Fiber Battery Components for Lead-Acid Adhesion and Stability
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Solution Overview
Problem
Existing battery components used as pasting paper and capacitance layers in lead acid batteries face challenges such as instability in reactive environments, adverse interactions with electrolytes and electrodes, and poor adhesion, leading to reduced performance and cycle life.
Innovation Solution
A battery component comprising a mixture of fine glass fibers, coarse glass fibers, fibrillated fibers, and a resin, with a carbon content that includes activated and conductive carbon, providing enhanced mechanical strength, adhesion, and resistance to acid stratification while maintaining conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional battery components are used as pasting paper and capacitance layers, then the battery can function, but the components degrade, leach harmful components, and show poor adhesion in the strongly reactive battery environment
Solution Approach 1:
The patent uses a composite material consisting of glass fibers (both fine and coarse), fibrillated fibers, and resin to create a pasting paper that is chemically stable in the battery environment. This composite structure prevents degradation and leaching of harmful components while maintaining mechanical integrity and adhesion properties.
2Strength
If the battery component uses sufficient resin to improve adhesion, then adhesion improves, but the air permeability decreases
Solution Approach 1:
The patent applies resin locally to specific areas of the glass fiber mat rather than uniformly saturating the entire structure. This localized application provides sufficient adhesion in critical areas while maintaining air permeability in other regions, resolving the contradiction between adhesion strength and breathability.
3Strength
If fine glass fibers are used to improve surface area and adhesion, then adhesion improves, but the mechanical strength and processability decrease
Solution Approach 1:
The patent combines fine glass fibers (for adhesion), coarse glass fibers (for mechanical strength and processability), and fibrillated fibers (for bulk structure) into a single composite mat. This merging of different fiber types allows the component to simultaneously achieve good adhesion, mechanical strength, and ease of manufacturing.
Data Source
AI summary
Battery components are generally provided. In some embodiments, the battery components can be used as pasting paper and/or capacitance layers for batteries, such as lead acid batteries. The battery components described herein may comprise a plurality of fibers. The battery component may include, in some embodiments, a plurality of fibers and, optionally, one or more additives such as conductive carbon and/or activated carbon. In certain embodiments, the plurality of fibers include relatively coarse glass fibers (e.g., having an average diameter of greater than or equal to 2 microns), relatively fine glass fibers (e.g., having an average diameter of less than 2 microns), and/or fibrillated fibers. In some instances, such fibers may be present in amounts such that the battery component has a particular surface area, mean pore size, and/or dry tensile strength.