传统的车载铅酸电池都布置在发动机舱内，而新型的车载低压锂电池却布置在后排座椅下或后备厢下。为解决车载低压锂电池因布置隐蔽、负极难触及而无法像铅酸电池一样手动断电的问题，文章提出一种诊断软件控制的低压回路通断方案。通过软件指令切断低压回路，并借助外露尾门开关和特制OBD 插头进行硬线唤醒，实现售后检修或工厂电检时的快速通断电，减少人工拆卸电池的次数。

Traditional automotive lead-acid batteries are housed in the engine bay, whereas the new low-voltage lithium packs are installed under the rear seats or trunk floor. Because the lithium battery 's negative terminal is hidden and out of reach, it cannot be disconnected manually like its lead-acid counterpart. To solve this problem, the paper presents a diagnostic-software-controlled on/off scheme: a software command opens the low-voltage circuit, and a hard-wired wake-up provided by an exposed tailgate switch and a dedicated OBD plug-re-closes it. This allows service technicians or end-of line testers to power-cycle the battery quickly, eliminating repeated manual removal of the battery.