The introduction of computer-aided design systems into the vehicle development process makes it possible to reduce the time between creating a concept and receiving the finished product. Application of a digital twin in the creation of electric vehicles allows not only to reduce design time, but also to improve the key characteristics of the product, to study the operation of the vehicle in a wide variety of driving and operating modes due to connection with its physical twin throughout the entire life cycle. This paper proposes the concept of a digital twin of the temperature control system for an electrified vehicle of category L and reviews the experience of creating a test bench for the temperature control system of an electric vehicle connected to a virtual environment. Use of data on the creation of a stand for the temperature control system of an electric vehicle will allow the development of a full-fledged experimental stand for assessing the accuracy of a digital twin of the temperature control system for an electrified vehicle of category L in extreme climatic conditions. The necessary mathematical models included in the digital twin were identified. This digital twin will be useful for various companies involved in the development and production of electrified vehicles, as well as for organizations engaged in research activities in the field of electrical engineering and automotive engineering.