Monolithic voltage detector of fuel battery group

The utility model relates to a detection device for fuel cell stack single chip voltage, including a detection plate, a CAN network controller, a keyboard, a liquid crystal display unit and a USB storage unit. The utility model is characterized in that: the monocells in the fuel cell stack are connected with the outputs of all detection plates; the detection plate CAN sub-network is composed of a plurality of detection plates by CAN bus; CAN network controller is in twin CAN structure, wherein, one aspect is connected with the detection plate CAN network and the other aspect is connected with the outer CAN network. The two CAN networks are independent with each other and constitute network topology. The keyboard, liquid crystal display unit and USB storage unit are connected with the CAN network controller respectively. The CAN network is also provided with RS-232 and RS-485 interface and could be connected with PC or other equipments by RS-232, RS-485 or CAN interface. The whole detection device has the advantages of concise and clear circuit, high reliability, lower cost, good expansibility and high precision detection of fuel cell stack single chip voltage.