Battery Pack Support Plates for Uniform Cell Pressure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-capacity high-voltage battery systems in eco-friendly vehicles face challenges with excessive weight, size, and energy inefficiency due to non-uniform surface pressure and temperature differences among cells, leading to reduced durability and increased manufacturing costs.
Innovation Solution
A battery pack structure featuring a cell module assembly with end plates and support plates that alternately dispose terminals and fastening portions for uniform pressure distribution, reducing weight and size by optimizing the pack module structure, and using bus bars for electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the loading capacity of battery cells is increased to increase energy density, then the energy density of the battery system is improved, but the package limit on the vehicle is exceeded, weight increases, and manufacturing cost increases
Solution Approach 1:
The patent changes the structural parameters of the battery pack by introducing support plates and optimizing cell arrangement, allowing for improved energy density without proportionally increasing weight. The support plates provide structural reinforcement that enables higher cell capacity while maintaining overall pack weight efficiency.
2Quantity of substance
If the loading capacity of battery cells is increased to increase energy density, then the energy density of the battery system is improved, but the package limit on the vehicle is exceeded
Solution Approach 1:
The patent optimizes the three-dimensional arrangement of cells and support structures within the battery pack. By carefully designing the spatial configuration and utilizing vertical stacking with support plates, the patent achieves higher energy density while staying within vehicle package constraints.
3Quantity of substance
If the structures of pack modules are simply increased only in size in the cell stacking direction, then the capacity is increased, but excessive temperature differences occur among cells and durability deteriorates
Solution Approach 1:
The patent introduces support plates at specific locations within the battery pack structure. These locally positioned support plates provide targeted structural support and thermal management, ensuring uniform temperature distribution and preventing durability deterioration even as capacity increases through larger pack dimensions.
4Strength
If cells are pressed excessively around the end plate, then structural support is provided, but the durability of specific cells deteriorates
Solution Approach 1:
The support plates are strategically positioned and designed with specific pressing forces to provide structural support without excessive compression on individual cells. This localized structural reinforcement maintains overall pack strength while preserving cell durability.
Data Source
AI summary
A battery pack structure of a vehicle, may include a cell module assembly formed by stacking a plurality of cell modules, end plates coupled to both side end portions of the cell module assembly, and support plates coupled to the top and the bottom of the cell module assembly and both side end portions of the end plates to bring the cell modules in contact with each other.