Battery device for electric vehicle

Abstract

A battery device is disclosed. More specifically, the present invention relates to a battery device for an electric vehicle, the battery device having an easily attachable / detachable structure and thus being capable of providing a solution to insufficient battery capacity during long distance driving. According to one embodiment of the present invention, a battery module is configured into a structure in which a plurality of chargeable battery cells are attached / detached in a stacked manner, and a plurality of the battery modules are configured so as to be mountable in a case which is loaded in a trunk space of an electric vehicle and is electrically connected to a vehicle battery, and thus an auxiliary power supply means other than the vehicle battery mounted in the electric vehicle may be further provided, thereby increasing the total battery capacity used for the vehicle and thus enabling the travel distance thereof to be dramatically increased.

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