Energy storage apparatus

Patent metadata

Field	Value
Publication number	US-9735407-B2
Application number	US-201414481408-A
Country	US
Kind code	B2
Filing date	Sep 9, 2014
Priority date	Sep 12, 2013
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

An energy storage apparatus includes one or more energy storage devices and an outer housing that houses the one or more energy storage devices. The outer housing includes a communication part defining a passageway allowing communication between an interior and an exterior of the outer housing, and the communication part includes a functional membrane that allows passage of gas and prohibits passage of liquid.

First claim

The invention claimed is:

1. An energy storage apparatus, comprising:
one or more energy storage devices; and
an outer housing that houses the one or more energy storage devices,
wherein the outer housing includes an outer housing main body, a cover that closes an opening of the outer housing main body, an outer terminal disposed on the cover, and a communication part defining a passageway allowing a communication between an interior and an exterior of the outer housing,
wherein the communication part includes a functional membrane that extends substantially parallel to the cover for passage of a gas in a first direction perpendicular to the cover and prohibits passage of a liquid, the communication part further including a protruding section that extends substantially parallel to the cover for passage of the gas, which has passed the functional membrane, in a second direction parallel to the cover, and
wherein the functional membrane is confined inside the communication part.

2. The energy storage apparatus according to claim 1 , wherein the communication part further includes a pressure valve that seals the passageway in a first state and allows communication between the interior and the exterior of the outer housing through the passageway in a second state, the pressure valve being in the first state when internal pressure in the interior of the outer housing is less than or equal to a predetermined pressure, and the pressure valve being in the second state when the internal pressure is greater than the predetermined pressure, and
wherein the pressure valve is disposed closer to the exterior of the outer housing than the functional membrane is in the passageway.

3. The energy storage apparatus according to claim 1 , wherein the functional membrane does not overlap with the protruding section when viewed in the first direction.

4. The energy storage apparatus according to claim 3 , wherein, when viewed in the second direction, the protruding section is disposed so as to be shifted from the functional membrane.

Assignees

• Lithium Energy Japan
• Gs Yuasa Int Ltd

Inventors

• Kusunoki Toshiki
• Ushijima Osamu

Classifications

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/425

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M50/367

  Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems · CPC title

• H01M50/317

  Re-sealable arrangements · CPC title