Battery cell and battery module comprising the same

A battery cell comprising:

• a case;
• an electrode assembly including a positive electrode, a negative electrode, and a separator, accommodated in the case;
• and
• at least one venting guide member having a guide groove therein into which a sealing portion of the case is at least partially inserted, and pressing the case to delay opening of the case,
• wherein the sealing portion of the case is formed by overlapping and heat sealing of both surfaces of the case, and
• wherein the electrode assembly further comprises:
• a positive electrode tab connected to the positive electrode and drawn out of the case in one direction;
• and
• a negative electrode tab connected to the negative electrode and drawn out of the case in a direction different from the one direction of the positive electrode tab,
• wherein the sealing portion of the case comprises:
• a first sealing portion formed on a surface of the case from which the positive electrode tab is drawn out, the first sealing portion having different bonding forces between a region facing the positive electrode tab and a region not facing the positive electrode tab;
• a second sealing portion formed on a surface of the case from which the negative electrode tab is drawn out, the second sealing portion having different bonding forces between a region facing the negative electrode tab and a region not facing the negative electrode tab,
• wherein the at least one venting guide member reinforces and presses at least one of a region of the first sealing portion having a relatively weaker bonding force and a region of the second sealing portion having a relatively weaker bonding force.