Wound Cathode Lithium Primary Battery for Long-Period Pulse Output
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Solution Overview
Problem
Conventional bobbin-type lithium primary cells fail to meet the demands of higher and longer-lasting current capacity required for smart meter communication due to structural limitations, particularly in providing long-period pulses.
Innovation Solution
A lithium primary battery design featuring a wound cathode with a cathode collector coated in carbon powder, wound at least twice, and secured by an elastic member within a case, which enhances electrical output characteristics without altering the shape of the lithium anode or separator, thereby maximizing the electrode area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional bobbin-type cathode structure is used, then the battery structure is simple and easy to manufacture, but the electrode area is limited and cannot provide sufficient current capacity for long-period pulses
Solution Approach 1:
The cathode is transformed from a two-dimensional bobbin winding to a three-dimensional wound structure that coils around the anode multiple times. This dimensional change maximizes the cathode surface area in contact with the electrolyte and anode, thereby increasing the effective electrode area and current capacity without complicating the manufacturing process
Solution Approach 2:
The cathode is wound in a nested configuration around the central anode, with each turn of the cathode wrapping around the previous turns. This nested arrangement optimizes space utilization within the cylindrical case, maximizing electrode area while maintaining structural simplicity and ease of assembly
2Power
If the cathode is wound at least twice around the anode, then the electrode area is maximized and output characteristics are improved, but the device complexity increases
Solution Approach 1:
The cathode is configured to wind around the anode in a three-dimensional spiral pattern rather than a simple two-dimensional bobbin structure. This dimensional transformation increases the electrode surface area and improves output characteristics while maintaining a straightforward manufacturing process that does not significantly increase device complexity
Solution Approach 2:
The cathode winding structure provides dynamic flexibility in terms of the number of turns (at least twice), allowing optimization of power output characteristics based on specific application requirements without fundamentally changing the overall device architecture or manufacturing approach
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 lithium primary battery with a wound cathode achieves improved electrical output characteristics by maximizing the electrode area and maintaining stability, surpassing the limitations of conventional bobbin-type cells in terms of current capacity and pulse duration.
Implementation Method 1
a battery, which is a driving source for generating electricity by causing oxidation and reduction of chemical substances
Implementation Method 2
a battery, which is a driving source for generating electricity by causing oxidation and reduction of chemical substances
Data Source
AI summary
Provided are a lithium primary battery in which a structure of an electrode closely related to output characteristics of the battery is improved to expand a reaction area, thus improving the output characteristics of the battery, and a method for manufacturing the lithium primary battery.