WO2017208999A1 - 車載電池ユニット - Google Patents

車載電池ユニット Download PDF

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Publication number
WO2017208999A1
WO2017208999A1 PCT/JP2017/019728 JP2017019728W WO2017208999A1 WO 2017208999 A1 WO2017208999 A1 WO 2017208999A1 JP 2017019728 W JP2017019728 W JP 2017019728W WO 2017208999 A1 WO2017208999 A1 WO 2017208999A1
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WO
WIPO (PCT)
Prior art keywords
storage battery
unit
terminal
external charging
charging terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2017/019728
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English (en)
French (fr)
Japanese (ja)
Inventor
片山　直樹
阿部　邦宏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
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Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Publication of WO2017208999A1 publication Critical patent/WO2017208999A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • This disclosure relates to a battery unit mounted on a vehicle.
  • an in-vehicle power supply system including an internal storage battery such as a lithium ion storage battery constituting a battery unit and an external storage battery such as a lead storage battery provided outside the battery unit is known.
  • the internal storage battery is connected to the external storage battery via a connection path and a power supply terminal constituting the battery unit.
  • a semiconductor switch is provided in the connection path.
  • the external storage battery can be removed from the vehicle and replaced with a new external storage battery, or can be charged by jumping a rescue vehicle, for example.
  • the internal storage battery is mounted on the vehicle as a battery unit that is an ASSY configured with peripheral circuits. For this reason, when an internal storage battery was in an overdischarged state, there was no method for charging the internal storage battery from the outside, and the battery unit had to be removed from the vehicle and replaced.
  • This disclosure mainly aims to provide a battery unit that can eliminate the overdischarge state of the internal storage battery without replacing the battery unit.
  • a first disclosure is an in-vehicle battery unit including an internal storage battery having a plurality of single batteries, and is connected to the internal storage battery via a connection path and connected to an external storage battery outside the battery unit.
  • a terminal a switching unit that is provided in the connection path and switches between electrical continuity and cutoff by being in either a closed state or an open state, and is connected to the internal storage battery side than the switching unit in the connection path.
  • An external charging terminal is an in-vehicle battery unit including an internal storage battery having a plurality of single batteries, and is connected to the internal storage battery via a connection path and connected to an external storage battery outside the battery unit.
  • a terminal a switching unit that is provided in the connection path and switches between electrical continuity and cutoff by being in either a closed state or an open state, and is connected to the internal storage battery side than the switching unit in the connection path.
  • An external charging terminal is provided in the connection path and switches between electrical continuity and cutoff by being in either a closed state or an open state
  • the power supply terminal connected to the external storage battery and the internal storage battery are connected via the connection path.
  • a switching unit is provided in the connection path. By switching the switching unit between the closed state and the open state, the charging status of the external storage battery and the internal storage battery can be controlled. Specifically, for example, by switching the switching unit to the closed state, one of the external and internal storage batteries can be charged from the other storage battery.
  • the switching unit is switched to the closed state, an overcurrent may flow from the external storage battery to the internal storage battery via the power supply terminal and the connection path. For this reason, before switching a switching part to a closed state, it is requested
  • the external charging terminal is connected to the internal storage battery side of the switch part in the connection path.
  • the internal storage battery can be connected to the external charging terminal even if the switching unit is in an open state in order to prevent an overcurrent from flowing from the external storage battery to the overdischarged internal storage battery. Therefore, the internal storage battery can be charged by connecting an external charger provided outside the battery unit to the external charging terminal. Thereby, the overdischarge state of the internal storage battery can be eliminated without removing and replacing the battery unit.
  • each unit cell constituting the internal storage battery can be assembled without being charged, and each unit cell can be charged after the assembly is completed. Therefore, it is possible to prevent the overcurrent from flowing due to short-circuiting between the cells when the battery unit is assembled.
  • connection destination of the positive electrode terminal of the internal storage battery is provided in a first connection point closer to the internal storage battery than the switching unit in the connection path, and a charging path connected to the external charging terminal.
  • a changeover switch portion that selectively connects to any one of the second connection points, and the changeover switch portion connects the positive terminal of the internal storage battery and the first connection point when energized. When the energization is stopped, the positive electrode terminal of the internal storage battery and the second connection point are connected.
  • the external charging terminal is provided in the battery unit in order to eliminate the overdischarge state of the internal storage battery
  • the external charging terminal and the internal are connected due to, for example, the ground fault of the electrical path connecting the external charging terminal and the positive terminal of the internal storage battery
  • a new closed circuit containing the storage battery can be formed unintentionally.
  • the positive terminal and the negative terminal of the internal storage battery may be short-circuited, and an overcurrent may flow through the closed circuit.
  • the above disclosure selectively connects the connection destination of the positive terminal of the internal storage battery to either the first connection point on the internal storage battery side with respect to the switching unit in the connection path or the second connection point provided in the charging path.
  • the changeover switch section is provided.
  • the changeover switch unit is connected to the positive terminal of the internal storage battery and the first connection point by being energized, and is stopped from being connected to the positive terminal of the internal storage battery and the second connection point. Connect.
  • the changeover switch unit In a situation where the internal storage battery is in an overdischarged state and the internal storage battery needs to be charged from an external charger using the external charging terminal, there is a high possibility that there is no power supply source for driving the changeover switch unit. For this reason, in a situation where the internal storage battery is in an overdischarged state, there is no guarantee that the changeover switch unit can be controlled to open and close.
  • the change-over switch unit is configured to connect the positive terminal of the internal storage battery and the second connection point by stopping energization. Therefore, even when it is a case where opening / closing control of a changeover switch part cannot be performed in the situation where it is necessary to charge from an external charge terminal to an internal storage battery, an internal storage battery can be charged via a changeover switch part from an external charge terminal. .
  • the third disclosure includes a control circuit capable of performing opening / closing control of the changeover switch unit by supplying power, and the control circuit is supplied with power from the external storage battery.
  • the control circuit performs opening / closing control of the changeover switch unit by supplying power to the control circuit from the external storage battery.
  • the external storage battery may be overdischarged or the external storage battery may be removed from the vehicle. In this case, power cannot be supplied from the external storage battery to the control circuit, and opening / closing control of the changeover switch unit cannot be performed by the control circuit.
  • the changeover switch unit is configured to connect the positive terminal of the internal storage battery and the second connection point by stopping energization. For this reason, even if opening / closing control of the changeover switch unit cannot be performed by the control circuit, the positive terminal of the internal storage battery is connected to the external charging terminal via the charging path. Thereby, it can charge to an internal storage battery from an external charge terminal.
  • the fourth disclosure is provided in a charging path capable of connecting the external charging terminal and the positive electrode terminal of the internal storage battery, and allows a current flow in a specified direction from the external charging terminal to the positive electrode terminal, A rectifying unit is provided for preventing current flow in the direction opposite to the specified direction.
  • the rectification unit is provided in the charging path, it is possible to prevent an overcurrent from flowing in the closed circuit even when a closed circuit including the external charging terminal and the internal storage battery is formed unintentionally.
  • the rectifying unit for example, a diode can be used as in the fifth disclosure. Thereby, it is possible to prevent an overcurrent from flowing in the closed circuit without operating the rectifying unit from the outside.
  • the sixth disclosure includes a limiting unit that is provided in a charging path that can connect the external charging terminal and the positive electrode terminal of the internal storage battery, and that limits an amount of current passing through the external charging terminal.
  • the limiting unit is configured to be capable of adjusting an amount of current passing through the external charging terminal, and is connected to the external charging terminal via a power supply path and is supplied with power.
  • a control circuit capable of controlling the amount of current passing through the external charging terminal by operating the unit.
  • the control circuit is connected to the external charging terminal via the power feeding path. For this reason, when it is necessary to connect the external charger to the external charging terminal and charge the internal storage battery, even if the power supply from the in-vehicle power supply system to the control circuit is cut off, the external charging terminal is supplied. With the electric power, the limiting unit can be operated by the control circuit. Thereby, control of the electric current amount which passes an external charging terminal can be implemented, and charge control of an internal storage battery can be implemented appropriately.
  • An eighth disclosure includes a control circuit that is connected to the external charging terminal via a power supply path and is operable by being supplied with power, and the control circuit is configured to charge the internal storage battery via the external charging terminal.
  • a completion determination unit that determines whether or not the charging is completed, and a completion notification unit that performs a process of notifying that the charging is completed when the completion determination unit determines that the charging is completed.
  • the control circuit can be operated by the power supplied from the external charging terminal. For this reason, after connecting an external charger to the external charging terminal and starting charging the internal storage battery, the user can grasp the completion of charging when the charging is completed.
  • a ninth disclosure is a state determination unit that determines whether or not the internal storage battery is in an overdischarge state, and an overdischarge that notifies the fact when the state determination unit determines that the internal storage battery is in an overdischarge state.
  • a notification unit is a state determination unit that determines whether or not the internal storage battery is in an overdischarge state, and an overdischarge that notifies the fact when the state determination unit determines that the internal storage battery is in an overdischarge state.
  • the user can properly grasp that the internal storage battery is in an overdischarged state.
  • the external charging terminal has a stud shape.
  • connection portion with the external charging terminal in the external charger has a clip shape
  • the external charging terminal and the external charger can be connected by sandwiching the external charging terminal with the clip.
  • the external charging terminal is a connector through which a power supply connector of an external charger can be inserted and removed.
  • the power feeding connector when a power feeding connector is used as a connection portion with an external charging terminal in an external charger, the power feeding connector can be easily inserted into and removed from the external charging terminal. Thereby, the charging operation of the internal storage battery at the time of manufacture can be easily performed, and the workability at the time of manufacturing the battery unit 10 can be enhanced.
  • the external charging terminal is one of a plurality of terminals provided in the same connector.
  • the external charging terminal is drawn out of the battery unit from the internal storage battery via an electric wire.
  • the configuration can be simplified and the cost can be reduced as compared with the case where, for example, a connector is used as the external charging terminal.
  • the fourteenth disclosure includes a cover portion that has electrical insulation and is provided so as to cover the external charging terminal.
  • FIG. 1 is a perspective view showing the overall configuration of the battery unit according to the first embodiment
  • FIG. 2 is a diagram showing the overall configuration of the in-vehicle system.
  • FIG. 3 is a diagram showing the overall configuration of the in-vehicle system according to the second embodiment
  • FIG. 4 is a diagram showing the overall configuration of the in-vehicle system at the time of non-power feeding according to the third embodiment
  • FIG. 5 is a diagram showing the overall configuration of the in-vehicle system during power feeding
  • FIG. 6 is a diagram showing the overall configuration of the in-vehicle system according to the fourth embodiment.
  • FIG. 1 is a perspective view showing the overall configuration of the battery unit according to the first embodiment
  • FIG. 2 is a diagram showing the overall configuration of the in-vehicle system.
  • FIG. 3 is a diagram showing the overall configuration of the in-vehicle system according to the second embodiment
  • FIG. 4 is a diagram showing the overall configuration of the in-vehicle system
  • FIG. 7 is a flowchart showing the procedure of the charging completion notification process.
  • FIG. 8 is a diagram showing the overall configuration of the in-vehicle system according to the fifth embodiment
  • FIG. 9 is a flowchart showing the procedure of the charging control process.
  • FIG. 10 is a flowchart showing a procedure of overdischarge notification processing according to the sixth embodiment.
  • FIG. 11 is a partially enlarged view of a battery unit according to another embodiment.
  • FIG. 12 is a partially enlarged view of a battery unit according to another embodiment.
  • FIG. 13 is a partially enlarged view of a battery unit according to another embodiment.
  • FIG. 14 is a diagram showing the terminal arrangement of the connector,
  • FIG. 15 is a partially enlarged view of a battery unit according to another embodiment.
  • the vertical direction of the battery unit 10 is defined with reference to FIG. 1 in which the battery unit 10 is installed on a horizontal plane.
  • the battery unit 10 includes a housing case 13 including a lower case body 11 and an upper case body 12, a terminal block 14, a connector 15, and an external charging terminal 16.
  • the terminal block 14 is electrically connected to an external storage battery, a starter, and the like outside the battery unit 10.
  • the connector 15 is electrically connected to a host vehicle ECU or the like.
  • the battery unit 10 includes an internal storage battery as an assembled battery having a plurality of battery cells as single cells, and a control circuit 50 that controls charge / discharge control and the like in the internal storage battery.
  • a lead storage battery 40 is used as an external storage battery.
  • the lithium ion storage battery 41 is used as an internal storage battery.
  • the lithium ion storage battery 41 is a high-performance storage battery that has a higher output density and energy density than the lead storage battery 40 and has high resistance to frequent charging and discharging.
  • the lead storage battery 40 has a storage capacity larger than that of the lithium ion storage battery 41.
  • the rated voltage of the lead storage battery 40 is the same as or substantially the same as the rated voltage of the lithium ion storage battery 41.
  • the lower case body 11 is formed of a metal material such as aluminum, and has a bottom plate portion and a standing wall portion provided upright from the bottom plate portion.
  • the bottom plate portion has a substantially rectangular shape, and a standing wall portion is formed so as to surround the peripheral portion or the vicinity of the peripheral portion.
  • the bottom plate portion is a placement portion on which the lithium ion storage battery 41 is placed.
  • the upper case body 12 is formed of a metal material such as aluminum, for example, as with the lower case body 11, or is formed of a synthetic resin material.
  • the upper case body 12 has a top plate portion 17 and a hanging wall portion 18 extending from the top plate portion 17.
  • the top plate portion 17 has a substantially rectangular shape, and a hanging wall portion 18 is formed so as to surround the peripheral edge portion or the vicinity of the peripheral edge portion.
  • a wallless portion 19 for exposing the terminal block 14, the connector 15, and the external charging terminal 16 to the outside is provided on one side surface of the hanging wall portions 18 provided on each side surface of the four sides. Yes.
  • the upper and lower case bodies 11, 12 are assembled in a state where they overlap each other so that the standing wall portion of the lower case body 11 is inside the case and the hanging wall portion 18 of the upper case body 12 is outside the case. And the lithium ion storage battery 41 and the control circuit 50 are accommodated in the accommodating space in the accommodating case 13 consisting of the case bodies 11 and 12.
  • the battery unit 10 is installed on a vehicle interior floor forming a vehicle compartment, for example, below the front seat of the vehicle or in the vicinity of the feet of the passenger.
  • the battery unit 10 is installed such that the bottom plate portion of the lower case body 11 is horizontal.
  • the external charging terminal 16 is drawn out of the housing case 13.
  • a stud bolt is used as the external charging terminal 16.
  • the terminal block 14 has a power terminal TB.
  • the positive terminal of the lithium ion storage battery 41 is connected to the power supply terminal TB via the connection path LD.
  • the negative electrode terminal of the lithium ion storage battery 41 is grounded.
  • the battery unit 10 includes a first switch unit SW1 corresponding to a switching unit and a second switch unit SW2.
  • the first switch unit SW1 is a semiconductor switch that is provided in the connection path LD and switches between electrical continuity and disconnection when in either the closed state or the open state.
  • the first switch unit SW1 is configured by a pair of N-channel MOSFETs whose sources are connected to each other.
  • the second switch unit SW2 is provided closer to the lithium ion storage battery 41 than the first switch unit SW1 in the connection path LD.
  • the second switch unit SW2 is a semiconductor switch that switches between electrical continuity and interruption by being in either a closed state or an open state.
  • the second switch unit SW2 is configured by a pair of N-channel MOSFETs whose sources are connected to each other.
  • the connector 15 has an output terminal TO.
  • the output terminal TO is connected between the first switch unit SW1 and the second switch unit SW2 in the connection path LD.
  • connection path LD the external charging terminal 16 is connected between the second switch unit SW2 and the positive electrode terminal of the lithium ion storage battery 41 via the charging path LC.
  • the in-vehicle system includes an alternator 30, a starter 31, a first electric load 32, a second electric load 33, and a lead storage battery 40.
  • An alternator 30, a starter 31, a first electric load 32, and a positive electrode terminal of the lead storage battery 40 are connected to the power supply terminal TB.
  • the negative terminal of the lead storage battery 40 is grounded.
  • Alternator 30 includes a stator, a stator coil wound around the stator, a rotor, and a rotor coil wound around the rotor.
  • the rotating shaft of the rotor is connected to an output shaft of a vehicle engine (not shown) by a belt or the like.
  • the alternator 30 generates electricity by rotating the output shaft and the axle.
  • the power generated by the alternator 30 is supplied to a lead storage battery 40, a lithium ion storage battery 41, a first electric load 32, a second electric load 33, and the like.
  • the starter 31 is connected to the lead storage battery 40 in parallel.
  • the starter 31 performs cranking for applying initial rotation to the output shaft of the engine when electric power is supplied from the lead storage battery 40.
  • the first electric load 32 is connected in parallel to the lead storage battery 40.
  • the first electric load 32 includes, for example, a headlight, a windshield wiper, a blower fan for an air conditioner, a defroster heater for a rear windshield, and the like.
  • the second electric load 33 is connected to the output terminal TO.
  • the second electric load 33 includes a constant voltage required load that is required to be stable so that the voltage of the supplied power is substantially constant or at least fluctuates within a predetermined range.
  • the constant voltage required load includes a navigation device as a display unit and a sound generation unit, and an audio device as a sound generation unit.
  • the in-vehicle system includes an external voltage detection unit 42 that detects a terminal voltage of the lead storage battery 40 and an external current detection unit 43 that detects a charge / discharge current flowing through the lead storage battery 40.
  • the in-vehicle system includes an internal voltage detection unit 44 that detects a terminal voltage of the lithium ion storage battery 41 and an internal current detection unit 45 that detects a charge / discharge current flowing through the lithium ion storage battery 41.
  • the internal voltage detection unit 44 and the internal current detection unit 45 are provided in the battery unit 10.
  • the internal current detection unit 45 is provided in the connection path LD so as to be able to detect a current flowing between a connection point with the charging path LC and the positive electrode terminal of the lithium ion storage battery 41.
  • the detection value of each detection unit is input to the control circuit 50 constituting the battery unit 10.
  • the control circuit 50 is mainly composed of a microcomputer.
  • the control circuit 50 performs charge / discharge control for adjusting the charge rate (SOC) of the lead storage battery 40 and the lithium ion storage battery 41 to an appropriate range that does not cause overcharge / discharge based on the detection value of each detection unit.
  • the appropriate range of the lead storage battery 40 is set to a predetermined range from the central value, specifically, for example, set to 90% ⁇ 2%. Further, the appropriate range of the lithium ion storage battery 41 is specifically set to 30 to 80%, for example.
  • the charge / discharge control of the lead storage battery 40 and the charge / discharge control of the lithium ion storage battery 41 can be actually executed by individual control circuits.
  • the point that the control circuit is individually provided is not a main part. Therefore, in the present embodiment, these control circuits are illustrated as a single control circuit 50 for convenience.
  • the control circuit 50 switches the first switch part SW1 and the second switch part SW2 to the closed state on condition that the ignition switch of the vehicle is turned on. As a result, the lithium ion storage battery 41 and the lead storage battery 40 are electrically connected. On the other hand, when the ignition switch is turned off, the control circuit 50 switches the first switch unit SW1 and the second switch unit SW2 to the open state. Thereby, the lithium ion storage battery 41 and the lead storage battery 40 are electrically disconnected.
  • the engine start control and the alternator 30 power generation control are performed by another control circuit (not shown).
  • the battery unit 10 includes the external charging terminal 16. Hereinafter, this reason will be described.
  • the vehicle may be left for a long time and the lithium ion storage battery 41 may not be used for a long time.
  • the charge rate of the lithium ion storage battery 41 is close to the lower limit value of the appropriate range due to the self-discharge of the lithium ion storage battery 41 and the supply of dark current to the device electrically connected to the lithium ion storage battery 41.
  • the lithium ion storage battery 41 in an overdischarged state is in a state where the terminal voltage is low, and the degree of decrease in the terminal voltage of the lithium ion storage battery 41 with respect to the terminal voltage of the lead storage battery 40 can be large.
  • the lithium ion storage battery 41 is made usable again with the lithium ion storage battery 41 mounted on the vehicle.
  • a user or an operator of a maintenance shop connects the external charger CH installed outside the vehicle to the external charging terminal 16 of the battery unit 10 and charges the lithium ion storage battery 41.
  • the external charger CH is connected to the external charging terminal 16. Specifically, when the connection portion with the external charging terminal in the external charger CH has a clip shape, the external charging terminal 16 and the external charger CH are connected by sandwiching the external charging terminal 16 with the clip. .
  • the external charger CH is operated, and charging of the lithium ion storage battery 41 is started. After the charging is completed, the connection portion of the external charger CH is removed from the external charging terminal 16.
  • the power source on the vehicle side is not necessarily required while the lithium ion storage battery 41 is being charged by the external charger CH. For this reason, even if the lead storage battery 40 is in a charged or discharged state or the lead storage battery 40 is not connected to the power supply terminal TB, the lithium ion storage battery 41 can be charged.
  • the lithium ion storage battery 41 can be charged in a state where it is mounted on the vehicle. For this reason, the overdischarge state of the lithium ion storage battery 41 can be eliminated without removing and disassembling the battery unit 10 or replacing the battery unit 10. Thereby, the vehicle can be quickly returned to the normal state.
  • the battery unit 10 can be easily assembled and the safety can be improved. That is, in the manufacturing process of the battery unit 10, in the work of assembling the charged battery cells constituting the lithium ion storage battery 41, it is required to prevent a short circuit between the terminals of the battery cells. For this reason, it is necessary to assemble while ensuring insulation between the terminals of the battery cells.
  • the battery unit 10 can be easily assembled. Since the battery unit 10 of the present embodiment includes the external charging terminal 16, the battery cell can be charged from the outside after the assembly of the battery unit 10 is completed. Then, the battery unit 10 is shipped from the factory in an appropriate charged state. For this reason, the battery unit 10 can be manufactured safely.
  • the power of the lithium ion storage battery 41 can be taken out from the external charging terminal 16 in an emergency.
  • power can be supplied from the lithium ion storage battery 41 to the power supply system including the starter 31 via the external charging terminal 16 even in a situation where the lead storage battery 40 is in an overdischarged state and it is difficult to start the vehicle-mounted engine.
  • the starter 31 can be driven and the engine can be started without waiting for the arrival of the rescue vehicle.
  • a diode 51 is provided in the charging path LC.
  • the diode 51 has an anode connected to the external charging terminal 16 side and a cathode connected to the lithium ion storage battery 41 side.
  • the external charging terminal 16 When the external charging terminal 16 is provided in the battery unit 10, for example, a new closed circuit including the external charging terminal 16 and the lithium ion storage battery 41 is not intended due to a ground fault in which the external charging terminal 16 and the ground are connected. Can be formed. In this case, the positive electrode terminal and the negative electrode terminal of the lithium ion storage battery 41 may be short-circuited, and an overcurrent may flow through the closed circuit. Therefore, in the present embodiment, the diode 51 is provided in the charging path LC. Thereby, even if the closed circuit is formed unintentionally, it is possible to prevent an overcurrent from flowing in the closed circuit. As a result, it is possible to prevent a decrease in the reliability of the in-vehicle system.
  • the battery unit 10 of this embodiment includes a changeover switch unit SWA instead of the second switch unit SW2.
  • a relay having a first contact T1, a second contact T2, and a coil is used as the changeover switch unit SWA.
  • 1st contact T1 is connected to the lithium ion storage battery 41 side rather than 1st switch part SW1 in the connection path
  • the second contact T2 is connected to the charging path LC.
  • the positive electrode terminal of the lithium ion storage battery 41 and the first contact T1 are connected, and the positive electrode terminal and the second contact T2 are disconnected.
  • the lithium ion storage battery 41 is connected to the first switch unit SW1 and the output terminal TO, and the connection between the lithium ion storage battery 41 and the external charging terminal 16 is interrupted.
  • the control circuit 50 implements energization control of the coil. In the present embodiment, power is supplied to the control circuit 50 from the lead storage battery 40 via the power supply terminal TB.
  • a new closed circuit including the external charging terminal 16 and the lithium ion storage battery 41 can be formed unintentionally.
  • the positive and negative terminals of the lithium ion storage battery 41 are short-circuited in a situation where charge / discharge control of the storage batteries 40 and 41 in which the external charging terminal 16 is not used is performed. There is a risk of overcurrent flowing through the closed circuit.
  • the changeover switch unit SWA is provided.
  • the positive electrode terminal of the lithium ion storage battery 41 and the second contact T2 are electrically disconnected.
  • the external charging terminal 16 is electrically disconnected from the lithium ion storage battery 41 and other in-vehicle power supply systems. Therefore, no overcurrent flows through the external charging terminal 16.
  • it can prevent that the closed circuit containing the external charge terminal 16 and the lithium ion storage battery 41 is formed unintentionally, and can prevent that an overcurrent flows into the said closed circuit.
  • the changeover switch unit SWA is configured to connect the positive electrode terminal of the lithium ion storage battery 41 and the second contact T2 by stopping energization of the coil.
  • the charging path LC and the control circuit 50 are connected by a power feeding path LP.
  • the external charger CH when the external charger CH is connected to the external charging terminal 16 and the lithium ion storage battery 41 is charged, power can be supplied from the external charger CH to the control circuit 50.
  • the control circuit 50 can be operated even if sufficient power does not remain in the lead storage battery 40 or the lead storage battery 40 is removed from the power supply terminal TB. It can be.
  • the external charging terminal 16 and the control circuit 50 may be connected by a power feeding path LP.
  • This process is repeatedly executed by the control circuit 50, for example, at predetermined intervals, on condition that power is supplied to the control circuit 50 via the power supply path LP.
  • whether or not power is being supplied may be determined based on, for example, whether or not the supply voltage VP that is the voltage of the power supply path LP is equal to or higher than a predetermined voltage.
  • step S10 the supply voltage VP is acquired.
  • step S12 whether or not the charging current Icg of the lithium ion storage battery 41 detected by the internal current detection unit 45 is equal to or lower than a predetermined current Icth and the supply voltage VP is equal to or higher than a completion determination value Vthf (for example, 14V). Determine whether.
  • This process is a process for determining whether or not the charge amount of the lithium ion storage battery 41 has become sufficient.
  • the process of step S12 corresponds to a completion determination unit.
  • step S12 If an affirmative determination is made in step S12, the process proceeds to step S14 to notify that the charging of the lithium ion storage battery 41 is completed.
  • the process of step S14 corresponds to a completion notification unit.
  • the fact that the charging of the lithium ion storage battery 41 has been completed is performed by at least one of visual notification and auditory notification.
  • the second switch unit SW2 may be switched to the closed state to display the completion on the display of the navigation device included in the second electric load 33, and may be notified by sound or voice.
  • the second switch unit SW2 may be switched to the closed state, and notification may be made by sound or voice using an audio device included in the second electric load 33.
  • the control circuit 50 can be operated by the power supplied from the external charging terminal 16. For this reason, the control circuit 50 can monitor the terminal voltage of the lithium ion storage battery 41 and can grasp the completion of charging. As a result, the control circuit 50 can notify the user of completion of charging. Thereby, after connecting the external charger CH to the external charging terminal 16 and starting the charging of the lithium ion storage battery 41, when the charging is completed, the user can grasp the completion of the charging.
  • a current limiting unit 52 is provided in the charging path LC.
  • the current limiting unit 52 has a regulator function capable of adjusting the amount of charging current flowing from the external charging terminal 16 to the lithium ion storage battery 41 when energized. Note that the current limiting unit 52 may be configured to prevent current flow through itself when the control circuit 50 is not energized.
  • step S20 the terminal voltage VLi of the lithium ion storage battery 41 detected by the internal voltage detection unit 44 is acquired.
  • step S22 it is determined whether or not the acquired terminal voltage VLi is less than the shortage determination value Vths ( ⁇ Vthf).
  • This process is a process for determining whether or not the lithium ion storage battery 41 is in an overdischarged state.
  • the shortage determination value Vths is set to the lower limit value of the appropriate range of the terminal voltage of the lithium ion storage battery 41.
  • the process of step S22 corresponds to a state determination unit.
  • step S22 If an affirmative determination is made in step S22, the process proceeds to step S24, and the amount of charging current supplied from the external charger CH to the lithium ion storage battery 41 via the external charging terminal 16 is adjusted by operating the current limiting unit 52.
  • the output voltage of the current limiting unit 52 that is, the terminal voltage of the lithium ion storage battery 41 detected by the internal voltage detection unit 44 may be gradually increased until it reaches a specified voltage. This is to avoid an overcurrent flowing from the external charger CH to the lithium ion storage battery 41.
  • the output voltage may be gradually increased so that the charging current amount of the lithium ion storage battery 41 becomes a predetermined amount or less.
  • the specified voltage may be set to a value higher than the rated voltage of the lithium ion storage battery 41, for example.
  • step S26 it is determined whether or not the charging current Icg of the lithium ion storage battery 41 is equal to or lower than the predetermined current Icth and the terminal voltage VLi of the lithium ion storage battery 41 is equal to or higher than the completion determination value Vthf.
  • This process is provided for the same purpose as the process of step S12 of FIG. If a positive determination is made in step S26, the process proceeds to step S14.
  • the control circuit 50 is connected to the external charging terminal 16 via the power feeding path LP. For this reason, when it is necessary to connect the external charger CH to the external charging terminal 16 to charge the lithium ion storage battery 41, for example, the lead storage battery 40 is removed and the power supply to the control circuit 50 is cut off. In addition, the control circuit 50 can be operated by the power supplied from the external charging terminal 16. As a result, the current limiter 52 can be operated by the control circuit 50. Thereby, charge control of the lithium ion storage battery 41 using the external charging terminal 16 can be implemented appropriately.
  • the internal current detector 45 is provided in the connection path LD so as to be able to detect the current flowing between the connection point with the charging path LC and the positive terminal of the lithium ion storage battery 41. For this reason, the electric current detection part used for charging / discharging control of the lithium ion storage battery 41 in which the external charging terminal 16 after the ignition switch is turned on is not used can be used for charging control using the external charging terminal 16. Thereby, it is not necessary to provide the battery unit 10 with a new current detection unit. Therefore, the number of parts of the battery unit 10 can be reduced, and the cost can be reduced.
  • FIG. 10 shows the procedure of this process. This process is repeatedly executed by the control circuit 50, for example, at predetermined intervals after the ignition switch is turned on.
  • step S30 the terminal voltage VLi of the lithium ion storage battery 41 detected by the internal voltage detection unit 44 is acquired.
  • step S32 it is determined whether or not the acquired terminal voltage VLi is less than the shortage determination value Vths.
  • step S34 the process proceeds to step S34 to perform processing for notifying that the lithium ion storage battery 41 is in an overdischarged state.
  • notification may be performed using a navigation device or an audio device as described above, or a failure warning lamp may be turned on for notification.
  • the process of step S34 corresponds to an overdischarge notification unit.
  • the user can be notified that the lithium ion storage battery 41 is in an overdischarged state. Thereby, a user can be prompted to charge the lithium ion storage battery 41.
  • an insulating cover 20 as shown in FIG. 11 may be attached to the external charging terminal 16.
  • the insulating cover 20 is formed of a material having electrical insulation properties, for example, a synthetic resin material. Thereby, an unnecessary electric leakage and short circuit via the external charging terminal 16 when the external charging terminal 16 is not used can be prevented.
  • the external charging terminal is not limited to that shown in FIG. 1, but may be the one described in (A) to (C) below, for example.
  • the external charging terminal 21 may be a charging connector in which the power supply connector of the external charger CH can be inserted and removed.
  • the external charging terminal 23 may be one of a plurality of terminals provided in the same connector 22 as shown in FIGS. 13 and 14. 13 and 14 illustrate an 8-pin connector 22. FIG. 14 also shows signals Sig + and Sig ⁇ of communication lines used for communication such as CAN, a terminal Tig to which an operation signal of the ignition switch is transmitted, an output terminal TO, a ground terminal GND, and a vehicle accessory switch signal. The terminal ACC to which the signal is transmitted and the other terminal Tor are illustrated.
  • the external charging terminal 24 may be drawn from the charging path LC in the battery unit 10 through the lead wire 25 as shown in FIG.
  • the battery unit 10 may be provided with the insulating cover described in FIG. 11 in accordance with the shape of each external charging terminal shown in FIGS.
  • the determination method for determining whether or not the lithium ion storage battery 41 is in an overdischarged state is not limited to the method in step S22 of FIG. For example, when it is determined that the charging rate of the lithium ion storage battery 41 is less than the lower limit value of the appropriate range, it may be determined that the lithium ion storage battery 41 is in an overdischarged state.
  • the method for determining whether or not the charge amount of the lithium ion storage battery 41 is sufficient is not limited to the method in step S26 of FIG. For example, when it is determined that the charging rate of the lithium ion storage battery 41 is equal to or higher than a predetermined charging rate that is larger than the lower limit value of the appropriate range, the charging amount of the lithium ion storage battery 41 may be determined to be sufficient.
  • connection destination of the alternator 30 may be the output terminal TO instead of the power supply terminal TB.
  • the lithium ion storage battery 41 may be included in the power supply source of the control circuit 50.
  • the power supply source of the control circuit 50 may be a lithium ion storage battery 41 instead of the lead storage battery 40.
  • the charging path LC may be directly connected to the positive electrode terminal of the lithium ion storage battery 41 instead of the connection path LD.
  • a mechanical switch that can be switched between an open state and a closed state by a user's manual operation may be provided in the charging path LC.
  • a diode may be provided in the charging path LC.
  • a diode having an anode connected to the external charging terminal 16 side is provided on the external charging terminal 16 side of the charging path LC with respect to the connection point with the power feeding path LP. That's fine.
  • a resistor may be used as the current limiting unit 52. Even in this case, for example, it is possible to suppress a short-circuit current from flowing due to the above-described ground fault, and it is possible to limit the charging current when charging the lithium ion storage battery 41 using the external charging terminal 16. In this case, as long as the lithium ion storage battery 41 is properly charged, the power of the lithium ion storage battery 41 can be taken out from the external charging terminal 16 in an emergency. However, since the resistor is provided, the power that can be taken out is reduced as compared with the case where the resistor is not provided. For this reason, for example, the engine cannot be started by driving the starter 31.
  • the cathode of the diode 51 may be directly connected to the connection point of the charging path LC and the connection path LD.
  • route LC can be increased.
  • the switch units SW1 and SW2 are always switched to the closed state, and the lead storage battery 40 and the lithium ion storage battery 41 are automatically connected.
  • This configuration is a convenient system for increasing the charging rate of the lithium ion storage battery 41.
  • the lead storage battery 40 and the lithium The automatic connection with the ion storage battery 41 poses a problem that an adverse effect of overcurrent inevitably occurs.
  • the overdischarge state of the lithium ion storage battery 41 is detected before the lead storage battery 40 and the lithium ion storage battery 41 are automatically connected. And when an overdischarge state is detected, you may notify that to a user and you may control so that the lead storage battery 40 and the lithium ion storage battery 41 are not connected automatically. Specifically, for example, control may be performed so that at least one of the switch units SW1 and SW2 is not switched to the closed state. Thereby, the bad influence of overcurrent can be reduced, enjoying the convenience which raises the charging rate of the lithium ion storage battery 41 automatically.
  • the external storage battery is the lead storage battery 40 and the internal storage battery is the lithium ion storage battery 41, but this is not limitative.
  • Both the external storage battery and the internal storage battery may be the same type of storage battery, for example, both the external storage battery and the internal storage battery are lead storage batteries or lithium ion storage batteries.
  • storage batteries of types other than a lead storage battery and a lithium ion storage battery may be sufficient.
  • the first switch unit SW1 and the second switch unit SW2 are not limited to semiconductor switches configured by MOSFETs, and for example, semiconductor switches configured by thyristors or solid state relays may be used.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
PCT/JP2017/019728 2016-05-31 2017-05-26 車載電池ユニット Ceased WO2017208999A1 (ja)

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JP7014191B2 (ja) * 2019-01-09 2022-02-01 株式会社デンソー 通電制御装置
JP7488228B2 (ja) * 2021-07-28 2024-05-21 矢崎総業株式会社 車両用制御ユニット及び車両用制御システム
JP2026055131A (ja) * 2024-09-18 2026-03-31 株式会社オートネットワーク技術研究所 車載用電力供給装置

Citations (9)

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Publication number Priority date Publication date Assignee Title
JPH11164409A (ja) * 1997-11-27 1999-06-18 Suzuki Motor Corp 電気自動車用バッテリーの充電制御方法およびその装置
JP2000069689A (ja) * 1998-08-26 2000-03-03 Matsushita Electric Ind Co Ltd 電池パック装置
JP2001208815A (ja) * 2000-01-26 2001-08-03 Honda Motor Co Ltd バッテリの残量検知方法
JP2010033773A (ja) * 2008-07-25 2010-02-12 Panasonic Corp 電池パック、及び電池システム
JP2010219009A (ja) * 2009-03-19 2010-09-30 Nec Energy Devices Ltd 電池パック
JP2012009277A (ja) * 2010-06-24 2012-01-12 Sanyo Electric Co Ltd バッテリパック
JP2014132585A (ja) * 2009-09-30 2014-07-17 Toshiba Corp 二次電池装置
JP2015028839A (ja) * 2011-11-25 2015-02-12 三洋電機株式会社 電池パック
JP2016021792A (ja) * 2014-07-11 2016-02-04 日立マクセル株式会社 蓄電装置

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11164409A (ja) * 1997-11-27 1999-06-18 Suzuki Motor Corp 電気自動車用バッテリーの充電制御方法およびその装置
JP2000069689A (ja) * 1998-08-26 2000-03-03 Matsushita Electric Ind Co Ltd 電池パック装置
JP2001208815A (ja) * 2000-01-26 2001-08-03 Honda Motor Co Ltd バッテリの残量検知方法
JP2010033773A (ja) * 2008-07-25 2010-02-12 Panasonic Corp 電池パック、及び電池システム
JP2010219009A (ja) * 2009-03-19 2010-09-30 Nec Energy Devices Ltd 電池パック
JP2014132585A (ja) * 2009-09-30 2014-07-17 Toshiba Corp 二次電池装置
JP2012009277A (ja) * 2010-06-24 2012-01-12 Sanyo Electric Co Ltd バッテリパック
JP2015028839A (ja) * 2011-11-25 2015-02-12 三洋電機株式会社 電池パック
JP2016021792A (ja) * 2014-07-11 2016-02-04 日立マクセル株式会社 蓄電装置

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