JP2010246344A - Power supply device, method of controlling the same, and vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a more appropriate command value used for control of a voltage conversion circuit. <P>SOLUTION: In a slave separating state that a master battery is connected to the inverter side and both of two slave batteries are separated from the inverter side, a voltage command VH* is set so that a voltage VH of a high voltage system may become a target voltage VHtag obtained from a target operating point of a motor (number of rotations, torque) (S120), a value 0 is set into a slave-side power command Pbs* (S220), and a master-side step-up circuit is controlled by using the set voltage command VH*, and a slave-side step-up circuit is controlled by using the set slave-side power command Pbs* (S230, S240). By this, when in the slave separating state, the slave-side power command Pbs* used for the control of the slave-side step-up circuit is set to an appropriate power command so as to further properly control the slave-side step-up circuit. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a power supply device, a control method thereof, and a vehicle.

  Conventionally, as this type of power supply device, a battery (main power storage device), two batteries (sub power storage device), and a power supply that supplies power to an inverter that is connected to the main power storage device via a relay and that drives a motor. The first step-up converter that is connected to the line and performs voltage conversion between the main power storage device and the power supply line by switching of the switching element, and the two sub power storage devices are connected to each other via a relay and connected to the power supply line. Among the two sub power storage devices by switching of the switching element, a device including a second boost converter that performs voltage conversion between a connected sub power storage device and a power supply line has been proposed (for example, Patent Literature 1). 1). In this device, the switching of the second boost converter is stopped when the charging state of the currently used sub power storage device becomes smaller than a predetermined threshold value.

JP 2008-167620 A

  In such a power supply device, when the relay is turned off and the sub power storage device and the second boost converter are disconnected, it is necessary to control the second boost converter so that no current flows through the sub power storage device. Therefore, when the second boost converter is controlled based on the command value, the command value used for controlling the second boost converter in order to properly control the second boost converter when the relay is turned off. It is desirable to make more appropriate.

  The power supply device, the control method thereof, and the vehicle according to the present invention are connected to the low voltage system power line and the high voltage system power line to which the power storage device is connected via the relay, and when the relay is on, The main purpose is to make the command value used for controlling the voltage conversion circuit capable of boosting power and supplying it to the equipment side more appropriate.

  The power supply apparatus, the control method thereof, and the vehicle of the present invention employ the following means in order to achieve the main object described above.

The power supply device of the present invention is
The first power storage means capable of charging / discharging, the second power storage means capable of charging / discharging, the first low-voltage power line to which the first power storage means is connected, and a device that operates with power are connected. A first voltage converting means connected to a high-voltage power line and capable of boosting power from the first power storage means and supplying the boosted power to the device side; and the second power storage means via a relay Connected to the connected second low voltage system power line and the high voltage system power line, the power from the second power storage means can be boosted and supplied to the device side when the relay is on A second voltage conversion means, and a power supply device comprising:
When the relay is on, the voltage command of the first voltage converting means is set so that the voltage of the high voltage system becomes the target voltage required for the operation of the device, and the first power storage means and the second power storage A power command for the second voltage converting means is set so that the power for the equipment required for the operation of the equipment is supplied from the means to the equipment side, and the voltage of the high voltage system is set to the target voltage when the relay is off. Command value setting means for setting the voltage command of the first voltage conversion means so as to become 0 and setting the value 0 to the power command of the second voltage conversion means;
Control means for controlling the first voltage conversion means based on the set voltage command and controlling the second voltage conversion means based on the set power command;
It is a summary to provide.

  In the power supply device of the present invention, when the relay is on, the voltage command of the first voltage conversion means is set so that the high voltage system voltage becomes the target voltage required for the operation of the equipment, and the first power storage means and the first power storage means The power command of the second voltage conversion means is set so that the device power required for the operation of the device is supplied from the second power storage means to the high voltage system, and the first voltage conversion means is controlled based on the set voltage command At the same time, the second voltage conversion means is controlled based on the power command. On the other hand, when the relay is off, the voltage command of the first voltage conversion means is set so that the high voltage system voltage becomes the target voltage, and the value 0 is set in the power command of the second voltage conversion means. The first voltage conversion means is controlled based on the voltage command, and the second voltage conversion means is controlled based on the power command. Thereby, when the relay is OFF, the power command used for the control of the second voltage conversion means can be made more appropriate, and the second voltage conversion means can be controlled more appropriately.

  In such a power supply device of the present invention, the command value setting means includes the power supplied from the first power storage means to the high-voltage power line when the relay is on, and the high voltage from the second power storage means. The distribution ratio, which is the ratio of the power supplied from the second power storage means to the high-voltage power line with respect to the sum of the power supplied to the system power line, is calculated as the amount of power stored in the first power storage means and the second And the target power is set based on the set distribution ratio and the device power, and when the relay is off, the distribution ratio is set to 0 and the target power is set to It may be a means for setting and setting a power command for the second voltage conversion means based on the set target power. In the power supply device of this aspect of the present invention, the command value setting means may be means for setting a value of 0 to the power command regardless of the set target power when the relay is off. it can.

  The power supply device of the present invention further includes a third power storage unit that is connected to the second low-voltage system via a second relay and is chargeable / dischargeable. The command value setting unit includes the relay and the first It may be a means for setting a value of 0 to the power command of the second power conversion means when both of the two relays are off. Here, when both the relay and the second relay are off, the relay is off and the second relay is off from the first state where the relay is on and the second relay is off. This includes when switching to the state.

  The vehicle of the present invention is the power supply device of the present invention according to any one of the above-described aspects, that is, basically the first power storage means capable of charge / discharge, the second power storage means capable of charge / discharge, The first low voltage system power line to which one power storage unit is connected and the high voltage system power line to which a device that operates by power is connected are boosted to increase the power from the first power storage unit. The first voltage conversion means that can be supplied to the device side, and the second power storage means are connected to a second low voltage system power line and the high voltage system power line connected via a relay. And a second voltage conversion unit capable of boosting the electric power from the second power storage unit when the relay is on and supplying the second power conversion unit to the device side, and when the relay is on, The high voltage system voltage becomes the target voltage required for the operation of the equipment. The second voltage setting means sets the voltage command of the first voltage conversion means and supplies the device power required for the operation of the device from the first power storage device and the second power storage device to the device side. A power command for the voltage conversion means is set, and when the relay is off, the voltage command for the first voltage conversion means is set so that the voltage of the high voltage system becomes the target voltage, and the second voltage conversion means Command value setting means for setting a value of 0 to the power command of the power supply, and controlling the first voltage conversion means based on the set voltage command and the second voltage conversion based on the set power command. The gist of the present invention is that a power supply device including control means for controlling the means and an electric motor that outputs motive power for traveling are mounted as the equipment.

  Since the vehicle according to the present invention is equipped with the power supply device according to any one of the above-described aspects, the effect of the power supply device according to the present invention, for example, control of the second voltage conversion means when the relay is off. The power command used in the above can be made more appropriate, and the same effects as the effect that the second voltage conversion means can be controlled more appropriately can be obtained.

The control method of the power supply device of the present invention is as follows:
The first power storage means capable of charging / discharging, the second power storage means capable of charging / discharging, the first low-voltage power line to which the first power storage means is connected, and a device that operates with power are connected. A first voltage converting means connected to a high-voltage power line and capable of boosting power from the first power storage means and supplying the boosted power to the device side; and the second power storage means via a relay Connected to the connected second low voltage system power line and the high voltage system power line, the power from the second power storage means can be boosted and supplied to the device side when the relay is on A second voltage conversion means, and a control method of a power supply device comprising:
(A) When the relay is on, the voltage command of the first voltage conversion means is set so that the voltage of the high voltage system becomes a target voltage required for the operation of the equipment, and the first power storage means and the first power storage means The power command of the second voltage conversion means is set so that the device power required for the operation of the device is supplied from the two power storage means to the device side, and the voltage of the high voltage system is set when the relay is off. Setting the voltage command of the first voltage conversion means to the target voltage and setting the value 0 to the power command of the second voltage conversion means;
(B) controlling the first voltage converter based on the set voltage command and controlling the second voltage converter based on the set power command;
This is the gist.

  In the control method of the power supply device of the present invention, when the relay is on, the voltage command of the first voltage conversion means is set and the first power storage is performed so that the high voltage system voltage becomes the target voltage required for the operation of the device. The power command of the second voltage conversion means is set so that the device power required for the operation of the device is supplied from the means and the second power storage means to the high voltage system, and the first voltage conversion is performed based on the set voltage command The second voltage conversion means is controlled based on the power command while controlling the means. On the other hand, when the relay is off, the voltage command of the first voltage conversion means is set so that the high voltage system voltage becomes the target voltage, and the value 0 is set in the power command of the second voltage conversion means. The first voltage conversion means is controlled based on the voltage command, and the second voltage conversion means is controlled based on the power command. Thereby, when the relay is OFF, the power command used for the control of the second voltage conversion means can be made more appropriate, and the second voltage conversion means can be controlled more appropriately.

1 is a configuration diagram showing an outline of the configuration of a hybrid vehicle 20 equipped with a power supply device as one embodiment of the present invention. It is a flowchart which shows an example of the pressure | voltage rise circuit control routine performed by the hybrid electronic control unit 70 of an Example. 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. FIG. 11 is a configuration diagram illustrating an outline of a configuration of a modified example of an electric vehicle 320.

  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 equipped with a power supply device 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 engine ECU) 24 that controls the drive of the engine 22, and a crank of the engine 22. A planetary gear 30 in which a carrier is connected to the shaft 26 and a ring gear is connected to the drive shaft 32 connected to the drive wheels 39a and 39b via a differential gear 38, and a rotor is configured as a synchronous generator motor, for example. A motor MG1 connected to the sun gear, a motor MG2 configured as a synchronous generator motor and having a rotor connected to the drive shaft 32, inverters 41 and 42 for driving the motors MG1 and MG2, and inverters 41, 42 switching elements (not shown) A motor electronic control unit (hereinafter referred to as a motor ECU) 40 that controls the motors MG1 and MG2 by controlling the driving, a master battery 50, slave batteries 60 and 62 configured as lithium ion secondary batteries, and a master battery 50, a power line (hereinafter referred to as a first low voltage system power line) 59 connected via a system main relay 56, and a power line (hereinafter referred to as a high voltage system power line) 54 to which inverters 41 and 42 are connected; The master side booster circuit 55 that boosts the power from the master battery 50 and can supply it to the inverters 41 and 42 side, and the slave batteries 60 and 62 are connected via the system main relays 66 and 67, respectively. 69 (hereinafter referred to as the second low voltage system power line) and the high voltage system power line. 54, a slave battery that can supply power to the inverters 41 and 42 from the slave battery 60 and 62 connected to the second low voltage system power line 69 (hereinafter referred to as connection-side slave battery). Side booster circuit 65, battery electronic control unit (hereinafter referred to as battery ECU) 52 for managing master battery 50 and slave batteries 60 and 62, and first low voltage system power line 59 via DC / DC converter 96. Connected to the second low voltage system power line 69, an AC external power source connected to the charger 90 and an external power source (for example, a household power source ( AC 100V), etc.) vehicle side connector 92 formed so that external power source side connector 102 connected to 100 can be connected; And a hybrid electronic control unit 70 that communicates with the engine ECU 24, the motor ECU 40, and the battery ECU 52 to control the entire vehicle. Here, the charger 90 is connected to the second low voltage system power line 69 and the vehicle-side connector 92, and is connected to a charging relay, or AC / AC that converts AC power from the external power source 100 to DC power. A DC converter, a DC / DC converter that converts the voltage of the DC power converted by the AC / DC converter and supplies the converted voltage to the second low-voltage system. Hereinafter, for convenience of explanation, the inverters 41 and 42 from the master booster 55 and the slave booster 65 are referred to as a high voltage system, and the master battery 50 from the master booster 55 is referred to as a first low voltage system. The slave battery 60, 62 side from the slave side booster circuit 65 is referred to as a second low voltage system. The power supply device of the embodiment mainly includes a master battery 50, slave batteries 60, 62, a master side booster circuit 55, a slave side booster circuit 65, system main relays 56, 66, 67, and a hybrid electronic control unit 70. Corresponds.

  The battery ECU 52 has signals necessary for managing the master battery 50 and the slave batteries 60 and 62, for example, the terminal voltage Vb 1 from the voltage sensor 51 a installed between the terminals of the master battery 50, and the positive electrode of the master battery 50. Sensor installed between the terminals of the charge / discharge current Ib1 from the current sensor 51b attached to the output terminal on the side, the battery temperature Tb1 from the temperature sensor 51c attached to the master battery 50, and the slave batteries 60 and 62 The inter-terminal voltages Vb2 and Vb3 from 61a and 63a, the charging / discharging currents Ib2 and Ib3 from the current sensors 61b and 63b attached to the positive output terminals of the slave batteries 60 and 62, respectively, to the slave batteries 60 and 62, respectively. Battery temperature T from the attached temperature sensors 61c and 63c 2, such as Tb3 is input, and outputs to the hybrid electronic control unit 70 via communication data relating to the state of the master battery 50 and the slave batteries 60 and 62 as needed. Further, in order to manage the master battery 50, the battery ECU 52 calculates the storage amount SOC1 based on the integrated value of the charge / discharge current Ib1 detected by the current sensor 51b, or calculates the stored storage amount SOC1 and the battery temperature Tb1. In order to calculate the input / output limits Win1 and Wout1, which are the maximum allowable powers that may charge / discharge the master battery 50 based on the above, and to detect the slave batteries 60 and 62, they are detected by the current sensors 61b and 63b. Based on the integrated values of the charge / discharge currents Ib2 and Ib3, the storage amounts SOC2 and SOC3 are calculated, or the input / output limit Win2 of the slave batteries 60 and 62 is calculated based on the calculated storage amounts SOC2 and SOC3 and the battery temperatures Tb2 and Tb3. , Wout2, Win3, Wout3. The input / output limits Win1 and Wout1 of the master battery 50 set the basic values of the input / output limits Win1 and Wout1 based on the battery temperature Tb1, and the input limiting correction coefficient and the input based on the stored amount SOC1 of the master battery 50. It can be set by setting a correction coefficient for restriction and multiplying the basic value of the set input / output restrictions Win1 and Wout1 by the correction coefficient. The input / output limits Win2, Wout2, Win3, Wout3 of the slave batteries 60, 62 can be set similarly to the input / output limits Win1, Wout1 of the master battery 50.

  The hybrid electronic control unit 70 is configured as a microprocessor centered on the CPU 72, and in addition to the CPU 72, a ROM 74 for storing processing programs, a RAM 76 for temporarily storing data, an input / output port and communication not shown. And a port. The hybrid electronic control unit 70 includes a voltage (high voltage system voltage) from a voltage sensor 57a attached between terminals of a smoothing capacitor 57 connected to the positive and negative buses of the high voltage power line 54. ) VH or voltage from the voltage sensor 58a attached between the terminals of the smoothing capacitor 58 connected to the positive and negative buses of the first low voltage system power line 59 (first low voltage system voltage) VL1, a voltage from a voltage sensor 68a (second low voltage system voltage) VL2, attached between terminals of a smoothing capacitor 68 connected to the positive and negative buses of the second low voltage power line 69 The current Icon2 from the current sensor 65a attached to the terminal on the high voltage system power line 54 side of the slave side booster circuit 65, the ignition from the ignition switch 80. A position signal, a shift position SP from the shift position sensor 82 that detects the operation position of the shift lever 81, an accelerator opening Acc from the accelerator pedal position sensor 84 that detects a depression amount of the accelerator pedal 83, and a depression amount of the brake pedal 85 The brake pedal position BP from the brake pedal position sensor 86 for detecting the vehicle speed, 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 switching control signal to the switching element of the master side booster circuit 55, a switching control signal to the switching element of the slave side booster circuit 65, and a drive signal to the system main relays 56, 66, 67 , A control signal to the charger 90 is output via the output port.

  In the hybrid vehicle 20 of the embodiment thus configured, when the external power supply side connector 102 and the vehicle side connector 92 are connected after the vehicle is stopped at the home or a preset charging point, charging in the charger 90 is performed. The main relays 56, 66, 67 are turned on and off, and the AC / DC converter and DC / DC converter in the charger 90 are used to control the master battery 50 and the slave using the power from the external power source 100. The batteries 60 and 62 are set to a fully charged state or a predetermined charged state lower than the fully charged state (for example, a state where the storage amounts SOC1, SOC2 and SOC3 are 80% or 85%). In this way, when the system is started (ignition-on) while the master battery 50 and the slave batteries 60 and 62 are sufficiently charged, the power from the master battery 50 and the slave batteries 60 and 62 is used. Thus, it is possible to travel a certain distance (time) in the motor operation mode in which the vehicle travels using only the power input / output from / to the motor MG2. In addition, since the hybrid vehicle 20 of the embodiment includes the slave batteries 60 and 62 in addition to the master battery 50, the traveling distance (traveling time) in the motor operation mode is made longer than that including only the master battery 50. be able to.

  Further, in the hybrid vehicle 20 of the embodiment, when the system is started (ignition-on) while the master battery 50 and the slave batteries 60 and 62 are sufficiently charged using the power from the external power supply 100, the system main relay 56 is turned on to connect the master battery 50 and the master side booster circuit 55 and the system main relay 66 is turned on to connect the slave battery 60 and the slave side booster circuit 65 (hereinafter this state is referred to as a first connection state). . Then, input / output from the motor MG2 is performed while controlling the master-side booster circuit 55 and the slave-side booster circuit 65 so that the stored amount SOC2 of the slave battery 60 rapidly decreases as compared with the stored amount SOC1 of the master battery 50. The motor operation mode preferentially travels between the motor operation mode that travels using only power and the hybrid operation mode that travels with the output of power from the engine 22, and the charged amount SOC2 of the slave battery 60 is a predetermined value Sref2. (For example, 25%, 30%, 35%, etc.) or less, the system main relay 66 is turned off, the slave battery 60 and the slave booster circuit 65 are disconnected, the system main relay 67 is turned on, and the slave battery 62 and the slave Side booster circuit 65 (hereinafter this state is referred to as a second connection) State), the charged amount SOC1 of the master battery 50 becomes equal to or less than a predetermined value Sref1 (for example, 30%, 35%, 40%, etc.) and the charged amount SOC3 of the slave battery 62 becomes a predetermined value Sref3 (for example, 25% or 30%). The motor operation mode is preferentially run while controlling the master-side booster circuit 55 and the slave-side booster circuit 65 so that the timing becomes equal to or less. When the charged amount SOC1 of the master battery 50 becomes equal to or smaller than the predetermined value Sref1 and the charged amount SOC3 of the slave battery 62 becomes equal to or smaller than the predetermined value Sref3, the system main relay 67 is turned off, and the slave battery 62 and the slave booster circuit 65 are connected. After disconnecting, the engine 22 travels while intermittently operating the engine 22 based on the required power required for the vehicle using only the master battery 50 of the master battery 50 and the slave batteries 60 and 62. Hereinafter, when the system main relays 66 and 67 are both turned off when switching from the first connected state to the second connected state, the charged amount SOC1 of the master battery 50 becomes equal to or less than the predetermined value Sref1, and the charged amount of the slave battery 62 A state in which the SOC 3 becomes equal to or lower than the predetermined value Sref3 and the system main relay 67 is turned off is called a slave disconnection state.

  Further, in the hybrid vehicle 20 of the embodiment, when traveling in the motor operation mode, the hybrid electronic control unit 70 transmits an operation stop signal for stopping the operation of the engine 22 to the engine ECU 24, and a torque command Tm1 for the motor MG1. A value 0 is set for *, and a required torque Tr * set according to the accelerator opening Acc from the accelerator pedal position sensor 84 and the vehicle speed V from the vehicle speed sensor 88 is set to control input / output limits Win and Wout described later. The torque command Tm2 * of the motor MG2 is set within the range, and the set torque commands Tm1 * and Tm2 * are transmitted to the motor ECU 40. The engine ECU 24 that has received the operation stop signal stops the operation of the engine 22, and the motor ECU 40 that has received the torque commands Tm1 * and Tm2 * receives the inverter 41 so that the motors MG1 and MG2 are driven by the torque commands Tm1 * and Tm2 *. , 42 is subjected to switching control. On the other hand, when traveling in the hybrid operation mode, the hybrid electronic control unit 70 rotates the required torque Tr * to the rotational speed of the drive shaft 32 (the rotational speed obtained by multiplying the rotational speed Nm2 of the motor MG2 and the vehicle speed V by a conversion factor). To calculate the driving power Pr * required for driving, and from the calculated driving power Pr *, the charging / discharging required power Pb * required by the master battery 50 and the slave batteries 60, 62 (positive on the discharging side, charging) The required power Pe * required for the engine 22 is calculated by subtracting the negative power from the negative side), and the operation line as the relationship between the rotational speed and torque of the engine 22 that can efficiently output the required power Pe * from the engine 22 A target rotational speed Ne * and a target torque Te * of the engine 22 are set and controlled based on (for example, an optimum fuel efficiency operation line) and the required power Pe *. The torque command Tm1 * of the motor MG1 is set and the motor MG1 is torqued by the rotational speed feedback control so that the rotational speed Ne of the engine 22 becomes the target rotational speed Ne * within the range of the input / output limits Win and Wout. The torque obtained by subtracting the torque acting on the drive shaft 32 via the planetary gear 30 from the required torque Tr * when driven by the command Tm1 * is set as the torque command Tm2 * of the motor MG2, and the target rotational speed Ne * and the target torque Te are set. * Is transmitted to the engine ECU 24, and torque commands Tm1 * and Tm2 * are transmitted to the motor ECU 40. The engine ECU 24 that has received the target rotational speed Ne * and the target torque Te * controls the intake air amount of the engine 22 and the fuel so that the engine 22 is operated at the operating point consisting of the target rotational speed Ne * and the target torque Te *. The motor ECU 40 that executes the injection control, the ignition control, etc., and receives the torque commands Tm1 *, Tm2 * of the motors MG1, MG2, the inverters 41, 42 so that the motors MG1, MG2 are driven by the torque commands Tm1 *, Tm2 *. Switching control of the switching elements. In the embodiment, the charge / discharge required power Pb * when traveling in the hybrid operation mode is based on the storage amount SOC1 of the master battery 50 and the connection-side slave battery (slave battery 60 in the first connection state, slave in the second connection state). The battery 62) is set based on the charged amount. Further, the control input / output limits Win and Wout when traveling in the motor operation mode and the hybrid operation mode control the sum of the input limit Win1 of the master battery 50 and the input limit Win2 of the slave battery 60 in the first connection state. And the sum of the output limit Wout1 of the master battery 50 and the output limit Wout2 of the slave battery 60 is set as the control output limit Wout. When the second connection state is established, the input limit Win1 of the master battery 50 is set. The sum of the input limit Win3 of the slave battery 62 is set as the control input limit Win, and the sum of the output limit Wout1 of the master battery 50 and the output limit Wout3 of the slave battery 62 is set as the control output limit Wout to disconnect the slave. State It was assumed to set input and output limits Win1, Woutl of the master battery 50 control output limits Win, as Wout to.

  Next, the operation of the hybrid vehicle 20 of the embodiment thus configured, particularly the control of the master side booster circuit 55 and the slave side booster circuit 65 will be described. FIG. 2 is a flowchart showing an example of a booster circuit control routine executed by the hybrid electronic control unit 70. This routine is repeatedly executed every predetermined time.

  When the step-up circuit control routine is executed, the CPU 72 of the hybrid electronic control unit 70 first starts the torque commands Tm1 *, Tm2 * of the motors MG1, MG2, the rotational speeds Nm1, Nm2, the master battery 50, and the slave batteries 60, 62. The necessary amount of data for control, such as the difference in storage amount ΔSOC1, ΔSOC2, ΔSOC3, high voltage VH from voltage sensor 57a, current Icon from current sensor 65a, slave disconnection flag F1, first connection state flag F2, etc. Processing is executed (step S100). Here, the torque commands Tm1 * and Tm2 * of the motors MG1 and MG2 are input as set by a drive control routine (not shown). Further, the rotational speeds Nm1 and Nm2 of the motors MG1 and MG2 are input from the motor ECU 40 by communication from those calculated based on the rotational positions of the rotors of the motors MG1 and MG2 detected by the rotational position detection sensors 43 and 44. It was supposed to be. The storage amount differences ΔSOC1, ΔSOC2, and ΔSOC3 of the master battery 50 and the slave batteries 60 and 62 are respectively the difference between the storage amount SOC1 of the master battery 50 and the predetermined value Sref1, the difference between the SOC2 of the slave battery 60 and the predetermined value Sref2, and the slave The value calculated as the difference between the charged amount SOC3 of the battery 62 and the predetermined value Sref3 is input. The stored amounts SOC1, SOC2, and SOC3 of the master battery 50 and the slave batteries 60 and 62 are calculated from the battery ECU 52 based on the integrated values of the charge / discharge currents Ib1, Ib2, and Ib3 detected by the current sensor. The input was made by communication. The slave disconnection flag F1 is set to 0 when in the first connection state or the second connection state, and when transitioning from the first connection state or the second connection state to the slave disconnection state (from the first connection state to the second connection state). The value 1 is set when the system main relay 66 is turned off to switch to the state, the value 0 is set when the system main relay 67 is turned on to enter the second connection state, and the system main relay is set in the second connection state. The value 1 is set when turning off 67. The first connection state flag F2 is set to value 1 when in the first connection state, and is set to value 0 when not in the first connection state.

  When the data is input in this way, the target voltage VHtag of the high voltage system power line 54 is set based on the input torque commands Tm1 *, Tm2 * and the rotational speeds Nm1, Nm2 of the motors MG1, MG2 (step S110). A voltage command VH * used for controlling the master side booster circuit 55 is set by voltage feedback control so that the voltage VH of the voltage system becomes the target voltage VHtag (step S120). Here, in the embodiment, the target voltage VHtag is a voltage that can drive the motor MG1 at a target operating point (torque command Tm1 *, rotation speed Nm1) of the motor MG1 and a target operating point (torque command Tm2 *, rotation speed) of the motor MG2. Nm2) is set to the larger voltage of the voltages that can drive the motor MG2.

  Subsequently, the value of the slave disconnection flag F1 is checked (step S130). When the slave disconnection flag F1 is 0, the value of the first connection state flag F2 is checked (step S140). When the first connection state flag F2 is a value 1, it is determined that the first connection state is present, and the master battery 50 determines whether the master battery 50 or the slave batteries 60, 62 has a stored charge amount difference ΔSOC1, ΔSOC2, ΔSOC3. A distribution ratio Dr, which is a ratio of the power supplied from the slave battery 60 to the motors MG1 and MG2 to the sum of the power supplied to the motors MG1 and MG2 and the power supplied from the slave battery 60 to the motors MG1 and MG2, is Calculated by (1) (step S150), and when the first connection state flag F2 is 0, it is determined that the connection state is the second connection state, and based on the charged amount difference ΔSOC1, ΔSOC3 between the master battery 50 and the slave battery 62 The distribution ratio Dr is calculated by equation (2) (step S160). In this way, the distribution ratio Dr is calculated when the charged amount SOC1 of the master battery 50 becomes equal to or lower than the predetermined value Sref1 and the charged amount SOC3 of the slave battery 62 becomes equal to or lower than the predetermined value Sref3 in the second connection state. This is to align the timing.

Dr = (ΔSOC2 + ΔSOC3) / (ΔSOC1 + ΔSOC2 + ΔSOC3) (1)
Dr = ΔSOC3 / (ΔSOC1 + ΔSOC3) (2)

  Then, using the torque commands Tm1 * and Tm2 * of the motors MG1 and MG2 and the rotational speeds Nm1 and Nm2, the connection is made by multiplying the sum Pm of the power consumption of the motors MG1 and MG2 obtained by the following equation (3) by the distribution ratio Dr. The slave side target power Pbstag to be supplied from the side slave battery to the motors MG1 and MG2 is calculated (step S180), and the calculated slave side target power Pbstag falls within the input / output limit range of the connection side slave battery and the motor MG1. , The slave side target power Pbstag is corrected as necessary so that the value obtained by subtracting the slave side target power Pbstag from the sum Pm of the power consumption of MG2 is within the range of the input / output limits Win1, Wout1 of the master battery 50 (step S190). ). The slave-side target power Pbstag is corrected, for example, by limiting the slave-side target power Pbstag by the input / output limit of the connection-side slave battery, or the slave-side target power Pbstag is within the range of the input-output limit of the connection-side slave battery. At the same time, the slave is set such that the sum of the power consumption Pm of the motors MG1 and MG2 minus the slave side target power Pbstag (hereinafter referred to as the master side assumed power Pbmttag) is within the range of the input / output limits Win1 and Wout1 of the master battery 50. This process adjusts the distribution of the target power Pbstag on the side and the assumed power Pbmtag on the master side.

  Pm = Tm1 * ・ Nm1 + Tm2 * ・ Nm2 (3)

  Then, the value of the slave disconnection flag F1 is checked (step S200). Since it is considered that the slave disconnection flag F1 is 0, the connection-side slave obtained as the product of the voltage VH of the high voltage system and the current Icon2 is obtained. The power of the slave side booster circuit 65 is controlled by power feedback control so that the power (hereinafter referred to as slave side power) Pbs supplied from the battery to the motors MG1 and MG2 becomes the slave side target power Pbstag corrected as necessary. The slave side power command Pbs * used for control is set (step S210), and the master side booster circuit 55 is controlled using the voltage command VH * so that the voltage VH of the high voltage system power line 54 becomes the target voltage VHtag ( Step S230), the slave side power Pbs is the slave target power Pbst. And it controls the slave side step-up circuit 65 with a slave side power command Pbs * so as to be g (Step S240), and terminates the boost circuit control routine. By such control, adjustment of the voltage VH of the high voltage system power line 54, power supplied from the master battery 50 to the inverters 41 and 42, and power supplied from the connection-side slave battery to the inverters 41 and 42 are adjusted. be able to.

  When the slave disconnection flag F1 is 1 in step S120, the distribution ratio Dr is set to 0 (step S170), and the slave side target power Pbstag is obtained by multiplying the sum Pm of the power consumption of the motors MG1 and MG2 by the distribution ratio Dr. Calculate (step S180), correct the slave-side target power Pbstag as necessary (step S190), and check the value of the slave disconnection state flag F1 (step S200). Therefore, the slave side power command Pbs * is set to 0 (step S220), the master side booster circuit 55 is controlled using the voltage command VH * (step S230), and the slave side power command Pbs * ( In this case, the slave side booster circuit 65 is controlled using the value 0) (step S240). , To end the step-up circuit control routine. In this case, the driving of the slave side booster circuit 65 is stopped so that power is not exchanged between the second low voltage system power line 69 and the inverters 41 and 42 side. By controlling the slave side booster circuit 65 based on the slave side power command Pbs * in which the value 0 is set in this way, power is not exchanged between the second low voltage system power line 69 and the inverters 41 and 42 side. Can be. Usually, in such a hybrid vehicle 20, the engine 22, the motors MG1, MG2, the master side booster circuit 55, the slave side booster circuit 65, and the like are controlled based on command values, and various command values (for example, distribution) The ratio Dr, the power command Pbs *, and the like) may be used for other control (not shown) (for example, abnormality determination processing using a difference between the command value, the detected value, and the actual value). It is desirable to set a more appropriate value. In the embodiment, in consideration of this, when the slave disconnection flag F1 is 1, the value 0 is set to the distribution ratio Dr and the value 0 is set to the power command Pbs *. Thereby, slave side electric power command Pbs * can be made more appropriate, and control of slave side boost circuit 65 can be performed more appropriately. In addition, in the embodiment, considering that there is a possibility that the power command Pbs * may not become 0 by the process of step S190 even if the value 0 is set to the distribution ratio Dr in the process of step S170, the power command Pbs *. The value 0 is set in itself, and the slave side booster circuit 65 is controlled using this value. As a result, the power command Pbs * can be more reliably set to the value 0 and used to control the slave side booster circuit 65.

  According to the hybrid vehicle 20 of the embodiment described above, the master battery 50 is connected to the inverters 41 and 42 side, and both of the slave batteries 60 and 62 are disconnected from the inverters 41 and 42 side. The voltage command VH * used for control of the master side booster circuit 55 is set so that the voltage VH becomes the target voltage VHtag obtained from the target operating point (rotation speed, torque) of the motors MG1 and MG2, and control of the slave side booster circuit 65 is performed. Is set to 0 for the slave side power command Pbs * used for controlling the master side booster circuit 55 using the set voltage command VH * and the slave side booster circuit 65 is set using the set slave side power command Pbs *. Therefore, the slave used to control the slave side booster circuit 65 when the slave is disconnected. The side power command Pbs * a more appropriate ones, it is possible to control the slave side step-up circuit 65 more properly.

  In the hybrid vehicle 20 of the embodiment, when the slave disconnection flag F1 is the value 1, the value 0 is set in the distribution ratio Dr, and then the value 0 is set in the slave-side power command Pbs *. The value 0 may be set to the slave power command Pbs * without setting the value 0.

  In the hybrid vehicle 20 of the embodiment, the master battery 50, the master side booster circuit 55, the slave batteries 60 and 62, and the slave side booster circuit 65 are provided. However, the number of slave batteries is not limited to two, but one or three. It is good also as what is provided above.

  In the hybrid vehicle 20 of the embodiment, the power from the engine 22 is output to the drive shaft 32 connected to the drive wheels 39a and 39b via the planetary gear 30, and the power from the motor MG2 is output to the drive shaft 32. However, as illustrated in the hybrid vehicle 120 of the modified example of FIG. 3, the power from the engine 22 is output to the drive shaft 32 connected to the drive wheels 39a and 39b via the planetary gear 30, and the power from the motor MG2 is output. It may be output to an axle (an axle to which wheels 39c and 39d are connected) different from an axle to which the driving shaft 32 is connected (an axle to which the drive wheels 39a and 39b are connected).

  In the hybrid vehicle 20 of the embodiment, the power from the engine 22 is output to the drive shaft 32 connected to the drive wheels 39a and 39b via the planetary gear 30, and the power from the motor MG2 is output to the drive shaft 32. However, as illustrated in the hybrid vehicle 220 of the modified example of FIG. 4, a motor MG is attached to a drive shaft connected to the drive wheels 39a and 39b via a transmission 230, and a rotation shaft of the motor MG is connected to a rotation shaft via a clutch 228. The engine 22 is connected, and the power from the engine 22 is output to the drive shaft via the rotating shaft of the motor MG and the transmission 230, and the power from the motor MG is output to the drive shaft via the transmission 230. It is good also as what to do.

  In the embodiment, the present invention is applied to the hybrid vehicle 20 including the engine 22 and the motor MG1 connected to the drive shaft 32 via the planetary gear 30, and the motor MG2 connected to the drive shaft 32. As exemplified in the modified electric vehicle 320, the electric vehicle 320 may be applied to a simple electric vehicle including a motor MG that outputs driving power.

  Moreover, it is not limited to what is applied to such a motor vehicle, The form of the power supply device mounted in moving bodies, such as vehicles other than a motor vehicle, a ship, and an aircraft, and the power supply device incorporated in the equipment which does not move, such as construction facilities It does not matter as the form. Furthermore, it is good also as a form of the control method of such a power supply device.

  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 master battery 50 corresponds to the “first power storage unit”, the slave battery 60 corresponds to the “second power storage unit”, and the master side booster circuit 55 corresponds to the “first voltage conversion unit”. The slave booster circuit 65 corresponds to the “second voltage conversion means”, and the master battery 50 and the slave battery 60 are connected to the inverters 41 and 42 side. 62 is connected to the inverters 41 and 42 in the second connection state, so that the high voltage system voltage VH becomes the target voltage VHtag obtained from the target operating point (rotation speed, torque) of the motors MG1 and MG2. The voltage command VH * used for controlling the side booster circuit 55 is set, and the charged amount differences ΔSOC1, ΔSOC2, ΔS of the master battery 50 and the slave batteries 60, 62 are set. The slave-side booster circuit 65 sets the slave-side target power Pbstag from the distribution ratio Dr set based on C3 and the sum Pm of the power consumption of the motors MG1 and MG2 so that the slave-side power Pbs becomes the slave-side target power Pbstag. In the slave disconnected state in which the slave power command Pbs * used for control is set, the master battery 50 is connected to the inverters 41 and 42, and both the slave batteries 60 and 62 are disconnected from the inverters 41 and 42, the high voltage system The voltage command VH * used for control of the master side booster circuit 55 is set so that the voltage VH becomes the target voltage VHtag obtained from the target operating point (rotation speed, torque) of the motors MG1 and MG2, and control of the slave side booster circuit 65 is performed. 2 for setting the value 0 to the slave side power command Pbs * used for the The hybrid electronic control unit 70 that executes the processing of steps S110 to S220 of the road control routine corresponds to “command value setting means”, and controls and sets the master booster circuit 55 using the set voltage command VH *. The hybrid electronic control unit 70 that executes the processes of steps S230 and S240 of the booster circuit control routine of FIG. 2 for controlling the slave booster circuit 65 using the slave power command Pbs * corresponds to the “control means”. The slave battery 62 corresponds to “third power storage unit”, and the motor MG2 corresponds to “device”.

Here, the “first power storage means” is not limited to the master battery 50 configured as a lithium ion secondary battery, and may be a chargeable / dischargeable battery such as a nickel metal hydride battery, a lead storage battery, or a capacitor. It does not matter as long as it is anything. The “second power storage means” is not limited to the slave battery 60 configured as a lithium ion secondary battery, and any battery that can be charged and discharged, such as a nickel metal hydride battery, a lead storage battery, or a capacitor. It does not matter. The “first voltage conversion means” is not limited to the master-side booster circuit 55, but is connected to a first low-voltage power line to which the first power storage means is connected and a device that operates with power. Any device can be used as long as it is connected to the high-voltage power line and can boost the power from the first power storage means and supply it to the device side. The “second voltage conversion means” is not limited to the slave side booster circuit 65, and the second low voltage system power line and the high voltage system to which the second power storage means is connected via a relay. Any device can be used as long as it can be connected to the power line and the power from the second power storage means can be boosted and supplied to the device side when the relay is on. As the “command value setting means”, the first connection state in which the master battery 50 and the slave battery 60 are connected to the inverters 41 and 42 side, or the master battery 50 and the slave battery 62 are connected to the inverters 41 and 42 side. In the second connection state, the voltage command VH used for controlling the master side booster circuit 55 so that the high voltage system voltage VH becomes the target voltage VHtag obtained from the target operating point (rotation speed, torque) of the motors MG1, MG2. * Is set, and the slave-side target power Pbstag is calculated from the distribution ratio Dr set based on the storage amount differences ΔSOC1, ΔSOC2, ΔSOC3 of the master battery 50 and the slave batteries 60, 62 and the sum Pm of the power consumption of the motors MG1, MG2. And set the slave side power Pbs to the slave side target power Pbstag. Slave-side power command Pbs * used for control of the booster-side booster circuit 65 is set, the master battery 50 is connected to the inverters 41 and 42, and both slave batteries 60 and 62 are disconnected from the inverters 41 and 42. Then, the voltage command VH * used for control of the master side booster circuit 55 is set so that the high voltage system voltage VH becomes the target voltage VHtag obtained from the target operating point (rotation speed, torque) of the motors MG1 and MG2. The slave side power command Pbs * used for the control of the side booster circuit 65 is not limited to a value set to 0. When the relay is on, the high voltage system voltage becomes the target voltage required for the operation of the device. The voltage command for the first voltage conversion means is set and the first power storage means and the second power storage means are required for the operation of the device. The power command of the second voltage conversion means is set so that the device power is supplied to the device side, and when the relay is off, the voltage command of the first voltage conversion means is set so that the high voltage system voltage becomes the target voltage. Any value can be used as long as the value 0 is set in the power command of the second voltage conversion means. The "control means" is limited to one that controls the master side booster circuit 55 using the set voltage command VH * and controls the slave side booster circuit 65 using the set slave side power command Pbs *. Instead, any device may be used as long as it controls the first voltage conversion means based on the voltage command and controls the second voltage conversion means based on the power command. The “third power storage means” is not limited to the slave battery 62 configured as a lithium ion secondary battery, and any battery that can be charged and discharged, such as a nickel metal hydride battery, a lead storage battery, or a capacitor. It does not matter. The “device” is not limited to the motor MG2, and any device that operates with electric power 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 power supply device and vehicle manufacturing industries.

  20, 120, 220 Hybrid vehicle, 22 engine, 24 engine electronic control unit (engine ECU), 26 crankshaft, 28 damper, 30 planetary gear, 32 drive shaft, 38 differential gear, 39a, 39b drive wheel, 39c, 39d wheel 40, motor electronic control unit (motor ECU), 41, 42 inverter, 50 master battery, 51, 61, 63 temperature sensor, 52 battery electronic control unit (battery ECU), 54 high voltage system power line, 55 master side Booster circuit, 56, 66, 67 System main relay, 57, 58, 68 capacitor, 57a, 58a, 68a Voltage sensor, 59 First low voltage system power line, 60, 62 Slave battery, 65 Slave booster circuit, 69 2 Low voltage system power line, 70 Hybrid electronic control unit, 72 CPU, 74 ROM, 76 RAM, 80 ignition switch, 81 shift lever, 82 shift position sensor, 83 accelerator pedal, 84 accelerator pedal position sensor, 85 brake pedal, 86 Brake pedal position sensor, 88 Vehicle speed sensor, 90 Battery charger, 92 Vehicle side connector, 96 DC / DC converter, 98 Low voltage battery, 100 External power source, 102 External power source side connector, 228 Clutch, 230 Transmission, 320 Electric vehicle, MG1, MG2, MG motor.

Claims (5)

The first power storage means capable of charging / discharging, the second power storage means capable of charging / discharging, the first low-voltage power line to which the first power storage means is connected, and a device that operates with power are connected. A first voltage converting means connected to a high-voltage power line and capable of boosting power from the first power storage means and supplying the boosted power to the device side; and the second power storage means via a relay Connected to the connected second low voltage system power line and the high voltage system power line, the power from the second power storage means can be boosted and supplied to the device side when the relay is on A second voltage conversion means, and a power supply device comprising:
When the relay is on, the voltage command of the first voltage converting means is set so that the voltage of the high voltage system becomes the target voltage required for the operation of the device, and the first power storage means and the second power storage A power command for the second voltage converting means is set so that the power for the equipment required for the operation of the equipment is supplied from the means to the equipment side, and the voltage of the high voltage system is set to the target voltage when the relay is off. Command value setting means for setting the voltage command of the first voltage conversion means so as to become 0 and setting the value 0 to the power command of the second voltage conversion means;
Control means for controlling the first voltage conversion means based on the set voltage command and controlling the second voltage conversion means based on the set power command;
A power supply device comprising: The power supply device according to claim 1,
The command value setting means includes power supplied from the first power storage means to the high voltage power line and power supplied from the second power storage means to the high voltage power line when the relay is on. The distribution ratio, which is the ratio of the power supplied from the second power storage means to the high-voltage power line with respect to the sum of the above and the power storage amount of the first power storage means, And setting a target power based on the set distribution ratio and the device power, and setting the target power with the distribution ratio set to 0 when the relay is off. Is a means for setting a power command of the second voltage conversion means based on
Power supply. The power supply device according to claim 1 or 2,
A third power storage means connected to the second low voltage system via a second relay and chargeable / dischargeable;
The command value setting means is means for setting a value of 0 to the power command of the second power conversion means when both the relay and the second relay are off.
Power supply.   A vehicle equipped with the power supply device according to any one of claims 1 to 3 and an electric motor that outputs driving power as the device. The first power storage means capable of charging / discharging, the second power storage means capable of charging / discharging, the first low-voltage power line to which the first power storage means is connected, and a device that operates with power are connected. A first voltage converting means connected to a high-voltage power line and capable of boosting power from the first power storage means and supplying the boosted power to the device side; and the second power storage means via a relay Connected to the connected second low voltage system power line and the high voltage system power line, the power from the second power storage means can be boosted and supplied to the device side when the relay is on A second voltage conversion means, and a control method of a power supply device comprising:
(A) When the relay is on, the voltage command of the first voltage conversion means is set so that the voltage of the high voltage system becomes a target voltage required for the operation of the equipment, and the first power storage means and the first power storage means The power command of the second voltage conversion means is set so that the device power required for the operation of the device is supplied from the two power storage means to the device side, and the voltage of the high voltage system is set when the relay is off. Setting the voltage command of the first voltage conversion means to the target voltage and setting the value 0 to the power command of the second voltage conversion means;
(B) controlling the first voltage converter based on the set voltage command and controlling the second voltage converter based on the set power command;
Control method of power supply.

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