FR2412847A1 - Vehicle battery state of charge indicator - has transistor switching off when series Zener diode is non-conducting due to low voltage, illuminating parallel electroluminescent diode - Google Patents

Vehicle battery state of charge indicator - has transistor switching off when series Zener diode is non-conducting due to low voltage, illuminating parallel electroluminescent diode

Info

Publication number
FR2412847A1
FR2412847A1 FR7739246A FR7739246A FR2412847A1 FR 2412847 A1 FR2412847 A1 FR 2412847A1 FR 7739246 A FR7739246 A FR 7739246A FR 7739246 A FR7739246 A FR 7739246A FR 2412847 A1 FR2412847 A1 FR 2412847A1
Authority
FR
France
Prior art keywords
diode
vehicle battery
low voltage
battery state
zener 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.)
Withdrawn
Application number
FR7739246A
Other languages
French (fr)
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.)
LECOLE MICHEL
Original Assignee
LECOLE MICHEL
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 LECOLE MICHEL filed Critical LECOLE MICHEL
Priority to FR7739246A priority Critical patent/FR2412847A1/en
Publication of FR2412847A1 publication Critical patent/FR2412847A1/en
Withdrawn legal-status Critical Current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
    • 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]
    • G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
    • G01R31/379—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator for lead-acid batteries

Abstract

The state of charge of motor vehicle battery is shown by electronic indicator which has low power consumption and improved reliability since there are no moving parts. A generator (G) charges the vehicle battery (Vo) to which a transistor (T1) base is connected via a zener diode (D2) and a series resistor (R2). When the battery voltage is below nominal value the diode does not conduct and the transistor is cut-off. In this condition an electroluminescent diode (D1) with a series resistor (R1) connected to the battery is illuminated. As battery voltage increases the transistor draws the collector current to extinguish the diode.
FR7739246A 1977-12-22 1977-12-22 Vehicle battery state of charge indicator - has transistor switching off when series Zener diode is non-conducting due to low voltage, illuminating parallel electroluminescent diode Withdrawn FR2412847A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7739246A FR2412847A1 (en) 1977-12-22 1977-12-22 Vehicle battery state of charge indicator - has transistor switching off when series Zener diode is non-conducting due to low voltage, illuminating parallel electroluminescent diode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7739246A FR2412847A1 (en) 1977-12-22 1977-12-22 Vehicle battery state of charge indicator - has transistor switching off when series Zener diode is non-conducting due to low voltage, illuminating parallel electroluminescent diode

Publications (1)

Publication Number Publication Date
FR2412847A1 true FR2412847A1 (en) 1979-07-20

Family

ID=9199351

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7739246A Withdrawn FR2412847A1 (en) 1977-12-22 1977-12-22 Vehicle battery state of charge indicator - has transistor switching off when series Zener diode is non-conducting due to low voltage, illuminating parallel electroluminescent diode

Country Status (1)

Country Link
FR (1) FR2412847A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2558805A1 (en) * 1975-12-27 1977-07-07 Teves Gmbh Alfred Electronic battery voltage monitor for motor vehicles - uses Zener diode matched to required battery volts and has transistor switch with light diode indicator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2558805A1 (en) * 1975-12-27 1977-07-07 Teves Gmbh Alfred Electronic battery voltage monitor for motor vehicles - uses Zener diode matched to required battery volts and has transistor switch with light diode indicator

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Legal Events

Date Code Title Description
ST Notification of lapse