Anode Contact Strip Assembly for Uniform Current Distribution
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Solution Overview
Problem
The performance and reliability of electrochemical cells, such as chloralkali cells, are hindered by non-uniform current distribution due to the voltage distribution and current flow from the anode to the cathode, leading to increased cell voltage and potential membrane damage.
Innovation Solution
An anode assembly featuring a plurality of V-shaped, U-shaped, or Z-shaped elements positioned outside the anode shell, made from materials like nickel-titanium, which provide conductive contact strips for uniform current distribution and electrical continuity between cells when stacked, and are designed to align with internal current bars for optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional anode assembly with simple current bars is used, then device complexity is low, but current distribution uniformity is poor leading to non-uniform current flow
Solution Approach 1:
The anode assembly is segmented into multiple functional components: current bars, V-shaped/U-shaped/Z-shaped elements, and contact strips. This segmentation allows each component to perform a specific function in the current distribution pathway, transforming a simple structure into a multi-stage current distribution system that achieves uniformity without excessive complexity.
Solution Approach 2:
V-shaped, U-shaped, or Z-shaped elements serve as intermediary components between the current bars and the anode. These intermediaries redirect and distribute current more uniformly across the anode surface, preventing direct concentration of current at single contact points and thereby improving current distribution uniformity.
2Power
If non-uniform current distribution occurs, then cell voltage increases, but membrane reliability deteriorates due to potential damage
Solution Approach 1:
The anode assembly design creates equipotential regions across the anode surface through the strategic placement of V-shaped, U-shaped, or Z-shaped elements. By ensuring that different regions of the anode are at similar potentials, the system prevents localized current concentration that would otherwise increase cell voltage and damage the membrane, thereby maintaining both low voltage and high reliability.
3Ease of manufacture
If simple anode assembly is used, then ease of manufacture is high, but current flow uniformity is poor impacting performance
Solution Approach 1:
Different components of the anode assembly have different local qualities optimized for their specific functions: current bars provide structural support and main current input, while V-shaped/U-shaped/Z-shaped elements provide current redistribution. This local quality differentiation allows the system to achieve overall current uniformity through specialized components rather than requiring uniform complexity throughout the entire assembly.
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 configuration ensures a uniform current distribution across the ion exchange membranes, reducing the risk of membrane damage and maintaining cell performance over extended operation, as demonstrated by comparative experiments showing reduced damage to anion exchange membranes.
Implementation Method 1
a plurality of V-shaped, U-shaped, or Z-shaped elements positioned outside the anode shell and in electrical contact with the anode
Implementation Method 2
each of the V-shaped or the U-shaped elements comprises two legs of equal length meeting at the apex... each of the V-shaped, the U-shaped, or the Z-shaped elements is made of a sheet of explosion bonded or laser cladded Ni-Ti (nickel-titanium)
Data Source
Figure 1
Figure 2A~2C
Figure 3A~3B
AI summary
Provided herein are anode assembly, conductive contact strips, electrochemical cells containing the anode assembly and the conductive contact strips, and methods to use and manufacture the same, where the anode assembly includes a plurality of V-shaped, U-shaped, or Z- shaped elements positioned outside the anode shell and in electrical contact with the anode.