Lead-Acid Battery Ribbed Bottom Structure for Short-Circuit Prevention
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Solution Overview
Problem
Lead-acid batteries used in transversely placed states are prone to short circuits due to active material accumulation on the container bottom, which can electrically connect positive and negative electrode plates.
Innovation Solution
A lead-acid battery design featuring ribs on the container bottom that divide the active material accumulation area into multiple regions, preventing the material from gathering at one place and reducing the risk of short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the lead-acid battery is used in a transversely placed state, then the battery can be installed in various orientations, but active material accumulates on the bottom face and causes short circuits between positive and negative electrode plates
Solution Approach 1:
The bottom face of the container is segmented into multiple regions by forming ribs that extend from the end of the specific region. These ribs divide the accumulation area into a first accumulation area and a second accumulation area, preventing active material from concentrating in one location and causing short circuits between electrode plates.
2Quantity of substance
If active material accumulates on the bottom face of the container, then the material collects at one place, but this causes electrical connection between positive and negative electrode feet leading to short circuits
Solution Approach 1:
The bottom face accumulation area is divided into multiple segments using ribs. The first rib extends from the end of the specific region and divides it into a first accumulation area and a second accumulation area. This segmentation ensures active material distributes across multiple regions rather than concentrating at one location, maintaining electrical isolation between positive and negative electrode feet.
3Device complexity
If the bottom face of the container is flat, then the structure is simple, but stress concentrates at one location causing potential damage
Solution Approach 1:
The bottom face structure is segmented by forming ribs that extend from the end of the specific region and divide the accumulation area. This segmentation distributes mechanical stress across multiple regions and structural elements, preventing stress concentration at a single location while maintaining overall structural integrity.
Solution Approach 2:
The bottom face is designed with different local structures: ribs are formed in the specific region to divide the accumulation area, while other regions maintain their original structure. This local quality modification optimizes stress distribution in critical areas without unnecessarily complicating the entire bottom face structure.
Data Source
AI summary
A lead-acid battery includes: a housing that includes a container including one open end and a lid closing the opening of the container; and an element that includes a plurality of positive electrode plates and a plurality of negative electrode plates alternately arranged in the container with a separator interposed therebetween. Each positive electrode plate includes a first foot protruding toward a bottom face of the container, and each negative electrode plate includes a second foot protruding toward the bottom face of the container. The first foot and the second foot are disposed at positions different from each other when viewed from the arrangement direction of the elements. A rib, which extends from an end of a specific region sandwiched between a row including a plurality of the first feet protruding from the element and a row including a plurality of the second feet protruding from the element and divides at least a part of the specific region into a plurality of regions, is formed on the bottom face of the container when viewed from a direction perpendicular to the bottom face.