A battery module (100; 200) including two or more of rechargeable battery cells (101; 201, 202, 203, 204, 205), comprising: a sensing probe (110; 210, 211) provided at an external surface of at least one of the battery cells (101; 201, 202, 203, 204, 205) to sense a local expansion change of the battery cell (101; 201, 202, 203, 204, 205) and transmitting a signal; and a controller (190; 290) receiving the signal from the sensing probe (110; 210, 211), estimating an internal pressure of the battery cell (101; 201, 202, 203, 204, 205) from the received signal, and generating a warning signal to assure safety of the battery module (100; 200) when the estimated internal pressure exceeds a threshold pressure level, wherein a battery case of the battery cell is a pouch-type battery case made of a laminated sheet Including a resin layer (120A, 120C) and a metal layer, and an external circumferential side (121a, 121b, 121c, 121d) of a receiving portion of an electrode assembly Is closed and sealed while the electrode assembly and an electrolyte are received In the receiving portion, wherein the receiving portion is disposed in a portion that is concave in the pouch-type battery case for embedding of the electrode assembly, wherein the electrode assembly has a shape of a hexahedron of which top and bottom sides are relatively large, the receiving portion is recessed to a depth corresponding to a height of the electrode assembly, and a side surface that provides a depth of the receiving portion is disposed between the bottom and the external circumference sides (121a, 121b, 121c, 121d) that are provided for thermal welding of the receiving portion, wherein the sensing probe is provided to contact an outer side of a side surface where an electrode terminal of the battery cell is provided among the side surfaces of the receiving portion, and wherein the side surface of the receiving portion is inclined at an angle of 45 degrees to 85 degrees with reference to the ground. a sensing probe (110; 210, 211) provided at an external surface of at least one of the battery cells (101; 201, 202, 203, 204, 205) to sense a local expansion change of the battery cell (101; 201, 202, 203, 204, 205) and transmitting a signal; and a controller (190; 290) receiving the signal from the sensing probe (110; 210, 211), estimating an internal pressure of the battery cell (101; 201, 202, 203, 204, 205) from the received signal, and generating a warning signal to assure safety of the battery module (100; 200) when the estimated internal pressure exceeds a threshold pressure level, wherein a battery case of the battery cell is a pouch-type battery case made of a laminated sheet Including a resin layer (120A, 120C) and a metal layer, and an external circumferential side (121a, 121b, 121c, 121d) of a receiving portion of an electrode assembly Is closed and sealed while the electrode assembly and an electrolyte are received In the receiving portion, wherein the receiving portion is disposed in a portion that is concave in the pouch-type battery case for embedding of the electrode assembly, wherein the electrode assembly has a shape of a hexahedron of which top and bottom sides are relatively large, the receiving portion is recessed to a depth corresponding to a height of the electrode assembly, and a side surface that provides a depth of the receiving portion is disposed between the bottom and the external circumference sides (121a, 121b, 121c, 121d) that are provided for thermal welding of the receiving portion, wherein the sensing probe is provided to contact an outer side of a side surface where an electrode terminal of the battery cell is provided among the side surfaces of the receiving portion, and wherein the side surface of the receiving portion is inclined at an angle of 45 degrees to 85 degrees with reference to the ground.