Test Technologies Contributing to Electrification1. IntroductionFig. 1 Schematic of the development process of automobiles (V-process)2.1 Test technologies to understand market 332. Various test technologiesrequirements and customers2.2 Vehicle test technologies*Customer Performance and Vehicle Test Engineering Department No.2The role of the Test Department in Nissan Motor Company's R&D division is to set performance targets for vehicles and systems that meet customer expectations and market requirements worldwide. It involves evaluating the achievement of performance targets through physical assessment after the design and prototyping phase. The engineers in the Test Department determine the type of tests necessary to fulfill this role. They are responsible for introducing the required equipment and measuring instruments for conducting tests, as well as developing evaluation and measurement technologies.In this feature, we will introduce Nissan Motor Company's test technologies contributing to the electrification of vehicles as one of the responses to the current issue of global warming.technology, particularly test Fig 1 represents a simplified and conceptualized depiction of the automotive development process. It illustrates the vehicle hierarchy from the top (vehicle level) to the bottom (parts level). The development of a new car starts from the top-left and progresses towards the top-right, development completion and start of sales. The role of the Test Department starts from the upper left section of the V-Model, from "Market Requirements and Customer Understanding" to "Vehicle Target Setting". Depending on the performance domain, the Test Department may also be involved in activities such as "Performance Allocation and Planning for Systems and Components". Afterward, the responsibilities shift to the design department and parts suppliers for "Parts Design" and "Parts Evaluation", followed by the Test Department's involvement in "System and Component Evaluation" and "Vehicle Evaluation" once again. To establish performance targets, it is necessary to understand how customers worldwide use and drive their cars, their expectations at that time, and the usage environment. Each country or region may have unique usage patterns, and customer expectations vary from person to person. The usage environment encompasses not only road conditions and traffic environments but also various climate conditions such as temperature, humidity, solar radiation, as well as altitude (air density), radio wave environment, and more, which form a vast combination.the To set targets for individual performance, components, and systems among these infinite combinations, it is essential to create a market model and extract scenes that represent the real world. Market research is a classic method used real-world market requirements. This involves observing and interviewing customers, measuring data related to vehicles and the surrounding environment, analyzing the collected data. It requires specific technical expertise and know-how. In recent years, the analysis of big data using statistical methods has also become possible, enabling the understanding of market requirements through the collection and analysis of large amounts of data. These technologies are also essential test technologies.To establish performance targets through vehicle-based tests and evaluate the achievement of vehicle performance, it is necessary to compare and evaluate the to understand 1. Test technologies that support the competitiveness of electric vehiclesKohichiro Tanaka*
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