The invention discloses a 12V/48V DCDC converter for a vehicle, and belongs to the technical field of automobile electric appliance control. Comprising a main DCDC loop and a uDCDC loop which are connected in parallel. The main DCDC loop is a bidirectional Buck-Boost circuit, and the main DCDC loop is a bidirectional Buck- The uDCDC loop comprises a Buck power circuit and an ORing circuit which are connected in series with each other; the Buck power circuit and the ORing circuit are connected with the positive electrode of the super capacitor module, and the negative electrode of the super capacitor module is grounded to form a pre-charging loop. The system is provided with a high-power main DCDC and a low-power uDCDC, so that a 12V battery of the whole vehicle can be omitted, meanwhile, the uDCDC is combined with the super capacitor module, the constant-current voltage limiting function is achieved, and when a 12V load end is short-circuited, the super capacitor module releases short-circuit current, fuses a short-circuit loop fuse and protects 12V main node voltage within a normal working required range.
本发明公开了一种车用12V/48V DCDC转换器,属于汽车电器控制技术领域。包括:相互并联的主DCDC回路和uDCDC回路;所述主DCDC回路为双向Buck‑Boost电路;所述uDCDC回路包括相互串联的Buck功率电路和ORing电路;所述Buck功率电路和ORing电路之间与超级电容模块正极相连,所述超级电容模块负极接地,形成预充回路。本发明分别具备大功率主DCDC和小功率uDCDC,使得整车可取消12V电池,同时uDCDC结合超级电容模块,具备恒流限压功能,在12V负载端出现短路时,超级电容模块释放短路电流,熔断短路回路保险丝,保护12V主节点电压在正常工作要求范围内。
12V/48V DCDC converter for vehicle
一种车用12V/48V DCDC转换器
2025-02-18
Patent
Electronic Resource
Chinese
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