Technology Development for High Efficiency High Power Density EV DC - DC Converter

温室气体(GHG)困住地球的热量，导致全球变暖。电动汽车(EVS)可以在支持加拿大根据《巴黎协定》实现的温室气体减排目标方面发挥非常重要的作用。加拿大已经制定了雄心勃勃的目标，到2040年在加拿大销售的100%新车成为电动汽车。为了实现这一目标，需要更小、更高效的电动汽车DC-DC转换器来帮助电动汽车实现更轻的重量和更高的能源效率。电动汽车采用率放缓的主要因素之一是有限的行驶里程。本研究项目致力于通过减轻电动汽车的重量(减少功率转换器的重量/尺寸)和提高效率来降低驾驶所需的能量。该项目将开发同时实现这两个目标的技术，设计一种高功率(3800W)、高效率、高功率密度的DC-DC转换器，将高电压(~330V)从高功率电池转换为低电压(~14V)，用于电动汽车的信息处理和辅助电源。将开关可控电容(SCC)技术应用于LLC谐振变流器，以实现谐振变流器的均流和交错工作。当SCC-LLC技术与下一代GaN(氮化镓)开关相结合时，所提出的电动汽车DC-DC转换器的功率密度将比现有产品增加一倍以上，功率损耗降低50%。该项目完成后，加拿大公司将能够生产出最小、效率最高的电动汽车DC-DC转换器。这将使加拿大公司成为蓬勃发展的电动汽车市场的领先供应商。它还将加快电动汽车的采用率。

Greenhouse gas (GHG) traps the earth's heat and contributes to global warming. Electric Vehicles (EVs) can play a very important role in supporting Canada's GHG reduction goals under the Paris Agreement. Canada has set the ambitious goal of 100% new vehicles sold in Canada to be EVs by 2040. To meet this goal, smaller and highly efficient EV DC - DC converters are needed to help EVs achieve lighter weight and higher energy efficiency. One of the major factors to slow EV's adoption rate is the limited driving range. This research project focuses on reducing the energy needed for driving by lightening the weight carried by the EV (reducing the weight / size of the power converters) and increasing efficiency. This project will develop the technologies to simultaneously achieve both goals by designing a high power (3,800W), high efficiency, and high power density DC - DC converter, which will convert the high voltage (~330V) from the high power battery to low voltage (~14V) for information processing and auxiliary power in the EV. Switch-Controlled-Capacitor (SCC) technology will be applied to LLC resonant converters to achieve current sharing and interleaving operation of the resonant converters. When SCC - LLC technology is combined with the next generation GaN (Gallium Nitride) switches, the proposed EV DC - DC converter will more than double the power density and reduce the power loss by 50% as compared with existing products.Upon the completion of this project, the Canadian companies will be able to produce the smallest EV DC - DC converter with the highest efficiency. It will establish the Canadian companies in a leading position as suppliers in the booming EV market. It will also expedite the adoption rate of EVs.