Title:
回路保護アレンジメント
Document Type and Number:
Japanese Patent JP4318923
Kind Code:
B2
Abstract:
A circuit protection arrangement particularly useful in protecting battery assemblies. The arrangement contains a first PTC device which has a first switching temperature Ts1, has a resistance at 20° C. R1, has a hold current at a first specified temperature IH1, and is made from a first PTC resistive element composed of a first conductive polymer composition attached to first and second electrodes, and a second PTC device which is electrically connected in series with the first PTC device, has a second switching temperature Ts2 which is less than Ts1, has a resistance at 20° C. R2 which is less than R1, has a hold current at the first specified temperature IH2 which is greater than IH1, and is made from a second PTC resistive element composed of a second conductive polymer composition attached to third and fourth electrodes. IH1 equals IH2 at a critical temperature Tcrit, such that at temperatures below Tcrit, the first PTC device switches into a high resistance state and the circuit protection arrangement is resettable, and at temperatures greater than Tcrit, the second PTC device switches into a high resistance state and initiates an action causing the circuit protection arrangement to permanently open.
Inventors:
Takashi Hasunuma
Naofumi Miyasaka
Masatoshi Sakamoto
Takashi Sato
Naofumi Miyasaka
Masatoshi Sakamoto
Takashi Sato
Application Number:
JP2002588567A
Publication Date:
August 26, 2009
Filing Date:
May 07, 2002
Export Citation:
Assignee:
Tyco Electronics Raychem Co., Ltd.
International Classes:
H01C7/02; H01C13/02; H01M50/583; H02H9/02; H01M6/50; H01M10/0525
Domestic Patent References:
| JP49086337U | ||||
| JP5101904A | ||||
| JP61023301A | ||||
| JP61100903A |
Attorney, Agent or Firm:
Samejima Mutsumi