Supercapacitor Collector Plate Design for Resistance Reduction
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Solution Overview
Problem
Conventional angular super capacitors experience resistance issues due to limited lead sizes and contact resistance at the electrode terminals, leading to heat generation and deterioration during high current charging and discharging.
Innovation Solution
The apparatus features an electrode stack with cathode and anode leads formed on one side, alternately stacked with collector plates connected through laser welding, and integrally formed external terminals, reducing resistance by distributing charge flow and eliminating the need for rivets, while allowing easy electrolyte impregnation through collector plate holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If leads of limited sizes are used to connect electrodes to external terminals, then the device structure is simplified, but resistance increases and heat is generated during high current charging and discharging
Solution Approach 1:
The patent transitions from one-dimensional point contacts (leads) to two-dimensional surface contacts (collector plates). The collector plates are disposed at both sides of the electrode stack and provide extensive surface area for electrical connection, effectively moving the connection interface from a limited lead dimension to a expanded plate dimension, thereby reducing resistance without complicating the overall device structure.
Solution Approach 2:
The patent merges the functions of the leads and external terminals by making the external terminals integrally formed with the collector plates. This eliminates the need for separate rivet connections and leads, combining multiple components into a unified structure that reduces contact resistance and simplifies the device architecture simultaneously.
2Strength
If rivets are used to bind leads to external terminals, then mechanical connection is achieved, but contact resistance occurs and heat is generated
Solution Approach 1:
The patent replaces the mechanical rivet connection system with a direct integral formation system. Instead of using rivets to mechanically bind leads to external terminals, the external terminals are integrally formed with the collector plates, eliminating the mechanical fastening interface and its associated contact resistance while maintaining strong mechanical connection.
3Ease of manufacture
If conventional electrode stacking is used, then manufacturing is simplified, but electrolyte impregnation is difficult
Solution Approach 1:
The patent incorporates electrolyte flow holes in the collector plates before the electrode stacking is completed. This preliminary action ensures that electrolyte pathways are pre-established, allowing for easy and thorough electrolyte impregnation during the manufacturing process without requiring complex subsequent operations, thereby maintaining manufacturing simplicity while improving 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
This design enhances the resistance characteristics of the electrode and contact areas, improves durability by preventing deterioration, and increases the energy storage capacity by optimizing internal space and electrolyte distribution.
Implementation Method 1
collector plates disposed at both sides of the electrode stack, connected to the cathode lead and the anode lead, and provided with external terminals and one or more electrolyte flow holes
Data Source
AI summary
Disclosed herein is an apparatus for storing an electric energy, the apparatus including: an electrode stack in which a cathode and an anode in which a cathode lead and an anode lead are respectively formed are alternately stacked; and collector plates disposed at both sides of the electrode stack, connected to the cathode lead and the anode lead, and provided with external terminals and one or more electrolyte flow holes.