Shared-Electrolyte Battery Cells for Capacity and Cycle Life
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Solution Overview
Problem
Existing high-capacity batteries suffer from limited capacity and cycle life due to inconsistencies among battery cells, which are addressed by ensuring electrolyte uniformity and implementing a repair apparatus.
Innovation Solution
A high-capacity battery design with electrolyte sharing among cells, featuring a first hollow member for electrolyte communication, explosion venting, and a repair apparatus including lithium supplementation, adsorption, and mixing mechanisms to enhance performance and extend cycle life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a plurality of battery cells are connected in series-parallel combination mode to form a high-capacity battery, then the battery capacity increases, but the consistency of the battery cells deteriorates, resulting in limited capacity and cycle life
Solution Approach 1:
The patent merges the electrolyte systems of multiple battery cells into a single shared electrolyte system. The electrolyte regions of all battery cells are communicated through connecting channels, allowing the electrolyte to be shared across all cells. This merging approach ensures uniform electrolyte composition and concentration across all battery cells, thereby improving consistency while maintaining high capacity.
2Quantity of substance
If battery cells are connected in series-parallel combination mode, then the battery capacity increases, but the cycle life is limited due to cell inconsistency
Solution Approach 1:
The electrolyte systems of multiple battery cells are merged into a single shared system with communicating channels, ensuring all cells operate with identical electrolyte composition throughout their lifecycle, thereby extending cycle life.
Solution Approach 2:
The shared electrolyte system acts as a feedback mechanism where electrolyte composition and temperature conditions are automatically balanced across all battery cells through the communicating channels, ensuring consistent operating conditions that extend cycle life.
3Quantity of substance
If battery cells are connected in series-parallel combination mode, then the battery capacity increases, but thermal runaway risk increases due to cell differences
Solution Approach 1:
The patent merges the electrolyte systems into a shared system where temperature and composition are balanced across all cells, preventing localized thermal conditions that could trigger runaway and reducing overall thermal runaway risk in high-capacity batteries.
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 solution improves capacity and cycle life by ensuring electrolyte uniformity, reducing thermal runaway risk, and continuously supplementing lithium, thereby enhancing the battery's overall performance and longevity.
Implementation Method 1
the electrolyte regions of the plurality of battery cells communicate with each other to form an electrolyte sharing system
Implementation Method 2
an adsorption mechanism, and the adsorption mechanism is configured for adsorbing impurities in the electrolyte
Implementation Method 3
a mixing mechanism, and the mixing mechanism is configured for mixing the electrolyte uniformly
Data Source
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AI summary
The present application provides a high-capacity battery and a method for repairing the high-capacity battery, primarily resolving the problems with existing high-capacity batteries of limited upper capacity limits and limited number of cycles, caused by poor consistency. The high-capacity battery comprises multiple battery cells connected in parallel, an inner cavity of each battery cell comprises a gas region and an electrolyte region; and the electrolyte regions of the battery cells being in communication, thereby forming a shared electrolyte system. In the high-capacity battery of the present application, the electrolyte regions of each battery cell are communicated, so that the electrolytes of all battery cells are in the same system, the difference among battery cells is reduced, and the performance and cycle life of the high-capacity battery are increased.