Battery Cell Heat Conduction Structure for Fast-Charging Thermal Control
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Solution Overview
Problem
Fast charging of battery cells in electric vehicles leads to excessive temperature increases, which can cause explosions due to inefficient heat dissipation, reducing the reliability of the battery.
Innovation Solution
A battery cell design incorporating a heat conduction structure between the electrode assembly and a heat exchange case wall, allowing for rapid heat transfer to an external heat exchange structure, enhancing heat dissipation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fast charging is performed on the battery cell, then charging speed is improved, but temperature increase becomes excessive causing safety issues
Solution Approach 1:
The patent introduces a heat conduction structure as an intermediary component between the electrode assembly and the heat exchange case wall. This mediator facilitates efficient heat transfer from the internal electrode assembly to the external heat exchange structure, enabling rapid heat dissipation during fast charging operations without compromising safety
Solution Approach 2:
The patent extracts the heat dissipation function from the overall battery structure by dedicating specific components (heat conduction structure and heat exchange case wall) solely to thermal management. This separation allows the charging system to operate at high speeds while the extracted thermal management system handles heat removal independently
2Object-affected harmful factors
If a heat conduction structure is added to improve heat dissipation, then heat dissipation efficiency is improved, but device complexity increases
Solution Approach 1:
The heat exchange case wall serves multiple functions: it acts as both the structural enclosure for the battery cell and the heat exchange surface for thermal management. By making the case wall multi-functional, the patent avoids adding separate external heat exchange components that would increase structural complexity
Solution Approach 2:
The patent merges the heat conduction structure with existing battery components, integrating thermal management functionality into the overall battery structure rather than adding separate independent systems. This merging approach improves heat dissipation while minimizing increases in device 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
The improved heat dissipation efficiency reduces the risk of explosions, thereby increasing the reliability of the battery.
Implementation Method 1
the heat conduction structure is arranged between the electrode assembly and the heat exchange case wall in the manner of heat conduction
Implementation Method 2
the heat exchange case wall is configured to conduct heat inside the battery cell to a heat exchange structure located outside the case
Data Source
AI summary
The present application relates to a battery cell, a battery, and a power consuming apparatus. The battery cell includes a case, at least one electrode assembly, and a heat conduction structure. The case has a heat exchange case wall, and the heat exchange case wall is configured to conduct heat inside the battery cell to a heat exchange structure located outside the case. The heat conduction structure and all electrode assemblies are accommodated in the case, and the heat conduction structure is arranged between the electrode assembly and the heat exchange case wall in the manner of heat conduction.