# US 2024/0204337 A1 · Battery packaging material having a valve device

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- Number: US 2024/0204337 A1
- Document ID: US20240204337A1
- Status: Published application
- Kind: A1
- Application number: 18/590,074
- Filed: 2024-02-28
- Published: 2024-06-20
- Earliest claimed: 2018-05-28
- Assignees: Dai Nippon Printing Co., Ltd.
- Applicants: Dai Nippon Printing Co., Ltd.
- Inventors: Youichi MOCHIZUKI; Atsuko TAKAHAGI; Rikiya YAMASHITA; Miho SASAKI
- Web page: https://patentgrep.com/patent/US20240204337A1

## CPC

- H01M 10/049: {Processes for forming or storing electrodes in the battery container}
- H01M 50/325: comprising deformable valve members, e.g. elastic or flexible valve members
- H01G 2/103: {Sealings, e.g. for lead-in wires; Covers}
- H01G 11/20: Reformation or processes for removal of impurities, e.g. scavenging
- H01G 11/80: Gaskets; Sealings
- H01M 50/105: Pouches or flexible bags
- H01M 50/119: Metals
- H01M 50/121: Organic material
- H01M 50/124: having a layered structure
- H01M 50/129: with two or more layers of only organic material
- H01G 11/14: Arrangements or processes for adjusting or protecting hybrid or EDL capacitors (emergency protective circuit arrangements specially adapted for capacitors, and effecting automatic switching in the event of an undesired change from normal working conditions H02H7/16; emergency protective circuit arrangements for limiting excess current or voltages without disconnection H02H9/00)
- H01G 11/78: Cases; Housings; Encapsulations; Mountings
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A battery includes a battery element, housing body, and valve device. The housing body has a laminate including a base material, barrier, and heat-sealable resin layers. The valve device is in communication with the housing body inside. A joined edge portion in which the mutually facing heat-sealable resin layers are fused together is formed in a housing body peripheral edge portion. The valve device includes first and second portions. A valve mechanism reduces the housing body internal pressure if it is increased due to gas generated in the housing body is formed in the first portion. An air passage guides gas generated in the housing body toward the valve mechanism is formed in the second portion. The first portion is located on a joined edge portion edge outer side. At least a portion of the second portion is sandwiched between the heat-sealable resin layers in the joined edge portion.

## Claims

### Claim 1

A battery comprising:
a battery element;
a housing body that is constituted by at least one laminate including at least a base material layer, a barrier layer, and a heat-sealable resin layer layered in that order and houses the battery element; and
a valve device that is in communication with the inside of the housing body,
wherein the heat-sealable resin layers face each other in a peripheral edge portion of the housing body,
a joined edge portion in which the mutually facing heat-sealable resin layers are fused together is formed in the peripheral edge portion of the housing body,
the valve device includes:
a first portion in which a valve mechanism is formed, the valve mechanism being configured to reduce an internal pressure of the housing body if the internal pressure is increased due to gas generated in 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,
the first portion is located on an outer side of an outer edge of the joined edge portion,
at least a portion of the second portion is sandwiched between the heat-sealable resin layers in the joined edge portion, and
a length of the second portion in a width direction of the battery is longer than a length of the second portion in a thickness direction of the battery.