Secondary Battery Electrolyte Release for Wider Voltage Operation
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Solution Overview
Problem
Secondary batteries face limitations due to electrolytes with narrow action voltage ranges, leading to underutilization despite having good physical properties, which affects battery performance.
Innovation Solution
A secondary battery design incorporating a reinforcement electrolyte member with a packaging material that oxidizes at a set voltage, releasing a second electrolyte to impregnate the electrode assembly, enhancing battery performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrolyte with good physical properties is used, then battery performance can be improved, but the electrolyte is not fully utilized due to narrow action voltage range
Solution Approach 1:
The packaging material is pre-installed in the battery case containing the second electrolyte before battery assembly. During subsequent charging/discharging cycles, the packaging material oxidizes at a specific voltage threshold, automatically releasing the second electrolyte to expand the voltage range without requiring external intervention
Solution Approach 2:
The oxidation potential of the packaging material is specifically designed to change at a predetermined voltage during battery operation. This voltage-triggered parameter change enables the packaging material to transition from a contained state to a released state, allowing the second electrolyte to be introduced at the optimal moment to extend the action voltage range
2Adaptability or versatility
If a packaging material that oxidizes at set voltage is used, then the electrolyte can be released to expand voltage range, but the device structure becomes more complex
Solution Approach 1:
The packaging material serves multiple functions simultaneously: it acts as both the container for the second electrolyte and the voltage-sensitive release mechanism. This merging of containment and control functions into a single component simplifies the overall structure compared to using separate containers and trigger mechanisms
Solution Approach 2:
The packaging material autonomously performs the electrolyte release function based on its own oxidation properties at the set voltage. The system self-regulates the electrolyte introduction timing without external control, eliminating the need for additional control circuits or manual intervention
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 oxidation of the packaging material at a set voltage allows for the stable release of an electrolyte with excellent physical properties, significantly improving battery performance and preventing defects by uniformly impregnating the electrode assembly.
Implementation Method 1
the packaging material is provided with an oxidation part which is oxidized and decomposed at a set voltage
Data Source
AI summary
Provided is a secondary battery comprising: an electrode assembly; a battery case which accommodates the electrode assembly; a first electrolyte which is accommodated in the battery case and primarily impregnates the electrode assembly; and a reinforcement electrolyte member which comprises a packaging material and a second electrolyte, wherein the packaging material is accommodated in the battery case and provided with an oxidation part which is oxidized and decomposed at a set voltage, and the second electrolyte is stored in the packaging material, released to the outside of the packaging material due to the decomposition of the oxidation part, and secondarily impregnates the electrode assembly.