Current Collecting Plate Segmentation for Electrolyte Infiltration
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Solution Overview
Problem
Existing lithium-ion batteries face difficulties in electrolyte solution infiltration due to the connection of electrode plates and current collecting plates, which affects electrochemical performance.
Innovation Solution
The electrochemical apparatus features a design where conductive portions are arranged between electrode plates and current collecting plates, creating fluid conductive spaces to facilitate electrolyte solution infiltration, with non-overlapping or partially arranged conductive portions on current collecting plates to improve infiltration efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive portions are arranged between electrode plates and current collecting plates to ensure electrical connection, then electrical conductivity is improved, but fluid conductive space for electrolyte solution infiltration is reduced
Solution Approach 1:
The current collecting plate is divided into multiple regions: a first region with conductive portions for electrical connection and a second region without conductive portions for electrolyte solution infiltration. This segmentation allows both electrical conductivity and fluid infiltration to coexist by spatially separating their respective functions.
Solution Approach 2:
Different regions of the current collecting plate are assigned different properties: the first region has conductive portions (solder or conductive adhesive) for reliable electrical connection, while the second region remains free of conductive portions to provide fluid conductive space for electrolyte solution infiltration. This local differentiation resolves the contradiction between electrical connection and fluid infiltration.
2Strength
If current collecting plates are welded on flattened planes of blank foils to ensure mechanical strength, then structural stability is improved, but infiltration channels for electrolyte solution are blocked
Solution Approach 1:
The current collecting plate structure is segmented into a first region for mechanical connection (with conductive portions for welding or adhesive bonding) and a second region for fluid infiltration (without conductive portions). This segmentation maintains mechanical strength where needed while preserving infiltration channels in other areas.
Solution Approach 2:
The solution transitions from a uniform current collecting plate design to a differentiated design with distinct functional regions. By adding the dimension of spatial differentiation (first region vs. second region), the design simultaneously achieves mechanical connection strength and infiltration channel preservation.
Data Source
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AI summary
Disclosed is an electrochemical apparatus and an electronic apparatus for mitigating the difficulty of infiltration in an electrolyte solution and improving the electrochemical performance. The electrochemical apparatus includes an electrode assembly, a first current collecting member including a first current collecting plate and a first conductive portion, and a second current collecting member including a second current collecting plate and a second conductive portion. The first conductive portion is located between the first current collecting plate and the electrode assembly, and the second conductive portion is located between the second current collecting plate and the electrode assembly. The first current collecting plate includes a first portion, the second current collecting plate includes a second portion, and the electrode assembly satisfies at least one of the following conditions: no first conductive portion is provided on the first portion, and no second conductive portion is provided on the second portion.