Battery Electrolyte Wetting Using Magnetorheological Vibration
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Solution Overview
Problem
The manufacturing process of secondary batteries is slowed down due to the extended aging period required for electrolyte wetting, which typically takes about three days.
Innovation Solution
An electrolyte wetting apparatus utilizing a magnetorheological fluid and a magnetic field application device to induce vibration in the secondary battery, enhancing electrolyte wetting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the secondary battery is stored for aging to allow electrolyte wetting, then the electrolyte sufficiently impregnates the electrode assembly, but the manufacturing rate is slowed down due to the extended aging period of about three days
Solution Approach 1:
The patent applies mechanical vibration to the secondary battery during the aging process. The vibration device generates vibrations that facilitate electrolyte distribution and penetration into the electrode assembly, enabling sufficient wetting to be achieved in a much shorter time period, thus resolving the contradiction between wetting completeness and manufacturing rate.
Solution Approach 2:
The patent employs periodic vibration cycles during the aging process. By applying vibrations intermittently rather than continuously, the electrolyte is periodically agitated to enhance penetration, achieving effective wetting while optimizing the overall aging time and maintaining productivity.
2Manufacturing precision
If the aging period is extended to ensure thorough electrolyte impregnation, then the electrode assembly is sufficiently wetted, but the manufacturing process efficiency is reduced
Solution Approach 1:
Mechanical vibration is applied during aging to enhance electrolyte distribution uniformity throughout the electrode assembly. The vibration promotes even penetration and eliminates localized dry spots, achieving uniform wetting in reduced time and thereby reducing the loss of time while maintaining manufacturing precision.
Solution Approach 2:
The patent replaces passive storage-based aging with an active vibration-based system. This substitution transforms the aging process from a time-dependent passive diffusion process to an accelerated active transport process, significantly reducing aging time while improving electrolyte distribution uniformity.
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 apparatus improves electrolyte wetting rate and maintains thermal stability, thereby optimizing the manufacturing process and extending the battery's longevity.
Implementation Method 1
a magnetorheological fluid configured to wrap the first mold; and a magnetic field application device configured to apply a time-varying magnetic field to the magnetorheological fluid so that the secondary battery vibrates
Data Source
AI summary
An electrolyte wetting apparatus includes a first mold configured to wrap a case of a secondary battery, an interior of the case accommodating an electrode assembly and an electrolyte that impregnates the electrode assembly; a magnetorheological fluid configured to wrap the first mold; and a magnetic field application device configured to apply a time-varying magnetic field to the magnetorheological fluid so that the secondary battery vibrates.