Sealed battery manufacturing method

Patent metadata

Field	Value
Publication number	US-10158147-B2
Application number	US-201414897107-A
Country	US
Kind code	B2
Filing date	Jun 3, 2014
Priority date	Jun 11, 2013
Publication date	Dec 18, 2018
Grant date	Dec 18, 2018

Abstract

A sealed battery manufacturing method includes inserting a supply nozzle (120) into an opening (33) that is opened outwardly, the opening (33) being formed in a battery container (33); and introducing a detection gas (He) into the battery container in such a manner that injection of the detection gas from the supply nozzle (120) is started at a pressure smaller than a predetermined injection pressure, and then an injection pressure of the detection gas (He) is increased by stages until the injection pressure of the detection gas (He) reaches the predetermined injection pressure.

First claim

The invention claimed is:

1. A sealed battery manufacturing method comprising:
inserting a supply nozzle into an opening that is opened outwardly, the opening being formed in a battery container; and
introducing a detection gas into the battery container in such a manner that injection of the detection gas from the supply nozzle is started at a first pressure smaller than a second predetermined injection pressure, and then an injection pressure of the detection gas is increased by stages, reaching and surpassing the second predetermined injection pressure, until the injection pressure of the detection gas reaches a third predetermined injection pressure, the third predetermined injection pressure being larger than the second predetermined injection pressure.

2. The sealed battery manufacturing method according to claim 1 , wherein:
the injection pressure of the detection gas is increased to the predetermined injection pressure in such a manner that a flow speed of the detection gas is increased gradually by increasing the injection pressure of the detection gas by a plurality of stages.

3. The sealed battery manufacturing method according to claim 2 , wherein:
every time the injection pressure of the detection gas is increased by stages, the injection of the detection gas is performed for a given time at the injection pressure increased by stages in each stage.

4. The sealed battery manufacturing method according to claim 1 , wherein:
the injection of the detection gas is performed generally at a uniform pressure change rate of the injection pressure until the injection pressure of the detection gas reaches the predetermined injection pressure.

5. The sealed battery manufacturing method according to claim 1 , wherein:
the supply nozzle is inserted into the opening in a state where the injection pressure of the detection gas is zero.

6. The sealed battery manufacturing method according to claim 1 , wherein the first pressure is a non-zero pressure.

7. A sealed battery manufacturing method comprising:
inserting a supply nozzle into an opening that is opened outwardly, the opening being formed in a battery container; and
introducing a detection gas into the battery container in such a manner that injection of the detection gas from the supply nozzle is started at a pressure smaller than a predetermined injection pressure, and then an injection pressure of the detection gas is increased by stages until the injection pressure of the detection gas reaches the predetermined injection pressure, wherein
the injection pressure of the detection gas is increased to the predetermined injection pressure in such a manner that a flow speed of the detection gas is increased gradually by increasing the injection pressure of the detection gas by a plurality of stages.

Assignees

• Toyota Motor Co Ltd

Inventors

• Tsukui Akira

Classifications

• H01M6/50

  Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) · CPC title

• H01M10/0525

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

• H01M10/4228 Primary

  Leak testing of cells or batteries · CPC title

• H01M6/5083

  Testing apparatus · CPC title

• H01M2/367

  Electricity · mapped topic