Prismatic Battery Stack Barrier Layout for Uniform Compression
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Solution Overview
Problem
Existing prismatic battery assemblies face challenges in efficient energy storage and thermal management, particularly in large-scale energy storage systems where thermal runaway and uneven compression can occur.
Innovation Solution
The battery module assembly comprises a first battery stack with two battery cells arranged such that their front and rear surfaces are parallel and coplanar, and a barrier is placed adjacent to the side faces of the battery cells. This configuration allows for efficient energy storage and thermal management by ensuring uniform compression and isolating thermal effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple prismatic battery cells are arranged in a battery assembly, then energy storage capacity is improved, but thermal management becomes more difficult and thermal runaway risk increases
Solution Approach 1:
The patent divides the battery assembly into multiple independent battery stacks, each containing one or more battery cells. These stacks are separated by barriers, creating isolated thermal zones. This segmentation allows the system to store more energy while limiting the propagation of thermal runaway events to adjacent cells, thus resolving the contradiction between increased energy storage capacity and thermal safety.
Solution Approach 2:
The patent introduces barriers as intermediary elements positioned between adjacent battery stacks. These barriers act as thermal isolators, preventing direct thermal contact between battery cells. The barriers maintain electrical connectivity while providing thermal management, enabling higher energy density without proportionally increasing thermal runaway risk.
2Quantity of substance
If battery cells are tightly arranged to maximize space utilization, then energy density is improved, but compression uniformity deteriorates leading to uneven stress distribution
Solution Approach 1:
The patent segments the battery assembly into discrete stacks separated by barriers. This segmentation creates modular units that can be independently compressed and managed. The barriers provide structural definition that helps distribute compression forces more uniformly across the battery cells, preventing stress concentration while maintaining high energy density through tight overall arrangement.
3Object-affected harmful factors
If barriers are added between battery stacks for thermal isolation, then thermal management is improved, but device complexity increases
Solution Approach 1:
The barriers in the patent serve multiple functions simultaneously: they provide thermal isolation between battery stacks, maintain structural integrity of the assembly, enable uniform compression distribution, and facilitate modular assembly. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving effective thermal management.
Data Source
AI summary
A battery module assembly includes a first battery cell and a second battery cell. The first battery cell includes a rear surface, a side surface, and a top surface. A second battery cell also includes a front surface, a side surface, and a top surface. The front surface of the second battery cell contacts the rear surface first battery cell. A barrier contacts the side surfaces of both the first battery cell and the second battery cell.