This invention relates to a method for achieving uniform temperature distribution within a battery module, particularly for 18650 Li-ion batteries in electric vehicles (EVs). The technology aims to keep the battery temperature within a crucial range (20-40⁰C) with minimal variation (maximum 5⁰C) during operation to prevent degradation and thermal runaway. It features a novel cooling system that adjusts the coolant flow rate and contact area using an aluminum block, ensuring efficient heat dissipation throughout the battery module.
Figure (1) Flowchart illustrating the algorithm used for designing the battery management system using variable contact area between batteries and the coolant channel; (2) Temperature variation in commercially available and proposed variable contact area geometry-based thermal management systems
Maintaining a uniform and safe temperature within battery modules in electric vehicles (EVs) is challenging due to the significant heat generated during battery discharge, which can lead to degradation and thermal runaway if not properly managed.
- This innovation achieves uniform temperature distribution within the battery module, reducing the risk of thermal runaway.
- Mathematical relationships for iterative design adjustments ensure precise control over heat transfer, optimizing cooling performance.
- Flexible application to various battery sizes and shapes, adaptable to different cooling materials and fluids.
- It utilizes an aluminum block with variable contact area to ensure consistent heat transfer.
- It achieves enhanced cooling effectiveness through both straight and serpentine coolant channels.
Prototypes have been developed using both straight and serpentine coolant channels, demonstrating significant improvements in temperature uniformity and heat dissipation efficiency.
The technology is in the advanced development stage, with proven concepts and mathematical models demonstrating its effectiveness in maintaining uniform battery temperatures.
3
Improving the thermal management of Li-ion batteries enhances the safety, reliability, and longevity of electric vehicles and other battery-powered devices. This contributes to the broader adoption of sustainable energy solutions and supports the transition to cleaner transportation options.
- Electric vehicles (EVs)
- Energy storage systems
- Portable electronic devices
- Industrial battery packs
202221052800
441653