Succinate Spreader for Lead-Acid Battery Electrodes
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Solution Overview
Problem
Existing spreaders for lead-acid battery electrodes, particularly lignin-based organic materials, exhibit unpredictable properties due to varying functional groups, leading to inconsistent performance, reduced service life, and inefficiencies in cold start capabilities and charge acceptance.
Innovation Solution
A synthetic spreader comprising succinates or succinic acid derivatives, such as iminosuccinic acid, is used to stabilize the active electrode mass, providing a consistent chemical composition and improved thermal stability, exemplified by tetrasodium iminodisuccinate, which can be used alone or mixed with other dispersants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If lignin-based organic spreaders are used, then the spreader is inexpensive and widely available, but the properties vary unpredictably due to varying functional groups
Solution Approach 1:
The patent changes the chemical parameters of the spreader by replacing natural lignin-based materials with synthetic succinate derivatives. This substitution maintains the spreading function while achieving consistent chemical composition and predictable electrochemical properties, directly resolving the contradiction between availability and compositional stability
Solution Approach 2:
The patent uses composite material approach by combining succinate derivatives with other compatible substances to create a spreader composition that maintains both cost-effectiveness and chemical consistency. The composite formulation allows optimization of both economic and performance parameters
2Ease of manufacture
If lignin-based spreaders are used, then the production cost is low, but the service life and cycle stability are reduced
Solution Approach 1:
The patent changes the chemical structure parameter from lignin-based organic compounds to succinate derivatives, which provides better thermal stability and electrochemical performance. This parameter change maintains production cost effectiveness while significantly improving service life and cycle stability
Solution Approach 2:
The patent avoids the disposable nature of lignin-based spreaders by introducing succinate derivatives that provide long-term stability and durability. The new material maintains the economic advantage of low cost while eliminating the short service life problem
3Ease of manufacture
If natural raw material spreaders are used, then the material is readily available, but the electrochemical properties are inconsistent
Solution Approach 1:
The patent changes the chemical composition parameters by using synthetic succinate derivatives with defined molecular structures. This ensures consistent electrochemical properties such as cold start voltage, current consumption, and charge acceptance, while maintaining material availability through synthetic production
Solution Approach 2:
The patent creates a synthetic copy of the spreading function that replicates the beneficial effects of natural lignin-based spreaders while eliminating their inconsistencies. The succinate derivatives copy the essential spreading mechanism with improved predictability and precision
Data Source
AI summary
The invention relates to performance improvements in lead accumulators and lead-acid batteries by admixing so-called expanders or spreading materials to the active negative materials. Succinates are proposed as a new synthetic and consequently chemically clearly defined spreading means that can be used in place of lignin sulphonates, particularly iminodisuccinates or succinyl groups or oligomers containing iminosuccinyl groups or polymer compounds, individually or in any mixtures.