GB2020436A - Improvements in or relating to ampere - hour meters - Google Patents

Improvements in or relating to ampere - hour meters

Info

Publication number
GB2020436A
GB2020436A GB7914967A GB7914967A GB2020436A GB 2020436 A GB2020436 A GB 2020436A GB 7914967 A GB7914967 A GB 7914967A GB 7914967 A GB7914967 A GB 7914967A GB 2020436 A GB2020436 A GB 2020436A
Authority
GB
United Kingdom
Prior art keywords
capacitor
current
ampere
relating
charging
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.)
Granted
Application number
GB7914967A
Other versions
GB2020436B (en
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.)
AGA AB
Original Assignee
AGA AB
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 AGA AB filed Critical AGA AB
Publication of GB2020436A publication Critical patent/GB2020436A/en
Application granted granted Critical
Publication of GB2020436B publication Critical patent/GB2020436B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • 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]

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Tests Of Electric Status Of Batteries (AREA)
  • Investigating Or Analysing Biological Materials (AREA)

Abstract

An ampere-hour meter has a current generator 4 connected across a resistance 3 through which the load current passes, generator 4 charging a capacitor 11 with a charging current which is proportional to the current in the load circuit, but is independent of the voltage across the capacitor 11, a bistable 10 which is triggered each time the voltage of capacitor 11 reaches a given value so that capacitor 11 is discharged by a transistor 12, and a counter 6 which advances by one unit after a given number (e.g. one) of discharges of capacitor 11. The charging current of battery 1 may be monitored by a second such counting arrangement to allow the state of battery charge to be deduced, or one up/down counter may be arranged to indicate this. <IMAGE>
GB7914967A 1978-05-02 1979-04-30 Ampere-hour meters Expired GB2020436B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7804981A SE411962B (en) 1978-05-02 1978-05-02 DEVICE FOR META AND RECORD OF NUMBER OF AMPER HOURS IN AN ELECTRIC CIRCUIT

Publications (2)

Publication Number Publication Date
GB2020436A true GB2020436A (en) 1979-11-14
GB2020436B GB2020436B (en) 1982-08-04

Family

ID=20334794

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7914967A Expired GB2020436B (en) 1978-05-02 1979-04-30 Ampere-hour meters

Country Status (5)

Country Link
DK (1) DK181479A (en)
FI (1) FI67762C (en)
GB (1) GB2020436B (en)
NO (1) NO791438L (en)
SE (1) SE411962B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2199148A (en) * 1986-10-18 1988-06-29 Husky Computers Ltd Battery charge state monitor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2199148A (en) * 1986-10-18 1988-06-29 Husky Computers Ltd Battery charge state monitor
GB2199148B (en) * 1986-10-18 1990-12-05 Husky Computers Ltd Battery charge state monitor

Also Published As

Publication number Publication date
GB2020436B (en) 1982-08-04
DK181479A (en) 1979-11-03
NO791438L (en) 1979-11-05
SE7804981L (en) 1979-11-03
FI791416A (en) 1979-11-03
FI67762B (en) 1985-01-31
SE411962B (en) 1980-02-11
FI67762C (en) 1985-05-10

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee