An exemplary retention assembly includes a plurality of battery cells, a heat exchange structure, and a strap that pulls together the heat exchange structure and the plurality of battery cells.

A secondary battery may include a cell body member accommodating an electrode assembly therein; and a heat conductive member disposed between the cell body member and a cooling plate member to form a heat path for transferring heat from the cell body member, wherein the heat conductive member is in contact with the cooling plate member, and wherein a contact area of the cooling plate member and the heat conductive member is smaller than a cross-sectional area of the cell body member parallel to a thickness direction of the electrode assembly.

A jelly-roll type of electrode assembly in which a negative electrode sheet, a positive electrode sheet, and a separation membrane interposed between the negative electrode sheet and the positive electrode sheet are wound together is provided. The electrode assembly also includes: at least one electrode tab attached to the negative electrode sheet or the positive electrode sheet and at least a portion extending outside; and a heat radiation tape adhered to the electrode.The electrode tab to which the heat radiation tape is adhered is positioned between the center part of the wound electrode assembly and an external circumferential surface, or on the external circumferential surface, the heat radiation tape includes a heat diffusion layer, and the heat diffusion layer includes at least one of graphite and a metal foil.

A battery cell having an electrode assembly having a hollow structure with a hexagonal prism-shaped hole at a center, of which an exterior of the electrode assembly is in a shape of a hexagonal prism, and a cell case in which the electrode assembly is received, of which an exterior of the cell case is in a shape of a hexagonal prism is provided.

A battery cell having an electrode assembly having a hollow structure with a hexagonal prism-shaped hole at a center, of which an exterior of the electrode assembly is in a shape of a hexagonal prism, and a cell case in which the electrode assembly is received, of which an exterior of the cell case is in a shape of a hexagonal prism is provided.

The present disclosure relates to a battery module suitable for minimizing increase in overall volume due to increased capacity and simplifying the connection structure of the battery cells, by surrounding battery cells with a battery receiving unit and a battery cover as substitutes for cartridges. The battery module of the present disclosure includes a battery receiving unit including, within a receiving housing, a receiving groove and a receiving structure having a zigzag shape on a receiving sidewall and surrounding the receiving groove, battery cells partially received in the receiving groove and contacted with the receiving structure, and including electrode leads protruded from the receiving housing; and a battery cover including a seating groove formed within a seating housing and open to the receiving groove for seating the battery cells, and a seating structure having a zigzag shape on a seating sidewall surrounding the seating groove, in which the seating housing covers the receiving groove of the receiving housing and is penetrated with the electrode leads.

A thermal runaway shield (TRS) having at least one TRS module. The TRS module comprises a first wall, a second wall, and phenolic laminate inserts. The first wall has an exterior side and an interior side. The second wall has an exterior side and an interior side. The phenolic laminate inserts are disposed on the interior side of the first wall and on the interior side of the second wall. The first wall is coupled to the second wall forming an inner cavity. The at least one of the exterior side of the first wall and the exterior side of the second wall has a shape for conforming to a shape of at least one energy storage device cell.

A heater module is configured to be arranged on a side surface of a battery module and includes: a heat equalizing plate; a heater, a heater cover; and a metal stay in this order from the side surface of the battery module. The heater is fixed on the heat equalizing plate, the heater cover includes a heat equalizing plate holding portion and a stay holding portion, the metal stay includes: fastening portions provided on both end portions thereof in a stacking direction of cells and configured to be fastened to the side surface of the battery module; and a bent portion configured to cover a lower surface of the heater cover, and the bent portion of the metal stay is arranged at a location overlapping with the heat equalizing plate holding portion of the heater cover in the stacking direction.

A heater module is configured to be arranged on a side surface of a battery module and includes: a heat equalizing plate; a heater, a heater cover; and a metal stay in this order from the side surface of the battery module. The heater is fixed on the heat equalizing plate, the heater cover includes a heat equalizing plate holding portion and a stay holding portion, the metal stay includes: fastening portions provided on both end portions thereof in a stacking direction of cells and configured to be fastened to the side surface of the battery module; and a bent portion configured to cover a lower surface of the heater cover, and the bent portion of the metal stay is arranged at a location overlapping with the heat equalizing plate holding portion of the heater cover in the stacking direction.

An energy storage device comprising a container, a mandrel, at least one sheet of separator material, and two or more electrodes. The container comprises an inner surface. The mandrel comprises a mandrel surface, and is positioned within the container so that the mandrel surface is spaced apart from the inner surface to define a cavity within the container. The container has a packing axis that passes through the cavity, the mandrel surface, and the inner surface. The mandrel is compressible in the direction of the packing axis, the at least one sheet of separator material is arranged in the cavity to provide a plurality of separator layers along the packing axis, and an electrode is provided between the separator layers.