Gel Electrolyte Battery Layout for Rigidity Without Capacity Loss
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Solution Overview
Problem
Secondary batteries face safety issues due to deformation during use, which can lead to damage and affect performance, while maintaining good battery capacity is crucial.
Innovation Solution
A gel electrolyte battery design with a specific cross-linking degree distribution pattern, featuring a first gel electrolyte with low cross-linking on the electrode surface and a second gel electrolyte with high cross-linking between electrode sheets, enhancing rigidity and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If gel electrolyte with high cross-linking degree is used throughout the battery, then battery rigidity and safety are improved, but battery capacity and electrical properties deteriorate due to poor electrolyte infiltration
Solution Approach 1:
The patent applies different cross-linking degrees of gel electrolyte to different spatial regions within the battery. The first gel electrolyte with lower cross-linking degree is positioned adjacent to electrode sheets to ensure good infiltration and maintain capacity, while the second gel electrolyte with higher cross-linking degree is positioned in the middle region to provide rigidity and resistance to external force. This local differentiation resolves the contradiction between rigidity and electrical performance.
Solution Approach 2:
The gel electrolyte system is segmented into two distinct types with different cross-linking degrees, arranged in a specific spatial sequence. This segmentation allows each region to fulfill its specific function: the low cross-linking region handles ion transport and electrode interaction, while the high cross-linking region provides structural support and deformation resistance.
2Reliability
If gel electrolyte with low cross-linking degree is used throughout the battery, then battery capacity and ion transport are improved, but battery rigidity and deformation resistance deteriorate
Solution Approach 1:
The patent positions the low cross-linking degree gel electrolyte specifically in regions requiring good ion transport and electrode infiltration, while placing high cross-linking degree gel electrolyte in regions requiring structural support. This local quality differentiation ensures that each region optimizes for its specific function, resolving the contradiction between capacity and rigidity.
3Ease of manufacture
If uniform gel electrolyte distribution is used, then manufacturing simplicity is maintained, but the ability to simultaneously optimize rigidity and capacity is reduced
Solution Approach 1:
The electrolyte system is divided into two segments with different properties arranged in a specific sequence, enabling simultaneous optimization of rigidity and capacity without significantly complicating the manufacturing process.
Solution Approach 2:
The patent uses a composite electrolyte system combining two types of gel electrolytes with different cross-linking degrees. This composite approach allows the battery to achieve both high rigidity and good electrical performance, overcoming the limitations of uniform electrolyte distribution.
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 design improves battery safety by resisting deformation and maintains capacity through better electrolyte infiltration and ion transport, balancing rigidity and electrical properties.
Implementation Method 1
the surface of the electrode sheet with a low cross-linking degree can absorb and swell with more liquid electrolyte, thereby having better infiltration in the pores of and on the surface of the electrode sheet
Implementation Method 2
the design of high cross-linking degree distant from the electrode surface can give the battery higher rigidity, further enhance the battery's ability to resist deformation during use
Data Source
AI summary
A gel electrolyte battery, comprising gel electrolytes, wherein the gel electrolytes comprise a first gel electrolyte and a second gel electrolyte, the first gel electrolyte is located in at least part of at least one side surface of at least one electrode sheet, and the second gel electrolyte is located in the direction of the first gel electrolyte distant from the electrode sheet. The electrode sheet is a positive electrode sheet or a negative electrode sheet.