US 9,853,266 B2Granted

Vent and cap assembly of power battery

AssigneeNingde Amperex Technology Limited

InventorsQuankun Li, Pinghua Deng, Peng Wang, Jibin Geng, Kai Wu

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Abstract

The present disclosure provides a vent and a cap assembly of a power battery. The vent comprises a vent body and a vent body protective sheath having a wall portion and a hollow portion, the vent body is fixedly connected to a lower portion of the wall portion and sealing the hollow portion from below, an upper portion of the wall portion is fixedly connected to a cap plate for sealing a vent hole. The cap assembly of the power battery comprises a cap plate provided with a vent hole and an electrolyte-injection hole; a first electrode post connected to the cap plate; a second electrode post connected to the cap plate; and a vent fixedly provided to the vent hole; wherein the vent is the above vent.

Claims14

Dependent claims

A cap assembly of a power battery configured to release pressure from the power battery, comprising:

a cap plate provided with a vent hole and a vent configured to release pressure on the cap plate of the power battery, the vent comprising a vent body, and a vent body protective sheath, both located inside the power battery and below the cap plate, wherein:
the vent body protective sheath has a wall portion and a hollow portion, the vent body being fixedly connected to a lower portion of the wall portion and sealing the hollow portion from below, an upper portion of the wall portion being fixedly connected to an interior surface of the cap plate facing an inside of the power battery, and the upper portion of the wall portion having an upper end that is co-planar with an exterior surface of the cap plate of the power battery for sealing the vent hole in the cap plate;
wherein the wall portion of the vent body protective sheath is provided with a stepped portion at an outer side surface between the lower portion and the upper portion of the wall portion and the stepped portion is directly connected to the interior surface of the cap plate at an edge from below.

Dependencies are inferred from the claim text.

Facts

Application: 14/253,805Filed 15 Apr 2014
Priority: CN 2013 2 0201888 U19 Apr 2013
Published: US 2014/0315050 A123 Oct 2014
Granted: 26 Dec 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H01M 50/342
Arrangements for facilitating escape of gases: non-re-sealable arrangements
H01M 50/627
Arrangements or processes for filling with liquid, e.g. electrolytes: filling ports
H01M 50/3425
Non-re-sealable arrangements: in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
Y02E 60/10
Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation: energy storage using batteries