JPS6459517A - Battery charging circuit for memory backup - Google Patents

Battery charging circuit for memory backup

Info

Publication number
JPS6459517A
JPS6459517A JP62217670A JP21767087A JPS6459517A JP S6459517 A JPS6459517 A JP S6459517A JP 62217670 A JP62217670 A JP 62217670A JP 21767087 A JP21767087 A JP 21767087A JP S6459517 A JPS6459517 A JP S6459517A
Authority
JP
Japan
Prior art keywords
battery
resistor
bat
several hours
time
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
JP62217670A
Other languages
Japanese (ja)
Inventor
Yasutoshi Takizawa
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 Epson Corp
Original Assignee
Seiko Epson Corp
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 Epson Corp filed Critical Seiko Epson Corp
Priority to JP62217670A priority Critical patent/JPS6459517A/en
Publication of JPS6459517A publication Critical patent/JPS6459517A/en
Pending legal-status Critical Current

Links

Landscapes

  • Power Sources (AREA)

Abstract

PURPOSE:To charge a secondary battery for memory backup fully in a short time and to guarantee the service life of the battery, by varying the charging current of the secondary battery. CONSTITUTION:A control circuit 3 closes a switch SW only for several hours only at the time of initializing the said system. At this time, the charging current of the battery BAT is increased compared with a case where charging is performed via a resistor R1 since the resistor R1 and a resistor R2 are connected in parallel. By setting the value of the resistor R2 so as to be charged full within the several hours, the BAT is charged fully in the several hours after initialization. Furthermore, after the lapse of a prescribed time, a battery circuit opens the SW, and the charging current to the BAT is decreased, and a trickle charging state is generated, then, the service life of the battery can be secured.
JP62217670A 1987-08-31 1987-08-31 Battery charging circuit for memory backup Pending JPS6459517A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62217670A JPS6459517A (en) 1987-08-31 1987-08-31 Battery charging circuit for memory backup

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62217670A JPS6459517A (en) 1987-08-31 1987-08-31 Battery charging circuit for memory backup

Publications (1)

Publication Number Publication Date
JPS6459517A true JPS6459517A (en) 1989-03-07

Family

ID=16707880

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62217670A Pending JPS6459517A (en) 1987-08-31 1987-08-31 Battery charging circuit for memory backup

Country Status (1)

Country Link
JP (1) JPS6459517A (en)

Similar Documents

Publication Publication Date Title
CA2020384A1 (en) Battery charger for a portable wireless telephone set having means for tricklingly charging the battery with an increased current during a stand-by period of the telephone set
ATE123184T1 (en) BATTERY CHARGER.
ES8302375A1 (en) Battery charger.
EP0368353A3 (en) Battery charging apparatus
GB2139434B (en) Improvements in or relating to battery charging
EP0621649A4 (en) Battery pack.
DE3682377D1 (en) MONITORING THE CONDITION OF A BATTERY.
TW208095B (en)
MY111943A (en) Apparatus and method for charging
CH607813GA3 (en) Timepiece comprising a solar battery
JPS55111079A (en) Capacity recovery method in lead acid battery
JPS55150567A (en) Actuation of nickel-iron battery group
JPS6459517A (en) Battery charging circuit for memory backup
JPS5525584A (en) Automatic operating device for water pump
JPS6477432A (en) Charge-and-discharge control of charging battery
JPS6439235A (en) Battery charging equipment
JPS6477433A (en) Charge-and-discharge control device for storage battery
JPS6447232A (en) Recharging circuit
JPS645334A (en) Boosting charge control device
JPS6477431A (en) Charging control method
JPS5593678A (en) Charging method
JPS55111078A (en) Direct current power supply
JPS5796474A (en) Charging method of enclosed type alkaline storage battery
JPS55143780A (en) Charging method of nickel-iron battery
JPS6421869A (en) Formation of sealed-type alkaline storage battery