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WO2018192190A1 - Procédé et système d'accumulation d'énergie en chaîne, centrale d'accumulation d'énergie et système d'accumulation d'énergie - Google Patents

Procédé et système d'accumulation d'énergie en chaîne, centrale d'accumulation d'énergie et système d'accumulation d'énergie Download PDF

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Publication number
WO2018192190A1
WO2018192190A1 PCT/CN2017/104971 CN2017104971W WO2018192190A1 WO 2018192190 A1 WO2018192190 A1 WO 2018192190A1 CN 2017104971 W CN2017104971 W CN 2017104971W WO 2018192190 A1 WO2018192190 A1 WO 2018192190A1
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WIPO (PCT)
Prior art keywords
battery
energy storage
data
chain
ladder
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Ceased
Application number
PCT/CN2017/104971
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English (en)
Chinese (zh)
Inventor
邹积勇
沈斐
张建兴
邓小嘉
杨勇
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NIO Co Ltd
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NIO Co Ltd
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Publication date
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Publication of WO2018192190A1 publication Critical patent/WO2018192190A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits

Definitions

  • the invention relates to the field of energy storage technology, in particular to a chain energy storage method, a system, an energy storage power station and an energy storage system.
  • the eliminated batteries can usually be used in energy storage power stations.
  • the conventional method will disassemble the batteries and classify and evaluate the performance of the batteries according to the test results, and then reorganize the battery modules according to the energy storage requirements.
  • this disassembly test and evaluation process is very difficult.
  • a chain energy storage method is provided.
  • a chain energy storage system and an energy storage power station and an energy storage system are also provided.
  • a chain energy storage method comprising:
  • the use of the battery by the ladder is reused according to a preset planning strategy of the energy storage power station.
  • the battery state data and the battery history data comprise: battery charging power data and historical data recorded in the power station, battery charging power data and historical data on the device to be charged, and the device to be charged.
  • the method further comprises:
  • the batteries are classified according to the value of the ladder use.
  • the method further includes:
  • the classifying the battery according to the value of the ladder use includes:
  • the battery is classified according to the characteristic data.
  • the acquiring the battery cell state data and the cell history data comprises: acquiring the battery cell state data and the cell history data by using a CAN communication protocol.
  • the reusing the battery comprises:
  • the chain energy storage device is constructed by using the chain links.
  • a chain energy storage system comprising:
  • selecting a module configured to select a battery for the ladder according to the battery state data and the historical data of the battery; and reuse a module for reusing the battery using the ladder according to a preset planning strategy of the energy storage power station .
  • the battery state data and the battery history data comprise: battery charging power data and historical data recorded in the power station, battery charging power data and historical data on the device to be charged, and the device to be charged.
  • the system further comprises:
  • a classification module for classifying the batteries according to the value of the ladder use.
  • the obtaining module is further configured to acquire an identifier of the battery
  • the classification module includes:
  • a first obtaining submodule configured to acquire lifecycle data of the battery by using the identifier
  • a second obtaining submodule configured to obtain characteristic data of the battery according to the life cycle data
  • a classification sub-module for classifying the battery according to the characteristic data.
  • the obtaining module comprises:
  • a third obtaining submodule configured to acquire the battery cell state data and the cell history data by using a CAN communication protocol.
  • the reuse module comprises:
  • a packaging module for packaging the battery to obtain a link
  • An energy storage power station comprising any of the above chain energy storage systems.
  • An energy storage system comprising a power grid and the energy storage power station; wherein the power grid is connected to the energy storage power station; wherein the chain energy storage system is used for processing a battery, obtaining a battery for the ladder, and The ladder uses a battery for an energy storage power station.
  • the above grid is a medium voltage grid.
  • the energy storage power station includes a link, the link includes an AC/DC bidirectional inverter; and the AC/DC bidirectional inverter is connected to the ladder using a battery.
  • the chain energy storage system comprises a three-phase line, each of the three-phase lines comprises a plurality of links in series; each phase line is connected in parallel with the grid by a reactor, or is isolated A transformer is coupled in series with the grid; wherein phase voltages of the respective phase lines are matched to voltages of the grid.
  • the three-phase line is a star structure or a triangular structure.
  • Embodiments of the present invention provide a chain energy storage method and system, and an energy storage power station and an energy storage system.
  • the method includes acquiring battery cell state data and battery historical data; selecting a battery for the ladder according to the battery state data and the battery historical data; and reusing the battery by the step according to a preset planning strategy of the energy storage power station.
  • the eliminated batteries are detected, the batteries are screened out, and then the batteries are classified, and then the batteries are reused according to the preset planning strategy of the energy storage station and the results of the battery classification.
  • FIG. 1 is a schematic flow chart of a chain energy storage method according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a link according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural view of another link according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural view of still another link according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a chain energy storage device with a triangular topology constructed by a link according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a chain energy storage device with a star topology constructed by a link link applied to a power grid according to an embodiment of the present invention
  • FIG. 7 is a schematic structural view of a chain energy storage system according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a chain energy storage system according to another embodiment of the present invention.
  • FIG. 9 is a schematic structural view of an energy storage power plant according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural view of an energy storage system according to an embodiment of the present invention.
  • the conventional method will disassemble the battery and classify and evaluate the performance of the battery according to the test results, and then reorganize the battery module according to the energy storage requirements.
  • This disassembly test and evaluation process Very difficult. To this end, it is necessary to solve the technical problem of how to eliminate the use of the battery disassembly test process and accurately evaluate the commercial value of the battery.
  • an embodiment of the present invention provides a chain energy storage method. As shown in Figure 1, the method includes:
  • the battery state data and the battery historical data specifically include: battery charging power data and historical data recorded in the power station, battery charging power data and historical data on the device to be charged, and the battery on the device to be charged are charged in the charging pile.
  • the embodiment of the present invention can more accurately evaluate the battery life of the battery by considering the historical data of the battery core.
  • the above method can acquire battery cell state data and cell history data through a CAN communication protocol.
  • each battery or battery pack (PACK)
  • PACK battery pack
  • the cloud can be an OSS (Operational Support System) server or a server cluster, but is not limited to this.
  • the charging power data ie, the data on the charging power curve
  • the historical data of the battery are recorded in real time, and the charging power data and the historical data are uploaded to the cloud for storage, and then the subsequent analysis.
  • the charging power data and historical data of the battery in the charging state of the charging post are recorded in real time, and the charging power data and historical data are uploaded to the cloud. Perform storage for subsequent analysis. If the device to be charged is moving (for example: the electric car is driving In the process, the discharge power data and historical data of the battery are recorded in real time, and the discharge power data and historical data are uploaded to the cloud for storage, and then the subsequent analysis is performed.
  • a device to be charged such as an electric car, an electric bicycle, etc.
  • S110 Select a battery using the ladder according to the battery state data and the battery historical data.
  • the battery is lowered to a predetermined level in SOH (the percentage of the full charge capacity of the battery relative to the rated capacity), it is defined as a step-by-step battery.
  • the battery is characterized as a ladder.
  • the method further includes: classifying the battery according to the value of the ladder.
  • the battery can be classified by the identification code of the battery, and the foregoing classifying the battery according to the use value of the ladder may include:
  • S111 Obtain a life cycle data of the battery by using an identification code.
  • the battery life cycle data is all data from the time the battery is put into use to the end of life.
  • the life cycle data of the battery can be all data from the time the electric vehicle is put into use to the battery during the retirement of the electric vehicle.
  • S112 Obtain characteristic data of the battery according to the life cycle data.
  • the battery characteristic data may be data on how long the battery can be used, battery health data, data for value evaluation, and the like.
  • S113 classify the battery according to the characteristic data.
  • S120 Reusing the battery by the ladder according to the preset planning strategy of the energy storage power station.
  • step S120 may include encapsulating the battery to obtain a link; and using the link to construct a chain energy storage device. More preferably, the link system obtained by the embodiment of the present invention can also be used to combine the control system and the reactance device to obtain the required chain energy storage device.
  • the embodiment of the present invention considers the battery cell state data and the battery core historical data, and determines whether the battery uses the battery for the ladder, and when the battery uses the battery for the ladder, according to the value of the ladder, the battery is used. Classification, and reuse of batteries according to the preset planning strategy of the energy storage power station. This eliminates the disassembly and reorganization of the battery. This has largely saved the upfront investment in battery ladder utilization. Moreover, the technical solution of the present application considers the historical data of the battery cells, so that the ladder life of the battery can be accurately evaluated, thereby evaluating the value of the battery.
  • the topology of the chain energy storage device constructed by implementing the chain energy storage method provided by the embodiment of the present invention may be: a star type or a triangle type structure inside the chain energy storage device.
  • each phase line includes n links (ie, energy storage units), and the n links are connected in series on the AC output side of the grid.
  • the series reactors are directly connected to the grid.
  • Each link includes a battery and a DC/.../AC conversion module, as shown in Figure 2.
  • n links can be connected in series.
  • the chain energy storage equipment can be connected in parallel to the grid through reactors, or can be connected in series to the grid through an isolating transformer.
  • the above link may have other structures.
  • the link includes a battery and an H-bridge inverter module.
  • the battery provides DC+ and DC-voltage to provide DC input to the H-bridge inverter module, and after the inverter, the output pulse AC AC1, AC2; T1, T2, T3 and T4 in the H-bridge inverter module are IGBT modules.
  • the link may also adopt a structure as shown in FIG. 4, and the link includes an H-bridge converter, a DC/DC module, and a battery.
  • T1, T2, T3 and T4 in the H-bridge inverter module are respectively IGBT modules.
  • the battery provides DCB+, DCB- as input to DC/DC, and then DC/DC converts DCB+, DCB- into DC+, DC- to provide input to the H-bridge inverter module.
  • T1, T2, T3, and T4 invert the DC power on the DC+ and DC- sides into pulsed AC, and output them from AC1 and AC2, respectively.
  • FIG. 5 exemplarily shows a schematic diagram of a chain type energy storage device of a triangular topology constructed by the method provided by the embodiment of the present invention applied to a power grid.
  • the number of links (A1, A2, ... An-1, An, B1, B2, ... Bn-1, Bn, C1, C2, ... Cn-1, Cn) is 3n, and the number of energy storage units is 3n.
  • Each link can be constructed as shown in Figures 2, 3, and 4. Taking the structure shown in FIG. 4 as an example, each link includes an energy storage unit, a DC/DC unit, and an H-bridge converter.
  • the H-bridge converter acts as an inverter unit.
  • the energy storage unit includes a battery, a DC/DC bidirectional inverter directly connected to the battery, and a DC/AC inverter module connected to the DC/DC bidirectional inverter. 3n energy storage units are connected in series on the AC output side, and after matching the grid voltage, the series reactor L is directly connected to the grid.
  • FIG. 6 exemplarily shows a schematic diagram of a chain energy storage device with a star topology constructed by the method provided by the embodiment of the present invention applied to a power grid. Each of the links may adopt the structure as shown in FIG. 2, FIG. 3 and FIG. 4, and details are not described herein again.
  • S200 Embed state data and historical data of the battery cell and the identification code into the CAN communication protocol, and upload to the OSS (Operation Support System) server.
  • OSS Operaation Support System
  • S201 Determine whether the battery uses the battery according to the battery state data and the battery historical data. If yes, execute S202; otherwise, execute S203.
  • S202 Obtain a life cycle data of the battery by using an identification code.
  • S205 Classify the battery according to the characteristic data and according to the value of the ladder utilization.
  • this step selects the battery that meets the requirements for direct packaging and obtains the link.
  • this step can combine chain links, control systems, reactances and other equipment to obtain the required chain energy storage equipment.
  • the battery can be directly used for the medium voltage grid by the embodiment of the present invention.
  • the life of the battery can be accurately evaluated, thereby evaluating the commercial value of the energy storage system; the disassembly and reorganization of the battery can be omitted, and the upfront investment of the battery ladder utilization is largely saved.
  • the embodiment of the invention also provides a chain energy storage system.
  • the chain energy storage system can perform the above chain energy storage method.
  • FIG. 7 is a schematic structural diagram of an embodiment.
  • the chain energy storage system 70 of the present embodiment includes an acquisition module 72, a selection module 74, and a reuse module 76.
  • the obtaining module 72 is configured to acquire battery cell state data and cell history data.
  • the selection module 74 is configured to select a battery using the ladder according to the battery state data and the battery historical data.
  • the reuse module 76 is configured to reuse the battery of the ladder according to the preset planning strategy of the energy storage power station.
  • the battery state data and the battery historical data include: battery charging power data and historical data recorded in the power station, battery charging power data and historical data on the device to be charged, and the battery on the device to be charged are in the charging state of the charging pile.
  • the charging power data and historical data under and the discharge power data and historical data of the battery during the movement of the device to be charged.
  • the chain energy storage system may further include a classification module.
  • the classification module is used to classify the battery according to the value of the ladder.
  • the obtaining module 72 in the above embodiment is further configured to acquire an identification code of the battery.
  • the foregoing classification module may specifically include a first acquisition submodule, a second acquisition submodule, and a classification submodule.
  • the first obtaining submodule is configured to obtain life cycle data of the battery by using the identification code.
  • the second acquisition sub-module is configured to obtain characteristic data of the battery according to the life cycle data.
  • the classification sub-module is used to classify the battery based on the characteristic data.
  • the obtaining module 72 may further include a third acquiring submodule.
  • the third acquisition submodule is configured to acquire battery cell state data and cell history data through a CAN communication protocol.
  • the foregoing reuse module 76 may specifically include a package module and a build module.
  • the package module is used to package the battery to obtain a link.
  • the building module is used to build chain energy storage equipment by using chain links.
  • the chain energy storage system will be described in detail below with reference to FIG. 8 in a preferred embodiment.
  • a chain type energy storage device with a star topology is taken as an example, and a three-phase line is connected in parallel to the power grid through the reactor L, and a plurality of links in each phase line are connected in series.
  • Each link can adopt the structure shown in Figures 2, 3, and 4.
  • the link is connected to the acquisition module 82 via the CAN bus.
  • the acquisition module 82 obtains battery state data and battery history data of the battery in the link.
  • Acquisition module 82 then transmits the data to selection module 84.
  • the selection module 84 selects the battery using the ladder according to the battery state data and the battery historical data.
  • the reuse module 86 reuses the battery of the ladder according to a preset planning strategy of the energy storage power station.
  • the battery is selected by the ladder, and the preset utilization strategy of the energy storage power station is used to reuse the battery.
  • the elimination of the battery disassembly, testing and reorganization work saves the upfront investment of the battery ladder utilization, and can more accurately evaluate the ladder life and commercial value of the battery PACK.
  • an energy storage power station embodiment is also provided. As shown in FIG. 9, the energy storage power station 90 of this embodiment includes a chain energy storage system 91, and the chain energy storage system 91 can be any of the above chain energy storage systems.
  • the description of the energy storage power station can be referred to the relevant description in the embodiment of the chain energy storage method, and details are not described herein again.
  • the present invention also provides an embodiment of an energy storage system.
  • the energy storage system 100 of this embodiment includes a power grid 101 and an energy storage power station 102; wherein the energy storage power station 102 includes a chain energy storage system 103 and is connected to the power grid 101; wherein, the chain energy storage system 103 is used for processing the battery, obtaining a battery for the ladder, and applying the battery to the energy storage station 103.
  • the power grid is preferably a medium voltage grid.
  • the chain energy storage system comprises a three-phase line, each of the three-phase lines comprises a plurality of series connected links; each phase line is connected in parallel with the medium-voltage network through a reactor, or through an isolating transformer and a medium-voltage piezoelectric The net phase is connected in series; wherein the phase voltage of each phase line matches the voltage of the medium voltage grid.
  • the three-phase line can be set to a star structure or a triangular structure.
  • Those skilled in the art can set according to the actual situation on site, and can also set each phase line to be composed of N links according to the voltage level. Where N takes a positive integer.
  • the energy storage power station includes a link, and the link includes an AC/DC bidirectional inverter; the AC/DC bidirectional inverter is connected to the ladder by a battery.
  • the ladder battery is directly disconnected from the AC/DC bidirectional inverter without being disassembled, and constitutes an energy storage unit, that is, a link.
  • the energy storage unit is connected in series on the AC output side, and is connected to the grid (especially the medium voltage grid) after matching the grid voltage.
  • the phase lines can be connected in parallel with the medium-voltage grid through the reactor or in series with the medium-voltage grid through the isolation transformer.

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

Abstract

L'invention concerne un procédé et un système d'accumulation d'énergie en chaîne, une centrale d'accumulation d'énergie et un système d'accumulation d'énergie. Le procédé consiste : à acquérir des données d'état d'élément de batterie et des données d'élément passées (S100) ; à sélectionner des batteries d'utilisation en cascade selon les données d'état d'élément de batterie et les données d'élément passées (S110) ; et à réutiliser les batteries d'utilisation en cascade conformément à une stratégie de planification prédéfinie par une centrale d'accumulation d'énergie (S120). Après sélection des batteries d'utilisation en cascade, une étape de classification des batteries selon une valeur d'utilisation en cascade peut également être comprise. Au moyen de la solution technique, l'opération de démantèlement et de restructuration de batteries est supprimée, et l'investissement initial d'une utilisation en cascade de batteries est réduit dans une grande mesure. De plus, dans la présente solution technique, les données passées d'éléments de batterie sont prises en considération, et la durée de vie d'utilisation en cascade de batteries peut ainsi être estimée précisément dans le but d'estimer la valeur de ces dernières.
PCT/CN2017/104971 2017-04-19 2017-09-30 Procédé et système d'accumulation d'énergie en chaîne, centrale d'accumulation d'énergie et système d'accumulation d'énergie Ceased WO2018192190A1 (fr)

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CN201710258482.4A CN106936219A (zh) 2017-04-19 2017-04-19 链式储能方法、系统和储能电站以及储能系统
CN201710258482.4 2017-04-19

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US12147436B2 (en) 2020-03-27 2024-11-19 Honda Motor Co., Ltd. Battery information processing system and battery information processing method to identify batteries in accordance with a specification
CN119965931A (zh) * 2025-01-15 2025-05-09 浙江吉利控股集团有限公司 一种用于换电站的s2g充放电系统

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CN109604186B (zh) * 2018-12-14 2021-12-07 蓝谷智慧(北京)能源科技有限公司 动力电池性能柔性评估分选方法
CN113030748A (zh) * 2021-03-03 2021-06-25 国轩高科美国研究院 一种电池数据管理方法及装置
CN113725507A (zh) * 2021-09-29 2021-11-30 阳光电源股份有限公司 一种换电电池处理系统及方法
CN119627987A (zh) 2023-09-13 2025-03-14 台达电子工业股份有限公司 储能系统及其控制方法

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CN119965931A (zh) * 2025-01-15 2025-05-09 浙江吉利控股集团有限公司 一种用于换电站的s2g充放电系统

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