Offset Battery Cell Layout to Suppress Thermal Diffusion
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Solution Overview
Problem
Thermal runaway in one battery cell can cause significant heat transfer to adjacent cells, leading to thermal diffusion and reduced reliability in battery systems.
Innovation Solution
The battery design includes offsetting the sidewalls of adjacent battery cells to reduce heat transfer and incorporating thermally conductive connections and adhesive layers to enhance heat dissipation and manage thermal diffusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If battery cells are arranged in a compact configuration to maximize space utilization, then the battery's energy density and space efficiency are improved, but heat transfer between adjacent cells increases, leading to higher risk of thermal diffusion
Solution Approach 1:
The patent applies asymmetry by offsetting adjacent battery cells from each other in the second direction, creating an asymmetric arrangement where the largest sidewalls of adjacent cells do not directly face each other. This asymmetric positioning reduces the heat transfer area between cells while maintaining compact overall configuration, thus resolving the contradiction between space utilization and heat transfer reduction.
Solution Approach 2:
The patent introduces a second direction (Y-direction) for offset arrangement in addition to the first direction (X-direction) for cell alignment. This dimensional approach allows cells to be compactly arranged in the X-direction while offset in the Y-direction, reducing face-to-face heat transfer paths without sacrificing overall space utilization.
2Temperature
If thermally conductive connections are added between battery cells to improve heat dissipation, then thermal management efficiency is improved, but the complexity of the battery structure increases
Solution Approach 1:
The patent merges the thermal management function with the existing adhesive structures by using thermally conductive adhesive layers. This combines the structural bonding function with the thermal conduction function into a single component, improving heat dissipation without adding separate thermal management structures and thus avoiding increased complexity.
Solution Approach 2:
The adhesive layers serve multiple functions: structural bonding between cells and thermal conduction for heat dissipation. This multi-functionality allows the same component to address both structural integrity and thermal management needs, improving heat dissipation efficiency without increasing structural complexity.
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 design suppresses thermal diffusion and enhances the reliability of the battery by reducing the probability of thermal runaway in adjacent cells and improving heat transfer efficiency.
Implementation Method 1
a thermally conductive adhesive layer is provided between at least two of the first sidewalls offset from each other
Data Source
AI summary
A battery and an electric apparatus having the same. The battery includes at least two first battery cells, each first battery cell is provided with multiple sidewalls, the multiple sidewalls include a first sidewall, the first sidewall is the sidewall with the largest area of the first battery cell, the first sidewalls of at least two first battery cells are arranged opposite each other in a first direction and arranged offset from each other in a second direction, the first direction and the second direction are perpendicular to each other, and the first direction are perpendicular to the first sidewall.