Title:
SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP3539620
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To open sealing of a battery container without leaving internal energy in the cell container in the case of the incidence of an abnormality in the batteris container of a secondary battery.
SOLUTION: A safety mechanism composed of a vent 1 formed on a battery container, a valve 2 comprising thermal deformation material to be deformed by heat generation caused by a current, installed on the peripheral part of an opening of the vent 1 by being connected to an electrode, a safety valve body 3 for sealing the air hole 1 and for opening the vent 1 by moving sequentially with the deformation of the valve 2, and a switch 4 interposed between the electrode and the valve 2, for cutting the conduction between the electrode and the valve 2 at regular times and for allowing the conduction between the electrode and the valve 2, when the pressure or the temperature in the battery container is raised abnormally, is installed in this secondary battery. On the occurrence of an abnormality, the switch 4 is changed to the ON state to send a current to the valve 2, and the valve 2 generates heat and is deformed. As a result, the safety valve body 3 is opened to thereby reduce the internal energy and the pressure in the container.
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Inventors:
Yoshiyuki Maruyama
Application Number:
JP2795199A
Publication Date:
July 07, 2004
Filing Date:
February 04, 1999
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
H01M2/12; (IPC1-7): H01M2/12
Domestic Patent References:
| JP9320562A | ||||
| JP8124554A | ||||
| JP8064197A | ||||
| JP7320711A | ||||
| JP6290767A | ||||
| JP50065830A | ||||
| JP10261400A |
Attorney, Agent or Firm:
Hiroshi Okawa