Design of a Full-Time Security Protection System for Energy Storage Stations Based on Digital Twin Technology

Safety is a prerequisite for promoting and applying battery energy storage stations (BESS). This paper develops a Li-ion battery BESS full-time safety protection system based on digital twin technology. Firstly, from the source of safety risk of BESS, the multi-physical characteristics of “electrical-gas-sound-image” in the thermal runaway (TR) process are integrated, and a multi-level early warning protection method for BESS is proposed. It can realize real-time sensing and early warning of multi-time scale safety status from regular operation, micro-overcharge, and TR to fire. Based on the digital twin technology, the core features of the BESS digital twin are described in six aspects: the accurate mapping of virtual reality, real-time sensing, and edge processing, and the overall design framework of the digital twin BESS safety protection system is proposed. The digital twin safety protection system can fully use BESS's massive operation data, improve BESS's safety coefficient and uncover potential failure risks, providing a new idea for the digitalization and intelligence of BESS operation supervision and safety production.