GAS VENTING DEVICE, AND BATTERY MODULE AND BATTERY PACK INCLUDING SAME

Disclosed herein relates to a gas venting device, and a battery module and a battery pack including the same, in which, by reducing and increasing the cross-sectional area of a flow path according to the gas discharge direction, a larger flow rate of gas can be discharged even when using a venting disk of the same area.In addition, a venting disk can be installed on the outlet side of the gas discharge flow path to achieve effects such as protecting internal components, and the like.