The widespread application of OTA technology has promoted the process of software-defined vehicles. In order to achieve the development of OTA cloud platform and vehicle terminal communication links and meet the authenticity and integrity requirements of foreign ECE-R156 regulations. This paper designs the four-layer hierarchical architecture of the cloud platform and deploys the cloud platform through front-end and back-end offloading. Vehicle-side architecture design, and definition of version detection, software package download, and update installation during the update process. An OTA system security architecture scheme is proposed, the cloud platform signs the uploaded software package, uses HTTPS encrypted channel transmission, and the vehicle terminal verifies and decrypts the software package. Finally, the OTA test environment is built, and the software upgdate test of the automotive VCU is carried out to verify the effectiveness of the OTA system architecture and the system security scheme.
With the rapid development of electric vehicles, the safety issues caused by overheating of power batteries are increasing, and even affecting the users' lives. Based on this, the state has issued relevant policies requiring measures to inform users before power batteries thermal runaway occur. In this paper, a set of early warning scheme for thermal runaway of power batteries based on DCF is designed. The core of this scheme is the monitoring algorithm of DCF integrated power batteries system, which combines the relevant information of DCF to actively push early warning information to vehicle users and restrict related activities within a certain period of time. In addition, a maintenance manual is generated for risky vehicles for maintenance personnel to use, so as to reduce the risk of thermal runaway caused by power batteries in the above way.
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