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1. WO2021040900 - LOCATION-DETERMINANT FAULT MONITORING FOR BATTERY MANAGEMENT SYSTEM

Publication Number WO/2021/040900
Publication Date 04.03.2021
International Application No. PCT/US2020/042004
International Filing Date 14.07.2020
IPC
H02J 7/00 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
7Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H01M 10/44 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
44Methods for charging or discharging
G01R 31/36 2020.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge
G01R 31/00 2006.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
CPC
B60L 3/0046
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES
3Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
0023Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
0046relating to electric energy storage systems, e.g. batteries or capacitors
B60L 3/0069
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES
3Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
0023Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
0069relating to the isolation, e.g. ground fault or leak current
B60L 58/18
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES
58Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
10for monitoring or controlling batteries
18of two or more battery modules
G01R 27/26
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
27Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
26Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; ; Measuring impedance or related variables
G01R 31/006
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
005Testing of electric installations on transport means
006on road vehicles, e.g. automobiles or trucks
G01R 31/371
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
371with remote indication, e.g. on external chargers
Applicants
  • STAFL SYSTEMS, LLC [US]/[US]
Inventors
  • STAFL, Erik
Agents
  • BERTOGLIO, Brad
Priority Data
62/891,22623.08.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) LOCATION-DETERMINANT FAULT MONITORING FOR BATTERY MANAGEMENT SYSTEM
(FR) SURVEILLANCE DE DÉFAUT POUR SYSTÈME DE GESTION DE BATTERIE
Abstract
(EN)
Battery management systems and methods for operation of same are provided. A first switchable resistance (110) may be connected between a cell stack positive end (101A) and ground. A second switchable resistance (114) may be connected between a cell stack negative end (101B) and ground. The switches (111, 115) for each resistance may be alternately opened and closed, with comparison of the resulting currents through each resistance (110, 114) being indicative of a location of isolation leakage current within a battery system cell stack (100), and/or the magnitude of isolation leakage current. Currents through the first and/or second switchable resistances (110, 114) may also be indicative of Y capacitance (130). The first and second switchable resistances (110, 114) may further be used to reduce energy stored by Y capacitance (130).
(FR)
L'invention concerne des systèmes de gestion de batterie et des procédés de fonctionnement associés. Une première résistance commutable (110) peut être connectée entre une extrémité positive d'empilement de cellules (101A) et la masse. Une seconde résistance commutable (114) peut être connectée entre une extrémité négative d'empilement de cellules (101B) et la masse. Les commutateurs (111, 115) pour chaque résistance peuvent être alternativement ouverts et fermés, avec une comparaison des courants résultants à travers chaque résistance (110, 114) étant indicative d'un emplacement de courant de fuite d'isolation à l'intérieur d'un empilement de cellules de système de batterie (100), et/ou de l'amplitude du courant de fuite d'isolation. Des courants à travers les première et/ou seconde résistances commutables (110, 114) peuvent également être indicatifs de la capacité Y (130). Les première et seconde résistances commutables (110, 114) peuvent en outre être utilisées pour réduire l'énergie stockée par la capacité Y (130).
Also published as
Latest bibliographic data on file with the International Bureau