M&IMaterials, the University of Warwick Manufacturing Engineering (WMG) and Ricardo Consulting, jointly launched the i-CoBat project to develop and demonstrate new electric vehicle battery cooling technology using M&IMaterials degradable media coolant MIVOLT for testing immersion Cool the battery pack concept.
As the automotive industry transitions to electrification, high-capacity batteries used in electric vehicles face significant challenges in thermal management. The operating temperature range of the battery is narrow. Once the limit temperature is exceeded, the performance and efficiency of the battery will decrease and the aging will be accelerated. In extreme cases, exceeding the operating limit may cause the battery to run out of control, cause a catastrophic failure, and may cause a fire.
When charging quickly, the battery generates three times as much heat as normal driving and charging. Currently, electric vehicle battery packs typically use wind cooling, or use water/glycol for cold plate cooling or refrigerant. With these thermal management systems, charging speed and fast charge times are limited. One way to increase mileage is to increase the battery pack size, but this will add significant cost.
The i-CoBat project, led by M&IMaterials, is part of the British government's Faraday Battery Challenge, which encourages the development of the latest electric vehicle battery technology. In the i-CoBat project, the researchers used M&IMaterials' degradable medium coolant MIVOLT, which chemically acts as a medium coolant to remove heat directly from the surface of the cell. This is because the MIVOLT medium liquid is not electrically conductive and can be in direct contact with the battery pack. Liquid immersion cooling with MIVOLT allows heat transfer from the heat source without the need for a secondary indirect cooling system, providing a simpler thermal management solution.
This innovation is expected to improve power output and battery life, speed up charging, while reducing costs, effectively solving mileage anxiety problems. David Greenwood, professor of advanced drive systems at the University of Warwick's School of Manufacturing Engineering, said: "This is not just about keeping the battery cool, but also optimizing the operating temperature."