Lead-Acid Battery Grid Rib Layout for Vertex Deformation Control
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Solution Overview
Problem
Lead-acid battery grids experience deformation of vertices due to oxidative corrosion, leading to peeling of active material and reduced strength, as the grid ribs corrode and extend, causing uneven pressure distribution on the frame ribs.
Innovation Solution
A lead-acid battery grid design with a quadrangular frame and specific configurations of inner ribs that manage the distribution of pressing forces to prevent vertex deformation, including a relational expression (M1/L1 > Q1/P1) to ensure balanced force transmission and reduce distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the lead-acid battery is used for a long period of time, then the battery operates continuously, but the grid rib corrodes and extends causing vertex deformation
Solution Approach 1:
The patent applies different structural configurations to different regions of the grid. Specifically, the first inner ribs are configured to extend over at least three second inner ribs, creating localized reinforcement zones. This non-uniform distribution of rib structures addresses the corrosion issue locally at critical vertices while maintaining overall grid functionality throughout extended battery operation.
Solution Approach 2:
The grid is divided into multiple segments with different rib configurations. The first inner ribs are segmented to extend across multiple second inner ribs, creating discrete reinforcement sections. This segmentation allows different parts of the grid to handle corrosion and expansion differently, preventing uniform structural failure over time.
2Object-generated harmful factors
If the inner rib corrodes and extends, then the corrosion process continues, but the vertex deforms causing active material to peel off
Solution Approach 1:
The patent implements preliminary anti-action by configuring the first inner ribs to extend over at least three second inner ribs before corrosion can cause significant vertex deformation. This pre-configured structural arrangement counteracts the harmful effects of corrosion by distributing stresses and preventing the concentration of forces that would lead to vertex deformation and active material peeling.
Solution Approach 2:
The first inner ribs are merged with multiple second inner ribs by extending over them, creating a combined structural element. This merging distributes the mechanical loads and corrosion effects across multiple ribs rather than concentrating them at single vertices, thereby maintaining grid strength even as corrosion progresses.
3Shape
If the vertex deforms, then the structural change occurs, but the active material peels off reducing battery performance
Solution Approach 1:
The patent applies local quality by concentrating structural reinforcement at vertex regions through the configuration of first inner ribs that extend over multiple second inner ribs. This localized reinforcement specifically addresses vertex stability without affecting other grid regions, preventing active material peeling at critical locations while maintaining overall battery reliability.
4Loss of substance
If the grid rib corrodes, then the material loss occurs, but the inner rib extends causing uneven pressure distribution
Solution Approach 1:
The patent segments the grid structure into multiple rib systems with different functions. The first inner ribs are segmented to extend across multiple second inner ribs, creating discrete pressure distribution zones. This segmentation ensures that even as material is lost to corrosion, the pressure remains distributed evenly across multiple contact points rather than concentrating at single locations.
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 vertex deformation, maintains the integrity of the active material, and enhances the strength and durability of the lead-acid battery grid by optimizing the distribution of inner ribs and their connections.
Implementation Method 1
L1 is the number of first inner ribs extending toward a first vertex-side portion of the first frame rib... the first inner ribs extending over at least three of the second inner ribs... a relational expression shown in (1) below holds: M1/L1 > Q1/P1
Data Source
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AI summary
The following relational expression holds among: the number (L1) of first inner ribs (320) extending toward a first vertex-side portion (A11) between a position of a first vertex (C1) and a position separated therefrom by a first reference length; the number (M1) of first inner ribs (320) connected to both a specific second inner rib (310V) and the first vertex-side portion (A11) of a first frame rib (210L); the number (P1) of second inner ribs (310) extending toward a first vertex-side portion (A21) between the position of the first vertex (C1) and a position separated therefrom by the first reference length; and the number (Q1) of second inner ribs (310) connected to both a specific first inner rib (320V) and the first vertex-side portion (A21) of a second frame rib (220D), (M1/L1) > (Q1/P1)