JP2002058113A - Power-outputting apparatus and its control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cause a battery to fully exhibit its performance, and to reduce the size of an apparatus. SOLUTION: An output requirement BP* for the battery is computed (S110) on the basis of the operation point of an engine and the output (torque command) of a motor set with respect to a request output to the drive shaft. The output (torque command) of the motor is corrected (S118, S120), so that the output requirement BP* does not become larger than the instantaneous output Pmax set, on the basis of a battery SOC and a battery temperature T, when the output requirement BP* is larger than the rated output of a battery. The operation of the motor is controlled (S122), on the basis of the set or corrected torque command, along with controlling the operation of the engine by the operation point set being restricted to an outputtable time Δt. As a result of this, the battery can fully to exhibit its performance level. And reduce the size of the battery, as well as the apparatus, as compared to one whose output is restricted to the rated output.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power output device and a control method thereof, and more particularly, to a power output device including at least one electric device driven by charging and discharging a battery and a control method thereof.

[0002]

2. Description of the Related Art Conventionally, as a power output device of this type,
There has been proposed one that limits the current command value of the electric motor when the output current of the battery exceeds a predetermined value (for example, Japanese Patent Application Laid-Open No. 9-9411). In this device,
When the output current of the battery exceeds a predetermined value, a limiting coefficient is calculated from the output current value, the calculated limiting coefficient is multiplied by the current command value of the motor to correct the current command value, and the corrected current command value is calculated. The electric device is used to drive the electric device to limit the output from the battery, thereby preventing permanent deterioration due to excess output of the battery.

[0003]

However, in such a power output device, it is necessary to increase the capacity of the battery in order to respond to the output of the electric motor instantaneously, and the battery becomes larger. If the device equipped with the power output device has small fluctuations in the required output to the power output device,
The output of the electric motor also has a small fluctuation, and the capacity of the battery is in accordance with the fluctuation. In such devices, the output of the motor changes frequently, and a large but instantaneous output may be required. In order to allow the instantaneous large output, the capacity of the battery must be increased. Increasing the capacity of the battery leads to an increase in the size of the battery itself, which in turn leads to an increase in the size of the device.

[0004] It is an object of the power output apparatus and the control method thereof of the present invention to exert sufficient battery performance. Another object of the present invention is to reduce the size of the power output device and the control method thereof.

[0005]

Means for Solving the Problems and Actions and Effects Thereof The power output apparatus and the control method thereof according to the present invention employ the following means in order to at least partially achieve the above object.

A power output device according to the present invention is a power output device including at least one electric device driven by charging / discharging a battery, and based on an output required of the power output device. A target output calculating means for calculating a target output; a battery output estimating means for estimating an output of the battery; and a battery output estimating means for outputting the target output calculated by the target output calculating means from the electric device to the battery. Over-rated drive control means for driving and controlling the electric device so that the target output is output from the electric device within a predetermined time when the output of the electric device is estimated to exceed the steady-state rated output of the battery. The point is to prepare.

In the power output apparatus of the present invention, the over-rated drive control means outputs the target output calculated by the target output calculation means from the electric device by the battery output estimating means so that the output of the battery becomes the steady rated output of the battery. When it is estimated to exceed, the electric device is driven and controlled such that the target output is output from the electric device within a predetermined time range. As a result, the electric device can be driven with a desired output. At this time, if the predetermined time is set within a range in which the battery does not permanently deteriorate, the performance of the battery can be exhibited without causing the battery to deteriorate. Here, “output” includes both a positive output and a negative output.

In the power output device of the present invention,
The over-rated drive control means, when the battery output estimating means outputs the target output calculated by the target output calculating means from the electric device, when the output of the battery is estimated to exceed the instantaneous rated output of the battery. ,
The target output is a means for correcting the output of the battery to be equal to or less than the instantaneous rated output of the battery, and controlling driving of the electric device so that the corrected target output is output from the electric device. Can also. This way,
Since the output of the battery exceeds the steady-state rated output but falls below the instantaneous rated output, its performance can be sufficiently exhibited without deterioration of the battery.

Further, in the power output device of the present invention, a battery state detecting means for detecting a state of the battery,
Time setting means for setting the predetermined time based on the detected state of the battery may be provided. With this configuration, since the predetermined time is set according to the state of the battery, the time of the output exceeding the steady rated output of the battery can be set more appropriately. As a result,
The performance can be more sufficiently exhibited without deteriorating the battery. In the power output device according to the aspect of the present invention, the battery state detecting means may be a means for detecting a state of charge of the battery and / or a temperature of the battery as the state of the battery.

A method for controlling a power output device according to the present invention is a method for controlling a power output device including at least one electric device that is driven by charging and discharging a battery. (B) estimating the output from the battery, and (c) calculating the output of the battery when outputting the calculated target output from the electric device. The gist of the present invention is to drive and control the electric device such that the target output is output from the electric device within a predetermined time when it is estimated that the rated output of the battery is exceeded.

According to the control method of the power output apparatus of the present invention, the electric device can be driven at a desired output by operating the battery within the predetermined time range but exceeding the steady-state rated output. it can. If the predetermined time is set within a range that does not cause permanent deterioration of the battery, for example, if the predetermined time is set according to the state of the battery, the performance of the battery can be maintained without deterioration of the battery. Can be demonstrated. Here, “output” includes both a positive output and a negative output.

In the control method for a power output device according to the present invention, the step (c) includes the step of: outputting the target output calculated by the target output calculating means from the electric device to the output of the battery. When it is estimated that the output exceeds the instantaneous rated output, the electric device corrects the target output so that the output of the battery becomes equal to or less than the instantaneous rated output of the battery, and outputs the corrected target output from the electric device. May be a step of driving-controlling. In this case, the output of the battery exceeds the steady-state rated output but becomes equal to or less than the instantaneous rated output. Therefore, the battery can sufficiently exhibit its performance without deterioration.

[0013]

Next, embodiments of the present invention will be described with reference to examples. FIG. 1 is a configuration diagram schematically showing the configuration of a vehicle 10 equipped with a power output device 20 according to one embodiment of the present invention. The power output device 20 of the embodiment is attached to an engine 22 which is an internal combustion engine using gasoline as a fuel and an engine output shaft 28 connected to a crankshaft 24 of the engine 22 via a flywheel damper 26, as shown in the figure. A motor MG1 including an inner rotor 32 provided and an outer rotor 34 rotatable relative to the inner rotor 32;
2, the drive shaft 90 connected to the outer rotor 34 is connected to the rotor 42 connected to the engine output shaft 28.
And a stator 44, a motor MG2, a chargeable / dischargeable battery 50, an inverter 38 for exchanging electric power between the battery 50 and the motor MG1, and an electric exchange between the battery 50 and the motor MG2. And an engine electronic control unit (hereinafter referred to as an engine ECU) for controlling the operation of the engine 22.
60), a motor electronic control unit (hereinafter, referred to as a motor ECU) 62 for controlling the driving of the motors MG1, MG2, a battery electronic control unit (hereinafter, referred to as a battery ECU) 64 for controlling the battery 50, and a power output. Hybrid vehicle electronic control unit (hereinafter referred to as HVECU) 70 that controls the entire device 20
And

The motor MG1 is configured as a PM synchronous motor generator except that the outer rotor 34 is rotatably supported. That is, the inner rotor 32
Are four permanent magnets 3 magnetized radially on the outer peripheral surface.
The outer rotor 34 is formed by punching a non-oriented electromagnetic steel sheet and winding a three-phase coil 35 around a slot of a stator formed by laminating a plurality of layers. I have. Therefore, if it is considered that the inner rotor 32 is rotating relative to the outer rotor 34, the motor MG1 can be regarded as having the same configuration as a normal synchronous motor generator. Three-phase coil 3
Reference numeral 5 is connected to an inverter 38 via a rotating brush 36, and the motor MG1 operates as a motor or a generator by powering control or regenerative control by the inverter 38.

The motor MG2 includes a rotor 42 having four permanent magnets 43 magnetized in the radial direction on the outer peripheral surface of the rotor MG alternately attached to the magnetic poles, and a stator 44 having a three-phase coil 45 wound around a slot. It is configured as a normal PM-type synchronous motor generator provided. The three-phase coil 45 is connected to the inverter 48, and the motor MG2 operates as a motor or a generator by powering control or regenerative control by the inverter 48.

The inverter 38 and the inverter 48 are each configured as a normal inverter circuit including six switching elements, and are connected so as to share a positive bus and a negative bus. A positive terminal and a negative terminal of the battery 50 are connected to the shared positive bus and negative bus, and the inverter 38 and the inverter 4 are connected to each other.
8, the battery 50 and the motor MG1 or the motor MG2
And power can be exchanged. That is, the motor MG1 or the motor MG2 is powered by using the electric power of the battery 50, or conversely, the electric power obtained by the regenerative control of the motor MG1 or the motor MG2 is used.
Can be charged. Also, the motor MG1
When the power running control is performed on one of the motor MG2 and the other, the power obtained by the regenerative control is insufficient for the power running control. Conversely, when the electric power obtained by the regenerative control exceeds the electric power necessary for the power running control, the surplus electric power may be used to charge the battery 50. In addition, it is also possible to perform control so that the power required for the power running control is just covered by using the power obtained by the regenerative control. In this case, it is necessary to control the output from the engine 22.

The engine ECU 60 is a unit that controls an intake air amount, a fuel injection amount, and the like to the engine 22 so that the engine 22 is operated at the set operation point when the operation point of the engine 22 is set. More specifically, it is configured as a microprocessor centered on a CPU. The engine ECU 60 includes the HVECU 7
0 via the communication port.
The operating point of the engine 22 set by 0 is input. Further, detection signals from various sensors for detecting the operating state of the engine 22 are input to the engine ECU 60, and the engine ECU 60 detects the engine 2 based on the input various detection signals and the set operation points.
2 can be controlled. It should be noted that illustration and description of the detailed configuration of the engine 22 and input / output signals of the engine ECU 60 and detailed description of control of the engine 22 based on the input / output signals are omitted since they do not form the core of the present invention. .

The motor ECU 62 includes motors MG1 and MG
2 is a unit that outputs a switching control signal to inverters 38 and 48 so that the set output is output from motors MG1 and MG2 when the output (torque command value) from controller 2 is set. As a microprocessor. Motor ECU
The motor MG 62 communicates with the HVECU 70 via a communication port.
1 and the output of MG2 (torque command value). An input port (not shown) of the motor ECU 62 is connected to the engine output shaft 28 from the resolver 66 attached to the engine output shaft 28, that is, the motor MG1.
Of the inner rotor 32 and the drive shaft 90 from the resolver 67 attached to the drive shaft 90, that is, the motor MG
1, the number of rotations of the outer rotor 34, the number of rotations of the rotor 42 of the motor MG2 from the resolver 68 attached to the rotating shaft 41 to which the rotor 42 of the motor MG2 is attached,
The phase current flowing through the three-phase coil 35 from a current sensor (not shown) mounted in the inverter 38,
8, a phase current flowing through a three-phase coil 45 from a current sensor (not shown) mounted in the motor 8 is input, and the switching of the inverters 38 and 48 is performed based on these signals and the set outputs of the motors MG1 and MG2. Element switching control, that is, drive control of the motor MG1 and the motor MG2 can be performed.

The battery ECU 64 is a unit for managing the state of the battery 50, and is specifically configured as a microprocessor mainly including a CPU. The battery ECU 64 communicates with the HVECU 70 via a communication port, and changes the state of the battery 50 to the HVECU 7.
0 is input. Also, battery ECU
The input port 64 (not shown) includes a current from the current sensor 52 attached to the power line of the battery 50 and a voltage sensor 5 attached between the output terminals of the battery 50.
4, the battery temperature T from the temperature sensor 56 attached to the battery 50, and the like are input, and the input current is integrated to calculate and calculate the battery SOC as the remaining charge. The battery SOC, the temperature T, the voltage between terminals, and the like are output to the HVECU 70.

The HVECU 70 responds to the output request to the drive shaft 90 by operating points of the engine 22 and the motor MG1.
And a unit for setting a torque command value of the motor MG2 and outputting a command to each of the electronic control units 60, 62, and 64. Like other electronic control units, the unit is configured as a microprocessor centered on a CPU. HVE
Input ports (not shown) of the CU 70 include an accelerator position AP from an accelerator pedal position sensor 73 that detects the position of an accelerator pedal 72, a brake position BP from a brake pedal position sensor 75 that detects the position of a brake pedal 74, and a shift lever 76. , The shift position SP from the shift lever position sensor 77, the switch signal from the ignition switch 78, and the like.

Next, the operation of the power output apparatus 20 of the embodiment configured as described above, particularly, the operation when an output exceeding the rated output of the battery 50 is requested will be described. FIG.
5 is a flowchart illustrating an example of an output control routine executed by the HVECU 70 of the power output apparatus 20 according to the embodiment. This routine is repeatedly executed at predetermined time intervals.

When the output control routine is executed, HVE
First, the CPU of the CU 70 starts with the accelerator position AP detected by the accelerator pedal position sensor 73 and the battery S obtained by communication from the battery ECU 64.
A process of reading the OC, the battery temperature T, the rotation speed Nd of the drive shaft 90 obtained by communication from the motor ECU 62, and the like is executed (step S100). In the output control routine of FIG. 2, in order to explain the operation when an output exceeding the rated output of the battery 50 is requested, other signals to be read, for example, the brake position BP detected by the brake pedal position sensor 75 and the shift Shift position S detected by lever position sensor 77
Although illustrations of the engagement states of the clutch P and the clutches C1 and C2 and the like are omitted, these signals are appropriately read in the normal output control.

When the various signals are read, first, a required output to the drive shaft 90 is calculated (step S102). The required output to the drive shaft 90 is calculated based on the accelerator position AP as the amount of depression of the accelerator pedal 72, the rotation speed Nd of the drive shaft 90, or is derived from a map or the like. Note that the required output to the drive shaft 90 also includes a negative output, that is, a braking output. In this case, the brake position B as the amount of depression of the brake pedal 74 is determined.
It is calculated based on P, the rotation speed Nd of the drive shaft 90, and the like.

When the required output to the drive shaft 90 is calculated,
The required output, the rotational speed Nd of the drive shaft 90, the battery SO
C or the like to set the operation mode (step S10
4). In the operation mode, when the clutch C1 is engaged, the clutch C2 is disengaged, the rotor 42 of the motor MG2 is connected to the drive shaft 90, and the engine MG2 and the motor MG1 are stopped. The motor 22 is operated so that the power corresponding to the output request to the drive shaft 90 is output, and the power from the engine 22 is torque-converted by the motors MG1 and MG2 to the drive shaft 90. A torque conversion drive mode in which a required output is output, in which the engine 22 is operated so that power exceeding the output request to the drive shaft 90 is output, and torque from the engine 22 is converted by the motor MG1 and the motor MG2 to drive the drive shaft. A charging drive mode for outputting a required output to the battery 90 and charging the battery 50 with surplus power. The engine 22 is operated so that power less than the output request to the shaft 90 is output, and the required output is output to the drive shaft 90 by the motor MG1 and the motor MG2 using the power from the engine 22 and the electric power from the battery 50. In addition to the driving mode related to driving such as the discharge driving mode, there is also a braking mode in which a braking force is output to the drive shaft 90. In these driving modes, the torque conversion driving mode, the charging driving mode, and the discharging driving mode include a mode in which the clutch C1 is engaged and the clutch C2 is disengaged, and a mode in which the clutch C1 is disengaged and the clutch C2 is not engaged.
There are two types of modes, each of which is in the engaged state. Details of the control of which of these operation modes is set are omitted because they do not form the core of the present invention.

When the operation mode is set in this way, the operation point of the engine 22 and the outputs (torque command values) of the motors MG1 and MG2 are set based on the set operation mode (steps S106 and S108). Then, the engine 22 is operated at the set operation point and the motors MG1 and MG2 are driven by the set torque command value.
Is calculated (step S110). The output request BP * is the motor M
The power from the engine 22 is subtracted from the sum of the power from the motor MG1 and the power from the motor MG2 by converting the power from the power from the motor MG1 and the power from the motor MG2 into a positive value, and the power is converted into power. It is calculated as the sum of the power required for driving and the like. Note that the above-mentioned operation modes are the torque conversion drive mode, the charge drive mode,
For example, in the braking mode, the output request BP * has a negative value.

When the output request BP * of the battery 50 is calculated, the calculated output request BP * is compared with the rated output of the battery 50 (step S112). When the calculated output request BP * is lower than the rated output of battery 50, engine ECU 60 and motor ECU 62 are set so that engine 22 is operated at the set operation point and motors MG1 and MG2 are driven at the set torque command values. The operation point and the torque command value are output (step S11
4), end this routine. As described above, the engine ECU 60 and the motor ECU 62 that have received the set operation point and the torque command value operate the engine 22 at the set operation point, and operate the inverters 38 and 48 based on the set torque command value. The switching of the switching element is controlled.

On the other hand, when the calculated output request BP * exceeds the rated output of the battery 50, the instantaneous output Pmax as the maximum output that can be instantaneously output from the battery 50 based on the battery SOC and the battery temperature T and the output thereof are obtained. The output possible time Δt as a possible time is set (step S116). FIG. 3 shows an example of the relationship between the battery SOC and the battery maximum output (positive output). Generally, the maximum battery output becomes larger as the battery SOC becomes larger. FIG. 4 shows the relationship in FIG. 3 as the relationship between the battery maximum output (positive output) and the discharge time of the battery 50. The range in which the maximum output of the battery 50 does not fall below the discharge time is the continuous use area of the battery 50, and the output as the threshold value is determined as the rated output of the battery 50. FIG. 5 shows an example of the relationship between the battery temperature T and the maximum output (positive output) of the battery 50. As shown, the maximum output of the battery 50 decreases when the battery temperature T is low or high. In the process of step S116, based on the battery SOC and the battery temperature T, the instantaneous output Pmax is set within a range not exceeding the maximum output of the battery 50, and the possible output time Δt is set. When the output request BP * is a negative value, the relationship shown in FIG. 3, FIG. 4, and FIG. 5 is changed to the relationship between the battery SOC and the battery maximum output (negative output), The instantaneous output Pmax is set based on the relationship between the charging time of the battery 50 and the relationship between the battery temperature T and the maximum output (positive output) of the battery 50, and the possible output time Δt is set.

When the instantaneous output Pmax and the possible output time Δt are set, the output request BP * is limited to be equal to or less than the instantaneous output Pmax (steps S118 and S120). That is, when the output request BP * is larger than the instantaneous output Pmax, the outputs (torque command values) of the motors MG1 and MG2 are corrected so that the output request BP * becomes the instantaneous output Pmax. Then, the engine 22 is operated at the operation point set only for the possible output time Δt, and the operation points and the torque command set in the engine ECU 60 and the motor ECU 62 so that the motors MG1 and MG2 are driven with the set or corrected torque command values. The value is output (step S122), and this routine ends.

FIG. 6 shows an example of the driving pattern of a vehicle equipped with the power output device 20 of the embodiment and the state of each device of the power output device 20. In this example, the battery 50 is operated at an output larger than the rated output at the time T1 and the time T2. However, the operation time depends on each battery 50
.Times.t1 and .DELTA.t2 shorter than the possible output time .DELTA.t set based on the state of. In this FIG.
Although the case where the positive output of the battery exceeds the rated output has been described, the same applies to the case where the negative output of the battery exceeds the rated output.

According to the power output device 20 of the embodiment described above, the output request BP * of the battery 50
, The output is allowed only for the possible output time Δt set based on the battery SOC and the battery temperature T.
1, MG2 can be brought into a desired operating state. In addition, since the output request BP * is limited so as not to exceed the instantaneous maximum output of the battery 50, the battery 50 is not permanently deteriorated. Therefore, the performance of the battery 50 can be further exhibited. As a result, it is possible to suppress an increase in the capacity of the battery, and hence an increase in the size of the device.

In the power output device 20 of the embodiment, when the output request BP * exceeds the rated output, the output is limited by the instantaneous output Pmax set based on the battery SOC and the battery temperature T and the output possible time Δt. However, the output may be limited by a predetermined instantaneous output and an outputable time.

In the embodiment, the operation when the battery output request BP * exceeds the rated output is used as a power source for the engine 22.
The present invention is applied to the power output device 20 including the motor MG1 and the motor MG1 and the motor MG2. However, the power output device may have any configuration as long as the power output device includes at least one electric device that is driven with charging and discharging of a battery. You may.
For example, a power output device that includes an engine, a power distribution mechanism that distributes power from the engine at a predetermined torque ratio, and two motor generators and that can convert the power output from the engine into torque and output the torque to a drive shaft; A power output device including an engine, a generator for charging a battery using power from the engine, and a motor for outputting power to a drive shaft using power from the battery; The present invention can be applied to various power output devices such as a power output device including an electric motor that outputs power to a drive shaft by using the power output device.

Although the embodiments of the present invention have been described with reference to the embodiments, the present invention is not limited to these embodiments, and various embodiments may be made without departing from the gist of the present invention. Of course, it can be carried out.

[Brief description of the drawings]

FIG. 1 is a configuration diagram schematically showing a configuration of a vehicle 10 equipped with a power output device 20 according to one embodiment of the present invention.

FIG. 2 shows an HVECU 70 of the power output device 20 according to the embodiment.
5 is a flowchart showing an example of an output control routine executed by the CPU.

FIG. 3 is an explanatory diagram showing an example of a relationship between a battery SOC and a battery maximum output.

FIG. 4 is an explanatory diagram illustrating an example of a relationship between a battery maximum output and a battery discharge time.

FIG. 5 is an explanatory diagram showing an example of a relationship between a battery temperature T and a maximum output of a battery.

FIG. 6 is an explanatory diagram showing an example of an operation pattern of a vehicle equipped with the power output device 20 of the embodiment and a state of each device of the power output device 20.

[Explanation of symbols]

10 vehicles, 20 power output devices, 22 engines, 2
4 crankshaft, 26 flywheel damper,
28 engine output shaft, 32 inner rotor, 33,
43 permanent magnet, 34 outer rotor, 35, 45
Three-phase coil, 36 rotating brush, 38, 48 inverter, 41 rotating shaft, 42 rotor, 44 stator, 50
Battery, 52 current sensor, 54 voltage sensor, 5
6 temperature sensor, 60 engine ECU, 62 motor ECU, 64 battery ECU, 66, 67, 68 resolver, 70 HVECU, 72 accelerator pedal, 7
3 accelerator pedal position sensor, 74 brake pedal, 75 brake pedal position sensor, 76
Shift lever, 77 shift lever position sensor, 78 ignition switch, 90 drive shaft.

Continued on the front page (72) Inventor Masatoshi Uchida 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation F-term (reference) 3G093 AA05 AA07 AA16 DA06 DB01 DB09 DB11 DB15 DB19 DB20 DB23 FA10 FA11 5H115 PA00 PC06 PG04 PI16 PI21 PI22 PI29 PU10 PU22 PU23 PU24 PU25 PV09 PV23 QN02 SE04 SE05 SE06 TB02 TI05 TI10 TO12

Claims (6)

[Claims] 1. A power output device comprising at least one electric device driven by charging and discharging a battery, wherein a target for calculating a target output of the electric device based on an output required of the power output device. Output calculating means; battery output estimating means for estimating the output of the battery; and outputting the target output calculated by the target output calculating means from the electric device by the battery output estimating means. A power output device comprising: over-rated drive control means for driving and controlling the electric device such that the target output is output from the electric device within a predetermined time when it is estimated that the rated output is exceeded. 2. The over-rated drive control unit outputs the target output calculated by the target output calculation unit from the electric device by the battery output estimation unit, and the output of the battery exceeds the instantaneous rated output of the battery. Means for correcting the target output so that the output of the battery is equal to or less than the instantaneous rated output of the battery, and driving and controlling the electric device such that the corrected target output is output from the electric device. The power output device according to claim 1, wherein 3. The power output apparatus according to claim 1, wherein a battery state detecting unit that detects a state of the battery, and a time that sets the predetermined time based on the detected state of the battery. A power output device comprising setting means. 4. The power output apparatus according to claim 3, wherein said battery state detecting means is means for detecting a remaining charge of the battery and / or a temperature of the battery as the state of the battery. 5. A method for controlling a power output device including at least one electric device driven by charging and discharging a battery, comprising: (a) controlling the electric device based on an output required for the power output device; Calculating the target output; (b) estimating the output from the battery; and (c) when the output of the battery when outputting the calculated target output from the electric device exceeds the steady-state rated output of the battery. A control method of a power output device that drives and controls the electric device such that the target output is output from the electric device within a predetermined time when estimated. 6. The step (c) is performed when it is estimated that the output of the battery when outputting the target output calculated by the target output calculating means from the electric device exceeds the instantaneous rated output of the battery. And correcting the target output so that the output of the battery is equal to or less than the instantaneous rated output of the battery, and controlling the driving of the electric device such that the corrected target output is output from the electric device. The control method of the power output device described.