A battery module, characterized in that, comprising: a case having a hollow cavity and an opening in communication with the hollow cavity in a length direction; a secondary battery assembly disposed in the hollow cavity and comprising two or more secondary batteries stacked one on another in a width direction; and a shielding member disposed on at least one side of the secondary battery assembly in a height direction and located between the secondary battery assembly and the case; wherein the case has a first plate and a second plate disposed opposite to each other in the height direction, and the shielding member is located between the first plate and the secondary battery assembly; the battery module further comprises a heat conduction member disposed between the second plate and the secondary battery assembly; and the heat conduction member is a thermal conductive adhesive, and the second plate is provided with an adhesive injection hole which penetrates the second plate in the height direction and is adapted for injecting the adhesive in a liquid state into the hollow cavity, the shielding member is configured to cover the secondary battery assembly and slidably connected to the case, one of the shielding member and the case is provided with a guide groove, the other is provided with a slide block slidably engaged with the guide groove, both the guide groove and the slide block are configured to extend in the length direction, the guide groove is disposed on a surface of the case facing the secondary battery assembly and is configured to extend across the entire case in the length direction, and the slide block is located on a surface of the shielding member facing the case and has a length the same as that of the shielding member in the length direction. a case having a hollow cavity and an opening in communication with the hollow cavity in a length direction; a secondary battery assembly disposed in the hollow cavity and comprising two or more secondary batteries stacked one on another in a width direction; and a shielding member disposed on at least one side of the secondary battery assembly in a height direction and located between the secondary battery assembly and the case; wherein the case has a first plate and a second plate disposed opposite to each other in the height direction, and the shielding member is located between the first plate and the secondary battery assembly; the battery module further comprises a heat conduction member disposed between the second plate and the secondary battery assembly; and the heat conduction member is a thermal conductive adhesive, and the second plate is provided with an adhesive injection hole which penetrates the second plate in the height direction and is adapted for injecting the adhesive in a liquid state into the hollow cavity, the shielding member is configured to cover the secondary battery assembly and slidably connected to the case, one of the shielding member and the case is provided with a guide groove, the other is provided with a slide block slidably engaged with the guide groove, both the guide groove and the slide block are configured to extend in the length direction, the guide groove is disposed on a surface of the case facing the secondary battery assembly and is configured to extend across the entire case in the length direction, and the slide block is located on a surface of the shielding member facing the case and has a length the same as that of the shielding member in the length direction.