Secondary Battery Dynamic Thermal Management via Fluid Duct
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Solution Overview
Problem
Secondary sodium-sulfur batteries face challenges in maintaining optimal operating conditions due to heat accumulation and excessive energy consumption, especially during varying load conditions, as the existing heat insulating structures are not adaptable to changing power demands.
Innovation Solution
A secondary battery design featuring a box body and lid body with a duct allowing fluid flow between them, enabling efficient heat management through external cooling during high loads and utilizing internal heat during low loads, without requiring physical changes to the heat insulating structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If vacuum heat insulating structure is adopted for the box body and lid body, then heat accumulation is avoided and temperature control is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies the dynamics principle by making the heat insulating structure adjustable rather than fixed. The lid body can be switched between vacuum heat insulating structure (for high load conditions) and atmospheric heat insulating structure (for low load conditions), allowing the system to adapt to varying thermal requirements dynamically.
Solution Approach 2:
The heat insulating structure is segmented into two distinct configurations: vacuum heat insulating structure for the box body and lid body, and atmospheric heat insulating structure for the lid body. This segmentation allows selective application of different insulation types based on operational conditions.
2Ease of manufacture
If atmospheric heat insulating structure is adopted for the lid body, then device complexity is reduced and ease of manufacture is improved, but heat accumulation occurs during high load conditions
Solution Approach 1:
The system dynamically switches between atmospheric and vacuum heat insulating structures based on load conditions. During high load conditions when heat accumulation occurs, the lid body is configured with vacuum heat insulating structure to prevent excessive temperature rise, while during low load conditions, atmospheric heat insulating structure is used to reduce manufacturing complexity.
3Device complexity
If the heat insulating structure is fixed, then device complexity is reduced, but adaptability to varying load conditions deteriorates
Solution Approach 1:
The heat insulating structure is designed to be dynamically adjustable between vacuum and atmospheric configurations, enabling the system to adapt to varying load conditions. This dynamic capability allows optimal thermal management whether the battery is operating under high load (requiring vacuum insulation) or low load (allowing atmospheric insulation).
Solution Approach 2:
The lid body is designed with multi-functionality, capable of serving with either vacuum heat insulating structure or atmospheric heat insulating structure depending on operational requirements. This universal design allows a single component to fulfill different thermal management roles based on system needs.
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 maintains optimal operating temperatures and reduces energy consumption by efficiently managing heat through external cooling during high loads and utilizing internal heat during low loads, thus enhancing the battery's charging/discharging efficiency and extending its operational lifespan.
Implementation Method 1
it may be considered to adopt vacuum heat insulating structure for the box body containing the battery assembly
Implementation Method 2
adopt atmospheric heat insulating structure for the lid body closing the opening of the box body
Implementation Method 3
The duct is provided at least between the box body and the lid body, and configured to allow fluid to flow through the duct
Data Source
AI summary
A secondary battery has: a box body having a heat insulating structure, the box body having an opening on the upper surface thereof and an assembled battery housed therein; a lid body having a heat insulating structure, the lid body sealing the opening of the box body; and a duct which is installed at least between the box body and the lid body and inside which a fluid circulates.