Battery

Patent metadata

Field	Value
Publication number	US-2021257696-A1
Application number	US-201915733809-A
Country	US
Kind code	A1
Filing date	May 28, 2019
Priority date	May 28, 2018
Publication date	Aug 19, 2021
Grant date	—

Abstract

A battery includes a battery element, housing body, and valve device. The housing body includes at least one laminate and an interior space wherein the battery element is housed, a first housing portion covers the interior space from a first side in a thickness direction, and a second housing portion that covers the interior space from a second side opposite to the first side in the thickness direction. The valve device attaches to the housing body and makes the interior space communicate with an external space. A joined edge portion is formed in the housing body by the first and second housing portion being fused along respective peripheral edges. The valve device is between the first and second housing portion in the joined edge portion, and an inner end of the valve device protrudes from an inner edge of the joined edge portion toward the interior space.

First claim

1 - 15 . (canceled)

16 . A battery comprising:
a battery element; a housing body; and a valve device, wherein the housing body is constituted by at least one laminate and includes an interior space in which the battery element is housed, a first housing portion that covers the interior space from a first side in a thickness direction of the battery, and a second housing portion that covers the interior space from a second side that is opposite to the first side in the thickness direction of the battery, the valve device is attached to the housing body and can make the interior space of the housing body be in communication with an external space, a joined edge portion is formed in the housing body as a result of the first housing portion and the second housing portion being fused along respective peripheral edge portions, the valve device is at least partially sandwiched between the first housing portion and the second housing portion in the joined edge portion, the first housing portion includes a bulge portion that is arranged on an inner side of an inner edge of the joined edge portion and bulges toward the first side in the thickness direction of the battery with respect to the joined edge portion, an inner end of the valve device is located on an outer side of an outer edge of the bulge portion, the valve device includes: a first portion in which a valve mechanism is formed, the valve mechanism being configured to discharge gas generated in the interior space of the housing body to the external space outside the housing body; and a second portion in which an air passage is formed, the air passage being configured to guide gas generated in the housing body toward the valve mechanism, and when viewed in a direction in which the air passage extends, an external shape of the first portion extends from an external shape of the second portion in the thickness direction of the battery.

17 . A battery comprising:
a battery element; a housing body; and a valve device, wherein the housing body is constituted by at least one laminate and includes an interior space in which the battery element is housed, a first housing portion that covers the interior space from a first side in a thickness direction of the battery, and a second housing portion that covers the interior space from a second side that is opposite to the first side in the thickness direction of the battery, the valve device is attached to the housing body and can make the interior space of the housing body be in communication with an external space, a joined edge portion is formed in the housing body as a result of the first housing portion and the second housing portion being fused along respective peripheral edge portions, the valve device is at least partially sandwiched between the first housing portion and the second housing portion in the joined edge portion, the first housing portion includes a bulge portion that is arranged on an inner side of an inner edge of the joined edge portion and bulges toward the first side in the thickness direction of the battery with respect to the joined edge portion, an inner end of the valve device is located on an outer side of an outer edge of the bulge portion, the valve device includes: a first portion in which a valve mechanism is formed, the valve mechanism being configured to discharge gas generated in the interior space of the housing body to the external space outside the housing body; and a second portion in which an air passage is formed, the air passage being configured to guide gas generated in the housing body toward the valve mechanism, and the first portion has a larger cross-sectional area than the second portion in a cross section that is perpendicular to a direction in which the air passage extends.

18 . The battery according to claim 17 ,
wherein, when viewed in the direction in which the air passage extends, an external shape of the first portion extends from an external shape of the second portion in the thickness direction of the battery.

19 . The battery according to claim 16 ,
wherein the inner end of the valve device reaches at least the inner edge of the joined edge portion.

20 . The battery according to any one of claim 17 ,
wherein the inner end of the valve device reaches at least the inner edge of the joined edge portion.

21 . A battery comprising:
a battery element; a housing body; and a valve device, wherein the housing body is constituted by at least one laminate and includes an interior space in which the battery element is housed, a first housing portion that covers the interior space from a first side in a thickness direction of the battery, and a second housing portion that covers the interior space from a second side that is opposite to the first side in the thickness direction of the battery, the valve device is attached to the housing body and can make the interior space of the housing body be in communication with an external space, a joined edge portion is formed in the housing body as a result of the first housing portion and the second housing portion being fused along respective peripheral edge portions, the valve device is at least partially sandwiched between the first housing portion and the second housing portion in the joined edge portion, the first housing portion includes a bulge portion that is arranged on an inner side of an inner edge of the joined edge portion and bulges toward the first side in the thickness direction of the battery with respect to the joined edge portion, the valve device includes a valve mechanism and a housing in which the valve mechanism is formed, the valve mechanism being configured to discharge gas generated in the interior space of the housing body to the external space outside the housing body, an inner end of the valve device is located on an outer side of an outer edge of the bulge portion and reaches at least the inner edge of the joined edge portion, and an inner end part of the housing includes an opening that is in communication with the interior space of the housing body in a closed state of the valve mechanism.

22 . The battery according to claim 21 ,
wherein the housing includes: a first portion in which the valve mechanism is formed; and a second portion in which an air passage is formed, the air passage being configured to guide gas generated in the housing body toward the valve mechanism.

23 . The battery according to claim 22 ,
wherein when viewed in a direction in which the air passage extends, an external shape of the first portion extends from an external shape of the second portion in the thickness direction of the battery.

24 . The battery according to claim 22 ,
wherein the first portion has a larger cross-sectional area than the second portion in a cross section that is perpendicular to a direction in which the air passage extends.

25 . The battery according to claim 23 ,
wherein the first portion has a larger cross-sectional area than the second portion in a cross section that is perpendicular to a direction in which the air passage extends.

26 . The battery according to claim 16 ,
wherein the first portion is located on an outer side of an outer edge of the joined edge portion.

27 . The battery according to claim 17 ,
wherein the first portion is located on an outer side of an outer edge of the joined edge portion.

28 . The battery according to claim 22 ,
wherein the first portion is located on an outer side of an outer edge of the joined edge portion.

29 . The battery according to claim 16 ,
wherein the inner end of the valve devi

Assignees

• Dainippon Printing Co Ltd

Inventors

• Mochizuki Youichi
• Takahagi Atsuko
• Yamashita Rikiya
• Sasaki Miho

Classifications

• H01M50/105

  Pouches or flexible bags · CPC title

• H01M50/202 Primary

  Casings or frames around the primary casing of a single cell or a single battery · CPC title

• H01M50/394

  Gas-pervious parts or elements · CPC title

• H01M50/317 Primary

  Re-sealable arrangements · CPC title

• H01M50/103

  prismatic or rectangular (H01M50/109, H01M50/11 take precedence) · CPC title