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WO2013024541A1 - Dispositif de surveillance d'éléments et dispositif de commande d'éléments équipé de celui-ci - Google Patents

Dispositif de surveillance d'éléments et dispositif de commande d'éléments équipé de celui-ci Download PDF

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Publication number
WO2013024541A1
WO2013024541A1 PCT/JP2011/068690 JP2011068690W WO2013024541A1 WO 2013024541 A1 WO2013024541 A1 WO 2013024541A1 JP 2011068690 W JP2011068690 W JP 2011068690W WO 2013024541 A1 WO2013024541 A1 WO 2013024541A1
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WO
WIPO (PCT)
Prior art keywords
balancing
cell
battery
voltage
controller
Prior art date
Application number
PCT/JP2011/068690
Other languages
English (en)
Japanese (ja)
Inventor
光夫 野田
彰彦 工藤
洋平 河原
Original Assignee
日立ビークルエナジー株式会社
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 日立ビークルエナジー株式会社 filed Critical 日立ビークルエナジー株式会社
Priority to JP2013528890A priority Critical patent/JP5727016B2/ja
Priority to PCT/JP2011/068690 priority patent/WO2013024541A1/fr
Publication of WO2013024541A1 publication Critical patent/WO2013024541A1/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
    • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/22—Balancing the charge of battery modules
    • 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
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
    • 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
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • 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
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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 present invention relates to a battery monitoring device and a battery control device provided with the same.
  • a hybrid vehicle in order to secure a desired high voltage, an assembled battery configured by connecting in series a large number of unit cells of a secondary battery such as a lithium ion battery is used.
  • control of single battery cells is performed using a control IC (cell controller IC) that manages and controls the charge / discharge state of each single battery cell (see, for example, Patent Document 1).
  • secondary batteries such as lithium ion batteries may have problems such as increased heat generation if charge and discharge are not performed in an appropriate SOC range. Therefore, in a power storage device using a lithium ion battery, the voltage of each unit cell (lithium ion battery cell etc.) constituting the assembled battery is measured, and each charge state (SOC) of each unit cell is equalized.
  • a cell controller IC is used which performs cell balancing to discharge stored charges of single cells and equalize the SOC of each single cell.
  • the charge operation time capacity is determined by the unit cell with high SOC
  • the discharge operation time capacity is determined by the unit cell with low SOC. Capacity is reduced.
  • the SOC rises faster than the other single batteries due to charging, but if charging is performed with a high SOC, the deterioration is further accelerated. Since the life of the battery group is determined by the deteriorated single battery, the variation in SOC among the single batteries also shortens the life as the battery group.
  • balancing discharge of other unit cells is performed so as to match the unit cell with the lowest SOC in the assembled battery.
  • the discharge time is controlled by the average SOC of all single battery cells, and this SOC is obtained from the voltage between terminals measured in each single battery. The voltage between the terminals can not be accurately determined during the balancing discharge. Therefore, in order to equalize the charge states of all the single battery cells, for example, as described in Patent Document 2, the average SOC is calculated based on the voltage between the terminals of all the single battery cells at predetermined time intervals. An operation is performed such that the SOCs of all the single battery cells converge by repeating the discharge a plurality of times.
  • a battery monitoring device for controlling a cell group in which a plurality of single battery cells are connected in series, the first control unit measuring the voltage between terminals of the single battery cells A second control unit for performing balancing discharge of the unit cell, and a plurality of connecting each of the positive and negative electrodes of the unit cell and the first control unit for measuring the voltage between the terminals of the unit cell A voltage detection line, each voltage detection line is provided with a first resistor, and in the second control unit, the balancing is branched from each voltage detection line on the unit cell side with respect to the first resistor A line is connected, the balancing line is provided with a second resistor, and the second control unit is connected between the balancing line connected to the positive electrode of the single battery cell and the balancing line connected to the negative electrode.
  • Battery cell Comprising a balancing switch for lancing discharge every single cell.
  • the battery monitoring device is provided correspondingly and the first communication path for transmitting a start signal for starting the plurality of first control units from the host controller and the start for starting the plurality of second control units
  • a battery monitoring device according to the second aspect and a host control device connected via the first to sixth communication paths of the second aspect and an isolation element.
  • the battery control device controls the first control unit to measure the inter-terminal voltage of one unit cell. Measurement of the voltage across the terminals of the balancing switch that performs balancing discharge of the single battery cell by controlling the second control unit in synchronization with the balancing discharge of the single battery cell, and The host control device may calculate the balancing current of the single battery cell from the measurement result of the inter-terminal voltage, the measurement result of the inter-terminal voltage of the balancing switch by the second control unit, and the resistance value of the second resistor. preferable.
  • the battery control device calculates the balancing current based on the balancing current calculation unit and the balancing current calculated by the balancing current calculation unit. It is preferable to have the SOC calculating part which calculates the charge condition (SOC) of this single battery cell.
  • the battery control device preferably executes the calculation by the balancing current calculation unit and the calculation by the SOC calculation unit in real time.
  • the battery control device prevents two adjacent balancing switches from turning on simultaneously.
  • a battery monitoring device that controls a cell group in which a plurality of single battery cells are connected in series, and the first inter-terminal voltage of the plurality of single battery cells is measured Control unit and a balancing switch for shorting positive and negative terminals of each of the plurality of single battery cells, and closing the balancing switch to perform balancing discharge on each of the plurality of single battery cells.
  • the unit, and a plurality of voltage detection lines and a plurality of cell voltage input resistances for measuring a voltage between terminals of a plurality of single battery cells with a first control unit, and a balancing discharge for each of a plurality of single battery cells A plurality of balancing lines and a plurality of balancing resistors to be performed by the second control unit.
  • the balancing is performed so that the balancing discharge current when performing the balancing discharge in the second control unit does not pass through the cell voltage input resistance. It is preferable that a line, a balancing resistor, a voltage detection line, and a cell voltage input resistance be disposed.
  • the inter-terminal voltage measurement and the balancing discharge control performed respectively in the first control unit and the second control unit are Preferably, it is performed in synchronization with the target single battery cell.
  • the balancing current can be accurately and always detected. Therefore, it is not necessary to repeat the measurement of the voltage between terminals of each unit cell and the discharging operation alternately in order to make the SOC of all unit cells uniform, and it becomes possible to make the SOC in a short time.
  • FIG. 1 It is a structural example of the drive system of the electric vehicle provided with the electrical storage apparatus incorporating the battery control apparatus containing the battery monitoring apparatus by this invention.
  • the battery controller shown in FIG. 1 is a configuration example of a drive system of an electric vehicle further including a circuit for detecting a total voltage of a battery system. Between main cell controllers, between sub cell controllers, and main cells in a battery control device including a plurality of cell controller IC pairs each including one main cell controller IC and one sub cell controller IC shown in FIGS. 1 and 2 It is a figure explaining the communication path between a cell controller, a subcell controller, and a microcomputer.
  • FIG. 1 It is a structural example of the drive system of the electric vehicle provided with the electrical storage apparatus incorporating the battery control apparatus containing the battery monitoring apparatus by this invention.
  • the battery controller shown in FIG. 1 is a configuration example of a drive system of an electric vehicle further including a circuit for detecting a total voltage of a battery system. Between main cell controllers, between sub
  • FIG. 3 is a schematic diagram for describing the sharing of functions of a set of main cell controller IC and sub cell controller IC that controls one cell group shown in FIG. 1 or 2.
  • main cell controller IC and the sub cell controller IC having a common internal configuration, it is a schematic diagram for describing the configuration of the main cell controller IC. It is a figure which shows the outline of an internal structure of the logic part shown in FIG. It is a figure explaining the example of the OCV-SOC conversion curve which is the characteristic of a lithium ion battery, and the error when computing SOC from OCV using this conversion curve. It is a schematic flowchart explaining the balancing discharge operation and balancing current calculation of the single battery cell in the battery control device including the battery monitoring device according to the present invention.
  • a power storage device mounted with a battery control device including a battery monitoring device (cell controller) is a hybrid vehicle (HEV), a plug-in hybrid vehicle (PHEV), an electric vehicle (EV), etc. It is an example at the time of applying to the accumulation-of-electricity device provided with the battery system used for the vehicles of 1.
  • the present invention is not limited to HEVs, PHEVs, and EVs, and can be widely applied to various power storage devices mounted on vehicles equipped with an electric drive device, such as railway vehicles, for example.
  • HEVs are not pure electric vehicles, the present invention is widely applicable to electric vehicles including them, so electric vehicles in the following description also include hybrid vehicles.
  • a lithium ion battery having a voltage in the range of 3.0 to 4.2 V (average output voltage: 3.6 V) is assumed as a storage / discharge device to be the minimum unit of control.
  • any other device that can store and discharge electricity can be used to limit its use if the SOC (State of Charge) is too high (overcharged) or too low (overdischarge).
  • SOC State of Charge
  • they are collectively referred to as a single battery or single battery cell.
  • a plurality of (generally several to dozens of) single battery cells connected in series is called a cell group, and a plurality of cell groups connected in series is a battery module.
  • a plurality of cell groups or battery modules connected in series or in series and parallel is called a battery system.
  • the cell group, the battery module and the battery system are generically called an assembled battery.
  • a cell controller IC is provided for each cell group, which detects the cell voltage of each single battery cell and monitors the battery state while performing balancing operation and the like.
  • Power storage device 100 is connected to inverter 800 via relays 700 and 710, and inverter 800 is connected to motor 900.
  • discharge power is supplied from the power storage device 100 to the motor 900 through the inverter 800.
  • regenerative power from motor 900 is charged to power storage device 100 through inverter 800.
  • the inverter 800 includes an inverter circuit including a plurality of semiconductor switching elements, a gate drive circuit of the semiconductor switching elements, and a motor controller that generates a pulse signal for performing PWM control of the gate drive circuit. 1 and 2 are omitted.
  • Power storage device 100 mainly includes a cell group 102 composed of a plurality of lithium ion single battery cells 101, a battery system 104 in which a plurality of cell groups 102 are connected in series, and an inter-terminal voltage of each single battery cell 101
  • Cell controller (battery monitoring apparatus) 200 including a plurality of cell controller IC pairs 300 including a main cell controller IC 301 for detecting the main cell controller IC 301 and a sub cell controller IC 302 mainly performing balancing discharge operation of each single battery cell 101; And a battery controller 500 that determines the state of each single battery cell.
  • the battery controller 500 communicates with the plurality of main cell controller ICs 301 and subcell controller ICs 302 via the insulating element group 400 (details will be described later) to control the main / subcell controller ICs 301, 302.
  • the cell controller IC pair 300 is provided for each cell group 102 as described above.
  • a voltage detection line between the battery system 104 and the cell controller 200 is connected to the cell controller 200 by a connector (not shown).
  • Battery controller 500 includes a current detection circuit 502 connected to current sensor 503 for detecting a charge / discharge current flowing to battery system 104, and a battery controller including communication between cell controller 200 and inverter 800 and a higher level vehicle controller not shown. And a microcomputer 504 which performs control of the entire 500.
  • a total voltage measurement circuit 801 that measures the total voltage of the battery system 104 is provided inside the inverter 800. That is, the cell controller 200 functions as a battery monitoring device that detects the voltage between terminals of each single battery cell and monitors the state of each single battery cell, and the host controller connected to the cell controller 200 via a communication path
  • a battery control device 600 including the battery controller 500 manages the state of the battery system and controls the charge state of each single battery cell.
  • FIG. 2 shows an example in which the total voltage detection circuit 501 is also installed in the battery controller 500. As described later, if the total voltage of the battery system 104 can be measured, the total voltage detection circuit 501 may not be provided inside the battery controller 500 as shown in FIG. 1.
  • the battery controller 500 transmits a command to perform OCV (open circuit voltage) measurement of all single battery cells monitored by the main cell controller 301 of the cell controller 200 via the insulating element group 400.
  • OCV open circuit voltage
  • the measured OCV data of each single battery cell is transmitted from the cell controller 200 to the battery controller 500 via the isolation element group 400 in cell group units.
  • the battery controller 500 converts the received OCV of each single battery cell into the SOC using the relationship between the OCV and the SOC (for example, the OCV-SOC curve in FIG. 4) which has already been measured and converted into data, and the entire single battery cell is Calculate the deviation of SOC.
  • a single battery cell whose SOC deviation is larger than a predetermined value is an object to perform balancing discharge. Note that this OCV measurement is performed with all the balancing switches 222 (see FIG. 4) turned off and is usually performed by the main cell controller 301, but may be performed by the sub cell controller 302.
  • the battery controller 500 issues a command to perform balancing discharge of the single battery cell targeted for the balancing discharge for a predetermined short time, and at the same time the inter-terminal voltage VBS of the balancing switch (balancing switch BS1 performing balancing discharge).
  • the inter-terminal voltage is sent to the subcell controller IC 302 for performing measurement of VBS1).
  • the measurement of the inter-terminal voltage VC BS (the inter-terminal voltage of the cell 1 is described as VC1 BS ) of the unit cell performing balancing discharge to the main cell controller 301 A command is sent.
  • the VBS (measured by the subcell controller IC 302) is transmitted to the battery controller 500 as in the case of the OCV measurement described above. The details of the measurement of VC BS and VBS will be described later.
  • the time until the deviation of the SOC of the single battery cell subjected to the balancing discharge becomes 0 is calculated, and the balancing switch in the subcell controller IC 302 is calculated by this time.
  • a command to perform a control operation to turn on is sent from the battery controller 500 to the cell controller 200, and balancing discharge of the single battery cell to be balanced is performed.
  • VC BS and VBS can be measured even when inverter 800 is connected as a load to power storage device 100. Further, based on the measured values of VC BS and VBS at this time, it is possible to finely control the balancing discharge so that each single battery cell is not in the overdischarged state.
  • a vehicle controller (not shown) that is the inverter 800 or a host controller Storage device 100 is connected to inverter 800 and motor 900 with relay 700 and relay 710 turned on, inverter 800 receives a charge / discharge command from the vehicle controller, and inverter 800 operates to drive motor 900. At the same time, charge and discharge operations of power storage device 100 are performed.
  • battery controller 500 measures the charging and discharging current and the total voltage at regular intervals.
  • the battery controller 500 calculates the state of charge (SOC) of the assembled battery and the internal resistance (DCR) of the battery in real time (calculation method is omitted) from the obtained values of the total voltage and the charge / discharge current.
  • SOC state of charge
  • DCR internal resistance
  • current or power that can be charged / discharged by the battery system 104 is calculated in real time from these values and transmitted to the inverter 800, and the inverter 800 controls charging / discharging current or power within that range.
  • the total voltage is not directly measured by the battery controller 500, and the total voltage value is obtained from the measured voltage of each single battery cell in the cell controller 200.
  • FIG. 3 shows an example of communication connection between the main cell controller ICs 301a to 301d and subcell controller ICs 302a to 302d in the cell controller (battery monitoring device) 200 and the microcomputer 504 in the battery controller 500.
  • the microcomputer 504 has an activation signal output port for outputting an activation signal for activating the main cell controller ICs 301a to 301d or the subcell controller ICs 302a to 302d in the cell controller 200, and an input / output port SDAT for transmitting and receiving commands and data.
  • a clock signal output port SCLK for synchronous transmission / reception of command and data and operation of the main cell controller IC 301 or the sub cell controller IC 302. As shown in FIG.
  • the SDAT output port, the SCLK output port, and the start signal output port are separately provided for the main cell controller and the sub cell controller. These output ports are configured in the same manner for the main cell controller and for the sub cell controller.
  • serial communication is used for each of the transmission and reception paths of the synchronous clock and the command and data.
  • the battery module 103 in which two cell groups 102 in which a plurality of single battery cells are connected in series are connected in series is disposed above and below the service disconnect switch (hereinafter referred to as SD-SW) 105.
  • the number of cell groups constituting the battery module 103 is not limited to two, and may be three or more.
  • the battery system 104 is configured of, for example, 96 single battery cells. As illustrated in FIG. 4, when each cell group is configured of 12 single battery cells, four cell groups are connected in series at the top and the bottom of the SD-SW 105, respectively.
  • Cell controller IC pairs 300a to 300d are provided corresponding to the cell groups 102a to 102d shown in FIG.
  • the lowermost cell controller IC pair 300a in FIG. 3 is used as the uppermost cell controller IC pair which receives the signal from the microcomputer 504 first.
  • the topmost cell controller IC 300d of FIG. 3 may be configured as the topmost cell controller IC pair.
  • the cell controller IC pairs 300a to 300d are not particularly limited.
  • the main cell controller IC or the sub cell controller IC is simply referred to, the main cell controller ICs 301 a to 301 d and the sub cell controller ICs 302 a to 302 d are not particularly limited.
  • the cell groups 102a to 102d when these are not particularly limited, they are called cell groups or cell groups 102.
  • the main cell controller IC and the sub cell controller IC will be collectively referred to.
  • the service disconnect switch (SD-SW) 105 is a switch that is often used in high-voltage assembled batteries, and interrupts the current path of the assembled battery by opening the SD-SW 105 at the time of maintenance and inspection. The purpose is to prevent electric shock. If the SD-SW 105 is opened, the series connection of the batteries is cut off, and no high voltage is applied to the human body even if a human touches the highest and lowest terminals of the battery pack. Can be prevented.
  • the communication path of the main cell controller IC 301 and the communication path of the sub cell controller IC 302 are configured separately, they have completely the same configuration. In the following description of the communication path, the communication path of the main cell controller IC 301 will be described, but the configuration of the communication path of the sub cell controller IC 302 is the same. Note that, for convenience of illustration, in FIG. 3, the main cell controller IC 301 and its communication path are shown larger than the sub cell controller IC 302.
  • the command and data signals are transmitted from the transmission / reception port SDAT of the microcomputer 504 to the communication terminal SDAT1 of the uppermost main cell controller IC 301a through the high-speed insulating element 401 and the capacitor 403.
  • the activation signal output port is connected to the activation signal input terminal WU_Rx of the cell controller IC 301a through the low speed isolation element 402.
  • the clock signal is transmitted from the SCLK output port to the communication terminal SCLK1 of the main cell controller IC 301a through the high-speed insulating element 402 and the capacitor 403.
  • the communication terminal SDAT2 of the uppermost main cell controller IC301a is connected by capacitor coupling to the communication terminal SDAT1 of the main cell controller IC301b one lower level, and the communication terminal SCLK2 is capacitor-coupled to the communication terminal SCLK1 of the main cell controller IC301b.
  • the start output terminal WU_Tx of the main cell controller IC 301a is connected to the start signal input terminal WU_Rx of the main cell controller IC 301b one lower than the main cell controller IC 301a.
  • These high speed insulation elements 401, low speed insulation elements 402, and capacitors 403 are used in communication paths between the microcomputer 504 and the top main cell controller IC 301a and between the top sub cell controller IC 302a. Insulating elements are collectively referred to as an insulating element group 400 (FIGS. 1 and 2).
  • the high-speed insulation element 401 common to the communication line of command and data signal and the communication line of the clock is used, this assumes that the thing of 2 channels is used for the high-speed insulation element It is for.
  • separate high speed isolation elements may be provided for the command and data signal communication lines and the clock communication lines.
  • a capacitor is used to insulate the communication path of the command and data signals between the two main cell controllers 301 or two sub cell controllers IC 302 and the communication path of the clock signal, a high speed insulating element 401 is used instead of the capacitor. You may use.
  • a start signal is also output from the start signal output port of the microcomputer 504 to the main cell controller IC 301c on the upper side (lower side) of the SD-SW 105 in FIG.
  • the microcomputer 504 When the cell controller 200 is activated, the microcomputer 504 outputs an activation signal, and the main cell controller IC 301a, the subcell controller IC 302a, the main cell controller IC 301c, and the subcell controller IC 302c receive the activation signal through the low speed isolation element 402 and start up. Be done.
  • the activated main cell controller IC and sub cell controller IC respectively output activation signals to the main cell controller IC and sub cell controller IC of the next stage. Thus, all the cell controller IC pairs 300 are sequentially activated.
  • the start command (start signal) of the main cell controller IC and the start command of the subcell controller IC are transmitted from the battery controller 500 to the uppermost main cell controller ICs 301a and 301c and the uppermost subcell controller ICs 302a and 302c almost simultaneously. That is, the main cell controller IC and the sub cell controller IC are activated almost simultaneously.
  • the low-speed insulating element 402 uses an insulating element such as a photocoupler that can also transmit a DC signal.
  • Starting signals from the microcomputer 504 to the main cell controller IC 301a, the subcell controller IC 302a, the main cell controller IC 301c, and the subcell controller IC 302c are generated by a DC signal or a pulse signal having a relatively wide time width. This is because noise and voltage fluctuation are likely to occur at the time of activation of power storage device 100, and this effect is removed.
  • a signal for activating the next main cell controller IC 301 or sub cell controller IC 302 from the main cell controller IC 301 a and the sub cell controller ICs 302 a or 301 c and 302 c which are activated first is performed by a short pulse or an AC pulse signal.
  • the microcomputer 504 After activation of the cell controller 200, the microcomputer 504 transmits a command signal and data (data packet) to the communication terminals SDAT1 of the main cell controller IC 301a and the sub cell controller IC 302a through the high speed insulating element 401.
  • the main cell controller IC 301a or the sub cell controller IC 302a receives the command signal and the data packet, respectively, and transmits them from the communication terminal SDAT2 to the next main cell controller IC 301 b or the sub cell controller IC 302 b. In this way, all the main cell controllers IC 301a to 301d receive the command signal and data, and operate according to the command signal and data.
  • the microcomputer 504 and the plurality of main cell controller ICs 301, and the microcomputer 504 and the plurality of sub cell controller ICs 302 are connected in a so-called daisy chain form by a bidirectional communication path.
  • the data packet transmitted from the microcomputer 504 to the main cell controller IC 301 a or the sub cell controller IC 302 is read back to the microcomputer 504 through the bi-directional communication path, and this data packet is read by the main cell controller IC 301 or the sub cell controller IC 302. It is checked if it has been read.
  • the communication path between the main cell controller IC 301 and the communication path between the sub cell controller IC are different paths. Communication from the main cell controller IC to the sub cell controller IC at a high speed. Although it is possible to connect all the main cell controller ICs 301 and all the sub cell controller ICs 302 by the same communication path, the communication path becomes longer by that amount, so the battery controller to the last main cell controller IC 301 or the last sub cell controller IC 302 It will take time for the commands and data from 500 to arrive. Further, also in the case where the main cell controller IC and the sub cell controller IC are operated synchronously as described below, the communication path between the main cell controller IC 301 and the communication path between the sub cell controller ICs are different. It is easy to take.
  • the microcomputer 504 obtains the inter-terminal voltage (referred to as a cell voltage) of the unit cells of the cell groups 102a to 102d and status data such as an overdischarged or overcharged state as follows.
  • Each of the main cell controllers IC301a to 301d adds data to the data packet, and transmits it from the communication terminal SDAT2 to SDAT1 of the next main cell controller IC.
  • the data packet to which the state data of all the single battery cells managed by the main cell controller IC 301 is added is, as a data packet including the command signal transmitted by the microcomputer 504, the microcomputer 504 via the bidirectional communication path. To receive.
  • FIG. 4 and 5 are explanatory diagrams showing an outline of the internal configuration of the cell controller IC.
  • 4 schematically shows the cell controller IC pair 300
  • FIG. 5 shows the internal configuration of the main cell controller IC 301 in somewhat more detail.
  • the internal configuration of the subcell controller IC 302 is exactly the same as the main cell controller IC.
  • FIG. 6 shows a schematic configuration of the logic unit 213 provided in the main cell controller IC and the sub cell controller IC.
  • the cell group 102 is configured of twelve single battery cells 101 (referred to as cells 1 to 12).
  • the cell group 102 and the main cell controller IC 301 for controlling the same are connected to the CV terminals (CV1 to CV13 terminals) for voltage detection through voltage detection lines SL1 to SL13 for detecting the voltage of each unit cell. It is connected.
  • a capacitor Cterm for protection is provided between two adjacent voltage detection lines in a portion close to the cell group 102 among the voltage detection lines SL1 to SL13 on the cell controller 200 side. The purpose of this is to allow noise that penetrates the cell controller 200 from the cell group side or the inverter 800 side connected to the battery system 104 to pass through, and is a so-called capacitor for ESD protection.
  • Both ends of each single battery cell that is, the positive electrode terminal and the negative electrode terminal are respectively connected to the CV terminal via the cell voltage input resistance Rcv 202, and the cell voltage input capacitor Cin 203 is connected between the CV terminal and the adjacent CV terminal. It is connected.
  • the cell voltage input resistor Rcv 202 and the cell voltage input capacitor Cin 203 constitute an RC filter, and noise caused mainly by the ripple voltage superimposed on the cell voltage due to the operation of the inverter 800 is suppressed.
  • balancing connection lines BL1 to 13 branched from the voltage detection lines SL1 to 13 in the cell controller 200 are connected to the sub cell controller IC 302.
  • a balancing resistor (Rb) 201 for balancing discharge is provided on these balancing connection lines BL1 to 13. Voltage terminals at both ends of each single battery cell are connected to the balancing terminal (BS terminal) CBS1 through the balancing resistor (Rb) 201.
  • a balancing terminal capacitor Cb 204 is connected to each BS terminal between adjacent BS terminals.
  • this balancing resistor 201 and balancing terminal capacitor 204 constitute an RC filter to suppress noise mainly caused by the ripple voltage superimposed on the cell voltage due to the operation of the inverter 800.
  • the BS terminals (CBS1 to 13) of the sub cell controller IC 302 are equivalent to the CV terminals (CV1 to 13) for voltage detection of the main cell controller IC 301, as described above, the main function of the sub cell controller is the cell group Since the balancing discharge of each single battery cell 102 is performed, another name is used here.
  • the name of the cell voltage input resistor 202 is Rcv and the name of the balancing resistor 201 is Rb in the above description, in the following description, it is assumed that the respective resistance values are also Rcv and Rb.
  • a balancing switch (BS) 222 for supplying balancing current is connected to the inside of the sub cell controller IC 302. When the balancing switch BS 222 is turned on, the balancing current of the cell flows through the balancing resistor 201.
  • a balancing switch (BS) 222 is similarly provided inside the main cell controller IC 301.
  • the balancing switch of the main cell controller IC 301 is mainly used for detecting disconnection of the voltage detection line, but will not be described in detail here.
  • the BS terminal for balancing discharge of each single battery cell and the CV terminal for measuring the voltage between terminals are provided in separate cell controller ICs as dedicated terminals. It is done.
  • the balancing discharge circuit configured of balancing resistor Rb201 and balancing switch BS222 of sub-cell controller IC 302 has voltage detection lines SL1 to 13 via balancing connection lines BL1 to 13 on the single battery cell side from cell voltage input resistor Rcv 202. It is connected to the.
  • the balancing current does not flow through the cell voltage input resistor Rcv 202, an accurate inter-terminal voltage measurement in the main cell controller IC 301 is possible.
  • the balancing resistance Rb201 and balancing terminal capacitor Cb204 of the balancing discharge circuit, and on / off of the balancing switch 222 of the subcell controller IC 302 are each unit cell in the main cell controller IC301. Does not affect the voltage measurement across terminals. Conventionally, as described in, for example, Japanese Patent Laid-Open No. 2010-228523, measurement of voltage between terminals of each unit cell and balancing discharge are performed by one cell controller IC, and one of circuits for balancing discharge is used. Since the unit is common to the circuit for measuring the voltage between terminals (the voltage detection line and the cell voltage input resistance), the voltage between terminals is lowered when the balancing discharge is performed. Therefore, accurate terminal voltage measurement was performed with the balancing discharge stopped.
  • the CV terminal or the BS terminal is connected to the input terminal (Min terminal, Min1 to Min13) of the multiplexer 210 inside the cell controller IC.
  • the multiplexer 210 selects each cell and outputs its positive electrode potential and negative electrode potential, and is controlled by the output from the multiplexer input selection register 245 of the logic unit 213.
  • the output of the multiplexer 210 is converted into the voltage between the terminals of each unit cell through the differential amplifier 211, and the voltage is converted into a digital value by the AD converter 212.
  • the operation of the AD converter 212 is controlled by the logic unit 213, and the output of the AD converter 212 is processed by the logic unit 213. That is, voltage measurement is performed by the differential amplifier 211 and the AD converter 212.
  • the AD converter 212 for example, a high speed AD converter such as a successive approximation type is adopted. By using such a high-speed AD converter, it is possible to perform high-speed diagnosis of a multiplexer described later. If there is a noise component in the signal, the high-speed AD converter detects this as it is and AD converts it. Therefore, a cell voltage input resistor Rcv 202 and a cell voltage input capacitor Cin 203 are provided on each of the voltage detection lines connected to the CV terminal of the main cell controller IC 301 for measuring the inter-terminal voltage of the single battery cell to configure an RC filter The noise is removed and then input to the AD converter 212 via the multiplexer 210 and the differential amplifier 211.
  • FIG. 6 shows an outline of the configuration of the logic unit 213.
  • the logic unit 213 of the main cell controller IC 301 and the sub cell controller IC 302 has exactly the same configuration and function.
  • the main cell controller IC 301 will be described below as an example.
  • the detected voltage signal from the AD converter 212 is input to the logic unit 213.
  • the output of the AD converter 212 is the voltage between the terminals of the unit cell selected by the multiplexer 210, or the voltage between two voltage detection lines connected to the input terminals Min1 to Min13. It is stored in the result register 244.
  • the inter-terminal voltage of each single battery cell stored in voltage measurement result register 244 and the disconnection detection result or diagnosis result stored in diagnosis result register 243 are transmitted from main cell controller IC 301 through the communication line. It is transmitted to the host controller (battery controller 500).
  • the logic unit 213 includes a register that controls various switches provided in the main cell controller IC 301.
  • the multiplexer input selection register 245 stores data for switching the multiplexer 245 to select an input.
  • the balancing switch control register 247 stores data for controlling on / off of the balancing switch 222 provided for each cell.
  • the balancing switch of the sub cell controller IC 302 is used.
  • the balancing switch of the main cell controller IC301 is used when diagnosing disconnection of the voltage detection lines SL1 to 13, etc., but is off except for the normal operation of the main cell controller IC301 such as measuring the voltage between terminals of single battery cells. ing.
  • the operation power of the main cell controller IC 301 and the sub cell controller IC 302 is supplied from respective Vcc terminals (see FIG. 5). Since the configurations of the main cell controller IC 301 and the sub cell controller IC 302 are completely the same, only the main cell controller IC 301 is shown as a representative in FIG.
  • the Vcc terminal is connected to the power supply unit 226 in the main cell controller IC 301, and a regulator (not shown) therein supplies the power supply VDD including the logic unit.
  • the power supply VDD also supplies power to circuits operating at Vdd outside the main cell controller IC 301, but this is omitted.
  • the power supply unit 226 has a start signal detection circuit (not shown) that is started by the output of the start signal detection unit 216, and receives the start signal from the upper main cell controller IC 301 or the microcomputer 504 via the isolation element 402. , Supply power to the regulator, and perform start-up and POR (power on reset) operations.
  • the activation signal output unit 217 operates with the output from the logic unit 213, and the activation signal is output to the lower main cell controller IC 301.
  • a capacitor is connected to the outside of the cell controller IC 301 in the start signal output unit 217.
  • This capacitor performs a charge pump operation and is for generating a voltage higher than the power supply Vcc of the main cell controller IC 301 by a set voltage.
  • the start signal (DC voltage) based on the potential higher by Vcc of the main cell controller IC can be transmitted to the next (lower) main cell controller IC 301.
  • the circuit performing this charge pump operation is also used commonly for the second data input / output unit 221 and the second clock input / output unit 221 described later, and the potential reference for these inputs / outputs is the lower main cell controller It is about the same as the potential reference of the IC.
  • the Vcc terminal is always connected to the start signal detection unit 216, and power is supplied only to the start signal detection unit 216 even when the entire operation of the main cell controller IC 301 is stopped. However, since the power is supplied from the battery (cell group 102) when the cell controller IC is in the operation stop state, the start signal detection unit 216 has a circuit configuration that reduces the current consumption as much as possible (details are omitted).
  • Communication between the microcomputer 504 and the main cell controller IC 301 and communication between the microcomputer 504 and the sub cell controller IC 302 are performed by bidirectional communication.
  • This bi-directional communication is performed, for example, in accordance with the specification of the I2C bus.
  • the clock signal for synchronization is transmitted from the clock signal output port SCLK of the microcomputer 504 to the top main cell controller IC 301a and the top sub cell controller IC 302a, and further, in the daisy chain type signal path, as described above. It is transmitted to the main cell controller IC 301 a and the sub cell controller IC 302 a.
  • each main cell controller IC 301 or each sub cell controller IC 302 the first clock input / output unit 219 receives this clock signal from the SCLK 1 terminal and sends it to the logic unit 213.
  • the logic unit 213 further transmits this clock signal from the second clock input / output unit 221 to the lower main cell controller IC 301 or sub cell controller IC 302 via the SCLK2 terminal. Since transmission of this clock signal is bi-directional communication, when transmitting a clock from the main cell controller IC 301 or the sub cell controller IC 302 to the microcomputer 504, clock transmission is performed in the reverse path.
  • command and data signals are also performed in two-way communication.
  • the command and data signals (data packets) transmitted from the microcomputer 504 are performed in the same manner as the transmission of the clock signal described above.
  • the first data input / output unit 218 receives a data packet via the SDAT1 terminal and sends it to the logic unit 213, and this data packet is further transmitted from the second data input / output unit via the SDAT2 terminal to the lower main cell controller IC 301 or It is transmitted to the subcell controller IC 302. Similar to clock transmission, when data is transmitted from the main cell controller IC 301 or the sub cell controller IC 302 to the microcomputer 504, data transmission is performed in the reverse path.
  • the main cell controller IC 301 measures the voltage between the terminals of each single battery cell based on the command and data signal transmitted from the microcomputer 504, and performs various diagnostics (overcharge, overdischarge, disconnection detection of voltage detection line, etc.) Is executed.
  • the state data of each single battery cell is transmitted from the main cell controller IC 301 to the upper main cell controller IC 301 via the first data input / output unit 218 and the SDAT1 terminal, and the upper main cell controller IC 301 performs SDAT 2
  • the second data input / output unit 220 receives this data via the terminal.
  • the state data of each single battery cell is finally transmitted from the top main cell controller IC 301 to the microcomputer 504.
  • a charge pump circuit (not shown) is incorporated in the second clock input / output unit and the second data input / output unit as in the case of the start signal output unit 216, and the main cell controller IC 301 and the lower main cell controller
  • the IC potential or the sub-cell controller IC 302 and the sub-cell controller IC 302 subordinate to this sub-cell controller IC 302 are aligned, and a low-frequency noise countermeasure capacitor is also inserted between the two cell controller ICs 301 and between the two sub cell controller ICs 302 Enables high quality signal transmission.
  • the subcell controller IC 302 performs balancing discharge of each single battery cell based on the command and data signal transmitted from the microcomputer 504, and during this balancing discharge, that is, with each balancing switch 222 turned on.
  • the terminal voltage of each balancing switch is measured.
  • the measurement data of the inter-terminal voltage of this balancing switch is transmitted from each sub cell controller IC 302 to the upper sub cell controller IC 302 via the first data input / output unit 218 and the SDAT1 terminal, and the upper sub cell controller IC 302
  • the second data input / output unit 220 receives this data through.
  • the measurement data of the terminal voltage of each balancing switch is finally transmitted from the top subcell controller IC 301 to the microcomputer 504.
  • the first clock input / output unit 219 and the second clock input / output unit 221 are respectively provided with a clock reception circuit and a clock transmission circuit (not shown), and transmission and reception of synchronization clocks are It is carried out by serial communication with one data communication line.
  • the first data input / output unit 218 and the second data input / output unit are provided with a data receiving circuit and a data transmitting circuit (not shown), respectively, and data transmission and reception are performed by one data communication line. It is done by serial communication.
  • the data format in this serial communication may conform to the specification of I2C communication as described above, for example, or may conform to the specification of other serial communication.
  • the main cell controller IC 301 shown on the upper side in the figure is the lower main cell controller IC 301
  • the main cell controller IC 301 shown on the lower side is the upper main cell controller IC 301
  • the sub cell controller IC 302 shown on the upper side in the figure is a lower sub cell controller IC 302
  • the sub cell controller IC 302 shown on the lower side is an upper sub cell controller IC 301.
  • commands and data from the microcomputer 504 are first transmitted to the main cell controller IC 301 or the sub cell controller IC 302 shown in the lower side of the figure.
  • the circuit configuration may be such that the main cell cell controller IC or subcell controller IC shown at the top in the figure first receives a command from the microcomputer 504, so the upper and lower parts of the main cell controller IC and subcell controller IC are illustrated. It is not limited to the Further, reference numerals 102a to 102d of the respective cell groups in FIG. 3 are also set according to the upper / lower relation of the main cell controller IC and the sub cell controller IC shown here, and the lowermost cell group in the figure is It is 102a. However, regarding the unit cell in each cell group, since the potential of the unit cell at the upper side of the drawing is high, the unit cell shown at the upper side in the drawing is the upper unit cell.
  • the positive and negative terminal potentials of the unit cells of the cell group 102 are input to the main cell controller IC 301 via the voltage detection lines SL1 to 13 and the CV terminals (CV1 to CV13 terminals) for voltage detection.
  • the multiplexer 210 sequentially selects the cells 1 to 12 of the potentials of two adjacent voltage detection lines, that is, the potentials of the positive and negative electrode terminals of one unit cell, and inputs them to the differential amplifier 211.
  • the differential amplifier 211 inputs the difference between the positive and negative electrode terminal potentials of the unit cell as the inter-terminal voltage of the unit cell to the AD converter 212.
  • the AD converter 212 converts the input terminal voltage of the single battery cell into a digital value, and inputs the digital value to the logic unit 213.
  • the logic unit 213 converts the measured terminal voltage (OCV) of the cells 1 to 12 into a digital value To the voltage measurement result register 244.
  • the terminal voltage (OCV) VC1 OCV to VC12 OCV of the unit cells of the cells 1 to 12 stored in the voltage measurement result register 244 is transmitted to the battery controller 500 via the above communication path.
  • the microcomputer 504 of the battery controller 500 receives the data of the open circuit voltages VC1 OCV to VC12 OCV between the terminals of the cells 1 to 12 of the cell group 102 described above, and the relationship between the OCV and the SOC already measured and converted into data (for example, The received OCV of each single battery cell is converted to SOC using the OCV-SOC conversion curve (7).
  • the SOCs of cells 1 to 12 are ranked in order of magnitude, and commands to perform balancing discharge of unit cells other than the unit cells with the smallest SOC, and the voltage between the terminals of the balancing switch performing this balancing discharge.
  • a command to measure VBS is sent to the subcell controller IC 302.
  • a command to measure the inter-terminal voltage VC BS of these single battery cells is sent to the main cell controller IC 301 Send.
  • the measurement of the short-time balancing discharge and the VBS in the sub-cell controller IC 302 and the measurement of the VC BS in the main cell controller IC 301 are performed almost simultaneously in one single battery cell. That is, these operations for each unit cell are executed substantially in synchronization between main cell controller IC 301 and sub cell controller IC 302.
  • the synchronization between the operation in the sub cell controller IC 302 and the operation in the main cell controller IC 301 is performed by managing the synchronization clock and the data packet transmitted from the microcomputer 504 to each other.
  • the balancing discharge of all the single battery cells is performed simultaneously.
  • a command to measure the inter-terminal voltage (VC BS ) of each single battery cell and the inter-terminal voltage (VBS) of each balancing switch may be transmitted to the main cell controller IC 301 and the sub cell controller IC 302. If discharge of the single battery cell is not in progress, overdischarge will not occur even if balancing discharge is performed for a short time. At the time of startup of the electric vehicle (at the time of key-on), almost such a state is established, so that at the time of key-on, short-time balancing discharge of all the single battery cells may be performed.
  • the measurement of the voltage between the terminals of the balancing switch in the subcell controller IC 302 and the measurement of the terminal of the single battery cell in the main cell controller described below are performed subsequent to the OCV measurement of the single battery cell described above. The measurement is possible even in a state where 800 is connected as a load, that is, during normal operation other than when the vehicle is started.
  • the sub cell controller IC 302 is connected to the unit cells of the cells 1 to 12 via the voltage detection lines SL1 to SL13, the balancing connection lines BL1 to BL13, and the balancing terminals (BS terminals) CBS1 to C13.
  • the subcell controller IC 302 receives a balancing discharge command from the battery controller 500 via the above communication path, it turns on the balancing switches (222) BS1 to 12 specified by the balancing discharge command, Perform balancing discharge of the corresponding single battery cell.
  • the multiplexer 210 selects the potential of the positive and negative terminals of the balancing switch that is on and inputs the selected potential to the differential amplifier 211.
  • the differential amplifier 211 inputs the difference between the positive and negative terminal potentials of the balancing switch into the AD converter 212 as the voltage (VBS) between the terminals of the balancing switch.
  • the AD converter 212 converts the input terminal voltage of this balancing switch into a digital value, and inputs it to the logic unit 213, and the logic unit 213 measures the measured terminal voltage (VBS) of the balancing switch with a digital value
  • the result is stored in the result register 244.
  • the terminal voltage (VBS) of the balancing switch stored in the voltage measurement result register 244 is transmitted to the battery controller 500 via the above communication path.
  • Main cell controller IC 301 receives a command for measuring the voltage between terminals (VC BS ) during the balancing discharge of the single battery cell from battery controller 500 substantially simultaneously with the command for the balancing discharge from battery controller 500 to sub cell controller IC 302 Do. Therefore, the data of this command includes command data such as balancing discharge by the sub cell controller IC 302 and command data synchronized with the main cell controller IC 301 (for example, bit data indicating whether or not to synchronize).
  • command data such as balancing discharge by the sub cell controller IC 302 and command data synchronized with the main cell controller IC 301 (for example, bit data indicating whether or not to synchronize).
  • the potential of the positive and negative terminals of the corresponding unit cell is selected by the multiplexer 210 of the main cell controller IC 301 and input to the differential amplifier 211.
  • the differential amplifier 211 inputs the difference between the positive and negative terminal potentials of the single battery cell to the AD converter 212 as the voltage (VC BS ) between the terminals of the single battery cell.
  • the AD converter 212 converts the input terminal voltage of this balancing switch into a digital value, and inputs it to the logic unit 213.
  • the logic unit 213 uses the measured terminal voltage (VC BS ) of the single battery cell as a digital value. It stores in the voltage measurement result register 244.
  • the measurement of the voltage between terminals of a single battery cell is performed in the state which the balancing switch 222 of main cell controller IC301 is OFF.
  • the terminal voltage VC BS of the balancing switch stored in the voltage measurement result register 244 is transmitted to the battery controller 500 via the above communication path.
  • CV terminals for voltage detection for measuring the inter-terminal voltage of single battery cells are provided in main cell controller IC 301, and BS terminals (CBS1 to 13) is provided in the subcell controller IC 302.
  • BS terminals CBS1 to 13
  • the balancing discharge current flows through the balancing resistor Rb 201 and the balancing switch 222, and not through the cell voltage input resistor Rcv 202, so the balancing discharge is performed through the CV terminal It does not affect the measurement of the voltage between the terminals of the unit cell input to the controller IC 301.
  • VC BS is simply described as VC.
  • the measurement of the voltage between the terminals of the balancing discharge and balancing switch in the subcell controller IC 302 and the measurement of the voltage between the terminals of single battery cells in the main cell controller IC 301 are performed in synchronization for each single battery cell. At that time, the measurement of the discharge and voltage between terminals of other unit cells and the measurement of voltage between terminals of other balancing switches are not performed.
  • the battery controller 500 uses the terminal voltage (VBS) of the balancing switch and the terminal voltage VC of the unit cell, HEV, PHEV, EV , Etc., that is, even when the storage device 100 and the inverter 800 are connected, the state in which the balancing switches are turned on and the balancing discharge of the plurality of single battery cells is being performed. Then, the voltage between terminals of each unit cell or the voltage between terminals of each balancing switch can be measured, and the balancing discharge current Ib of each unit cell can be obtained each time.
  • VBS terminal voltage
  • HEV, PHEV, EV , Etc. the state in which the balancing switches are turned on and the balancing discharge of the plurality of single battery cells is being performed.
  • VBS VC * R BS / (2 * Rb + R BS ). . . (1)
  • Rb is a known balancing resistor 201 (see FIG. 3), and its resistance value is also indicated by Rb.
  • R BS is the on resistance value of the balancing switch 222.
  • the resistance value R BS can be obtained by the following equation (2) which is a modification of the above equation (1).
  • R BS 2 * Rb * VBS / (VC-VBS). . . (2)
  • Ib VBS / R BS
  • Ib (VC ⁇ VBS) / (2 * Rb). . . (3)
  • the resistance value Rb of the balancing resistor 201 may use the actually measured resistance value. Further, the temperature change of the resistance value Rb of the balancing resistor 201 can be corrected to obtain the balancing discharge current more accurately.
  • a temperature sensor (not shown) is provided in the vicinity of the balancing resistor, and an output from this sensor is transmitted from, for example, a temperature detection circuit (not shown) of the subcell controller IC 302 to the battery controller 500.
  • the value Rb it is possible to calculate the balancing current in the case of performing balancing discharge when the vehicle is started.
  • the voltage between terminals of each single battery cell in the case of performing balancing discharge in a state where a load such as inverter 800 is not connected to power storage device 100 It becomes what deducted the voltage drop by internal resistance of each single battery cell from OCV of a cell.
  • the voltage (VC) between the terminals of each single battery cell also fluctuates in response to the fluctuation of the load. Further, noise is also mixed in the voltage (VC) between the terminals at this time.
  • the temperature of the power storage device also differs between the time of startup of the vehicle and the time of normal operation.
  • the balancing discharge current Ib and the voltage VC between the terminals of the unit cell when the circuit such as each unit cell and the battery monitoring device at the start of the vehicle is at a constant temperature.
  • Ib (R) (VC (R) -VBS (R)) / (2 * Rb (R)). . . (5)
  • Ib (R) VC (R) / (2 * Rb (R) + R BS (R)). . . (6)
  • inverter 800 is connected to power storage device 100, and balancing current Ib in a state where the vehicle is in normal operation, voltage VC between terminals of single battery cell, voltage VBS between balancing switches, balancing resistance Rb, balancing
  • the on resistance R BS of each switch is denoted by (N) and expressed as follows.
  • Ib (N) (VC (N) -VBS (N)) / (2 * Rb (N)). . . (7)
  • Ib (N) VC (N) / (2 * Rb (N) + R BS (N)). . .
  • F2 (2 * Rb (R) + RBS (R)) / (2 * Rb (N) + RBS (N)). . . (12) It is expressed as Although it is possible to calculate the coefficients F1 and F2 using a table in advance based on the temperature characteristics of the balancing resistor 201 and the balancing switch 222, it is possible to accurately measure the temperature inside the cell controller IC. It is necessary, and data and calculation for temperature correction are needed.
  • Equation (14) indicates that the balancing current can be calculated using a known balancing resistance value by measuring the voltage between terminals of the unit cell (VC) and the voltage between terminals of the balancing switch (VBS).
  • VC unit cell
  • VBS voltage between terminals of the balancing switch
  • Equation (12) it is necessary to always consider the temperature change of the on resistance of the balancing switch 222.
  • a MOSFET is used for the balancing switch 222 and generally has positive temperature characteristics.
  • the balancing switch 222 when the balancing switch 222 is on, the voltage between the terminals of the single battery cell and the voltage between the terminals of the balancing switch 222 corresponding to the single battery cell are measured. It becomes possible to calculate the balancing current which does not require temperature change correction of the on-resistance. Therefore, by measuring the inter-terminal voltage VC of the unit cell and the inter-terminal voltage VBS of the balancing switch 222 in real time, it is possible to calculate this balancing current also in real time.
  • the inter-terminal voltage VC of the single battery cell and the inter-terminal voltage (VBS) of the balancing switch 222 are measured at different timings, respectively, in equation (5), (7) or (14)
  • the current I BS can not be calculated correctly. If a balancing current with an error is used, the SOC of a single battery cell can not be calculated correctly (see the description below). Such a calculation error of the SOC is integrated, which may cause an overdischarge and the like in some cases.
  • the initial SOC is first determined based on the OCV-SOC conversion curve of FIG. 7 using the OCV measured at startup of the electric vehicle such as HEV, PHEV, EV.
  • the case of one single battery cell will be described as an example.
  • the initial value of SOC of the unit cell is set to SOC0.
  • SOC SOC0- ⁇ I (t) dt- -Ib (t) dt. . .
  • ⁇ I indicates the integrated value of the charge / discharge current I (t)
  • ⁇ Ib indicates the integrated value of the balancing discharge current Ib (t).
  • T shows that it is changing with time. Since I (t) is a charge and discharge current, when the battery system is charged, I (t) is a negative value and SOC increases. As described above, the balancing discharge current fluctuates somewhat in response to the change in the voltage between the terminals of each unit cell. In addition, the balancing discharge is performed on a single battery cell in which the SOC of all the single battery cells is obtained, and the variation of SOC ⁇ SOC (> 0) is larger than a predetermined threshold ⁇ SOCth (> 0). The SOC of each single battery cell is managed by the battery controller 500 and the cell controller 200.
  • the balancing resistance tends to be used with a small value. If the balancing current is not calculated in consideration of the on resistance of the balancing switch, an excessive balancing current may flow in some cases, resulting in an overdischarged state.
  • the average value of the inter-terminal closed circuit voltage (CCV) at the time of load connection changes in the same manner as the OCV-SOC curve of FIG. 7 corresponding to the SOC.
  • the exact SOC of the unit cell is determined, for example, in the steep portion (A in the figure) of the slope of the OCV-SOC conversion curve of FIG. However, in the portion where the slope of this curve is gentle (B in the figure), it is not possible to obtain the accurate SOC from the OCV.
  • the two curves C and D shown at the bottom of FIG. 7 show the conversion errors of SOC when the measurement error of OCV is 15 mV and 10 mV, respectively. That is, an accurate SOC can not be calculated in the portion B of the OCV-SOC conversion curve.
  • ⁇ SOC ⁇ Ib ⁇ t of equation (18) was calculated using variation ⁇ SOC of SOC calculated in part A. However, since Ib can not be accurately determined, there is a possibility that overdischarge may occur.
  • balancing discharge is performed little by little every constant time as described in Japanese Patent Laid-Open No. 2001-309750, and all single cells are There has been a method of converging the variation of the battery cells.
  • the balancing switch 222 When the balancing switch 222 is turned on, the current flowing through the balancing discharge circuit is controlled using the balancing discharge circuit of the conventional battery monitoring apparatus (see, for example, FIG. 18 and FIG. 19 of JP 2010-228523 A). Between the terminals of the unit cell when the unit cell is off and the terminals of the unit cell when the balancing switch is on (in this case, corresponding to the sum of the balancing resistance and the on resistance of the balancing switch). From the divided voltage), the balancing current can be calculated in the same manner as described above. In this case, although the calculation formula is slightly different from the above formulas (1) to (14), the description will be omitted.
  • the voltage between the terminals of the single battery cell and the voltage between the terminals when the balancing switch 222 corresponding to the single battery cell is on are separately measured. These can not be measured simultaneously. Therefore, the balancing current is not correctly calculated, and the SOC is not correctly calculated. Furthermore, conventionally, since the capacity of the unit cell was small, the balancing discharge current was not large, and the on resistance of the balancing switch, which has a smaller resistance value than the cell voltage input resistance and the balancing resistance, was not considered.
  • FIG. 8 is an outline of the flow of the calculation of the balancing discharge current of each single battery cell and the control of the balancing discharge in an embodiment of a power storage device equipped with a battery control device including the battery monitoring device according to the present invention described above. Is shown.
  • the central part of FIG. 8 describes the processing by the microcomputer 504.
  • the battery controller 500 also includes circuits (not shown) other than the microcomputer, and the battery control device 600 also includes circuits (not shown) other than the battery controller 500 and the cell controller 200. Therefore, the battery control device actually performs many other operations besides being included in this flow.
  • the flow shown in FIG. 8 is obtained by extracting only the part related to the present invention and collectively.
  • diagnosis of the internal circuit operation of each single battery cell and the cell controller IC itself, disconnection diagnosis of the voltage detection line, and the like are not included in this flow.
  • OCV measurement and CCV measurement of each single battery cell contained in this flow are used besides the balancing discharge current calculation demonstrated above, description is abbreviate
  • the relay 700 and the relay 710 are off when the vehicle such as a hybrid vehicle starts, and the relay 700 and the relay 710 are off when starting the cell controller and performing various measurement and diagnostic operations including OCV measurement. Done in the state. In the middle of the flow shown in FIG. 8, relay 700 and relay 710 are turned on, power storage device 100 and inverter 800 are connected, and DC power of battery system 100 is converted into three-phase AC power by inverter 800 to obtain motor 900. And the vehicle is driven.
  • step S1 balancing discharge current calculation and balancing discharge control by the battery control device according to the present invention The operation is started.
  • step S2 the microcomputer 504 generates a command to measure the OCV (open circuit voltage) of all the single battery cells of the battery system 104.
  • OCV open circuit voltage
  • the battery system 104 is not connected to the inverter 800 which is a load, that is, the relay 700 and the relay 710 (see FIGS. 1 and 2) are turned off
  • the main cell controller IC 301 and the balancing switch 222 of the sub cell controller IC 302 are both turned off.
  • the command to turn off each balancing switch is a command different from the command to measure the voltage between terminals of each unit cell, but in the measurement of OCV, the balancing switch is always performed in the off state. That is, since the OCV measurement command and the balancing switch off command are always generated together, they are shown in a simplified manner in FIG.
  • the OCV measurement command from the microcomputer is transmitted to the main cell controller IC 301 and the sub cell controller IC 302 through the above communication path, and the main cell controller IC 301 and the sub cell controller IC 302 synchronously perform the following processing.
  • Main cell controller IC301 ⁇ All balancing switch off (step S2M1) ⁇ Voltage measurement between each battery cell terminal (Step S2M2) (Sub-cell controller IC 302) ⁇ All balancing switch off (step S2S)
  • all the balancing switches 222 are normally started in OFF state at the time of starting of a vehicle, operation
  • movement of step S2 M1 and step S2 S is omissible.
  • the balancing switch 222 of the main cell controller IC 301 is always in the off state in the operation of the battery control device described here.
  • step S2M1 these balancing switches are turned off and indicated only once.
  • many operations other than those shown in FIG. 8 are executed.
  • step S2M2 measurement data of the voltage (in this case, OCV) between the terminals of each single battery cell measured by the main cell controller IC 301 is transmitted to the microcomputer 504 via the communication path as described above, and in step S3.
  • the SOC of each unit cell is calculated. Although the calculation of the SOC is obtained using the relationship of OCV-SOC as shown in FIG. 7, it is desirable to use the portion A of the OCV-SOC conversion curve as described above.
  • step S4 the deviation ⁇ SOC of SOC is calculated for each single battery cell from the SOC of each single battery cell calculated in step S3. At this time, the order of the magnitude of the SOC is also calculated.
  • the balancing discharge is usually performed from a large SOC, but this description will be omitted below.
  • step S5 it is determined whether there is a single battery cell to be subjected to balancing discharge.
  • the balancing discharge is performed for the one where the deviation ⁇ SOC of the SOC is larger than a predetermined threshold value ⁇ SOCth. If there is no single battery cell having an SOC with a deviation larger than ⁇ SOCth, the process ends in step S18.
  • step S6 If there is a single battery cell to be subjected to balancing discharge, a list of single battery cells to be subjected to balancing is created in step S6. Furthermore, in step S7, the target total balancing discharge current amount ( ⁇ Ib (t) dt in equations (14) to (16), or Ib ⁇ t in equation (17)) of the unit cells targeted for balancing discharge is It is calculated. For example, in the case of setting the target total balancing discharge current amount using equation (15), the deviation ⁇ SOC of the SOC becomes the target total balancing discharge current amount. Alternatively, for example, ⁇ SOC ⁇ SOCth may be set as the target total balancing discharge current amount. Various settings of ⁇ SOCth and the target total balancing discharge current amount can be made, and the description thereof is omitted here.
  • the balancing discharge command of the balancing discharge target unit cell at step S8 and the CCV measurement command of the balancing discharge target unit cell at step S9 are generated almost simultaneously.
  • the first balancing discharge performed with these commands is to measure the voltage across the terminals of each unit cell or the voltage across the balancing switch 222. Is done.
  • step S8S Based on the balancing discharge command in step S8, the balancing switch is turned on for a predetermined short time by the subcell controller IC 302, and balancing discharge is performed (step S8S).
  • step S9S the voltage between the terminals of the balancing switch 222 in the on state is measured. Therefore, the measurement of the voltage across terminals of the balancing switch 222 and the operation of turning on the balancing switch 222 are performed synchronously.
  • a command for the operation of the balancing discharge (step S8S) to the subcell controller IC 302 and the measurement of the voltage between the terminals of the balancing switch 222 (step S9S) may be transmitted in one data packet.
  • step S9M the voltage measurement between the terminals of the unit cell is performed in step S9M.
  • steps S8S, S9S, and S9M are performed in synchronization with each single battery cell to be subjected to balancing discharge.
  • step S9M Measurement data of terminal voltage measurement (step S9M) of balancing discharge target single battery cell by main cell controller IC 301 and measurement data of balancing switch terminal voltage measurement (step S9S) by subcell controller IC 302 It is transmitted to the microcomputer 504 via In step S10, as described above, the balancing discharge current Ib is calculated for each balancing discharge target unit cell by the equation (3).
  • step S11 a balancing discharge schedule of the unit cells for balancing discharge is set.
  • Initial value Ib0 of balancing discharge current Ib calculated in step S10 is calculated.
  • the terminal voltage of the single battery cell fluctuates with the fluctuation of the load of inverter 800. Also, as the battery system charges and discharges, the average inter-terminal voltage also fluctuates with time. Therefore, the discharge time calculated by equation (19) is used as a guide only, and the actual balancing discharge is controlled in smaller time steps.
  • resistance value Rb of balancing resistor 201 is set in consideration of ⁇ SOCth, the on resistance of the balancing switch and the variation thereof to such a value that the variation of SOC is eliminated when the balancing discharge is continuously performed for several hours or more. Ru. Moreover, in the battery system consisting of a plurality of single battery cells, the short-term change of the output voltage due to the inverter load is about 20% at pp, and the voltage change of the amplitude of pp is several tens of millimeters even if it is particularly fast It is more than a second.
  • the specific control of the on time of the balancing switch, and the measurement interval of the voltage between terminals of the single battery cell and the voltage between terminals of the balancing switch depend on the specifications of the single battery cell and the battery system, and further the specifications of the load Description is omitted.
  • a fine time interval The on / off control may be performed in The measurement of the voltage between the terminals of each single battery cell and the voltage between the terminals of the balancing switch can be finely performed in real time in the control cycle of a microcomputer, and the SOC of each single battery cell is also accurately calculated in real time.
  • the on / off of the balancing switch may be controlled while referring to the SOC calculation result in real time.
  • the schedule is set so that the balancing discharge of two adjacent single battery cells, that is, two adjacent balancing switches are not simultaneously turned on.
  • the balancing discharge is performed with the voltage of two single battery cells, so the heat generation amount at the balancing switches increases. It is from. Therefore, if two adjacent balancing switches are not turned on, the balancing discharge may be performed with the plurality of balancing switches simultaneously turned on.
  • step S12 a balancing discharge command of the unit cell targeted for balancing discharge is generated. Based on this command, the sub-cell controller 302 starts balancing discharge of the unit battery cells to be balanced discharge (step S12S).
  • the microcomputer 504 in the state where the balancing discharge is being performed, the microcomputer 504 generates a command to perform the CCV measurement of the single battery cell performing the balancing discharge in step S13. Based on this CCV measurement command, measurement of the voltage between the terminals of the single battery cell performing balancing discharge (step S13M) is performed by the main cell controller IC301. Further, in synchronization with this, the inter-cell voltage of the balancing switch 222 in the on state is measured by the sub cell controller IC 302 (step S13S).
  • the measurement of the voltage between the terminals of the single battery cell and the measurement of the voltage between the terminals of the balancing switch 222 should be performed in the smallest possible steps. desirable. For example, it is desirable to perform in real time every control cycle of the microcomputer 504. However, depending on the driving state of the vehicle, in the case where the variation in the terminal voltage of the single battery cell is gentle, it may be performed at a long time interval.
  • the charging / discharging current of a battery system is also integrated. The charge / discharge current of this battery system is detected by the current sensor 503 and the charge / discharge current detection circuit shown in FIGS.
  • the charge and discharge current is detected in real time in each control cycle of the microcomputer 504.
  • the calculation of the SOC value obtained by integrating this charge / discharge current, and the battery control based on this SOC value I omit it.
  • the balancing discharge may be continuously turning on the balancing switch.
  • the CCV of the single battery cell is determined in step S13. This is because the operations of step S13M and step S13S are performed synchronously only when the measurement command is generated.
  • step S13M Measurement data of voltage measurement (step S13M) between terminals of balancing discharge target single battery cell by main cell controller IC 301 and measurement data of voltage measurement between balancing switch terminals (substep S13S) by subcell controller IC 302 It is transmitted to the microcomputer 504 via In step S14, as described above in step S10, balancing discharge current Ib is calculated for each balancing discharge target single battery cell by equation (3), and this balancing discharge current is integrated to obtain total balancing discharge current.
  • step S15 the balancing discharge time is calculated based on the difference between the calculated total balancing discharge current and .DELTA.SOC, and the balancing discharge current Ib, and the time for turning on the balancing switch is recalculated to be the balancing discharge target. Reconfigure the balancing discharge schedule for single battery cells. Further, since the balancing discharge is finished for the unit cell in which the total balancing discharge current has become equal to or larger than ⁇ SOC, a command to turn off the balancing switch 222 of this unit cell is sent to the subcell controller IC 302. Based on this command, in step S15S, the subcell controller IC 302 turns off the balancing switch 222 to stop the balancing discharge.
  • step S16 it is confirmed in step S15 whether the single battery cell to be subjected to the balancing discharge still remains or not. If there is no single battery cell to be subjected to the balancing discharge, the process proceeds to step S18, and the balancing discharge is completed. Moreover, if single battery cells to be subjected to the balancing discharge remain, the balancing discharge of the single battery cells to be subjected to the balancing discharge is continued.
  • step S17 if there is a change (decrease) in the single battery cells to be balanced, the list of single battery cells to be balanced discharge is changed in consideration of this, and based on this list, the operations from step S13 are performed. repeat.
  • OCV measurement (steps S 2, S 2 S, S 2 M 1, S 2 M 2) of each single battery cell is performed in a state where a load such as an inverter is not connected to the battery system 104. That is, for example, it is desirable to carry out at the time of starting of the electric vehicle. Steps after step S3 can be performed in a state where a load such as an inverter is connected to the battery system 104.
  • the rough balancing discharge time is calculated (step S11), so this first CCV measurement is For example, it is desirable to be performed in a state where the vehicle is stable to some extent, for example, at the time of startup of the electric vehicle.
  • the battery system 104 is described as being configured by connecting the cell groups 102 in series.
  • the battery system 104 may be configured by connecting a plurality of cell groups in series / parallel or in parallel.
  • main cell controller IC 301 and sub cell controller IC 302 are described to be provided in a one-to-one relationship with cell group 102, but it is also possible to control a plurality of cell groups by one cell controller IC pair 300 It is also possible to control one cell group with a plurality of cell controller IC pairs 300.
  • the number of unit cells constituting a cell group can be variously modified according to the specifications of a battery module including a plurality of cell groups or a battery system. Further, the specifications of such various battery systems are set in accordance with the power specifications required for electric vehicles such as HEVs, PHEVs, EVs and the like on which this battery system is mounted.
  • the configuration and the function of the cell controller 200 described above are also applicable to battery systems of such various configurations.
  • the battery control device according to the present invention can be applied to battery systems of various configurations and to electrically powered vehicles of various specifications.
  • main cell controller IC 301 and the sub cell controller IC 302 are described as being cell controllers of the same specification in the above description, the main cell controller IC 301 and the sub cell controller IC 302 may be any as long as they can execute the operations described above. It does not have to be the same specification.
  • the balancing switch of the main cell controller IC 301 is used in the off state except for use in the diagnostic operation. Further, this diagnostic operation can also be performed by the balancing switch of the subcell controller IC 302. Therefore, in performing the operation of the battery control device described above, the balancing switch of the main cell controller IC 301 may not be provided. However, since performing diagnostic operations reliably has important significance in vehicle safety confirmation, maintaining the same function in both main cell controller IC 301 and subcell controller IC 302 improves vehicle safety. it can.
  • the command and data signals and the clock signal are both between the main cell controller IC 301 and the sub cell controller IC 302, and further between the battery controller 500 and the uppermost main cell controller IC and the uppermost sub cell controller.
  • the communication is performed in the direction-to-point communication, it is apparent that the communication can also be performed in one-way communication as disclosed in JP-A-2010-228523.

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

Abstract

La présente invention concerne un dispositif de surveillance d'éléments pour commander un groupe d'éléments dans lequel une pluralité d'unités d'élément individuelles sont connectées en série, et la présente invention comprend : une première unité pour mesurer la tension aux bornes des unités d'élément individuelles ; une seconde unité pour réaliser une décharge d'équilibrage des unités d'élément individuelles ; et une pluralité de lignes de détection de tension pour mesurer la tension aux bornes des unités d'élément individuelles, les lignes de détection de tension étant connectées à la première unité et aux électrodes positives et aux électrodes négatives des unités d'élément individuelles ; une première résistance qui est disposée pour chacune des lignes de détection de tension ; des lignes d'équilibrage se ramifiant à partir des lignes de détection de tension, qui sont connectées à la seconde unité à un point plus éloigné en direction des unités d'élément individuelles que les premières résistances ; des secondes résistances qui sont disposées sur les lignes d'équilibrage ; et la seconde unité qui comporte des commutateurs d'équilibrage pour réaliser une décharge d'équilibrage des unités d'élément individuelles, les commutateurs d'équilibrage étant disposés par chaque unité d'élément individuelle et connectés entre les lignes d'équilibrage connectées aux électrodes négatives et les lignes d'éclairage connectées aux électrodes positives des unités d'élément individuelles.
PCT/JP2011/068690 2011-08-18 2011-08-18 Dispositif de surveillance d'éléments et dispositif de commande d'éléments équipé de celui-ci WO2013024541A1 (fr)

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PCT/JP2011/068690 WO2013024541A1 (fr) 2011-08-18 2011-08-18 Dispositif de surveillance d'éléments et dispositif de commande d'éléments équipé de celui-ci

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JP2015201939A (ja) * 2014-04-07 2015-11-12 株式会社デンソー 均等化放電装置
JP2016011807A (ja) * 2014-06-30 2016-01-21 アイシン精機株式会社 燃焼装置および燃料電池システム
CN105610209A (zh) * 2015-10-21 2016-05-25 金龙联合汽车工业（苏州）有限公司 一种电池组的被动均衡方法
JP2016096694A (ja) * 2014-11-17 2016-05-26 株式会社東芝 電池監視方法および電池監視装置
JP2017133264A (ja) * 2016-01-29 2017-08-03 日立建機株式会社 ハイブリッド式建設機械
WO2017185671A1 (fr) * 2016-04-29 2017-11-02 华为技术有限公司 Circuit de collecte de tension et procédé de commande de circuit
JP6242516B1 (ja) * 2017-02-01 2017-12-06 三菱電機株式会社 バッテリーマネジメント装置
JP2019012080A (ja) * 2018-09-19 2019-01-24 日立オートモティブシステムズ株式会社 電池システム
JP2019033653A (ja) * 2017-08-10 2019-02-28 田淵電機株式会社 蓄電装置
KR102474573B1 (ko) * 2021-11-19 2022-12-06 주식회사 오토실리콘 싱글-셀 배터리 모니터링 회로, 싱글-셀 배터리 모니터링 반도체 집적회로 및 이를 구비한 배터리 유닛, 배터리 모듈 및 배터리 팩

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Publication number Priority date Publication date Assignee Title
JP2015201939A (ja) * 2014-04-07 2015-11-12 株式会社デンソー 均等化放電装置
JP2016011807A (ja) * 2014-06-30 2016-01-21 アイシン精機株式会社 燃焼装置および燃料電池システム
JP2016096694A (ja) * 2014-11-17 2016-05-26 株式会社東芝 電池監視方法および電池監視装置
CN105610209A (zh) * 2015-10-21 2016-05-25 金龙联合汽车工业（苏州）有限公司 一种电池组的被动均衡方法
JP2017133264A (ja) * 2016-01-29 2017-08-03 日立建機株式会社 ハイブリッド式建設機械
WO2017185671A1 (fr) * 2016-04-29 2017-11-02 华为技术有限公司 Circuit de collecte de tension et procédé de commande de circuit
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JP6242516B1 (ja) * 2017-02-01 2017-12-06 三菱電機株式会社 バッテリーマネジメント装置
JP2018125970A (ja) * 2017-02-01 2018-08-09 三菱電機株式会社 バッテリーマネジメント装置
JP2019033653A (ja) * 2017-08-10 2019-02-28 田淵電機株式会社 蓄電装置
JP2019012080A (ja) * 2018-09-19 2019-01-24 日立オートモティブシステムズ株式会社 電池システム
KR102474573B1 (ko) * 2021-11-19 2022-12-06 주식회사 오토실리콘 싱글-셀 배터리 모니터링 회로, 싱글-셀 배터리 모니터링 반도체 집적회로 및 이를 구비한 배터리 유닛, 배터리 모듈 및 배터리 팩

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