In addition, the management module 200 further includes a wireless receptor 204 mounted on the management circuit board 203 for receiving the data from the wireless transmitters 306 of the sensing units 300. FIG. 4 shows a battery system for an electric vehicle according to a third embodiment of the disclosure. The third embodiment is similar to the second embodiment except that in the third embodiment, the wireless transmitter 306 and the wireless receptor 204 are not included, and a circuit on the printed circuit board 305 is electrically connected to a circuit on the management circuit board 203 so as to permit data collected by the connectivity sensor 301, the flow meter 302, the pressure sensor 303, and the temperature sensor 304 to be transmitted to the management circuit board 203.