The invention discloses a PHEV (hybrid electric vehicle) low-voltage power supply system which comprises a power battery, a first low-voltage storage battery and a second low-voltage storage battery, the first low-voltage storage battery is connected with a low-voltage distribution box through a first change-over switch, and the second low-voltage storage battery is connected with the low-voltage distribution box through a second change-over switch. The low-voltage distribution box is connected with a plurality of whole vehicle low-voltage loads; the first change-over switch and the second change-over switch are used for respectively controlling the first low-voltage storage battery and the second low-voltage storage battery to be in a connection state, a disconnection state and a diagnosis state; the invention further discloses a control method of the low-voltage power supply system of the PHEV, and the control method comprises the steps that when a pure electric mode is switched to a fuel oil mode, the first low-voltage storage battery supplies power to the starter, and the second low-voltage storage battery supplies power to the low-voltage load of the whole vehicle; and when the low-voltage large-current demand exists, the second low-voltage storage battery supplies power to the low-voltage load of the whole vehicle. The stability of power supply voltage of the low-voltage power supply is improved, and the large-current power supply requirement is met.
本发明公开了一种PHEV混合动力汽车低压电源供电系统,包括动力电池和第一低压蓄电池,第一低压蓄电池通过第一切换开关连接着低压配电盒,还包括第二低压蓄电池,第二低压蓄电池通过第二切换开关连接着低压配电盒,低压配电盒与多个整车低压负载连接;第一切换开关和第二切换开关用于分别控制第一低压蓄电池和第二低压蓄电池处于连通、断开以及诊断状态;本发明还公开一种PHEV混合动力汽车低压电源供电系统的控制方法,包括当纯电模式切换为燃油模式时,使第一低压蓄电池给起动机供电,第二低压蓄电池给整车低压负载供电;当存在低压大电流需求时,使第二低压蓄电池给整车低压负载供电。本发明提升低压电源供电电压的稳定性,满足大电流供电需求。
PHEV (hybrid electric vehicle) low-voltage power supply system and control method
PHEV混合动力汽车低压电源供电系统及控制方法
2022-04-29
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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