Magnetic Circulating Liquid for Battery Temperature Uniformity
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Solution Overview
Problem
Current temperature control systems for rechargeable battery packs suffer from non-uniform temperature distribution across battery cells, leading to unbalanced aging and reduced performance, and are costly due to complex designs that only focus on cooling without heating capabilities.
Innovation Solution
A system utilizing a heat conducting liquid with magnetic materials enclosed in a closed housing, driven by a circulating module, such as a motor with a magnetic rotor, to circulate and uniformly distribute temperature across battery units, both cooling and heating as needed, with a simple structure and low construction costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a complex temperature control system with cooling manifolds and heat exchangers is used, then cooling effectiveness is improved, but device complexity and cost increase
Solution Approach 1:
The invention extracts the temperature control function from complex dedicated cooling manifolds and heat exchangers, and implements it through a simplified circulating module with heat conducting liquid that can be integrated into the battery pack structure, thereby reducing device complexity while maintaining cooling effectiveness
Solution Approach 2:
The circulating module with heat conducting liquid serves multiple functions: cooling during charging/discharging, heating during low temperature operation, and uniform temperature distribution across all battery cells, replacing the need for separate dedicated cooling and heating systems
2Temperature
If cooling manifolds and heat exchangers are installed to control temperature, then temperature control capability is improved, but manufacturing cost increases
Solution Approach 1:
The invention replaces expensive metal cooling manifolds and heat exchangers with a cost-effective heat conducting liquid that can be easily manufactured and integrated, significantly reducing material costs while maintaining temperature control functionality
Solution Approach 2:
The invention uses a hydraulic system (heat conducting liquid circulation) instead of complex thermal conduction structures, leveraging fluid dynamics to achieve uniform heat distribution at lower manufacturing cost
3Temperature
If battery cells are cooled during charging/discharging, then heat dissipation is improved, but temperature uniformity across cells deteriorates
Solution Approach 1:
The circulating heat conducting liquid provides localized heat absorption and distribution to each battery cell individually, allowing each cell to maintain its optimal temperature while contributing to overall temperature uniformity across the pack
Solution Approach 2:
The system uses temperature sensors to monitor individual cell temperatures and adjusts the circulation flow accordingly, creating a feedback mechanism that maintains temperature uniformity while effectively dissipating heat from each cell
4Temperature
If dedicated cooling systems are implemented, then cooling performance is improved, but adaptability to different temperature conditions deteriorates
Solution Approach 1:
The heat conducting liquid circulation system serves multiple temperature control functions: active cooling during high-rate charging/discharging, passive heat distribution during normal operation, and active heating during low temperature conditions, making the system adaptable to all temperature scenarios
Solution Approach 2:
The system dynamically adjusts the circulation rate and flow distribution based on real-time temperature conditions and battery operational state, transitioning between cooling and heating modes as needed to maintain optimal temperature uniformity across all cells
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
Achieves uniform temperature distribution across battery units, extending the life cycle of rechargeable battery packs by maintaining healthy operational characteristics and allowing for both cooling and heating, while reducing costs through a simplified design.
Implementation Method 1
a heat conducting liquid with magnetic materials enclosing the battery units and being capable of substantially circulating around the battery units
Implementation Method 2
a circulating module, installed inside the closed housing, for driving the heat conducting liquid to circulate around the battery units
Implementation Method 3
The circulating module is a motor with a magnetic rotor or a device having a magnetic rotor driven by change of magnetic forces outside the closed housing
Data Source
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AI summary
A system (100) for uniformly distributing temperature across battery units (110) is disclosed. The system (100) includes: a heat conducting fluid (120), enclosing the battery units (110) and being capable of substantially circulating around the battery units (110) and/or along a specified path among the battery units (110); a closed housing (130), enclosing the battery units (110) and the heat conducting fluid (120); and a circulating module (140), installed inside or outside the closed housing (130), for driving the heat conducting fluid (120) to circulate around the battery units (110) and/or along the specified path. When the circulating module (140) drives the heat conducting fluid (120) to circulate, temperature across the battery units (110) is substantially uniformly distributed.