Solid State Battery Cell Housing Current Collector Design
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Solution Overview
Problem
Solid state battery cells face challenges with electrical connectivity, ionic conductivity, flexibility, and complex assembly processes, leading to reduced capacity and increased manufacturing costs.
Innovation Solution
The design includes a housing acting as a current collector, a membrane separating anode and cathode slurries to ensure ionic connection while maintaining electrical isolation, and conductive pins for efficient current collection, along with encapsulating particles with conductive additives to enhance connectivity and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a membrane is used to separate anode and cathode materials, then electrical isolation is achieved, but ionic conductivity may be reduced
Solution Approach 1:
The membrane is designed with spatially varying properties: it provides electrical isolation (insulating) while maintaining ionic conductivity through selective pore structure and material composition. Different regions of the membrane have optimized properties for their specific functions - electrical blocking while allowing ion transport.
Solution Approach 2:
The membrane acts as an intermediary component between the anode and cathode, mediating the interaction by providing electrical isolation while facilitating ionic connection. It serves as a bridge that allows ion transport while preventing electron flow, resolving the contradiction between isolation and connectivity.
2Object-generated harmful factors
If solid state electrolyte particles are used to encapsulate particles, then ionic conductivity is improved, but manufacturing complexity increases
Solution Approach 1:
The solid state electrolyte particles are pre-formed and prepared in advance before being integrated with the active material particles. This preliminary preparation allows for controlled encapsulation and simplifies the subsequent mixing and assembly processes, reducing overall manufacturing complexity.
Solution Approach 2:
The invention uses composite structures where solid state electrolyte particles encapsulate active material particles, creating core-shell composite spheres. This composite approach improves ionic conductivity while the standardized particle morphology simplifies manufacturing compared to alternative complex structures.
3Reliability
If complex assembly processes are used to ensure proper connectivity, then electrical and ionic conductivity are improved, but manufacturing time and cost increase
Solution Approach 1:
The invention merges multiple functions into integrated components: the membrane provides both electrical isolation and ionic conduction, the solid state electrolyte particles provide both encapsulation and ionic conductivity, and the conductive additive network provides both electrical connectivity and structural integrity. This functional integration reduces the number of separate assembly steps required.
Solution Approach 2:
The invention changes material parameters to achieve desired properties: using solid state electrolytes with high ionic conductivity, optimizing conductive additive content and distribution, and adjusting particle size and morphology. These parameter optimizations allow for simpler assembly processes while maintaining high conductivity performance.
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 configuration improves electrical and ionic conductivity, increases battery capacity, and simplifies the assembly process, resulting in more efficient and cost-effective solid state battery cells.
Implementation Method 1
The membrane can electrically isolate (or insulate) the solid state anode material from the solid state cathode material
Implementation Method 2
The membrane can electrically isolate (or insulate) the solid state anode material from the solid state cathode material, but ionically connect the solid state anode material and the solid state cathode material
Implementation Method 3
The solid state anode material can include solid state anode particles, first solid state electrolyte particles and a first conductive additive
Data Source
AI summary
A solid state battery cell can include a first polarity terminal, a second polarity terminal and a housing defining a cavity and functioning as a current collector for the first polarity terminal. The battery cell can include a membrane disposed in the cavity and dividing the cavity into a first portion and a second portion, an electrically conductive pin functioning as a current collector for the second polarity terminal, and an insulator electrically isolating the electrically conductive pin from the housing. A solid state anode material, including solid state anode particles, first solid state electrolyte particles and a first conductive additive, can be disposed in the first portion of the cavity. A solid state cathode material, including solid state cathode particles, second solid state electrolyte particles and a second conductive additive, can be disposed in the second portion of the cavity.