Offset Battery Cell Layout for Expansion Force Dispersion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The expansion of battery cells during charging and discharging leads to concentrated expansion forces, affecting performance and stability of the battery structure, and existing solutions compromise energy density to mitigate this issue.
Innovation Solution
Offsetting the center lines of the main portions of adjacent battery cells to disperse expansion forces, reducing the concentration of these forces and minimizing reserved expansion space, thereby improving structural stability and energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If battery cells are stacked with aligned center lines, then the structure is simple and easy to manufacture, but the expansion force concentrates and affects battery performance
Solution Approach 1:
The patent applies asymmetry by intentionally offsetting the center lines of adjacent battery cells in the stacked arrangement. Instead of aligning all center lines along the same vertical axis, each successive battery cell is positioned with a horizontal offset, creating an asymmetric distribution pattern that disperses expansion forces throughout the battery structure rather than concentrating them at a single location.
2Reliability
If reserved expansion space is increased between battery cells, then the expansion force concentration is reduced, but the energy density of the battery decreases
Solution Approach 1:
The patent transitions from a one-dimensional vertical stacking arrangement to a two-dimensional distributed arrangement by introducing horizontal offsets between battery cell center lines. This dimensional change allows the battery structure to accommodate expansion forces in multiple spatial directions, effectively dispersing stress without requiring additional vertical clearance or reserved expansion space between cells.
3Quantity of substance
If battery cells are tightly packed to maximize energy density, then space utilization is improved, but the expansion force causes compressional deformation of the battery case
Solution Approach 1:
The patent applies segmentation by dividing the battery cell arrangement into offset groups, where no two adjacent battery cells share the same vertical alignment. This segmentation of the stacking pattern creates multiple discrete expansion zones distributed throughout the battery, preventing the concentration of expansion forces that would otherwise cause localized compressional deformation of the battery case body.
Data Source
AI summary
The present disclosure provides a battery and an electric device. The battery includes a plurality of battery cells. Each of the plurality of battery cells has an electrode assembly. The electrode assembly includes a main portion and a tab. Center lines of main portions of two adjacent battery cells of the plurality of battery cells are offset.