A busbar assembly comprises an elongated support structure with a bottom, two side walls, extending in a length direction (L) along longitudinal sides, two spaced-apart central ridges extending in the length direction (L), a signal line, connected to the support structure between the central ridges, conductor members positioned between the side walls and an adjacent central ridge, adapted for interconnecting terminals of battery cells that are adjacent when seen in the length direction (L). The sidewalls and the ridges each extend at a cover side of the bottom and define top adhesive surface strips with respective widths Ws, Wc, the strips being situated in a connecting plane and adapted for adhesive connection to a top plate of a battery pack casing.

A member-joined structure includes: a first member, and a second member having a shape of plate, the second member including an overlapping portion that overlaps with the first member and a protruding portion that protrudes from the overlapping portion along a first direction. In the overlapping portion, a joined portion in which the first member and the second member are joined to each other by welding or fusing is formed. The joined portion is provided with a notch portion located opposite to the protruding portion.

A member-joined structure includes: a first member, and a second member having a shape of plate, the second member including an overlapping portion that overlaps with the first member and a protruding portion that protrudes from the overlapping portion along a first direction. In the overlapping portion, a joined portion in which the first member and the second member are joined to each other by welding or fusing is formed. The joined portion is provided with a notch portion located opposite to the protruding portion.

A battery pack includes a pack housing, and at least one battery assembly accommodated in the pack housing. The battery assembly includes a first cell stack and a second cell stack in each of which a plurality of battery cells are stacked, and a busbar assembly electrically connecting the plurality of battery cells to each other. The busbar assembly includes a first coupling portion coupled to the first cell stack, a second coupling portion coupled to the second cell stack, and a connection portion connecting the first coupling portion and the second coupling portion to each other.

A battery pack includes a pack housing, and at least one battery assembly accommodated in the pack housing. The battery assembly includes a first cell stack and a second cell stack in each of which a plurality of battery cells are stacked, and a busbar assembly electrically connecting the plurality of battery cells to each other. The busbar assembly includes a first coupling portion coupled to the first cell stack, a second coupling portion coupled to the second cell stack, and a connection portion connecting the first coupling portion and the second coupling portion to each other.

A battery module includes a cell assembly including a plurality of battery cells, and a module housing having an arrangement space for accommodating the cell assembly and a cover plate covering a top surface of the cell assembly. The cover plate has at least one discharge hole for discharging gas generated in the cell assembly. A blocking member is disposed between the top surface of the cell assembly and the cover plate to block flame or a combustion material from being discharged externally of the module housing through the discharge hole.

A battery module includes a cell assembly including a plurality of battery cells, and a module housing having an arrangement space for accommodating the cell assembly and a cover plate covering a top surface of the cell assembly. The cover plate has at least one discharge hole for discharging gas generated in the cell assembly. A blocking member is disposed between the top surface of the cell assembly and the cover plate to block flame or a combustion material from being discharged externally of the module housing through the discharge hole.

An electrochemical cell includes a housing defining an interior space of the electrochemical cell; and a lid disposed on a first face of the electrochemical cell defined by a length and a thickness of the housing. A dimension of the housing extending perpendicular to the first face of the electrochemical cell is a height of the housing, and the length of the housing is greater than the height of the housing. An anode and a cathode are disposed in the interior space of the electrochemical cell, and at least one of the anode or the cathode is connected to the lid.

An electrochemical cell includes a housing defining an interior space of the electrochemical cell; and a lid disposed on a first face of the electrochemical cell defined by a length and a thickness of the housing. A dimension of the housing extending perpendicular to the first face of the electrochemical cell is a height of the housing, and the length of the housing is greater than the height of the housing. An anode and a cathode are disposed in the interior space of the electrochemical cell, and at least one of the anode or the cathode is connected to the lid.

An interconnect board (ICB) assembly suitable for a battery module of horizontal stack structure including unidirectional battery cells stacked with cell leads facing each other includes an ICB frame in which cell leads of unidirectional battery cells are configured to be received such that the unidirectional battery cells having the cell leads at one end are configured to be placed facing each other with the cell leads facing each other, and busbars formed in the ICB frame and configured to be electrically connected to the cell leads, wherein the ICB frame is configured to be connected to another ICB frame with a hinge structure in a lengthwise direction of the ICB frame. A battery module including the ICB assembly and a method for fabricating the battery module are also provided.