The disclosure relates to a battery lower casing and a battery system. The battery lower casing comprises: a support frame comprising a plurality of fixing beams that are connected end to end to form an accommodating space, wherein each of two fixing beams opposite to each other comprises a fixing portion extending toward the accommodating space, each of the fixing beams comprises fixing tabs at a side of the fixing beam away from the accommodating space, and the battery lower casing is connected to a target object through the fixing tabs; and a bottom plate connected to the fixing beams.

The present disclosure provides a battery module including a center cartridge assembly, on which a plurality of battery cells are arrayed and seated, including a cooling plate inner installed therein and configured to cool a part of each of the battery cells, a side cooling cover assembly which is coupled to two sides of the center cartridge assembly to protect the battery cells seated on the center cartridge assembly and includes a cooling plate outer attached thereto and configured to cool a part of each of the battery cells, and a busbar housing assembly which is coupled to an upper portion of the center cartridge assembly and includes one or more output busbars installed thereon and configured to be electrically connected to an electrode exposed at an upper portion of each of the battery cells.

A battery module includes a cell stack in which a plurality of unit cells including terminal parts are aligned in a first direction and an insulating member surrounds the plurality of unit cells; and a module housing in which a plurality of receiving parts, into each of which the cell stack is configured to be inserted, are provided and are aligned in a first direction and a second direction perpendicular to the first direction, wherein each of the plurality of receiving parts includes a fixing wall around the cell stack and having at least a portion which is in contact with the cell stack. The cell stacks adjacent to each other in the second direction are electrically connected to each other, and the cell stacks adjacent to each other in the first direction are electrically disconnected from each other, when not connected to an end module.

A battery module includes a cell stack in which a plurality of unit cells including terminal parts are aligned in a first direction and an insulating member surrounds the plurality of unit cells; and a module housing in which a plurality of receiving parts, into each of which the cell stack is configured to be inserted, are provided and are aligned in a first direction and a second direction perpendicular to the first direction, wherein each of the plurality of receiving parts includes a fixing wall around the cell stack and having at least a portion which is in contact with the cell stack. The cell stacks adjacent to each other in the second direction are electrically connected to each other, and the cell stacks adjacent to each other in the first direction are electrically disconnected from each other, when not connected to an end module.

The present utility model discloses a battery pack and an energy storage device. The battery pack includes at least two battery modules and at least one cooling assembly. Each battery module includes a support having a splicing portion and a plurality of battery cells mounted in the support, and two adjacent battery modules are connected to each other by two splicing portions. The at least one cooling assembly is sandwiched between the two adjacent battery modules and is in contact with the battery cells located on opposite sides of the at least one cooling assembly. According to the battery pack, the battery modules and the cooling assembly can be spliced as needed, then battery packs with different numbers of battery cells can be conveniently achieved, and the cost of the battery pack is reduced.

The present utility model discloses a battery pack and an energy storage device. The battery pack includes at least two battery modules and at least one cooling assembly. Each battery module includes a support having a splicing portion and a plurality of battery cells mounted in the support, and two adjacent battery modules are connected to each other by two splicing portions. The at least one cooling assembly is sandwiched between the two adjacent battery modules and is in contact with the battery cells located on opposite sides of the at least one cooling assembly. According to the battery pack, the battery modules and the cooling assembly can be spliced as needed, then battery packs with different numbers of battery cells can be conveniently achieved, and the cost of the battery pack is reduced.

A bus bar holder for a battery module is provided. The bus bar holder includes: a body having a plurality of bus bar disposal area portions; and a hinge portion between the plurality of bus bar disposal area portions and configured to enable stacking of the plurality of bus bar disposal area portions.

A bus bar holder for a battery module is provided. The bus bar holder includes: a body having a plurality of bus bar disposal area portions; and a hinge portion between the plurality of bus bar disposal area portions and configured to enable stacking of the plurality of bus bar disposal area portions.

A battery module comprising a plurality of battery cells having two opposite ends, a first busbar assembly comprising at least a first busbar coupled with a first busbar frame, and a second busbar assembly comprising at least a second busbar coupled with a second busbar frame configured to electrically couple the battery cells, and a main frame having side walls forming a housing and a middle wall inside the housing dividing an inner space of the housing in a vertical direction to a first and a second section, wherein the middle wall comprises a plurality of holes for receiving the battery cells such that one end of battery cell is in the first section and another end is in the second section, and wherein the middle wall further comprises a plurality fastening members for fastening the first busbar assembly to the main frame in the first section and the second busbar assembly to the main frame in the second section such that the battery cells are arranged between the first and the second busbar assemblies which couple the battery cells to the battery module.

A battery module comprising a plurality of battery cells having two opposite ends, a first busbar assembly comprising at least a first busbar coupled with a first busbar frame, and a second busbar assembly comprising at least a second busbar coupled with a second busbar frame configured to electrically couple the battery cells, and a main frame having side walls forming a housing and a middle wall inside the housing dividing an inner space of the housing in a vertical direction to a first and a second section, wherein the middle wall comprises a plurality of holes for receiving the battery cells such that one end of battery cell is in the first section and another end is in the second section, and wherein the middle wall further comprises a plurality fastening members for fastening the first busbar assembly to the main frame in the first section and the second busbar assembly to the main frame in the second section such that the battery cells are arranged between the first and the second busbar assemblies which couple the battery cells to the battery module.