JP2021093897A - Vehicle control device - Google Patents

Abstract

To provide a vehicle control device that can properly protect a power storage battery.SOLUTION: A EVECU 31 as a vehicle control device uses energy input from a drive wheel 11 to a rotary electric machine 20 to set a regenerative power limit value of an inverter 21 when regenerative power generation of a rotary electric machine 20 is performed on the basis of a charging power limit value Win of a power storage battery 22, and the inverter 21 is controlled such that the regenerative power output from the inverter 21 is equal to or less than the regenerative power limit value. When the EVECU 31 determines that the power storage battery 22 is in a fully charged state, the EVECU 31 sets the regenerative power limit value smaller than when it is determined that the power storage battery 22 is not in a fully charged state.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vehicle control device.

Examples of this type of control device include a power storage device, an inverter electrically connected to the power storage device, a rotary electric machine electrically connected to the inverter, a power storage device, and an inverter, as seen in Patent Document 1. It is known to be applied to vehicles equipped with an electrical load that is electrically connected to an inverter. In this control device, the regenerative power generation of the rotary electric machine is performed by utilizing the energy input from the drive wheels to the rotary electric machine. Then, when this regenerative power generation is carried out, the inverter is controlled so that the regenerative power output from the inverter becomes equal to or less than the regenerative power limit value set based on the charging power limit value of the power storage device.

Japanese Patent No. 5347438

When regenerative power generation is performed, if the power storage device is fully charged, the power storage device is likely to be overcharged, and there is a concern that the power storage device cannot be protected.

An object of the present invention is to provide a vehicle control device capable of appropriately protecting a power storage device.

The first invention is a power storage device and
An inverter electrically connected to the power storage device and
A rotary electric machine that is electrically connected to the inverter
In a vehicle control device applied to a vehicle including an electric load electrically connected to the power storage device.
Setting to set the regenerative power limit value of the inverter when the regenerative power generation of the rotary electric machine is performed by using the energy input from the drive wheel to the rotary electric machine based on the charge power limit value of the power storage device. Department and
A control unit that controls the inverter so that the regenerative power output from the inverter is equal to or less than the regenerative power limit value.
A charging state determining unit for determining whether or not the power storage device is in a fully charged state is provided.
When it is determined that the power storage device is in the fully charged state, the setting unit sets the regenerative power limit value smaller than when it is determined that the power storage device is not in the fully charged state.

In the first invention, when it is determined that the power storage device is in the fully charged state, the regenerative power limit value is set smaller than when it is determined that the power storage device is not in the fully charged state. With this setting, it is possible to prevent the power storage device from being overcharged when the power storage device is fully charged. As a result, the power storage device can be properly protected.

Here, the first invention can be embodied as in the second invention, for example. The second invention includes a load power calculation unit that calculates the power consumption of the electric load, and a load power calculation unit.
A power loss calculation unit for calculating the power loss generated by the inverter and the rotary electric machine is provided.
The setting unit
When it is determined that the power storage device is not in the fully charged state, the charging is performed based on the power consumption calculated by the load power calculation unit, the power loss calculated by the power loss calculation unit, and the charge power limit value. Set the regenerative power limit value that is larger than the power limit value,
When it is determined that the power storage device is in a fully charged state, only the charging power limit value is applied among the power consumption of the electric load, the power loss generated by the inverter and the regenerative electric machine, and the charging power limit value. Based on this, the regenerative power limit value is set.

In the second invention, the power consumption of the electric load is calculated, and the power loss generated by the inverter and the rotary electric machine is calculated.

Here, for example, due to the calculation error or calculation delay of each calculation unit, the error between the calculated power consumption and the actual power consumption of the electric load becomes large, or the calculated power loss and the actual loss The error with the power can be large.

When the calculated value of power consumption including a large error and the calculated value of power loss including a large error are used to set the regenerative power limit value, the regenerative power output from the inverter becomes larger than the appropriate value. The actual charging power of the power storage device may exceed the charging power limit value. In this case, it may not be possible to protect the power storage device. Further, when the charging state of the power storage device is fully charged and the actual charging power of the power storage device exceeds the charging power limit value, the power storage device becomes overcharged and it becomes impossible to protect the power storage device. obtain.

Therefore, in the second invention, when it is determined that the power storage device is in a fully charged state, the charging power limit value is among the power consumption of the electric load, the power loss generated by the inverter and the regenerative electric machine, and the charging power limit value. The regenerative power limit value is set based only on. Therefore, it is possible to reduce the influence of the size error that may occur on the setting of the regenerative power limit value. As a result, it is possible to prevent the actual charging power of the power storage device from exceeding the charging power limit value or the power storage device from being overcharged.

Here, the second invention can be embodied as in the third invention, for example. In the third invention, the power consumption of the electric load is calculated based on the detected value of the load current sensor, and the power loss generated in the inverter and the rotary electric machine is calculated based on the detected value of the power supply current sensor.

Here, due to the detection error of the detection value of the load current sensor, the error between the calculated power consumption and the actual power consumption of the electric load can be increased. Further, the error between the calculated power loss and the actual power loss may increase due to the detection error of the detection value of the power supply current sensor.

When the power consumption calculated based on the detected value including a large error and the power loss calculated based on the detected value including a large error are used for setting the regenerative power limit value, the output is output from the inverter. There is a risk that the regenerative power generated will be larger than the appropriate value, and the actual charging power of the power storage device will exceed the charging power limit value. In this case, it may not be possible to protect the power storage device. Further, when the charging state of the power storage device is fully charged and the actual charging power of the power storage device exceeds the charging power limit value, the power storage device becomes overcharged and it becomes impossible to protect the power storage device. obtain. In this regard, according to the third invention, since the influence of the detection error and the like on the setting of the regenerative power limit value can be reduced, the actual charging power of the power storage device exceeds the charging power limit value, or the power storage device is overcharged. It can be prevented from becoming.

The whole block diagram of the in-vehicle system which concerns on one Embodiment. The flowchart which shows the procedure of the process performed by the EVECU. Overall configuration diagram of the in-vehicle system according to other embodiments.

Hereinafter, an embodiment in which the control device according to the present invention is embodied will be described with reference to the drawings. The control device of the present embodiment is mounted on a vehicle such as an electric vehicle having only a rotary electric machine as a traveling power source.

As shown in FIG. 1, the vehicle 10 includes a rotary electric machine 20, an inverter 21, and a storage battery 22 as a power storage device. In the present embodiment, the rotary electric machine 20 has three-phase windings and is, for example, a permanent magnet type synchronous machine. The rotor of the rotary electric machine 20 is capable of transmitting power to the drive wheels 11 of the vehicle 10. That is, the rotary electric machine 20 serves as a traveling power source for the vehicle 10.

The inverter 21 is electrically connected to the stator winding of the rotary electric machine 20. The inverter 21 has switches for the upper and lower arms. The storage battery 22 is an assembled battery composed of a series connection of a plurality of cells, and is a secondary battery such as a lithium ion storage battery or a nickel hydrogen storage battery, for example.

The vehicle 10 includes a battery ECU 30 that monitors the storage battery 22 and an EV ECU 31. The battery ECU 30 detects the voltage of each cell of the storage battery 22, the battery temperature which is the temperature of the storage battery 22, and the like. The battery ECU 30 sets the charging power limit value Win of the storage battery 22 and calculates the charging rate (SOC) of the storage battery 22 based on the detected values. The charging power limit value Win is an allowable upper limit value of the power that can be charged to the storage battery 22, and is a value set from the viewpoint of protecting the storage battery 22. The charging power limit value Win is stored in a memory as a storage unit included in the battery ECU 30 as map information related to the battery temperature, for example. The memory is a non-transitional substantive recording medium other than ROM (for example, non-volatile memory other than ROM). The battery ECU 30 transmits the set charging power limit value Win, the calculated SOC, and the like to the EV ECU 31.

The vehicle 10 includes a DCDC converter 41 as an electric load, an electric compressor 42, an auxiliary inverter 43, and a heater 44.

The DCDC converter 41 steps down the output voltage of the storage battery 22 and supplies it to an in-vehicle low-voltage load (not shown). The low voltage load includes, for example, at least one of a low voltage storage battery and a low voltage electric load. The low-voltage storage battery is a storage battery having a lower output voltage than the storage battery 22, and is, for example, a lead storage battery.

The electric compressor 42 constitutes an air conditioner in the vehicle interior and is driven by being supplied with power from the storage battery 22 in order to circulate the refrigerant in the in-vehicle refrigeration cycle. The auxiliary inverter 43 converts the DC power supplied from the storage battery 22 into AC power. The converted AC voltage is supplied to, for example, an electric device used in a vehicle. The heater 44 constitutes, for example, an air conditioner in a vehicle interior, and is supplied with power from a storage battery 22 to generate heat.

The vehicle 10 includes a phase current sensor 50, a power supply current sensor 51, a power supply voltage sensor 52, and a rotation angle sensor 55. The phase current sensor 50 detects the phase currents of at least two phases of the rotary electric machine 20. The power supply current sensor 51 detects the direct current flowing through the inverter 21, and the power supply voltage sensor 52 detects the power supply voltage applied to the inverter 21. The rotation angle sensor 55 detects the rotation angle (electrical angle) of the rotor of the rotary electric machine 20, and is, for example, a resolver.

The vehicle 10 includes first to fourth load current sensors 53a to 53d and first to fourth load voltage sensors 54a to 54d. The first load current sensor 53a detects the current supplied to the DCDC converter 41, and the first load voltage sensor 54a detects the voltage supplied to the DCDC converter 41. The second load current sensor 53b detects the current supplied to the electric compressor 42, and the second load voltage sensor 54b detects the voltage supplied to the electric compressor 42. The third load current sensor 53c detects the current supplied to the auxiliary inverter 43, and the third load voltage sensor 54c detects the voltage supplied to the auxiliary inverter 43. The fourth load current sensor 53d detects the current supplied to the heater 44, and the fourth load voltage sensor 54d detects the voltage supplied to the heater 44. The detected values of the sensors 50 to 52, 53a to 53d, 54a to 54d, and 55 are input to the EVECU 31.

The first load current sensor 53a and the first load voltage sensor 54a may be provided outside the DCDC converter 41 or may be built in the DCDC converter 41. The same applies to the other load current sensors 53b to 53d and the load voltage sensors 54b to 54d.

The EVECU 31 constitutes the inverter 21 and controls the switching of the lower arm switch. Specifically, the EVEC 31 is a switching control that converts the DC power output from the storage battery 22 into AC power and supplies it to the stator winding of the rotary electric machine 20 in order to rotate the rotor of the rotary electric machine 20 for traveling of the vehicle 10. Performs a certain power driving control. Further, the EVECU 31 is a switching control that converts the AC power regenerated by the rotary electric machine 20 into DC power and outputs it to the storage battery 22 side in order to charge the storage battery 22 or supply power to the DCDC converter 41 or the like. Performs a certain regenerative drive control.

Subsequently, with reference to FIG. 2, the procedure of the process executed by the EVE C31 is shown. This process is repeatedly executed, for example, at a predetermined control cycle.

In step S10, the charging power limit value Win and the SOC of the storage battery 22 are acquired from the battery ECU 30.

In step S11, it is determined whether or not the acquired SOC is equal to or higher than the charge threshold value Sα (for example, 95%). The process of step S11 is a process for determining whether or not the storage battery 22 is in a fully charged state. In this embodiment, the process of step S11 corresponds to the "charge state determination unit".

If a negative determination is made in step S11, it is determined that the battery is not fully charged, and the process proceeds to step S12. In step S12, the regenerative power limit value Plim is calculated. Hereinafter, this calculation method will be described.

In step S12, the total power consumption We, which is the total value of the power consumption of each of the DCDC converter 41, the electric compressor 42, the auxiliary inverter 43, and the heater 44, is calculated. Here, the power consumption of the DCDC converter 41 is calculated as a product of the current I1 detected by the first load current sensor 53a and the voltage V1 detected by the first load voltage sensor 54a, and the power consumption of the electric compressor 42 is calculated. , Calculated as a product of the current I2 detected by the second load current sensor 53b and the voltage V2 detected by the second load voltage sensor 54b. Further, the power consumption of the auxiliary inverter 43 is calculated as a product of the current I3 detected by the third load current sensor 53c and the voltage V3 detected by the third load voltage sensor 54c, and the power consumption of the heater 44 is calculated. It is calculated as a multiplication value of the current I4 detected by the fourth load current sensor 53d and the voltage V4 detected by the fourth load voltage sensor 54d.

Further, in step S12, the power loss Wmsys generated by the inverter 21 and the rotary electric machine 20 is calculated. In the present embodiment, the lost power Wmsys is calculated by subtracting the regenerative power Piv output from the inverter 21 from the rotational power of the rotary electric machine 20. Here, the rotational power is calculated using the torque of the rotary electric machine 20 calculated based on the detection value of the phase current sensor 50 and the rotation speed of the rotor calculated based on the detection value of the rotation angle sensor 55. Just do it. Further, the regenerative power Piv output from the inverter 21 may be calculated as a product of the current Idc detected by the power supply current sensor 51 and the voltage Vdc detected by the power supply voltage sensor 52.

Each sensor used for calculating the total power consumption We and the lost power Wmsys is usually used for controlling the DCDC converter 41, the inverter 21, and the like. Therefore, for example, the total power consumption We and the lost power Wmsys can be calculated without providing a new sensor for calculating the total power consumption We and the lost power Wmsys.

Then, in step S12, the regenerative power limit value Plim is calculated by adding the charging power limit value Win acquired in step S10, the calculated loss power Wmsys, and the calculated total power consumption We. By using the regenerative power limit value Plim calculated in this way, the regenerative drive control can be performed in consideration of the power consumption of each electric load of the DCDC converter 41 and the like and the power loss generated by the inverter 21 and the like. Therefore, the storage battery 22 can be efficiently charged by the regenerative power.

In the following step S13, switching control of the inverter 21 is performed based on the regenerative power limit value Plim calculated in step S12. Specifically, switching control is performed so that the regenerative power Piv output from the inverter 21 is equal to or less than the regenerative power limit value Plim calculated in step S12. More specifically, when the regenerative power for realizing the braking force to be applied to the drive wheels 11 by the regenerative drive control (hereinafter referred to as the required regenerative power) exceeds the regenerative power limit value Plim, the regenerative power output from the inverter 21 is regenerated. Switching control is performed so that the power Piv becomes the regenerative power limit value Plim calculated in step S12. On the other hand, when the required regenerative power is less than the regenerative power limit value Plim, switching control is performed so that the regenerative power Piv output from the inverter 21 becomes the required regenerative power. In this embodiment, the process of step S13 corresponds to the "control unit".

On the other hand, if an affirmative determination is made in step S11, it is determined that the battery is fully charged, and the process proceeds to step S14. In step S14, the regenerative power limit value Plim is set to the same value as the charging power limit value Win acquired in step S10. That is, the regenerative power limit value Plim is set without using the lost power Wmsys and the total power consumption We.

Then, in step S13, switching control of the inverter 21 is performed based on the regenerative power limit value Plim calculated in step S14. Specifically, the switching control of the inverter 21 is performed so that the regenerative power Piv output from the inverter 21 is equal to or less than the regenerative power limit value Plim calculated in step S14. More specifically, when the required regenerative power exceeds the regenerative power limit value Plim, switching control is performed so that the regenerative power Piv output from the inverter 21 becomes the regenerative power limit value Plim calculated in step S14. On the other hand, when the required regenerative power is less than the regenerative power limit value Plim, switching control is performed so that the regenerative power Piv output from the inverter 21 becomes the required regenerative power.

In the above description, when the affirmative determination is made in step S11, the calculation process of the lost power Wmsys and the calculation process of the total power consumption We are not performed, but the present invention is not limited to this. For example, before the start of the process in step S11, the lost power Wmsys and the total power consumption We are calculated by the method described above. Then, if an affirmative determination is made in step S11, the process proceeds to step S14, and the regenerative power limit value Plim is set to the same value as the acquired charge power limit value Win without using the calculated loss power Wmsys and total power consumption We. May be good.

Incidentally, in the present embodiment, the processes of steps S12 and S14 correspond to the "setting unit", the "load power calculation unit", and the "loss power calculation unit".

As described above, in the present embodiment, when the EVECU 31 determines that the storage battery 22 is in a fully charged state, only the charging power limit value Win is out of the lost power Wmsys, the total power consumption We, and the charging power limit value Win. Is used to set the regenerative power limit value Plim to the same value as the charging power limit value Win. Therefore, it is possible to reduce the influence of the detection errors of the load current sensors 53a to 53d, the load voltage sensors 54a to 54d, and the rotation angle sensor 55 on the setting of the regenerative power limit value Plim. As a result, it is possible to prevent the actual charging power of the storage battery 22 from exceeding the charging power limit value Win or the storage battery 22 from being overcharged.

<Other Embodiments>
The above embodiment may be modified as follows.

The power consumption of the DCDC converter 41, the electric compressor 42, the auxiliary inverter 43, and the heater 44 may be calculated by the controller included in the DCDC converter 41, the electric compressor 42, the auxiliary inverter 43, and the heater 44. In this case, the calculated power consumption is transmitted from the controllers of the DCDC converter 41, the electric compressor 42, the auxiliary inverter 43, and the heater 44 to the ECU 31, and the ECU 31 calculates the total power consumption We using each received power consumption. do it.

-In the calculation of the lost power Wmsys, for example, the rated voltage of the storage battery 22 may be used instead of the detected value of the power supply voltage sensor 52.

Further, in calculating the power consumption of the DCDC converter 41, the electric compressor 42, the auxiliary inverter 43, and the heater 44, for example, the rated voltage of the storage battery 22 may be used instead of the detected values of the load voltage sensors 54a to 54d. Good.

In the process of step S12, the EV ECU 31 may set the added value of the charging power limit value Win and the lost power Wmsys to the regenerative power limit value Plim without using the total power consumption We. Further, in the process of step S12, the EVACU 31 may set the added value of the charging power limit value Win and the total power consumption We to the regenerative power limit value Plim without using the lost power Wmsys.

-The process of step S14 can be changed as follows (1) and (2), for example.

(1) The EVEC 31 may set the regenerative power limit value Plim to a value obtained by adding a predetermined margin to the charging power limit value Win. The regenerative power limit value Plim set in this case is also smaller than the regenerative power limit value Plim set in step S12. Further, the margin may include, for example, the power loss generated by the wiring resistance between the storage battery 22, the DCDC converter 41, the electric compressor 42, the auxiliary inverter 43, and the heater 44.

(2) The EVEC 31 calculates the regenerative power limit value Plim in the same manner as in step S12, and subtracts the predetermined power from the calculated regenerative power limit value Plim to obtain the final regenerative power limit value Plim used in step S13. It may be set.

-A configuration in which load current sensors 53a to 53d and load voltage sensors 54a to 54d are individually provided for the DCDC converter 41, the electric compressor 42, the auxiliary inverter 43, and the heater 44 (hereinafter, also referred to as electric loads 41 to 44). Instead, as shown in FIG. 3, a common load current sensor 57 and a common load voltage sensor 58 may be provided for each of the electric loads 41 to 44. The load current sensor 57 and the load voltage sensor 58 are provided on the inlet side of each of the electric loads 41 to 44. In this case, the current Ia detected by the load current sensor 57 is the total value of the currents flowing through the electric loads 41 to 44. In step S12 of FIG. 2, the total power consumption We may be calculated as a multiplication value of the current Ia detected by the load current sensor 57 and the voltage Va detected by the load voltage sensor 58.

Incidentally, for the calculation of the total power consumption We, the rated voltage of the storage battery 22, the detected value Vdc of the power supply voltage sensor 52, the detected value Va of the load voltage sensor 58 of FIG. 3, or the detected values of the load voltage sensors 54a to 54d of FIG. There are four methods using V1 to V4. Further, there are two methods for calculating the total power consumption We, using the detection values I1 to I4 of the load current sensors 53a to 53d of FIG. 1 or the detection values Ia of the load current sensor 57 of FIG. In the calculation of the total power consumption We, each of the four methods for voltage and each of the two methods for current can be any combination.

-In step S12, the detection value of the current sensor may not be used for calculating the total power consumption We. Hereinafter, a case where the electric compressor 42 and the DCDC converter 41 are used as the electric load will be described as an example.

First, the electric compressor 42 will be described. The vehicle 10 includes a pressure sensor that detects the pressure of the refrigerant that circulates in the refrigeration cycle of the air conditioner, and a rotation speed sensor for air conditioning that detects the rotation speed of the electric compressor 42. Specifically, for example, the pressure sensor detects the refrigerant pressure on the refrigerant discharge side of the electric compressor 42 in the refrigeration cycle. In step S12, the EVACU 31 has map information or mathematical information in which the detected values of the pressure sensor and the rotation speed sensor for air conditioning, the refrigerant pressure, and the rotation speed of the electric compressor 42 are defined and the power consumption of the electric compressor 42 is defined. The power consumption of the electric compressor 42 is calculated based on the above.

Subsequently, the DCDC converter 41 will be described. The power consumption of the DCDC converter 41 can be grasped from, for example, the power consumption of a low-voltage electric load. Hereinafter, a case where the low-voltage electric load includes a blower fan and a water pump will be described. The vehicle 10 includes a blower rotation speed sensor that detects the rotation speed of the blower fan, a pump rotation speed sensor that detects the rotation speed of the water pump, and a flow rate sensor that detects the circulating flow rate of the cooling water discharged from the water pump. I have. In step S12, the ECECU 31 calculates the power consumption of the blower fan based on the map information or mathematical formula information in which the power consumption of the blower fan is defined in relation to the detection value of the blower fan and the rotation speed of the blower fan. .. Further, the EVECU 31 is based on the map information or mathematical information in which the power consumption of the water pump is defined in relation to the detection values of the pump rotation speed sensor and the flow rate sensor, the rotation speed of the water pump and the circulation flow rate of the cooling water. Then, the power consumption of the water pump is calculated. Then, the EVEC 31 grasps the calculated power consumption of the blower fan and the water pump as the power consumption of the low-voltage electric load, and adds the power consumption of the grasped low-voltage electric load or the loss generated by the DCDC converter 41 to the power consumption. The value is calculated as the power consumption of the DCDC converter 41.

In this way, even when the detection value of the sensor that detects physical quantities other than the electrical physical quantity such as rotation speed, pressure, and flow rate is used without using the detection value of the sensor that detects the electrical physical quantity. The above-mentioned problem may occur in which the detection error of the sensor or the like affects the setting of the regenerative power limit value Plim. In addition, map information or mathematical formula information is information defined in a steady state in which physical quantities and power consumption are stable. Therefore, in the transient state where the physical quantity changes, the deviation between the power consumption calculated based on the map information or the mathematical formula information and the actual power consumption becomes large, and the magnitude of this deviation is used to set the regenerative power limit value Plim. Can have an impact. Therefore, even when the detection value of the sensor that detects a physical quantity other than the electrical physical quantity is used, the processes of steps S11 and S12 are effective.

Incidentally, the lost power Wmsys can also be calculated without using the detection value of the sensor that detects the electrical physical quantity. The EVECU 31 does not use the detection value of the phase current sensor 50, for example, the rotation speed of the rotor calculated based on the command torque of the rotary electric machine 20 and the detection value of the rotation angle sensor 55, and the torque and rotor of the rotary electric machine 20. The loss power Wmsys may be calculated based on the map information or the mathematical information in which the loss power Wmsys is defined in relation to the rotation speed of the above. Further, for example, the EVEC 31 loses in relation to the detection value of the wheel speed sensor that detects the rotational speed of the wheels constituting the vehicle 10, the command driving force of the vehicle 10, the rotational speed of the wheels, and the driving force of the vehicle 10. The loss power Wmsys may be calculated based on the map information or the mathematical formula information in which the power Wmsys is defined. Here, the command driving force may be calculated based on, for example, the amount of operation of the accelerator operating member (for example, the accelerator pedal) operated by the user.

The electric load provided on the vehicle 10 is not limited to four, that is, a DCDC converter 41, an electric compressor 42, an auxiliary inverter 43, and a heater 44, and for example, a part of them and at least one of them may be used. Good. The electric load is not limited to the DCDC converter 41, the electric compressor 42, the auxiliary inverter 43, and the heater 44, and may be another electric load.

-The inverter 21 and the storage battery 22 may be electrically connected via a DCDC converter. The DCDC converter boosts the output voltage of the storage battery 22 and supplies it to the inverter 21, or steps down the voltage from the inverter 21 and supplies it to the storage battery 22.

-The power storage device is not limited to a storage battery, and may be, for example, a large-capacity capacitor.

-The vehicle equipped with the control device is not limited to a vehicle having only a rotary electric machine as a traveling power source, and may be a vehicle equipped with an internal combustion engine in addition to the rotating electric machine as a traveling power source. Even in this case, it is possible to obtain an effect similar to the effect obtained in the above embodiment.

The controls and methods thereof described in the present disclosure are provided by a dedicated computer provided by configuring a processor and memory programmed to perform one or more functions embodied by a computer program. It may be realized. Alternatively, the controls and methods thereof described in the present disclosure may be implemented by a dedicated computer provided by configuring the processor with one or more dedicated hardware logic circuits. Alternatively, the control unit and method thereof described in the present disclosure may be a combination of a processor and memory programmed to perform one or more functions and a processor composed of one or more hardware logic circuits. It may be realized by one or more dedicated computers configured. Further, the computer program may be stored in a computer-readable non-transitional tangible recording medium as an instruction executed by the computer.

10 ... vehicle, 20 ... rotary electric machine, 21 ... inverter, 22 ... storage battery, 31 ... EVECU, 41 ... DCDC converter, 42 ... electric compressor.

Claims (7)

Power storage device (22) and
An inverter (21) electrically connected to the power storage device and
A rotary electric machine (20) electrically connected to the inverter and
In a vehicle control device (31) applied to a vehicle (10) including an electric load (41 to 44) electrically connected to the power storage device.
The regenerative power limit value (Plim) of the inverter when the regenerative power generation of the rotary electric machine is performed by using the energy input from the drive wheel (11) to the rotary electric machine is set as the charging power limit value of the power storage device. Setting part to set based on (Win) and
A control unit that controls the inverter so that the regenerative power (Piv) output from the inverter is equal to or less than the regenerative power limit value.
A charging state determining unit for determining whether or not the power storage device is in a fully charged state is provided.
The setting unit is a vehicle control device that sets the regenerative power limit value smaller when the power storage device is determined to be in the fully charged state than when it is determined that the power storage device is not in the fully charged state. A load power calculation unit for calculating the power consumption (We) of the electric load is provided.
The setting unit
When it is determined that the power storage device is not in the fully charged state, the regenerative power having a value larger than the charging power limit value is based on the power consumption calculated by the load power calculation unit and the charging power limit value. Set limits and
When it is determined that the power storage device is in a fully charged state, the regenerative power limit value is set based only on the charge power limit value among the power consumption of the electric load and the charge power limit value. The vehicle control device according to claim 1. The vehicle includes load current sensors (53a to 53d, 57) that detect the current supplied to the electrical load.
The vehicle control device according to claim 2, wherein the load power calculation unit calculates the power consumption of the electric load based on the detected value of the load current sensor. A power loss calculation unit for calculating the power loss (Wms) generated by the inverter and the rotary electric machine is provided.
The setting unit
When it is determined that the power storage device is not in the fully charged state, the regenerative power having a value larger than the charging power limit value is based on the lost power calculated by the lost power calculation unit and the charging power limit value. Set limits and
When it is determined that the power storage device is in a fully charged state, the regenerative power is based only on the charge power limit value among the loss power generated by the inverter and the rotary electric machine and the charge power limit value. The vehicle control device according to claim 1, wherein a limit value is set. The vehicle includes a power supply current sensor (51) that detects a current flowing through the inverter.
The vehicle control device according to claim 4, wherein the power loss calculation unit calculates the power loss generated by the inverter and the rotary electric machine based on the detected value of the power supply current sensor. A load power calculation unit that calculates the power consumption (We) of the electric load, and
A power loss calculation unit for calculating the power loss (Wms) generated by the inverter and the rotary electric machine is provided.
The setting unit
When it is determined that the power storage device is not in the fully charged state, the charging is performed based on the power consumption calculated by the load power calculation unit, the power loss calculated by the power loss calculation unit, and the charge power limit value. Set the regenerative power limit value that is larger than the power limit value,
When it is determined that the power storage device is in a fully charged state, only the charging power limit value is applied among the power consumption of the electric load, the power loss generated by the inverter and the regenerative electric machine, and the charging power limit value. The vehicle control device according to claim 1, wherein the regenerative power limit value is set based on the above. The vehicle includes a load current sensor (53a to 53d, 57) for detecting the current supplied to the electric load, and a power supply current sensor (51) for detecting the current flowing through the inverter.
The load power calculation unit calculates the power consumption of the electric load based on the detected value of the load current sensor.
The vehicle control device according to claim 6, wherein the power loss calculation unit calculates the power loss generated by the inverter and the rotary electric machine based on the detected value of the power supply current sensor.

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