A method for detecting an insulation fault in a vehicle electrical system having an HV electrical system branch (HB) and an LV electrical system branch (LB) provides that the LV electrical system branch (LV) has a positive supply potential (L +) and a negative supply potential (L-) corresponding to a ground potential (M) of the vehicle electrical system. The HV on-board electrical system branch (HB) has a positive HV potential (+) and a negative HV potential (-), which are electrically separated from the potential of the LV on-board electrical system branch (LB). An insulation fault (RF) between at least one of the HV potentials (-, +) and a positive LV potential (L +, G +) is detected by identifying a current (I) flowing through a voltage limiting circuit (SG) connected between a ground potential (M) and the positive LV potential (L +, G +).
一种用于检测具有HV车载电网分支(HB)和LV车载电网分支(LB)的车辆车载电网中的绝缘故障的方法规定了,LV车载电网分支(LV)具有正的供应电位(L+)和对应于车辆车载电网的接地电位(M)的负的供应电位(L‑)。HV车载电网分支(HB)具有正的HV电位(+)和负的HV电位(‑),它们与LV车载电网分支(LB)的电位电隔开。通过识别流过连接在接地电位(M)与正的LV电位(L+、G+)之间的限压电路(SG)的通过电流(I),来检测HV电位(‑、+)中的至少一个HV电位与正的LV电位(L+、G+)之间的绝缘故障(RF)。
Method for detecting insulation fault in vehicle electrical system
用于检测车辆车载电网中的绝缘故障的方法
2023-01-31
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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