Battery Charge Indicator with Gas Bubble Diversion
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Solution Overview
Problem
Conventional charge indicators for batteries with liquid electrolytes often fail to accurately indicate the state of charge due to gas bubbles getting caught at the tip of the inspection rod, leading to erroneous readings.
Innovation Solution
A charge indicator design featuring a ball cage with a gas bubble collection channel and diversion areas that extend from the tip to the upper boundary wall, allowing gas bubbles to be removed and preventing their adhesion, thereby ensuring accurate state-of-charge indication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional charge indicator design is used, then the structure is simple, but gas bubbles get caught at the tip of the inspection rod causing erroneous readings
Solution Approach 1:
The ball cage is segmented into functional zones: a ball guidance channel for ball movement, a gas bubble collection channel for bubble accumulation, and gas diversion areas for bubble removal. This segmentation allows each zone to perform its specific function, preventing gas bubbles from interfering with the ball's movement and ensuring accurate charge indication.
Solution Approach 2:
The gas bubble collection channel acts as an intermediary structure between the ball guidance channel and the exterior. It captures gas bubbles that would otherwise interfere with the ball's movement and provides a designated path for bubble removal through gas diversion areas, thereby protecting the measurement function.
2Measurement precision
If the ball guidance channel extends to the tip, then the indication is clear, but gas bubbles accumulate at the tip preventing accurate reading
Solution Approach 1:
The gas bubble collection channel converts the harmful effect of gas bubbles (which would interfere with ball movement and cause erroneous readings) into a beneficial function by providing a dedicated collection and removal path. Gas bubbles are diverted away from the critical measurement area, transforming a potential source of error into a controlled feature that protects measurement accuracy.
Solution Approach 2:
The gas bubble collection channel is positioned to intercept gas bubbles before they can reach the tip area where the ball needs to move freely for accurate indication. By providing preliminary action in the form of a collection channel, the design prevents bubbles from interfering with the measurement function.
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 design effectively prevents gas bubbles from interfering with the ball's movement, providing a reliable and accurate indication of the battery's state of charge by ensuring the tip area remains flooded with electrolyte and reducing erroneous readings.
Implementation Method 1
the specific weight of the electrolyte changes in dependence on the state of charge. In the ball guidance channel, at least one ball having a specific weight is guided which matches the specific weight of the electrolyte at a predetermined state of charge. With a correct charge of the battery, the ball is lighter than the electrolyte and floats up in the oblique ball guidance channel.
Implementation Method 2
When the filling level of the electrolyte is adequate and the material of the inspection rod is selected in such a manner that the coefficients of refraction of the inspection rod and of the electrolyte are approximately equal, no further total reflection is produced. When the filling level of the electrolyte is adequate and the material of the inspection rod is selected in such a manner that the coefficients of refraction of the inspection rod and of the electrolyte are approximately equal, no further total reflection is produced. There is thus an optical connection via the tip of the inspection rod to the dark inner space of the accumulator so that a dark area appears at the observation area.
Data Source
AI summary
A charge indicator for a battery includes a transparent inspection rod comprising an observation area at a first end and a tip formed by a conical reflection area at a second end. The charge indicator also includes a ball cage that includes a gas bubble collection channel beginning between the first upper channel boundary wall of the ball guidance channel and the tip, the gas bubble collection channel extending from the lower area of the ball cage to the tip and extending obliquely toward the top to the upper boundary wall oppositely to the adjoining ball guidance channel at least from the tip. The gas bubble collection channel has in an upper area of the gas bubble collection channel a plurality of gas diversion areas running to the outsides of the ball cage in the direction of the upper area of the ball cage, starting from a central plane level with the tip.