WO2018074502A1 - Système de batterie - Google Patents

Système de batterie Download PDF

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Publication number
WO2018074502A1
WO2018074502A1 PCT/JP2017/037638 JP2017037638W WO2018074502A1 WO 2018074502 A1 WO2018074502 A1 WO 2018074502A1 JP 2017037638 W JP2017037638 W JP 2017037638W WO 2018074502 A1 WO2018074502 A1 WO 2018074502A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
type battery
output
current
temperature
Prior art date
Application number
PCT/JP2017/037638
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English (en)
Japanese (ja)
Inventor
晋 山内
茂樹 牧野
大輝 小松
Original Assignee
株式会社日立製作所
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 株式会社日立製作所 filed Critical 株式会社日立製作所
Priority to JP2018546374A priority Critical patent/JP6752286B2/ja
Publication of WO2018074502A1 publication Critical patent/WO2018074502A1/fr

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Classifications

    • 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
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • 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 to a battery system.
  • a storage battery mounted on an electric vehicle equipped with an electric drive system such as a hybrid vehicle is an important component that affects the mileage and fuel consumption of the electric vehicle and the electric cost of the electric vehicle (hereinafter referred to as EV). .
  • the storage battery deteriorates due to the operating status of the electric vehicle and changes over time, and the performance decreases.
  • the storage battery keeps track of the deterioration state during operation of the electric vehicle and charges and discharges so that the deterioration state does not seriously affect the mileage and fuel consumption. Need to control.
  • Patent Document 1 discloses a system in which a capacity type battery and an output type battery are connected in parallel to each other.
  • the current distribution between the capacity type battery and the output type battery is determined according to the thermal margin of both batteries, and attempts are made to suppress degradation of either battery.
  • SOC state of charge
  • the capacity type battery has a problem that the thermal resistance is larger than that of the output type battery, and once the temperature becomes high, the temperature cannot be easily lowered. Therefore, when the degradation of the battery system is suppressed using the method of Patent Document 1, current is distributed to both the capacity type battery and the output type battery even when a short time output is required. There is a possibility of burdening the battery with a large current. Therefore, there is a possibility that the temperature of the capacity type battery instantaneously increases, and thereafter the temperature of the capacity type battery does not decrease and the deterioration is promoted.
  • the battery system according to the present invention is characterized in that the output type battery and the capacity type battery are connected in parallel, and the current of the capacity type battery is controlled based on the temperature of the output type battery.
  • a battery system when a high output is required, a battery system is provided in which current distribution to a capacity type battery that is less likely to drop in temperature is within a certain range and deterioration of the capacity type battery is suppressed. be able to.
  • the figure which shows an example of the system in connection with this invention The figure which shows an example of a structure of a battery control part.
  • FIG. 1 shows an example of the configuration of a battery system to which the present invention is applied. Since the output voltage of the battery system 100 is a DC voltage that varies depending on the remaining capacity of the battery, the output current, and the like, it may not be suitable for supplying power directly to the load 111. Therefore, in this example, the inverter 110 controlled by the host controller 112 converts the output voltage of the battery system 100 into a three-phase alternating current and supplies it to the load 111. The same configuration is used when a DC voltage, other multiphase AC, or single phase AC is supplied to the load.
  • the electric power output from the load 111 can be stored in the battery system 100 by using the inverter 110 as a bidirectional inverter. Further, by connecting the charging system to the battery system 100 in parallel with the inverter 110, the battery system 100 can be charged as necessary.
  • the battery system 100 provides information related to the battery state such as SOC and SOH useful for controlling the inverter 110 and the load 111, the maximum charge current / discharge current (allowable current) that can be passed, the battery temperature, and the presence / absence of battery abnormality. Send to.
  • the host controller 112 performs energy management, abnormality detection, and the like based on this information. When the host controller 112 determines that the battery system 100 should be disconnected from the inverter 110 or the load 111, the host controller 112 transmits a disconnection instruction to the battery system 100.
  • the battery system 100 flows to one or more battery modules 105 including a plurality of batteries, a battery controller 103 that monitors, estimates, and controls the state of the battery system 100, a relay 106 that intermittently outputs the battery system 100, and the battery. From a current sensor 108 that measures current, a voltage sensor 202 that measures battery voltage, a leakage sensor 203 that measures insulation resistance between the battery system 100 and, for example, ground, and a circuit breaker 107 that is provided according to the output voltage of the battery system Composed.
  • the battery module 105 includes a temperature sensor and a plurality of unit batteries, measures the temperature inside the module and the voltage of each battery, and performs charging / discharging in units of single cells as necessary. As a result, voltage monitoring and voltage adjustment can be performed in units of single cells, and temperature information necessary for estimating the state of the battery whose characteristics change according to temperature can be measured.
  • a current sensor 108 and a relay 106 are connected to the battery module 105 in series with the battery module 105.
  • the current value necessary for monitoring and estimating the state of the battery module 105 can be measured, and the output of the battery system 100 can be interrupted based on a command from the host controller.
  • a circuit breaker 107 may be added to shut off power input / output to the battery system 100 manually. By forcibly shutting off using the circuit breaker 107, it is possible to prevent an electric shock accident or a short-circuit accident when assembling or disassembling the battery system 100 or when dealing with an accident of a device equipped with the battery system 100. .
  • a relay 106, a circuit breaker 107, and a current sensor 108 may be provided in each row, or the relay 106 and the circuit breaker 107 are provided only at the output portion of the battery system 100.
  • a current sensor 108 may be provided.
  • the relay 106, the circuit breaker 107, and the current sensor 108 may be provided in both of each column and the output unit of the battery system 100.
  • the relay 106 may be configured by one relay, or may be configured by a set of a main relay, a precharge relay, and a resistor. In the latter configuration, a resistor is arranged in series with the precharge relay, and these are connected in parallel with the main relay.
  • a precharge relay When connecting the relay 106, first a precharge relay is connected. Since the current flowing through the precharge relay is limited by the resistance connected in series, the inrush current that can occur in the former configuration can be limited. Then, after the current flowing through the precharge relay becomes sufficiently small, the main relay is connected.
  • the timing of main relay connection may be based on the current flowing through the precharge relay, or may be based on the voltage applied to the resistor or the voltage across the terminals of the main relay, or the time elapsed since the precharge relay was connected. May be used as a reference.
  • the voltage sensor 202 is connected in parallel to one or a plurality of battery modules 105 or one series of the battery modules 105, and measures a voltage value necessary for monitoring and estimating the state of the battery module 105.
  • a leakage sensor 203 is connected to the battery module 105 to detect a state where a leakage can occur before the leakage occurs, that is, a state where the insulation resistance is reduced, thereby preventing an accident from occurring.
  • the values measured by the battery module 105, the current sensor 108, the voltage sensor 202, and the leakage sensor 203 are transmitted to the battery controller 103, and the battery controller 103 performs battery state monitoring, estimation, and control based on the values.
  • the control refers to charging / discharging for each unit battery for equalizing the voltage of each unit battery, power control of each sensor, addressing of the sensor, control of the relay 106 connected to the battery controller 103, and the like.
  • the CPU 201 performs calculations necessary for battery state monitoring, estimation, and control.
  • the battery system 100 may include a system cooling fan, and the battery controller 103 may control the fan. As described above, the battery system 100 performs the cooling until the amount of communication with the host controller can be reduced.
  • the battery controller 103 may incorporate a voltage sensor 202 or a leakage sensor 203. By doing in this way, the number of harnesses can be reduced as compared with the case where individual sensors are prepared, and the labor for sensor installation can also be reduced. However, since the scale (maximum output voltage, current, etc.) of the battery system 100 that can be handled by the battery controller 103 is limited by incorporating the sensor, the voltage sensor 202 and the leakage sensor 203 are intentionally separated from the battery controller 103. You may give a degree of freedom.
  • FIG. 2 shows a configuration diagram of the battery control unit 201 according to the present invention.
  • the battery control unit 201 indicates the CPU shown in FIG.
  • the battery control unit 201 has a current control unit 204.
  • the current control unit 204 calculates parameters related to the control, but in the present invention, since it does not touch that point, it is omitted from the configuration diagram of FIG.
  • the current control unit 204 acquires battery information (current information, voltage information, etc.) and temperature information of the output type battery 105a from the output type battery 105a.
  • the current control unit 204 calculates a current value to be output from the capacity type battery 105b based on the temperature information of the output type battery 105a. Specific control in the current control unit 204 will be described later.
  • FIG. 3 shows specific output waveforms of the output type battery 105a and the capacity type battery 105b.
  • the solid line represents the output from the output type battery 105a
  • the dotted line represents the output from the capacity type battery. This movement will be briefly described.
  • the start time of the vehicle is assumed to be time t0. Since the vehicle started at time t0 uses the output for acceleration, the output (discharge current) of both the output type battery 105a and the capacity type battery 105b rises. When the acceleration ends and time t1 is reached at which no large output is required, the discharge current from the output type battery 105a disappears, and only the output from the capacity type battery 105b. At this time, since the output type battery 105a is stopped, heat is not generated, and the cooling of the output type battery 105a proceeds.
  • a charging current flows through the capacity type battery 105b.
  • the charging current flows to the output type battery 105a, so that no extra addition is applied to the capacity type battery 105b.
  • the charging of the output type battery 105a stops and only the capacity type battery 105b is charged. Accordingly, from time t4 to time t5, the output type battery 105a does not generate heat, and the output type battery 105a is further cooled.
  • the output type battery 105a has a feature that its thermal capacity is small but its thermal resistance is small. Therefore, even if a high output is output in a short time, the temperature rise of the battery is small due to the small thermal resistance. Therefore, even if the output type battery 105a outputs a large current in a short time, the battery temperature does not increase so much, so it is quickly cooled and returned to the original temperature, and the temperature decreases even after a short rest as shown in FIG. .
  • the capacity-type battery 105b is characterized by a large heat capacity and a large thermal resistance. Therefore, there is a problem that once the temperature becomes high, it takes time to cool down.
  • the output type battery 105a corresponds to the required output from the viewpoint of suppressing deterioration of the battery. The reason is that, as described above, the output type battery 105a is easier to lower the temperature.
  • the battery control unit 201 determines current command values of the output type battery 105a and the capacity type battery 105b from the battery information and temperature information of the output type battery 105a and the battery information and temperature information of the capacity type battery 105b.
  • a one-dot chain line shown in FIG. 4 is a current command value of the output type battery 105 a output from the battery control unit 201.
  • FIG. 4 is an example in which the current command value is the same value as the upper limit current value.
  • the current control unit 204 outputs a current command value that limits the current of the output type battery 105a.
  • FIG. 5 is a diagram showing that the current generated by the battery system 100 is the sum of the output current of the output type battery 105a and the capacity type battery 105b.
  • the output current of the output type battery 105a is limited as shown in FIG. 4, if the output current of the capacity type battery 105b is not changed, the current value output from the battery system 100 becomes small after the temperature T1.
  • the battery control unit 201 outputs a current command value for increasing the output from the capacity type battery 105b so as to compensate for the shaded portion after the temperature T1 shown in FIG.
  • the capacity type battery 105b is controlled to increase the output current and satisfy the current value required for the output type battery 105a. That is, the current of the capacity type battery 105b is controlled based on the temperature information of the output type battery 105a. More specifically, the battery control unit 201 performs control to increase the current value of the capacity type battery 105b when the temperature of the output type battery 105a becomes equal to or higher than a predetermined value.
  • FIG. 6 is a diagram showing a control flow of the present invention.
  • step S600 the control of the present invention starts.
  • step S601 it is determined whether the currently requested power can be covered only by the capacity type battery 105b. When it can cover only with the capacity type battery 105b, it progresses to step S607, and also returns to step S601.
  • step S601 if the requested output cannot be covered only by the capacity type battery 105b in step S601, the process proceeds to step S602, and the output type battery 105a bears the shortage output.
  • step S603 it is determined whether or not the output type battery 105a is equal to or higher than a predetermined temperature T1. If it is determined that the temperature of the output type battery 105a is equal to or higher than T1, the process proceeds to step S604, where the output (charge / discharge current) of the output type battery 105a is limited, and the capacity type battery with respect to power that cannot be covered by the output type battery 105a Compensate with 105b. Then, in step S605, it is determined again whether the required power can be covered only by the capacity type battery 105b.
  • step S606 When the required power can be provided only by the capacity type battery 105b, the process proceeds to step S606, and charging / discharging of the output type battery 105a is stopped to reduce the temperature of the output type battery 105a as much as possible. Then, the process proceeds to step S607 and returns to step S601. On the other hand, if the requested output cannot be covered only by the capacity type battery 105b in step S605, the process returns to step S604.
  • step S603 If the temperature of the output type battery 105a is lower than T1 in step S603, the process proceeds to step S607 and returns to step S601.
  • FIG. 7 is a comparison of the battery deterioration state of the battery system 100 using the present invention and the conventional battery system.
  • the solid line shows the deterioration state of the battery system 100 when the present invention is used, and the dotted line shows the deterioration state of the conventional battery system.
  • the battery system 100 using the present invention is less deteriorated than the conventional battery system 100.
  • the power required for the output type battery 105a is reduced when the temperature of the output type battery 105a reaches T1.
  • the capacity of the output type battery 105b is increased, that is, according to the temperature of the output type battery 105a.
  • weighting the output of the battery 105b is also a method of weighting the output of the battery 105b.
  • the battery system 100 connects the output type battery 105a and the capacity type battery 105b in parallel, and the current of the capacity type battery 105b is controlled based on the temperature of the output type battery 105a.
  • the battery system 100 includes a current control unit 104 that controls input / output currents of the output type battery 105a and the capacity type battery 105b. With such a configuration, it is possible to prevent both the output type battery 105a and the capacity type battery 105b from reaching a predetermined temperature or higher.
  • the current control unit 104 controls the current so that the input / output current amount of the capacity type battery 105b increases when the temperature of the output type battery 105a becomes higher than a predetermined temperature.
  • the input / output current of the capacity type battery 105b increases as the temperature increases after the current control unit 104 exceeds the predetermined temperature set in advance. Control the current to By adopting such a configuration, it is possible to further reduce the load applied to the output type battery 105a. Therefore, it is possible to suppress the temperature rise of the output type battery 105a and further suppress deterioration.
  • the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. It can be changed.
  • the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described.
  • a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment.
  • 105a output type battery
  • 105b capacity type battery
  • 110 inverter
  • 201 battery control unit (CPU)
  • 204 current control unit.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne un système de batterie 100 dans lequel une batterie de type sortie 105a et une batterie de type capacité 105b sont connectées en parallèle, et le courant de la batterie de type capacité 105b est commandé sur la base de la température de la batterie de type sortie 105a. Par conséquent, il est possible de fournir un système de batterie qui, lorsqu'une sortie élevée est requise, supprime la détérioration de la batterie de type capacité de celle-ci en maintenant la distribution de courant vers la batterie de type capacité, dont la température est plus difficile à abaisser, à l'intérieur d'une plage définie.
PCT/JP2017/037638 2016-10-18 2017-10-18 Système de batterie WO2018074502A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018546374A JP6752286B2 (ja) 2016-10-18 2017-10-18 電池システム

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016204007 2016-10-18
JP2016-204007 2016-10-18

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WO2018074502A1 true WO2018074502A1 (fr) 2018-04-26

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021100893A1 (fr) * 2019-11-19 2021-05-27 엘지전자 주식회사 Dispositif électronique et procédé de commande de charge de dispositif électronique
JP2021515510A (ja) * 2018-11-20 2021-06-17 エルジー・ケム・リミテッド バッテリー管理システム、バッテリーパック及び電気車両

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003282154A (ja) * 2002-03-26 2003-10-03 Nissan Motor Co Ltd 電源装置
JP2004364350A (ja) * 2003-06-02 2004-12-24 Nissan Motor Co Ltd ツインバッテリ搭載車のバッテリ制御装置
WO2014118903A1 (fr) * 2013-01-30 2014-08-07 株式会社 日立製作所 Système de batterie combiné
JP2016152718A (ja) * 2015-02-18 2016-08-22 三菱重工業株式会社 充放電制御装置、移動体及び電力分担量決定方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6157880B2 (ja) * 2013-03-04 2017-07-05 株式会社東芝 複数電池を有する二次電池システム及び充放電電力等の配分方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003282154A (ja) * 2002-03-26 2003-10-03 Nissan Motor Co Ltd 電源装置
JP2004364350A (ja) * 2003-06-02 2004-12-24 Nissan Motor Co Ltd ツインバッテリ搭載車のバッテリ制御装置
WO2014118903A1 (fr) * 2013-01-30 2014-08-07 株式会社 日立製作所 Système de batterie combiné
JP2016152718A (ja) * 2015-02-18 2016-08-22 三菱重工業株式会社 充放電制御装置、移動体及び電力分担量決定方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021515510A (ja) * 2018-11-20 2021-06-17 エルジー・ケム・リミテッド バッテリー管理システム、バッテリーパック及び電気車両
WO2021100893A1 (fr) * 2019-11-19 2021-05-27 엘지전자 주식회사 Dispositif électronique et procédé de commande de charge de dispositif électronique

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Publication number Publication date
JP6752286B2 (ja) 2020-09-09
JPWO2018074502A1 (ja) 2019-06-24

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