Battery Pack Cell Placement for Thermal Uniformity and Reliability
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Solution Overview
Problem
Existing battery pack configurations in computer systems fail to optimize battery performance and operational period due to non-uniform temperature distribution and varying battery cell efficiencies, leading to reduced reliability and capacity.
Innovation Solution
A method is introduced to configure battery packs by determining optimal battery cell types for each position in a linear cell string, using integer linear programming to assign cell types based on computed parameters like temperature and efficiency, and employing a high thermal conductivity metal mesh structure for cooling to maintain uniform surface temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If battery cells are arranged in a conventional uniform configuration, then the manufacturing process is simple, but the battery performance and operational period are reduced due to non-uniform temperature distribution and varying cell efficiencies
Solution Approach 1:
The patent applies local quality by assigning different battery cell types to different positions within the battery pack based on local temperature conditions. The system calculates optimal cell configurations where high-capacity cells are placed in cooler regions and lower-capacity cells are placed in warmer regions, thereby optimizing overall battery performance and reliability while accounting for spatial variations in thermal environment
Solution Approach 2:
The patent implements preliminary action by pre-calculating the optimal battery cell configuration before manufacturing or assembly. The system uses integer linear programming to determine the best arrangement of different cell types in advance, considering thermal characteristics and capacity requirements, which guides the subsequent manufacturing and assembly processes
2Duration of action of moving object
If higher capacity battery cells are used throughout the pack, then the operational period is extended, but the temperature uniformity and overall efficiency deteriorate due to excessive heat generation
Solution Approach 1:
The patent applies local quality by strategically placing high-capacity battery cells only in positions where thermal conditions allow, such as cooler regions of the battery pack. Lower-capacity cells are placed in regions prone to higher temperatures, thereby maintaining temperature uniformity across the pack while still achieving extended operational period through the inclusion of high-capacity cells in appropriate locations
Solution Approach 2:
The patent implements parameter changes by varying the capacity parameter of battery cells based on their position within the pack. Instead of using a uniform cell type, the system adjusts the capacity parameter of individual cells or cell groups according to local thermal conditions, thereby optimizing both operational duration and temperature distribution
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 enhances battery pack reliability and extends the functional operational period by optimizing cell placement and temperature uniformity, thereby improving overall battery performance and capacity.
Implementation Method 1
employing a high thermal conductivity metal mesh structure for cooling to maintain uniform surface temperatures
Data Source
AI summary
Embodiments of the present disclosure provide systems and methods for configuring battery packs, such as used in computer systems. The disclosed systems and methods provide an optimal battery configuration of battery cell types in the battery pack, improving battery performance and a functional operational period for the battery pack. The disclosed systems and methods select an optimal battery type for each position of the battery cells in a linear battery cell string of the battery pack.