Slitted Current Collector for Fast Electrolyte Infiltration
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Solution Overview
Problem
Battery production faces challenges in drying laminates efficiently, as drying unrolled laminates occupies excessive space, while drying rolled laminates is time-consuming, and there is a need for rapid electrolyte infiltration in rolled or folded battery structures.
Innovation Solution
The electrode design features a current collector with slits and bores that facilitate liquid and ion transport, allowing for swift drying and electrolyte infiltration, comprising a deformed structure with through-going bores and channels that enable efficient liquid transport when rolled or folded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the laminate is dried while unrolled, then the drying space is reduced, but the rolling of the laminate becomes difficult
Solution Approach 1:
The current collector is divided into multiple segments by creating slits that extend through its thickness. These slits allow the laminate to be rolled into compact configurations while maintaining structural integrity and facilitating electrolyte distribution throughout the rolled structure.
Solution Approach 2:
The slits in the current collector create additional dimensional pathways for electrolyte flow. When the laminate is rolled, these slits form channels that allow electrolyte to penetrate efficiently into the compacted structure, solving both the rolling difficulty and electrolyte infiltration issues.
2Volume of stationary object
If the laminate is dried while rolled, then the space is reduced, but the drying time increases significantly
Solution Approach 1:
The slits divide the current collector into segments that create numerous channels for electrolyte penetration. This segmented structure allows electrolyte to reach internal regions of the rolled laminate much faster, reducing drying time while maintaining compact storage space.
Solution Approach 2:
The slits function as hydraulic channels that facilitate rapid fluid (electrolyte) transport through the current collector and into the laminate. This hydraulic pathway enables fast electrolyte infiltration even when the laminate is in a compact rolled state, significantly reducing drying time.
3Volume of stationary object
If the laminate is rolled or folded for compact storage, then the space efficiency is improved, but the electrolyte infiltration speed decreases
Solution Approach 1:
The slits segment the current collector into multiple sections, creating a network of channels that distribute electrolyte rapidly throughout the rolled or folded laminate. This segmentation maintains fast infiltration speed despite the compact configuration.
Solution Approach 2:
The slits introduce additional dimensional pathways through the current collector thickness, creating three-dimensional channels for electrolyte flow. This multi-dimensional pathway system enables rapid electrolyte distribution even when the laminate is compressed into a compact rolled or folded state.
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
This design enables faster production by reducing drying time and space requirements, allowing for the rapid infiltration of electrolytes into the laminate, enhancing the efficiency of battery manufacturing and performance.
Implementation Method 1
the current collector comprises a plurality of slits, having a length of at least 2 μm, the laminate being deformed to provide the slits with a width of at least 2 μm
Data Source
AI summary
An electrode, a battery laminate, a battery and methods of providing the electrode, laminate or battery, where the electrode has an electrode layer and a current collector both having through-going bores of a size allowing liquid transport through the current collector and the electrode layer. The bores are provided by providing elongate slits or weakened portions and deforming the electrode. The current collector also has channels therein allowing liquid to travel along a plane of the current collector. In this manner, the drying of and introduction of electrolyte therein is made much faster.