A battery module according to embodiments of the present disclosure includes: a battery cell stack in which a plurality of battery cells are stacked, a module frame that is formed into a bowl type of a bottom surface and front, rear, left and right surfaces and houses the battery cell stack; and an upper plate that covers the upper side of the battery cell stack and is coupled to the module frame, wherein the module frame comprises a bottom part, front and rear plates, and left and right plates, wherein the bottom part, the front and rear plates, and the left and right plates are integrally formed, and wherein a recessed part is formed at a portion where a bottom edge connected to the front and rear plates meet with a bottom edge connected to the left and right plates.

A battery module according to embodiments of the present disclosure includes: a battery cell stack in which a plurality of battery cells are stacked, a module frame that is formed into a bowl type of a bottom surface and front, rear, left and right surfaces and houses the battery cell stack; and an upper plate that covers the upper side of the battery cell stack and is coupled to the module frame, wherein the module frame comprises a bottom part, front and rear plates, and left and right plates, wherein the bottom part, the front and rear plates, and the left and right plates are integrally formed, and wherein a recessed part is formed at a portion where a bottom edge connected to the front and rear plates meet with a bottom edge connected to the left and right plates.

A battery apparatus includes: a plurality of battery cells; a battery management system (BMS) for managing the plurality of battery cells; and a connection controller for sequentially connecting the plurality of battery cells to the BMS, and the connection controller connects a corresponding battery cell to the BMS according to a potential of a lower battery cell and a potential of the corresponding battery cell.

A battery apparatus includes: a plurality of battery cells; a battery management system (BMS) for managing the plurality of battery cells; and a connection controller for sequentially connecting the plurality of battery cells to the BMS, and the connection controller connects a corresponding battery cell to the BMS according to a potential of a lower battery cell and a potential of the corresponding battery cell.

A battery pack has improved safety against external impacts, and an energy storage system and a vehicle including the same. The battery pack includes a battery module having at least one battery cell; a tray having a plate shape so that the battery module is mounted thereon; a reinforcing member having a plate shape and mounted on the tray, the reinforcing member having at least a portion coupled to the tray and the other portion supporting the battery module upward, the reinforcing member being configured to form a space separated from the tray below the other portion supporting the battery module; and an elastic member constrained in the separated space in an elastically deformed state and configured to press a lower surface of the reinforcing member upward.

A battery pack has improved safety against external impacts, and an energy storage system and a vehicle including the same. The battery pack includes a battery module having at least one battery cell; a tray having a plate shape so that the battery module is mounted thereon; a reinforcing member having a plate shape and mounted on the tray, the reinforcing member having at least a portion coupled to the tray and the other portion supporting the battery module upward, the reinforcing member being configured to form a space separated from the tray below the other portion supporting the battery module; and an elastic member constrained in the separated space in an elastically deformed state and configured to press a lower surface of the reinforcing member upward.

A battery tray and a vehicle include a frame structure including a plurality of frames sequentially connected end to end arranged to be connected to the vehicle, and a base plate structure including an inner base plate and a reinforcing beam, wherein the inner base plate is located on an inner side of the reinforcing beam and arranged for mounting a battery module. The battery tray further includes a reinforcing block, wherein the reinforcing block is connected to a corresponding frame and the reinforcing beam in a matching mode, so as to fixedly connect the reinforcing beam to the frame structure through the reinforcing block. In the battery tray, the strength of the battery tray can be enhanced and a total weight can be decreased only by using the reinforcing block to fixedly connect the reinforcing beam to the frame structure.

A battery tray and a vehicle include a frame structure including a plurality of frames sequentially connected end to end arranged to be connected to the vehicle, and a base plate structure including an inner base plate and a reinforcing beam, wherein the inner base plate is located on an inner side of the reinforcing beam and arranged for mounting a battery module. The battery tray further includes a reinforcing block, wherein the reinforcing block is connected to a corresponding frame and the reinforcing beam in a matching mode, so as to fixedly connect the reinforcing beam to the frame structure through the reinforcing block. In the battery tray, the strength of the battery tray can be enhanced and a total weight can be decreased only by using the reinforcing block to fixedly connect the reinforcing beam to the frame structure.

A battery pack including a plurality of battery cells arranged along a first direction; a holder, the holder including terminal holes exposing terminals of the battery cells, and pairs of first plates separated from each other between adjacent terminal holes and pairs of elastic pieces that are bent from the pairs of first plates in opposite directions along the first direction; and bus bars, each of the bus bars including coupling portions at opposite sides thereof and coupled to adjacent terminal holes, and a central bent portion connecting the coupling portions and extending around corresponding pairs of elastic pieces to surround the corresponding pairs of elastic pieces.

A battery pack including a plurality of battery cells arranged along a first direction; a holder, the holder including terminal holes exposing terminals of the battery cells, and pairs of first plates separated from each other between adjacent terminal holes and pairs of elastic pieces that are bent from the pairs of first plates in opposite directions along the first direction; and bus bars, each of the bus bars including coupling portions at opposite sides thereof and coupled to adjacent terminal holes, and a central bent portion connecting the coupling portions and extending around corresponding pairs of elastic pieces to surround the corresponding pairs of elastic pieces.