JP2010285110A - Vehicle and method for controlling the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To more appropriately increase the temperature of a battery during the stop of the system. <P>SOLUTION: When a battery is connected to a commercial power source, and when the operation request of an air conditioner is made, and when a battery temperature Tb is less than a temperature Tref for determination (step S110), the target output P* of a charger 56 is set so that the battery alternately repeats discharging and charging (steps S130 to S180), and the air conditioner is operated with a target output Pac, and a charger 56 is controlled so that a target output P* is output from the charger 56 (step S190). Thus, it is possible to increase the temperature of the battery while suppressing the deterioration in the residual capacity (SOC) of the battery, and it is possible to appropriately increase the temperature of the battery during the stop of the system. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle and a control method thereof, and more particularly, to a vehicle including an electric motor capable of inputting and outputting driving power and a control method thereof.

  Conventionally, this type of vehicle has an engine with a diesel particulate filter (hereinafter referred to as DPF) for collecting particulate matter in the exhaust gas, and an input of driving force from the engine. There has been proposed an electric generator that generates electric power and an electric motor that is operated by the electric power from the electric generator and the electric power from the battery and outputs power to the drive wheels (for example, see Patent Document 1). In this vehicle, when regeneration of the DPF is required and the DPF is heated by the heat from the engine, the engine output is set using the time required for the DPF to reach the regeneration temperature, and power is generated by the set engine output. Calculate the amount of power generated by the machine. Then, when the battery is overcharged with the power generation amount thus calculated, the output of the engine is reduced to suppress overcharge of the battery.

JP 2007-55348 A

  Generally, an electric motor that outputs driving power, a secondary battery that supplies electric power to the electric motor, and a charging device that charges the secondary battery with electric power from an external power source when connected to an external power source that is a power source outside the vehicle When the system is stopped, the secondary battery is charged by an external power source such as a commercial power source, and when the system is started, the electric power from the secondary battery is used to drive power for traveling. Is output to start running. In such a vehicle, when the system is started in a state where the secondary battery is at a low temperature, a large amount of electric power regenerated in the secondary battery cannot be taken to suppress overcharge of the secondary battery immediately after the start of traveling. The overall energy efficiency is reduced. Therefore, it is desirable that the temperature is raised to a temperature at which the secondary battery operates well when the system is activated. On the other hand, from the viewpoint of energy efficiency, it is desirable that the amount of power stored in the secondary battery is greater when the system is activated.

  The vehicle and the control method thereof according to the present invention are mainly intended to appropriately raise the temperature of the secondary battery while the system is stopped.

  The vehicle and the control method thereof according to the present invention employ the following means in order to achieve the main object described above.

The vehicle of the present invention
A vehicle including an electric motor capable of inputting and outputting driving power,
An auxiliary machine that can be operated using electric power,
A secondary battery capable of exchanging electric power with the electric motor and outputting electric power to the auxiliary machine;
Power supply means capable of supplying power from the external power source to the secondary battery and the auxiliary device when connected to an external power source that is an external power source;
While the vehicle system is stopped, the power supply means is connected to the external power source, and the temperature of the secondary battery is preset as a lower limit of the temperature at which the secondary battery can be operated satisfactorily A discharge operation control for controlling the auxiliary device and the power supply means so that the auxiliary device is operated with discharge of the secondary battery when an operation request of the auxiliary device is made in a state where the temperature is lower than the temperature; Control means for alternately executing charging operation control for controlling the auxiliary machine and the power supply means so that the auxiliary machine is operated with charging of the secondary battery;
It is a summary to provide.

  In the vehicle of the present invention, the power supply means is connected to the external power source while the vehicle system is stopped, and the temperature of the secondary battery is preset as the lower limit of the temperature at which the secondary battery can be operated satisfactorily. Discharge operation control for controlling the auxiliary machine and power supply means so that the auxiliary machine is operated with the discharge of the secondary battery when the auxiliary machine is requested in a state where the temperature is lower than the predetermined temperature, and the secondary battery The charging operation control for controlling the auxiliary device and the power supply means is alternately executed so that the auxiliary device is operated with the charging. Since the discharge operation control and the charge operation control are alternately performed, the secondary battery can be heated while suppressing a decrease in the storage amount of the secondary battery, and more appropriately when the system is stopped. The secondary battery can be heated. Here, the “auxiliary machine” includes an air conditioner that performs air conditioning of the passenger compartment using electric power, and the “secondary battery” includes a lithium ion secondary battery.

  In such a vehicle of the present invention, the control means may be means for first executing the discharge operation control. In this way, the secondary battery can be prevented from being overcharged.

  In the vehicle of the present invention, the control means may be means for stopping the discharge operation control and the charge operation control when the temperature of the secondary battery reaches the predetermined temperature or more. . In this way, it is possible to suppress the secondary battery from being excessively heated.

  Furthermore, in the vehicle of the present invention, the control means is configured such that the power supply means is connected to the external power source while the vehicle system is stopped, and the temperature of the secondary battery is lower than the predetermined temperature. After the amount of electricity stored in the secondary battery reaches a predetermined amount of electricity stored in advance as a target value of the amount of electricity stored in the secondary battery when the vehicle system is stopped, When it is made, the discharge operation control and the charge operation control may be alternately executed.

  In the vehicle of the present invention, an internal combustion engine capable of outputting driving power, a generator capable of inputting / outputting power, a drive shaft connected to an axle, an output shaft of the internal combustion engine, and rotation of the generator Three-axis power input / output means connected to three axes of the three axes, and for inputting / outputting power to / from the remaining shafts based on power input / output to / from any two of the three axes. May be connected to the drive shaft. Here, the “three-axis power input / output means” may be a single pinion type or double pinion type planetary gear mechanism, or may be a differential gear.

The vehicle control method of the present invention includes:
An electric motor capable of inputting and outputting driving power; an auxiliary machine operable with electric power; a secondary battery capable of exchanging electric power with the electric motor and outputting electric power to the auxiliary machine; A vehicle control method comprising: a power supply unit capable of supplying power from the external power source to the secondary battery and the auxiliary machine when connected to an external power source that is a power source;
While the vehicle system is stopped, the power supply means is connected to the external power source, and the temperature of the secondary battery is preset as a lower limit of the temperature at which the secondary battery can be operated satisfactorily A discharge operation control for controlling the auxiliary device and the power supply means so that the auxiliary device is operated with discharge of the secondary battery when an operation request of the auxiliary device is made in a state where the temperature is lower than the temperature; Charging operation control for controlling the auxiliary device and the power supply means is alternately executed so that the auxiliary device is operated with charging of the secondary battery.

  In the vehicle control method of the present invention, the power supply means is connected to the external power source while the vehicle system is stopped, and the temperature of the secondary battery is set as the lower limit of the temperature at which the secondary battery can be operated satisfactorily. A discharge operation control for controlling the auxiliary device and the power supply means so that the auxiliary device is operated with the discharge of the secondary battery when an operation request of the auxiliary device is made in a state where the temperature is lower than a predetermined temperature set in advance; Charging operation control for controlling the auxiliary device and the power supply means is alternately executed so that the auxiliary device is operated with charging of the secondary battery. Since the discharge operation control and the charge operation control are alternately performed, the secondary battery can be heated while suppressing a decrease in the storage amount of the secondary battery, and more appropriately when the system is stopped. The secondary battery can be heated. Here, the “auxiliary machine” includes an air conditioner that performs air conditioning of the passenger compartment using electric power, and the “secondary battery” includes a lithium ion secondary battery.

1 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 20 as an embodiment of the present invention. It is a flowchart which shows an example of the control routine at the time of the air-conditioning action request | requirement performed by the hybrid electronic control unit 70 of an Example. It is explanatory drawing which shows an example of the time change of the air-conditioning request | requirement electric power Pac, target charging / discharging electric power Pb *, and target output P * when battery temperature Tb is more than the temperature Tref for determination. It is explanatory drawing which shows an example of the time change of the air-conditioning request | requirement electric power Pac, target charging / discharging electric power Pb *, and target output P * when battery temperature Tb is less than the temperature Tref for determination.

  Next, the form for implementing this invention is demonstrated using an Example.

  FIG. 1 is a configuration diagram showing an outline of the configuration of a hybrid vehicle 20 as an embodiment of the present invention. As shown in the figure, the hybrid vehicle 20 of the embodiment includes an engine 22 that uses gasoline or light oil as fuel, an engine electronic control unit (hereinafter referred to as an engine ECU) 24 that controls the drive of the engine 22, and an engine 22. A planetary gear 30 in which a carrier is connected to the crankshaft 26 and a ring gear is connected to a drive shaft 36 connected to drive wheels 38a and 38b via a differential gear 37, and a rotor is configured as a planetary gear, for example, as a synchronous generator motor. A motor MG1 connected to 30 sun gears, a motor MG2 configured as a synchronous generator motor and having a rotor connected to the drive shaft 36, inverters 41 and 42 for driving the motors MG1 and MG2, and an inverter 41 42, switching elements (not shown) are switched. A motor electronic control unit (hereinafter referred to as a motor ECU) 40 that controls the motors MG1 and MG2 by performing the chinching control, an air conditioner 90 that performs air conditioning in the passenger compartment, and the motors MG1 via inverters 41 and 42. , The battery 50 configured as, for example, a lithium ion secondary battery capable of exchanging electric power with the MG 2 and supplying electric power to the air conditioner 90, and the electric power from the commercial power source connected to the external commercial power source via the relay 55 A battery charger 56 that can be supplied to the air conditioner 90 and the battery 50 to charge the battery 50 and a hybrid electronic control unit 70 that controls the entire vehicle are provided.

  The air conditioner 90 is a well-known air conditioner that performs air conditioning in the passenger compartment. The air conditioner 90 includes a compressor, a condenser, an expansion valve, and an evaporator (not shown) and refrigeration cycle in which refrigerant circulates and the engine 22 generates heat as a heat source and is cooled by the evaporator. And a heater core (not shown) that heats the air that has been dehumidified, and a PTC heater (not shown) that generates heat using the electric power from the battery 50 and heats the air that has been cooled and dehumidified by the evaporator. The air conditioner 90 is controlled by the hybrid electronic control unit 70.

  The charger 56 converts the AC power from the commercial power supplied via the power cord 57 into DC power, and converts the voltage of the DC power from the AC / DC converter 58 to relay the relay 55. A DC / DC converter 59 to be supplied to the side, and supplies power from the commercial power source to the battery 50 and the air conditioner 90 when the relay 55 is turned on and the power cord 57 is connected to the commercial power source.

  The hybrid electronic control unit 70 is configured as a microprocessor centered on a CPU (not shown). In addition to the CPU, a ROM that stores a processing program, a RAM that temporarily stores data, an input / output port, And a communication port. The hybrid electronic control unit 70 includes a battery voltage from a voltage sensor 51a installed between terminals of the battery 50, a charge / discharge current from a current sensor 51b attached to a power line connected to the output terminal of the battery 50, Battery temperature Tb from temperature sensor 51c attached to battery 50, shift position SP from shift position sensor 82 that detects the position of the shift lever, accelerator opening from accelerator pedal position sensor 84 that detects the amount of depression of the accelerator pedal Acc, the brake position BP from the brake pedal position sensor 86 for detecting the depression amount of the brake pedal, the vehicle speed V from the vehicle speed sensor 88, and the like are input via the input port. From the hybrid electronic control unit 70, a drive signal to the relay 55, a switching control signal to the AC / DC converter 58, a switching control signal to the DC / DC converter 59, an operation signal to the air conditioner 90, etc. are output from the output port. Is being output via. The hybrid electronic control unit 70 is connected to the engine ECU 24 and the motor ECU 40 via a communication port, and exchanges various control signals and data with the engine ECU 24 and the motor ECU 40. Further, the hybrid electronic control unit 70 manages the battery 50 based on the integrated value of the charge / discharge current detected by the current sensor 51b, and the remaining capacity as a ratio of the total capacity stored in the battery 50. (SOC) is calculated, and input / output limits Win and Wout, which are the maximum allowable power that may charge / discharge the battery 50, are calculated based on the calculated remaining capacity (SOC) and the battery temperature Tb. The input / output limits Win and Wout of the battery 50 are set to basic values of the input / output limits Win and Wout based on the battery temperature Tb, and the output limiting correction coefficient and the input limiting limit are set based on the remaining capacity (SOC) of the battery 50. It can be set by setting a correction coefficient and multiplying the basic value of the set input / output limits Win and Wout by the correction coefficient. The hybrid electronic control unit 70 also calculates the air conditioning required power Pac, which is the power required to set the temperature in the passenger compartment to the set temperature T * set by an operation panel (not shown) of the air conditioner 90. .

  The hybrid vehicle 20 of the embodiment thus configured calculates the required torque to be output to the ring gear shaft 32a as the drive shaft based on the accelerator opening Acc and the vehicle speed V corresponding to the depression amount of the accelerator pedal 83 by the driver. Then, the operation of the engine 22, the motor MG1, and the motor MG2 is controlled so that the required power corresponding to the required torque is output to the ring gear shaft 32a. As the operation control of the engine 22, the motor MG1, and the motor MG2, the operation of the engine 22 is controlled so that power corresponding to the required power is output from the engine 22, and all of the power output from the engine 22 is transmitted to the planetary gear 30 and the motor MG1. The motor MG2 converts the torque of the motor MG1 and the motor MG2 so that the motor MG1 and the motor MG2 are driven and controlled, and the power suitable for the sum of the required power and the power required for charging and discharging the battery 50 is obtained. The operation of the engine 22 is controlled so as to be output from the engine 22, and all or a part of the power output from the engine 22 with charging / discharging of the battery 50 is converted by the planetary gear 30, the motor MG1, and the motor MG2. Accordingly, the required power is output to the drive shaft 36. Charge-discharge drive mode for driving and controlling the motor MG1 and the motor MG2, there is a motor operation mode in which operation control to output a power commensurate to stop the operation of the engine 22 to the required power from the motor MG2 to the drive shaft 36.

  Further, in the hybrid vehicle 20 of the embodiment, when the power cord 57 is connected to the commercial power source after stopping the vehicle at home or at a preset charging point, the remaining capacity (SOC) of the battery 50 is generated by the power from the commercial power source. Is controlled to control the AC / DC converter 58 and the DC / DC converter 59 of the charger 56 so as to charge up to a predetermined charging target value (for example, 80%). When the system is started after the battery 50 is charged, traveling in the motor operation mode (electric traveling) is performed until the remaining capacity (SOC) of the battery 50 reaches a threshold value Shv set to such an extent that the engine 22 can be started. The vehicle travels in the electric travel priority mode that travels preferentially. After the remaining capacity (SOC) of the battery 50 reaches the threshold value Shv, the vehicle travels in the hybrid travel priority mode that travels with priority on the travel in the engine operation mode (hybrid travel). To do.

  Further, in the hybrid vehicle 20 of the embodiment, after the system is started, the air conditioning control after starting the system that controls the blower, the compressor, the PTC heater, and the like (not shown) of the air conditioner 90 so that the temperature in the passenger compartment becomes the set temperature T *. Execute. When the system is stopped, the time when the vehicle is scheduled to be activated next and the set temperature T * of the passenger compartment at that time are input from the operation panel (not shown) of the air conditioner 90 or the system is activated. When a pre-air conditioning switch (not shown) that instructs execution of previous air conditioning is turned on, it is assumed that an operation request for the air conditioning device 90 has been made, and the air conditioning device 90 is operated before the system is started to set the passenger compartment to the set temperature T *. Execute air conditioning control while the system is stopped.

  Next, an operation when the vehicle system is stopped, particularly an operation when the air conditioner 90 is operated when the power cord 57 is connected to a commercial power source will be described. FIG. 2 is a flowchart showing an example of an air conditioning operation request control routine executed by the hybrid electronic control unit 70. This routine is performed every predetermined time when an operation request for the air conditioner 90 is made after the power cord 57 is connected to a commercial power source, the battery 50 is charged, and the remaining capacity (SOC) of the battery 50 reaches the charging target value. It is repeatedly executed (for example, every several msec). In this routine, when the temperature in the passenger compartment reaches the set temperature T *, the process is terminated even when the routine is being executed.

  When the air conditioning operation request control routine is executed, the CPU (not shown) of the hybrid electronic control unit 70 first inputs data necessary for control such as the battery temperature Tb from the temperature sensor 51c attached to the battery 50 ( Step S100), a process of comparing the input battery temperature Tb with the determination temperature Tref is executed (step S110). Here, the determination temperature Tref is assumed to be a lower limit value (for example, −10 ° C., −15 ° C., −20 ° C., etc.) of the temperature at which the battery 50 can be operated satisfactorily. Therefore, the process of step S110 is a process of determining whether or not the battery 50 can operate satisfactorily.

  When the battery temperature Tb is equal to or higher than the determination temperature Tref (step S110), it is determined that the battery 50 is at a temperature at which the battery 50 can be satisfactorily operated, and the pre-air-conditioning time that is predetermined for the target charge / discharge power Pb * of the battery 50 Electric power Pb1 is set (step S120), and the value obtained by subtracting the set target charge / discharge power Pb * from the calculated air conditioning required power Pac is set as the target output P * of the charger 56 (step S180). The air conditioning control is performed while the system is stopped at the temperature T *, and the AC / DC converter 58 and the DC / DC converter 59 of the charger 56 are controlled so that the power of the target output P * is output from the charger 56. (Step S190), and the control routine at the time of the air conditioning operation request is completed. In the process of step S120, the pre-air-conditioning power Pb1 is assumed to be a power amount slightly larger than the predicted fluctuation amount by predicting the fluctuation amount of the power consumption in the air conditioner 90. In the case of 850 kW, it was set to about 150 kW. With such control, as shown in FIG. 3, the air conditioner 90 can be operated with the required air conditioning power Pac while discharging the battery 50 with the target charge / discharge power Pb * (pre-air-conditioning power Pb1). At this time, since the battery 50 is discharged with the target charge / discharge power Pb *, it is possible to suppress the battery 50 from being overcharged when the power consumption of the air conditioner 90 fluctuates.

  When the battery temperature Tb is less than the determination temperature Tref (step S110), it is determined that the battery 50 does not operate satisfactorily, and the elapsed time t after it is determined that the battery temperature Tb is less than the determination temperature Tref is Until the time t1, the low-temperature initial discharge power Pb2 is set as the target charge / discharge power Pb * of the battery 50 (steps S130 and S140), and when the elapsed time t reaches the time t1, the elapsed time t is further increased to the time t2. The target charging / discharging power Pb * is gradually decreased at the rate k toward the value 0 (steps S130, S150, S160) until the elapsed time t reaches the time t2, and the following equation (1) is used. The target charge / discharge power Pb * is set (steps S130, S150, S170). Then, a value obtained by subtracting the set target charge / discharge power Pb * from the calculated air conditioning required power Pac is set as the target output P * of the charger 56 (step S180), and the temperature in the passenger compartment is set as the set temperature T *. The air conditioning control while the system is stopped is executed and the charger 56 is controlled so that the power of the target output P * is output from the charger 56 (step S190), and the control routine at the time of the air conditioning operation request is ended. Here, in the formula (1), “f: is a frequency obtained by repeating experiments and analyzes in advance based on characteristics of the battery 50 as a frequency at which the battery 50 can be efficiently heated and discharged and charged repeatedly. Thus, as shown in Fig. 6, the battery 50 is discharged until the elapsed time t reaches the time t2, and then the air conditioner 90 is turned on while repeating the charging and discharging of the battery 50 alternately. Therefore, the low-temperature initial discharge power Pb2 and the time t1 are not overcharged even when the elapsed time t has passed the time t2 and charging of the battery 50 is started. The amount of stored electricity is determined in advance through experiments, analysis, etc., and is set based on the amount of stored power thus obtained. Although it may be set as the same power as the timing power Pb1 or may be set as a different power, it is desirable that the power be slightly higher than the pre-air-conditioning power Pb1 in order to promote the temperature rise of the battery 50. The time t2 is set as a time for mitigating such a sudden change in the charge / discharge state when the battery 50 is switched from the discharged state to the charged state. Since the temperature can be increased, the system can be started and the vehicle can start running with the battery 50 at a higher temperature, overcharging of the battery 50 can be suppressed, and the battery 50 can be discharged and charged. Are alternately repeated, the temperature of the battery 50 can be raised while suppressing a decrease in the remaining capacity (SOC) of the battery 50, and the system It is possible to raise the temperature of the battery 50 more appropriately while the battery 50 is stopped, and the battery 50 until the elapsed time t reaches the time t2 after the battery temperature Tb is determined to be lower than the determination temperature Tref. Since it discharges, it can suppress that the battery 50 becomes overcharge.

Pb * = Pb2 ・ sin (2πf ・ (t-t2)) (1)

  When the battery temperature Tb becomes equal to or higher than the determination temperature Tref during the operation of the air conditioner 90 while alternately repeating the discharging and charging of the battery 50 (step S110), the discharging and charging are repeated. And the air conditioner 90 is operated while discharging the battery 50 with the target charge / discharge power Pb * (steps S110, S120, S180, S190). By such control, it is possible to suppress the battery 50 from being excessively heated.

  According to the hybrid vehicle 20 of the embodiment described above, when the battery temperature Tb is lower than the determination temperature Tref, the air conditioner 90 is operated with the air conditioning request output Pac while alternately discharging and charging the battery 50. The battery 50 can be heated while suppressing a decrease in the remaining capacity (SOC) of the battery 50, and the battery 50 can be heated more appropriately while the system is stopped. In addition, since the battery 50 is discharged until the elapsed time t reaches the time t2 after it is determined that the battery temperature Tb is lower than the determination temperature Tref, the battery 50 can be prevented from being overcharged. Further, when the battery temperature Tb becomes equal to or higher than the determination temperature Tref while the air conditioner 90 is operated at the target output Pac while alternately discharging and charging the battery 50, the battery 50 is discharged and charged. Since the repetition is stopped, it is possible to suppress the battery 50 from being excessively heated.

  In the hybrid vehicle 20 of the embodiment, the target charge / discharge power Pb * is set by using the above-described formula (1) in the process of step S170, but the battery 50 is charged and discharged by the target charge / discharge power Pb *. May be set to be repeated alternately, and may be set by a method different from the above-described formula (1). For example, when charging / discharging the battery 50, the target charge / discharge power P * is changed with time. It may be set to have a rectangular wave shape or a triangular wave shape.

  In the hybrid vehicle 20 of the embodiment, the battery 50 is discharged until the elapsed time t reaches the time t2 after the battery temperature Tb is determined to be lower than the determination temperature Tref in the air conditioning operation request control routine of FIG. Thereafter, charging and discharging of the battery 50 are alternately repeated. However, depending on the state of the battery 50, the battery 50 is charged immediately after the battery temperature Tb is determined to be lower than the determination temperature Tref, and then the battery 50 is charged. It is good also as what repeats 50 discharge and charge alternately.

  In the hybrid vehicle 20 of the embodiment, when the operation request for the air conditioner 90 is made after the power cord 57 is connected to the commercial power source and the battery 50 is charged and the remaining capacity (SOC) of the battery 50 reaches the charging target value. 2 is executed, when the power cord 57 is connected to the commercial power source and the air conditioner 90 is requested to operate regardless of the remaining capacity (SOC) of the battery 50. The air conditioning operation request control routine may be executed. For example, the air conditioner 90 is requested to operate while the power cord 57 is connected to the commercial power source and the battery 50 is being charged toward the charging target value. The charging of the battery 50 may be interrupted and the air conditioning operation request time control routine of FIG. 2 may be executed.

  In the hybrid vehicle 20 of the embodiment, the target charge / discharge power Pb * is set so that the battery 50 is discharged at the target charge / discharge power Pb * (pre-air-conditioning power Pb1) when the battery temperature Tb is equal to or higher than the determination temperature Tref. However, the value may be set to 0 so that the battery 50 is not charged or discharged.

  In the hybrid vehicle 20 of the embodiment, the control when the operation request for the air conditioner 90 is made while the system is stopped is exemplified. However, as the device that operates while the system is stopped, the air conditioner is used. The device is not limited to 90 and may be any device that can operate by receiving power supply from the battery 50 and the charger 56. For example, the device can operate by receiving power supply from the battery 50 and the charger 56. The seat heater built in the seat on which the occupant is seated, or a defogger attached to the rear window that can operate by receiving power supplied from the battery 50 and the charger 56 may be used.

  In the hybrid vehicle 20 of the embodiment, the battery 50 is configured as a lithium ion secondary battery. However, the battery 50 may be a secondary battery. For example, the battery 50 may be a nickel hydride secondary battery or nickel cadmium. It may be configured as a secondary battery or a lead storage battery.

  In the embodiment, the present invention has been described as the form of the hybrid vehicle 20. However, when the form of the hybrid vehicle is used, the present invention is not limited to the configuration including the engine 22, the planetary gear 30, the motors MG 1, MG 2, and the battery 50. As long as it includes an engine, a motor for traveling, and a battery capable of supplying electric power to the motor, a hybrid vehicle having any configuration may be used. Further, the present invention is not limited to the form of a hybrid vehicle, and may be a form of a vehicle including an electric motor capable of inputting / outputting driving power without mounting an engine, or may be a form of a control method for such a vehicle. .

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problems will be described. In the embodiment, the motor MG2 corresponds to the “motor”, the air conditioner 90 corresponds to the “auxiliary device”, the battery 50 corresponds to the “secondary battery”, and the charger 56 corresponds to the “power supply means”. When the power supply cord 57 is connected to a commercial power source and the battery 50 is charged and the remaining capacity (SOC) of the battery 50 reaches the charge target value, an operation request for the air conditioner 90 is made and the battery 50 is charged and discharged. The target output P * of the charger 56 is set so as to be alternately repeated, and the air conditioner 90 is controlled to operate with the target output Pac, and the charger 56 is controlled with the target output P *. The hybrid electronic control unit 70 that executes the processing of steps S110 and S130 to S190 of the control routine corresponds to “control means”. The motor MG1 corresponds to a “generator”, and the planetary gear 30 corresponds to a “3-axis power input / output unit”.

  Here, the “motor” is not limited to the motor MG2 configured as a synchronous generator motor, and may be any type of motor as long as it can input and output power to the drive shaft, such as an induction motor. Absent. The “auxiliary machine” is not limited to the air conditioner 90, and may be any apparatus that can be operated using electric power, such as a seat heater built in a seat on which a passenger is seated or a defogger attached to a rear window. It doesn't matter what. The “secondary battery” is not limited to the battery 50 configured as a lithium ion secondary battery, and can exchange electric power with an electric motor such as a nickel hydride secondary battery, a nickel cadmium secondary battery, or a lead storage battery. As long as it is capable of outputting power to the auxiliary machine, it may be anything. The “power supply means” is not limited to the charger 56, and can supply power from the external power source to the secondary battery and the auxiliary device when connected to an external power source that is a power source outside the vehicle. Anything can be used. As the “control means”, when the operation request for the air conditioner 90 is made after the power cord 57 is connected to the commercial power source and the battery 50 is charged and the remaining capacity (SOC) of the battery 50 reaches the charge target value, The target output P * of the charger 56 is set so that charging and discharging of the battery 50 are alternately repeated, and the air conditioner 90 is controlled to operate at the target output Pac and the charger 56 is controlled based on the target output P *. The power supply means is connected to an external power source while the vehicle system is stopped, and the temperature of the secondary battery is preset as the lower limit of the temperature at which the secondary battery can operate satisfactorily Discharge operation control for controlling the auxiliary machine and the power supply means so that the auxiliary machine is operated with the discharge of the secondary battery when the auxiliary machine is requested to operate at a temperature lower than the predetermined temperature. battery As long as the accessory with a charging is performed to alternately charge operation control for controlling the auxiliary and power supply unit to operate it may be used as any kind. The “generator” is not limited to the motor MG1 configured as a synchronous generator motor, and may be any type of generator such as an induction motor that can input and output power. The “three-axis power input / output means” is not limited to the planetary gear 30 described above, such as a device using a double pinion planetary gear mechanism, a combination of a plurality of planetary gear mechanisms, or a differential gear. Connected to three shafts of the drive shaft connected to the axle, the output shaft of the internal combustion engine, and the rotating shaft of the generator, such as one having a differential action different from that of the planetary gear. Based on the output power, it is connected to the drive shaft that inputs / outputs power to / from the remaining shaft, the output shaft, and the rotation shaft of the generator, and the power that is input / output to / from any of the three shafts. As long as the power is input / output to / from the remaining shafts, any method may be used.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the same as that of the embodiment described in the column of means for solving the problem. Therefore, the elements of the invention described in the column of means for solving the problems are not limited. That is, the interpretation of the invention described in the column of means for solving the problems should be made based on the description of the column, and the examples are those of the invention described in the column of means for solving the problems. It is only a specific example.

  As mentioned above, although the form for implementing this invention was demonstrated using the Example, this invention is not limited at all to such an Example, In the range which does not deviate from the summary of this invention, it is with various forms. Of course, it can be implemented.

  The present invention can be used in the vehicle manufacturing industry.

20 hybrid vehicle, 22 engine, 24 engine electronic control unit (engine ECU), 26 crankshaft, 30 planetary gear, 36 drive shaft, 37
Differential gear, 38a, 38b Drive wheel, 40 Motor electronic control unit (motor ECU), 41, 42 Inverter, 50 Battery, 51a Voltage sensor, 51b Current sensor, 51c Temperature sensor, 55 Relay, 56 Charger, 57 Power cord 58 AC / DC converter, 59 DC / DC converter, 70 hybrid electronic control unit, 82 shift position sensor, 84 accelerator pedal position sensor, 86 brake pedal position sensor, 88 vehicle speed sensor, 90 air conditioner, MG1, MG2 motor.

Claims (8)

A vehicle including an electric motor capable of inputting and outputting driving power,
An auxiliary machine that can be operated using electric power,
A secondary battery capable of exchanging electric power with the electric motor and outputting electric power to the auxiliary machine;
Power supply means capable of supplying power from the external power source to the secondary battery and the auxiliary device when connected to an external power source that is an external power source;
While the vehicle system is stopped, the power supply means is connected to the external power source, and the temperature of the secondary battery is preset as a lower limit of the temperature at which the secondary battery can be operated satisfactorily A discharge operation control for controlling the auxiliary device and the power supply means so that the auxiliary device is operated with discharge of the secondary battery when an operation request of the auxiliary device is made in a state where the temperature is lower than the temperature; Control means for alternately executing charging operation control for controlling the auxiliary machine and the power supply means so that the auxiliary machine is operated with charging of the secondary battery;
A vehicle comprising: The vehicle according to claim 1,
The control means is means for first executing the discharge operation control. The vehicle according to claim 1 or 2,
The control means is means for stopping the discharge operation control and the charge operation control when the temperature of the secondary battery reaches or exceeds the predetermined temperature. A vehicle according to any one of claims 1 to 3,
The control means stores the secondary battery in a state where the power supply means is connected to the external power source and the temperature of the secondary battery is lower than the predetermined temperature while the vehicle system is stopped. The discharge operation is performed when an operation request for the auxiliary machine is made after the amount reaches a predetermined target storage amount as a target value of the storage amount of the secondary battery when the system of the vehicle is stopped. A vehicle which is means for alternately executing control and charge operation control. A vehicle according to any one of claims 1 to 4,
The secondary battery is a lithium ion secondary battery. A vehicle according to any one of claims 1 to 5,
The auxiliary machine is an air conditioner that performs air conditioning of a passenger compartment using electric power. A vehicle according to any one of claims 1 to 6,
An internal combustion engine capable of outputting driving power;
A generator capable of inputting and outputting power;
The remaining shaft is connected to three shafts, that is, a drive shaft coupled to an axle, an output shaft of the internal combustion engine, and a rotating shaft of the generator, and based on power input / output to / from any two of the three shafts 3-axis power input / output means for inputting / outputting power to / from,
With
The electric motor is connected to the drive shaft. An electric motor capable of inputting and outputting driving power; an auxiliary machine operable with electric power; a secondary battery capable of exchanging electric power with the electric motor and outputting electric power to the auxiliary machine; A vehicle control method comprising: a power supply unit capable of supplying power from the external power source to the secondary battery and the auxiliary machine when connected to an external power source that is a power source;
While the vehicle system is stopped, the power supply means is connected to the external power source, and the temperature of the secondary battery is preset as a lower limit of the temperature at which the secondary battery can be operated satisfactorily A discharge operation control for controlling the auxiliary device and the power supply means so that the auxiliary device is operated with discharge of the secondary battery when an operation request of the auxiliary device is made in a state where the temperature is lower than the temperature; Charging operation control for controlling the auxiliary device and the power supply means is alternately executed so that the auxiliary device is operated with charging of the secondary battery.

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