US 12,283,709 B2
Venting device for secondary batteries and pouch-shaped secondary battery including the same
In Sun Yoo, Daejeon (KR); Do Hyeon Kim, Daejeon (KR); and Young Soo Oh, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Filed by LG Energy Solution, Ltd., Seoul (KR)
Filed on Jan. 25, 2022, as Appl. No. 17/583,491.
Claims priority of application No. 10-2021-0010426 (KR), filed on Jan. 25, 2021.
Prior Publication US 2022/0238954 A1, Jul. 28, 2022
Int. Cl. H01M 50/333 (2021.01)
CPC H01M 50/333 (2021.01) 16 Claims
OG exemplary drawing
 
1. A venting device for a secondary battery, comprising:
a lower vent portion positionable within a receiving portion of a battery case, the lower vent portion defining a cavity therein;
an inner fixing portion having an opening defined therethrough is located in the cavity of the lower vent portion;
an upper vent portion extending upwardly from the cavity of the lower vent portion, the upper vent portion being positionable outside of the battery case;
a wing portion encircling an outer perimeter of the upper vent portion, the wing portion being positionable along a sealed portion of the battery case;
a discharge portion communicating with the upper vent portion to allow gas to pass from the upper vent portion through the discharge portion; and
a shaft unit located in the cavity of the lower vent portion, wherein the shaft unit comprises:
an elastic portion,
a shaft body having a main passage defined therein; and
a guide passage extending horizontally and communicating with the main passage,
wherein the main passage of the shaft unit is sealed off from the upper vent portion when the shaft unit is in a first position, such that gas is restricted from flowing between the main passage and the upper vent portion,
wherein the main passage of the shaft unit is in communication with the upper vent portion via the guide passage when the shaft unit is in a second position, such that gas can flow from the main passage to the upper vent portion, and
wherein the shaft unit is selectively movable between the first and the second positions and is biased toward the first position.