Vented Battery Cover for Electrolyte Retention
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Solution Overview
Problem
Lead-acid electric storage batteries face performance degradation and shortened life due to electrolyte loss when gases produced during operation entrain and carry electrolyte out of the battery, necessitating a solution that balances gas ventilation with electrolyte retention.
Innovation Solution
A novel vented battery cover with a lid containing a depending chamber and perforated floor collects and returns escaping electrolyte, utilizing a design with increased surface area to condense and redirect entrained electrolyte back into the battery, while allowing gas ventilation to prevent explosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the battery is completely sealed to prevent electrolyte loss, then electrolyte retention is improved, but gas pressure buildup causes explosion risk
Solution Approach 1:
The vented filter cap is divided into multiple functional zones: an upper filter section with porous material for electrolyte retention, a lower vent section for gas discharge, and intermediate baffles to separate liquid and gas flow paths. This segmentation allows simultaneous electrolyte retention and safe gas venting without mixing the two functions in a single undifferentiated structure.
Solution Approach 2:
The porous filter material acts as an intermediary between the electrolyte and the venting system. It allows gas molecules to pass through while blocking liquid electrolyte droplets, serving as a selective mediator that enables gas escape while preventing electrolyte loss. The baffle structure also serves as an intermediary to redirect gas flow away from direct electrolyte contact points.
2Loss of substance
If a filter cap with small holes and balls is used to separate electrolyte, then some electrolyte retention is achieved, but the efficiency is insufficient under heavy gas load
Solution Approach 1:
The invention employs porous filter material with controlled pore sizes in the upper section of the vented cap. This porous structure provides extensive surface area for electrolyte condensation and retention while maintaining adequate gas permeability. The porous architecture allows efficient separation even under heavy gas production conditions without requiring overly restrictive small holes that would bottleneck gas flow.
Solution Approach 2:
The filter cap design transitions from simple point-based hole filtering to a distributed planar porous surface for electrolyte retention. By expanding the filtering function across a two-dimensional porous surface rather than relying on discrete small holes, the system achieves higher filtering efficiency and capacity to handle heavy gas loads without sacrificing gas venting capability.
3Object-affected harmful factors
If the battery is vented to accommodate gas pressure, then explosion risk is reduced, but electrolyte escapes with the gases
Solution Approach 1:
Different regions of the vented cap are assigned different functional properties: the upper section contains porous material optimized for liquid retention, while the lower section provides open pathways for gas discharge. The baffle structures create localized zones that redirect gas flow. This local differentiation of qualities within the single cap structure enables simultaneous achievement of safe venting and electrolyte retention.
Solution Approach 2:
The vented cap design incorporates preliminary condensation surfaces and baffle structures that cause electrolyte droplets to coalesce and return to the battery before the gas-vapor mixture reaches the external environment. This preliminary action of condensing and redirecting electrolyte occurs within the cap structure itself, preventing electrolyte loss before venting takes place.
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 minimizes electrolyte loss, extending the operational life of storage batteries by efficiently recycling the electrolyte and maintaining proper ventilation to prevent explosion.
Implementation Method 1
the lid containing a depending chamber having a perforated floor defining a zone communicating with the interior of the jar wherein electrolyte escaping from the jar may be collected and returned to the jar
Data Source
AI summary
An improved battery construction for increasing the life of a storage battery is disclosed, the storage battery including a lid addition integral with the battery case or jar which condenses escaping dielectric fluid and causes the condensed liquid to return to the main supply of dielectric fluid.