WO2020075301A1 - Dispositif de batterie d'accumulateurs - Google Patents

Dispositif de batterie d'accumulateurs Download PDF

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Publication number
WO2020075301A1
WO2020075301A1 PCT/JP2018/038198 JP2018038198W WO2020075301A1 WO 2020075301 A1 WO2020075301 A1 WO 2020075301A1 JP 2018038198 W JP2018038198 W JP 2018038198W WO 2020075301 A1 WO2020075301 A1 WO 2020075301A1
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WO
WIPO (PCT)
Prior art keywords
battery unit
voltage
battery
pair
charging
Prior art date
Application number
PCT/JP2018/038198
Other languages
English (en)
Japanese (ja)
Inventor
黒田　和人
関野　正宏
英生 山崎
岳史 大澤
敏彦 正岡
Original Assignee
株式会社東芝
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 株式会社東芝 filed Critical 株式会社東芝
Priority to PCT/JP2018/038198 priority Critical patent/WO2020075301A1/fr
Publication of WO2020075301A1 publication Critical patent/WO2020075301A1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • 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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the embodiment of the present invention relates to a storage battery device.
  • low voltage system power (12V system power)
  • high voltage system power (12V system power)
  • low voltage system power (12V system power) is also expected as power for maintaining the minimum safety function required for a vehicle.
  • the present invention has been made in view of the above, and an object thereof is to provide a storage battery device capable of simultaneously supplying low-voltage system power and high-voltage system power while maintaining reliability.
  • the storage battery device of the embodiment is a storage battery device that is installed in a vehicle and supplies electric power to an in-vehicle device, and has a plurality of battery cells connected in series between a pair of first charging / discharging terminals.
  • a first battery unit that supplies power via a first charge / discharge terminal, and a plurality of battery cells connected in series between a pair of second charge / discharge terminals, and a pair of second charge / discharge terminals are provided.
  • one second charging / discharging terminal is connected to the first charging / discharging terminal on the high potential side of the first battery unit, and the first charging / discharging terminal on the low potential side cooperates with the first battery unit.
  • a second battery unit that supplies high-voltage system power via the second charging / discharging terminal on the high potential side, and a DC voltage conversion of the power supplied from the first battery unit via the pair of first charging / discharging terminals. And can supply low-voltage system power through the low-voltage system power supply terminal 1 DC voltage converter and DC voltage conversion of electric power supplied from the second battery unit via the pair of second charging / discharging terminals, and connected in parallel to the first DC voltage converter at the low voltage system power supply terminal And a second DC voltage converter capable of supplying low voltage system power via the low voltage system power supply terminal.
  • FIG. 1 is a schematic block diagram of a vehicle storage battery system according to an embodiment.
  • FIG. 2 is a schematic configuration block diagram of the storage battery device.
  • FIG. 3 is a schematic configuration diagram of the DC-DC converter.
  • FIG. 4 is a processing flowchart of the embodiment.
  • FIG. 1 is a schematic block diagram of a vehicle storage battery system according to an embodiment.
  • the vehicular storage battery system 10 functions as a generator 12G that is driven by the engine 11 and is capable of generating power, or functions as an electric motor (motor) 12M that is supplied with electric power and assists the driving of the engine 11.
  • Power device 12 a storage battery device 13 that supplies power to the vehicle-mounted device, a controller 14 that measures the state of charge (voltage, charging current, and temperature) of the storage battery device 13 and controls the storage battery device 13, and a storage battery device.
  • the electric power device 12 is included in the second load group 16 when it functions as the electric motor 12M.
  • FIG. 2 is a schematic configuration block diagram of the storage battery device.
  • the storage battery device 13 includes a control circuit 21 that controls the storage battery device 13 as a whole, a first battery unit 22 that mainly supplies low-voltage system power, and a state (SOC, voltage, charging current, and temperature) of the first battery unit 22.
  • Status of the first monitoring circuit 23 that monitors and notifies the control result to the control circuit 21, the second battery unit 24 that cooperates with the first battery unit 22 to supply high-voltage power, and the state of the second battery unit 24.
  • a second monitoring circuit 25 for monitoring (SOC, voltage, charging current and temperature) and notifying the control circuit 21 of the monitoring result, and an input / output terminal T1 and an input / output terminal T2.
  • a first DC / DC converter 26 for performing conversion, a first input / output terminal T11 connected to the low potential side electrode of the first battery unit 22, and a second input / output terminal T11 connected to the high potential side electrode of the first battery unit 22.
  • a second DC / DC converter 27 having a terminal T21 and a second input / output terminal T22 connected to the high potential side terminal of the second battery unit 24, for performing DC / DC (direct current / direct current) conversion;
  • the ground terminal TG connected to the low potential side electrode of the one battery unit 22 and the first input / output terminal T11, and the input / output terminal T1 of the first DC / DC converter 26 and the first input / output terminal T12 of the second DC / DC converter.
  • the control circuit 21 includes a communication terminal TC for communicating with the controller 14.
  • the first battery unit 22 and the second battery unit 24 have the same configuration, and a plurality of battery cells 30 are connected in series.
  • the rated output voltage of the first battery unit 22 and the second battery unit 24 is 24 V
  • 24 V is output between the ground terminal TG and the second input / output terminal T2
  • the first DC / The DC converter 26 performs DC / DC conversion (step-down) on this, and outputs 12V (low voltage system power) between the ground terminal TG and the low voltage system power supply terminal TL.
  • 24V is output between the second input / output terminal T21 and the second input / output terminal T22
  • 12V is output between the first input / output terminal T11 and the first input / output terminal T12.
  • 48 V high voltage system power
  • the battery cell 30 is preferably a lithium-ion secondary battery or a nickel-hydrogen secondary battery because it has excellent output characteristics. Further, from the viewpoint of high weight energy density, the lithium ion secondary battery is more preferable.
  • a positive electrode having a larger operating voltage range than the maximum voltage of the cell is an iron phosphate-based positive electrode and a negative electrode is a carbon-based lithium ion secondary battery or a positive electrode is 3d.
  • a lithium ion secondary battery in which the negative electrode is a transition metal lithium oxide (eg, lithium manganate oxide, lithium nickel oxide, lithium cobalt oxide, etc.) and the negative electrode is lithium titanate oxide is more preferable.
  • the above-mentioned positive electrode is a 3d transition metal lithium oxide (for example, lithium manganate oxide).
  • a lithium ion secondary battery in which the negative electrode is a lithium titanate oxide (for example, Li 4 Ti 5 O 12 ) is more preferable.
  • the configuration of the battery cell 30 will be described in more detail.
  • a case where a lithium ion battery cell is used as the battery cell 30 will be described as an example.
  • a second mode of the battery cell 30 includes a lithium metal compound containing at least one metal element selected from the group consisting of cobalt, nickel and manganese, and the lithium metal compound is Li a Ni b Co c Mn.
  • a positive electrode having a positive electrode active material-containing layer represented by d O 4 (where molar ratios a, b, c and d are 0 ⁇ a ⁇ 1.1, b + c + d 2), and a titanium-containing metal composite oxide. It is configured as a non-aqueous electrolyte secondary battery including a negative electrode containing the same and a non-aqueous electrolyte containing a non-aqueous solvent.
  • the average particle diameter of the primary particles of lithium titanium oxide is 1 ⁇ m or less, and the specific surface area of the negative electrode layer by the BET method is 3 to 50 m 2. It is desirable that it be in the range of / g.
  • the lithium titanium oxide is represented by Li 4 + x Ti 5 O 12 (x is ⁇ 1 ⁇ x ⁇ 3) or Li 2 + x Ti 3 O 7 (x is ⁇ 1 ⁇ x ⁇ 3).
  • the titanium-containing metal composite oxide is a metal composite oxide containing Ti and at least one element selected from the group consisting of P, V, Sn, Cu, Ni and Fe. desirable.
  • the configurations of the first DC / DC converter 26 and the second DC / DC converter 27 will be described.
  • the first DC / DC converter 26 and the second DC / DC converter 27 have the same configuration, the second DC / DC converter 27 will be mainly described.
  • FIG. 3 is a schematic configuration diagram of the second DC-DC converter.
  • the second DC / DC converter 27 is a push-pull insulation type DC-DC converter, and includes an insulation transformer 31.
  • the first input / output terminal T12 connected to the first battery unit 22 is connected to the first intermediate tap 31T1 which is an intermediate tap on the primary winding side of the isolation transformer 31, and the first intermediate tap 31T1 is connected to the first battery unit 22 at one end thereof.
  • One end of the switch 32 is connected, and one end of the second switch 33 is connected to the other end of the primary winding.
  • the other end of the first switch 32 and the other end of the second switch 33 are connected to the first input / output terminal T11, respectively. Further, a current stabilizing capacitor 34 is connected between the first input / output terminal T11 and the first input / output terminal T12.
  • the second input / output terminal T22 connected to the second battery unit 24 is connected to the second intermediate tap 31T2, which is an intermediate tap on the secondary winding side of the insulation transformer 31, and is connected to one end of the secondary winding.
  • Is connected to one end of a third switch 35 and the other end of the secondary winding is connected to one end of a fourth switch 36.
  • the other end of the third switch 35 and the other end of the fourth switch 36 are connected to the second input / output terminal T21, respectively.
  • one end is connected to the second intermediate tap 31T2, and the coil 37 having the other end is connected to the second input / output terminal T22. Furthermore, between the connection point between the coil 37 and the second input / output terminal T21 and between the second input / output terminal T22, a capacitor 38 that functions in cooperation with the coil 37 and functions as a low-pass filter is connected.
  • the second DC / DC converter 27 also includes a current sensor 39 for detecting an output current to the second battery unit 24, a control signal from the control circuit 21, a detected voltage of the first battery unit 22, and a detected second battery.
  • a conversion operation circuit 40 that performs DC / DC conversion by controlling the first switch 32 to the fourth switch 36 based on the output current to the second battery unit 24 detected by the voltage and current sensor 39 of the unit 24. I have it.
  • the input / output terminal T1 of the first DC / DC converter 26 corresponds to the first input / output terminal T12 of the second DC / DC converter 27, and the second DC / DC converter
  • An input / output terminal (not shown) corresponding to the first input / output terminal T11 in 27 is connected to the ground terminal TG.
  • the input / output terminal T2 of the first DC / DC converter 26 corresponds to the second input / output terminal T22 of the second DC / DC converter 27, and corresponds to the second input / output terminal T21 of the second DC / DC converter 27.
  • the non-input / output terminal is connected to the ground terminal TG.
  • FIG. 4 is a processing flowchart of the embodiment.
  • the control circuit 21 determines whether or not the failure notification for notifying that the first battery unit 22 is in the failure state has been received from the first monitoring circuit 23 (step S11).
  • step S11 when the failure notification notifying that the first battery unit 22 is in the failure state has not been received from the first monitoring circuit 23 (step S11; No), the control circuit 21 performs the second monitoring. It is determined whether or not a failure notification for notifying that the second battery unit 24 is in a failure state has been received from the circuit 25 (step S12).
  • step S12 when the failure notification notifying that the second battery unit 24 is in the failure state has not been received from the second monitoring circuit 25 (step S12; No), the first DC / DC converter 26 and the The 2DC / DC converter 27 is driven and controlled to supply low-voltage system power (for example, 12V) from both (step S13).
  • the cell balance of the first battery unit 22 and the second battery unit 24 can be maintained similarly, and the first battery unit 22 and the second battery unit 22 can be maintained.
  • the two-battery unit 24 cooperates to supply high-voltage system power (for example, 48 V), it is possible to suppress a decrease in the effective storage capacity of the first battery unit 22 and the second battery unit 24.
  • control circuit 21 determines whether or not the activation signal WU is being received from the ECU (not shown) of the vehicle body (step S14).
  • step S14 when the activation signal WU is being received from the ECU (not shown) of the vehicle body (step S14; Yes), the control circuit 21 turns on the circuit breaker 28 (step S15).
  • low voltage system power for example, 12V
  • high voltage system power for example, 48 V
  • the failure notification is not received from both the first monitoring circuit 23 and the second monitoring circuit 25
  • the first battery unit 22 and the high voltage system power are output regardless of whether the low voltage system power or the high voltage system power is output.
  • the cell balance of the second battery unit 24 can be maintained, and the reduction of the effective storage amount at the time of high-voltage system power output can be suppressed.
  • step S14 when the activation signal WU is not being received from the ECU (not shown) of the vehicle body from the controller 14 (step S14; No), the breaker 28 is opened (or the open state is maintained). (Step S16), the process proceeds to step S11 again, and the above-described process is performed.
  • step S11 when the failure notification for notifying that the first battery unit 22 is in the failure state is received from the first monitoring circuit 23 (step S11; Yes), the control circuit 21 causes the first DC The / DC converter 26 is stopped (step S17). Next, the control circuit 21 determines whether or not the failure notification for notifying that the second battery unit 24 is in the failure state has been received from the second monitoring circuit 25 (step S18).
  • step S18 When it is determined in step S18 that the failure notification notifying that the second battery unit 24 is in the failure state has not been received from the second monitoring circuit 25 (step S18; No), the second DC / DC converter 27 is driven. Then, control is performed so as to supply low-voltage power (for example, 12 V) (step S19). Therefore, at this time, it is possible to supply the low voltage system power via the ground terminal TG and the low voltage system power supply terminal TL. Then, the process proceeds to step S22. In the determination of step S18, when the failure notification notifying that the second battery unit 24 is in the failure state is received from the second monitoring circuit 25 (step S18; Yes), the control circuit 21 causes the second DC / DC. The converter 27 is stopped (step S25). Therefore, at this time, the power supply is disabled.
  • step S18 determines the failure notification notifying that the second battery unit 24 is in the failure state has not been received from the second monitoring circuit 25 (step S18; No).
  • step S12 when the failure notification notifying that the second battery unit 24 is in the failure state is received from the second monitoring circuit 25 (step S12; Yes), the control circuit 21 causes the second DC / DC.
  • the converter 27 is stopped (step S20).
  • control circuit 21 drives the first DC / DC converter 26, Control is performed so as to supply low voltage system power (for example, 12 V) (step S21).
  • the control circuit 21 requests the controller 14 to open the circuit breaker 28 (step S22). It should be noted that the request for permitting the opening of the circuit breaker 28 is not performed when the cell voltage or the cell temperature is in a state immediately before the occurrence of the dangerous event, but the circuit breaker 28 is immediately opened.
  • control circuit 21 determines whether or not the controller 14 permits the circuit breaker 28 to open the circuit breaker (step S23). If it is determined in step S23 that the controller 14 has not yet permitted the circuit breaker to open (step S23; No), the control circuit 21 again shifts the process to step S22 and enters the standby state.
  • step S23 When it is determined in step S23 that the controller 14 permits the circuit breaker to open (step S23; Yes), the control circuit 21 opens the circuit breaker 28 (step S24), and the process proceeds to step S11 again. To do.
  • the present embodiment it is possible to supply the low voltage system power and the high voltage system power at the same time, and at least one of the first battery unit 22 and the second battery unit 24 is supplied.
  • the power cannot be supplied, it is possible to continue supplying the low-voltage power through the corresponding DC voltage converter (DC / DC converter), improving the reliability of the low-voltage power supply. Can be made.
  • the cell balance of the battery cells forming each of the first battery unit 22 and the second battery unit 24 due to the difference in the usage frequency of the first battery unit 22 and the second battery unit 24 can be constantly maintained,
  • the charge / discharge capacity of the storage battery device, in particular, the charge / discharge capacity of high-voltage power can be secured for a long time.
  • the program executed by the storage battery device of the present embodiment is a file in an installable format or an executable format, and can be read by a computer such as a semiconductor storage device such as a CD-ROM, a DVD (Digital Versatile Disk), or a USB memory. It is provided by being recorded in a recording medium.
  • a computer such as a semiconductor storage device such as a CD-ROM, a DVD (Digital Versatile Disk), or a USB memory. It is provided by being recorded in a recording medium.
  • the program executed by the storage battery device of the present embodiment may be stored in a computer connected to a network such as the Internet and provided by being downloaded via the network.
  • the program executed by the storage battery device of the present embodiment may be provided or distributed via a network such as the Internet.
  • the program executed by the storage battery device according to the present embodiment may be incorporated in a ROM or the like in advance and provided.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Selon un mode de réalisation, la présente invention concerne un dispositif de batterie d'accumulateurs qui comprend : une première unité de batterie qui comprend une pluralité d'éléments de batterie connectés en série, et qui fournit une puissance par le biais d'une paire de premières bornes de charge-décharge ; une deuxième unité de batterie qui comprend une pluralité d'éléments de batterie connectés en série, a une deuxième borne de charge-décharge connectée à la première borne de charge-décharge à haut potentiel de la première unité de batterie, et fournit une puissance à haute tension par le biais de la première borne de charge-décharge à faible potentiel et d'une deuxième borne de charge-décharge à haut potentiel en tandem avec la première unité de batterie ; un premier convertisseur de tension en CC qui convertit la puissance, fournie par la première unité de batterie par le biais de la paire de premières bornes de charge-décharge, en tension en CC, et peut fournir une puissance à basse tension ; et un deuxième convertisseur de tension en CC qui convertit la puissance, fournie par la deuxième unité de batterie par le biais de la paire de deuxièmes bornes de charge-décharge, en tension en CC, est connecté à une borne d'alimentation électrique à basse tension en parallèle avec le premier convertisseur de tension en CC, et peut fournir une puissance à basse tension. Par conséquent, il est possible de fournir simultanément une puissance à basse tension et une puissance à haute tension tout en maintenant la fiabilité.
PCT/JP2018/038198 2018-10-12 2018-10-12 Dispositif de batterie d'accumulateurs WO2020075301A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/JP2018/038198 WO2020075301A1 (fr) 2018-10-12 2018-10-12 Dispositif de batterie d'accumulateurs

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Application Number Priority Date Filing Date Title
PCT/JP2018/038198 WO2020075301A1 (fr) 2018-10-12 2018-10-12 Dispositif de batterie d'accumulateurs

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WO2020075301A1 true WO2020075301A1 (fr) 2020-04-16

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016208832A (ja) * 2015-04-21 2016-12-08 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． バッテリ制御装置、バッテリモジュール、バッテリパック、及びバッテリ制御方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016208832A (ja) * 2015-04-21 2016-12-08 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． バッテリ制御装置、バッテリモジュール、バッテリパック、及びバッテリ制御方法

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