WO2017209686A1 - Dispositif et procédé pour charger une source de tension - Google Patents

Dispositif et procédé pour charger une source de tension Download PDF

Info

Publication number
WO2017209686A1
WO2017209686A1 PCT/SE2017/050588 SE2017050588W WO2017209686A1 WO 2017209686 A1 WO2017209686 A1 WO 2017209686A1 SE 2017050588 W SE2017050588 W SE 2017050588W WO 2017209686 A1 WO2017209686 A1 WO 2017209686A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage source
leg
terminal
legs
semiconductor switch
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.)
Ceased
Application number
PCT/SE2017/050588
Other languages
English (en)
Inventor
Zoran Stanisic
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Megger Sweden AB
Original Assignee
Megger Sweden 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 Megger Sweden AB filed Critical Megger Sweden AB
Publication of WO2017209686A1 publication Critical patent/WO2017209686A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • 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]
    • 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]
    • G01R31/3644—Constructional arrangements
    • G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
    • 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]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • 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
    • 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]
    • G01R31/392—Determining battery ageing or deterioration, e.g. state of health
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/855—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/90—Regulation of charging or discharging current or voltage
    • H02J7/94—Regulation of charging or discharging current or voltage in response to battery current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/90—Regulation of charging or discharging current or voltage
    • H02J7/96—Regulation of charging or discharging current or voltage in response to battery voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/90—Regulation of charging or discharging current or voltage
    • H02J7/971—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/80—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including monitoring or indicating arrangements
    • H02J7/82—Control of state of charge [SOC]
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates generally to loading of voltage sources and more particularly to a device and a method for loading a voltage source wherein the load current is controlled.
  • Batteries are used to ensure that critical electrical equipment is always on. There are many places where batteries are used and some of the applications for batteries include electric generating stations and substations for protection and control of switches and relays, telephone systems to support phone service, industrial applications for protection and control and back up of computers.
  • Batteries are complex chemical mechanisms. They have numerous components from grids, active material, posts, jar and cover, etc. - any one of which can fail. As with all manufacturing processes, no matter how well they are made, there is still some amount of uncertainty related to batteries.
  • a battery is two dissimilar metallic materials in an electrolyte.
  • a good battery maintenance program may prevent, or at least, reduce the costs and damage to critical equipment due to an AC mains outage, for example.
  • Batteries come in various configurations themselves. Add to that the many ways that they can be arranged and in is realized that the number of possible configurations is endless. Voltage plays the biggest part in a battery configuration. Batteries have multiple posts for higher current draws. The more current needed from a battery, the bigger the connections must be. That includes posts, intercell connectors and bus bars and cables. The many configurations of batteries mean that testing equipment must be adaptable to different voltages and currents etc.
  • IEEE 450 for flooded lead-acid
  • IEEE 1 188 for sealed lead-acid
  • IEEE 1 106 for nickel-cadmium
  • Capacity test is the only way to get an accurate value on the actual capacity of the battery. While used regularly it can be used for tracking the battery's health and actual capacity and estimating remaining life of the battery. When the battery is new its capacity might be slightly lower than specified. This is normal.
  • Batteries can also be tested at a shorter time than their duty cycle, for instance at 1 hour. Then the current rate has to be increased. An advantage is that less capacity is drained from the battery (valid for lead-acid) and it requires less time to recharge it. Also less man-hour is needed for the test. [001 1 ] Tests are thus usually conducted at constant current, but constant power, constant resistance or a pre-selected load profile can also be used. This implies that the discharge current must be controlled in a flexible and still reliable way.
  • An object of the present invention is therefore to provide a device and a method for loading a voltage source wherein the load current is controlled.
  • a device connectable to a DC voltage source for loading the DC voltage source, the DC voltage source having a positive terminal and a negative terminal, the device comprising: a first terminal connectable to the positive terminal of the DC voltage source, a second terminal connectable to the negative terminal of the DC voltage source, a plurality of legs comprising a first leg, a second leg and further legs until a last leg, wherein the plurality of legs are connected in parallel between the first terminal and the second terminal, wherein each leg comprises, a first terminal connectable to the positive terminal of the DC voltage source, a second terminal connectable to the negative terminal of the DC voltage source, a plurality of legs comprising a first leg, a second leg and further legs until a last leg, wherein the plurality of legs are connected in parallel between the first terminal and the second terminal, wherein each leg comprises, a first terminal connectable to the positive terminal of the DC voltage source, a second terminal connectable to the negative terminal of the DC voltage source, a plurality of legs comprising a first leg, a second
  • semiconductor switch element having a first end and a second end, wherein the first end of the first semiconductor switch element is connected to the first terminal, a second semiconductor switch element having a first end and a second end, wherein the second end of the second semiconductor switch element is connected to the second terminal, a resistive element connected, at a first node, to the second end of the first semiconductor switch element, and a second node, to the first end of the second semiconductor switch element, and a rectifier element having an anode and a cathode, wherein the anode of the rectifier element is connected to the second node, wherein the cathode of each of the rectifier elements is connected to the first node of a subsequent leg, wherein the cathode of a last leg is connected to the first node of the first leg.
  • the number of legs is three.
  • the number of legs is eight.
  • each of the semiconductor switch elements comprises a transistor with an anti-parallel diode.
  • each of the resistive elements comprises a resistor connected in series with a parasite inductor.
  • a method for loading a voltage source by means of the device comprising the following steps: a) determining operating parameters for discharging the DC voltage source, b) measuring the voltage of the DC voltage source, c) determining a control scheme based on the operating parameters and the measured voltage of the DC voltage source, d) measuring physical entities, e) adjusting the control scheme based on the measured physical entities, and repeating steps d) and e) until an end condition is fulfilled.
  • the operating parameters are chosen from the following: voltage, discharge current, discharge time.
  • an effective current in each leg is controlled by adjusting the duty cycle of the semiconductor switch elements.
  • an effective current is conducted in two or more legs at a time, with a cyclical commutation between the different legs.
  • a switching frequency per leg is less than 20 kHz.
  • Fig. 1 a is a circuit diagram of a first embodiment of a device according to the invention in a first mode of operation, the device having tree legs.
  • Fig. 1 b is the same circuit diagram as in Fig. 1 a but showing a second mode of operation
  • Fig. 1 c is the same circuit diagram as in Fig. 1 a but showing a third mode of operation
  • Fig. 2a is a curve diagram showing the currents flowing in the device of Figs. 1 a-c in the first mode of operation
  • Fig. 2b is a curve diagram showing the combined currents flowing in the device of Figs. 1 a-c in the first mode of operation
  • Figs. 3a-c are diagrams showing different timings of the switches shown in Figs. 1 a-c,
  • Fig 4 is a circuit diagram of a second embodiment of a device according to the invention, having eight legs,
  • Fig. 5 shows an example of serially connecting two devices according to the invention
  • Fig. 6 shows a device adapted to provide a variable voltage output. Description of embodiments
  • Fig. 1 a the layout of a device for loading a DC voltage source, generally designated 1 , is shown.
  • the device is connectable to a DC voltage source, referenced DC, having a positive terminal and a negative terminal.
  • the device has a first terminal P connectable to the positive terminal of the DC voltage source and a second terminal N connectable to the negative terminal of the DC voltage source.
  • a plurality of legs 10a, 10b, 10c, in the embodiment shown in Figs. 1 a-c three legs, enclosed by dashed lines, are connected in parallel between the first terminal P and the second terminal N.
  • Each leg comprises a first switch element 1 1 a, 1 1 b, and 1 1 c, respectively, having a first end and a second end, wherein the first end of the first switch element is connected to the first terminal P.
  • Each leg also comprises a second switch element 13a, 13b, and 13c, respectively, having a first end and a second end, wherein the second end of the second switch element is connected to the second terminal P.
  • each leg a resistive element 12a, 12b, and 12c, respectively, is connected, at a first node Pa, Pb, and Pc, respectively, to the second end of the first switch element, and a second node Na, Nb, and Nc, respectively, to the first end of the second switch element.
  • a rectifier element 14a, 14b, 14c having an anode and a cathode, is connected to the respective second node by means of its anode.
  • the cathode of each of the rectifier elements is connected to the first node of a subsequent leg, wherein the cathode of a last leg is connected to the first node of the first leg.
  • the rectifier element 14c is connected between the third and the first legs.
  • Each of the switch elements 1 1 a-c and 13a-c comprises in the preferred embodiment a semiconductor switch, such as a transistor with an anti-parallel diode. Each switch element is controlled by control electronics (not shown in the figures.
  • Each of the resistive elements 12a, 12b, and 12c comprises in the preferred embodiment a resistor connected in series with a parasite inductor 16a, 16b and 16c. This results in a time constant for the current changes. Also, it is preferred to provide flywheel diodes 15a, 15b and 15c for handling reverse currents.
  • the device 1 operates as follows. First, it is connected by means of the terminals P, N to a battery source DC to be tested, i.e., to be discharged in a controlled way. Different parameters are entered into the control electronics, such as voltage, discharge current, discharge time etc. Based on these parameters, an operating mode is selected to obtain the best possible discharge scheme.
  • the discharge current is determined by the voltage V across the DC voltage source and the resistance of the resistive elements 12a, 12b, 12c.
  • the effective resistance of these resistive elements will be determined by the operation mode, as will be described in the following.
  • the resistive elements can be connected in different configurations depending on the state of the different switches 1 1 a-c and 13a-c, i.e. if they are ON (closed, conducting current) or OFF (open, interrupting current). This means that the resistive elements can be connected in parallel, in series, or a combination of in parallel and in series.
  • Fig. 1 a an operation mode is shown wherein all switches are on, conducting current through each leg 10a-c from the positive terminal P to the negative terminal N, shown by arrows in the figure. This means that the three resistive elements 12a-c are connected in parallel. Assuming that each resistive element has the resistance value R, the resulting current I will be the following:
  • Fig 1 b an operation mode is shown wherein the switches 1 1 a, 13b, 1 1 c, and 13c are ON and the remaining switches 13a and 1 1 b are OFF.
  • the current is conducted from the positive terminal, through the first resistive element 12a, via the rectifying element 14a, and through the second resistive element 12b to the negative terminal N.
  • the first and second resistive elements 12a, 12b are connected in series.
  • the third resistive element 12c in the third leg 10c conducts current from the positive terminal P to the negative terminal N.
  • Fig 1 c an operation mode is shown wherein the switches 1 1 a and 13c are ON and the remaining switches 13a, 1 1 b, 13b, and 1 1 c are OFF.
  • the current is conducted from the positive terminal, through the first resistive element 12a, via the first rectifying element 14a, through the second resistive element 12b, via the second rectifying element 14b, and via the third resistive element 13c to the negative terminal N.
  • the total current I loading the voltage source is the sum of the currents in the three legs 10a-c, i.e., la + lb + lc .
  • the effective current in each leg can also be controlled by adjusting the duty cycle of the switches. Referring again to Fig. 1 a, instead of conducting current in all three legs simultaneously, current can be conducted first in the first leg 10a, then in the second leg 10b, then in the third leg 10c, then again in the first leg 10a and so on. Alternatively, the effective current can be conducted in two or more legs at a time, with a cyclical commutation between the different legs.
  • current can be conducted first in the first and second legs 10a, 10b, then in the second and third legs 10b, 10c, then in the third and first legs 10c, 10a, then again in the first and second legs 10a, 1 0b and so on.
  • all semiconductor switches are equally used, dissipating same power, no matter of chosen topology, which results in uniform heat spreading and reduced heat needed to be dissipated from each of the components included in the device.
  • FIG. 2a An example of the currents is illustrated in Figs. 2a and 2b.
  • Fig. 2a show the different currents la, lb, and lc, conducted through the first, second, and third leg 10a, 10b, 10c, respectively.
  • Figs. 3a-c Different cyclic switching schemes are illustrated in Figs. 3a-c.
  • Transistor steering in Fig. 3a is used for highest discharging current, resulting in highest frequency of current ripple.
  • transistors can be operated as on Fig. 3b and for lowest discharging current and highest battery voltage, transistor switches are operated as on Fig. 3c.
  • adequate current filter can be dimensioned and
  • operating parameters such as discharge duration, for example 1 h, discharge current etc. are
  • the voltage of the voltage source is then measured by means of a voltage meter.
  • This voltage meter can be a separate measuring device but is preferably integrated in the device 1 for loading the voltage source.
  • a control scheme is then determined based on the measured voltage and the operating parameters. Switching of the switches according to the control scheme is then initiated. Different physical entities, such as the voltage V across the voltage source, the total current I, the current in the different legs, the temperature at different locations, such as the switches and the resistive elements, etc. are continuously monitored and the control scheme is adjusted in dependence of the values of the different physical entities. For example, when the voltage V across the voltage source decreases over time as it is discharged, in order to maintain a constant current I, the effective resistance of the resistive elements must be decreased. This can be effected by adjusting the duty cycle of the different switches and/or changing the operation mode.
  • the physical entities are measured either continuously or with regular intervals and the control scheme is adjusted based on the measured physical entities until an end condition is fulfilled. This can be that a predetermined time has lapsed from the start of the discharge, the voltage of the DC source has dropped below a threshold value, an alarm condition etc.
  • FIG. 4 An alternative embodiment of the device according to the invention is shown in Fig. 4.
  • the general structure is similar to the one described above with reference to Figs. 1 a-c, but in this case the device is provided with eight legs 10a- h instead of three. This number: 2 x 2 x 2, allows a number of suitable switching schemes.
  • More than one device can be connected in series or parallel, allowing handling of higher voltages or higher current.
  • One example thereof is shown in Fig. 5, wherein the positive terminal of a master device 1 is connected to the positive pole of the voltage source.
  • the negative pole of the master device is connected to the positive terminal P of a slave device 1 '.
  • the negative terminal N of the slave device is connected to the negative pole of the voltage source. In this way, twice the voltage level can be handled as compared to the voltage level handled by a single device, assuming that the master and slave devices have the same voltage ratings.
  • a different application can be obtained by replacing the restive elements with transformers or DC bridges, allowing power to be input into the device resulting in a variable DC output voltage between the positive terminal P and the negative terminal N.
  • An example of such an embodiment is shown in Fig. 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Dc-Dc Converters (AREA)

Abstract

Un dispositif selon l'invention peut être connecté à une source de tension continue pour charger la source de tension continue. Le dispositif comprend une pluralité de pattes (10a, 10b, 10c) connectées en dérivation entre une première borne et une seconde borne, chaque patte comprenant un premier élément de commutation à semi-conducteur (11a, 11b, 11c), un second élément de commutation à semi-conducteur (13a, 13b, 13c), un élément résistif (12a, 12b, 12c) connecté et un élément redresseur (14a, 14b, 14c) possédant une anode et une cathode. La cathode de chacun des éléments redresseurs est connectée à un premier nœud d'une patte suivante, la cathode d'une dernière patte étant connectée au premier nœud de la première patte. L'invention concerne en outre un dispositif de charge d'une source de tension dans lequel le courant de charge est régulé. L'invention concerne enfin un procédé correspondant.
PCT/SE2017/050588 2016-06-02 2017-06-01 Dispositif et procédé pour charger une source de tension Ceased WO2017209686A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1650776-6 2016-06-02
SE1650776A SE540739C2 (en) 2016-06-02 2016-06-02 Device and method for loading a voltage source

Publications (1)

Publication Number Publication Date
WO2017209686A1 true WO2017209686A1 (fr) 2017-12-07

Family

ID=60478941

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2017/050588 Ceased WO2017209686A1 (fr) 2016-06-02 2017-06-01 Dispositif et procédé pour charger une source de tension

Country Status (2)

Country Link
SE (1) SE540739C2 (fr)
WO (1) WO2017209686A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999001918A2 (fr) * 1997-07-03 1999-01-14 Estco Energy Inc. Dispositif et systeme de gestion d'une source d'energie de batterie de secours
US20070145949A1 (en) * 2005-12-28 2007-06-28 Ntt Facilities, Inc. Secondary-battery management apparatuses, secondary-battery management method, and secondary-battery management program
WO2010108928A1 (fr) * 2009-03-25 2010-09-30 Ge Wind Energy (Norway) As Procédé et dispositif pour utiliser en alternance des convertisseurs de fréquence dans une centrale éolienne
US20120245872A1 (en) * 2011-03-22 2012-09-27 Hsien-Fang Sheng Battery tester with high precision
EP2597479A2 (fr) * 2011-11-25 2013-05-29 Honeywell International Inc. Procédé et appareil pour la détermination on-line de l'état de charge et l'état de santé
EP2704322A2 (fr) * 2012-08-31 2014-03-05 Samsung Electronics Co., Ltd Appareil de filtration de bande de base analogique pour émetteur-récepteur sans fil multibande et multimode et procédé permettant de commander l'appareil de filtration
EP2838152A1 (fr) * 2012-04-12 2015-02-18 Mitsubishi Electric Corporation Dispositif de décharge pour dispositif de stockage d'énergie électrique
US20150355281A1 (en) * 2014-06-05 2015-12-10 The Regents Of The University Of Michigan Electronic device with supervisor circuit for detecting resistance parameter of an energy storage device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999001918A2 (fr) * 1997-07-03 1999-01-14 Estco Energy Inc. Dispositif et systeme de gestion d'une source d'energie de batterie de secours
US20070145949A1 (en) * 2005-12-28 2007-06-28 Ntt Facilities, Inc. Secondary-battery management apparatuses, secondary-battery management method, and secondary-battery management program
WO2010108928A1 (fr) * 2009-03-25 2010-09-30 Ge Wind Energy (Norway) As Procédé et dispositif pour utiliser en alternance des convertisseurs de fréquence dans une centrale éolienne
US20120245872A1 (en) * 2011-03-22 2012-09-27 Hsien-Fang Sheng Battery tester with high precision
EP2597479A2 (fr) * 2011-11-25 2013-05-29 Honeywell International Inc. Procédé et appareil pour la détermination on-line de l'état de charge et l'état de santé
EP2838152A1 (fr) * 2012-04-12 2015-02-18 Mitsubishi Electric Corporation Dispositif de décharge pour dispositif de stockage d'énergie électrique
EP2704322A2 (fr) * 2012-08-31 2014-03-05 Samsung Electronics Co., Ltd Appareil de filtration de bande de base analogique pour émetteur-récepteur sans fil multibande et multimode et procédé permettant de commander l'appareil de filtration
US20150355281A1 (en) * 2014-06-05 2015-12-10 The Regents Of The University Of Michigan Electronic device with supervisor circuit for detecting resistance parameter of an energy storage device

Also Published As

Publication number Publication date
SE1650776A1 (en) 2017-12-03
SE540739C2 (en) 2018-10-30

Similar Documents

Publication Publication Date Title
Chatzinikolaou et al. A comparison of grid-connected battery energy storage system designs
JP6522890B2 (ja) バッテリラックおよびその駆動方法
US10074995B2 (en) Battery management converter system
US11158888B2 (en) Management device and power storage system
JPWO2018216208A1 (ja) 電力変換装置
US11695293B2 (en) Power system
CA2944222A1 (fr) Systeme de stockage d'energie electrique
US11277013B2 (en) Power storage system having a plurality of power storage blocks interconnected in parallel and control device
KR101456097B1 (ko) 멀티모듈 컨버터의 암 스위치 특성평가 방법 및 장치
WO2012042401A2 (fr) Système d'équilibrage de charge
US9455580B2 (en) Battery management system and method
CN115776106A (zh) 直流配电和保护系统
CN113794373B (zh) 多电平直流转换器及供电系统
US12587102B2 (en) Power supply system with optimized availability
CN105305810A (zh) 一种改进的电荷泵电路系统
US20140217832A1 (en) Disconnect switches in dc power systems
JP2016029867A (ja) バッテリ管理システムおよび方法
CN112087134B (zh) 一种储能型直接耦合式直流变压器及控制方法
WO2023069082A1 (fr) Système d'alimentation
WO2017209686A1 (fr) Dispositif et procédé pour charger une source de tension
JP2016073121A (ja) スイッチング電源装置
Gleissner et al. Reliable & fault-tolerant DC/DC-converter structures
US12176822B2 (en) Condition monitoring of semiconductor devices in a converter
US20160006296A1 (en) Systems And Methods For Matching End Of Life For Multiple Batteries And/Or Battery Backup Units
WANJIRU FINAL YEAR PROJECT

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17807118

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 17807118

Country of ref document: EP

Kind code of ref document: A1