Electrode Assembly Venting Structure for Battery Gas Discharge
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Solution Overview
Problem
Existing electrode assemblies struggle with gas discharge, as generated gas tends to stay within the composite material layer, inhibiting battery reactions.
Innovation Solution
The electrode assembly incorporates a groove portion and ventilation portions to facilitate easy discharge of gas, with the groove extending along the plane direction and exposing the second current collector towards the separator side, and utilizing divided separators to form slits for gas flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the second current collector is exposed toward the separator side, then gas flow path area is increased, but metal deposition risk increases
Solution Approach 1:
The invention applies local quality by exposing the second current collector only in the specific region of the groove portion where it serves as a gas discharge pathway, rather than exposing it throughout. This localized exposure increases the gas flow path area where needed while minimizing the surface area vulnerable to metal deposition, thus resolving the contradiction between flow path area and deposition prevention.
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 configuration allows for stable and efficient discharge of gas generated within the electrode assembly, preventing metal deposition and short circuits, thereby enhancing battery performance.
Implementation Method 1
Through the ventilation portion, gas generated within the electrode assembly can be easily discharged outside
Data Source
AI summary
An electrode assembly includes: a first current collector; a first composite material layer; a second current collector; a second composite material layer; and a separator. The first composite material layer is provided on the first current collector. The second composite material layer is provided on the second current collector. The separator is disposed between the first composite material layer and the second composite material layer. The second composite material layer includes a groove portion. The groove portion extends along a plane direction of the first composite material layer. A ventilation portion is formed at a position that is in contact with the groove portion.