Cylindrical Battery Pack Thermal Panels for Rapid Temperature Control
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Solution Overview
Problem
Li-ion battery packs experience performance deterioration at ultra-low temperatures and heat management issues, leading to potential fires or explosions due to inadequate temperature control, particularly in large-capacity batteries.
Innovation Solution
A battery pack design featuring heating and heat-dissipating components attached above and below cylindrical cells, utilizing high thermal conductivity metal panels and various heat transfer methods (heating pads, wires, liquid heaters, or coolers) to quickly adjust internal temperatures, thereby stabilizing operation across temperature extremes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heating component is attached to the side surface of a cylindrical cell, then the internal temperature can be increased, but the heat transfer time becomes excessively long
Solution Approach 1:
The heating component is repositioned from the side surface to the top surface of the cylindrical cell. This dimensional change allows heat to be applied directly to the electrode assembly through the terminal structure, significantly reducing the thermal path length and heat transfer time while maintaining effective temperature control
2Temperature
If a heating component is attached to the side surface of a cylindrical cell, then temperature control is achieved, but the assembly becomes complex due to repelling forces
Solution Approach 1:
By moving the heating component from the side surface to the top surface, the design eliminates the repelling force issues that occur during side surface attachment. The top surface mounting provides a stable, flat mounting area that simplifies the assembly process and reduces structural complexity
Solution Approach 2:
The top surface structure serves multiple functions: it provides mechanical support for the heating component, acts as a thermal conduction path, and maintains electrical isolation. This multi-functionality reduces the need for additional separate components, simplifying the overall assembly
3Temperature
If heat dissipating components are attached to side surfaces in a zigzag shape, then heat removal is achieved, but the configuration becomes difficult to assemble
Solution Approach 1:
The heat dissipating components are repositioned from side surface zigzag attachment to top surface mounting. This dimensional change provides a flat, stable mounting platform that is much easier to manufacture and assemble, while still achieving effective heat removal through direct thermal contact with the electrode assembly
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 enables quicker temperature adjustments, ensuring stable battery pack operation, facilitating easier assembly, and enabling the production of large-capacity batteries with improved safety and performance by enhancing heat transfer efficiency and reducing assembly complexities.
Implementation Method 1
a heating component for applying heat to a plurality of cylindrical cells... a first metal panel positioned below the upper end cover and jointed to the upper portion of the cylindrical cells... a second metal panel jointed to a lower portion of the cylindrical cells
Implementation Method 2
a heat-dissipating component for absorbing heat generated from a plurality of cylindrical cells... a first metal panel positioned below the upper end cover and jointed to the upper portion of the cylindrical cells... a second metal panel jointed to a lower portion of the cylindrical cells
Data Source
AI summary
The present disclosure relates to a battery pack, and more particularly, to a battery pack, the temperature of which is maintained within a certain range by a heating component or a heat dissipating component attached thereto.