CA1049614A - Method and apparatus for measuring the state of charge of a battery by monitoring reductions in voltage - Google Patents

Method and apparatus for measuring the state of charge of a battery by monitoring reductions in voltage

Info

Publication number
CA1049614A
CA1049614A CA241,631A CA241631A CA1049614A CA 1049614 A CA1049614 A CA 1049614A CA 241631 A CA241631 A CA 241631A CA 1049614 A CA1049614 A CA 1049614A
Authority
CA
Canada
Prior art keywords
terminal voltage
battery
output signal
voltage
magnitude
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.)
Expired
Application number
CA241,631A
Other languages
English (en)
French (fr)
Other versions
CA241631S (en
Inventor
Eugene P. Finger
Eugene A. Sands
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.)
Curtis Instruments Inc
Original Assignee
Curtis 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
Priority claimed from US05/591,055 external-priority patent/US4017724A/en
Application filed by Curtis Instruments Inc filed Critical Curtis Instruments Inc
Application granted granted Critical
Publication of CA1049614A publication Critical patent/CA1049614A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
    • G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/3644—Constructional arrangements
    • G01R31/3646—Constructional arrangements for indicating electrical conditions or variables, e.g. visual or audible indicators

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Tests Of Electric Status Of Batteries (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
CA241,631A 1975-01-03 1975-12-12 Method and apparatus for measuring the state of charge of a battery by monitoring reductions in voltage Expired CA1049614A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US53846375A 1975-01-03 1975-01-03
US05/591,055 US4017724A (en) 1975-06-27 1975-06-27 Apparatus for measuring battery depletion by monitoring reductions in voltage

Publications (1)

Publication Number Publication Date
CA1049614A true CA1049614A (en) 1979-02-27

Family

ID=27065826

Family Applications (1)

Application Number Title Priority Date Filing Date
CA241,631A Expired CA1049614A (en) 1975-01-03 1975-12-12 Method and apparatus for measuring the state of charge of a battery by monitoring reductions in voltage

Country Status (6)

Country Link
JP (1) JPS5193340A (it)
CA (1) CA1049614A (it)
DE (1) DE2558526C2 (it)
FR (1) FR2296945A1 (it)
GB (1) GB1537500A (it)
IT (1) IT1062151B (it)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3706076A1 (de) * 1987-02-25 1988-09-08 Elektron Bremen Verfahren und vorrichtung zur ueberwachung des bereitschaftszustandes eines batteriebetriebenen fahrzeuges
US6252378B1 (en) * 2000-01-10 2001-06-26 Snap-On Technologies, Inc. Usage counter for portable jump-starting battery unit
DE102004056190B4 (de) * 2004-11-20 2013-12-19 Braun Gmbh Verfahren zur Bestimmung eines Ladungszustands einer wiederaufladbaren Batterie
US7496460B2 (en) 2006-09-06 2009-02-24 Eastway Fair Company Limited Energy source monitoring and control system for power tools
US11310879B1 (en) * 2021-02-05 2022-04-19 Monolithic Power Systems, Inc. Adaptive feedback control in LED driving circuits
CN114487644B (zh) * 2021-12-17 2024-11-26 未来穿戴技术股份有限公司 充电状态检测方法、装置、电子设备及存储介质

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE648836C (de) * 1935-11-01 1937-08-09 Accumulatoren Fabrik Akt Ges Verfahren zur Kompensation des scheinbaren inneren Widerstandes der Batterie bei derSchaltung zur Messung des Betriebszustandes
GB1136083A (en) * 1965-03-11 1968-12-11 Eaton Yale & Towne A circuit for indicating when a battery is discharged
US3484681A (en) * 1967-10-27 1969-12-16 Grady Charles B Jun Remaining battery charge meter
DE2028117B2 (en) * 1969-06-12 1975-11-27 Ckd Praha, Oborovy Podnik, Prag Charge condition monitor and control for battery charger - stores earlier terminal volts value for comparison with later volts value
FR2209107B1 (it) * 1972-12-06 1977-12-23 Redresseurs Sta Benit
DE2321108B2 (de) * 1973-04-26 1976-06-16 Elektron Fabrik für physikalischtechnische Geräte Kerber & Co., 2800 Bremen Einrichtung zur ueberwachung des entladezustands einer batterie

Also Published As

Publication number Publication date
DE2558526A1 (de) 1976-07-08
FR2296945B1 (it) 1981-02-13
JPS5193340A (it) 1976-08-16
DE2558526C2 (de) 1985-09-19
GB1537500A (en) 1978-12-29
IT1062151B (it) 1983-06-30
FR2296945A1 (fr) 1976-07-30

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