Multi-Layer Ceramic Battery Current Collector Layout for Fast Charging
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Solution Overview
Problem
Multi-layer ceramic batteries face performance degradation due to fast charge or discharge and current imbalance, primarily caused by current concentration in specific regions during charging and discharging.
Innovation Solution
The implementation of a multi-layer ceramic battery design with an all-solid electrolyte and multiple outer current collector layers on at least three side surfaces, which expands the current collection area and prevents current density increase in specific areas, thereby stabilizing the battery and enabling high-speed charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If current collection is concentrated in specific regions to simplify the battery structure, then manufacturing complexity is reduced, but current density increases in those specific areas causing performance degradation
Solution Approach 1:
The current collector is divided into multiple separate layers instead of using a single continuous structure. These multiple current collector layers are distributed across different regions of the battery, segmenting the current collection function to prevent concentration in specific areas and thereby improving current distribution uniformity while maintaining structural simplicity
Solution Approach 2:
The patent transitions from a two-dimensional current collection approach to a three-dimensional arrangement by stacking multiple current collector layers at different positions and orientations. This dimensional expansion allows current to be collected from multiple spatial dimensions, distributing current density more evenly throughout the battery structure
2Productivity
If charging and discharging speed is increased to improve productivity, then charging efficiency is improved, but current concentration occurs causing performance degradation
Solution Approach 1:
By segmenting the current collection into multiple layers, the patent enables higher charging speeds to be achieved without current concentration. Each layer handles a portion of the total current, allowing the system to accept higher overall current loads while maintaining uniform current density distribution across all layers, thus improving charging speed without sacrificing stability
Solution Approach 2:
Different regions of the battery are equipped with different numbers and configurations of current collector layers based on local current density requirements. Areas prone to higher current concentration receive additional current collector layers, creating non-uniform local quality that balances current distribution across the entire battery structure during high-speed charging
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 design enhances the stability of the battery by minimizing degradation caused by current concentration and allows for efficient high-speed charging by ensuring uniform current distribution across the expanded current collector area.
Implementation Method 1
an all-solid electrolyte layer disposed between the first electrode layer and the second electrode layer
Implementation Method 2
a plurality of outer current collector layers disposed on a side surface of the peripheral region
Data Source
AI summary
A multi-layer ceramic battery including a main region in which charging and discharging is performed, a peripheral region positioned around the main region, and a plurality of outer current collector layers disposed on a side surface of the peripheral region, wherein each outer current collector layer of the plurality of outer current collector layers is spaced apart from one other, wherein the peripheral region includes a stack, which includes at least three side surfaces, is in contact with the outer current collector layers, and is connected to the main region, and the plurality of outer current collector layers is disposed on the at least three side surfaces.