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 and a metal layer , and an external circumferential side 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 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 and a metal layer , and an external circumferential side 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 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. <EOS>