Auxiliary Battery Resin Case Charge Neutralization in Vehicles
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Solution Overview
Problem
Auxiliary batteries in vehicles experience stratification phenomena due to static electricity, leading to impaired electrolyte stirring and battery degradation, despite existing static eliminators that reduce surface charges on vehicle bodies.
Innovation Solution
A vehicle configuration that includes a static eliminator sheet made of triboelectrically positive materials in contact with the resin case of the auxiliary battery, allowing for sliding and electron transfer to neutralize positive charges, thereby 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 to reduce static electricity discharge, then the vehicle body accumulates positive charge, but the resin case of the auxiliary battery also accumulates positive charge causing electrolyte stratification
Solution Approach 1:
A conductive member (metal sheet or wire) is introduced as an intermediary between the resin case and the vehicle body. This intermediary provides a dedicated electrical conduction path that allows the resin case to discharge accumulated positive charge to the grounded vehicle body, preventing electrolyte stratification while maintaining the overall electrical insulation of the vehicle body from the road.
Solution Approach 2:
The electrical insulation system is segmented into two independent paths: (1) the vehicle body remains electrically insulated from the road to prevent static discharge, and (2) the resin case is electrically connected to the vehicle body through a conductive member to prevent charge accumulation. This segmentation allows both requirements to coexist without conflict.
2Object-affected harmful factors
If the resin case is electrically charged with positive potential, then static electricity is reduced on the vehicle body, but stirring of the electrolyte is impaired and battery performance deteriorates
Solution Approach 1:
The conductive member acts as an intermediary that selectively removes positive charge from the resin case through electrical conduction to the grounded vehicle body, preventing the harmful effects of charge accumulation on battery performance while allowing controlled charge management.
Solution Approach 2:
The natural convection and stirring mechanisms of the electrolyte are replaced by an electrical conduction system. Instead of relying on mechanical movement to prevent charge accumulation, an electrical field-based conduction path is established through the conductive member to actively manage the electrical potential of the resin case.
3Stability of the object's composition
If a conductive member is added to connect the resin case to the vehicle body, then electrolyte stratification is prevented, but the device complexity increases
Solution Approach 1:
The conductive member serves multiple functions simultaneously: (1) it provides an electrical conduction path to prevent charge accumulation on the resin case, (2) it acts as a structural support element for the battery assembly, and (3) it facilitates thermal management by providing a heat dissipation path. This multi-functionality reduces the need for additional separate components.
Solution Approach 2:
The electrical conduction function is merged with existing structural components of the battery system. The conductive member is integrated into the battery mounting structure or terminal connection system, combining electrical functionality with mechanical support functions that already exist in the battery design.
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 configuration effectively neutralizes positive charges on the resin case, facilitating electrolyte stirring and preventing battery degradation, thus maintaining the original performance of the auxiliary battery.
Implementation Method 1
The static eliminator sheet is made of a material on a positive side of a triboelectric series with respect to a material of the resin case, and the holding member holds the static eliminator sheet and the resin case in contact with each other and holds the battery in a state where the resin case and the static eliminator sheet are slidable due to vibrations of the vehicle body
Data Source
AI summary
A vehicle is positively charged with static electricity due to an external factor. The vehicle includes a battery, a static eliminator sheet, and a holding member. The battery includes at least one cell, an electrolyte, a resin case, and negative and positive terminals. The resin case accommodates the components and electrolyte of each cell. The negative terminal is grounded to the vehicle body. The positive terminal is supplied with electric power from a charger. The static eliminator sheet is made of a material on a positive side of a triboelectric series with respect to a material of the resin case. The holding member holds the static eliminator sheet and the resin case in contact with each other. The holding member holds the battery at a predetermined location of the vehicle body in a state where the resin case and the static eliminator sheet are slidable due to vehicle body vibrations.