At four-thirty in the morning, the factory area of Huanyu New Energy Recycling Co., Ltd. On the outskirts of Haicheng was still shrouded in the mist of early winter. The piercing alarm suddenly cut through the silence and broke the sleepiness of the night shift workers - the ternary lithium battery pack disassembly line in the No. 3 Disassembly workshop heard the scream of equipment failure. What made people even more dizzy was that the monitoring screen showed that a set of retired electric vehicle battery packs to be dismantled was emitting light blue smoke. The background data of the battery management system (BMS) jumped wildly: the cell voltage suddenly rose from 3.2V to 4.7V, far exceeding the safety threshold, and the risk of short-circuit explosion was right in front of them.
