operation is improved, but device complexity increases due to multiple separate components
Solution Approach 1:
The conveying channels serve multiple functions: they connect the separate modules, enable electrolyte circulation, and provide a standardized interface for module assembly and disassembly. This multi-functionality reduces the need for additional components while maintaining ease of operation and modular replacement capability.
Data Source
AI summary
A separable secondary battery stack includes a positive electrode module, a negative electrode module, and an electrolyte module. Every two of the positive electrode module, the negative electrode module, and the electrolyte module are mutually connected by means of a conveying channel in a loop; and the conveying channel is used for conveying an electrolyte.