Variable Pressure Optimization for Planar Pouch Battery Cells
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Solution Overview
Problem
Conventional planar pouch battery compression systems apply uneven pressure, leading to suboptimal performance due to variations in pressure distribution across the surface of battery cells, which can result in inconsistent electrical characteristics such as internal resistance.
Innovation Solution
A variable planar pouch battery pressure optimization system that uses a plurality of individually controllable pressure application components to apply customizable pressure patterns, measured and optimized using electrical characteristic sensors to determine the most effective pressure distribution for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If rigid plates with screws are used to compress battery cells, then the structure is simple and easy to manufacture, but the pressure distribution across the battery cell surface becomes uneven
Solution Approach 1:
The patent divides the compression system into multiple independent pressure application components (fingers) that can be individually controlled. Each finger applies pressure to a specific region of the battery cell, allowing independent adjustment of pressure at different locations to achieve uniform pressure distribution across the entire cell surface.
Solution Approach 2:
The patent transitions from a static rigid plate structure to a dynamic system with independently controllable pressure application components. The fingers can move and adjust their position and applied force dynamically, enabling real-time optimization of pressure distribution based on battery cell characteristics and requirements.
2Device complexity
If uniform pressure is applied across the entire battery cell surface, then the structure is simple, but optimal battery performance cannot be achieved
Solution Approach 1:
The patent implements local quality by allowing different regions of the battery cell to receive different amounts of pressure. Each pressure application component can be independently controlled to apply the optimal pressure for its specific location, considering local variations in battery cell structure and performance requirements, thereby achieving overall optimal battery performance.
Solution Approach 2:
The patent enables independent adjustment of pressure parameters (force, position) for each pressure application component. This allows optimization of pressure distribution patterns to achieve desired battery performance characteristics while managing system complexity through controlled parameter variation.
3Reliability
If pressure is applied to increase surface area contact between layers, then internal resistance decreases, but pressure distribution becomes uneven
Solution Approach 1:
The patent uses multiple segmented pressure application fingers instead of a single rigid plate. This segmentation allows each finger to independently apply pressure to ensure adequate contact between layers in its specific region, collectively achieving uniform pressure distribution across the entire battery cell surface while maintaining low internal resistance.
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
The system achieves optimized electrical characteristics, such as reduced DC resistance, by applying tailored pressure patterns that can be consistently replicated across multiple battery cells, enhancing the performance and efficiency of planar pouch battery cells.
Implementation Method 1
pressure being applied to the battery cell when in use... to press layers of the battery cell against each other... increase the amount of surface area contact between various layers
Data Source
AI summary
Various variable planar pouch battery pressure optimization systems are presented. The system may include a first and second plate, between which a planar pouch battery cell is installed. Multiple pressure application components may be individually controlled to apply varying pressure to the first and second plate. Various pressure patterns may be tested in order to determine a pressure pattern that optimizes at least one electrical characteristic of the planar pouch battery cell.