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1. WO2020064221 - DETECTION OF ABNORMAL SELF-DISCHARGE OF LITHIUM ION CELLS, AND BATTERY SYSTEM

Publication Number WO/2020/064221
Publication Date 02.04.2020
International Application No. PCT/EP2019/072171
International Filing Date 19.08.2019
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
B60L 58/22 2019.01
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR 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
22Balancing the charge of battery modules
G01R 31/392 2019.01
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
392Determining battery ageing or deterioration, e.g. state of health
G01R 31/396 2019.01
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
396Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
H01M 10/42 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
CPC
B60L 2240/547
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES
2240Control parameters of input or output; Target parameters
40Drive Train control parameters
54related to batteries
547Voltage
B60L 2240/80
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES
2240Control parameters of input or output; Target parameters
80Time limits
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 3/12
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
12Recording operating variables ; ; Monitoring of operating variables
B60L 58/22
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
22Balancing the charge of battery modules
G01R 31/392
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]
392Determining battery ageing or deterioration, e.g. state of health
Applicants
  • BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT [DE]/[DE]
Inventors
  • SCHARNER, Sebastian
  • DANDL, Sonia
  • SCHMIDT, Jan Philipp
Priority Data
10 2018 216 356.125.09.2018DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) DETEKTION ABNORMALER SELBSTENTLADUNG VON LITHIUMIONENZELLEN UND BATTERIESYSTEM
(EN) DETECTION OF ABNORMAL SELF-DISCHARGE OF LITHIUM ION CELLS, AND BATTERY SYSTEM
(FR) DÉTECTION D’UNE AUTO-DÉCHARGE ANORMALE DE CELLULES LITHIUM-ION ET SYSTÈME DE BATTERIE
Abstract
(DE)
Die vorliegende Erfindung betrifft ein Verfahren zur Detektion abnormaler Selbstentladung in einem Batteriesystem durch Überwachung der Balancing-Ladung pro Zelle sowie ein Batteriesystem, das für den Einsatz dieses Verfahrens konfiguriert ist. Das erfindungsgemäße Verfahren ermöglicht eine Vorhersage für die Wahrscheinlichkeit des Auftretens eines sicherheitskritischen Zustands wie z.B. eines inneren Kurzschlusses, so dass frühzeitig geeignete Gegenmaßnahmen getroffen werden können.
(EN)
The present invention relates to a method for detecting abnormal self-discharge in a battery system by monitoring the balancing charge for each cell and to a battery system which is configured to use this method. The method according to the invention makes it possible to predict the probability of the occurrence of a safety-critical state, for example an internal short circuit, with the result that suitable countermeasures can be taken in good time.
(FR)
La présente invention a trait à un procédé pour détecter une auto-décharge dans un système de batterie par la surveillance de la charge d’équilibrage par cellule, ainsi qu’à un système de batterie qui est configuré pour mettre en œuvre ce procédé. Le procédé selon l’invention permet de prévoir la probabilité de l’apparition d’un état critique pour la sécurité, tel que, par exemple, d’un court-circuit interne, de sorte que des contre-mesures appropriées peuvent être prises à temps.
Also published as
Latest bibliographic data on file with the International Bureau