JPS6459178A - Battery state detecting apparatus - Google Patents

Battery state detecting apparatus

Info

Publication number
JPS6459178A
JPS6459178A JP62218249A JP21824987A JPS6459178A JP S6459178 A JPS6459178 A JP S6459178A JP 62218249 A JP62218249 A JP 62218249A JP 21824987 A JP21824987 A JP 21824987A JP S6459178 A JPS6459178 A JP S6459178A
Authority
JP
Japan
Prior art keywords
battery
during
detected
absence
copy
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
JP62218249A
Other languages
Japanese (ja)
Inventor
Sohei Tanaka
Yoshihiko Suzuki
Satoshi Mori
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Priority to JP62218249A priority Critical patent/JPS6459178A/en
Publication of JPS6459178A publication Critical patent/JPS6459178A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Or Security For Electrophotography (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Tests Of Electric Status Of Batteries (AREA)

Abstract

PURPOSE:To accurately detect the charge period of a battery and to prevent the shortening of the life of the battery due to over-discharge, by changing over battery-absence detection voltage between during image forming operation and during non-operation when the charge period of a secondary battery is detected. CONSTITUTION:The inputs P0, P1 of a microcomputer 101 are connected to the output terminals of comparators 106, 107, and battery voltage and stable voltage are inputted to the input terminals of the comparators 106, 107. When an operating part 102 is pushed, the microcomputer 101 performs a copy sequence and, when both of the ports P0, P1 are a low level and the absence of a battery is detected, charge display is performed after copy is finished and, in the case of the presence of the battery, a command stand-by state is obtained. When the port P0 becomes a low level during stand-by and the absence of the battery detected, charge display is performed. As mentioned above, by changing over detection voltage between during copy and during stand-by, the over-discharge of the battery is prevented.
JP62218249A 1987-08-31 1987-08-31 Battery state detecting apparatus Pending JPS6459178A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62218249A JPS6459178A (en) 1987-08-31 1987-08-31 Battery state detecting apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62218249A JPS6459178A (en) 1987-08-31 1987-08-31 Battery state detecting apparatus

Publications (1)

Publication Number Publication Date
JPS6459178A true JPS6459178A (en) 1989-03-06

Family

ID=16716928

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62218249A Pending JPS6459178A (en) 1987-08-31 1987-08-31 Battery state detecting apparatus

Country Status (1)

Country Link
JP (1) JPS6459178A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7885569B2 (en) * 2003-12-08 2011-02-08 Ricoh Company, Ltd. Heater, fixing unit and image forming apparatus operable with a main and auxiliary power supply unit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6189573A (en) * 1984-10-09 1986-05-07 Nec Corp Battery alarm circuit
JPS61157240A (en) * 1984-12-28 1986-07-16 キヤノン株式会社 Forming device for picture

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6189573A (en) * 1984-10-09 1986-05-07 Nec Corp Battery alarm circuit
JPS61157240A (en) * 1984-12-28 1986-07-16 キヤノン株式会社 Forming device for picture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7885569B2 (en) * 2003-12-08 2011-02-08 Ricoh Company, Ltd. Heater, fixing unit and image forming apparatus operable with a main and auxiliary power supply unit
US7957663B2 (en) 2003-12-08 2011-06-07 Ricoh Company, Ltd. Heater, fixing unit and image forming apparatus

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