US 12,266,809 B2
Power supply device
Tomonori Sakamoto, Osaka Fu (JP); Akio Yamasaki, Osaka Fu (JP); Kazuhiro Kawamura, Hyogo Ken (JP); Koichi Sawada, Osaka Fu (JP); and Chifumi Murayama, Osaka Fu (JP)
Assigned to PANASONIC HOLDINGS CORPORATION, Osaka (JP); and PANASONIC ENERGY CO., LTD, Osaka (JP)
Appl. No. 17/430,860
Filed by Panasonic Corporation, Osaka (JP); and SANYO Electric Co., Ltd., Osaka (JP)
PCT Filed Feb. 7, 2020, PCT No. PCT/JP2020/004771
§ 371(c)(1), (2) Date Aug. 13, 2021,
PCT Pub. No. WO2020/166501, PCT Pub. Date Aug. 20, 2020.
Claims priority of application No. 2019-025557 (JP), filed on Feb. 15, 2019.
Prior Publication US 2022/0149468 A1, May 12, 2022
Int. Cl. H01M 50/209 (2021.01); H01M 50/204 (2021.01); H01M 50/227 (2021.01); H01M 50/298 (2021.01); H01M 50/317 (2021.01); H01M 50/367 (2021.01)
CPC H01M 50/209 (2021.01) [H01M 50/204 (2021.01); H01M 50/227 (2021.01); H01M 50/298 (2021.01); H01M 50/317 (2021.01); H01M 50/367 (2021.01)] 20 Claims
OG exemplary drawing
 
1. A power supply device comprising:
a plurality of batteries, each of the plurality of batteries including an exhaust valve configured to open if an internal pressure becomes higher than a predetermined pressure; and
an exterior case that accommodates the plurality of batteries and includes a collision-enhancing releasing path for releasing a gas discharged through the exhaust valve to an outside of the exterior case,
wherein the exterior case opens at an exhaust opening portion,
wherein the exterior case includes:
a battery accommodation area that accommodates a battery block including the plurality of batteries arranged in a predetermined place; and
a duct area that is arranged between the battery accommodation area and an end of the exterior case,
wherein the duct area includes the collision-enhancing releasing path in part, the duct area being configured to release the gas from the collision-enhancing releasing path to a space which is within the duct area and outside the collision-enhancing releasing path,
wherein the space is positioned between the collision-enhancing releasing path and the exhaust opening portion for communication between the collision-enhancing releasing path and the outside of the exterior case via the exhaust opening portion,
wherein the space has a larger volume than the collision-enhancing releasing path for reducing an energy of the gas released from the collision-enhancing releasing path to the space,
wherein the collision-enhancing releasing path includes:
a first collision plate configured to reflect a flow direction of the gas by collision of the gas against a surface of the first collision plate; and
a second collision plate that faces the first collision plate for: (i) collision of the gas against the first collision plate and the second collision plate; and (ii) release of the gas from the collision-enhancing releasing path to the space and the outside of the exterior case via the exhaust opening portion,
wherein the collision-enhancing releasing path is positioned at a corner of the space within the duct area, and
wherein the space is wider than the collision-enhancing releasing path in a transverse direction of the exterior case.