JP2009171646A - Power saving controller for electric car and electric car equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power saving controller capable of executing power saving control in accordance with the travelling distance to a charging station and the residual capacity of a battery. <P>SOLUTION: The power saving controller includes: a power fee acquiring section 34 for acquiring a power fee; a residual capacity acquiring section 38 for acquiring the residual capacity of a storage battery 110; a station distance acquiring section 44 for acquiring the travel distance from the present position to a charging station; a power saving propriety determining section 56 for determining whether or not the power saving driving of the electric car 100 is needed based on the power fee acquired by the power fee acquiring section 34, the residual capacity acquired by the residual capacity acquiring section 38 and the travel distance to a charging station acquired by the station distance acquiring means 44; and a power saving control section 58 for suppressing power consumption per unit travel distance of the electric car 100 when the power saving driving propriety determining section 56 determines that power saving driving is needed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a power saving control device for an electric vehicle and an electric vehicle including the same.

  At present, the number of facilities (hereinafter referred to as “charging stations”) that can charge an electric vehicle is extremely small compared to a gas station. In other words, if it is a gasoline car, it can be refueled by searching for a gas station after the remaining amount of fuel becomes small, but in an electric car, even if it starts searching for a charging station when the remaining battery capacity becomes small, There is a risk that the battery will run out because the charging station cannot be found.

In order to reduce the risk of such battery exhaustion, Patent Document 1 provides information on the position of a charging station existing within a distance that can be reached with the remaining battery capacity with respect to an electric vehicle at the start of driving or traveling A technology related to a charging station information providing server is disclosed.
JP 2007-148590 A

However, Patent Document 1 does not provide information on a charging station when there is no charging station within a distance that can be reached with the remaining battery capacity.
Therefore, the present invention provides the electric vehicle with the position information of the charging station existing in the vicinity regardless of whether or not the battery remaining capacity is within the reachable distance, and the travel distance to the charging station and the remaining battery capacity. An object of the present invention is to provide a power-saving control device that enables the electric vehicle to reach a charging station by performing power-saving control according to the capacity, and an electric vehicle including the power-saving control device.

1st invention is a power-saving control apparatus which suppresses the power consumption of the electric vehicle which drive | works using the electricity charged by the storage battery,
A power consumption acquisition unit for acquiring a power consumption that is an amount of power consumed per unit mileage by the electric vehicle;
A remaining capacity acquisition unit for acquiring a remaining capacity of the storage battery;
A stand distance acquisition unit for acquiring a travel distance from a current position to a charging stand capable of charging the storage battery;
The electric cost which is the amount of power consumed by the electric vehicle acquired by the electric cost acquisition unit per unit mileage, the remaining capacity of the storage battery acquired by the remaining capacity acquisition unit, and the charging stand acquired by the stand distance acquisition unit A power saving necessity determination unit that determines whether or not a power saving operation of the electric vehicle is necessary based on the travel distance to
When the power saving operation necessity determination unit determines that power saving operation is necessary, a power saving control unit that suppresses power consumption per unit mileage of the electric vehicle;
A power-saving control device comprising:

A second invention is the power saving control device according to the first invention,
A travelable distance calculating unit that calculates the distance that the electric vehicle can travel with the remaining capacity based on the power cost acquired by the power cost acquiring unit and the remaining capacity acquired by the remaining capacity acquiring unit;
The power saving necessity determination unit needs power saving operation of the electric vehicle based on the travelable distance calculated by the travelable distance calculation unit and the travel distance to the charging station acquired by the stand distance acquisition unit. It is a power-saving control device characterized by determining whether or not.

A third invention is the power saving control device according to the first invention,
The electric vehicle is charged based on a power consumption that is an amount of power consumed by the electric vehicle acquired by the electric power acquisition unit per unit travel distance and a travel distance to the charging station that is acquired by the stand distance acquisition unit. It has a stand required capacity calculation unit that calculates the electrical capacity required to reach the stand,
The power saving necessity determination unit requires power saving operation of the electric vehicle based on the required electric capacity calculated by the stand required capacity calculation unit and the remaining capacity of the storage battery acquired by the remaining capacity acquisition unit. It is a power-saving control device characterized by determining whether or not there is.

A fourth invention is the power saving control device according to the first invention,
A stand route acquisition unit for acquiring a route from the current position to the charging stand;
A stand traffic information acquisition unit for acquiring road traffic information of the route acquired by the stand route acquisition unit;
A standard power consumption storage unit for storing the standard power consumption of the electric vehicle according to the degree of traffic congestion;
The road indicated by the road congestion information stored by the standard power consumption storage unit, the route from the current position acquired by the stand route acquisition unit to the charging station, the road congestion information acquired by the stand congestion information acquisition unit Based on the standard power consumption according to the degree of traffic jam, a stand power cost calculation unit that calculates the average power cost of the stand in traveling from the current position to the charging station,
With
The power saving necessity determination unit includes a stand average power consumption in traveling from the current position to the charging stand calculated by the stand power consumption calculation unit, a remaining capacity of the storage battery acquired by the remaining capacity acquisition unit, and a stand distance acquisition unit. It is a power saving control device that judges whether or not the power saving operation of the electric vehicle is necessary based on the acquired travel distance to the charging station.

A fifth invention is the power saving control device according to the first invention,
An air conditioner for air conditioning the interior of the electric vehicle;
An air conditioner used power acquisition unit for acquiring power consumption consumed by the air conditioner;
A travel distance detector that detects a travel distance that the electric vehicle has traveled in the past predetermined time;
With
The power consumption calculation unit is configured to calculate an average air conditioner power consumption in traveling from the current position to the charging station based on the power consumption acquired by the air conditioner used power acquisition unit and the travel distance traveled detected by the travel distance detection unit. To calculate
The charge necessity determination unit obtains the average power consumption of the air conditioner in traveling from the current position to the charging stand calculated by the power consumption calculation unit, the remaining capacity of the storage battery acquired by the remaining capacity acquisition unit, and the stand distance acquisition unit The power saving control device determines whether or not the power saving operation of the electric vehicle is necessary based on the travel distance to the charging station.

A sixth invention is the power saving control device according to the first or third invention,
A destination distance acquisition unit for acquiring a travel distance to the destination;
The electric cost, which is the amount of power consumed by the electric vehicle acquired by the electric cost acquisition unit per unit travel distance, the remaining capacity of the storage battery acquired by the remaining capacity acquisition unit, and the destination acquired by the destination distance acquisition unit A charging necessity determination unit that determines whether or not the electric vehicle needs charging based on the travel distance to
With
The power saving control unit is a power saving control device that operates only when the charging necessity determination unit determines that charging is necessary.

A seventh invention is the power-saving control device according to the sixth invention,
A travelable distance calculation unit that calculates a distance that the electric vehicle can travel with the remaining capacity based on the remaining capacity of the storage battery acquired by the remaining capacity acquisition unit and the power consumption acquired by the power consumption acquisition unit; ,
The power saving necessity determination unit is configured based on the distance that the electric vehicle can travel with the remaining capacity calculated by the travelable distance calculation unit and the travel distance to the destination acquired by the destination distance acquisition unit. A power-saving control device that determines whether or not the electric vehicle needs to be charged.

An eighth invention is the power-saving control device according to the sixth invention,
Based on the distance acquired by the destination distance acquisition unit and the electricity cost acquired by the electricity cost acquisition unit, a destination required capacity calculation unit that calculates the electrical capacity required for the electric vehicle to reach the destination. With
The power saving necessity determination unit includes an electric capacity necessary for the electric vehicle calculated by the destination required capacity calculation unit to reach the destination, and a remaining capacity of the storage battery acquired by the remaining capacity acquisition unit. Based on the above, it is determined whether or not the electric vehicle needs to be charged.

A ninth invention is the power-saving control device according to the sixth invention,
A destination route acquisition unit for acquiring a route from the current position to the destination;
A destination congestion information acquisition unit for acquiring road congestion information of the route acquired by the destination route acquisition unit;
A standard power consumption storage unit for storing the standard power consumption of the electric vehicle according to the degree of traffic congestion;
The route from the current position acquired by the destination route acquisition unit to the destination, the road traffic congestion information from the current position acquired by the destination traffic jam information acquisition unit to the destination, and the standard electricity storage unit A destination electricity cost calculation unit that calculates a destination average electricity cost in traveling from the current position to the destination based on the standard electricity cost according to the degree of road traffic congestion indicated by the road traffic congestion information;
With
The charge necessity determination unit includes a destination average electricity cost in traveling from the current position to the destination calculated by the destination electricity cost calculation unit, a remaining capacity of the storage battery acquired by the remaining capacity acquisition unit, and the destination distance. The power-saving control device determines whether or not the electric vehicle needs to be charged based on a travel distance to the destination acquired by the acquisition unit.

A tenth aspect of the invention is the power saving control device according to the sixth aspect of the invention,
An air conditioner for air conditioning the interior of the electric vehicle;
An air conditioner used power acquisition unit for acquiring power consumption consumed by the air conditioner;
A travel distance detector that detects a travel distance that the electric vehicle has traveled in the past predetermined time;
With
The power consumption calculation unit calculates an average air conditioner power consumption for traveling from the current position to the destination based on the power consumption acquired by the air conditioner power consumption acquisition unit and the travel distance detected by the travel distance detection unit. Calculate
The charge necessity determination unit includes an average air conditioner power consumption for traveling from the current position to the destination calculated by the power consumption calculation unit, a remaining capacity of the storage battery acquired by the remaining capacity acquisition unit, and a destination distance acquisition unit. The power-saving control device determines whether or not the electric vehicle needs to be charged based on the acquired travel distance to the destination.

An eleventh invention is the power saving control device according to any of the first to third and sixth to eighth inventions,
A vehicle power consumption acquisition unit that acquires the power consumption consumed by the drive motor that drives the electric vehicle in the past predetermined time;
A travel distance detector that detects a travel distance that the electric vehicle has traveled in the past predetermined time;
A power consumption calculation unit that calculates an average power consumption in the past predetermined time of the electric vehicle based on the power consumption acquired by the vehicle power consumption acquisition unit and the travel distance detected by the travel distance detection unit;
With
The power consumption acquisition unit is a power saving control device that acquires the power consumption calculated by the power consumption calculation unit.

A twelfth invention is the power saving control device according to any one of the first to fourth, sixth to ninth, and eleventh inventions,
The electric vehicle includes an air conditioner that air-conditions the interior of the electric vehicle,
The power saving control unit is a power saving control device that suppresses power consumption of the electric vehicle by suppressing an amount of power consumed by the air conditioner.

A thirteenth invention is the power saving control device according to any of the first to twelfth inventions,
A limiter that regulates the output of the drive motor of the electric vehicle;
The power saving control unit is a power saving control device that suppresses power consumption of the electric vehicle by operating the limiter.

  14th invention is an electric vehicle provided with the power-saving control apparatus in any one of 1st-13th invention.

  ADVANTAGE OF THE INVENTION According to this invention, the power saving control apparatus which performs power saving control according to the travel distance to a charging stand and battery remaining capacity, and an electric vehicle provided with the same can be provided.

  FIG. 1 is a block configuration diagram of an electric vehicle 100 including a power saving control device 1 according to an embodiment of the present invention. As shown in the figure, an electric vehicle 100 includes a power saving control device 1, a storage battery 110, a storage battery wattmeter 112, a storage battery remaining capacity detector 120, an inverter 130, a drive motor 140, an air conditioner 150, and an EV (electric vehicle). A controller 160, an accelerator 162, a brake 164, a navigation system 200, and the like are provided.

  The storage battery 110 stores electricity supplied from an external power source or electricity generated by the drive motor 140 using the power of the wheels 142 when decelerating, as will be described later. Examples of the storage battery 110 include secondary batteries such as a lead storage battery, a silver / zinc storage battery, a lithium / ion storage battery, a nickel / metal hydroxide storage battery, a NaS battery, a nickel / zinc storage battery, a lithium metal storage battery, and a large-capacity, high-output capacitor. Use batteries.

The storage battery remaining capacity detector 120 detects the remaining capacity of the storage battery.
Inverter 130 converts the electricity stored in storage battery 110 from direct current to alternating current, and controls the output of 140 in accordance with a command from EV controller 160 described later.
The drive motor 140 drives the wheels 142 via a reduction gear (not shown).

The air conditioner 150 is an air conditioner that uses electricity supplied from the storage battery 110 to adjust the temperature inside the electric vehicle 100.
The air conditioner power meter 152 detects the power supplied to the air conditioner.

  When the accelerator 162 is depressed, the EV controller 160 transmits an acceleration command corresponding to the depression amount to the drive motor 140. In addition, when the brake 164 is depressed, the EV controller 160 transmits a deceleration command corresponding to the depression amount to the drive motor 140.

  The EV controller 160 includes the power saving control device 1 and a limiter 166. When the limiter 166 determines that the power saving operation is necessary in the power saving control device 1 (details will be described later), the limiter 166 sets the maximum value of the power supplied to the drive motor 140 to a predetermined value. That is, generally, the drive motor of an electric vehicle improves the power consumption per unit mileage (hereinafter referred to as “electric cost”) as the output is lower. Therefore, the power supplied to the drive motor 140 by the limiter 166 is set to a predetermined value or less. By doing so, the power consumption in the drive motor 140 can be suppressed.

  FIG. 2 is a diagram showing a detailed configuration of the navigation system 200. As shown in the figure, a GPS receiver 210, a vehicle speed sensor 220, a direction sensor 230, an input means 240, a storage means 250, a communication means 260, a navigation control means 270, and a display means 280 are provided.

The GPS receiver 210 measures the current position of the electric vehicle 100 by receiving radio waves from GPS satellites.
The vehicle speed sensor 220 detects the vehicle speed of the electric vehicle 100.
The direction sensor 230 detects the direction in which the electric vehicle 100 is traveling.

The input unit 240 is a touch panel that receives an input of a destination from a driver or the like (including a passenger).
The storage means 250 stores road map information and charging station position information.
The communication means 260 acquires road traffic jam information.

  The navigation control means 270 refers to the road map information stored in the storage means 250 and searches for a route from the current position measured by the GPS receiver 210 to the destination where the input means 240 accepted the input. When the power saving control device 1 determines that “charging is necessary” (details will be described later), the navigation control unit 270 refers to the road map information and the charging station position information stored in the storage unit 250 and performs GPS. The nearest charging station is searched from the current position measured by the receiver 210, and the route from the current position to the charging station is searched.

  Further, the navigation control means 270 is based on the vehicle speed detected by the vehicle speed sensor 220, the direction detected by the direction sensor 230, and the road map information stored in the storage means 250, and the electric vehicle 100 measured by the GPS receiver 210. It is also possible to correct the current position error, and when it is corrected, a route search or the like is performed using the corrected current position.

  The display unit 280 displays a route to the destination searched by the navigation control unit 270 on the screen for the driver of the electric vehicle 100.

  FIG. 3 is a block configuration diagram of the power saving control device 1 according to an embodiment of the present invention. As shown in the figure, the power saving control device 1 includes a standard electricity cost storage unit 22, a traffic jam information acquisition unit 24, an air conditioner power consumption acquisition unit 26, a travel distance acquisition unit 28, an electricity cost calculation unit 32, an electricity cost acquisition unit 34, a destination Distance acquisition unit 30, destination required capacity calculation unit 36, remaining capacity acquisition unit 38, charging necessity determination unit 40, stand information acquisition unit 44, stand information selection unit 46, stand distance acquisition unit 48, travelable distance calculation unit 50 , A power saving necessity determining unit 52, a power saving input receiving unit 54, a power saving necessity determining unit 56, and a power saving control unit 58.

  As shown in FIG. 4, the standard electricity consumption storage unit 22 stores the standard electricity consumption Es (hereinafter referred to as “standard electricity consumption Es”) when the electric vehicle 100 is operated in a normal manner without using the air conditioner 150. Memorize according to the degree of traffic jam. Note that the degree of road congestion is classified into, for example, “congestion”, “congestion”, and “smooth” based on the average speed of passing vehicles. More specifically, if the average speed of passing vehicles is 20 km / hour or less, the vehicle is classified as “congested”, if it is 40 km / hour or less, it is classified as “congested”, and if it exceeds 40 km / hour, “good”. Classify.

  In the example of FIG. 4, the standard power consumption Es when the road traffic condition is “smooth” is 0.10 kWh / km, and the standard power consumption Es when “road congestion” is 0.15 kWh / km. ", The standard electricity consumption Es is 0.20 kWh / km.

  The traffic jam information acquisition unit 24 acquires from the navigation system 200 the destination traffic jam information and the distance of each zone in each zone of the route from the current position searched by the navigation system 200 to the destination.

  FIG. 5 is a diagram illustrating a data configuration of the traffic jam information and the section distance of the road traffic jam information acquired by the traffic jam information acquisition unit 24. As shown in the figure, the traffic jam information acquisition unit 24 uses the traffic jam information for each section of the route from the current position to the destination (section X, section Y, section Z in the example of the figure) and each section. Get the distance.

  Similarly, the traffic jam information acquisition unit 24 navigates the station traffic jam information and the distance of each zone in each zone of the route from the current position searched by the navigation system 200 to the charging station acquired by the stand information acquisition unit 44 described later. Obtained from system 200.

  The air conditioner power consumption acquisition unit 26 acquires the power (kW) consumed by the air conditioner 150 in the past predetermined time (for example, the past 5 minutes) from the air conditioner power meter 152.

  The travel distance acquisition unit 28 acquires the distance traveled by the electric vehicle 100 in the past predetermined time (for example, the past 5 minutes). For example, based on the value of a distance meter (not shown) possessed by the electric vehicle 100, the travel distance of the past predetermined time is obtained by taking the difference between the value of the distance meter before the predetermined time and the value of the distance meter at the present time. To do.

  The destination distance acquisition unit 30 acquires the travel distance from the current position calculated by the navigation system 200 to the destination.

  The power consumption calculation unit 32 uses the standard power consumption Es stored in the standard power consumption storage unit 22, the destination traffic congestion information acquired by the traffic congestion information acquisition unit 24, and the consumption due to the use of the air conditioner in the past predetermined time acquired by the air conditioner usage power acquisition unit 26. Based on the amount of electric power and the distance traveled by the electric vehicle 100 in the past predetermined time detected by the travel distance acquisition unit 28, the average power consumption when the air conditioner is turned off when traveling from the current position to the destination without using the air conditioner. An average air conditioner destination electricity cost Ec1 when traveling using En1 and an air conditioner is calculated. Specifically, this calculation is performed according to the procedure shown in the following (a) to (h).

(A) The standard electricity consumption Es stored in the standard electricity consumption storage unit 22 is referred to, and the standard electricity consumption Es in each section is determined based on the congestion information of each section acquired by the congestion information acquisition unit 24. For example, since section Y has information that “congested” traffic congestion has occurred, it is determined that 0.15 kWh / km at the time of “crowded” is the standard power consumption Es by referring to the standard power consumption storage unit 22. To do.

(B) Based on the standard electricity consumption Es of each section and the distance of each section, the air conditioner-cut destination average electricity consumption En1 is calculated. For example, if the section of the route from the current position to the destination is three sections, section X, section Y, and section Z, the calculation shown in Expression (1) is performed.
Destination average electricity cost En = {(electric charge in section X 0.10 kWh / km) × (distance X distance 20 km) + (electric charge 0.15 kWh / km in section Y) × (distance Y distance 8 km) + ( Electricity consumption of section Z 0.20 kWh / km) × (distance Z distance 10 km)} / (total of sections X, Y, Z 40 km) = 0.13 kWh / km (1)

(C) Based on the road traffic information acquired by the traffic information acquisition unit 24, the vehicle speed of the electric vehicle 100 in each section on the route is estimated. For example, the vehicle speed is assumed to be 10 km / hour if the section is “congested”, 30 km / hour if the section is “congested”, and if the section is “smooth”, the vehicle speed is Suppose that it is the speed limit of the road.

(D) By dividing the distance of each section acquired by the traffic jam information acquiring unit 24 by the vehicle speed in each section estimated in the procedure (c), the time required to pass through each section of the vehicle is calculated.

(E) The air-conditioner power consumption (kWh) in each section is calculated by multiplying the air-conditioner power consumption (kW) acquired by the air-conditioner used power acquisition unit 26 by each section passage time.

(F) The total amount of power consumption of the air conditioner in each section is calculated.
(G) The total air-conditioner power consumption calculated in step (f) is divided by the distance of the route to calculate the air-conditioner power consumption (kWh / km) per unit distance.

(H) The air conditioner power consumption per unit distance calculated in the procedure (g) is added from the air conditioner cut destination average power consumption En1 calculated in the procedure (b), and the air conditioner is used on the route. The air conditioner destination destination average electricity cost Ea1 is calculated.

  Similarly, the power cost calculation unit 32 similarly stores the standard power cost Es stored in the standard power cost storage unit 22, the stand traffic information acquired by the traffic information acquisition unit 24, and the past predetermined time acquired by the air conditioner power consumption acquisition unit 26. The air conditioner when traveling from the current position to the destination without using the air conditioner based on the amount of power consumed by using the air conditioner and the distance traveled by the electric vehicle 100 in the past predetermined time detected by the travel distance acquisition unit 28 The stand average power consumption En2 and the average power consumption Ec2 with the air conditioner when traveling using the air conditioner are calculated.

  The electricity cost obtaining unit 34 obtains the air conditioner-off destination average electricity cost En1, the air-conditioner entrance destination average electricity cost Ec1, the air-conditioner-off stand average electricity cost En2, and the air-conditioner-on-stand average electricity cost Ec2 calculated by the electricity cost calculation unit 32.

  Based on the distance acquired by the destination distance acquisition unit 30 and the electricity cost acquired by the electricity cost acquisition unit 34, the required destination capacity calculation unit 36 has an electrical capacity Bg required for the electric vehicle 100 to reach the destination. (Hereinafter referred to as “required electric capacity Bg”). Specifically, the required electric capacity Bg is calculated by dividing the travel distance (km) from the current position to the destination by the air conditioner destination average electricity cost Ec1 (kWh / km) acquired by the electricity cost acquisition unit 34.

  The remaining capacity acquisition unit 38 acquires the remaining capacity Br of the storage battery 110 from the storage battery remaining capacity detector 120.

  The charging necessity determination unit 40 determines that charging is unnecessary if the remaining capacity Br acquired by the remaining capacity acquisition unit 38 exceeds the required electric capacity Bg calculated by the destination required capacity calculation unit 36, and the remaining capacity Br is required. If it does not exceed the electric capacity Bg, it is determined that charging is necessary.

  In the above description, the charging necessity determination unit 40 determines the necessity of charging by comparing the remaining capacity Br and the required electric capacity Bg. However, the necessity of charging may be determined by the following procedure. That is, based on the remaining capacity of the storage battery 110 acquired by the remaining capacity acquisition unit 38 and each power cost acquired by the power cost acquisition unit 34, the travelable distance calculation unit 50 can travel the electric vehicle 100 with the remaining capacity. Calculate the distance. Then, the power saving necessity determination unit 40 calculates the distance that the electric vehicle 100 calculated by the travelable distance calculation unit 50 can travel with the remaining capacity and the travel distance to the destination acquired by the destination distance acquisition unit 30. Based on this, it is determined whether or not the electric vehicle 100 needs to be charged.

  When the charging necessity determination unit 40 determines that “charging is necessary”, the stand information acquisition unit 44 refers to the navigation system 200 and sets a predetermined charging station candidate for charging the electric vehicle 100 from the current position. Obtain the location information of the charging station located within the distance. In addition, when there is no charging station within a predetermined distance (for example, 10 km), position information of N charging stations (for example, three positions) located in the vicinity of the current position is acquired.

  The stand selection unit 46 accepts selection of any one of the charging stations from which the stand information acquisition unit 44 has acquired the position information from a driver or the like.

  The stand distance acquisition unit 48 inquires and acquires the travel distance Ds (hereinafter referred to as “charging stand distance Ds”) from the current position to the charging stand accepted by the stand selection unit 46 from the navigation system 200.

  The travelable distance calculation unit 50 divides the remaining capacity Br by the average power consumption Ec2 with the air conditioner-entered stand acquired by the power consumption acquisition unit 34, so that the distance Dp (hereinafter, “ Air-conditioner entering travelable distance Dp ”) is calculated.

  In addition, the travelable distance calculation unit 50 divides the remaining capacity Br by the average power consumption En2 of the air conditioner cut stand acquired by the power consumption acquisition unit 34, so that the remaining capacity Br can travel without using an air conditioner Dq ( Dq ≧ Dp, hereinafter referred to as “Air-conditioner-off travelable distance Dq”).

  The power saving necessity determination unit 52 determines that the power saving operation is unnecessary if the air conditioner entering travelable distance Dp exceeds the charging stand distance Ds, and if the air conditioner entering travel possible distance Dp does not exceed the charging stand distance Ds, the power saving operation is necessary. judge.

  Further, the power saving necessity determination unit 52 determines that the power saving only by stopping the use of the air conditioner 150 is sufficient if the air conditioner-off travelable distance Dq exceeds the charging stand distance Ds. If the air conditioner-off travelable distance Dq does not exceed the charging stand distance Ds, it is determined that not only power saving due to the stop of use of the air conditioner 150 but also power saving of the drive motor 140 by the limiter 166 is necessary.

  In the above description, the power saving necessity determination unit 52 determines whether or not power saving is necessary by comparing the distance Dp that can be entered into the air conditioner and the charging stand distance Ds. Also good. That is, the stand required capacity calculation unit (not shown) calculates the power consumption that is the amount of power consumed per unit mileage by the electric vehicle 100 acquired by the power consumption acquisition unit 34 and the charging station acquired by the stand distance acquisition unit 48. Based on the travel distance, the electric capacity required for the electric vehicle 100 to reach the charging station is calculated. The power saving necessity determination unit 52 requires power saving operation of the electric vehicle 100 based on the required electric capacity calculated by the stand required capacity calculation unit and the remaining capacity of the storage battery 110 acquired by the remaining capacity acquisition unit 38. It is determined whether or not.

  The power saving input receiving unit 54 will continue to use the air conditioner 150 from the driver or the like if the driver or the like wants to continue using the air conditioner 150 in a hot season even when the remaining capacity Br is small in the storage battery 110. Accept the input. In addition, when the driver determines that the limiter 166 should not be operated based on road conditions such as a road in which the lane is congested, the power saving input reception unit 54 inputs that the limiter 166 is not operated from the driver or the like. Accept.

  The power saving necessity determination unit 56 determines a power saving target based on the result determined by the power saving necessity determination unit 52 and the input content received by the power saving input reception unit 54. That is, when the power saving necessity determination unit 52 determines that the power saving operation by the air conditioner 150 and the drive motor 140 is necessary, it determines to turn off the air conditioner 150 and to turn on the limiter 166. However, when the power saving input receiving unit 54 receives an input indicating that the use of the air conditioner 150 is continued, the power saving input receiving unit 54 determines to turn on the air conditioner 150. In addition, when the power saving input receiving unit 54 receives an input indicating that the limiter 166 is not operated, the power saving input receiving unit 54 determines to turn off the limiter 166.

  On the other hand, if the power saving necessity determination unit 52 determines that power saving of only the air conditioner 150 is sufficient, it determines to turn off the air conditioner 150. However, when the power saving input reception unit 54 receives an input indicating that the operation of the air conditioner 150 is to be continued, it is determined to turn on the air conditioner 150 and to turn on the limiter 166. When the power saving input receiving unit 54 receives an input indicating that the limiter 166 is not operated, the power saving input receiving unit 54 determines to turn off the limiter 166.

  The power saving control unit 58 performs power saving by suppressing power consumption in the drive motor 140 and the air conditioner 150 based on the power saving determination by the power saving necessity determination unit 56. Specifically, based on the determination of the power saving necessity determination unit 56, the power saving control unit 58 performs the on / off control of the limiter 166 and the on / off control of the air conditioner 150, thereby suppressing electricity consumption. . That is, in general, a drive motor of an electric vehicle has a lower power consumption as the output is lower. Therefore, by reducing the power supplied to the drive motor 140 by the limiter 166, the power consumption in the drive motor 140 is suppressed. be able to.

  FIGS. 6A, 6 </ b> B, and 6 </ b> C are flowcharts illustrating control processing performed by the power saving control device 1.

  The traffic jam information acquisition unit 24 acquires traffic jam information from the navigation system 200 (S602 in FIG. 6A). Further, the air conditioner used power acquisition unit 26 acquires the used power of the air conditioner 150 for the past predetermined time (S604). The travel distance acquisition unit 28 acquires the travel distance of the past predetermined time (S606).

  The power consumption calculation unit 32 includes the standard power consumption stored in the standard power consumption storage unit 22, the destination traffic congestion information acquired by the traffic congestion information acquisition unit 24, and the air conditioner of the past predetermined time acquired by the air conditioner usage power acquisition unit 26. Based on the electric power used and the travel distance in the past predetermined time acquired by the travel distance acquisition unit 28, the air conditioner destination average power consumption Ec1 when traveling using the air conditioner 150, and traveling without using the air conditioner 150 In this case, the air conditioner cut destination average power consumption En1 is calculated (S608).

  In addition, the power consumption calculation unit 32 includes the standard power consumption stored in the standard power consumption storage unit 22, the station traffic congestion information acquired by the traffic congestion information acquisition unit 24, and the air conditioner for the past predetermined time acquired by the air conditioner power consumption acquisition unit 26. Traveled without using the air conditioner 150 and the average power consumption Ec2 with the air conditioner when traveling using the air conditioner 150, based on the travel power acquired by the travel distance acquisition unit 28 in the past predetermined time. In this case, the average power consumption En2 of the air-conditioning stand is calculated (S608).

  The destination distance acquisition unit 30 acquires a travel distance from the current position to the destination from the navigation system 200 (S610). The required destination capacity calculation unit 36 calculates the required electrical capacity Bg based on the distance acquired by the destination distance acquisition unit 30 and the power cost acquired by the power cost acquisition unit 34 (S612). The remaining capacity acquisition unit 38 acquires the remaining capacity Br from the storage battery remaining capacity detector 120 (S614).

  If the remaining capacity Br exceeds the required electrical capacity Bg, the charging necessity determination unit 40 determines that charging is unnecessary (S616: NO), and the process of the power saving control device 1 ends. On the other hand, if the remaining capacity Br does not exceed the electric capacity Bg, it is determined that charging is necessary (S616: YES), and the stand information acquisition unit 44 determines from the navigation system 200 N locations (for example, 5 locations) located near the current position. The location information of the charging station at (location) is acquired (S618). The stand selection unit 46 receives the selection of any one of the charging stations from which the stand information acquisition unit 44 has acquired the position information from the driver or the like (S620). The stand distance acquisition unit 48 acquires the travel distance Ds from the current position to the selected charging stand from the navigation system 200. (S622).

  The travelable distance calculation unit 50 divides the remaining capacity Br by the air conditioner-entered stand average power consumption Ec2, thereby calculating an air conditioner-enterable travel distance Dp that can travel using the air conditioner 150 with the remaining capacity Br (S624). Further, the travelable distance calculation unit 50 divides the remaining capacity Br by the air conditioner-off stand average power consumption En2, thereby calculating an air-conditioner travelable distance Dq that can travel without using the air conditioner 150 with the remaining capacity (S626). .

  The power saving necessity determination unit 52 determines that the power saving operation is unnecessary if the air conditioner entering travelable distance Dp exceeds the charging stand distance Ds from the current position acquired by the stand distance acquisition unit 48 (S628: YES), and power saving control. The process of the device 1 ends. On the other hand, it is determined that the power saving operation is necessary unless the air conditioner entering travelable distance Dp exceeds the charging stand distance Ds (S628: NO).

  Next, the power saving necessity determination unit 52 determines that the power saving only by stopping the use of the air conditioner 150 is sufficient when the air conditioner-off travelable distance Dq exceeds the charging stand distance Ds (S630: YES) (S632). The process proceeds to S642 in FIG. On the other hand, if the air-conditioner-off travelable distance Dq does not exceed the charging stand distance Ds (S630: NO), the power-saving necessity determination unit 52 not only saves power by stopping the use of the air-conditioner 150 but also the drive motor 140 by the limiter 166. It is determined that power saving is also necessary (S634), and the process proceeds to S662 in FIG.

  The power saving input receiving unit 54 receives input from a driver or the like regarding whether or not the air conditioner 150 and the limiter 166 can be used (S642 in FIG. 6B). If the air conditioner 150 may be turned off based on the content received by the power saving input accepting unit 54 (S644: YES), the power saving control unit 58 turns off the air conditioner 150 (S646) and the process ends.

  On the other hand, if the air conditioner 150 should not be turned off based on the content received by the power saving input accepting unit 54 (S644: NO), the power saving control unit 58 keeps the air conditioner 150 on (S648) The process proceeds to S650.

  If the limiter 166 may be turned on based on the content received by the power saving input receiving unit 54 (S650: YES), the power saving control unit 58 turns on the limiter 166 (S652), and the process ends. When the limiter 166 should not be turned on (S650: NO), the power saving control unit 58 ends with the limiter 166 turned off (S654).

  Further, the power saving input receiving unit 54 receives an input from a driver or the like regarding whether or not the air conditioner 150 and the limiter 166 can be used (S662 in FIG. 6C). If the air conditioner 150 may be turned off based on the content received by the power saving input receiving unit 54 (S664: YES), the power saving control unit 58 turns off the air conditioner 150 (S666), and proceeds to S670.

  On the other hand, if the air conditioner 150 should not be turned off based on the content received by the power saving input accepting unit 54 (S664: NO), the power saving control unit 58 keeps the air conditioner 150 on (S668), The process proceeds to S670.

  If the limiter 166 may be turned on based on the content received by the power saving input accepting unit 54 (S670: YES), the power saving control unit 58 turns on the limiter 166 (S672) and the process ends. When the limiter 166 should not be turned on (S670: NO), the power saving control unit 58 ends with the limiter 166 turned off (S674).

  As described above, according to the power saving control device 1 of the present embodiment, the power saving control is performed according to the travel distance to the destination or the charging station and the remaining battery capacity, thereby extending the travelable distance with the remaining battery capacity. Can do. Thereby, even if there is little battery remaining capacity, it can reach | attain a charging stand, and can prevent the storage battery 110 from running out of the battery.

  Further, according to the power saving control device 1, the power saving control can be performed in consideration of the amount of power used by the air conditioner 150 by providing the air conditioner used power acquisition unit 26. In other words, if the air conditioner 150 is stopped and the limiter 166 can sufficiently reach the charging station without performing the power saving operation of the drive motor 140, it is possible to save power only for the air conditioner 150.

  Further, according to the power saving control device 1, by acquiring the traffic jam information in the traffic jam information acquiring unit 24, the power saving control can be performed in consideration of the road traffic jam of the route from the current position to the destination or the charging station. . That is, when the road of the route is congested or congested, the electricity cost generally deteriorates, and the distance that can be traveled with the remaining capacity of the storage battery 110 is shorter than when the road is not congested. In this way, it is possible to determine whether or not power saving is necessary in consideration of road congestion or traffic jam, and perform power saving control.

  Further, according to the power saving control device 1, the power saving input receiving unit 54 can receive an input of continuing use of the air conditioner 150 from a driver or the like. As a result, in a hot season such as summer, the air conditioner 150 can be prevented from mechanically stopping, thereby contributing to safe driving of the driver. In addition, the power saving input receiving unit 54 can receive an input indicating that the limiter 166 is not used from a driver or the like. This can prevent the limiter 166 from starting mechanically when the acceleration performance of the electric vehicle 100 is dull on the route where the traffic is heavy and the road is congested, which adversely affects driving safety. This can contribute to the safe driving of the driver.

Next, the power saving control apparatus 2 which is another embodiment of this invention is demonstrated.
FIG. 7 is a diagram showing a power saving control device 2 which is another embodiment of the present invention. In the power saving control device 1 of the above-described embodiment, the average power consumption is calculated based on the standard power cost Es stored in the standard power cost storage unit 22, the road traffic congestion information acquired by the traffic jam information acquisition unit 24, and the distance of each section. However, in the power saving control device 2 of the present embodiment, the calculation is performed based on the power consumption of the electric vehicle 100 acquired by the vehicle power consumption acquisition unit 60 as described later.

  The storage battery wattmeter 112 is power supplied from the storage battery 110 to each electric device included in the electric vehicle 100 such as an air conditioner 150, a headlight (not shown), a car stereo (not shown), a navigation system 200, and the drive motor 140. Detect the amount.

  The vehicle power usage acquisition unit 60 acquires from the storage battery power meter 112 the power (kW) consumed by each electric device and the drive motor 140 in the past predetermined time (for example, the past 5 minutes).

  The power consumption calculation unit 32 includes the amount of power consumed in the past predetermined time (for example, the past 5 minutes) acquired by the vehicle power consumption acquisition unit 60 (including the amount of power consumed by the air conditioner if air conditioner use is used), Based on the distance traveled by the electric vehicle 100 in the past predetermined time (for example, in the past 5 minutes) detected by the travel distance acquisition unit 28, the average power consumption in the past predetermined time in traveling from the current position to the destination (air conditioner average) The actual result of power consumption Ec3) is calculated. In addition, the power consumption calculation unit 32 includes a power consumption amount obtained by subtracting the power consumption amount in the air conditioner from the power consumption amount in the past predetermined time (for example, the past 5 minutes) acquired by the automobile power consumption acquisition unit 60, and a travel distance acquisition unit. Based on the distance traveled by the electric vehicle 100 in the past predetermined time (for example, the past 5 minutes) detected by the vehicle 28, it is assumed that the air conditioner 150 for the past predetermined time in traveling from the current position to the destination has not been used. In this case, the average power consumption (air conditioner average power consumption En3) is calculated.

  The electricity cost calculation unit 32 may calculate the electricity cost (kWh / km) based on the power consumption (kW) of the electric vehicle 100 and the traveling speed (km / h). That is, the travel speed acquisition unit (not shown) acquires the travel speed from a speedometer (not shown) provided in the electric vehicle 100. Then, the power consumption is calculated by dividing the power consumption (kW) acquired by the automobile power consumption acquisition unit 60 by the travel speed.

  The units 26 to 30 and 34 to 54 included in the power saving control device 2 other than the above perform the same control as the control performed in the power saving control device 1. In the calculation of the destination required capacity calculation unit 36 and the travelable distance calculation unit 50, the air conditioner input average power consumption Ec3 is used instead of the air conditioner input destination average power consumption Ec1 and the air conditioner input stand average power consumption Ec2. Similarly, in the calculation of the required destination capacity calculation unit 36 and the travelable distance calculation unit 50, the air conditioner cut average power consumption En3 is used in place of the air conditioner cut destination average power cost En1 and the air conditioner cut stand average power cost En2.

  As described above, the power saving control device 2 of the present embodiment can also extend the distance that can be traveled with the remaining battery capacity by performing the power saving control according to the travel distance to the destination or the charging station and the remaining battery capacity. it can. Thereby, even if there is little battery remaining capacity, it can reach | attain a charging stand, and can prevent the storage battery 110 from running out of the battery.

  In addition, the description of the above embodiment is for facilitating understanding of the present invention, and does not limit the present invention. It goes without saying that the present invention can be changed and improved without departing from the gist thereof, and that the present invention includes equivalents thereof.

It is a block block diagram of the electric vehicle 100 implement | achieved using the power saving control apparatus 1 which is one Embodiment of this invention. 2 is a diagram showing a detailed configuration of a navigation system 200. FIG. It is a block block diagram of the power-saving control apparatus 1 which is one Embodiment of this invention. It is a figure which shows the data structure of the standard electricity consumption which the standard electricity consumption memory | storage part 22 memorize | stores. It is a figure which shows the data structure about the traffic congestion information and section distance of the road traffic congestion information which the traffic congestion information acquisition part 24 acquires. It is a flowchart which shows the control processing which the power saving control apparatus 1 performs. It is a flowchart which shows the control processing which the power saving control apparatus 1 performs. It is a flowchart which shows the control processing which the power saving control apparatus 1 performs. It is a figure which shows the power-saving control apparatus 2 which is another embodiment of this invention.

Explanation of symbols

1, 2 Power saving control device 22 Standard electricity cost storage unit 24 Traffic jam information acquisition unit 26 Air conditioner power consumption acquisition unit 28 Travel distance acquisition unit 30 Destination distance acquisition unit 32 Electricity cost calculation unit 34 Electricity cost acquisition unit 36 Destination required capacity calculation unit 38 Remaining Capacity acquisition unit 40 Charging necessity determination unit 44 Stand information acquisition unit 46 Stand selection unit 48 Stand distance acquisition unit 50 Travelable distance calculation unit 52 Power saving necessity determination unit 54 Power saving input reception unit 56 Power saving necessity determination unit 58 Power saving control unit 60 Vehicle power consumption acquisition unit 100 Electric vehicle 110 Storage battery 112 Battery power meter 120 Battery remaining capacity detector 130 Inverter 140 Drive motor 142 Wheel 150 Air conditioner 152 Air conditioner power meter 160 EV controller 162 Accelerator 164 Brake 166 Limiter 200 Navigation system 210 GP S receiver 220 vehicle speed sensor 230 direction sensor 240 input means 250 storage means 260 communication means 270 navigation control means 280 display means

Claims (14)

A power-saving control device that suppresses power consumption of an electric vehicle that travels using electricity charged in a storage battery,
A power consumption acquisition unit for acquiring a power consumption that is an amount of power consumed per unit mileage by the electric vehicle;
A remaining capacity acquisition unit for acquiring a remaining capacity of the storage battery;
A stand distance acquisition unit for acquiring a travel distance from a current position to a charging stand capable of charging the storage battery;
The electric cost which is the amount of power consumed by the electric vehicle acquired by the electric cost acquisition unit per unit mileage, the remaining capacity of the storage battery acquired by the remaining capacity acquisition unit, and the charging stand acquired by the stand distance acquisition unit A power saving necessity determination unit that determines whether or not a power saving operation of the electric vehicle is necessary based on the travel distance to
When the power saving operation necessity determination unit determines that power saving operation is necessary, a power saving control unit that suppresses power consumption per unit mileage of the electric vehicle;
A power saving control device comprising: The power saving control device according to claim 1,
A travelable distance calculating unit that calculates the distance that the electric vehicle can travel with the remaining capacity based on the power cost acquired by the power cost acquiring unit and the remaining capacity acquired by the remaining capacity acquiring unit;
The power saving necessity determination unit needs power saving operation of the electric vehicle based on the travelable distance calculated by the travelable distance calculation unit and the travel distance to the charging station acquired by the stand distance acquisition unit. It is judged whether it is, The power saving control apparatus characterized by the above-mentioned. The power saving control device according to claim 1,
The electric vehicle is charged based on a power consumption that is an amount of power consumed by the electric vehicle acquired by the electric power acquisition unit per unit travel distance and a travel distance to the charging station that is acquired by the stand distance acquisition unit. It has a stand required capacity calculation unit that calculates the electrical capacity required to reach the stand,
The power saving necessity determination unit requires power saving operation of the electric vehicle based on the required electric capacity calculated by the stand required capacity calculation unit and the remaining capacity of the storage battery acquired by the remaining capacity acquisition unit. It is determined whether or not there is a power saving control device. The power saving control device according to claim 1,
A stand route acquisition unit for acquiring a route from the current position to the charging stand;
A stand traffic information acquisition unit for acquiring road traffic information of the route acquired by the stand route acquisition unit;
A standard power consumption storage unit for storing the standard power consumption of the electric vehicle according to the degree of traffic congestion;
The road indicated by the road congestion information stored by the standard power consumption storage unit, the route from the current position acquired by the stand route acquisition unit to the charging station, the road congestion information acquired by the stand congestion information acquisition unit Based on the standard power consumption according to the degree of traffic jam, a stand power cost calculation unit that calculates the average power cost of the stand in traveling from the current position to the charging station,
With
The power saving necessity determination unit includes a stand average power consumption in traveling from the current position to the charging stand calculated by the stand power consumption calculation unit, a remaining capacity of the storage battery acquired by the remaining capacity acquisition unit, and a stand distance acquisition unit. A power-saving control device that determines whether or not power-saving operation of the electric vehicle is necessary based on the acquired travel distance to the charging station. The power saving control device according to claim 1,
An air conditioner for air conditioning the interior of the electric vehicle;
An air conditioner used power acquisition unit for acquiring power consumption consumed by the air conditioner;
A travel distance detector that detects a travel distance that the electric vehicle has traveled in the past predetermined time;
With
The power consumption calculation unit is configured to calculate an average air conditioner power consumption in traveling from the current position to the charging station based on the power consumption acquired by the air conditioner used power acquisition unit and the travel distance traveled detected by the travel distance detection unit. To calculate
The charge necessity determination unit obtains the average power consumption of the air conditioner in traveling from the current position to the charging stand calculated by the power consumption calculation unit, the remaining capacity of the storage battery acquired by the remaining capacity acquisition unit, and the stand distance acquisition unit And determining whether or not the power saving operation of the electric vehicle is necessary based on the travel distance to the charging station. The power saving control device according to claim 1 or 3,
A destination distance acquisition unit for acquiring a travel distance to the destination;
The electric cost, which is the amount of power consumed by the electric vehicle acquired by the electric cost acquisition unit per unit travel distance, the remaining capacity of the storage battery acquired by the remaining capacity acquisition unit, and the destination acquired by the destination distance acquisition unit A charging necessity determination unit that determines whether or not the electric vehicle needs charging based on the travel distance to
With
The power saving control unit operates only when the charging necessity determination unit determines that charging is necessary. The power saving control device according to claim 6,
A travelable distance calculation unit that calculates a distance that the electric vehicle can travel with the remaining capacity based on the remaining capacity of the storage battery acquired by the remaining capacity acquisition unit and the power consumption acquired by the power consumption acquisition unit; ,
The power saving necessity determination unit is configured based on the distance that the electric vehicle can travel with the remaining capacity calculated by the travelable distance calculation unit and the travel distance to the destination acquired by the destination distance acquisition unit. A power-saving control device that determines whether or not the electric vehicle needs to be charged. The power saving control device according to claim 6,
Based on the distance acquired by the destination distance acquisition unit and the electricity cost acquired by the electricity cost acquisition unit, a destination required capacity calculation unit that calculates the electrical capacity required for the electric vehicle to reach the destination. With
The power saving necessity determination unit includes an electric capacity necessary for the electric vehicle calculated by the destination required capacity calculation unit to reach the destination, and a remaining capacity of the storage battery acquired by the remaining capacity acquisition unit. Based on the above, it is determined whether or not the electric vehicle needs to be charged. The power saving control device according to claim 6,
A destination route acquisition unit for acquiring a route from the current position to the destination;
A destination congestion information acquisition unit for acquiring road congestion information of the route acquired by the destination route acquisition unit;
A standard power consumption storage unit for storing the standard power consumption of the electric vehicle according to the degree of traffic congestion;
The route from the current position acquired by the destination route acquisition unit to the destination, the road traffic congestion information from the current position acquired by the destination traffic jam information acquisition unit to the destination, and the standard electricity storage unit A destination electricity cost calculation unit that calculates a destination average electricity cost in traveling from the current position to the destination based on the standard electricity cost according to the degree of road traffic congestion indicated by the road traffic congestion information;
With
The charge necessity determination unit includes a destination average electricity cost in traveling from the current position to the destination calculated by the destination electricity cost calculation unit, a remaining capacity of the storage battery acquired by the remaining capacity acquisition unit, and the destination distance. A power-saving control device that determines whether or not the electric vehicle needs to be charged based on a travel distance to a destination acquired by an acquisition unit. The power saving control device according to claim 6,
An air conditioner for air conditioning the interior of the electric vehicle;
An air conditioner used power acquisition unit for acquiring power consumption consumed by the air conditioner;
A travel distance detector that detects a travel distance that the electric vehicle has traveled in the past predetermined time;
With
The power consumption calculation unit calculates an average air conditioner power consumption for traveling from the current position to the destination based on the power consumption acquired by the air conditioner power consumption acquisition unit and the travel distance detected by the travel distance detection unit. Calculate
The charge necessity determination unit includes an average air conditioner power consumption for traveling from the current position to the destination calculated by the power consumption calculation unit, a remaining capacity of the storage battery acquired by the remaining capacity acquisition unit, and a destination distance acquisition unit. A power-saving control device that determines whether or not the electric vehicle needs to be charged based on the acquired travel distance to the destination. It is a power-saving control apparatus in any one of Claims 1-3, 6-8,
A vehicle power consumption acquisition unit that acquires the power consumption consumed by the drive motor that drives the electric vehicle in the past predetermined time;
A travel distance detector that detects a travel distance that the electric vehicle has traveled in the past predetermined time;
A power consumption calculation unit that calculates an average power consumption in the past predetermined time of the electric vehicle based on the power consumption acquired by the vehicle power consumption acquisition unit and the travel distance detected by the travel distance detection unit;
With
The power saving control device is characterized in that the power consumption acquisition unit acquires the power consumption calculated by the power consumption calculation unit. It is a power-saving control apparatus in any one of Claims 1-4, 6-9, 11,
The electric vehicle includes an air conditioner that air-conditions the interior of the electric vehicle,
The power saving control unit suppresses power consumption of the electric vehicle by suppressing an amount of power consumed by the air conditioner. The power saving control device according to any one of claims 1 to 12,
A limiter that regulates the output of the drive motor of the electric vehicle;
The power saving control unit suppresses power consumption of the electric vehicle by operating the limiter.   An electric vehicle comprising the power saving control device according to claim 1.