JPS55151273A - Battery capacity display unit - Google Patents

Battery capacity display unit

Info

Publication number
JPS55151273A
JPS55151273A JP6016379A JP6016379A JPS55151273A JP S55151273 A JPS55151273 A JP S55151273A JP 6016379 A JP6016379 A JP 6016379A JP 6016379 A JP6016379 A JP 6016379A JP S55151273 A JPS55151273 A JP S55151273A
Authority
JP
Japan
Prior art keywords
voltage
battery
battery capacity
comparator
diode
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
JP6016379A
Other languages
Japanese (ja)
Inventor
Yoshitaka Hashimoto
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP6016379A priority Critical patent/JPS55151273A/en
Publication of JPS55151273A publication Critical patent/JPS55151273A/en
Pending legal-status Critical Current

Links

Classifications

    • Y02E60/12—

Abstract

PURPOSE: To make it possible to simplify maintenance at low cost by putting a display circuit into operation by making a voltage comparator detect a point in time when a battery voltage is equivalent to battery capacity and below a reference voltage generated by a Zener diode.
CONSTITUTION: When battery B is continuously discharged, battery voltage VB falls with discharge characteristics shown in the figure. On the other, since across voltage VZ of Zener diode Z is constant without reference to the fall of battery voltage VB, an invariably-constant reference voltage voltage-divided by potentiometer P is applied to one terminal of voltage comparator C such as an operational amplifier. Next, when volume VR and potentiometer P are adjusted to divided voltage VD of battery voltage VB and reference voltage VP as shown in the figure, an output signal is obtained by comparator C with VP less than VD and transistor Q conducts to make light emitting diode L come on; when VD<VP, diode L goes off, displaying the battery capacity decreases down to fixed battery capacity.
COPYRIGHT: (C)1980,JPO&Japio
JP6016379A 1979-05-15 1979-05-15 Battery capacity display unit Pending JPS55151273A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6016379A JPS55151273A (en) 1979-05-15 1979-05-15 Battery capacity display unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6016379A JPS55151273A (en) 1979-05-15 1979-05-15 Battery capacity display unit

Publications (1)

Publication Number Publication Date
JPS55151273A true JPS55151273A (en) 1980-11-25

Family

ID=13134201

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6016379A Pending JPS55151273A (en) 1979-05-15 1979-05-15 Battery capacity display unit

Country Status (1)

Country Link
JP (1) JPS55151273A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103323777A (en) * 2012-03-21 2013-09-25 海洋王（东莞）照明科技有限公司 Battery capacity detection circuit
CN103364725A (en) * 2012-03-26 2013-10-23 海洋王（东莞）照明科技有限公司 Battery service life testing circuit and battery service life testing device
CN113109724A (en) * 2021-04-12 2021-07-13 无锡市欧瑞杰电子科技有限公司 Battery capacity detection circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5414281A (en) * 1977-07-04 1979-02-02 Seiko Instr & Electronics Ltd Battery voltage detecting circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5414281A (en) * 1977-07-04 1979-02-02 Seiko Instr & Electronics Ltd Battery voltage detecting circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103323777A (en) * 2012-03-21 2013-09-25 海洋王（东莞）照明科技有限公司 Battery capacity detection circuit
CN103364725A (en) * 2012-03-26 2013-10-23 海洋王（东莞）照明科技有限公司 Battery service life testing circuit and battery service life testing device
CN113109724A (en) * 2021-04-12 2021-07-13 无锡市欧瑞杰电子科技有限公司 Battery capacity detection circuit

Similar Documents

Publication Publication Date Title
JPS5714726A (en) Measuring device for quantity of light
EP0525983A3 (en) Device for measuring the state of charge of a battery
JPS5651674A (en) Level detecting circuit
JPS55151273A (en) Battery capacity display unit
US4464049A (en) Illumination flicker meter
US3649913A (en) Capacitor charge indicator circuit
JPS56131226A (en) Afc circuit
JPS5755616A (en) Transistor relay
US3990008A (en) Display circuit for battery powered digital meter
SU715944A1 (en) Photoelectronic device
JPS5580069A (en) Power supply capacity information display unit
JPS55104765A (en) Power supply voltage indicating circuit
JPS5682455A (en) High voltage direct current measuring apparatus
JPS6416925A (en) Fuel display device for vehicle
JPS57141570A (en) Display device for charging and discharging quantity of accumulator
JPS5473086A (en) Photomectric circuit
JPS5565110A (en) Distance meter
KR890009002Y1 (en) Indicating circuit of state of charging or discharging of battery
JPS5770404A (en) Capacitance detecting circuit
JPS6459091A (en) Battery capacity detecting device
JPS6410151A (en) Estimation and display device for life of xenon lamp
JPS5487280A (en) Analog input circuit
JPS552915A (en) Device to detect number of revolution
JPS5657962A (en) Frequency detector
JPS56664A (en) Battery display unit