Auxiliary Battery Resin Case Neutralization Against Electrolyte Stratification
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Solution Overview
Problem
Auxiliary batteries in vehicles experience stratification phenomena due to positive charging, which impairs electrolyte stirring and leads to battery degradation, affecting their performance in supplying power to vehicle auxiliaries.
Innovation Solution
A vehicle configuration that includes a static eliminator sheet made of material on the positive side of the triboelectric series, in contact with the resin case of the battery, which slides and transfers electrons to neutralize the positive charge, preventing stratification and maintaining battery performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle body is kept electrically insulated from the road, then the vehicle body is positively charged with static electricity, but the resin case of the auxiliary battery becomes charged with positive potential causing stratification of electrolyte
Solution Approach 1:
A static eliminator sheet is introduced as an intermediary component between the vehicle body and the battery resin case. This sheet facilitates controlled electron transfer to neutralize positive potential on the resin case, preventing electrolyte stratification while maintaining the vehicle body's electrical insulation for static electricity generation
Solution Approach 2:
The static eliminator sheet is selectively positioned only at the contact area between the battery resin case and the vehicle body. This localized approach neutralizes positive potential specifically where it causes harm (at the battery case) while preserving the overall electrical insulation of the vehicle body structure
2Reliability
If the resin case of the battery is positively charged, then the battery is electrically insulated from the vehicle body, but stirring of electrolyte is impaired and stratification phenomenon occurs
Solution Approach 1:
The static eliminator sheet acts as a mediator that selectively neutralizes positive potential on the resin case surface. This maintains sufficient electrical insulation for battery safety while eliminating the excessive positive charge that impedes electrolyte stirring, thereby restoring productivity
Solution Approach 2:
The static eliminator sheet changes the electrical potential parameter of the resin case from highly positive to near-neutral. This parameter change allows electrolyte to stir freely without the impeding effect of strong positive electrostatic forces, improving mixing efficiency
3Productivity
If static electricity is reduced on the vehicle body surface, then repulsion force with positively charged air flow is reduced, but the auxiliary battery performance deteriorates due to stratification
Solution Approach 1:
The static eliminator sheet applies local quality modification by neutralizing positive potential only at the battery resin case location, not across the entire vehicle body surface. This localized treatment preserves the vehicle body's overall positive charge for aerodynamic benefits while protecting the battery from stratification
Solution Approach 2:
The static eliminator sheet serves as a localized intermediary that selectively interacts with the battery resin case. It transfers electrons to neutralize positive potential at this specific location without affecting the broader vehicle body charge distribution, thus maintaining both aerodynamic performance and battery reliability
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 solution effectively neutralizes the positive charge on the resin case, facilitating electrolyte stirring and preventing battery degradation, thus ensuring the original performance of the auxiliary battery is maintained.
Implementation Method 1
The static eliminator sheet is made of a material on the positive side of a triboelectric series with respect to a material of the resin case, and electrons with negative charge resulting from friction during sliding between the resin case of the battery and the static eliminator sheet transfer from the static eliminator sheet to the resin case of the battery
Implementation Method 2
the resin case and the static eliminator sheet, held slidable and in contact with each other by the holding member, slide on each other due to vibrations of the vehicle body
Data Source
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AI summary
A vehicle is positively charged with static electricity due to an external factor. The vehicle includes a battery (13), a static eliminator sheet (14), and a holding member (15). The battery (13) includes at least one cell, an electrolyte, a resin case (131), and negative and positive terminals (134, 135). The resin case (131) accommodates the components and electrolyte of each cell. The negative terminal (134) is grounded to the vehicle body. The positive terminal (135) is supplied with electric power from a charger. The static eliminator sheet (14) is made of a material on a positive side of a triboelectric series with respect to a material of the resin case (131). The holding member (15) holds the static eliminator sheet (14) and the resin case (131) in contact with each other. The holding member (15) holds the battery (13) at a predetermined location of the vehicle body in a state where the resin case (131) and the static eliminator sheet (14) are slidable due to vehicle body vibrations.