Power Storage Device Thermal Management via Chassis Gap Airflow
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Solution Overview
Problem
Existing power storage devices face challenges in efficiently dissipating heat generated by power conversion devices, leading to potential battery degradation and safety risks due to high temperatures, as previous solutions like thermal insulation and heat sink configurations are insufficient for devices with large heat generation.
Innovation Solution
A power storage device design featuring a metallic chassis with a gap portion between the battery module and power conversion device, utilizing air flow through strategically placed openings to enhance heat radiation, with the chassis members made from metallic materials to efficiently transfer and radiate heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal insulation members are used to isolate the power conversion device from the battery module, then battery safety is improved, but heat dissipation from the power conversion device deteriorates
Solution Approach 1:
The device is divided into distinct thermal zones: a first heat dissipation space for the power conversion device and a second heat dissipation space for the battery module, separated by insulating members. This segmentation allows independent thermal management for each component, enabling effective heat dissipation while maintaining safety isolation.
Solution Approach 2:
Insulating members are positioned between the power conversion device and battery module to act as thermal mediators. These intermediaries block heat transfer from the power conversion device to the battery while allowing each component to dissipate heat independently into their respective spaces, resolving the contradiction between safety isolation and heat dissipation.
2Volume of stationary object
If the power conversion device is positioned close to the battery module to reduce device size, then compactness is improved, but temperature of the battery module increases
Solution Approach 1:
The housing is divided into separate thermal zones with dedicated heat dissipation spaces for the power conversion device and battery module. This spatial segmentation allows compact arrangement of components while maintaining thermal independence, preventing temperature rise in the battery module even when components are closely positioned.
Solution Approach 2:
Heat dissipation is achieved by utilizing the vertical dimension through upper and lower heat dissipation spaces, allowing thermal management in three-dimensional space rather than just horizontal separation. This enables compact device size while maintaining effective heat dissipation pathways.
3Loss of energy
If heat sink structures are added to increase heat dissipation surface area, then heat dissipation ability is improved, but device complexity increases
Solution Approach 1:
The housing structure serves multiple functions: it provides mechanical support, defines heat dissipation spaces, and acts as a thermal management system. By making the housing multi-functional, additional heat dissipation capabilities are achieved without adding separate complex heat sink structures, maintaining simplicity while improving heat dissipation ability.
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 configuration effectively radiates heat from both the battery module and power conversion device, reducing the risk of thermal runaway and battery degradation, thereby enhancing the overall heat-radiating ability of the power storage device.
Implementation Method 1
a first chassis member which is formed from a metallic material... a second chassis member which is formed from a metallic material
Implementation Method 2
utilizing air flow through strategically placed openings to enhance heat radiation
Implementation Method 3
a gap portion is formed between the first main surface portion and the second main surface portion... used for making air taken through the plural openings of the lower lid flow via the plural openings of the upper lid
Data Source
AI summary
Provided is a power storage device including: a first chassis member; a second chassis member; a power inlet; one or plural power outlets; a battery module; a power conversion device; a housing; a lower lid; and an upper lid. The battery module is fixed closely to one surface of the first main surface portion. The power conversion device is fixed closely to one surface of the second main surface portion. A gap portion is formed between the first main surface portion and the second main surface portion by disposing the other surface of the first main surface portion and the other surface of the second main surface portion to face each other. The space is used to make air taken through the plural openings of the lower lid flow via the plural openings of the upper lid.