Abstract: A vehicle diagnostic device for an electric vehicle according to an aspect of the present disclosure includes a connector for attaching and detaching to/from a diagnostic controller area network (D-CAN) channel in a vehicle network system of the electric vehicle; a controller area network (CAN) transceiver connected to a first signal line and a second signal line of the D-CAN channel through the connector; a wakeup circuit connected to the first signal line or the second signal line through the connector; and a control circuit for changing from a sleep mode to a wakeup mode in response to an input of a first wakeup signal outputted by the CAN transceiver or a second wakeup signal outputted by the wakeup circuit in the sleep mode, and collect diagnosis data from the vehicle network system through the CAN transceiver in the wakeup mode.

Abstract: A battery management apparatus includes a shunt resistor connected to a battery and a voltage generation unit configured to generate a first output value and a second output value which have a difference therebetween corresponding to a magnitude of a voltage applied to the shunt resistor, in which the difference between the first output value and the second output value corresponds to the magnitude of the voltage applied to the shunt resistor when charging over-current or discharging over-current flows in the shunt resistor.