NESTA Six-Dimension Electric Safety: Vehicle Charging Safety Dimension
2024-08-08
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Source: Overseas Network
In terms of vehicle charging safety, starting from reproducing the user's actual vehicle charging failure scenarios, five sub-projects were proposed: laboratory charging compatibility safety verification, virtual scene charging compatibility safety verification, high and low temperature environment charging safety verification, charging process personnel protection safety verification and charging station charging safety field verification.
In terms of laboratory charging compatibility and safety verification, the concept of building a "brand supermarket" for charging piles was proposed. Relying on the "China Charging Conditions" database, more than 100 AC and DC charging piles covering mainstream brands and models in the market were selected, and various real-vehicle and real-pile charging test scenarios were reproduced in the laboratory, gradually realizing the "off-site laboratory localization" of charging compatibility and safety verification.
At the same time, we carry out charging compatibility safety verification in virtual scenarios, simulate different characteristic variables in different charging stages based on the virtual test system, and then reproduce customized typical charging failure cases to achieve test simulation of the entire charging process, all failure scenarios, and all power levels. Currently, the laboratory has accumulated more than 200 test cases of various types, and will continue to iterate and enrich them in the future.
In addition, in order to verify the charging safety issues under high and low temperature environmental conditions, especially the high-power charging safety issues, a wide temperature and high-power charging test system simulating a -40℃~60℃ environment is built, which can efficiently and high-quality carry out the calibration of charging performance and optimization of charging strategies.
Secondly, it is also very important and necessary to carry out personnel protection safety verification during the charging process. This project proposes personnel electric shock protection requirements, thermal accident protection requirements, AC and DC charging additional requirements and functional safety requirements during the charging process, and the relevant requirements are also written into the national standards to be released soon.
The last step is to conduct on-site verification of vehicle charging safety, aiming to alleviate users’ anxiety about recharging in cities and on highways, and to establish the “China Charging Conditions” map database with the highest coverage and the most comprehensive data in the industry, covering mainstream cities and highways, so as to carry out efficient and professional vehicle charging adaptability road tests on this basis.
