US Patent 9350003 Battery module with fixing and burglarproof functions

A battery module for an electric vehicle includes an external case, a battery box, a fixing mechanism, and a rotatable pull tab. The external case is fixed in the electric vehicle, and includes an accommodation space and a first fixing part. The battery box is detachably installed in the accommodation space. The fixing mechanism is disposed on the battery box. When the battery box is installed in the accommodation space, the fixing mechanism engages or disengages the first fixing part to selectively lock or unlock the battery box. When the battery box is locked, the battery box is securely fixed in the accommodation space. When the battery box is unlocked, the battery box is removable from the accommodation space. The rotatable pull tab is detachably inserted into the fixing mechanism. By rotating the rotatable pull tab the battery box is selectively locked or unlocked.