Semi-Solid Battery Module Manufacturing Without Binder Coatings
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Solution Overview
Problem
Conventional battery manufacturing processes are complex, costly, and prone to yield losses, with a need for increased areal charge capacity and electrical conduction in electrodes, particularly in high-power batteries, while avoiding the use of binder agents to address rheological challenges and particle segregation.
Innovation Solution
The use of semi-solid suspensions in electrochemical cells, where anode and cathode materials are suspended in an electrolyte without binders, allowing for direct transfer to current collectors and separators, enabling simplified manufacturing and increased charge capacity without the need for casting, and enhancing ionic conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional battery manufacturing processes are used, then electrodes can be produced with standard properties, but the process becomes complex, costly, and prone to yield losses
Solution Approach 1:
The patent removes binder agents from the electrode formulation, extracting the problematic component that causes rheological challenges and particle segregation. This extraction simplifies the manufacturing process by eliminating coating and compression steps while maintaining electrode integrity through the semi-solid suspension's self-supporting properties
Solution Approach 2:
The patent changes the physical state parameter of the electrode material from a dry powder mixture to a semi-solid suspension with specific viscosity characteristics. This parameter change enables the suspension to flow into the battery assembly and self-support without requiring high-pressure compression or binder agents, thereby simplifying the manufacturing process
2Stability of the object's composition
If binder agents are used in electrode mixtures, then electrode structural integrity is maintained, but rheological challenges and particle segregation occur
Solution Approach 1:
The patent extracts binder agents from the electrode formulation entirely, replacing them with a carefully engineered semi-solid suspension system. The suspension's viscosity and compositional stability provide structural integrity without introducing organic binders that cause particle segregation and rheological problems during manufacturing
Solution Approach 2:
The patent achieves homogeneous distribution of active materials, conductive additives, and electrolyte components throughout the semi-solid suspension. This homogeneity prevents particle segregation during injection and settling, maintaining consistent electrode composition and structural integrity without requiring binder agents
3Quantity of substance
If electrode thickness is increased to enhance charge capacity, then areal charge capacity improves, but manufacturing complexity and cost increase
Solution Approach 1:
The patent uses hydraulic injection to deliver the semi-solid electrode suspension into the battery assembly. This hydraulic delivery system enables precise control of electrode thickness and shape while simplifying manufacturing, as the suspension flows under pressure to fill the designated space without requiring complex coating or compression equipment
Solution Approach 2:
The patent employs a dynamic manufacturing process where the semi-solid suspension is injected and then allowed to self-settle and self-support. This dynamic approach replaces static, multi-step processes (coating, drying, compression) with a single injection step followed by natural settling, reducing manufacturing complexity while achieving desired electrode thickness for enhanced charge capacity
4Manufacturing precision
If conventional coating and compression processes are used, then electrode density and thickness control are achieved, but equipment costs and operating expenses increase
Solution Approach 1:
The patent extracts the coating and compression steps from the manufacturing process entirely. Instead of using complex coating equipment to apply slurry and subsequent high-pressure compression to densify the electrode, the invention uses simple injection of a semi-solid suspension that self-densifies and self-supports, dramatically reducing equipment costs while maintaining manufacturing precision
Solution Approach 2:
The semi-solid suspension performs multiple functions self-service: it flows under its own viscosity characteristics to fill the electrode space, self-supports without external compression, and maintains structural integrity without binder agents. This self-service behavior eliminates the need for expensive coating and compression equipment while achieving precise electrode thickness and density control
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
This approach simplifies the manufacturing process, reduces equipment costs, allows for varied electrode thickness and shape, increases charge capacity, and enhances ionic conductivity, leading to more efficient and cost-effective battery production with improved performance.
Implementation Method 1
The use of semi-solid suspensions in electrochemical cells, where anode and cathode materials are suspended in an electrolyte without binders, allowing for direct transfer to current collectors and separators
Implementation Method 2
an anode compartment defined at least in part by an anode current collector and a separator spaced apart from the anode collector... and a cathode compartment defined at least in part by a cathode current collector and the separator spaced apart from the cathode current collector
Implementation Method 3
The use of semi-solid suspensions in electrochemical cells, where anode and cathode materials are suspended in an electrolyte without binders... enhancing ionic conductivity
Data Source
AI summary
A method of manufacturing an electrochemical cell includes transferring an anode semi-solid suspension to an anode compartment defined at least in part by an anode current collector and an separator spaced apart from the anode collector. The method also includes transferring a cathode semi-solid suspension to a cathode compartment defined at least in part by a cathode current collector and the separator spaced apart from the cathode collector. The transferring of the anode semi-solid suspension to the anode compartment and the cathode semi-solid to the cathode compartment is such that a difference between a minimum distance and a maximum distance between the anode current collector and the separator is maintained within a predetermined tolerance. The method includes sealing the anode compartment and the cathode compartment.