Title:
LITHIUM-ION SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP2004247059
Kind Code:
A
Abstract:
To provide a lithium-ion secondary battery surely operating a safety mechanism before an internal short circuit occurs to enhance safety by controlling the operating time of the safety mechanism.
A safety valve 14 for exhausting decomposed gas of an electrolyte generating inside the battery in overcharge to the outside is installed in the lithium-ion secondary battery 19, and by setting valve opening pressure at 0.54 MPa, the safety valve 14 is opened about 95 seconds before an internal short circuit occurs in the overcharge to exhaust the decomposed gas of the electrolyte to the outside in an early stage.
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Inventors:
ARAKAWA HIROSHI
Application Number:
JP2003032523A
Publication Date:
September 02, 2004
Filing Date:
February 10, 2003
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
H01M2/12; H01M2/34; H01M10/05; H01M10/052; H01M10/0525; H01M10/0566; (IPC1-7): H01M10/40; H01M2/12
Domestic Patent References:
| JP2002151020A | 2002-05-24 | |||
| JPH11102682A | 1999-04-13 | |||
| JPH10261440A | 1998-09-29 | |||
| JP2001357887A | 2001-12-26 | |||
| JPH1186820A | 1999-03-30 |
Attorney, Agent or Firm:
Takashi Tomizawa
Ikuo Yamanaka
Akika Okado
Ikuo Yamanaka
Akika Okado