Cell assembly, cell sub-module, energy storage module and method for assembling the same

A cell sub-module comprising at least two cell assemblies each of the at least two cell assemblies comprising:

• a cell frame, a thermal plate being integrated into the cell frame;
• a lithium-ion pouch cell comprising a positive cell terminal and a negative cell terminal, the positive and negative cell terminals having a substantially planar shape and being arranged at a top side of the pouch cell, and the positive and negative cell terminals extending at least substantially perpendicular from the top side of the pouch cell;
• a compression element;
• the cell frame being configured to receive and house the pouch cell and the compression element in a space defined by the thermal plate and the cell frame;
• and
• the at least two cell assemblies are stacked such that the thermal plate of a first cell assembly contacts the compression element of an adjacent cell assembly, and such that the respective positive and negative cell terminals of each cell assembly are arranged on a first side of the cell sub-module and form a respective positive and negative cell terminal stack.

An energy storage module comprising:

• a housing;
• a plurality of cell sub-modules arranged in the housing, each cell sub-module comprising at least two cell assemblies, each of the at least two cell assemblies comprising:
• a cell frame, a thermal plate being integrated into the cell frame;
• a lithium-ion pouch cell comprising a positive cell terminal and a negative cell terminal, the positive and negative cell terminals having a substantially planar shape and being arranged at a top side of the pouch cell, and the positive and negative cell terminals extending at least substantially perpendicular from the top side of the pouch cell;
• a compression element;
• the cell frame being configured to receive and house the pouch cell and the compression element in a space defined by the thermal plate and the cell frame;
• and
• the at least two cell assemblies are stacked such that the thermal plate of a first cell assembly contacts the compression element of an adjacent cell assembly, and such that the respective positive and negative cell terminals of each cell assembly are arranged on a first side of the cell sub-module and form a respective positive and negative cell terminal stack;
• and
• the housing comprises a plurality of cavities, each cavity configured to receive a corresponding one of the plurality of cell sub-modules, the cavities being defined by one of:
• one wall of the housing and an internal partition of the housing;
• and
• at least two internal partitions of the housing.