Battery Cell Heat Conduction Layout for Thermal Runaway Containment
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Solution Overview
Problem
Existing batteries face issues with thermal diffusion during thermal runaway, leading to safety accidents and reduced service life due to rapid heat transfer between adjacent cells.
Innovation Solution
A battery design incorporating a heat conducting member that connects the second side walls of battery cells to the box body, facilitating direct heat transfer to the box body and preventing excessive heat transfer to adjacent cells, combined with staggered cell arrangements and heat insulating layers to reduce thermal diffusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If battery cells are arranged closely in the box body to increase energy density, then productivity and space utilization are improved, but thermal diffusion risk increases when thermal runaway occurs
Solution Approach 1:
A heat conducting member is introduced as an intermediary between the battery cells and the box body. This member conducts heat away from the battery cells to the box body, serving as a thermal mediator that prevents direct heat transfer between adjacent cells while maintaining close packing for high energy density
Solution Approach 2:
The heat conducting member is extracted from the traditional battery structure and positioned between the cells and box body. This separate component specifically addresses thermal management without interfering with the close arrangement of battery cells, allowing energy density to be maintained while thermal diffusion is prevented
2Reliability
If heat conducting member is added to prevent thermal diffusion, then safety is improved, but device complexity increases
Solution Approach 1:
The box body serves multiple functions: it provides structural containment for the battery cells and simultaneously acts as a heat sink through the heat conducting member. This multi-functionality reduces the need for additional dedicated cooling structures, thereby limiting the increase in device complexity while improving safety
Solution Approach 2:
The heat conducting member merges the thermal management function with the existing box body structure. Instead of adding a separate complex cooling system, the solution integrates heat conduction into the existing structural component, minimizing additional complexity while achieving improved safety
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
The design effectively prevents thermal diffusion, enhancing safety and extending the service life of the battery by ensuring timely heat dissipation and structural stability.
Implementation Method 1
The second side walls of at least part of the battery cells are connected to the box body in a heat conducting manner through the heat conducting member
Data Source
AI summary
A battery includes a box body, and multiple battery cells and a heat conducting member arranged in the box body. Each battery cell is provided with multiple side walls. The multiple side walls include a first side wall and a second side wall connected to each other. The first side wall is a side wall with the largest area of the battery cell. The second side walls of at least part of the battery cells are connected to the box body in a heat conducting manner through the heat conducting member.