A battery module comprising: a voltage sensing assembly; a cell module stack having a structure in which a plurality of cell modules, each of which comprises a battery cell mounted in a cartridge, is vertically stacked; a lower end plate to support a lower end of the cell module stack; and an upper end plate to fix an uppermost cartridge of the cell module stack disposed on the lower end plate, wherein each of the cartridges is configured to have a rectangular structure corresponding to each of the battery cells such that the battery cell can be mounted in the cartridge and is provided at a central region thereof with a through hole, through which heat is dissipated, fastening holes, through which fastening members to fix the cell module stack are inserted, are formed in four corners of each of the cartridges, and a coupling part, to which an insulative mounting member to mount the voltage sensing assembly and bus bars is fastened in an assembly fashion such that the voltage sensing assembly is stably connected to the bus bars, is formed at a front of each of the cartridges, the voltage sensing assembly is to detect voltages of battery cells having electrode terminals formed at an upper end or a lower end thereof in a state in which the voltage sensing assembly is mounted to a battery module, the voltage sensing assembly comprising: (a) a block case, formed of an electrically insulative material, mounted to a front or rear of the battery module corresponding to electrode terminal connection parts of the battery cells; (b) conductive sensing parts connected to voltage sensing terminals located at one-side ends of bus bars electrically connected to the electrode terminal connection parts of the battery cells; and (c) a connector to transmit voltages sensed by the conductive sensing parts to a controller, wherein the block case comprises mounting grooves, opened to a front, formed at positions of the block case corresponding to the voltage sensing terminals of the bus bars such that the conductive sensing parts are mounted in the mounting grooves, and the conductive sensing parts are connected to the voltage sensing terminals of the bus bars in a state in which the conductive sensing parts are mounted in the mounting grooves of the block case. a voltage sensing assembly; a cell module stack having a structure in which a plurality of cell modules, each of which comprises a battery cell mounted in a cartridge, is vertically stacked; a lower end plate to support a lower end of the cell module stack; and an upper end plate to fix an uppermost cartridge of the cell module stack disposed on the lower end plate, wherein each of the cartridges is configured to have a rectangular structure corresponding to each of the battery cells such that the battery cell can be mounted in the cartridge and is provided at a central region thereof with a through hole, through which heat is dissipated, fastening holes, through which fastening members to fix the cell module stack are inserted, are formed in four corners of each of the cartridges, and a coupling part, to which an insulative mounting member to mount the voltage sensing assembly and bus bars is fastened in an assembly fashion such that the voltage sensing assembly is stably connected to the bus bars, is formed at a front of each of the cartridges, the voltage sensing assembly is to detect voltages of battery cells having electrode terminals formed at an upper end or a lower end thereof in a state in which the voltage sensing assembly is mounted to a battery module, the voltage sensing assembly comprising: (a) a block case, formed of an electrically insulative material, mounted to a front or rear of the battery module corresponding to electrode terminal connection parts of the battery cells; (b) conductive sensing parts connected to voltage sensing terminals located at one-side ends of bus bars electrically connected to the electrode terminal connection parts of the battery cells; and (c) a connector to transmit voltages sensed by the conductive sensing parts to a controller, wherein (a) a block case, formed of an electrically insulative material, mounted to a front or rear of the battery module corresponding to electrode terminal connection parts of the battery cells; (b) conductive sensing parts connected to voltage sensing terminals located at one-side ends of bus bars electrically connected to the electrode terminal connection parts of the battery cells; and (c) a connector to transmit voltages sensed by the conductive sensing parts to a controller, wherein the block case comprises mounting grooves, opened to a front, formed at positions of the block case corresponding to the voltage sensing terminals of the bus bars such that the conductive sensing parts are mounted in the mounting grooves, and the conductive sensing parts are connected to the voltage sensing terminals of the bus bars in a state in which the conductive sensing parts are mounted in the mounting grooves of the block case.