BATTERY PACK ISOLATION SYSTEM IN ELECTRICAL AND HYBRID ELECTRICAL VEHICLES

摘要

The invention relates to a battery pack isolation system in electrical and hybrid electrical vehicles. The said system comprising a series of battery modules (11) packed inside a battery pack of the vehicle. A pyrotechnic switch is integrated between the battery modules inside the battery pack (10). An ECU/controller/sensor (15, communicating to the vehicle abnormal condition sensor to get the signal, Connected to the said pyrotechnic switch (12); a battery management system (13) communicating to send the signal to a pyrotechnic switch (12). The hybrid control area network (HYBRID CAN) communicating to BMS. A hybrid control unit communicating to said hybrid CAN. The vehicle CAN receiving signal from the said ECU/controller/sensor unit communicating to the said hybrid control unit. And the arrangement is such that the said pyrotechnic switch (12) is set in such a way that on getting the abnormal condition sensor signal enables disconnection of the battery module (11) which in turn cuts off the power supply to all the high voltage devices inside the vehicle with safety feature and in case of failure to disconnect due to some malfunction of hardwired signal fails the said hybrid CAN network (14) and a vehicle can network (16) automatically takes the charge to disconnect/isolate the HV Battery pack (10) from the rest of the vehicle by communicating the said ECU/controller/sensor (15) crash active status to the BMS (13) via Hybrid Control Unit (17), where the BMS (13) will open the HV main relays.