WO2025201645A1 - Système de stockage d'énergie, procédé d'isolation électrique d'au moins un système de module de stockage et procédé de transfert d'énergie - Google Patents

Système de stockage d'énergie, procédé d'isolation électrique d'au moins un système de module de stockage et procédé de transfert d'énergie

Info

Publication number
WO2025201645A1
WO2025201645A1 PCT/EP2024/058534 EP2024058534W WO2025201645A1 WO 2025201645 A1 WO2025201645 A1 WO 2025201645A1 EP 2024058534 W EP2024058534 W EP 2024058534W WO 2025201645 A1 WO2025201645 A1 WO 2025201645A1
Authority
WO
WIPO (PCT)
Prior art keywords
energy storage
switch
module
energy
storage module
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.)
Pending
Application number
PCT/EP2024/058534
Other languages
English (en)
Inventor
Ghanshyamsinh Vijaysinh GOHIL
Frans Dijkhuizen
Akif Zia KHAN
Roberto ALVES
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.)
Hitachi Energy Ltd
Original Assignee
Hitachi Energy Ltd
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 Hitachi Energy Ltd filed Critical Hitachi Energy Ltd
Priority to PCT/EP2024/058534 priority Critical patent/WO2025201645A1/fr
Publication of WO2025201645A1 publication Critical patent/WO2025201645A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H02J7/50—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially
    • H02J7/52—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially for charge balancing, e.g. equalisation of charge between batteries
    • H02J7/54—Passive balancing, e.g. using resistors or parallel MOSFETs
    • 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
    • H02J7/36—Arrangements using end-cell switching
    • 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
    • H02J7/60—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements
    • H02J7/62—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements against overcurrent
    • 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
    • H02J2207/00—Details of circuit arrangements for charging or discharging batteries or supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter

Definitions

  • Embodiments of the disclosure relate to an energy s torage system which has an improved functionality. Further embodiments relate to methods for operation of such an energy storage system. This is achieved by the subject-matter of the indep endent claims. Further embodiments are evident from the de pendent claimsand the following description.
  • An energy storage system is described. Exemplarily, the energy storage system is connected to an electrical power grid. In particular, the energy storage system is c onfigured to reduce energy imbalances of the electrical power grid. In particular, the energy storage system is configured to receive an electrical current from the electrical p ower grid P2024,0048 WO E /P230173WO01 March 28,2024 -2 - aswellasto provide an electricalcurrentto the electrical powergrid.
  • each of the energy storage modules com prises an energystorage block.
  • the energystorage block is, for example,an electricalenergyaccumulatorwhich is configured to store and release electric energy.
  • the energy st orage block is, for example, at least one of a battery mo dule and a supercapacitor.
  • the energy storage block comprises, for example, at least two terminals, a first terminal a nd a second terminal. In particular, the terminals diffe r from one another in their polarity. If the energy storage is a battery, the terminals comprise an anode terminal a nd a cathode terminal. If the energy storage is a superc apacitor, the terminals comprise a positive terminal and a ne gative terminal.
  • the energy storage block can further comprise elect rical storage cells being connected to one another.
  • the electrical storage cells are connected in memorize s and/or in parallelto one another.
  • directly neighbouring energy storage m odules are connected to one another with a connection, wherein the connection is formed exemplarily by a wire, a busba r and/or a connector.
  • each connection electrica lly connects the first terminal and the second terminal of directly neighbouring energy storage modules with o ne another.
  • the current breaking elements are exemplar ily arranged between directly neighbouring energy stora ge modules atthe respective connection.
  • each current breaking element is confi gured to disconnect directly neighbouring energy storage mod ules from one another.
  • the current breaking el ement is configured to transmit electrical current between d irectly neighbouring energy storage modules when the curren t breaking elementisin the closed state.
  • the current breaking element is configured to interrupt electri cal current between directly neighbouring energy storag e modules when the current breaking element is in an open sta te.
  • the state of the current breaking elem ent is dependent on an electrical current which is applied to the currentbreaking element.
  • the energy storage sys tem comprises a parallel line with switches being conne cted in series.
  • a number of energy storage mod ules equals a number of switches, such that one of the s witches and one of the current breaking elements are connec ted to one P2024,0048 WO E /P230173WO01 March 28,2024 -4 - respective energystorage module.
  • a numberof energy storage modules is larger than a number of s witches, such that at least two of the switches and/or at le ast two of the currentbreaking elementsare connected to one respective energystorage module.
  • directly neighbouring switches are con nected to one another with an interconnection.
  • e ach interconnection is electrically connected to a resp ective connection connecting directlyneighbouring energy storage modules.
  • the switches are exemplarily formed of a m echanical switch and/or an electrical switch or a combination thereof.
  • the switch is operated with an externa l control device.
  • the switch is configured to transmit electrical current when the switch is in the closed state.
  • the switch is configured to interrupt e lectrical currentwhen the switch isin an open state.
  • each energy storage module is connected to one of t he current breaking elements.
  • at least one energy storage module is connected to exactly one of the current b reaking elementsand/orto exactlyone ofthe switches.In particular, exactly one current breaking element an d/or exactly one switch is assigned to at exactly one en ergy storage module.
  • connection connect ing directly neighbouring energy storage modules compri ses exactlyone currentbreaking element.
  • at least two energy storage modules ar e connected to exactly one of the current breaking el ements P2024,0048 WO E /P230173WO01 March 28,2024 -5 - and/or to exactly one of the switches.
  • exactly one current breaking element and/or exactly one swi tch is assigned to at more than one neighboring energy sto rage modulesconnected in series.
  • each switch is connected in parallel with a respect ive energy storage module and a respective current breaking el ement.
  • exactly one switch is connected in par allel with exactly one respective energy storage module connec ted to exactlyone currentbreaking element.
  • the respective switch is configured to provide a curren t path through the respective energy storage module and th e respective current breaking element.
  • t he current breaking element is controlled dependent on a state of the switch.
  • the switch is, for example, configured to g enerate an artificial short circuit current when in the closed state. In particular, if the switch is in the closed state, t he energy storage module is shortened by the respective energ y storage module and the respective interconnection in partic ular by the artificialshortcircuitcurrent.
  • each switch is connected to one of the curr ent breaking elements by an impedance line.
  • the impedan ce line is,forexample,comprised bythe interconnection.
  • the interconnection and/or the impedan ce line is formed by a wire,a busbarand/ora connector.
  • at least some of the impedance lines a re each solely characteristic of an impedance of the connec tion and the interconnection.
  • at least some of the impedance lines comprise an inductor.
  • at least s ome of the impedance lines are each characteristic of the impe dance of the connection, the interconnection, and the induct or.
  • the power semiconductor switch comprises, for example, a Meta l-Oxide- Semiconductor Field-Effect Transistor, MOSFET, and/ or an Insulated Gate BipolarTransistor,IGBT.
  • MOSFET Metal Organic Field-Effect Transistor
  • IGBT Insulated Gate BipolarTransistor
  • at least some of the current breaking eleme nts comprise a fuse.
  • the fuse is configure d to open, e.g.being operated in the opened state,dependent on an overcurrent event.
  • the overcurrent event is in part icular characteristic of the accumulated value of the arti ficial short circuit current being higher than the thresho ld value.
  • the fuse automatically opens depende nt on the overcurrent event. “Automatically” means here and i n the following that the current breaking element is conf igured to open dependent on the current flowing through the c urrent breaking element. If the current breaking element is formed as a fuse , advantageously, solely the switch has to be operate d actively, e.g. by the external control device. This advantageously is comparatively communication resou rce- saving.
  • the energy stora ge system further comprises a further parallel line with furt her switchesbeing connected in series.
  • the further parallel line is connected in parallel to t he parallelline.
  • each further switch is connected in paralle l with a respective energy storage module and a respective c urrent breaking element.
  • directly neighbourin g further switches are connected to one another with a furthe r interconnection.
  • each further intercon nection is electricallyconnected bya furtherimpedance line to a respective connection connecting directly neighbour ing energy storage modules.
  • each furtherswitch isconnected to one of the current breaking elements by a further impedance li ne.
  • at least some of the further impedance line s comprise a furtherinductor.
  • every second impedance line comprises the i nductor, every second further impedance line comprises the f urther inductor, and the impedance line comprises the indu ctor if the further impedance line comprises no further ind uctor.
  • a resistor is arranged between two connecti ons of one energy storage module.
  • at least some a nd or all connections are connected to the resistor.
  • each resistor is arranged between two connections c onnected to the firstterminaland the second terminalofa respective single energystorage module.
  • a resistor module is connected to the switc h.
  • a resistor module is connected to at le ast some ofthe switchesorallofthe switches.
  • the resistor module comprises a resistor an d a bypass switch.
  • the resistormodule isconnected in series to the switch, and the bypass switch is arranged in parall el to the resistor.
  • the bypass switch is confi gured in this embodiment to bypass the resistor when the byp ass switch isin an opened state.
  • the resistor module is connected in paralle l to the switch, and the bypass switch is arranged in series to the resistor.
  • the bypass switch is confi gured in this embodiment to bypass the resistor when the byp ass switch isin a closed state.
  • the resistors are used to discharge the respective energy storage module to a voltage level which is safe to handle.
  • the energy stora ge system further comprises a further energy storage string c onnected in parallel to the energy storage string.
  • the furth er energy storage string is embodied as the energy storage st ring described herein before.
  • the energy s torage P2024,0048 WO E /P230173WO01 March 28,2024 -12 - system can comprise a plurality of further energy s torage stringsconnected in parallelto one another.
  • the switchesofthe energystorage string and the further energy storage string are used to suppr ess circulating currents among parallelly connected ene rgy storage strings by ensuring a voltage balancing amo ng the parallelenergystorage strings.
  • a further embodiment relates to a method for electr ically isolating atleastone energystorage module in an energy storage system, in particular an energy storage sys tem described herein above.Therefore,the featuresas described in connection with the method are also applicable f or the energystorage system and vice versa.
  • the switc h connected to the at least one energy storage module is closed, such that an artificial short current is ge nerated.
  • Dire ctly neighbouring switches 9 are connected to one anothe r with an P2024,0048 WO E /P230173WO01 March 28,2024 -16 - interconnection 10.
  • Each interconnection 10 is elec trically connected to a respective connection 7 connecting d irectly neighbouring energy storage modules 3 by an impedan ce line 11.
  • the impedance line 11 further com prises an inductor 12.
  • the inductor 12 is, for example, reali zed by a discrete inductor or by a magnetic core arranged ar ound the impedance line 11.
  • such an inductor 12 is a saturable inductor, offering a negligible impedance at comparativelyhigh currents.
  • An impedance of the closed path is in particular a com bination of an internal impedance of the energy storage modu le 3 and an externalimpedance,e.g.from the connection 7, the interconnection 10 and the impedance line 11 partic ularly comprising the inductor12.
  • the switch 9 remainsin the closed state to bypass a respective faulty energy storage module 3.
  • Advantag eously, a continued operation ofthe energystorage string 2 isthus achieved – with reduced capacity.
  • the artificial short circuit current is exemplarily solely dependent on a voltage of the energy storage module 3 and the impedance ofthe closed path.Advantageously,such an artificialshortcircuitcurrentvariesonlyin a comparatively small range.
  • the switch 9 i For transferring energy from the second energy stor age module 3, being particularly overcharged, to the first and third energy storage modules 3, initially, the switch 9 i s operated to be in the closed state for establishing a curren t path as indicated in Figure 3.
  • energy of the second energy storage module 3 is stored in the respective inductors 12.
  • the switch 9 corresponding to the fau lty second energy storage module 3 is closed for a time interv al.
  • the time interval is determined such that an accumulate d value of the artificial short current is smaller than a thre shold value, wherein the threshold value is, for example, characteristic of a breaking current limit of the c urrent breaking element6.
  • every second impedance line 11 comprises the induct or 12
  • every second further impedance line 19 comprises th e further inductor 20
  • the impedance line 11 comprises th e inductor 12 if the further impedance line 19 comprises no fu rther inductor20.
  • the energy storage system 1 of Figure 5 particularly ha s a parallel connection of bidirectional switches, i.e. being the switches9 and the furtherswitches17.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne un système de stockage d'énergie (1), comprenant-une chaîne de stockage d'énergie (2) avec des modules de stockage d'énergie (3) connectés en série par l'intermédiaire d'éléments de rupture de courant (6), et - une ligne parallèle avec des commutateurs (9) connectés en série, - chaque module de stockage d'énergie (3) étant connecté à un des éléments de coupure de courant (6), - chaque commutateur (9) étant connecté en parallèle à un module de stockage d'énergie respectif (3) et à un élément de rupture de courant respectif (6), le commutateur respectif (9) étant conçu pour fournir un trajet de courant à travers le module de stockage d'énergie respectif (3) et l'élément de rupture de courant respectif (6), et le commutateur respectif (9) étant conçu pour désassembler le module de stockage d'énergie respectif (3) de la chaîne de stockage d'énergie (2). De plus, l'invention concerne un procédé d'isolation électrique d'au moins un module de stockage d'énergie dans un système de stockage d'énergie et un procédé de transfert d'énergie d'au moins un module de stockage d'énergie à au moins un autre module de stockage d'énergie dans un système de stockage d'énergie.
PCT/EP2024/058534 2024-03-28 2024-03-28 Système de stockage d'énergie, procédé d'isolation électrique d'au moins un système de module de stockage et procédé de transfert d'énergie Pending WO2025201645A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2024/058534 WO2025201645A1 (fr) 2024-03-28 2024-03-28 Système de stockage d'énergie, procédé d'isolation électrique d'au moins un système de module de stockage et procédé de transfert d'énergie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2024/058534 WO2025201645A1 (fr) 2024-03-28 2024-03-28 Système de stockage d'énergie, procédé d'isolation électrique d'au moins un système de module de stockage et procédé de transfert d'énergie

Publications (1)

Publication Number Publication Date
WO2025201645A1 true WO2025201645A1 (fr) 2025-10-02

Family

ID=90718795

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/058534 Pending WO2025201645A1 (fr) 2024-03-28 2024-03-28 Système de stockage d'énergie, procédé d'isolation électrique d'au moins un système de module de stockage et procédé de transfert d'énergie

Country Status (1)

Country Link
WO (1) WO2025201645A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100253286A1 (en) * 2009-04-03 2010-10-07 Pantas Sutardja Power management circuit for rechargeable battery stack
US20130342156A1 (en) * 2011-03-11 2013-12-26 Evtd Inc. Balance correcting apparatus, electricity storage system, and transportation device
US20140009116A1 (en) * 2011-03-08 2014-01-09 Evtd Inc. Balance correction apparatus and electric storage system
US20140015475A1 (en) * 2011-03-31 2014-01-16 Evtd Inc. Balance correcting apparatus and electricity storage system
US9178367B2 (en) * 2012-03-19 2015-11-03 Evtd Inc. Balance correction apparatus and electric storage system
EP3872944A1 (fr) * 2018-10-22 2021-09-01 Nr Electric Co., Ltd. Dispositif de dissipation d'énergie à courant continu et son procédé de commande
EP4270706A1 (fr) * 2022-04-26 2023-11-01 General Electric Technology GmbH Système de stockage d'énergie cc

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100253286A1 (en) * 2009-04-03 2010-10-07 Pantas Sutardja Power management circuit for rechargeable battery stack
US20140009116A1 (en) * 2011-03-08 2014-01-09 Evtd Inc. Balance correction apparatus and electric storage system
US20130342156A1 (en) * 2011-03-11 2013-12-26 Evtd Inc. Balance correcting apparatus, electricity storage system, and transportation device
US20140015475A1 (en) * 2011-03-31 2014-01-16 Evtd Inc. Balance correcting apparatus and electricity storage system
US9178367B2 (en) * 2012-03-19 2015-11-03 Evtd Inc. Balance correction apparatus and electric storage system
EP3872944A1 (fr) * 2018-10-22 2021-09-01 Nr Electric Co., Ltd. Dispositif de dissipation d'énergie à courant continu et son procédé de commande
EP4270706A1 (fr) * 2022-04-26 2023-11-01 General Electric Technology GmbH Système de stockage d'énergie cc

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