JPS5681475A - Electronic wrist watch - Google Patents

Electronic wrist watch

Info

Publication number
JPS5681475A
JPS5681475A JP15840679A JP15840679A JPS5681475A JP S5681475 A JPS5681475 A JP S5681475A JP 15840679 A JP15840679 A JP 15840679A JP 15840679 A JP15840679 A JP 15840679A JP S5681475 A JPS5681475 A JP S5681475A
Authority
JP
Japan
Prior art keywords
battery
secondary battery
circuit
terminal voltage
occurrence
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15840679A
Other languages
Japanese (ja)
Inventor
Taiji Tanigaki
Kazutoshi Takeda
Akira Kayama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP15840679A priority Critical patent/JPS5681475A/en
Publication of JPS5681475A publication Critical patent/JPS5681475A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C10/00—Arrangements of electric power supplies in time-pieces
    • G04C10/02—Arrangements of electric power supplies in time-pieces the power supply being a radioactive or photovoltaic source

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Secondary Cells (AREA)

Abstract

PURPOSE:To prevent the occurrence of excessive charging of the secondary battery by discharging the secondary battery at the time when the terminal voltage of the prescribed secondary battery such as a silver battery exceeds a prescribed value. CONSTITUTION:The terminal voltage of the secondary battery 3 formed of the silver oxide, in which anode and cathode active materials charged by a solar battery 1 are silver oxide, zonc or the like, is detected by a battery voltage detecting circuit 4. And, when the terminal voltage exceeds 1,85V, the transistor, etc. of a discharging circuit 5 is made conductive by the output of detection of the circuit 4 and the battery 3 is discharged with larger current than the charging current, whereby the occurrence of the excessive charging of the battery 3 is prevented and a watch functioning electronic circuit 6, etc. is driven by the battery 3 in a stable fashion.
JP15840679A 1979-12-06 1979-12-06 Electronic wrist watch Pending JPS5681475A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15840679A JPS5681475A (en) 1979-12-06 1979-12-06 Electronic wrist watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15840679A JPS5681475A (en) 1979-12-06 1979-12-06 Electronic wrist watch

Publications (1)

Publication Number Publication Date
JPS5681475A true JPS5681475A (en) 1981-07-03

Family

ID=15671047

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15840679A Pending JPS5681475A (en) 1979-12-06 1979-12-06 Electronic wrist watch

Country Status (1)

Country Link
JP (1) JPS5681475A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011520409A (en) * 2008-04-02 2011-07-14 インフィニット パワー ソリューションズ， インコーポレイテッド Control and protection of passive over and under voltage for energy storage devices associated with energy intake

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011520409A (en) * 2008-04-02 2011-07-14 インフィニット パワー ソリューションズ， インコーポレイテッド Control and protection of passive over and under voltage for energy storage devices associated with energy intake

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