Battery thermal management for high rate applications

新的和拟议的电动汽车(EV)将以非常高的速度快速充电，但在长途旅行中会短暂停顿。这对现有的配电网造成了很大的压力。充电站不需要增加新的“电线杆和电线”，而是可以通过增加固定电池来“支持电池”。ECamion是加拿大电池储能系统的开发商和制造商。他们已经在安大略省各地部署了这些设备，目前已签约交付新的更高功率的系统。ECamion的市场正在朝着更快的充电速度发展，他们目前的电池冷却系统不再足以在高速运行期间保持统一的冷却温度。需要新的热管理技术来在以非常高的速率(4C+)运行的同时保持这种固定式电池的冷却。尽管电动汽车可能需要几个小时才能放电，但充电站的电池后备存储必须在几分钟内放电，并有可能同时为多辆电动汽车充电。在这项研究项目中，将探索新的和新颖的电池热调节系统，以确定其性能的提高，同时保持在充电站的原始足迹内。该项目分为三个阶段。首先，现有的电池热调节系统将使用高分辨率的电和热测量技术对其性能进行评估，以创建明确和全面的热响应图景。其次，将设计新的强制空气和/或相变材料系统，以解决不均匀问题(例如热点)，并确保满足总体冷却速度。最后，新的设计将在一个系统中进行测试，以展示其在应用中的性能。鉴于能源储存市场和产品的巨大发展，预计NSERC Engage项目将导致长期的学术和产业关系。将培训两名新的HQP，该项目支持加拿大政府在电动汽车和快速充电方面的倡议。

New and proposed electric vehicles (EV) will fast charge at very high rates while briefly stopped on long distance travels. This places significant stress on the existing electrical distribution grid. Instead of adding new "poles and wires", charging stations can be "battery-backed" by adding stationary batteries. eCamion is a Canadian developer and manufacturer of battery energy storage systems. They have deployed these throughout Ontario and are presently contracted to deliver new higher power systems. eCamion's market is evolving to faster charging rates and their present battery cooling system is no longer sufficient to maintain uniform cool temperature during high rate operation. There is a need for new thermal management techniques to keep such stationary batteries cool while operating at very high rates (4C+). Whereas the EV might take hours to discharge, the battery backed storage at the charge station must discharge in minutes, and potentially to multiple EVs simultaneously. In this research project, new and novel battery thermal conditioning systems will be explored to determine their performance enhancement while remaining within the original footprint of the charge station. The project has three phases. First, the existing battery thermal conditioning system will have its performance evaluated using high resolution electrical and thermal measurement techniques to create a well-defined and comprehensive picture of thermal response. Second, new forced-air and/or phase-change-material systems will be designed to address non-uniformity (e.g. hot-spots) and insure overall cooling rate is met. Finally, the new design will be trialed in a system to demonstrate its performance in the application. It is expected that this NSERC Engage Project will lead to a long-term academic-industrial relationship given the massively expanding energy storage market and product evolution. Two new HQP will be trained and this project supports the Canadian Government's initiatives for electric vehicles and fast charging.