US Patent No: 5,451,881

Number of patents in Portfolio can not be more than 2000

Method and means for adjusting battery monitor based on rate of current drawn from the battery

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Abstract

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In a preferred embodiment, a metering system for measuring and indicating the state of charge of an electrical storage battery, including: apparatus for storing a numerical value indicative of the state of charge of the battery and for providing an output voltage signal representative thereof; apparatus for detecting the terminal voltage of the battery, coupled to the apparatus for storing, and being operable to generate a function of the battery terminal voltage which is a substantially proportional fraction of the terminal voltage and to provide an input to the apparatus for storing if the function is below a threshold variable reference voltage signal; apparatus for receiving the output voltage signal and for generating the variable reference voltage signal therefrom, the variable reference voltage signal being lowered as a function of the output voltage signal as the output voltage signal indicates progressively lower states of charge; and apparatus for measuring the level of current drawn from the battery and adjusting the apparatus for receiving and generating, in proportion to the current level, such that the variable reference voltage signal will be greater or lesser depending on the current level.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
CURTIS INSTRUMENTS, INC.MT KISCO, NY34

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Finger, Eugene P Brewster, NY 23 665

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Cristec Industries (1)
4,453,129 Method for measuring the charge state of an accumulator and a device for implementing such method 5 1981
 
Curtis Instruments, Inc. (1)
4,560,937 Battery state of charge metering method and apparatus 54 1981
 
PURDUE RESEARCH FOUNDATION (1)
4,390,841 Monitoring apparatus and method for battery power supply 110 1980

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
MIDTRONICS, INC. (111)
6,351,102 Automotive battery charging system tester 117 1999
6,332,113 Electronic battery tester 121 1999
6,363,303 Alternator diagnostic system 113 1999
6,466,025 Alternator tester 101 2000
6,225,808 Test counter for electronic battery tester 117 2000
6,323,650 Electronic battery tester 123 2000
6,359,441 Electronic battery tester 107 2000
6,331,762 Energy management system for automotive vehicle 179 2000
6,445,158 Vehicle electrical system tester with encoded output 141 2000
6,329,793 Method and apparatus for charging a battery 119 2000
6,313,608 Method and apparatus for charging a battery 131 2000
6,441,585 Apparatus and method for testing rechargeable energy storage batteries 119 2000
6,304,087 Apparatus for calibrating electronic battery tester 111 2000
6,316,914 Testing parallel strings of storage batteries 128 2000
6,566,883 Electronic battery tester 86 2000
6,586,941 Battery tester with databus 84 2001
6,456,045 Integrated conductance and load test based electronic battery tester 99 2001
6,392,414 Electronic battery tester 143 2001
6,424,158 Apparatus and method for carrying out diagnostic tests on batteries and for rapidly charging batteries 113 2001
6,544,078 Battery clamp with integrated current sensor 85 2001
6,469,511 Battery clamp with embedded environment sensor 52 2001
6,633,165 In-vehicle battery monitor 67 2001
6,909,287 Energy management system for automotive vehicle 62 2001
7,198,510 Kelvin connector for a battery post 20 2001
6,707,303 Electronic battery tester 55 2001
6,696,819 Battery charge control device 53 2002
6,871,151 Electronic battery tester with network communication 60 2002
6,885,195 Method and apparatus for auditing a battery test 48 2002
6,556,019 Electronic battery tester 94 2002
7,015,674 Booster pack with storage capacitor 23 2002
6,906,522 Battery tester with battery replacement output 44 2002
6,906,523 Method and apparatus for testing cells and batteries embedded in series/parallel systems 47 2002
6,788,025 Battery charger with booster pack 60 2002
7,126,341 Automotive vehicle electrical system diagnostic device 52 2002
7,058,525 Battery test module 60 2002
7,012,433 Battery tester upgrade using software key 41 2002
6,850,037 In-vehicle battery monitor 62 2002
6,759,849 Battery tester configured to receive a removable digital module 55 2002
7,039,533 Battery test module 20 2002
6,795,782 Battery test module 61 2002
6,781,382 Electronic battery tester 53 2002
6,888,468 Apparatus and method for protecting a battery from overdischarge 57 2003
6,801,040 Electronic battery tester with battery failure temperature determination 0 2003
6,891,378 Electronic battery tester 44 2003
7,557,586 Electronic battery tester 17 2003
6,967,484 Electronic battery tester with automotive scan tool communication 40 2003
6,933,727 Electronic battery tester cable 39 2003
6,913,483 Cable for electronic battery tester 45 2003
7,723,993 Electronic battery tester configured to predict a load test result based on open circuit voltage, temperature, cranking size rating, and a dynamic parameter 17 2003
7,081,755 Battery tester capable of predicting a discharge voltage/discharge current of a battery 47 2003
7,154,276 Method and apparatus for measuring a parameter of a vehicle electrical system 18 2003
6,914,413 Alternator tester with encoded output 47 2003
6,941,234 Query based electronic battery tester 43 2003
6,919,725 Electronic battery tester/charger with integrated battery cell temperature measurement device 50 2003
7,116,109 Apparatus and method for simulating a battery tester with a fixed resistance load 42 2003
7,208,914 Apparatus and method for predicting the remaining discharge time of a battery 24 2003
7,598,699 Replaceable clamp for electronic battery tester 18 2004
8,198,900 Automotive battery charging system tester 2 2004
7,479,763 Apparatus and method for counteracting self discharge in a storage battery 17 2004
7,119,686 Theft prevention device for automotive vehicle service centers 47 2004
7,501,795 Battery charger with booster pack 15 2004
7,246,015 Alternator tester 21 2004
7,688,074 Energy management system for automotive vehicle 25 2004
7,003,410 Electronic battery tester with relative test output 42 2004
6,998,847 Electronic battery tester with data bus for removable module 40 2004
7,656,162 Electronic battery tester with vehicle type input 17 2004
7,106,070 Broad-band low-inductance cables for making Kelvin connections to electrochemical cells and batteries 39 2004
7,319,304 Shunt connection to a PCB of an energy management system employed in an automotive vehicle 20 2004
7,003,411 Electronic battery tester with network communication 57 2004
7,999,505 In-vehicle battery monitor 14 2004
7,446,536 Scan tool for electronic battery tester 31 2004
7,545,146 Apparatus and method for predicting battery capacity and fitness for service from a battery dynamic parameter and a recovery voltage differential 15 2004
7,774,151 Wireless battery monitor 18 2004
7,598,743 Battery maintenance device having databus connection 18 2005
7,034,541 Query based electronic battery tester 18 2005
7,642,786 Battery tester capable of identifying faulty battery post adapters 15 2005
7,505,856 Battery test module 19 2005
7,598,744 Scan tool for electronic battery tester 18 2005
7,772,850 Wireless battery tester with information encryption means 18 2005
7,710,119 Battery tester that calculates its own reference values 22 2005
7,398,176 Battery testers with secondary functionality 20 2006
7,295,936 Electronic battery tester with relative test output 17 2006
7,363,175 Query based electronic battery tester 15 2006
7,777,612 Theft prevention device for automotive vehicle service centers 20 2006
7,595,643 Apparatus and method for simulating a battery tester with a fixed resistance load 17 2006
7,705,602 Automotive vehicle electrical system diagnostic device 28 2006
7,425,833 Broad-band low-inductance cables for making Kelvin connections to electrochemical cells and batteries 16 2006
7,642,787 Automotive vehicle electrical system diagnostic device 18 2006
7,619,417 Battery monitoring system 20 2006
8,674,711 Method and apparatus for measuring a parameter of a vehicle electrical system 0 2006
7,706,991 Alternator tester 17 2007
7,977,914 Battery maintenance tool with probe light 2 2007
7,808,375 Battery run down indicator 21 2008
8,237,448 Battery testers with secondary functionality 3 2008
8,306,690 Battery tester for electric vehicle 4 2008
8,513,949 Electronic battery tester or charger with databus connection 3 2008
8,164,343 Method and apparatus for measuring a parameter of a vehicle electrical system 6 2008
7,728,597 Electronic battery tester with databus 17 2008
8,203,345 Storage battery and battery tester 5 2008
8,442,877 Simplification of inventory management 2 2009
8,436,619 Integrated tag reader and environment sensor 2 2009
8,344,685 System for automatically gathering battery information 3 2009
8,754,653 Electronic battery tester 0 2009
7,940,052 Electronic battery test based upon battery requirements 2 2010
8,493,022 Automotive vehicle electrical system diagnostic device 4 2010
7,924,015 Automotive vehicle battery test system 17 2010
8,738,309 Battery pack maintenance for electric vehicles 0 2010
8,872,516 Electronic battery tester mounted in a vehicle 0 2011
8,872,517 Electronic battery tester with battery age input 0 2011
8,674,654 In-vehicle battery monitor 0 2011
8,704,483 System for automatically gathering battery information 0 2012
 
VILLANOVA UNIVERSITY (5)
6,456,988 Method for determining state-of-health using an intelligent system 13 1998
6,011,379 Method for determining state-of-charge using an intelligent system 41 1998
6,691,095 Method and system to determine state-of-health of a fuel cell using an intelligent system 1 2002
6,668,247 Method and system for determining state-of-health of a lead-acid defibrillator battery using an intelligent system 4 2002
7,051,008 Method and system for determining state-of-health of a nickel-metal hydride battery using an intelligent system 2 2002
 
INTERSTATE BATTERY SYSTEM OF AMERICA, INC. (3)
6,930,485 Electronic battery tester with battery failure temperature determination 45 2003
7,498,767 Centralized data storage of condition of a storage battery at its point of sale 20 2006
7,791,348 Battery tester with promotion feature to promote use of the battery tester by providing the user with codes having redeemable value 17 2007
 
FUJITSU LIMITED (2)
5,841,284 Apparatus for monitoring power of battery to supply electric power to load 15 1995
6,054,861 Apparatus for monitoring power of battery to supply electric power to load 15 1998
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (2)
5,539,318 Residual capacity meter for electric car battery 35 1993
6,836,122 Deterioration degree calculating apparatus and deterioration degree calculating method for a battery 7 2003
 
BAXTER INTERNATIONAL INC. (1)
5,764,034 Battery gauge for a battery operated infusion pump 71 1996
 
CANON KABUSHIKI KAISHA (1)
6,150,823 Battery charge detecting variable loads 23 1992
 
Curtis Instruments, Inc. (1)
6,380,716 Condition monitoring of opportunity charged batteries 2 2000
 
Flight Systems, Inc. (1)
5,698,965 Apparatus and method for determining the current state of charge of a battery by monitoring battery voltage increases above and decreases below a threshold 30 1996
 
FORD GLOBAL TECHNOLOGIES, INC. (1)
6,211,653 Method and apparatus for measuring the state-of-charge of a battery 4 1999
 
FRIWO GERAETEBAU GMBH (1)
6,906,498 Device and method for the detection of a charging voltage 1 2003
 
FUJI JUKOGYO KABUSHIKI KAISHA (1)
5,781,013 Battery management system for electric vehicle 7 1995
 
GENERAL ELECTRIC COMPANY (1)
7,960,855 System and method for providing power control of an energy storage system 1 2004
 
GM GLOBAL TECHNOLOGY OPERATIONS LLC (1)
6,356,083 State of charge algorithm for a battery 37 2001
 
HOSPIRA, INC. (1)
5,994,876 Battery capacity measurement circuit 19 1997
 
Interstate Battery System of America (1)
7,940,053 Battery tester with promotion feature 12 2010
 
KEITHLEY INSTRUMENTS, INC. (1)
7,276,893 Automatic ranging current shunt 2 2005
 
MAEDA METAL INDUSTRIES, LTD. (1)
7,135,791 Electric tightening device 3 2005
 
MEMSIC TRANSDUCER SYSTEMS CO., LTD. (1)
7,554,299 Battery monitoring circuit and method 3 2005
 
MERIDIAN WIRELESS TECHNOLOGIES, INC. (1)
5,570,025 Annunciator and battery supply measurement system for cellular telephones 28 1994
 
MIDRONICS, INC. (1)
7,408,358 Electronic battery tester having a user interface to configure a printer 16 2003
 
NEC CORPORATION (1)
6,038,515 Portable information terminal apparatus capable of correctly detecting power supply voltage 8 1997
 
OMRON CORPORATION (1)
5,726,505 Device to prevent reverse current flow, rectifier device and solar generator system 21 1996
 
OPERATING TECHNICAL ELECTRONICS, INC. (1)
5,668,465 Battery voltage monitor and disconnection circuit 14 1996
 
PATENT LEATHER LLC (1)
6,791,341 Current derivative sensor 8 2002
 
QUANTA COMPUTER INC. (1)
8,606,533 Battery gas-gauge circuit and method thereof 0 2010
 
SAGEM AVIONICS, LLC (1)
8,810,354 Binary coded decimal resistive load and network 0 2013
 
SCHLUMBERGER TECHNOLOGY CORPORATION (1)
7,105,249 Pressure-compensated downhole battery 10 2003
 
SGS-THOMSON MICROELECTRONICS S.R.L. (1)
6,377,053 Device for detecting short-circuits 5 1998
 
STEWART, ALBERT E. (1)
5,869,951 Battery management system for electric vehicle 21 1998
 
SUMITOMO WIRING SYSTEMS, LTD. (1)
6,701,262 Current detecting circuit 2 2001
 
SUN MICROSYSTEMS, INC. (1)
7,054,787 Embedded integrated circuit aging sensor system 4 2003
 
TEXAS INSTRUMENTS INCORPORATED (1)
6,832,171 Circuit and method for determining battery impedance increase with aging 68 2003
 
UNWIRED PLANET, LLC (1)
5,929,604 Battery-discharge-protection system for electronic accessories used in vehicles containing a battery 26 1997
 
VB AUTOBATTERIE GMBH (1)
6,967,466 Method for determining the amount of charge which can be drawn on a storage battery, and monitoring device for a storage battery 29 2003
 
VITAL INNOVATIONS, INC. (1)
6,222,370 Universal battery monitor 12 1999
 
YAZAKI CORPORATION (1)
6,489,786 Non-isolated type voltage sensor 3 2000
 
Other [Check patent profile for assignment information] (9)
6,313,607 Method and apparatus for evaluating stored charge in an electrochemical cell or battery 116 1999
6,294,897 Method and apparatus for electronically evaluating the internal temperature of an electrochemical cell or battery 202 2000
6,294,896 Method and apparatus for measuring complex self-immitance of a general electrical element 117 2000
6,417,669 Suppressing interference in AC measurements of cells, batteries and other electrical elements 103 2001
6,495,990 Method and apparatus for evaluating stored charge in an electrochemical cell or battery 103 2001
6,466,026 Programmable current exciter for measuring AC immittance of cells and batteries 102 2001
6,737,831 Method and apparatus using a circuit model to evaluate cell/battery parameters 63 2002
6,621,272 Programmable current exciter for measuring AC immittance of cells and batteries 50 2002
6,806,716 Electronic battery tester 56 2004