A battery module according to an embodiment of the present invention includes: a battery cell laminated body in which a plurality of battery cells each including an electrode assembly are stacked; a U-shaped frame that accommodates the battery cell laminated body and has an opened upper part;

and an upper plate covering the battery cell laminated body on the opened U-shaped frame, wherein the U-shaped frame includes a bottom part and two side parts facing each other, the side part includes a depressed part that is depressed inward toward the battery cell laminated body, and the area of the depressed part is equal to or larger than the area of the electrode assembly.

Disclosed is a battery module, which includes a plurality of battery cells stacked on each other, and a plurality of adhesive sheets respectively provided between the plurality of battery cells and configured to generate an adhesion force after the plurality of battery cells are aligned.

A battery pack includes at least one cell assembly including a plurality of secondary batteries stacked in a direction, a module housing having an internal space in which the at least one cell assembly is received, and a spacer member interposed between the plurality of secondary batteries, and configured to press the plurality of secondary batteries in two directions to space the plurality of secondary batteries apart when a temperature of at least one of the plurality of secondary batteries is equal to or higher than a predetermined temperature.

A battery pack includes at least one cell assembly including a plurality of secondary batteries stacked in a direction, a module housing having an internal space in which the at least one cell assembly is received, and a spacer member interposed between the plurality of secondary batteries, and configured to press the plurality of secondary batteries in two directions to space the plurality of secondary batteries apart when a temperature of at least one of the plurality of secondary batteries is equal to or higher than a predetermined temperature.

A main object of the present disclosure is to provide a battery module capable of restraining heat conductivity among battery cells in rising temperature. The present disclosure achieves the object by providing a battery module including a plurality of a battery cell arranged along with a thickness direction, the battery module including: an elastic member between the battery cell neighboring; a thermally expandable resin composition body is arranged in the elastic member; in a plan view along with the thickness direction, the resin composition body is arranged to include a center of the battery cell; a temperature at which the resin composition body starts to expand is 80° C. or more; and heat conductivity after expansion of the resin composition body is 0.5 W/m.Math.K or less.

A main object of the present disclosure is to provide a battery module capable of restraining heat conductivity among battery cells in rising temperature. The present disclosure achieves the object by providing a battery module including a plurality of a battery cell arranged along with a thickness direction, the battery module including: an elastic member between the battery cell neighboring; a thermally expandable resin composition body is arranged in the elastic member; in a plan view along with the thickness direction, the resin composition body is arranged to include a center of the battery cell; a temperature at which the resin composition body starts to expand is 80° C. or more; and heat conductivity after expansion of the resin composition body is 0.5 W/m.Math.K or less.

A power supply device includes a battery block in which a plurality of battery cells (1) is stacked in a thickness with separator (2) clamped therebetween, a pair of end plates disposed on opposing end faces of the battery block, and a binding bar coupled to the pair of end plates and fixing the battery block in a compressed state via the end plates, in order to absorb expansion of the battery cells with the separator and suppress degradation of the separator in a state of being heated by the battery cells. Separator (2) has a three-layer structure including viscoelastic elastic sheet (6) that absorbs expansion of battery cell (1) and heat-insulating sheets (5) laminated on opposing surfaces of elastic sheet (6), and heat-insulating sheet (5) is hybrid material (5A) of an inorganic powder and a fibrous reinforcing material.

A power supply device includes a battery block in which a plurality of battery cells (1) is stacked in a thickness with separator (2) clamped therebetween, a pair of end plates disposed on opposing end faces of the battery block, and a binding bar coupled to the pair of end plates and fixing the battery block in a compressed state via the end plates, in order to absorb expansion of the battery cells with the separator and suppress degradation of the separator in a state of being heated by the battery cells. Separator (2) has a three-layer structure including viscoelastic elastic sheet (6) that absorbs expansion of battery cell (1) and heat-insulating sheets (5) laminated on opposing surfaces of elastic sheet (6), and heat-insulating sheet (5) is hybrid material (5A) of an inorganic powder and a fibrous reinforcing material.

A rechargeable battery pack, which has: a thin compact layer or skin (9) of matrix (4) on the surfaces of contact of the latter with the outer walls (8a) of the batteries (2) and the inner walls (8b) of the container (3), which promotes the heat dissipation from the batteries to the outside of the battery pack (1); and portions (10) of foamed or expanded matrix (4), which fill the empty spaces between the batteries and the walls of the container and which are suitable for reducing the total weight of the battery pack (1) compared with a compact non-foamed matrix.

In comparison with the prior art embodiments, the invention allows a rechargeable battery pack to be produced that combines a lower weight with the thermal conductivity values required to dispose of the heat generated in the battery recharge phase.

A rechargeable battery pack, which has: a thin compact layer or skin (9) of matrix (4) on the surfaces of contact of the latter with the outer walls (8a) of the batteries (2) and the inner walls (8b) of the container (3), which promotes the heat dissipation from the batteries to the outside of the battery pack (1); and portions (10) of foamed or expanded matrix (4), which fill the empty spaces between the batteries and the walls of the container and which are suitable for reducing the total weight of the battery pack (1) compared with a compact non-foamed matrix.

In comparison with the prior art embodiments, the invention allows a rechargeable battery pack to be produced that combines a lower weight with the thermal conductivity values required to dispose of the heat generated in the battery recharge phase.