Battery Vent Plug Backpressure Control for Independent Watering
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Solution Overview
Problem
Existing battery systems, particularly lead acid batteries used in industrial vehicles, face challenges in maintaining optimal fluid levels due to uneven water loss across batteries in an array, leading to inefficiencies and potential damage.
Innovation Solution
A vent plug for an automatic battery watering system that includes a head with a water inlet, a body with an internal volume, and a column with a channel, designed to create backpressure and control water delivery to the battery, avoiding the use of float valves and ensuring consistent fluid levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If float valves are used to control fluid flow into each battery cell, then automatic water replenishment is achieved, but the system becomes prone to error due to vibration allowing excess water to flow past the float mechanism
Solution Approach 1:
The patent removes the float valve component entirely from the system. Instead of using a float valve to control water flow, the invention uses a vent plug with a vent hole that allows air to escape from the battery cell during charging. The vent hole is positioned at a specific height to create backpressure that prevents overcharging, eliminating the reliability issues associated with float valves in vibratory environments.
Solution Approach 2:
The patent replaces the mechanical float valve system with a passive vent hole mechanism. The vent hole creates backpressure through atmospheric pressure differential when the battery fluid level rises, automatically preventing further water flow without any moving mechanical parts that could fail due to vibration.
2Ease of operation
If daisy chain connection is used to control fluid flow through first battery fluid level, then some battery cells are properly replenished, but subsequently connected battery cells continue to lose water due to higher operating temperatures
Solution Approach 1:
The patent applies segmentation by providing each battery cell with its own independent vent plug and vent hole, rather than using a daisy chain connection. This allows each battery cell to be independently monitored and controlled for water replenishment based on its specific fluid level and temperature conditions, ensuring that each cell receives appropriate water levels regardless of its position in the battery array.
3Measurement precision
If technician manually inspects each battery cell for water replenishment, then accurate fluid level control is achieved, but the process is tedious and prone to error
Solution Approach 1:
The patent implements self-service by enabling automatic water replenishment through the vent plug mechanism. During battery charging, the vent hole allows air to escape until the battery fluid reaches the optimal level, at which point backpressure prevents further water flow. This eliminates the need for manual technician inspection while maintaining accurate fluid level control, significantly improving productivity.
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 system effectively maintains optimal fluid levels in each battery independently, preventing overwatering and underwatering, and operates without mechanical failures, ensuring reliable performance in industrial applications.
Implementation Method 1
The internal volume of the body is sealed, other than at the bottom of the extension, the opening through the floor, and the outlet of the channel through the head, in order to create a backpressure in the internal volume when a fluid level of a battery in which the vent plug is disposed covers the opening at the bottom of the extension and the opening through the floor
Data Source
AI summary
An automatic and passive battery fluid maintenance system maintains the fluid levels in a battery system by replenishing water as the water is lost from the battery. A reservoir is used to contain a volume of fluid and is mounted above the batteries. Fluid from the reservoir flows into a distribution manifold through a flow regulator. From the manifold the fluid is distributed to a vent plug at each battery. The vent plugs are configured to control create a backpressure in the fluid line when the battery fluid level is at an optimum level. As a result of the backpressure, fluid does not flow into the battery through the vent plug. When the fluid in the battery drops below the optimum level, the backpressure is reduced, allowing water to flow until the fluid level of the battery again is at the optimum level.