JP6304056B2 - Hybrid car - Google Patents

Description

  The present invention relates to a hybrid vehicle, and more particularly, to a hybrid vehicle including an engine, a generator, a battery, and an external power feeding device.

  Conventionally, as this type of hybrid vehicle, a vehicle including an engine, an MG (Motor Generator), a battery, and a power converter has been proposed (see, for example, Patent Document 1). The MG generates power using power from the engine and exchanges power with the battery. The power converter converts DC power of a power line connecting the MG and the battery into AC power, and supplies the AC power to an external device connected to the outlet. In this hybrid vehicle, when the remaining capacity of the battery is equal to or less than a threshold value when the vehicle is stopped, forced charging is performed to generate power by the MG using the power from the engine to charge the battery. When the power supply mode in which power is supplied to the external device by the power converter is selected and the battery input limit upper limit value is less than the threshold value, power supply to the external device by the power converter is limited (reduction of power supply power or Stop power supply). Thereby, it can suppress that the state with the low remaining capacity of a battery continues over a long time.

JP2013-183525A

  In general, deterioration of a battery is likely to be accelerated when charging power (charging current) is large. In particular, when the power supply mode is selected while the vehicle is stopped, compared to when the power supply mode is not selected, the remaining capacity of the battery is likely to decrease while the engine is stopped. . For this reason, when performing forced charging while the vehicle is stopped, if the battery is charged with relatively high power regardless of whether or not the power supply mode is selected, the battery is repeatedly charged with relatively high power when the power supply mode is selected. Since this is done, the deterioration of the battery is likely to be promoted.

  The main purpose of the hybrid vehicle of the present invention is to suppress the deterioration of the battery.

  The hybrid vehicle of the present invention employs the following means in order to achieve the main object described above.

The hybrid vehicle of the present invention
Engine,
A generator that generates power using power from the engine;
A battery connected to a power line with the generator;
An external power supply device for performing external power supply for supplying power from the power line to an external device;
While the vehicle is stopped, the power generation using the power from the engine until the storage ratio of the battery reaches a first threshold value or less until the storage ratio of the battery reaches a second threshold value or more that is larger than the first threshold value. Control means for performing predetermined charging control for controlling the engine and the generator so that the battery is charged by power generation of the machine;
A hybrid vehicle comprising:
When the predetermined charging control is performed while the vehicle is stopped, the control means has a smaller electric power when the external power feeding device performs the external power feeding than when the external power feeding device does not perform the external power feeding. And a means for controlling the battery to be charged.
It is characterized by that.

  In the hybrid vehicle of the present invention, when the storage ratio of the battery reaches the first threshold value or less while the vehicle is stopped, the power from the engine is increased until the storage ratio of the battery reaches the second threshold value or more which is larger than the first threshold value. Predetermined charging control is performed to control the engine and the generator so that the battery is charged by power generation of the used generator. When performing predetermined charging control while the vehicle is stopped, control is performed so that the battery is charged with lower power when external power feeding is performed by the external power feeding device than when external power feeding is not performed by the external power feeding device. To do. When external power feeding is being performed, the battery charge ratio is likely to be reduced during engine stoppage, compared to when external power feeding is not being performed, and therefore execution and stop of the predetermined charge control are likely to be repeated. In the hybrid vehicle of the present invention, when charging the battery while the vehicle is stopped, control is performed so that the battery is charged with less power when external power feeding is performed than when the external power feeding is not performed. The battery can be prevented from being repeatedly charged with a relatively large electric power, and the deterioration of the battery can be prevented from being promoted.

  In such a hybrid vehicle of the present invention, the control means, when the external power feeding is performed by the external power feeding device during the stop, compared to when the external power feeding is not performed by the external power feeding device, The first threshold value and the second threshold value may be increased. In general, when a power storage ratio is low, the battery is likely to be deteriorated. Further, as described above, when external power feeding is performed, execution and stop of the predetermined charging control are more likely to be repeated than when external power feeding is not performed. In the hybrid vehicle of the present invention of this aspect, by performing such control, it is possible to suppress frequent charging and discharging of the battery in a region where the storage ratio of the battery is relatively low. As a result, it is possible to suppress the deterioration of the battery.

  Further, in the hybrid vehicle of the present invention, when the predetermined charging control is performed while the vehicle is stopped, when the external power feeding is performed by the external power feeding device and the battery deterioration is not promoted, The battery is charged with a higher power than when the external power feeding device is not performing the external power feeding and when the external power feeding device is performing the external power feeding than when the battery is promoted to deteriorate. It is good also as a means to control. In this way, opportunities for reducing the charging power (charging current) of the battery can be further limited. Here, when the deterioration of the battery is not promoted, when the battery temperature is within a predetermined temperature range, when the number of charge / discharge cycles from the time of shipment from the factory is a predetermined number or less, the storage ratio is equal to or higher than the predetermined ratio. Normal conditions can be used, such as when.

  Furthermore, in the hybrid vehicle of the present invention, when the temperature of the battery exceeds a predetermined temperature, the control means reduces the allowable input power of the battery as compared with when the temperature of the battery is equal to or lower than the predetermined temperature. And the control means is a means for limiting the external power supply when the external power supply is performed by the external power supply device and the allowable input power of the battery becomes smaller than a predetermined power. There may be. Thereby, it can suppress that the state with the low electrical storage ratio of a battery continues over a long time. Moreover, in the hybrid vehicle of the present invention, as described above, when charging the battery while the vehicle is stopped, the battery is charged with a smaller electric power when external power feeding is performed than when no external power feeding is performed. To control. Thereby, the temperature rise of a battery can be suppressed and it can suppress that external electric power feeding is restrict | limited. Here, “restrict external power supply” means to stop external power supply or to continue external power supply by reducing the power of external power supply.

  In addition, in the hybrid vehicle of the present invention, the battery may be configured as a lithium ion secondary battery.

  In the hybrid vehicle of the present invention, a planetary gear in which three rotating elements are connected to a rotating shaft of the generator, an output shaft of the engine, and a driving shaft connected to a driving wheel, and the power line and the planetary gear. A motor that can input and output power to the drive shaft may be provided.

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 explanatory drawing which shows an example of the relationship between battery temperature Tb of the battery 50, and basic input / output restrictions Wintmp, Wouttmp. It is explanatory drawing which shows an example of the relationship between the electrical storage ratio SOC of the battery 50, and the correction coefficients kin and kout. It is explanatory drawing which shows an example of the collinear diagram which is a dynamic relationship of the rotation speed and torque in the rotation element of the planetary gear 30 when performing predetermined charge control. It is a flowchart which shows an example of the 1st process routine performed by HVECU70 of an Example. 7 is a flowchart showing an example of a second processing routine executed by the HVECU 70. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 120 according to a modification. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 220 of a modified example.

  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, a planetary gear 30, motors MG1 and MG2, inverters 41 and 42, a battery 50, an external power supply device 60, a hybrid electronic control unit (hereinafter referred to as a hybrid electronic control unit). , “HVECU”) 70.

  The engine 22 is configured as an internal combustion engine that outputs power using gasoline or light oil as a fuel. The operation of the engine 22 is controlled by an engine electronic control unit (hereinafter referred to as “engine ECU”) 24.

  Although not shown, the engine ECU 24 is configured as a microprocessor centered on a CPU, and includes a ROM for storing a processing program, a RAM for temporarily storing data, an input / output port, and a communication port in addition to the CPU. . Signals from various sensors necessary for controlling the operation of the engine 22 are input to the engine ECU 24 from an input port. Examples of signals from various sensors include the following. A crank angle θcr from a crank position sensor 23 that detects the rotational position of the crankshaft 26 of the engine 22. The throttle opening TH from the throttle valve position sensor that detects the throttle valve position. Various control signals for controlling the operation of the engine 22 are output from the engine ECU 24 through an output port. Examples of various control signals include the following. Control signal to the fuel injection valve. Control signal to the throttle motor that adjusts the throttle valve position. Control signal to the ignition coil integrated with the igniter. The engine ECU 24 is connected to the HVECU 70 via a communication port. The engine ECU 24 controls the operation of the engine 22 by a control signal from the HVECU 70. Further, the engine ECU 24 outputs data relating to the operating state of the engine 22 to the HVECU 70 as necessary. The engine ECU 24 calculates the rotation speed of the crankshaft 26, that is, the rotation speed Ne of the engine 22 based on the crank angle θcr from the crank position sensor 23.

  The planetary gear 30 is configured as a single pinion type planetary gear mechanism. The sun gear of planetary gear 30 is connected to the rotor of motor MG1. The ring gear of the planetary gear 30 is connected to a drive shaft 36 connected to drive wheels 38a and 38b via a differential gear 37 and a rotor of the motor MG2. A crankshaft 26 of the engine 22 is connected to the carrier of the planetary gear 30.

  The motor MG1 is configured as a synchronous generator motor, for example. As described above, the motor MG1 has a rotor connected to the sun gear of the planetary gear 30. The motor MG2 is configured as, for example, a synchronous generator motor. In the motor MG2, the rotor is connected to the drive shaft 36 as described above. The inverters 41 and 42 are connected to the power line 54 together with the battery 50. The motors MG1 and MG2 are driven to rotate by switching control of a plurality of switching elements (not shown) of the inverters 41 and 42 by a motor electronic control unit (hereinafter referred to as “motor ECU”) 40.

  Although not shown, the motor ECU 40 is configured as a microprocessor centered on a CPU, and includes a ROM for storing a processing program, a RAM for temporarily storing data, an input / output port, and a communication port in addition to the CPU. . Signals from various sensors necessary for driving and controlling the motors MG1, MG2 are input to the motor ECU 40 via the input port. Examples of signals from various sensors include the following. Rotation positions θm1 and θm2 from rotation position detection sensors 43 and 44 that detect the rotation positions of the rotors of the motors MG1 and MG2. Phase current from a current sensor that detects current flowing in each phase of motors MG1 and MG2. The motor ECU 40 outputs a switching control signal to a switching element (not shown) of the inverters 41 and 42 through an output port. The motor ECU 40 is connected to the HVECU 70 via a communication port. The motor ECU 40 controls driving of the motors MG1 and MG2 by a control signal from the HVECU 70. In addition, motor ECU 40 outputs data relating to the driving state of motors MG1 and MG2 to HVECU 70 as necessary. The motor ECU 40 calculates the rotational speeds Nm1, Nm2 of the motors MG1, MG2 based on the rotational positions θm1, θm2 of the rotors of the motors MG1, MG2 from the rotational position detection sensors 43, 44.

  The battery 50 is configured as a lithium ion secondary battery. The lithium ion secondary battery has a characteristic that deterioration is more easily promoted as the storage ratio SOC during charging is lower and the charging power (charging current) is larger. As described above, the battery 50 is connected to the power line 54 together with the inverters 41 and 42. The battery 50 is managed by a battery electronic control unit (hereinafter referred to as “battery ECU”) 52.

  Although not shown, the battery ECU 52 is configured as a microprocessor centered on a CPU, and includes a ROM for storing a processing program, a RAM for temporarily storing data, an input / output port, and a communication port in addition to the CPU. . Signals from various sensors necessary for managing the battery 50 are input to the battery ECU 52 via the input port. Examples of signals from various sensors include the following. The battery voltage Vb from the voltage sensor 51a installed between the terminals of the battery 50. Battery current Ib from the current sensor 51b attached to the output terminal of the battery 50 (a positive value when discharging from the battery 50). The battery temperature Tb from the temperature sensor 51c attached to the battery 50. The battery ECU 52 is connected to the HVECU 70 via a communication port. The battery ECU 52 outputs data relating to the state of the battery 50 to the HVECU 70 as necessary. The battery ECU 52 calculates the storage ratio SOC based on the integrated value of the battery current Ib from the current sensor 51b. The storage ratio SOC is a ratio of the capacity of power that can be discharged from the battery 50 to the total capacity of the battery 50. Further, the battery ECU 52 calculates the input / output limits Win, Wout based on the calculated storage ratio SOC and the battery temperature Tb from the temperature sensor 51c. The input / output limits Win and Wout are the maximum allowable power that may charge / discharge the battery 50.

  The input / output limits Win and Wout of the battery 50 can be set as follows. First, based on the battery temperature Tb of the battery 50, basic input / output limits Wintmp, Wouttmp are set as basic values of the input / output limits Win, Wout. An example of the relationship between the battery temperature Tb of the battery 50 and the basic input / output limits Wintmp, Wouttmp is shown in FIG. Subsequently, correction coefficients kin and kout are set based on the storage ratio SOC of the battery 50. An example of the relationship between the storage ratio SOC of the battery 50 and the correction coefficients kin and kout is shown in FIG. Then, the basic input / output limits Wintmp, Wouttmp are multiplied by the correction coefficients kin, kout to calculate the input / output limits Win, Wout.

  As shown in FIG. 2, the basic input / output limits Wintmp, Wouttmp are set as follows. In a region where the battery temperature Tb is equal to or lower than a predetermined temperature Tb1 (for example, 45 ° C., 50 ° C., 55 ° C., etc.), predetermined power (−W1) and W1 are set in the basic input / output limits Wintmp and Wouttmp. In the region where the battery temperature Tb is higher than the predetermined temperature Tb1, the absolute value of the basic input / output limits Wintmp and Wouttmp decreases as the battery temperature Tb increases from the predetermined power W1 toward the value 0 and is constant at the value 0. Is set.

  As shown in FIG. 3, the correction coefficients kin and kout are set as follows. In a region where the power storage rate SOC is equal to or less than a predetermined rate Shi (for example, 78%, 80%, 82%, etc.), the value 1 is set for the correction coefficient kin. Further, in the region where the storage ratio SOC is larger than the predetermined ratio Shi, the correction coefficient kin is set to a value that decreases from the value 1 toward the value 0 and becomes constant at the value 0 as the storage ratio SOC increases. In a region where the power storage rate SOC is equal to or greater than a predetermined rate Slo (for example, 28%, 30%, 32%, etc.), the value 1 is set for the correction coefficient kout. Further, in a region where the storage ratio SOC is less than the predetermined ratio Slo, the correction coefficient kout is set to a value that decreases from the value 1 toward the value 0 and becomes constant at the value 0 as the storage ratio SOC decreases.

  Therefore, the input limit Win is a value (−W1) in a region where the battery temperature Tb is equal to or lower than the predetermined temperature Tb1 and the power storage rate SOC is equal to or lower than the predetermined rate Shi. Further, the input limit Win decreases as the battery temperature Tb increases in a region where the battery temperature Tb is higher than the predetermined temperature Tb1 or as the storage rate SOC increases in a region where it is higher than the predetermined rate Shi. The output limit Wout is a value W1 in a region where the battery temperature Tb is equal to or lower than the predetermined temperature Tb1 and the storage rate SOC is equal to or higher than the predetermined rate Slo. Further, the output limit Wout decreases as the battery temperature Tb increases in a region where the battery temperature Tb is higher than the predetermined temperature Tb1 or as the storage rate SOC decreases in a region where the power storage rate SOC is smaller than the predetermined rate Slo.

  The external power supply device 60 is connected to the power line 54 and an outlet 64 for connecting an external device that is not a component of the vehicle. Although not shown, the external power supply device 60 includes an inverter. The inverter converts the DC power of the power line 54 into AC power having a desired voltage (for example, AC 100V power), and supplies the AC power to an external device connected to the outlet 64. Hereinafter, supplying power from the power line 54 to an external device is referred to as “external power supply”. In this inverter, a plurality of switching elements (not shown) are subjected to switching control by the HVECU 70.

  Although not shown, the HVECU 70 is configured as a microprocessor centered on a CPU, and includes a ROM for storing a processing program, a RAM for temporarily storing data, an input / output port, and a communication port in addition to the CPU. Signals from various sensors are input to the HVECU 70 via input ports. Examples of signals from various sensors include the following. Feed power Ph from the power sensor 62 that detects the feed power of the external feed by the external feed device 60. An ignition signal from the ignition switch 80. A shift position SP from the shift position sensor 82 that detects the operation position of the shift lever 81. Accelerator opening degree Acc from the accelerator pedal position sensor 84 that detects the depression amount of the accelerator pedal 83. The brake pedal position BP from the brake pedal position sensor 86 that detects the amount of depression of the brake pedal 85. Vehicle speed V from the vehicle speed sensor 88. A switching control signal to the switching element of the inverter of the external power supply device 60 is output from the HVECU 70 via the output port. As described above, the HVECU 70 is connected to the engine ECU 24, the motor ECU 40, and the battery ECU 52 via the communication port. The HVECU 70 exchanges various control signals and data with the engine ECU 24, the motor ECU 40, and the battery ECU 52.

  In the hybrid vehicle 20 of the embodiment, the shift position SP detected by the shift position sensor 82 includes a parking position (P position) used during parking, a reverse position (R position) for reverse travel, and a neutral position ( N position) and forward drive position (D position). When the shift position SP is the P position, the driving wheels 38a and 38b are locked by a parking lock mechanism (not shown).

In the hybrid vehicle 20 of the embodiment thus configured, the required driving force of the drive shaft 36 is set based on the accelerator opening Acc and the vehicle speed V, and the required power corresponding to the required driving force is output to the drive shaft 36. In addition, the engine 22 and the motors MG1, MG2 are controlled to operate. The operation modes of the engine 22 and the motors MG1, MG2 include the following modes (1) to (3).
(1) Torque conversion operation mode: The engine 22 is operated and 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 motors MG1 and MG2. Is a mode in which the motors MG1 and MG2 are driven and controlled so that the torque is converted by the motor and the required power is output to the drive shaft.
(2) Charging / discharging operation mode: The engine 22 is operated and controlled so that the power corresponding to the sum of the required power and the power required for charging / discharging the battery 50 is output from the engine 22, and the power output from the engine 22 is also controlled. Is a mode in which the motor MG1 and MG2 are driven and controlled so that the required power is output to the drive shaft 36 after torque conversion is performed by the planetary gear 30 and the motors MG1 and MG2 with charging / discharging of the battery 50. .
(3) Motor operation mode: Mode in which the operation of the engine 22 is stopped and the motor MG2 is driven and controlled so that the required power is output to the drive shaft 36.

  Further, in the hybrid vehicle 20 of the embodiment, when the shift position SP is the P position, the engine 22 is basically stopped. When the storage ratio SOC of the battery 50 reaches a threshold value Sst or less due to power consumption by an auxiliary device (such as an air conditioner) (not shown) or external power feeding by the external power feeding device 60, the engine 22 is cranked and started by the motor MG1. To do. Then, the engine 22 and the motor MG1 are controlled so that the battery 50 is charged by the power generation of the motor MG1 using the power from the engine 22. Hereinafter, this control is referred to as “predetermined charge control”. When the storage ratio SOC of the battery 50 reaches the threshold value Ssp or more, the predetermined charging control is terminated and the engine 22 is stopped. The threshold value Sst and the threshold value Ssp are set by a first processing routine described later.

  In the predetermined charging control, the HVECU 70 first sets a negative value to the charge / discharge request power Pb * of the battery 50 (a positive value when discharging from the battery 50). The charge / discharge required power Pb * is set by a second processing routine described later. Subsequently, it is determined whether or not external power feeding is performed by the external power feeding device 60. When external power feeding is not performed, a value (−Pb *) obtained by inverting the sign of the charge / discharge required power Pb * of the battery 50 is set as the required power Pe * of the engine 22. On the other hand, when external power feeding is performed, the sum of the value (−Pb *) and the power feeding power Ph of the external power feeding from the power sensor 62 is set as the required power Pe * of the engine 22.

  When the required power Pe * is thus set, the target rotational speed Ne * and the target torque of the engine 22 using the required power Pe * and an operation line for efficiently operating the engine 22 (for example, an optimum fuel efficiency operation line). Set Te *. Then, using the target torque Te * of the engine 22 and the gear ratio ρ (number of teeth of the sun gear / number of teeth of the ring gear) of the planetary gear 30, a torque command Tm1 * of the motor MG1 is set by the following equation (1). FIG. 4 is an explanatory diagram showing an example of a collinear diagram that is a dynamic relationship between the rotational speed and torque of the rotating element of the planetary gear 30 when the predetermined charging control is performed. In the figure, the left S-axis indicates the rotation speed of the sun gear, which is the rotation speed Nm1 of the motor MG1, the C-axis indicates the rotation speed of the carrier, which is the rotation speed Ne of the engine 22, and the R-axis indicates the rotation speed Nm2 of the motor MG2. The rotation speed Nr of the ring gear (drive shaft 36) is shown. Expression (1) can be easily derived by using this alignment chart.

  Tm1 * = − ρ ・ Te * / (1 + ρ) (1)

  When the target rotational speed Ne * and target torque Te * of the engine 22 and the torque command Tm1 * of the motor MG1 are thus set, the target rotational speed Ne * and the target torque Te * of the engine 22 are transmitted to the engine ECU 24 and the torque of the motor MG1. Command Tm1 * is transmitted to motor ECU 40. When the engine ECU 24 receives the target rotational speed Ne * and the target torque Te * of the engine 22, the intake air of the engine 22 is operated so that the engine 22 is operated based on the received target rotational speed Ne * and the target torque Te *. Perform quantity control, fuel injection control, ignition control, etc. When motor ECU 40 receives torque command Tm1 * of motor MG1, motor ECU 40 performs switching control of the switching element of inverter 41 so that motor MG1 is driven by torque command Tm1 *.

  With this control, when external power feeding is not performed by the external power feeding device 60, the required power Pe * (= −Pb *) is output from the engine 22, and the motor MG1 generates power corresponding to the required power Pe *. Is done. Then, the electric power generated by the motor MG1 is supplied to the battery 50. On the other hand, when external power feeding is performed by the external power feeding device 60, the required power Pe * (= −Pb * + Ph) is output from the engine 22, and the electric power corresponding to the required power Pe * is generated by the motor MG1. The Then, the electric power generated by the motor MG1 is supplied to the battery 50 and the external device.

  Furthermore, in the hybrid vehicle 20 of the embodiment, the HVECU 70 controls the external power supply device 60 to perform external power supply when the external power supply condition is satisfied. The external power supply condition is satisfied when an external device is connected to the outlet 64 and when the shift position SP is at the P position and an external power supply instruction is issued. The external power supply instruction is performed, for example, when a switch for external power supply is turned on by a user. Further, external power supply is stopped when the battery temperature Tb of the battery 50 rises and the absolute values of the input / output limits Win and Wout of the battery 50 become less than the predetermined power W2 that is equal to or less than the predetermined power W1. Thereby, it can suppress that the state where the electrical storage ratio SOC of the battery 50 is low continues for a long time.

  Next, the operation of the hybrid vehicle 20 of the embodiment configured as described above, in particular, the first process for setting the threshold value Sst and the threshold value Ssp when the shift position SP is the P position, and the charge / discharge when performing the predetermined charge control. The second process for setting the required power Pb * will be described. FIG. 5 is a flowchart illustrating an example of a first processing routine executed by the HVECU 70 of the embodiment. FIG. 6 is a flowchart illustrating an example of a second processing routine executed by the HVECU 70. The routine of FIG. 5 is repeatedly executed when the shift position SP is the P position. The routine of FIG. 6 is repeatedly executed when the predetermined charging control is performed.

  When the first processing routine of FIG. 5 is executed, the HVECU 70 first inputs the value of the external power supply flag F (step S100). Here, the external power supply flag F is read when the value 0 is set when the external power supply device 60 does not perform external power supply and the value 1 is set when the external power supply device 60 performs external power supply. It was supposed to be entered in

  When data is input in this way, the value of the input external power supply flag F is checked (step S110). When the external power supply flag F is 0, it is determined that external power supply is not being performed, a predetermined ratio Sst1 (for example, 38%, 40%, 42%, etc.) is set as the threshold value Sst, and a predetermined ratio Ssp1 ( For example, 48%, 50%, 52%, etc.) are set (step S120), and this routine is terminated.

  On the other hand, when the external power supply flag F is 1, it is determined that external power supply is being performed, and a predetermined ratio Sst2 (for example, 58%, 60%, 62%, etc.) larger than the predetermined ratio Sst1 is set as the threshold value Sst. At the same time, a predetermined ratio Ssp2 (for example, 68%, 70%, 72%, etc.) larger than the predetermined ratio Ssp1 is set as the threshold Ssp (step S130), and this routine is terminated. When external power feeding is performed by the external power feeding device 60, the storage ratio SOC of the battery 50 is likely to decrease during the stop of the operation of the engine 22 compared to when external power feeding is not performed. Stop is easy to repeat. In the embodiment, when the external power supply is performed, the threshold value Sst and the threshold value Ssp are increased as compared with the case where the external power supply is not performed, so that the storage ratio SOC of the battery 50 is relatively low. It can suppress that charging / discharging is repeated frequently. As a result, it is possible to suppress the deterioration of the battery 50.

  In the embodiment, the predetermined ratios Sst1, Sst2, Ssp1, and Ssp2 are values in the range from the predetermined ratio Slo to the predetermined ratio Shi.

  When the second processing routine of FIG. 6 is executed, the HVECU 70 first inputs the value of the external power supply flag F (step S200). The external power supply flag F has been described above. When data is input in this way, the value of the input external power supply flag F is checked (step S210).

  When the external power supply flag F is 0 in step S210, it is determined that external power supply is not being performed, the predetermined power Pb1 is set to the charge / discharge request power Pb * of the battery 50 (step S220), and this routine is terminated. . Here, for example, −4 kW, −4.5 kW, −5 kW, or the like can be used as the predetermined power Pb1. Thereby, since the battery 50 can be charged with relatively large electric power, the execution time of the predetermined charging control can be relatively shortened.

  When the external power supply flag F is 1 in step S210, it is determined that external power supply is being performed, and the predetermined power Pb2 larger than the predetermined power Pb1 (small in absolute value) is used as the charge / discharge required power Pb * of the battery 50. After setting (step S230), this routine is finished. Here, for example, −1 kW, −1.5 kW, −2 kW, or the like can be used as the predetermined power Pb2. When the external power supply is performed, the storage ratio SOC of the battery 50 is likely to decrease during the operation stop of the engine 22 as compared with the case where the external power supply is not performed. Cheap. For this reason, when external power feeding is being performed, the charging power (charging current) of the battery 50 is calculated using a relatively small (absolute value is large) value (for example, the predetermined power Pb1) as the charging / discharging required power Pb *. If it is relatively large, the deterioration of the battery 50 tends to be promoted. At this time, the temperature rise of the battery 50 is easily promoted. On the other hand, in the embodiment, when external power feeding is performed, the charge / discharge required power Pb * is made larger (small as an absolute value) than when no external power feeding is performed, and the battery 50 is charged. Reduce power (charging current). Accordingly, it is possible to suppress the deterioration of the battery 50 and to suppress the temperature increase of the battery 50. And as a result of the latter, it can suppress that the absolute value of the input / output restrictions Win and Wout of the battery 50 becomes small, and can suppress that external electric power feeding is stopped. Note that, by reducing the charging power of the battery 50, the execution time of the predetermined charging control (duration of operation of the engine 22) becomes longer, but it is considered that the user is not so uncomfortable. This is because the user is considered to allow the operation of the engine 22 to continue for a certain period of time when external power feeding is performed.

  In the hybrid vehicle 20 of the embodiment described above, when the battery 50 is charged with the shift position SP at the P position, the external power feeding device 60 is small when compared with when the external power feeding is not performed. The engine 22 and the motor MG1 are controlled so that the battery 50 is charged with electric power. Accordingly, it is possible to suppress the deterioration of the battery 50 and to suppress the temperature increase of the battery 50. And as a result of the latter, it can suppress that the absolute value of the input / output restrictions Win and Wout of the battery 50 becomes small, and can suppress that external electric power feeding is stopped.

  In the hybrid vehicle 20 of the embodiment, when the battery 50 is charged at the shift position SP at the P position, the battery 50 is charged with smaller power when external power feeding is performed than when the external power feeding is not performed. Thus, the engine 22 and the motor MG1 are controlled. However, when the battery 50 is charged at the shift position SP at the P position, even when external power feeding is performed, if the deterioration of the battery 50 is not promoted, the battery 50 is charged with the same power as when external power feeding is not performed. As described above, the engine 22 and the motor MG1 may be controlled. By so doing, opportunities to reduce the charging power (charging current) of the battery 50 can be further limited. Here, when the deterioration of the battery 50 is not promoted, when the battery temperature Tb is within a predetermined temperature range, when the number of charge / discharge cycles from the time of factory shipment is equal to or less than a predetermined number of times, the storage ratio SOC is a predetermined ratio. Normal conditions can be used, such as above.

  In the hybrid vehicle 20 of the embodiment, when external power feeding is not performed when the shift position SP is at the P position, the predetermined ratio Sst1 is set to the threshold value Sst and the predetermined ratio Ssp1 is set to the threshold value Ssp to perform external power feeding. In this case, the predetermined ratio Sst2 (> Sst1) is set as the threshold value Sst, and the predetermined ratio Ssp2 (> Ssp1) is set as the threshold value Ssp. However, when the shift position SP is the P position, the predetermined ratio Sst1 may be set as the threshold value Sst and the predetermined ratio Ssp1 may be set as the threshold value Ssp regardless of whether or not external power feeding is being performed.

  In the hybrid vehicle 20 of the embodiment, the absolute values of the input and output limits Win and Wout of the battery 50 are less than the predetermined power W2 that is equal to or less than the predetermined power W1 when external power feeding is performed when the shift position SP is the P position. When this happens, the external power supply is stopped. However, instead of stopping the external power supply, the power of the external power supply may be reduced to continue the external power supply. Further, the external power supply may not be stopped or the power of the external power supply may not be reduced, that is, the external power supply may not be limited.

  In the hybrid vehicle 20 of the embodiment, when the battery 50 is charged at the shift position SP at the P position and the external power is being supplied, a value obtained by inverting the sign of the charge / discharge required power Pb * of the battery 50 (−Pb *) And the externally supplied power Ph from the power sensor 62 are set to the required power Pe * of the engine 22. However, the required power Pe of the engine 22 is calculated by the following equation (2) using the charge / discharge required power Pb * of the battery 50 and the actual charge / discharge power Pb without using the externally supplied power Ph from the power sensor 62. * May be set. Here, as the actual charge / discharge power Pb of the battery 50, the product of the battery voltage Vb from the voltage sensor 51a and the battery current Ib from the current sensor 51b can be used. Expression (2) is a relational expression in feedback control for canceling the difference between the charge / discharge required power Pb * and the actual charge / discharge power Pb. In equation (2), “kp” is the gain of the proportional term.

  Pe * = − Pb * + kp ・ (Pb * −Pb) (2)

  In the hybrid vehicle 20 of the embodiment, external power feeding is allowed when the shift position SP is in the P position, and whether or not external power feeding is performed when the battery 50 is charged in the shift position SP in the P position. Accordingly, the charging power of the battery 50 is changed. However, when the vehicle is stopped, external power feeding is allowed regardless of the shift position SP. When the battery 50 is charged while the vehicle is stopped regardless of the shift position SP, the battery depends on whether or not the external power feeding is performed. The charging power of 50 may be changed. It can be considered that the vehicle is stopped when the shift position SP is a position other than the P position when the vehicle speed V is 0 and the brake pedal 85 is depressed.

  In the hybrid vehicle 20 of the embodiment, the external power supply condition (the condition that is satisfied when an external device is connected to the outlet 64 and the shift position SP is in the P position and the external power supply is instructed) is satisfied. The external power feeding device 60 is controlled when the power is on. However, external power supply may be automatically performed when the shift position SP is the P position and an external device is connected to the outlet 64. In other words, as a condition for external power supply, it may not be necessary to instruct external power supply.

  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 configured as a nickel hydride secondary battery.

  In the hybrid vehicle 20 of the embodiment, the power from the motor MG2 is output to the drive shaft 36 connected to the drive wheels 38a and 38b. However, as illustrated in the hybrid vehicle 120 of the modification of FIG. 7, the power from the motor MG2 is different from the axle connected to the drive wheels 38a and 38b (connected to the wheels 39a and 39b in FIG. 7). It may be output to the axle.

  In the hybrid vehicle 20 of the embodiment, the engine 22 and the motor MG1 are connected to the drive shaft 36 connected to the drive wheels 38a and 38b via the planetary gear 30, and the motor MG2 is connected to the drive shaft 36. However, as illustrated in the hybrid vehicle 220 of the modified example of FIG. 8, the motor MG is connected to the drive shaft 36 coupled to the drive wheels 38a and 38b via the transmission 230, and the clutch 229 is connected to the rotation shaft of the motor MG. It is good also as a structure which connects the engine 22 via. In this hybrid vehicle 220, power from the engine 22 is output to the drive shaft 36 via the rotation shaft of the motor MG and the transmission 230, and power from the motor MG is output to the drive shaft via the transmission 230.

  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 engine 22 corresponds to “engine”, the motor MG1 corresponds to “generator”, the battery 50 corresponds to “battery”, the external power supply device 60 corresponds to “external power supply device”, and the HVECU 70 The engine ECU 24 and the motor ECU 40 correspond to “control means”.

  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 manufacturing industry of hybrid vehicles.

  20, 120, 220 Hybrid vehicle, 22 engine, 23 crank position sensor, 24 engine electronic control unit (engine ECU), 26 crankshaft, 30 planetary gear, 36 drive shaft, 37 differential gear, 38a, 38b drive wheel, 39a, 39b wheel, 40 motor electronic control unit (motor ECU), 41, 42 inverter, 43, 44 rotational position detection sensor, 50 battery, 51a voltage sensor, 51b current sensor, 51c temperature sensor, 52 battery electronic control unit (battery) ECU), 54 power line, 60 external power supply device, 62 power sensor, 64 outlet, 70 electronic control unit for hybrid (HVECU), 80 ignition switch, 81 shift lever 82 shift position sensor, 83 accelerator pedal, 84 an accelerator pedal position sensor, 85 brake pedal, 86 a brake pedal position sensor, 88 vehicle speed sensor, MG, MG1, MG2 motor, 229 a clutch, 230 transmission.

Claims (4)

Engine,
A generator that generates power using power from the engine;
A battery connected to a power line with the generator;
An external power supply device for performing external power supply for supplying power from the power line to an external device;
While the vehicle is stopped, the power generation using the power from the engine until the storage ratio of the battery reaches a first threshold value or less until the storage ratio of the battery reaches a second threshold value or more that is larger than the first threshold value. Control means for performing predetermined charging control for controlling the engine and the generator so that the battery is charged by power generation of the machine;
A hybrid vehicle comprising:
When the predetermined charging control is performed while the vehicle is stopped, the control means has a smaller electric power when the external power feeding device performs the external power feeding than when the external power feeding device does not perform the external power feeding. in Ri means der to control such that the battery is charged,
Further, when the predetermined charging control is performed while the vehicle is stopped, the control means is configured to perform the external power feeding by the external power feeding device when deterioration of the battery is not promoted when the external power feeding is performed by the external power feeding device. A means for controlling the battery to be charged with a larger electric power than when the battery is not deteriorated, and when the external power feeding is being performed by the external power feeding device, when deterioration of the battery is promoted. is there,
A hybrid vehicle characterized by that. The hybrid vehicle according to claim 1,
When the external power supply is being performed by the external power supply device while the vehicle is stopped, the control means has the first threshold value and the second threshold value compared to when the external power supply device is not performing the external power supply. A means to increase the threshold,
A hybrid vehicle characterized by that. A hybrid vehicle according to claim 1 or 2,
The control means is means for reducing the allowable input power of the battery when the temperature of the battery exceeds a predetermined temperature as compared to when the temperature of the battery is equal to or lower than the predetermined temperature;
Furthermore, the control means is means for limiting the external power supply when the external power supply is performed by the external power supply device and the allowable input power of the battery becomes smaller than a predetermined power.
A hybrid vehicle characterized by that. A hybrid vehicle according to any one of claims 1 to 3 ,
A planetary gear in which three rotating elements are connected to a rotating shaft of the generator, an output shaft of the engine, and a driving shaft connected to driving wheels;
A motor connected to the power line and capable of inputting and outputting power to the drive shaft;
A hybrid vehicle comprising:

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