SE9904817L - Battery disconnection procedure and system - Google Patents

Battery disconnection procedure and system

Info

Publication number
SE9904817L
SE9904817L SE9904817A SE9904817A SE9904817L SE 9904817 L SE9904817 L SE 9904817L SE 9904817 A SE9904817 A SE 9904817A SE 9904817 A SE9904817 A SE 9904817A SE 9904817 L SE9904817 L SE 9904817L
Authority
SE
Sweden
Prior art keywords
battery
output voltage
disconnection procedure
battery disconnection
differentiator
Prior art date
Application number
SE9904817A
Other languages
Swedish (sv)
Other versions
SE9904817D0 (en
Inventor
Gunder Karlsson
Nils Salomonsson
Original Assignee
Emerson Energy Systems 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 Emerson Energy Systems Ab filed Critical Emerson Energy Systems Ab
Priority to SE9904817A priority Critical patent/SE9904817L/en
Publication of SE9904817D0 publication Critical patent/SE9904817D0/en
Priority to AU25710/01A priority patent/AU2571001A/en
Priority to PCT/SE2000/002685 priority patent/WO2001048496A1/en
Publication of SE9904817L publication Critical patent/SE9904817L/en

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]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • 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]
    • G01R31/385—Arrangements for measuring battery or accumulator variables
    • G01R31/386—Arrangements for measuring battery or accumulator variables using test-loads
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00306—Overdischarge protection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

A battery disconnect system includes means (30) for measuring the current output voltage (U) of a battery. A differentiator (32) determines the first time derivative of the output voltage. A second differentiator (34) determines the second time derivative of the output voltage. A reference voltage (UREF) is calculated from the first and second derivatives. Load is disconnected from the battery when the output voltage falls below the reference voltage.
SE9904817A 1999-12-28 1999-12-28 Battery disconnection procedure and system SE9904817L (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9904817A SE9904817L (en) 1999-12-28 1999-12-28 Battery disconnection procedure and system
AU25710/01A AU2571001A (en) 1999-12-28 2000-12-28 Battery disconnect method and system
PCT/SE2000/002685 WO2001048496A1 (en) 1999-12-28 2000-12-28 Battery disconnect method and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9904817A SE9904817L (en) 1999-12-28 1999-12-28 Battery disconnection procedure and system

Publications (2)

Publication Number Publication Date
SE9904817D0 SE9904817D0 (en) 1999-12-28
SE9904817L true SE9904817L (en) 2001-06-29

Family

ID=20418339

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9904817A SE9904817L (en) 1999-12-28 1999-12-28 Battery disconnection procedure and system

Country Status (3)

Country Link
AU (1) AU2571001A (en)
SE (1) SE9904817L (en)
WO (1) WO2001048496A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10886753B2 (en) 2017-02-13 2021-01-05 O2Micro Inc. Systems and methods for managing a battery pack

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911349A (en) * 1974-11-07 1975-10-07 Esb Inc Battery charger
US5278509A (en) * 1992-02-03 1994-01-11 At&T Bell Laboratories Method for monitoring battery discharge by determining the second derivative of battery voltage over time
US5341503A (en) * 1992-04-16 1994-08-23 International Business Machines Corporation Battery operated computer having improved battery gauge and system for measuring battery charge
FR2694660B1 (en) * 1992-08-05 1994-10-07 Merlin Gerin Battery cell failure detection device.
EP0922232A1 (en) * 1997-05-27 1999-06-16 Koninklijke Philips Electronics N.V. Battery-powered electrical device

Also Published As

Publication number Publication date
AU2571001A (en) 2001-07-09
SE9904817D0 (en) 1999-12-28
WO2001048496A1 (en) 2001-07-05

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Legal Events

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