WO2014068917A1 - 車両用電源装置 - Google Patents
車両用電源装置 Download PDFInfo
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- WO2014068917A1 WO2014068917A1 PCT/JP2013/006294 JP2013006294W WO2014068917A1 WO 2014068917 A1 WO2014068917 A1 WO 2014068917A1 JP 2013006294 W JP2013006294 W JP 2013006294W WO 2014068917 A1 WO2014068917 A1 WO 2014068917A1
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- Prior art keywords
- storage battery
- voltage
- power
- connection point
- storage unit
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- 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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
-
- 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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
-
- 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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
-
- 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
- B60R16/033—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 characterised by the use of electrical cells or batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- 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
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
-
- 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
- H01M10/06—Lead-acid accumulators
-
- 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
- H01M10/34—Gastight accumulators
- H01M10/345—Gastight metal hydride accumulators
-
- 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
-
- 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
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/46—The network being an on-board power network, i.e. within a vehicle for ICE-powered road vehicles
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- 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 vehicle power supply device to be mounted on a vehicle.
- lead-acid batteries Electric power is supplied from the lead storage battery to the starter motor and various electrical components.
- lead acid batteries are inexpensive, they have a characteristic that their cycle life is short compared to nickel metal hydride batteries and lithium ion batteries. In vehicles having an idling stop function, the number of times of charging / discharging increases, so the life of the lead-acid battery is particularly short.
- storage battery failure determination is performed by monitoring the voltage across both ends. As described above, when a lead storage battery and a nickel hydride storage battery or a lithium ion storage battery are connected in parallel, one voltage fluctuation affects the other terminal voltage. Therefore, the case where the state of a storage battery cannot be detected correctly may occur.
- the present invention has been made in view of such circumstances, and an object thereof is to provide a technique for accurately detecting the state of storage batteries connected in parallel.
- a vehicle power supply device includes a first power storage unit connected in parallel, storing electric power generated by a generator in a vehicle and supplying power to a load in the vehicle, and A second power storage unit; and a control unit that manages at least the second power storage unit.
- the second power storage unit includes a plurality of storage battery cells connected in series.
- the control unit detects an abnormality of the second power storage unit by monitoring a voltage division ratio of the plurality of storage battery cells.
- the in-vehicle power supply device is mounted on a vehicle having an idling stop function and a deceleration energy regeneration function.
- the idling stop function is a function that automatically stops the engine when the vehicle stops and restarts the engine automatically when starting.
- the deceleration energy regeneration function is a function that generates power intensively at the time of deceleration when the engine is rotating due to inertia regardless of fuel. That is, during normal driving, the operation of the alternator is suppressed as much as possible to reduce the engine load. Both functions have the effect of improving fuel consumption.
- the number of engine starts increases in vehicles equipped with an idling stop function.
- the engine is usually started by a starter motor driven by battery voltage. Therefore, as the number of engine starts increases, the power consumption of the battery increases and the number of discharges increases.
- a vehicle equipped with a deceleration energy regeneration function is intensively activated during deceleration, a battery capable of efficient charging with a large capacity is required.
- FIG. 1 is a diagram for explaining an in-vehicle power supply device 100 according to an embodiment of the present invention.
- an alternator 200 In a vehicle on which the in-vehicle power supply device 100 is mounted, an alternator 200, a starter 300, an electrical component 400, and an ECU (Electronic Control Unit) 500 are mounted as members related to the in-vehicle power supply device 100.
- an alternator 200 In a vehicle on which the in-vehicle power supply device 100 is mounted, an alternator 200, a starter 300, an electrical component 400, and an ECU (Electronic Control Unit) 500 are mounted as members related to the in-vehicle power supply device 100.
- an alternator 200 In a vehicle on which the in-vehicle power supply device 100 is mounted, an alternator 200, a starter 300, an electrical component 400, and an ECU (Electronic Control Unit) 500 are mounted as members related to the in-vehicle power supply device 100.
- an alternator 200 In a vehicle on which
- the alternator 200 generates power by the rotational energy of the crankshaft of the engine (not shown). In the present embodiment, power is generated mainly during deceleration. The alternator 200 supplies the generated power to the in-vehicle power supply device 100.
- the starter 300 is an engine starting motor.
- the starter 300 is rotated by the electric power supplied from the in-vehicle power supply device 100 and starts the engine.
- an ignition switch (not shown) is turned on by the driver's operation, power is supplied from the in-vehicle power supply device 100 to the starter 300, and the starter 300 is started.
- the electrical component 400 is a generic name indicating various electric loads mounted in a vehicle such as a headlight, a power steering, an oil pump, a car navigation system, and an audio.
- a vehicle such as a headlight, a power steering, an oil pump, a car navigation system, and an audio.
- the alternator 200, the starter 300, and the ECU 500 are drawn separately from the electrical component 400.
- the electrical component 400 is driven by electric power supplied from the in-vehicle power supply device 100.
- ECU 500 is connected to various auxiliary devices, sensors, and switches mounted in the vehicle, and electronically controls the engine and various auxiliary devices.
- ECU 500 stops the engine when it detects stop of the vehicle or deceleration to a set speed or less based on a signal input from a brake, a vehicle speed sensor or the like. Further, ECU 500 restarts the engine when it detects that the brake is released. At that time, control is performed so that electric power is supplied from the in-vehicle power supply device 100 to the starter 300, and the starter 300 is operated.
- the ECU 500 When executing the deceleration energy regeneration function, the ECU 500 basically stops the alternator 200 during normal driving. ECU 500 activates alternator 200 when it detects deceleration of the vehicle based on signals input from a brake, a vehicle speed sensor or the like. When the capacity of the battery in in-vehicle power supply device 100 is lower than the set lower limit capacity, ECU 500 operates alternator 200 even during normal travel.
- the on-vehicle power supply device 100 includes a first storage battery 10, a second storage battery 20, a first storage battery control unit 30, a second storage battery control unit 40, and a DC-DC converter 50.
- the first storage battery 10 is a main battery for storing electric power generated by the alternator 200 and supplying power to the starter 300 and the electrical component 400.
- the second storage battery 20 is a sub-battery for storing the power generated by the alternator 200 and supplying power to the starter 300 and the electrical component 400.
- the first storage battery 10 and the second storage battery 20 are connected in parallel.
- a lead storage battery is used for the first storage battery 10 and a nickel hydride storage battery is used for the second storage battery 20.
- Lead storage batteries are relatively inexpensive, can operate in a relatively wide temperature range, and have advantages such as high output, and are widely used as storage batteries for vehicles.
- disadvantages such as low charge / discharge energy efficiency, weakness against overdischarge, and short cycle life.
- Nickel metal hydride storage batteries have advantages such as relatively high charge / discharge energy efficiency, resistance to overcharge and overdischarge, a wide use temperature range, a wide SOC (State (Of Charge) range, and a relatively long cycle life.
- SOC State
- there are disadvantages such as a large self-discharge, a memory effect, low voltage, and higher cost than a lead-acid battery.
- the number of times the starter 300 is used increases, so it is necessary to increase the capacity of the storage battery.
- the capacity of the entire storage battery is increased while compensating for the disadvantages of each storage battery.
- a lithium ion storage battery is a high-performance storage battery with high energy density and charge / discharge energy efficiency, but requires strict voltage / temperature management.
- a nickel metal hydride storage battery is more suitable than a lithium ion storage battery in order to be installed integrally with a lead storage battery in an engine room.
- the temperature rises when the engine is operated but the nickel metal hydride storage battery is more resistant to high temperatures than the lithium ion storage battery.
- the loss by wiring resistance becomes large in that case.
- Alternator 200, starter 300, first storage battery 10, second storage battery 20, and electrical component 400 are connected by path P1.
- the DC-DC converter 50 is inserted into the path P1.
- the DC-DC converter 50 is provided for voltage compensation so that the voltage of the path P1 does not drop below a predetermined voltage when the engine is cranked and restarted from the idling stop state.
- the above-described path P1 is designed to be 12V.
- Some electrical components 400 are reset when the voltage drops to about 10 V, such as a car navigation system.
- the starter 300 is operated, the ECU 500 operates the DC-DC converter 50, so that the potential of the charge / discharge terminal of the second storage battery 20 is stabilized and a stable voltage can be continuously supplied to the electrical component 400. .
- the first storage battery control unit 30 manages and controls the first storage battery 10. Specifically, the voltage, current, and temperature of the first storage battery 10 are acquired, and the remaining capacity of the first storage battery 10 and the presence or absence of an abnormality are monitored. The first storage battery control unit 30 notifies the ECU 500 of the remaining capacity of the first storage battery 10 and the normality or abnormality of the first storage battery 10.
- the first storage battery control unit 30, the second storage battery control unit 40, and the ECU 500 communicate with each other by, for example, CAN (Controller (Area (Network).
- the second storage battery control unit 40 manages and controls the second storage battery 20.
- the 2nd storage battery control part 40 is demonstrated more concretely.
- FIG. 2 is a diagram for explaining the second storage battery control unit 40 of FIG. 1.
- the second storage battery control unit 40 includes a key input detection circuit 41, a high side switch 42, a constant voltage generation circuit 43, a battery state detection circuit 44, a communication interface 45, a CPU 46, and a memory 47.
- the key input detection circuit 41 detects the insertion / removal of the ignition key.
- the key input detection circuit 41 controls the high side switch 42 to be turned on when the ignition key is inserted by the driver, and controls the high side switch 42 to be turned off when the ignition key is removed. Note that the key input detection circuit 41 may keep the high side switch 42 off when the key position is OFF, and control the high side switch 42 to be on with ACC, ON, or START.
- the high side switch 42 is provided between the path P1 and the constant voltage generation circuit 43.
- the high side switch 42 is controlled to be turned on, the voltage of the path P ⁇ b> 1 is supplied to the constant voltage generation circuit 43.
- the constant voltage generation circuit 43 generates a power supply voltage for the CPU 46.
- the 12V voltage of the path P1 is stepped down to a voltage of about 3 to 5V.
- a three-terminal regulator can be used for the constant voltage generation circuit 43.
- the battery state detection circuit 44 acquires the voltage, current, and temperature of the second storage battery 20.
- the battery state detection circuit 44 notifies the CPU 46 of the voltage, current, and temperature of the second storage battery 20.
- Communication interface 45 is an interface for communicating with second storage battery control unit 40 and other control circuits (first storage battery control unit 30 and ECU 500 in the present embodiment).
- the communication interface 45 transmits information received from the outside to the CPU 46 and transmits information output from the CPU 46 to the outside.
- the communication interface 45 transmits the abnormality detection of the second storage battery 20 or the second storage battery control unit 40 to the ECU 500.
- the state information for example, voltage, current, temperature
- a power generation request by the alternator 200 is transmitted to the ECU 500.
- the SOC of the first storage battery 10 may be acquired from the first storage battery control unit 30.
- the CPU 46 controls the second storage battery control unit 40 as a whole. In particular, the state management of the second storage battery 20 is performed.
- the memory 47 holds a control program executed by the CPU 46 and data generated by the CPU 46.
- FIG. 3 is a diagram showing a configuration example 1 of the second storage battery 20.
- Second storage battery 20 includes a series-parallel circuit 20a formed of a plurality of storage battery cells and a shunt resistor Rs.
- Configuration example 1 includes 10 series and 2 parallel series-parallel circuits 20a.
- the series-parallel circuit 20a is configured by a combination of four storage battery modules.
- One storage battery module includes five storage battery cells connected in series.
- the first storage battery module 21 and the second storage battery module 22 are connected in series, and the third storage battery module 23 and the fourth storage battery module 24 are connected in series.
- Each series circuit is connected in parallel to form a series-parallel circuit 20a.
- the positive terminal of the series / parallel circuit 20a is connected to the path P1, and the negative terminal is connected to one end of the shunt resistor Rs.
- the other end of the shunt resistor Rs is connected to the ground.
- the third node N3, the fourth node N4 between the negative terminal of the series-parallel circuit 20a and one end of the shunt resistor Rs, and the fifth node N5 between the other end of the shunt resistor Rs and the ground are connected to the battery state detection circuit 44, respectively. Is done.
- the battery state detection circuit 44 detects the potential of the first node N1 to the fifth node N5 and notifies the CPU 46 of it.
- the second storage battery 20 further includes a thermistor (not shown), and the thermistor outputs the detected temperature to the battery state detection circuit 44.
- the battery state detection circuit 44 notifies the CPU 46 of the acquired temperature.
- a nickel hydride storage battery cell is used as the storage battery cell. Since the nickel hydride storage battery cell does not require strict cell voltage equalization control unlike the lithium ion storage battery cell, it is not necessary to detect the voltage for each cell. For each series circuit forming the series-parallel circuit 20a, it is sufficient to detect the potentials at both ends and the potential of at least one inter-cell node. In the configuration example 1, since the series circuit is configured by connecting two storage battery modules in series, the midpoint potential of the two storage battery modules is monitored. That is, the voltage dividing point of 1: 1 is monitored with respect to the voltage across the series-parallel circuit 20a.
- FIG. 4 is a flowchart for explaining a failure determination process of the second storage battery 20 according to the configuration example 1.
- the second storage battery control unit 40 includes a first voltage V1 between the first node N1 and the second node N2, a second voltage V2 between the second node N2 and the fourth node N4, and between the first node N1 and the third node N3.
- the third voltage V3, and the fourth voltage V4 between the third node N3 and the fourth node N4 are detected (S10).
- the second storage battery control unit 40 determines whether or not the ratio of the first voltage V1 and the second voltage V2 substantially matches the set ratio of 1: 1 (S12). Since the second node N2 is a voltage dividing point of the first storage battery module 21 and the second storage battery module 22 each including the same number of storage battery cells, all the storage battery cells of the first storage battery module 21 and the second storage battery module 22 are normal. If present, the ratio between the first voltage V1 and the second voltage V is approximately 1: 1. On the other hand, if a short circuit has occurred in any of the storage battery cells, the ratio between the first voltage V1 and the second voltage V will not be approximately 1: 1. For example, when one storage battery cell included in the first storage battery module 21 is short-circuited, the ratio between the first voltage V1 and the second voltage V is approximately 4: 5.
- step S12 when the ratio between the first voltage V1 and the second voltage V is not approximately 1: 1 (N in S12), the second storage battery control unit 40 determines that the second storage battery 20 is abnormal (S19). At that time, whether the first storage battery module 21 has an abnormality or the second storage battery module 22 has an abnormality can be estimated based on the magnitude relationship between the first voltage V1 and the second voltage V or their respective values. It can be presumed that a short circuit has basically occurred in the battery module with the smaller voltage. When the second storage battery control unit 40 determines that the second storage battery 20 is abnormal, the second storage battery control unit 40 notifies the ECU 500 of the abnormality. Upon receiving the notification, ECU 500 performs stop control of alternator 200, alert notification to the driver, and the like.
- the second storage battery control unit 40 When the ratio between the first voltage V1 and the second voltage V2 is approximately 1: 1 in step S12 (Y in S12), the second storage battery control unit 40 has a ratio between the third voltage V3 and the fourth voltage V4. Then, it is determined whether or not it substantially matches the set ratio of 1: 1 (S14). When the ratio between the third voltage V3 and the fourth voltage V4 is not approximately 1: 1 (N in S14), the second storage battery control unit 40 determines that there is an abnormality in the second storage battery 20 (S19). Then, ECU 500 is notified of the abnormality.
- the second storage battery control unit 40 determines that the ratio between the first voltage V1 and the third voltage V3 is Then, it is determined whether or not it substantially matches the set ratio of 1: 1 (S16).
- step S12 and step S14 If the determination results of step S12 and step S14 are good, it can be estimated that the second storage battery 20 is basically normal. However, for example, when one storage battery cell is short-circuited in each of the first storage battery module 21 and the second storage battery module 22, the voltage dividing ratio is normal, so that the first storage battery module 21 and the second storage battery module 22 are mistaken as normal. There is a possibility of judging. Therefore, a more accurate failure determination is performed by comparing the voltages of the storage battery modules in parallel.
- step S16 when the ratio between the first voltage V1 and the third voltage V3 is not approximately 1: 1 (N in S16), the second storage battery control unit 40 determines that the second storage battery 20 is abnormal (S19). Then, ECU 500 is notified of the abnormality. When the ratio between the first voltage V1 and the third voltage V3 is approximately 1: 1 (Y in S16), the second storage battery control unit 40 determines that the second storage battery 20 is normal (S18).
- the second voltage V2 and the fourth voltage V4 It may be determined whether the ratio is approximately 1: 1.
- the second storage battery control unit 40 detects a current abnormality (for example, overcurrent) by detecting a voltage between the fifth node N5 and the sixth node N6 (that is, a voltage across the shunt resistor Rs).
- the second storage battery control unit 40 detects a temperature abnormality based on a temperature detected by a thermistor (not shown).
- FIG. 5 is a diagram showing a configuration example 2 of the second storage battery 20.
- the second storage battery 20 includes a series circuit 20b formed of a plurality of storage battery cells and a shunt resistor Rs.
- the configuration example 2 includes 15 series 2 series circuits 20b.
- the series circuit 20b is configured by a combination of three storage battery modules.
- One storage battery module includes five storage battery cells connected in series.
- the first storage battery module 21, the second storage battery module 22, and the third storage battery module 23 are connected in series to form a series circuit 20b.
- the positive terminal of the series circuit 20b is connected to the path P1, and the negative terminal is connected to one end of the shunt resistor Rs.
- the other end of the shunt resistor Rs is connected to the ground.
- the negative terminal of the series circuit 20b and one end of the shunt resistor Rs are connected to the battery state detection circuit 44, respectively.
- the battery state detection circuit 44 monitors a voltage dividing point of 1: 2 with respect to the voltage across the series circuit 20b.
- FIG. 6 is a flowchart for explaining a failure determination process for the second storage battery 20 according to Configuration Example 2.
- the second storage battery control unit 40 detects the first voltage V1 between the first node N1 and the second node N2, and the second voltage V2 between the second node N2 and the fourth node N4, respectively (S20).
- the second storage battery control unit 40 determines whether or not the ratio between the first voltage V1 and the second voltage V2 substantially matches 1: 2 that is the set ratio (S22). When the ratio between the first voltage V1 and the second voltage V is not approximately 1: 2 (N in S22), the second storage battery control unit 40 determines that there is an abnormality in the second storage battery 20 (S26). When the ratio between the first voltage V1 and the second voltage V is approximately 1: 2 (Y in S22), the second storage battery control unit 40 determines that the second storage battery 20 is normal (S24).
- the abnormality detection of the second storage battery 20 connected in parallel to the first storage battery 10 is performed, and the partial pressure ratio of the plurality of storage battery cells connected in series forming the second storage battery 20 is determined. It can be done accurately by monitoring. That is, simply monitoring the voltage across the second storage battery 20 may cause a case where an abnormality cannot be detected due to the influence of the voltage of the first storage battery 10 connected in parallel. Specifically, when one of the storage battery cells forming the second storage battery 20 is short-circuited, the positive electrode potential of the second storage battery 20 should decrease, but the voltage of the first storage battery 10 causes the positive electrode potential of the second storage battery 20 to decrease. Will be maintained.
- the partial pressure ratio of the storage battery cells forming the second storage battery 20 is monitored, even if the positive potential of the second storage battery 20 is maintained, the partial pressure ratio collapses. Detect without overlooking. Moreover, it is not necessary to monitor all the nodes between the storage battery cells, and it is sufficient to monitor one node, so that an increase in wiring can be suppressed. If more nodes are monitored, it will be easier to identify which storage battery cell has an abnormality. Therefore, designers should consider the trade-off relationship between simplification of wiring and the ability to identify abnormal cells. What is necessary is just to determine the number of nodes to perform.
- the 1st storage battery 10 may be managed and controlled by a single control circuit.
- a fuse may be inserted between the path P1 and the second storage battery 20 described above.
- the second storage battery 20 can be protected from a large current.
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- Electrochemistry (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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- Control Of Charge By Means Of Generators (AREA)
Abstract
Description
Claims (4)
- 車両内の発電機により発電される電力を蓄え、車両内の負荷に給電する、並列接続された第1蓄電部および第2蓄電部と、
少なくとも前記第2蓄電部を管理する制御部と、を備え、
前記第2蓄電部は、直列接続された複数の蓄電池セルを含み、
前記制御部は、前記複数の蓄電池セルの分圧比を監視して前記第2蓄電部の異常を検出することを特徴とする車両用電源装置。 - 前記制御部は、前記複数の蓄電池セルの正極電位、負極電位、及び一つの接続点電位を監視し、前記正極と前記接続点間の電圧と、前記接続点と前記負極間の電圧との比率が設定比率に対応しないとき、前記第2蓄電部を異常と判定することを特徴とする請求項1に記載の車両用電源装置。
- 前記第2蓄電部は、複数の蓄電池セルが直列接続された第1蓄電池セル群と、複数の蓄電池セルの直列接続された第2蓄電池セル群を含み、
前記第1蓄電池セル群と前記第2蓄電池セル群は並列接続され、
前記制御部は、前記第1蓄電池セル群及び前記第2蓄電池セル群の正極電位、負極電位、前記第1蓄電池セル群の一つの第1接続点電位、並びに前記第2蓄電池セル群の一つの第2接続点電位を監視し、
前記正極と前記第1接続点間の電圧と、前記正極と前記第2接続点間の電圧との比率が設定比率に対応しないとき、又は前記第1接続点と前記負極間の電圧と、前記第2接続点と前記負極間の電圧との比率が設定比率に対応しないとき、前記第2蓄電部を異常と判定することを特徴とする請求項1に記載の車両用電源装置。 - 前記第1蓄電部は鉛蓄電池を含み、前記第2蓄電部は複数のニッケル水素蓄電池セルを含むことを特徴とする請求項1から3のいずれかに記載の車両用電源装置。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/435,440 US20150298556A1 (en) | 2012-10-29 | 2013-10-24 | Power supply device for vehicle |
| JP2014544261A JP6215220B2 (ja) | 2012-10-29 | 2013-10-24 | 車両用電源装置 |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2012238300 | 2012-10-29 | ||
| JP2012-238300 | 2012-10-29 |
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| WO2014068917A1 true WO2014068917A1 (ja) | 2014-05-08 |
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| PCT/JP2013/006294 Ceased WO2014068917A1 (ja) | 2012-10-29 | 2013-10-24 | 車両用電源装置 |
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| Country | Link |
|---|---|
| US (1) | US20150298556A1 (ja) |
| JP (1) | JP6215220B2 (ja) |
| WO (1) | WO2014068917A1 (ja) |
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| JP2016023979A (ja) * | 2014-07-17 | 2016-02-08 | パナソニックIpマネジメント株式会社 | 鉛蓄電池の劣化判定装置及び鉛蓄電池の劣化判定方法 |
| JP2016075567A (ja) * | 2014-10-06 | 2016-05-12 | 株式会社Gsユアサ | 蓄電素子の異常判断装置 |
| JP2016203793A (ja) * | 2015-04-22 | 2016-12-08 | 株式会社デンソー | 電源装置 |
| WO2021010090A1 (ja) * | 2019-07-18 | 2021-01-21 | 株式会社Gsユアサ | 蓄電装置の保守方法、及び、保守プログラム |
| US11180032B2 (en) * | 2017-03-31 | 2021-11-23 | Sanyo Electric Co., Ltd. | Monitoring device and power storage system |
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| US9616762B2 (en) * | 2013-04-05 | 2017-04-11 | Nissan Motor Co., Ltd. | Vehicle power supply device |
| KR20150052677A (ko) * | 2013-11-06 | 2015-05-14 | 엘에스산전 주식회사 | 전기 자동차의 ldc 제어 장치 |
| JP2015217920A (ja) * | 2014-05-21 | 2015-12-07 | オムロンオートモーティブエレクトロニクス株式会社 | 車両用電源装置、車両用回生システム |
| JP2015217919A (ja) * | 2014-05-21 | 2015-12-07 | オムロンオートモーティブエレクトロニクス株式会社 | 車両用電源装置、車両用回生システム |
| JP6540565B2 (ja) * | 2016-03-16 | 2019-07-10 | 株式会社オートネットワーク技術研究所 | 車両用電源供給システム、車両用駆動システム |
| WO2017191818A1 (ja) * | 2016-05-02 | 2017-11-09 | 株式会社 東芝 | 電源装置 |
| WO2019123907A1 (ja) * | 2017-12-22 | 2019-06-27 | 三洋電機株式会社 | 管理装置、及び電源システム |
| US20220231516A1 (en) * | 2021-01-19 | 2022-07-21 | The Boeing Company | Reconfigurable battery system for efficient charging and discharging |
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| JP2016023979A (ja) * | 2014-07-17 | 2016-02-08 | パナソニックIpマネジメント株式会社 | 鉛蓄電池の劣化判定装置及び鉛蓄電池の劣化判定方法 |
| JP2016075567A (ja) * | 2014-10-06 | 2016-05-12 | 株式会社Gsユアサ | 蓄電素子の異常判断装置 |
| JP2016203793A (ja) * | 2015-04-22 | 2016-12-08 | 株式会社デンソー | 電源装置 |
| US11180032B2 (en) * | 2017-03-31 | 2021-11-23 | Sanyo Electric Co., Ltd. | Monitoring device and power storage system |
| WO2021010090A1 (ja) * | 2019-07-18 | 2021-01-21 | 株式会社Gsユアサ | 蓄電装置の保守方法、及び、保守プログラム |
| JP2021018876A (ja) * | 2019-07-18 | 2021-02-15 | 株式会社Gsユアサ | 蓄電装置の保守方法、及び、保守プログラム |
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| JPWO2014068917A1 (ja) | 2016-09-08 |
| JP6215220B2 (ja) | 2017-10-18 |
| US20150298556A1 (en) | 2015-10-22 |
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