Battery Pack Heat Dissipation and Vibration Isolation
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Solution Overview
Problem
Battery packs used in electronic devices and electric vehicles face performance deterioration due to heat generation and vibrations from driving sources, which can lead to reduced efficiency and lifespan.
Innovation Solution
A battery pack design incorporating a heat conductive member between the exterior case and battery electrodes, and a vibration-proof member between the exterior case and battery holder, with the vibration-proof member being thicker than the heat conductive member, along with a heat-radiating portion on the exterior case and a waterproof member to cover electrodes, utilizing materials like inorganic-filler-containing silicon resin and ethylene propylene diene rubber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat conductive member is interposed between the exterior case and battery electrodes, then heat dissipation is improved, but the thickness of the exterior case wall must be reduced
Solution Approach 1:
The exterior case wall is segmented into multiple functional layers: a heat conductive member layer for thermal management, a vibration-proof member layer for mechanical protection, and structural wall portions. This segmentation allows each layer to perform its specific function optimally without compromising overall wall integrity or thickness.
Solution Approach 2:
The exterior case employs composite material construction with different layers made from materials optimized for specific functions: heat conductive materials (such as aluminum or copper alloys) for thermal dissipation, vibration-proof materials (such as rubber or foam) for mechanical isolation, and structural materials for overall strength. This composite approach resolves the contradiction by combining materials with complementary properties.
2Object-affected harmful factors
If a vibration-proof member is interposed between the exterior case and battery holder, then vibration isolation is improved, but the thickness of the exterior case wall must be reduced
Solution Approach 1:
The exterior case wall is divided into distinct functional segments including a vibration-proof member layer positioned between the exterior case and battery holder, and other structural layers. This segmentation enables the vibration-proof layer to be optimized for shock absorption while maintaining overall wall thickness and structural integrity.
Solution Approach 2:
The exterior case uses composite construction with vibration-proof materials (such as rubber, foam, or elastomers) integrated into the wall structure. These materials provide vibration isolation while the composite structure maintains sufficient wall thickness for mechanical strength, resolving the contradiction between protection and thickness.
3Temperature
If both heat conductive member and vibration-proof member are interposed in the exterior case wall, then both heat dissipation and vibration isolation are improved, but the manufacturing complexity increases
Solution Approach 1:
The heat conductive member and vibration-proof member are merged into a single integrated exterior case wall structure with multiple functional layers. This consolidation reduces manufacturing complexity compared to separate components, while still providing both thermal management and vibration isolation functions through the multi-layer composite wall construction.
Solution Approach 2:
The exterior case wall is designed as a multi-functional component that simultaneously performs structural support, heat dissipation, and vibration isolation functions. By integrating multiple functions into a single unified structure, the design reduces the number of separate parts and assembly steps, thereby lowering manufacturing complexity while achieving multiple protective functions.
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 effectively prevents performance deterioration by efficiently dissipating heat and isolating vibrations, thereby extending the lifespan and maintaining the efficiency of the batteries.
Implementation Method 1
a heat conductive member interposed between a first inner surface of the exterior case and at least one of electrodes of the batteries
Implementation Method 2
a vibration-proof member interposed between a second inner surface of the exterior case and the battery holder
Data Source
AI summary
A battery pack having a heat-radiating structure and a vibration-proof structure is provided. The battery pack includes: a battery block including a plurality of batteries and a battery holder; an exterior case configured to house the battery block; a heat conductive member interposed between a first inner surface of the exterior case and at least one of electrodes of the batteries; and a vibration-proof member interposed between a second inner surface of the exterior case and the battery holder. The vibration-proof member is thicker than the heat conductive member.