EP3853626A1 - Verfahren zur überwachung eines energiespeichersystems - Google Patents
Verfahren zur überwachung eines energiespeichersystemsInfo
- Publication number
- EP3853626A1 EP3853626A1 EP19779763.2A EP19779763A EP3853626A1 EP 3853626 A1 EP3853626 A1 EP 3853626A1 EP 19779763 A EP19779763 A EP 19779763A EP 3853626 A1 EP3853626 A1 EP 3853626A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- energy storage
- storage system
- voltage
- monitoring
- current
- 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.)
- Withdrawn
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000012544 monitoring process Methods 0.000 title claims abstract description 19
- 230000008859 change Effects 0.000 claims abstract description 5
- 238000012983 electrochemical energy storage Methods 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 6
- 238000004590 computer program Methods 0.000 claims description 4
- 230000001939 inductive effect Effects 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 2
- 230000000977 initiatory effect Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 230000014759 maintenance of location Effects 0.000 claims 1
- 230000001172 regenerating effect Effects 0.000 claims 1
- 230000008569 process Effects 0.000 description 8
- 230000008901 benefit Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 230000015654 memory Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- 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]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
-
- 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- 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
- H02J7/00304—Overcurrent protection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the invention is based on a method for monitoring an energy storage system with a plurality of energy storage strings, comprising a plurality of parallel-connected electrochemical energy stores, an electrochemical energy storage system, a use of the energy storage system and a use of the method according to the preamble of independent claims.
- battery assemblies or modules are often used which are made up of a parallel and series connection of a large number of battery cells. According to the state of the art, cylindrical applications are used in numerous applications
- Battery cells for example of the type 18650, are used.
- the modules have their own monitoring, for example a measurement of battery cell voltages.
- control device for performing further functions, such as, for example, calculating battery states.
- modules can either be integrated alone in an electric drive train or in the form of a larger battery system by connecting these modules in parallel and / or in series.
- Such a module usually consists of a large number of individual battery cells.
- parallel strings with battery cells connected in parallel, hereinafter referred to as parallel strings
- the measurement initially does not allow a check to be made as to whether all the battery cells are actually connected to the battery cell network with low resistance and are still fully functional.
- a disadvantage of such modules is that, according to the prior art, reliable single cell monitoring within a parallel line is difficult to present.
- US 2004/0001996 discloses a battery pack containing a plurality of parallel blocks, each of which has a plurality of cells connected in parallel, in which the voltage and capacity of each parallel block of the battery pack is determined before and after discharge, and one Anomaly of the cells is determined based on the change in the voltage of each parallel block.
- JP 2009/216448 discloses an anomaly detection device for a battery pack that detects the disconnection or breakage of cell connectors.
- the method according to the invention has the following steps:
- the method according to the invention further comprises the following step: d. Initiation of measures, in particular reduction of a maximum permissible charge or discharge current, in order to ensure that the energy storage system is operated within permissible operating limits.
- the energy storage system can be put into a safe operating state and, for example, an increased aging of the energy stores can be counteracted.
- the method according to the invention further comprises the following step:
- steps c to e can be carried out in any order, repeatedly, one after the other and / or simultaneously.
- the charge balancing requirement between the energy storage lines is determined using a resistive, capacitive and / or inductive charge balancing method.
- the electrochemical energy storage system with a plurality of energy storage strings, comprising a plurality of electrochemical energy stores connected in parallel, at least one sensor for detecting an electrical voltage and at least one means, in particular an electronic battery management control device, which is set up to carry out the steps of the method according to the invention.
- the battery management control device advantageously comprises a computer program, comprising commands which cause the electrochemical energy storage system to carry out the method according to the invention.
- the computer program is advantageously stored on a machine-readable storage medium.
- the electrochemical energy storage system according to the invention is advantageously used for electric vehicles, hybrid vehicles, plug-in hybrid vehicles, fuel cell vehicles, for example with an energy store for boosting, pedelecs or e-bikes, for portable devices for telecommunications or data processing, for electrical ones Hand tools or kitchen machines, as well as used in stationary memories for storing, in particular, regeneratively obtained electrical energy.
- the method according to the invention for monitoring an energy storage system is advantageously used for an end-of-band control of an electrochemical energy storage system. This enables quality control of a manufacturing process of the electrochemical energy storage system to be carried out, for example to check welding processes of electrical connections between electrochemical energy stores.
- FIG. 1 is a schematic representation of an energy storage system according to the prior art.
- Figure 2 is a schematic representation of a current profile
- FIG. 3a shows a schematic representation of energy storage line voltages in the fault-free case
- FIG. 3b shows a schematic representation of energy storage line voltages in the faulty case
- FIG. 4a shows a schematic of energy storage string voltages during a charging or discharging process in the fault-free case
- FIG. 4b shows a schematic of energy storage string voltages during a charging or discharging process in the faulty case.
- FIG. 1 shows a schematic representation of an energy storage system according to the prior art.
- the energy storage system 100 comprises a multiplicity of energy storage strands 101, comprising a multiplicity of electrochemical energy storages 102 connected in parallel. Electrical voltages of the energy storage strands 101 are detected by means of a multiplicity of voltage sensors Ui, U 2 , U 3 .
- FIG. 2 shows a schematic illustration of a current profile 200.
- the energy storage system 100 according to the invention has, for example, its own battery management control device which is set up to carry out the steps of the method according to the invention.
- the energy storage line voltages are typically continuously monitored during normal operation of the energy storage system 100. It is therefore only necessary in a first embodiment to store and evaluate the energy storage line voltages and / or voltage profiles of the energy storage line voltages for a corresponding period of time in a memory of the battery management control device if suitable operating conditions are present, for example during a charging or discharging process.
- a suitable operating condition in the first embodiment is, for example, if a current charging or discharging current 201 exceeds a predetermined threshold value for a certain period of time At o , Ati, At 2 , that is to say an abrupt current load occurs.
- FIG. 3a shows a schematic illustration of energy storage phase voltages 302a in the event of a current step 301a for a fault-free case 300a of the energy storage system 100.
- FIG. 3b shows a schematic illustration of energy storage line voltages 302b in the faulty case 300b of the energy storage system 100, in which exactly one energy storage device 102 is missing in a certain energy storage line 101 or is completely defective.
- the energy storage line 101 with the missing energy storage 102 shows
- a threshold can be introduced here that the amounts of cargo may differ, for example by a maximum of 10 percent.
- both the potentially different voltage profiles of the plurality of parallel energy storage strands 101 present at the current time are considered in a mutual comparison, and changes in the history of the voltage profiles of each individual energy storage strand 101.
- the voltage drop at the start of a current jump, the voltage profile during a current load and the voltage increase after the current load has decreased.
- the internal resistance of this energy storage line 101 changes, which is particularly noticeable in the event of a jump in current.
- the voltage drop in this energy storage line 101 is significantly greater than in the comparable energy storage line 101 of the energy storage system 100.
- the respective energy storage device 101 discharges or charges faster than the other energy storage devices 101 of the energy storage system 100.
- the energy storage device voltage of an energy storage device 101 with a smaller number of electrically contacting energy stores 102 therefore increases faster.
- FIG. 4a shows a schematic of energy storage string voltages 402a, 402a (1), 402a (4), 402a (6) during a charging or discharging process in the faultless case 400a of the energy storage system 100
- FIG. 4b shows a schematic representation of energy storage string voltages 402b, 402b (6) during a charging or discharging process in the faulty case 400b of the energy storage system 100.
- the curve of the energy storage string voltage 402b (FIG. 6) therefore regularly intersects the curves of the other energy storage string voltages 402b during longer discharging or charging processes.
- the number of intersection points 403 (0), 403 (1), 403 (2) is suitable as a detection method for a loss of individual energy stores 102.
- no charge equalization between the energy storage lines 101 has taken place.
- the battery management control device preferably initiates measures to react to the absence of an energy store 102 in the energy storage line 101 and to counteract it. For example, by reducing a permissible maximum current by means of a weighting factor that depends on the number of energy stores 102 that are no longer electrically connected, it can be ensured that the energy storage system 100 continues to be operated within its permissible limits and no energy store 102 in one
- a charge equalization requirement determined from the time for a charge equalization requirement of the individual energy storage strands 101, can be used as an additional criterion for error assessment or can also be used as a stand-alone evaluation standard.
- a memory of the battery management control unit records how often and for how long a charge equalization is required for the individual energy storage strings 101, that is to say the balancing of the string voltages by resistive, capacitive or inductive methods.
- the battery management system can initiate measures, in particular reducing a maximum permissible charging or discharging current, in order to ensure that the energy storage system is operated within permissible operating limits.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018215761.8A DE102018215761A1 (de) | 2018-09-17 | 2018-09-17 | Verfahren zur Überwachung eines Energiespeichersystems |
PCT/EP2019/074732 WO2020058204A1 (de) | 2018-09-17 | 2019-09-16 | Verfahren zur überwachung eines energiespeichersystems |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3853626A1 true EP3853626A1 (de) | 2021-07-28 |
Family
ID=68104561
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19779763.2A Withdrawn EP3853626A1 (de) | 2018-09-17 | 2019-09-16 | Verfahren zur überwachung eines energiespeichersystems |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3853626A1 (de) |
CN (1) | CN112714875A (de) |
DE (1) | DE102018215761A1 (de) |
WO (1) | WO2020058204A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019212909A1 (de) * | 2019-08-28 | 2021-03-04 | Audi Ag | Verfahren zum Detektieren eines Fehlers in einem Batteriesystem sowie Batteriesystem und Kraftfahrzeug |
GB2623768A (en) * | 2022-10-25 | 2024-05-01 | Autocraft Solutions Group Ltd | Method and system for determining reusability of a battery |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4019815B2 (ja) * | 2002-06-26 | 2007-12-12 | 日産自動車株式会社 | 組電池の異常診断装置および方法 |
RU2506603C2 (ru) * | 2003-07-09 | 2014-02-10 | Премиум Пауэр Корпорейшн | Устройство для контроля и зарядки выбранной группы элементов батареи |
JP5104416B2 (ja) | 2008-03-07 | 2012-12-19 | 日産自動車株式会社 | 組電池の異常検出装置 |
US9577443B2 (en) * | 2010-06-03 | 2017-02-21 | C&C Power, Inc. | Battery system and management method |
JP5235959B2 (ja) * | 2010-09-10 | 2013-07-10 | 日立ビークルエナジー株式会社 | 電池コントローラ及び電圧異常検出方法 |
DE102010042328A1 (de) * | 2010-10-12 | 2012-04-12 | Robert Bosch Gmbh | Verfahren zum Überwachen des Ladebetriebs eines Energiespeichers in einem Fahrzeug und Ladesystem zum Laden eines Energiespeichers in einem Fahrzeug |
US20120256598A1 (en) * | 2011-04-08 | 2012-10-11 | Neotec Semiconductor Ltd. | Battery Pack Detection Circuit |
GB2541419B (en) * | 2015-08-18 | 2017-11-29 | Oxis Energy Ltd | Monitoring and balancing capacity in lithium sulfur cells arranged in series |
JP2017156268A (ja) * | 2016-03-03 | 2017-09-07 | 株式会社東芝 | 電池ユニットおよび電流測定器の故障検出方法 |
CN107064803B (zh) * | 2016-12-16 | 2019-12-13 | 蔚来汽车有限公司 | 电池内短路的在线检测方法 |
-
2018
- 2018-09-17 DE DE102018215761.8A patent/DE102018215761A1/de active Pending
-
2019
- 2019-09-16 CN CN201980060765.5A patent/CN112714875A/zh active Pending
- 2019-09-16 EP EP19779763.2A patent/EP3853626A1/de not_active Withdrawn
- 2019-09-16 WO PCT/EP2019/074732 patent/WO2020058204A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
CN112714875A (zh) | 2021-04-27 |
DE102018215761A1 (de) | 2020-03-19 |
WO2020058204A1 (de) | 2020-03-26 |
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