WO2007136126A1 - 蓄電装置の充放電制御装置および充放電制御方法 - Google Patents
蓄電装置の充放電制御装置および充放電制御方法 Download PDFInfo
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- WO2007136126A1 WO2007136126A1 PCT/JP2007/060751 JP2007060751W WO2007136126A1 WO 2007136126 A1 WO2007136126 A1 WO 2007136126A1 JP 2007060751 W JP2007060751 W JP 2007060751W WO 2007136126 A1 WO2007136126 A1 WO 2007136126A1
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- temperature
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Classifications
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- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
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- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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- B60L58/13—Maintaining the SoC within a determined range
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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
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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
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- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Definitions
- the present invention relates to a charge / discharge control device and a charge / discharge control method for a power storage device configured to be chargeable / dischargeable, and more particularly, to a technique for performing a reliable restart when restarting after a vehicle system is stopped.
- Electric vehicles such as hybrid vehicles and electric vehicles that can generate electricity while running are equipped with power storage devices such as secondary batteries and electric double layer capacitors.
- power storage devices such as secondary batteries and electric double layer capacitors.
- electric power stored in the power storage device is converted into driving force by a motor generator, and the driving force is transmitted to the wheels either alone or together with the driving force generated by the engine.
- secondary batteries store electrical energy using chemical action
- their charge / discharge characteristics change greatly according to environmental requirements, especially temperature conditions. That is, at low temperatures, the reactivity of the chemical action is greatly reduced, and it may be difficult to generate sufficient discharge power. For this reason, in the early morning of winter and in cold regions, the power that can be supplied from the secondary battery decreases, and in hybrid vehicles that are configured to start by cranking the engine with a motor generator, The problem may be that the vehicle system including the cannot be started.
- Such temperature dependence is particularly prominent in lithium ion batteries, which have a higher energy density than nickel hydrogen batteries.
- electric double layer capacitors also have temperature dependence, and the power that can be supplied at low temperatures decreases.
- Japanese Patent Application Laid-Open No. 11-35 5 9 6 7 discloses a battery control device that improves engine startability at low temperatures.
- Battery according to the battery first temperature predicted value SOC setting means for setting the SOC, SOC detection means for detecting the SOC of the battery, and control means for controlling charging / discharging of the battery so that the SOC detection value of the battery becomes the SOC setting value.
- the temperature predicting means predicts the temperature of the battery at the next engine start based on the detected outside air temperature at the previous engine start. According to this battery control apparatus: Even when the temperature of the battery is low at the next engine start, an output necessary for starting the engine can be obtained.
- the present invention has been made to solve such problems, and its purpose is to predict the optimal predicted storage temperature according to each vehicle, thereby restarting the vehicle system after stopping. It is an object to provide a charge / discharge control device and a charge / discharge control method for a power storage device that are reliably performed.
- a charge / discharge control device for a power storage device that is mounted on a vehicle and configured to be chargeable / dischargeable, and includes an outside air temperature acquisition unit that acquires an outside air temperature of the vehicle, and an outside air temperature acquisition unit Therefore, the temperature of the power storage device at the time when an idling-on command for restarting the vehicle system is given based on the outside air temperature thus obtained.
- Predicted storage temperature acquisition means for acquiring a predicted storage temperature that is a predicted value of the degree.
- the predicted power storage temperature acquisition means stores the predicted power storage temperature in association with the outside air temperature, and the charge / discharge control device of the power storage device acquires the actual power storage temperature that is the actual value of the temperature of the power storage device.
- the predicted storage temperature acquisition unit Learning means for updating the correspondence relationship between the outside air temperature and the predicted power storage temperature.
- the predicted power storage temperature acquisition means determines the temperature of the power storage device at the time when the ignition on command for restarting the vehicle system is given based on the outside air temperature acquired by the outside air temperature acquisition means. Get the predicted storage temperature, which is the predicted value.
- the learning means is based on the error between the predicted power storage temperature acquired in advance by the predicted power storage temperature acquisition means and the actual power storage temperature at the time when the ignition-on command is given. Update the correspondence between temperature and predicted storage temperature. By repeatedly executing such processing by the learning means, the correspondence between the outside air temperature and the predicted storage temperature is optimized for each vehicle. For this reason, it is possible to predict the optimum predicted storage temperature at the time when a command for restarting the vehicle system is given based on the outside air temperature.
- the learning means is configured so that a calculated value obtained by an arithmetic expression including the predicted power storage temperature and the actual power storage temperature is correlated with the outside air temperature used to acquire the predicted power storage temperature. Update.
- the charge / discharge control device of the power storage device is configured so that the SOC acquisition means for acquiring the SOC of the power storage device and the SOC acquired by the SOC acquisition means are within a predetermined control range based on the predicted power storage temperature. And charge / discharge control means for controlling the charge / discharge amount of the power storage device.
- the predicted power storage temperature acquisition unit sequentially acquires the predicted power storage temperature during operation of the vehicle system.
- the charge / discharge control means further includes SOC conversion means for performing charge / discharge control by converting the SOC acquired by the SOC acquisition means into a control SOC according to the predicted storage temperature.
- the vehicle includes an engine configured to be capable of driving a power generation means for charging the power storage device, and the engine is configured to be started by the discharged power from the power storage device.
- the charge / discharge control means operates the engine so that the SOC is within a predetermined control range ⁇ if the SOC is not within the predetermined control range at the time when the ignition-off command is given. Including engine operating means.
- the predicted power storage temperature acquisition means includes a predicted power storage temperature map in which a plurality of predicted power storage temperatures are stored using the outside air temperature as a parameter.
- the predicted power storage temperature map includes the time period when the ignition-off command is given in addition to the outside air temperature, the actual power storage temperature at the time when the immediately preceding ignition-on command is given, and the operation of the vehicle system. It also has at least one of the durations as a parameter.
- a charge / discharge control device for a power storage device that is mounted on a vehicle and configured to be chargeable / dischargeable, an outside air temperature acquisition unit that acquires an outside air temperature of the vehicle, and a temperature of the power storage device
- the actual power storage temperature acquisition unit that acquires the actual power storage temperature, which is the actual power value
- a control device that includes a storage unit. Based on the outside air temperature obtained by the outside air temperature obtaining unit, the control device obtains a predicted electricity storage temperature that is a predicted value of the electricity storage device temperature at the time when an ignition 'command for restarting the vehicle system is given.
- the storage unit stores the predicted power storage temperature in association with the outside air temperature
- the control device further stores the predicted power storage temperature acquired in advance and the actual power storage at the time when the ignition-on command is given. Based on the error from the temperature, the correspondence relationship between the outside temperature stored in the storage unit and the predicted storage temperature is updated.
- a charge / discharge control method for a power storage device that is mounted on a vehicle and configured to be chargeable / dischargeable, the step of acquiring an outside air temperature of the vehicle, and the acquired outside air temperature Is a predicted value of the temperature of the power storage device at the time when an ignition-on command for restarting the vehicle system is given with reference to the correspondence relationship stored in advance between the predicted power storage temperature and the outside air temperature.
- a step of acquiring the predicted storage temperature a step of acquiring the actual storage temperature that is the actual value of the temperature of the power storage device, a predicted storage temperature that is acquired in advance, and a time when an ignition on command is given Updating a correspondence relationship stored in advance between the predicted power storage temperature and the outside air temperature based on an error from the actual power storage temperature.
- FIG. 1 is a schematic configuration diagram of a vehicle equipped with a charge / discharge control device for a power storage device according to Embodiment 1 of the present invention.
- FIG. 2 is a diagram showing an example of a predicted battery temperature map.
- FIG. 3 is a diagram showing an overall processing flow of the charge / discharge control device for the power storage device according to the first embodiment of the present invention.
- FIG. 4 is a diagram for explaining a change in the control range of the charge / discharge control based on the predicted battery temperature.
- Fig. 5 shows the process flow of the learning process subroutine.
- FIG. 6 is a diagram for explaining the temporal change in the predicted battery temperature accompanying the execution of the learning process. .
- FIG. 7 is a diagram for explaining the update of the predicted battery temperature in the predicted battery temperature map accompanying the execution of the learning process.
- FIG. 8 is a diagram showing an example of a predicted battery temperature map according to the first modification of the first embodiment of the present invention.
- FIG. 9 is a diagram showing an example of a predicted battery temperature map according to the second modification of the first embodiment of the present invention.
- FIG. 10 is a diagram showing an example of a predicted battery temperature map according to the third modification of the first embodiment of the present invention.
- FIG. 11 is a diagram showing an overall processing flow of the charge / discharge control device for the power storage device according to the second embodiment of the present invention.
- FIG. 1 2 A and Fig. 1 2 B are diagrams for explaining the conversion from the SOC (actual value) of the secondary battery to the control SOC.
- FIG. 13 is a diagram showing a processing flow of the SOC conversion subroutine.
- FIG. 14 is a diagram showing an overall processing flow of the charge / discharge control device for the power storage device according to the third embodiment of the present invention.
- FIG. 15 is a diagram showing a processing flow of the shirt down control subroutine.
- FIG. 16 shows an overall process flow of the charge / discharge control device for the power storage device according to the fourth embodiment of the present invention.
- a vehicle 100 includes a secondary battery BAT, system relays SR 1 and SR 2, a PCU (Power Control Unit) 8, a motor generator (MG) 10 and an engine 9 And a power split mechanism 11.
- SR 1 and SR 2 system relays SR 1 and SR 2
- PCU Power Control Unit
- MG motor generator
- the secondary battery BAT is an assembled battery constructed by connecting a plurality of battery modules in which a plurality of battery cells are integrated in series, and includes, for example, a lithium ion battery or a nickel metal hydride battery. Secondary battery BAT has its positive and negative electrodes connected to PCU 8 via system relays SR 1 and SR 2, respectively, and its charge / discharge amount (charge amount and discharge amount) is controlled by PC U 8 Is done.
- the PCU 8 converts the DC power (discharge power) supplied from the secondary battery BAT into AC power when the vehicle 100 is running, and supplies it to the motor generator 10. On the other hand, during regenerative braking of the vehicle 100, the AC power generated by the motor generator 10 is converted into direct current power (charging power) and supplied to the secondary battery BAT, thereby recovering the kinetic energy of the vehicle 100 as electrical energy. .
- the PCU8 has a step-up / down converter (DC / DC converter) that boosts the DC voltage supplied from the secondary battery BAT and steps down the DC voltage supplied from the motor generator 10. May be included.
- regenerative braking here refers to foot blurring by the driver of the hybrid vehicle. Including braking with power generation braking when there is a brake operation and foot brake operation, including decelerating (or stopping acceleration) while power generation braking is performed by turning off the accelerator pedal while driving .
- the motor generator 10 ′ is, for example, a three-phase AC rotating electric machine, receives AC power supplied from the PCU 8, functions as an electric motor, and generates driving force for running the vehicle 100, while the engine 9 Alternatively, it receives a driving force transmitted from a wheel (not shown) and functions as a generator, and generates electric power for charging the secondary battery BAT from the kinetic energy of the vehicle 100. That is, the motor generator 10 is configured to be driven by the engine 9.
- Engine 9 generates driving force by burning fuels such as gasoline, light oil, and methanol.
- the engine 9 supplies the generated driving power to the wheels (not shown) or the motor generator 10 via the power split mechanism 11.
- the power split mechanism 11 is a device that transmits and receives driving force between the motor generator 10, the engine 9, and wheels (not shown), and includes, for example, a single pinion type planetary gear device.
- motor generator 10 when engine 9 is started, motor generator 10 receives driving power from secondary battery BAT and generates driving force, so that engine 9 Is cranked (rotation driven). As engine 9 is cranked, fuel is injected and ignited to establish engine 9 self-sustaining rotation. Such cranking of the engine 9 by the motor generator 10 is realized by operating the power split mechanism 11 so as to transmit the driving force by the motor generator 10 to the engine 9.
- the discharge power from the secondary battery BAT is used to generate the driving force by the motor generator 10, while the charge power to the secondary battery BAT is from the engine 9 by the motor generator 10. Generated by receiving driving force or kinetic energy of vehicle 100. That is, the charge / discharge control for the secondary battery B AT is realized as an adjustment operation of the discharge power and the charge power by the control of the motor generator 10 (or P C U 8) and the engine 9.
- the vehicle 1 0 0 includes a control device 1, a voltage measurement unit 1 2, a current measurement unit 14, A battery temperature measurement unit 16, an outside air temperature measurement unit 18, and an engine ECU 7 are provided.
- the control device 1 includes a voltage measuring unit 12 that measures the actual voltage Vb of the secondary battery BAT, a current measuring unit 14 that measures the actual current 'Ib of the secondary battery BAT, and the actual battery temperature of the secondary battery BAT.
- a battery temperature measuring unit 16. for measuring Tb is connected.
- the control device 1 is a SOC (State Of Charge) that sequentially indicates the remaining capacity of the secondary battery BAT based on the actual voltage Vb, the actual current Ib, and the actual battery temperature Tb of the secondary battery BAT. To get.
- SOC State Of Charge
- the controller 1 uses the actual voltage Vb (open circuit voltage value) in the open circuit state.
- the SOC is detected sequentially by adding the provisional SOC calculated from) and the corrected SOC calculated from the accumulated value of the actual current Ib.
- the control device based on SO C of the detected secondary battery BAT, and calculates discharge allowable power Wo ut and charge allowable power W i n. Discharge allowable power Wout and charge allowable power Win are short-term limits of discharge power and charge power at each point of time specified by their chemical reaction limits.
- control device 1 is configured to receive an ignition-off command I GOFF for stopping the vehicle system and an ignition-on command I GON for starting the vehicle system.
- the vehicle system referred to here includes each device constituting the vehicle 100 including the engine 9, and particularly includes a device that operates directly or indirectly with the electric power from the secondary battery BAT.
- the control device 1 is also connected to an outside air temperature measurement unit 18 that measures the outside air temperature T out of the vehicle 100. Then, based on the outside air temperature T ou measured by the outside air temperature measuring unit 18, the control device 1 determines the battery temperature of the secondary battery BAT at the time when the ignition on command I GON is given to restart the vehicle system. Prediction: Get the predicted battery temperature #Tb.
- control device 1 determines the predicted battery temperature #Tb during operation of the vehicle system. It is obtained sequentially, and the charge / discharge amount for the secondary battery BAT is controlled so that the SOC of the secondary battery BAT is within a predetermined control range based on the predicted battery temperature #Tb. Specifically, the control device 1 gives a control command to the PCU 8 to control the discharge amount of the secondary battery BAT, and also controls the driving force generated by the engine 9 via the engine ECU 7. The engine ECU 7 controls the driving force (or the number of revolutions) generated by the engine 9 by adjusting the amount of fuel supplied to the engine 9 according to the control command from the control device 1.
- control device 1 When the control device 1 receives the ignition command IGON, the control device 1 activates the system relay commands SRC 1 and SRC 2 and drives the system relays SR 1 and SR 2 to turn on the secondary battery BAT. And P.CU 8 are electrically connected. On the other hand, when the control device 1 receives the ignition off command I GO FF, the control device 1 deactivates the system relay commands SRC 1 and SRC 2 and turns off the system relays SR 1 and SR 2 respectively (system shirt down). )
- the control device 1 is composed of, for example, an ECU (Electrical Control Unit) and the like, and includes a RAM (Random Access Memory) 4, a predicted battery temperature map 5, and a CPU (Central Processing Unit) 6.
- ECU Electronic Control Unit
- RAM Random Access Memory
- CPU Central Processing Unit
- the CPU 6 executes various processes in the control device 1 described above according to programs and maps stored in the RAM 4 in advance. Then, the CPU 6 stores the data obtained as a result of the execution in the RAM 4.
- Estimated battery temperature map 5 is for example EE PROM (Electrical Erasable and
- the predicted battery temperature map 5 stores a plurality of predicted battery temperatures #Tb using the outside air temperature T o u t as a parameter. Then, the CPU 2 refers to the predicted battery temperature map 5 and acquires the predicted battery temperature #T b corresponding to the outside air temperature Tout acquired from the outside air temperature measuring unit 18.
- predicted battery temperature map 5 stores predicted battery temperature #Tb in association with outside air temperature T 0 ut.
- Fig. 2 shows an example where the outside air temperature T out force is specified in increments of 5 [° C] 'in the range of 30 [° C] to 30 [° C].
- the predicted battery temperature map 5 may be configured in consideration of the accuracy of charging / discharging control of the secondary battery BAT to be used and the usage environment.
- the predicted battery temperature #T b stored in the predicted battery temperature map 5 stores the value obtained experimentally in advance as the initial force value that is updated as the learning process is executed. It may be done.
- the CPU 6 stores in the predicted battery temperature map 5 based on the error between the predicted battery temperature #Tb acquired in advance and the outside air temperature T out at the time when the ignition ON command I GON is immediately given.
- the correspondence relationship between the outside air temperature Tout and the predicted battery temperature #Tb is updated (learning process). Specifically, the calculated value obtained by the calculation formula including the predicted battery temperature #Tb and the outside air temperature Tout is used to obtain the predicted battery temperature #Tb (the parameter is the outside air). Update the value in the predicted battery temperature map 5 so that it is associated with the temperature Tout.
- control device 1 corresponds to a “charging / discharging control device of a power storage device”.
- CPU 6 realizes ⁇ outside air temperature acquisition means '', ⁇ actual storage temperature acquisition means '', ⁇ learning means '' and ⁇ charge / discharge control means '', and CPU 6 and predicted battery temperature map 5 "Acquisition means”.
- the predicted battery temperature #Tb corresponds to the “predicted storage temperature”
- the actual battery temperature Tb corresponds to the “actual storage temperature”
- the predicted battery temperature map 5 corresponds to the “predicted storage temperature map”.
- the CPU 6 determines whether or not the ignition on command IGON is given (step S2). If the ignition on command I GON has not been given (NO in step S2), the CPU 6 waits until the ignition command I G ON is given (step S2).
- the CPU 6 executes a learning processing subroutine (step S4). Then, the CPU 6 activates the system relay commands SRC 1 and SRC 2 and drives the system relays SRI and SR2 to ON (step S6).
- the CPU 6 acquires the outside air temperature T out from the outside air temperature measuring unit 18 (the Step S8) Referring to the predicted battery temperature map 5, the predicted battery temperature #Tb corresponding to the outside air temperature Tout obtained in Step S8 is acquired (Step S10). Further, the CPU 6 stores the predicted battery temperature #Tb obtained in step S10 in RAM4 (step S12).
- the CPU 6 obtains the SOC of the secondary battery BAT based on the actual voltage Vb, the actual current lb, the actual battery temperature Tb, etc. of the secondary battery BAT (step S14). Then, the CPU 6 determines a control range for executing charge / discharge control for the secondary battery B AT based on the acquired predicted battery temperature #T b (step S 16). Further, the CPU 6 controls the charge / discharge amount of the secondary battery BAT so that the SOC of the secondary battery BAT is within the control range determined in step S16 (step S18).
- step S20 the CPU 6 determines whether or not an ignition-off command IG OF F is given. If the ignition off command I GO FF is not given (NO in step S20), the CPU 6 repeatedly executes the above-described steps S8 to S20.
- step S20 When the ignition off command I GO FF is given (YES in step S20), the CPU 6 deactivates the system relay commands SRC 1 and SRC2, and the system relays SR 1 and SR 2 is turned off (step S24), and the process is terminated.
- the CPU 6 sequentially acquires the predicted battery temperature #Tb during the operation of the vehicle system after being given the ignition ON command IG ON (step S10). Since it is impossible to predict at which point (processing timing) the ignition-off command I GO FF command can be given, ⁇ is given the ignition-off command IGOFF at the timing of V and deviation. However, charge / discharge control for the secondary battery BAT is performed to ensure that the vehicle system can be restarted.
- the CPU 6 charges and discharges so that the SOC of the secondary battery BAT is within the specified control range. Electric control is performed.
- the control range related to charge / discharge control is defined by the charge / discharge control upper limit value and the charge / discharge control lower limit value set to include the control center value Sc. Then, the CPU 6 changes the charge / discharge control lower limit value based on the obtained predicted battery temperature #Tb.
- the CPU 6 performs charge / discharge control in the range from the control lower limit value S 1 to the control upper limit value Sh, When the temperature #Tb is lower than the low temperature prediction threshold Tb— 1 ow, the charge / discharge control lower limit value is changed to a value higher than the control lower limit value S 1. In this manner, the CPU 6 ensures that the vehicle system can be restarted by maintaining the SOC of the secondary battery BAT in a higher range.
- the charge / discharge control lower limit value may be changed to a value higher than the normal control lower limit value S] according to the operation of the driver or the like.
- charge / discharge control can be changed with a relatively high degree of freedom when an unusual driving pattern such as a trip to a cold region is executed.
- step S4 in FIG. 3 the learning processing subroutine processing
- the CPU 6 predicts the predicted battery temperature #T b based on the error between the previously acquired predicted battery temperature #T b and the outside air temperature T out at the time when the immediately subsequent ignition ON command I GON is given.
- the correspondence relationship between the outside temperature T out stored in the temperature map 5 and the predicted battery temperature #T b is updated.
- the vehicle system stop period is also approximated, so the actual battery temperature T b after the ignition-off command IGON is given again after the ignition-off command IGOFF is given T b
- the temperature drop characteristic of the curve also shows a relatively approximate tendency.
- a plurality of predicted battery temperatures #Tb stratified by the outside air temperature Tout that affects the value of the actual battery temperature Tb are determined as the predicted battery temperature. While storing in Map 5, the stored predicted battery temperature #Tb is corrected so that the predicted battery temperature #Tb matches the actual battery temperature Tb.
- the processing flow of the learning processing subroutine will be described with reference to FIG. First, the CPU 6 determines whether or not the predicted battery temperature #Tb is stored in the RAM 4 (step S 1 00). If the predicted battery temperature #Tb is not stored in RAM4 (NO in step S1.00), CPU 6 returns to the original process.
- step S1 0 2 When the estimated battery temperature #Tb is stored in RAM4 (in the case of YES in step S1 00), CPU 6 reads the estimated battery temperature #Tb from RAM4 (step S1 0 2). Note that if the predicted battery temperature #T b read from RAM4 exceeds the specified range, the subsequent battery temperature map 5 is not updated with an abnormal value. You can configure to interrupt the process and return to the original process.
- the CPU 6 has obtained the predicted battery temperature #T b stored in the predicted battery temperature map 5 and updates the corrected predicted battery temperature #T b—NEW (step S 1 0). 8). CPU 6 then returns to the original process.
- FIG. 6 the time of the predicted battery temperature #T b corresponding to the specific outside temperature T out of the predicted battery temperature map 5 (for example, when the outside temperature T out is 0 [° C] in FIG. 2). It shows an example of the change.
- the vehicle system according to the present embodiment repeats stop and start in response to an alternate-off instruction IGOFF and an on-idition instruction IGOON.
- the ignition off command I GO FF is given. It is assumed that the outside air temperature Tout at the obtained time (time t1, t3, t5) is substantially constant (for example, 0 [° C]). '
- the CPU 6 When the first ignition-off command I GOFF (1) is given at the time tl, the CPU 6 refers to the predicted battery temperature map 5 and refers to the predicted battery temperature T out at the time t 1. Get #Tb (1). Thereafter, when the first ignition-on command I G ON (1) is given at time t 2, the CPU 6 acquires the actual battery temperature T b (1) at time t 2. Then, the CPU 6 calculates the corrected predicted battery temperature #T b — after the first ignition on command IG ON (1) from the predicted battery temperature #Tb (1) and the actual battery temperature Tb (1). Calculate NEW (1). Further, in the predicted battery temperature map 5, the CPU 6 updates the value corresponding to the outside air temperature T out at the time t 1 to the corrected predicted battery temperature # Tb—NEW (1).
- the CPU 6 refers to the predicted battery temperature map 5 and corresponds to the outside air temperature To ut at time t 3. Get the predicted battery temperature #Tb (2).
- the value corresponding to the outside air temperature To ut in the predicted battery temperature map 5 has been updated to the predicted battery temperature #T b—NEW (1), so the predicted battery temperature #Tb (2) Temperature # Tb—matches NEW (1).
- the CPU 6 acquires the actual battery temperature Tb (2) at time t4. Then, the CPU 6 calculates the predicted predicted battery temperature #Tb after the correction for the second Ignition On 'command I GON (2) from the predicted battery temperature #T b (2) and the actual battery temperature Tb (2). — Calculate NEW (2). Further, the CPU 6 updates the value corresponding to the outside air temperature Tout at the time t3 in the predicted battery temperature map 5 to the corrected predicted battery temperature #Tb_NEW (2).
- the predicted battery temperature #Tb stored in the predicted battery temperature map 5, that is, the corrected predicted battery temperature #Tb NEW, is It is corrected in the direction that matches the pond temperature Tb.
- the predicted battery temperature map is used for easy understanding.
- the time change was illustrated as an example, but in actuality, the time point when the ignition off command I GO FF is given
- the learning process is executed independently for the outside air temperature T out unit (stratified unit) defined in the predicted battery temperature map 5.
- FIG. 7 is a diagram showing the predicted battery temperature #Tb stored in the predicted battery temperature map 5 with the outside air temperature Tout as a parameter on the horizontal axis.
- the predicted battery temperature map 5 stores a plurality of predicted battery temperatures #Tb in association with the specified outside air temperature T out (by layer). As described above, learning control is performed independently for each outside air temperature unit (stratified unit). Therefore, in each execution of learning control, one learning air temperature Tout is associated with one of the outside air temperatures Tout.
- the predicted battery temperature #Tb is sequentially updated.
- Embodiment 1 of the present invention by obtaining the predicted battery temperature #Tb corresponding to the acquired outside air temperature Tout, the SOC of the secondary battery BAT is charged so as to be within a predetermined control range ⁇ . While the discharge control is executed, the predicted battery temperature map 5 based on the error between the predicted battery temperature #Tb acquired in advance and the actual battery temperature Tb at the time when the ignition ON command I GON was given. Is updated to the predicted battery temperature #T b—NEW.
- the predicted battery temperature #Tb stored in the predicted battery temperature map 5 can be updated to ⁇ : adapted to each vehicle. Therefore, it is possible to predict the optimum predicted battery temperature according to each vehicle, and it is possible to realize a charge / discharge control device for a power storage device for surely restarting after stopping the vehicle system.
- restart after stopping the vehicle system is ensured. Therefore, it is not necessary to make the rechargeable battery BAT's rechargeable capacity excessively large in preparation for a temperature drop at restart. Therefore, when determining the capacity of the secondary battery BAT, it is not necessary to consider the dischargeable amount at the time of restart, and the capacity of the secondary battery BAT can be determined by paying attention only to the power performance of the vehicle. Therefore, it is possible to realize a vehicle in which the capacity of the mounted secondary battery BAT is optimized.
- the stop period and stop time period of the vehicle system are different between going to work and returning home, so even if the outside air temperature Tout is approximately the same, The actual battery temperature Tb at the time of restart may be different.
- the vehicle system when going to work (for example, in the morning), the vehicle system is in a stopped state after being given an id-off command I GO F F when leaving the day before (for example, in the evening).
- the vehicle system is stopped after the ignition-off command IGOFF is given at the time of working at sunrise (for example, in the morning).
- the predicted battery temperature map 5A that stores the predicted battery temperature #Tb in association with the time zone in which the turn-off command I GO FF is given.
- the predicted battery temperature map 5 A uses, as a parameter, the time zone (for example, morning, afternoon, evening and late night / early morning) when the OFF command I GOFF is given in addition to the outside air temperature T out. Stores estimated battery temperature #Tb. If the predicted battery temperature map 5 A is used for a vehicle used for commuting as described above, when the official turn-off command I GO FF is given when leaving work, the outside air temperature at that time Charge / discharge control is performed according to the predicted battery temperature #Tb defined by T out and the “evening” time zone.
- the time zone for example, morning, afternoon, evening and late night / early morning
- the outside air temperature Tout at that time Charge / discharge control is performed according to the predicted battery temperature #T defined by the “previous time zone”.
- the learning process described above is executed separately for each time period, the results of the learning process are clearly distinguished and reflected at the time of going to work and leaving work.
- stratification by weekdays, days before holidays, and holidays may be added.
- the effect of the learning process can be obtained for each time zone.
- the operation patterns it is possible to learn the predicted battery temperature for each operation pattern.
- the actual battery temperature Tb of the secondary battery BAT when the immediately preceding ignition-off command IGOFF is given may be used.
- the predicted battery temperature map 5B shows the actual battery temperature Tb of the secondary battery BAT at the time when the previous ignition-off command IGOFF was given in addition to the outside air temperature Tout.
- the actual battery temperature T at the time when the immediately preceding ignition-off command IGOFF is given. Since the effect of the learning process can be obtained separately for b, when there are a plurality of driving patterns for the same vehicle, the predicted battery temperature can be learned for each driving pattern.
- predicted battery temperature map 5 C stores predicted battery temperature #T b using the operating time of the vehicle system as a parameter in addition to outside air temperature T out.
- the duration of operation of the vehicle system is obtained by measuring the time from when the previous ignition on command I G ON was received to the present.
- the effect of the learning process can be obtained according to the operation duration time of the vehicle system. Therefore, when there are a plurality of driving patterns for the same vehicle, it is possible to learn the predicted battery temperature for each driving pattern.
- a three-dimensional or four-dimensional predicted battery temperature map obtained by further combining the parameters described in the first to third modifications of the first embodiment of the present invention may be used. Further, in addition to the parameters described above, the parameters of “re” and “deviation” may be used as long as they can identify a plurality of operation patterns.
- the second embodiment of the present invention is obtained so that the present invention can be applied to an existing system without changing the charge / discharge control lower limit value.
- charge / discharge control is performed by converting S0C of secondary battery BAT to S0C for control. That is, when it is necessary to change the charge / discharge control lower limit value to a higher value, instead of changing the charge / discharge control lower limit value, the actual value S0 C in the secondary battery BAT is indicated as a lower value. Converting to SOC for control causes virtually the same effect.
- the charge / discharge control device for a power storage device according to the second embodiment of the present invention is similar to the charge / discharge control device for the power storage device according to the first embodiment of the present invention shown in FIG. 1, and therefore, detailed description thereof will not be repeated.
- the CPU 6 implements “SOC conversion means”.
- Step S 16 # the CPU 6 executes a SOC conversion subroutine.
- the CPU 6 converts the SOC of the secondary battery BAT acquired in step S14 into a control SOC (hereinafter also referred to as #SOC) according to the predicted battery temperature #Tb acquired in step S10. . Further, the CPU 6 controls the charge / discharge amount of the secondary battery BAT so that #SOC (control SOC) converted in step S16 # is within a predetermined control range (step S18 #). .
- #SOC control SOC
- FIGS. 12A and 12B are diagrams for explaining the conversion of the secondary battery BAT from SOC (actual value) to # SOC (control SOC).
- SOC actual value
- CPU 6 determines the S OC conversion function (for example, 300 conversion function? 0 (X) or F l (x)) according to the estimated battery temperature #Tb to be acquired. Then, the SOC (actual value) is converted to #SOC (control SOC) by the conversion function.
- SOC conversion function for example, 300 conversion function? 0 (X) or F l (x)
- CPU6 matches # SOC (control SOC) with SOC (actual value) Select the SOC conversion function FO (X) to be generated. Then, charge / discharge control based on # SOC (control SOC) matches the result of charge / discharge control based on SOC (actual value).
- charge / discharge control of #SOC (SOC for control) within the range of the control lower limit value S 1 to the control upper limit value S h means that the SOC (actual value) is controlled from the control lower limit value # S 1 (T 1) to the control upper limit value. This is substantially equivalent to charge / discharge control within the range of value S h.
- the charge / discharge control device for a power storage device substantially changes the charge / discharge control range according to predicted battery temperature #T b, and further increases the SOC of secondary battery BAT. Maintain high range.
- the vehicle system can be reliably started by limiting the lower limit of the charge / discharge control range of the secondary battery ⁇ AT higher.
- the CPU 6 determines an appropriate SOC conversion function according to the obtained predicted battery temperature #T b, and changes the SOC (actual value) to # SOC (control SOC) by the SOC conversion function. Convert.
- the CPU 6 determines a SOC conversion function based on the obtained predicted battery temperature #Tb (step S200).
- the CPU 6 substitutes the obtained SOC ′ (actual value) for the determined SOC conversion function, and calculates the SOC conversion function output value F (SOC) (step S202). Then, CPU 6 determines whether or not
- / 3 is a gradual change amount. In other words, CPU6 has a gradual deviation between the current # SOC (control SOC) and the SOC conversion function output value F (SOC) so that #SOC (control SOC) does not change significantly instantaneously. Determine whether the variable is less than 3.
- step S208 CPU 6 changes # SOC (control SOC) based on which of the current #SOC (control SOC) and SOC conversion function output value F (SOC) is larger. Judging. Then, the CPU 6 changes # SOC (control SOC) gradually by the following steps.
- step S 208 If YES, the CPU 6 sets the value obtained by adding the gradual variable 3 to the current #SOC (control SO C) as the new #SOC (control S0C) (stitch S 2 1 0 ) Then, the CPU 6 returns to the original process.
- the configuration in which the CPU 6 automatically determines the SOC conversion function based on the obtained predicted battery temperature #Tb has been described.
- the operation is more severe due to the operation of the driver or the like. It may be configured to forcibly determine the SOC conversion function in the direction (the direction in which the predicted battery temperature #Tb is low) or in the looser direction (the direction in which the predicted battery temperature #Tb is high).
- the obtained SOC is reduced to a lower SOC by the SOC conversion function determined according to the expected battery temperature #Tb.
- charge / discharge control is executed.
- the control lower limit value S 1 can be limited to a substantially higher range without directly changing the control lower limit value S] that defines the SOC charge / discharge control range. Therefore, the present invention can be applied without affecting other controls and functions that use the control lower limit S 1.
- the predicted battery temperature #Tb is sequentially acquired during operation of the vehicle system, and the SOC of the secondary battery BAT is determined based on the predicted battery temperature #Tb.
- the configuration for controlling the charge / discharge amount of the secondary battery BAT so as to be within the range has been described.
- Embodiment 3 of the present invention when the regeneration-off command I GO FF is given, if the SOC of the secondary battery BAT is not within the predetermined control range ⁇ , the operation of the engine is continued. explain.
- the charge / discharge control device for a power storage device according to the third embodiment of the present invention is similar to the charge / discharge control device for the power storage device according to the first embodiment of the present invention shown in FIG. 1, and therefore, detailed description thereof will not be repeated.
- the CPU 6 implements “engine operating means”.
- FIG. 14 an overall process flow of the charge / discharge control device for the power storage device according to the third embodiment of the present invention will be described.
- the overall process flow of the charge / discharge control device of the power storage device according to the third embodiment of the present invention shown in FIG. 14 is the same as the overall process flow of the charge / discharge control device of the power storage device according to the first embodiment of the present invention shown in FIG. Steps S8 to S18 are deleted, and Steps S30, S32, S34, S36, and S38 are added.
- step S 6 the CPU 6 determines whether or not an idling-off command I GO F F has been given (step S 20). If the turn-off command I GO F F has not been given (NO in step S 20), the CPU 6 waits until the turn-off command I GO F F is given (step S 20).
- the CPU 6 acquires the outside air temperature T 0 ut from the outside air temperature measuring unit 18 (step S 3 ⁇ ) Referring to the predicted battery temperature map 5, the predicted battery temperature #Tb corresponding to the outside air temperature Tout acquired in step S3 is obtained (step S32). Further, the CPU 6 stores the predicted battery temperature #Tb acquired in step S32 in the RAM 4 (step S34). The CPU 6 obtains the SOC of the secondary battery BAT based on the actual voltage Vb, actual current Ib, actual battery temperature Tb, etc. of the secondary battery B B ⁇ (step S36).
- step S38 the CPU 6 executes a shutdown control subroutine. That is, if the SOC of the secondary battery BAT ′ is not within the predetermined control range, the CPU 6 operates the engine 9 so that the SOC is within the predetermined control range. Then, after the SOC of the secondary battery BAT falls within the predetermined control range, the CPU 6 causes the vehicle system to shut down.
- the shutdown control subroutine step S 3 S
- the CPU 6 sends a system relay command SRC 1, SRC 2 is deactivated, system relays SRI and SR2 are turned off (step S24), and the process is terminated.
- steps S30 to S36 in the overall process flow of the charge / discharge control device for a power storage device according to the third embodiment of the present invention described above are the charge / discharge of the power storage device according to the first embodiment of the present invention shown in FIG. This is the same processing as steps S8 to S14 in the overall processing flow of the control device.
- the CPU 6 If it is determined that the secondary battery BAT has not been charged to such an extent that the vehicle system can be reliably restarted when the idling off command I GO FF is given, the CPU 6 operates the engine 9, After the secondary battery BAT is charged with the generated power from the motor generator 10 within a predetermined control range, the vehicle system is stopped. In this way, the vehicle system can be reliably restarted by charge / discharge control of the secondary battery BAT.
- the CPU 6 determines whether or not the SOC (actual value) of the secondary battery BAT exceeds the charge / discharge control lower limit value (step S 300.).
- step S 300 If the SOC (actual value) does not exceed the charge / discharge control lower limit value (NO in step S300), CPU 6 gives command to engine ECU 7 to activate engine 9 (step S). 302). Note that if the engine 9 is stopped at the time when the engine turn-off command I GO F F is given, the CPU 6 starts the engine 9. Then, the CPU 6 controls the amount of power generated by the motor generator 1.0 based on the SOC (actual value) of the secondary battery BAT so as not to exceed the chargeable power W i n (step S 304).
- CPU 6 obtains the SOC (actual value) of secondary battery BAT (step S306). And CPU 6 again, SOC (actual value) is the lower limit of charge / discharge control It is determined whether or not the value is exceeded (step S300).
- step S 3 10 the CPU 6 gives a command to engine ECU 7 to stop engine 9 (step S 3 10). Then, the CPU 6 causes the other devices constituting the vehicle system to execute a shutdown process (step S 3 1 2). Thereafter, CPU 6 returns to the original process.
- the CPU 6 confirms that the secondary battery BAT is charged to such an extent that the vehicle system can be reliably restarted, and then turns the vehicle system off. Stop.
- the third embodiment of the present invention in addition to the effect in the first embodiment, when the SOC of the secondary battery BAT is outside the charge / discharge control range at the time when the ignition off command IGOFF is given, Start engine 9 and charge secondary battery BAT. As a result, even if the SOC force S of the secondary battery B AT when the idling-off command I GOF F is given, the value of the deviation can be reliably restarted after the vehicle system stops.
- You may comprise so that all the processes which concern on each subroutine illustrated to Embodiment 1-3 of the above-mentioned this invention may be included.
- the charge / discharge control device for a power storage device according to the fourth embodiment of the present invention is similar to the charge / discharge control device for the power storage device according to the first embodiment of the present invention shown in FIG. 1, and therefore, detailed description thereof will not be repeated.
- the overall processing flow of the charge / discharge control device for a power storage device according to the fourth embodiment of the present invention shown in FIG. 16 is the entire process of the charge / discharge control device for the power storage device according to the first embodiment of the present invention shown in FIG.
- steps S 1 6 # and S 1 8 # are arranged in place of steps S 16 and S 18, and step S 38 is added.
- Steps S 1 6 # and S 1 8 # and the SOC conversion subroutine have been described in detail in the above-described second embodiment of the present invention, and thus detailed description will not be repeated.
- Step S 38 and the control subroutine have been described in detail in the above-described third embodiment of the present invention, and thus detailed description will not be repeated.
- the same processing is executed in the preceding steps (steps S 8 to S 14).
- the indicated steps S 30, S 3 2, S 3 4, S 3 6 can be omitted.
- Embodiment 4 of the present invention the effects in Embodiments 1 to 3 can be obtained simultaneously.
- the vehicle equipped with the charge / discharge control device for a power storage device according to the present invention has been described.
- the present invention is affected by a temperature change. Any secondary battery can be applied to any device or system.
- a predicted battery temperature map storing a plurality of predicted battery temperatures #Tb associated with the outside air temperature Tout is used.
- the predicted battery temperature #Tb may be calculated continuously by an arithmetic expression using the outside air temperature Tout as a variable.
- the constant term that defines the arithmetic expression is updated by learning control.
- Embodiments 1 to 4 of the present invention the configuration in which the charge / discharge control device for a power storage device according to the present invention is applied to a secondary battery has been described.
- the temperature characteristics are such that the power that can be supplied decreases at low temperatures.
- the present invention is not limited to the secondary battery, and can be applied to other power storage devices such as a capacitor.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Tests Of Electric Status Of Batteries (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2651141A CA2651141C (en) | 2006-05-22 | 2007-05-21 | Apparatus and method for controlling charging and discharging power storage device |
EP07744185.5A EP2020724B1 (en) | 2006-05-22 | 2007-05-21 | Accumulator charge/discharge control device and charge/discharge control method |
US12/226,530 US8078417B2 (en) | 2006-05-22 | 2007-05-21 | Apparatus and method for controlling charging and discharging power storage device |
CN2007800183886A CN101449448B (zh) | 2006-05-22 | 2007-05-21 | 蓄电装置的充放电控制装置和充放电控制方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006-141792 | 2006-05-22 | ||
JP2006141792A JP4929839B2 (ja) | 2006-05-22 | 2006-05-22 | 蓄電装置の充放電制御装置 |
Publications (1)
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WO2007136126A1 true WO2007136126A1 (ja) | 2007-11-29 |
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PCT/JP2007/060751 WO2007136126A1 (ja) | 2006-05-22 | 2007-05-21 | 蓄電装置の充放電制御装置および充放電制御方法 |
Country Status (8)
Country | Link |
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US (1) | US8078417B2 (ja) |
EP (1) | EP2020724B1 (ja) |
JP (1) | JP4929839B2 (ja) |
KR (1) | KR20090016471A (ja) |
CN (1) | CN101449448B (ja) |
CA (1) | CA2651141C (ja) |
RU (1) | RU2403663C2 (ja) |
WO (1) | WO2007136126A1 (ja) |
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EP2969688B1 (en) | 2013-03-14 | 2022-12-21 | Allison Transmission, Inc. | System and method for engine driveline disconnect during regeneration in hybrid vehicles |
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FR3041914B1 (fr) * | 2015-10-05 | 2018-07-13 | Renault S.A.S. | Procede de determination des plages d'utilisation d'une batterie de traction |
JP6562856B2 (ja) * | 2016-03-17 | 2019-08-21 | 株式会社クボタ | 多目的車両 |
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Also Published As
Publication number | Publication date |
---|---|
JP4929839B2 (ja) | 2012-05-09 |
RU2008150486A (ru) | 2010-06-27 |
CA2651141A1 (en) | 2007-11-29 |
CN101449448B (zh) | 2012-06-06 |
EP2020724A4 (en) | 2013-08-07 |
US20090099800A1 (en) | 2009-04-16 |
US8078417B2 (en) | 2011-12-13 |
EP2020724B1 (en) | 2016-06-22 |
JP2007311309A (ja) | 2007-11-29 |
KR20090016471A (ko) | 2009-02-13 |
EP2020724A1 (en) | 2009-02-04 |
CA2651141C (en) | 2013-04-23 |
CN101449448A (zh) | 2009-06-03 |
RU2403663C2 (ru) | 2010-11-10 |
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