A battery pack includes a plurality of battery modules including battery cells; a pack frame accommodating the battery modules; a pack refrigerant pipe assembly connected to the battery module; and a pack refrigerant pipe housing accommodating the pack refrigerant pipe assembly.

A battery module includes a battery cell stack in which a plurality of battery cells are stacked; a module frame accommodating the battery cell stack; an end plate positioned on a front surface and a rear surface of the battery cell stack; and a heat sink positioned under a bottom portion of the module frame. The bottom portion constitutes the upper plate of the heat sink. The module frame includes a first module frame protruded part and a second module frame protruded part formed by protruding a part of the bottom portion, and the first module frame protruded part and the second module frame protruded part are positioned to be spaced apart from each other. A welding part where the end plate and the module frame are welded is positioned between the first module frame protruded part and the second module frame protruded part.

A battery module includes a battery cell stack in which a plurality of battery cells are stacked; a module frame accommodating the battery cell stack; an end plate positioned on a front surface and a rear surface of the battery cell stack; and a heat sink positioned under a bottom portion of the module frame. The bottom portion constitutes the upper plate of the heat sink. The module frame includes a first module frame protruded part and a second module frame protruded part formed by protruding a part of the bottom portion, and the first module frame protruded part and the second module frame protruded part are positioned to be spaced apart from each other. A welding part where the end plate and the module frame are welded is positioned between the first module frame protruded part and the second module frame protruded part.

A battery pack includes a plurality of battery modules; a pack refrigerant tube assembly disposed between the battery modules facing each other among the plurality of battery modules; a pack refrigerant tube lower cover for covering the lower part of the pack refrigerant tube assembly; a module tray located at the lower side of the pack refrigerant tube lower cover; and a lower housing located at the lower side of the module tray. A lower cover opening is formed in the pack refrigerant tube lower cover, and the lower cover opening is connected to a space formed between the module tray and the lower housing.

A battery contact member allows a high-voltage battery and a cooling device to be evenly in contact with each other. The battery contact member includes an insulating member vertically disposed in the battery housing and having one surface to which the cooling block is coupled in a fitting manner, and a plurality of elastic members each having one surface coupled to the insulating member in a direction toward the other surface of the insulating member, each of the plurality of elastic members having the other surface in contact with an inner surface of the battery housing, and configured to elastically press the insulating member toward the cooling block.

A battery contact member allows a high-voltage battery and a cooling device to be evenly in contact with each other. The battery contact member includes an insulating member vertically disposed in the battery housing and having one surface to which the cooling block is coupled in a fitting manner, and a plurality of elastic members each having one surface coupled to the insulating member in a direction toward the other surface of the insulating member, each of the plurality of elastic members having the other surface in contact with an inner surface of the battery housing, and configured to elastically press the insulating member toward the cooling block.

A battery module having excellent cooling efficiency and allowing easy recycling of inner components at disposal applies a heat-shrinkable tube serving as a module housing and a heatsink to the battery module. The battery module includes a cell assembly including a plurality of pouch-type secondary batteries having electrode leads formed to protrude in a front and rear direction and stacked on each other in a left and right direction; a heatsink located to contact an outer surface of the cell assembly and having a coolant flow path for allowing a coolant to move therein; and a heat-shrinkable tube having a tubular shape with a hollow structure in which the cell assembly and the heatsink are located, the heat-shrinkable tube being thermally shrunken so that the cell assembly and the heatsink are in contact with each other.

A temperature detection element is allowed to more accurately detect a temperature of a battery pack. A battery pack includes: a battery cell; a temperature detection element; and a thermally conductive member transferring heat of the battery cell to the temperature detection element.

A temperature detection element is allowed to more accurately detect a temperature of a battery pack. A battery pack includes: a battery cell; a temperature detection element; and a thermally conductive member transferring heat of the battery cell to the temperature detection element.

A nonaqueous electrolyte secondary battery includes a positive electrode including a positive electrode collector, a positive electrode active material layer on part of the surface of the positive electrode collector, and an insulating layer on another part of the surface of the positive electrode collector; a negative electrode including a negative electrode collector; and a negative electrode active material layer on part of the surface of the negative electrode collector; a separator that insulates the positive and negative electrodes; and a nonaqueous electrolyte. A width of the negative electrode active material layer is wider than the positive electrode active material layer. The insulating layer protrudes from the negative electrode active material layer; and exhibits a thermal shrinkage factor of 13% or less in a direction parallel to the surface of a square insulating layer sample having a side length of 5 cm and heated at 150° C. for 1 hour.