JP2014053989A - Battery charge/discharge system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the degree of contribution of a battery in an electric vehicle to leveling of power demand in the case of excessive power supply, by controlling rechargeable capacity of the battery in the electric vehicle before the electric vehicle is connected to a charge/discharge PCS.SOLUTION: A battery charge/discharge system 1 comprises an EV information management device 30 capable of communicating with an electric vehicle 20 and a power management system 10. The EV information management device 30 transmits a battery rechargeable capacity increase instruction to the electric vehicle 20 on the basis of a charge/discharge plan acquired from the power management system 10 and a remaining amount and rechargeable capacity of a battery 21 acquired from the electric vehicle 20. The electric vehicle 20 comprises a vehicle power management device 27 for controlling the electric vehicle 20 so as to promote decrease in the remaining amount of the battery 21 of the electric vehicle 20, on the basis of the battery rechargeable capacity increase instruction from the EV information management device.

Description

  The present invention relates to a battery charge / discharge system for an electric vehicle.

  An electric vehicle (EV: Electric Vehicle) that obtains power by driving a motor with electric power of a secondary battery (battery) generally has a shorter cruising distance than a conventional gasoline vehicle. As a technique for resolving the user's anxiety about the cruising distance of an electric vehicle, for example, Patent Document 1 devises a system that replaces a battery consumed by running at a charging facility in each place with a fully charged battery. According to this system, long-distance movement by an electric vehicle is possible without requiring time for charging the battery. The system of Patent Document 1 comprehensively manages the position information (GPS (Global Positioning System) information) of an electric vehicle and the remaining amount of electric power stored in a battery (hereinafter simply referred to as “remaining amount”) through an Internet line. The electric vehicle user is guided to a charging facility where the battery can be replaced.

  A next-generation power network system that balances power supply and demand by controlling the flow of power in the power network from both the power supply side and the demand side is called “smart grid” and has attracted attention in recent years. In the smart grid, a battery is used as a buffer for leveling electric power demand, and an attempt has been made to use, for example, an electric vehicle battery as the buffer.

  The battery of the current electric vehicle has a charging capacity of about 15 kWh even if it is a mini passenger car type. This is a capacity that can cover 1 to 2 days of power in a general household. An electric power management system that makes it possible to supply electric power stored in a battery of an electric vehicle to a house is disclosed in, for example, Patent Document 2 below.

  Patent Document 2 discloses an energy management system that manages electric energy exchanged between a first energy-related system (for example, a house) and a second energy-related system (for example, an electric vehicle) that is a moving body. Is disclosed. The energy management system of Patent Document 2 acquires power consumption information in the first energy-related system, and before the first energy-related system and the second energy-related system are connected based on the information. The electric energy supplied from the second energy related system to the first energy related system is generated and stored in the second energy related system.

JP 2006-331405 A JP 2010-252625 A

  In the system of Patent Document 1, only charging of a battery installed in a charging facility is managed, and management of a battery mounted on an electric vehicle is not performed.

  Moreover, in the energy management system disclosed in Patent Document 2, for example, electric power is generated and stored in an electric vehicle according to the electric energy consumed in the house, and the remaining amount of the battery is controlled. It can be connected to an electric appliance (Charge / Discharge Power Conditioner (PCS)). However, in Patent Document 2, the means for controlling the remaining amount of the battery of the electric vehicle is only regenerative charging means such as an alternator and a regenerative motor. For this reason, it is not considered to level the power demand by charging surplus power to the battery of the electric vehicle when there is an excessive power supply due to the large-scale introduction of renewable energy such as solar power generation and wind power generation. . Therefore, there is a concern that it becomes difficult to effectively implement power management, such as when the power supply is excessive, the power system becomes unstable, or the operation of the solar power generation system needs to be stopped.

  The present invention has been made to solve the above-described problems. Before the electric vehicle is connected to the charge / discharge PCS, the free capacity of the battery of the electric vehicle is controlled, and the electric power when the power is excessively supplied. It aims at providing the battery charging / discharging system which can improve the contribution of the battery of the electric vehicle in demand leveling.

  The battery charging / discharging system according to the present invention has an electric vehicle equipped with a battery, a charging / discharging PCS (Power Conditioning System) for charging / discharging the battery, and a charging / discharging plan for the battery. A power management system that controls the operation of the charge / discharge PCS, the electric vehicle and the power management system, and the charge / discharge plan obtained from the power management system and the battery obtained from the electric vehicle. And an information management device that transmits a battery free capacity increase instruction for increasing the battery free capacity to the electric vehicle based on the remaining amount, and the electric vehicle receives the battery empty from the information management device. Based on a capacity increase instruction, the electric vehicle is configured to promote a decrease in the remaining battery level. A vehicle power management device for controlling the vehicle.

  According to the battery charge / discharge system of the present invention, the battery capacity of the battery can be increased as needed before the electric vehicle is connected to the charge / discharge PCS. It becomes possible to carry out leveling of power demand more effectively.

It is a block diagram which shows the whole structure of the battery charging / discharging system which concerns on embodiment of this invention. It is a flowchart which shows operation | movement of the electric power management system which concerns on embodiment of this invention. It is a flowchart which shows operation | movement of the EV information management apparatus which concerns on embodiment of this invention. It is a flowchart which shows operation | movement of the vehicle power management apparatus which concerns on embodiment of this invention.

<Configuration of battery charge / discharge system>
FIG. 1 is a block diagram showing an overall configuration of a battery charge / discharge system 1 according to an embodiment of the present invention. The battery charge / discharge system 1 is a smart grid power network including a plurality of power management systems 10.

  Each power management system 10 includes power generation by a photovoltaic power generation system 12 (PV), charge / discharge of power using the storage battery 13, power demand by the load device 14, and an electric vehicle 20 (electric vehicle) connected to the charge / discharge PCS 11. By managing the charging / discharging of the battery 21, the power demand leveling process is performed.

  It is effective to perform the power demand leveling process by the power management system 10 in anticipation of the power generation amount by the solar power generation system 12 and the power demand by the load device 14. The power management system 10 can be connected to a weather information server 42 that distributes weather information through the Internet 40, and predicts the amount of power generated by the solar power generation system 12 based on the predicted amount of solar radiation and temperature acquired from the weather information server 42. can do. Further, the power management system 10 can predict the power demand by the load device 14 from the past operation history (power consumption data) of the load device 14 and the operation schedule of the load device 14 set by the user.

  The power management system 10 also manages charging / discharging of the battery 21 of the electric vehicle 20 connected to the charging / discharging PCS 11, and the battery 21 of the electric vehicle 20 together with the storage battery 13 is used as a buffer for leveling power demand. Can do.

  The electric vehicle 20 includes a battery 21, a motor 22, a motor control device 23, an auxiliary machine 24, an information communication device 25, a display 26, a vehicle power management device 27, and a hydraulic brake control device 28. The motor 22 is for driving the electric vehicle 20 and generating regenerative power, and its operation is controlled by the motor control device 23. The auxiliary machine 24 is an electrical component other than the motor 22 and is, for example, a power steering device, an air conditioner, a lighting device, or various electronic control units. Electric power necessary for the operation of the motor 22 and the auxiliary machine 24 is supplied from the battery 21.

  The information communication device 25 can be connected to the Internet 40 by wireless communication via the base station 41, and transmits and receives signals and information to and from the EV information management device 30. From the electric vehicle 20 to the EV information management device 30, information such as its own location information obtained by receiving radio waves from the GPS satellite 45, the total capacity of the in-vehicle battery 21, the remaining amount, and the amount of power that can be charged and discharged. Is sent. An instruction (battery free capacity increase instruction) for increasing the free capacity of the battery 21 (the difference between the total capacity and the remaining capacity of the battery 21, that is, the chargeable capacity) is transmitted from the EV information management apparatus 30 to the electric vehicle 20. Is done.

  The display device 26 is information providing means for a user (driver) of the electric vehicle 20, for example, a recommended travel route of the electric vehicle 20, and guidance information to the (vacant) charge / discharge PCS 11 to which the electric vehicle 20 can be connected. And the like.

  The vehicle power management device 27 has a function of managing power consumption in the electric vehicle 20. The vehicle power management device 27 controls the operation of the motor 22 and the auxiliary device 24 based on the instruction to increase the available battery capacity received from the EV information management device 30, and the user consumes more power using the display 26. The free capacity of the battery 21 of the electric vehicle 20 is increased by guiding the route. Accordingly, the electric vehicle 20 can arrive at the location of the charge / discharge PCS 11 in a state where the free capacity of the battery 21 necessary for leveling the power demand is secured. The above-mentioned “route where the power consumption increases” may be simply a longer travel distance, but the road gradient (up and down) or the weather information server 42 distributes so that the actual travel environment is reflected. It is preferable to calculate in consideration of weather information (temperature, wind direction, etc.) to be performed, traffic information (congestion, construction, traffic signal information, etc.) distributed by the traffic information server 43, and the like.

  The hydraulic brake control device 28 has a function of adjusting the braking force of the hydraulic brake by controlling the hydraulic pressure of a hydraulic brake (not shown) of the electric vehicle 20.

  The electric vehicle 20 is not limited to an electric motor alone but may be a plug-in hybrid vehicle using a motor and a gasoline engine in combination.

  The battery charge / discharge system 1 includes a user terminal 44 that can be used by a user of the electric vehicle 20. The user of the electric vehicle 20 uses the user terminal 44 to obtain the usage schedule of the electric vehicle 20, the usage schedule of the charge / discharge PCS 11 (charge schedule of the battery 21), the desired value of the remaining amount of the battery 21 at the next departure, and the like. The information can be transmitted to the EV information management apparatus 30 through the Internet 40.

  The power management system 10 acquires information such as a schedule for the electric vehicle 20 to be connected to the charge / discharge PCS 11 and the remaining amount of the battery 21 from the EV information management device 30, and stores the storage battery 13 and the electricity connected to the charge / discharge PCS 11. A charging / discharging plan for the battery 21 of the automobile 20 is made, and electric power demand is leveled according to the plan. In addition, the power management system 10 can transmit a charge / discharge plan for the battery 21 of the electric vehicle 20 to the EV information management device 30.

  The EV information management device 30 includes a charge / discharge plan for the battery 21 of the electric vehicle 20 planned by the power management system 10, a vacancy status of the charge / discharge PCS 11, position information of the electric vehicle 20, a remaining amount and free capacity of the battery 21, weather The weather information distributed by the information server 42, the traffic information distributed by the traffic information server 43, the usage schedule of the electric vehicle 20 registered in the user terminal 44 and the usage schedule of the charge / discharge PCS 11 are acquired via the Internet 40 and managed. Save in the database 31 (management DB). The information on the free capacity of the battery 21 may be transmitted to the EV information management device 30 by the vehicle power management device 27 of the electric vehicle 20, or the EV information management device 30 subtracts the remaining amount from the total capacity of the battery 21. May be calculated.

  Further, the EV information management device 30 predicts the remaining amount of the battery 21 when the electric vehicle 20 is connected to the charge / discharge PCS 11 (when it arrives at the location of the charge / discharge PCS 11) based on the information stored in the management database 31. A value is calculated, and the value is subtracted from the total capacity of the battery 21 to obtain an expected value of the free capacity, and it is determined whether or not the free capacity necessary for the power demand leveling process is secured in the battery 21. If the expected value of the free capacity of the battery 21 is insufficient with respect to the amount of power that the battery 21 wants to charge for power leveling processing (ie, the surplus amount of power), the EV information management device 30 A battery free capacity increase instruction is transmitted to the automobile 20. The electric vehicle 20 that has received the instruction to increase the battery free capacity promotes a decrease in the remaining amount of the battery 21 by increasing its own power consumption or suppressing regenerative power, and increases its free capacity.

  Further, the EV information management device 30 transmits information on the chargeable / dischargeable PCS 11 that can be connected to the user terminal 44 or the information communication device 25 of the electric vehicle 20. The user of the electric vehicle 20 connects the electric vehicle 20 to the charge / discharge PCS 11 guided through the user terminal 44 or the display 26 of the electric vehicle 20, and controls the battery 21 of the electric vehicle 20 under the control of the power management system 10. Charge and discharge.

  When the electric vehicle 20 is connected to the charge / discharge PCS 11, the power management system 10 charges and discharges the battery 21 of the electric vehicle 20 and contributes to leveling of power demand. For example, when the output of the solar power generation system 12 is larger than the power consumption of the load device 14, the surplus power is charged in the battery 21. This operation also has an effect of preventing reverse power flow and instability of the power system. Further, when the output of the solar power generation system 12 is insufficient with respect to the power consumption of the load device 14, the battery 21 is discharged to supplement the power.

  When the power demand is leveled in this way, the peak power is lowered, so that the contract electricity charge can be reduced. Further, the power management system 10 charges the battery 21 so that the remaining amount of the battery 21 is equal to or greater than the desired value designated by the user by the next departure of the electric vehicle 20.

  When the electric vehicle 20 contributes to leveling the power demand of the power management system 10, the power management system 10 notifies the EV information management device 30 of information indicating this. When the EV information management device 30 detects that the electric vehicle 20 has contributed to power leveling, the EV information management device 30 provides services such as cashback and fee discount to the user of the electric vehicle 20 according to the degree of contribution. In this way, when a part of profits from power demand leveling is returned to the user, the user will actively contribute to leveling of power demand, so that the level of power demand can be further leveled. become. Charge management such as cashback and charge discount may be performed by installing a server (charge management server) separate from the EV information management apparatus 30.

<Operation of battery charge / discharge system>
FIG. 2 is a flowchart showing the operation of each power management system 10 in the battery charge / discharge system 1 according to the embodiment of the present invention. The operation of the power management system 10 will be described with reference to FIG.

  First, the power management system 10 acquires weather information necessary for the prediction of the amount of power generated by the solar power generation system 12, such as the amount of solar radiation and the predicted temperature, from the weather information server 42 (step S101). And based on the acquired weather information, the electric power generation amount in the solar power generation system 124 is estimated (step S102).

  Next, the power management system 10 predicts the power demand by the load device 14 (step S103). The power demand by the load device 14 can be predicted from the past power consumption data of the load device 14 or the operation schedule of the load device 14 set by the user, but the prediction method may be arbitrary.

  Subsequently, the power management system 10 acquires various types of information (vehicle information) regarding the electric vehicle 20 from the EV information management device 30 (step S104). The vehicle information acquired by the power management system 10 includes, for example, a use schedule of the charge / discharge PCS 11 by the electric vehicle 20, the current position of the electric vehicle 20, the total capacity, remaining amount and free capacity of the battery 21, and the power management system 10. Estimated time of arrival at the location of the charge / discharge PCS 11 to be managed and the remaining amount of the battery 21 at that time, the expected value of the chargeable / dischargeable electric energy, the time of the next departure and the desired value of the remaining amount of the battery 21 at that time, etc. Is included.

  Next, the power management system 10 confirms the current power supply / demand situation in the facilities managed by the power management system 10 (step S105). Specifically, the power generation amount of the solar power generation system 124, the power consumption of the load device 14, the power amount of the storage battery 13 that can be charged / discharged, and the like. If the EV information management device 30 is connected to the charge / discharge PCS 11, the vehicle number of the electric vehicle 20, the charge / discharge status of the battery 21, the remaining amount of the battery 21, the free capacity, and the chargeable / dischargeable power amount are confirmed. Is done.

  The power management system 10 equalizes the power demand based on the predicted power generation amount in the solar power generation system 124, the predicted power demand by the load device 14, various information on the electric vehicle 20, and the current power supply / demand situation. A charging / discharging plan for the storage battery 13 and the battery 21 of the electric vehicle 20 is made (step S106).

  The charge / discharge plan planned by the power management system 10 includes not only the charge / discharge plan for the battery 21 of the electric vehicle 20 actually connected to the charge / discharge PCS 11 but also the electric vehicle 20 to be connected to the charge / discharge PCS 11 from now on. The charging / discharging plan for the battery 21 is also included.

  Here, the storage battery 13 may be discharged preferentially over the battery 21 of the electric vehicle 20 with respect to a discharge plan for peak cut of power demand. In addition, regarding the charging plan when the power demand is low, the battery 21 of the electric vehicle 20 may be charged with priority over the storage battery 13. Thus, if the storage battery 13 is prioritized for discharging and the battery 21 of the electric vehicle 20 is prioritized for charging, a large remaining amount of the battery 21 of the electric vehicle 20 can be secured, for example, the departure time of the electric vehicle 20 It will be possible to respond when the time is earlier than planned.

  The electric power management system 10 will implement charge / discharge control of the battery 21 and the storage battery 13 of the electric vehicle 20 based on the charge / discharge plan (step S107). In addition, the power management system 10 transmits the planned charge / discharge plan and the current power supply / demand situation to the EV information management apparatus 30 (step S108).

  The power management system 10 repeatedly performs the above operation.

  As described above, the power management system 10 determines the remaining amount of the battery 21 and the amount of power that can be charged and discharged when the electric vehicle 20 is connected to the charge / discharge PCS 11 before the electric vehicle 20 is connected to the charge / discharge PCS 11. A charge / discharge plan is made in consideration of the predicted value, and the information is transmitted to the EV information management device 30.

  FIG. 3 is a flowchart showing the operation of the EV information management apparatus 30. First, the EV information management device 30 acquires vehicle information from the information communication device 25 of the electric vehicle 20 (step S201). The vehicle information acquired from the electric vehicle 20 includes the total capacity, remaining amount and free capacity of the battery 21, power consumption of the motor 22, power consumption of the auxiliary machine 24, position information of the electric vehicle 20, and the like.

  Next, the EV information management device 30 also acquires vehicle information from the user terminal 44 of the user of the electric vehicle 20 (step S202). The vehicle information acquired from the user terminal 44 includes, for example, the arrival time at the location of the charge / discharge PCS 11 and the scheduled departure time, the desired value of the remaining amount of the battery 21 at the time of departure, and the management by the power management system 10. The amount of power that can be charged / discharged by the battery 21, the vehicle number of the electric vehicle 20, and user attribute information are included.

  Further, the EV information management device 30 acquires the planned travel route of the electric vehicle 20 and traffic information around the charge / discharge PCS 11 from the traffic information server 43 (step S203). The traffic information includes traffic jam information, the number of traffic lights and lighting conditions of blue and red, construction information, accident information, and the like.

  Next, the EV information management apparatus 30 acquires the charge / discharge plan and the current power supply / demand situation from the power management system 10 (step S204). This step S204 corresponds to step S108 in FIG. As described above, the charge / discharge plan prepared by the power management system 10 includes a charge / discharge plan for the battery 21 of the electric vehicle 20 to be connected to the charge / discharge PCS 11 in the future. That is, in the charge / discharge plan, when the electric vehicle 20 is connected to the charge / discharge PCS 11, the remaining amount and free capacity of the battery 21 required, and the identification number of the charge / discharge PCS 11 that the electric vehicle 20 desires to connect to. Information such as location information is also included.

  Next, the EV information management device 30 calculates an expected value of the free capacity of the battery 21 when the electric vehicle 20 arrives at the location of the charge / discharge PCS 11 for the electric vehicle 20 scheduled to be connected to the charge / discharge PCS 11. (Step S205). Specifically, first, from the position information of the electric vehicle 20 and the position information of the charge / discharge PCS 11 to which the electric vehicle 20 is connected, the electric vehicle 20 is consumed by the motor 22 or the auxiliary device 24 until the electric vehicle 20 arrives at the location of the charge / discharge PCS 11. The calculated electric power is calculated and subtracted from the current remaining amount of the battery 21 to obtain an expected value of the remaining amount of the battery 21 when arriving at the location of the charge / discharge PCS 11. Then, by subtracting the estimated value of the remaining amount from the total capacity of the battery 21, the estimated value of the free capacity of the battery 21 is obtained.

  Then, the EV information management device 30 calculates the free capacity of the battery 21 required when the electric vehicle 20 is connected to the charge / discharge PCS 11 in the charge / discharge plan (hereinafter referred to as “required battery free capacity”) in step S205. The predicted value of the free capacity of the battery 21 when the electric vehicle 20 arrives at the place of the charge / discharge PCS 11 (hereinafter, “expected battery free capacity”) is compared (step S206).

  At this time, if the required battery free capacity is equal to or less than the expected battery free capacity (YES in step S206), the charge / discharge plan formulated by the power management system 10 is executed without increasing the free capacity of the battery 21 of the electric vehicle 20. Is possible. In this case, since it is not necessary to increase the free capacity of the battery 21 of the electric vehicle 20, the value of the amount (battery free capacity increase amount) for increasing the free capacity of the battery 21 with respect to the expected battery free capacity is set to “0”. Setting is made (step S207).

  On the other hand, if the required battery free capacity is larger than the expected battery free capacity (NO in step S206), the power consumption in the electric vehicle 20 must be increased or the regenerative power should be suppressed to secure more free capacity in the battery 21. If this is the case, the charge / discharge treatment cannot be performed as planned. In this case, the EV information management device 30 performs a process for promoting a decrease in the remaining amount of the battery 21 as follows.

  First, the EV information management device 30 calculates the amount of increase in battery free capacity (step S208). The amount of increase in battery free capacity may be, for example, the difference between the required battery free capacity and the expected battery free capacity.

  Next, a means for promoting a decrease in the remaining amount of the battery 21 (battery remaining amount reducing means) is determined by a predetermined calculation (step S209). Select one or more of “Motor power consumption increase”, “Motor regenerative power suppression”, “Hydraulic brake increase”, “Auxiliary power output increase”, and “Power consumption increase route display” as battery remaining power reduction means Is done.

  “Motor power consumption increase” is a means for reducing the remaining battery power by using the motor control device 23 to increase the power consumption of the running motor 22. Specifically, the driving torque map with respect to the accelerator opening and the vehicle speed of the motor control device 23 may be changed, and it may be set to increase the target driving torque at a certain ratio with respect to the current motor output value. It is done.

  “Motor regenerative power suppression” is a means for reducing the remaining amount of battery by suppressing regenerative power generated by the motor 22 that is running using the motor control device 23. Specifically, the regenerative torque map with respect to the accelerator opening and the vehicle speed of the motor control device 23 may be changed, and a setting to suppress the target regenerative torque at a certain ratio with respect to the current motor output value is considered. It is done.

  “Hydraulic brake increase” is means for reducing the remaining battery level by increasing the hydraulic pressure of the hydraulic brake and increasing the braking force of the hydraulic brake. When the braking force of the hydraulic brake is increased, the use of the regenerative brake by the motor 22 is relatively reduced, so that the effect of suppressing the regenerative power can be obtained in the same manner as the “motor regenerative power suppression” described above. Further, by coordinating “increase in hydraulic brake” and “suppress motor regenerative power”, it is possible to suppress regenerative power while maintaining a constant deceleration with respect to the brake opening. Thereby, reduction in the remaining amount of the battery 21 can be promoted without affecting the driving feeling of the driver.

  “Auxiliary machine output increase” is a means for reducing the remaining battery level by suppressing the output of the auxiliary machine 24. For example, in the case of using an air conditioner that is one of the auxiliary machines 24, a method of setting the set temperature high during heating and low during cooling, a method of increasing the output of the air conditioner at a certain ratio, and heating and cooling of the air conditioner. A method of driving simultaneously or alternately may be considered.

  The “power consumption increase route display” is a means for reducing the remaining amount of the battery by using the indicator 26 to guide the driver of the electric vehicle 20 along the route in which the power consumption of the motor 22 or the auxiliary device 24 increases. Routes that increase power consumption include, for example, routes with a lot of traffic light, routes with a lot of red traffic lights, routes with a lot of upslopes, routes with an outside temperature that requires a strong air conditioner output, routes with heavy traffic and construction, headwinds, etc. There are many routes.

  The method for determining the battery remaining amount reducing means may be arbitrary. For example, when the battery free capacity increase amount is small, a means having a small influence on the driver's driving feeling and comfort is selected, and when the battery free capacity increase amount is large, the remaining amount of the battery 21 is reduced. It is conceivable to select a higher method.

  Further, the battery remaining amount reducing means to be selected may be one or plural. When a plurality of means are selected, the effect of reducing the remaining amount of the battery 21 can be dispersed without concentrating it on a specific device, so that the battery 21 does not drastically reduce the driving feeling and comfort of the driver. The remaining amount can be reduced. When a plurality of battery remaining amount reducing means are selected, each of them is caused to share a battery free capacity increase amount at a predetermined ratio.

  In addition, a switch for setting whether or not to allow an increase in the free capacity of the battery 21 is installed in the electric car 20 so that the intention of the user of the electric car 20 can be respected, and the free capacity of the battery 21 is set only when the user desires. Control may be performed.

  Returning to FIG. 3, when the battery remaining amount reducing means and the battery free capacity increase amount are determined, the EV information management apparatus 30 issues a battery free capacity increase instruction including information on the determined battery remaining amount reducing means and the battery free capacity increase amount. Then, the information is transmitted to the information communication device 25 of the electric vehicle 20 (step S210). At this time, the identification number of the charge / discharge PCS 11 to which the electric vehicle 20 is to be connected is also transmitted to the information communication device 25.

  The EV information management device 30 repeatedly executes the above operation.

  When the electric vehicle 20 receives the battery free capacity increase instruction (including the battery remaining amount reducing means and the battery free capacity increase amount) transmitted from the EV information management device 30, the vehicle power management device 27 of the electric vehicle 20 Based on the battery free capacity increase instruction, the operation of the electric vehicle 20 is controlled so that the decrease in the remaining amount of the battery 21 is promoted.

  In addition, even if the electric vehicle 20 performs the operation according to the battery free capacity increase instruction from the EV information management device 30, the free capacity (required battery free capacity) of the battery 21 required by the power management system 10 cannot be secured. May notify the power management system 10 from the electric vehicle 20, or may be configured to perform arbitration between the electric vehicle 20 and the power management system 10. With such a configuration, when an instruction to increase the battery capacity that cannot be achieved reaches the electric vehicle 20, the power management system 10 can change the charge / discharge plan.

  FIG. 4 is a flowchart showing the operation of the vehicle power management device 27 of the electric vehicle 20. First, the vehicle power management device 27 detects the accelerator opening, the brake opening, the motor current, the motor voltage, the vehicle speed, the remaining amount and the free capacity of the battery 21, the battery voltage, the battery current, Information (sensor information) such as battery temperature, auxiliary machine output, air conditioner set temperature, vehicle interior temperature, etc. is acquired (step S301).

  Next, the vehicle power management device 27 obtains from the EV information management device 30 an instruction to increase the available battery capacity (including the remaining battery capacity reduction means and the increased battery capacity) and the identification number of the charge / discharge PCS 11 to be connected. (Step S302). This step S302 corresponds to step S210 in FIG.

  The vehicle power management device 27 can select any one of “remaining battery power reduction”, “suppress motor regenerative power”, “increase hydraulic brake”, “increased auxiliary machine output”, and “display increased power consumption route” as means for reducing the remaining battery power. Check if it is selected.

  If “increased motor power consumption” is selected (YES in step S303), a control instruction for increasing the power consumption of the motor 22 is transmitted to the motor control device 23 (step S304). If “increased motor power consumption” is not selected (NO in step S303), a normal drive control instruction for the motor 22 corresponding to the accelerator opening, the brake opening, the vehicle speed, and the remaining amount of the battery 21 is given to the motor control device. 23 (step S305).

  If “increased motor regenerative power” is selected (YES in step S306), a control instruction for suppressing the regenerative power of the motor 22 is transmitted to the motor control device 23 (step S307). If “increased motor power consumption” is not selected (NO in step S306), a normal regenerative control instruction for the motor 22 according to the accelerator opening, the brake opening, the vehicle speed, and the remaining amount of the battery 21 is given to the motor control device. 23 (step S308).

  If “increase hydraulic brake” is selected (YES in step S309), a control instruction to increase the hydraulic pressure of the hydraulic brake is transmitted to the hydraulic brake control device 22 (step S310). If “Hydraulic brake increase” is not selected (YES in Step S309), the hydraulic brake control device 22 issues a normal control instruction for the hydraulic brake according to the accelerator opening, the brake opening, the vehicle speed, and the remaining amount of the battery 21. (Step S311).

  If “increased auxiliary machine output” is selected (YES in step S312), a control instruction for increasing the power consumption of auxiliary machine 24 is transmitted to auxiliary machine 24 (step S313). If “increased auxiliary machine output” is not selected (NO in step S312), a normal control instruction corresponding to the vehicle interior temperature and the remaining amount of battery 21 is transmitted to auxiliary machine 24 (step S314).

  If “power consumption increase route display” is selected (YES in step S315), the route guidance for increasing power consumption is displayed on the display 26 (step S316). If “display of increased power consumption route” is not selected (NO in step S315), for example, normal route guidance that places importance on the required time, travel distance, toll, etc. is displayed on the display 26 (step S317).

  Next, the vehicle power management device 27 sends the vehicle information such as the remaining amount and free capacity of the battery 21, the power consumption and regenerative power of the motor 22, the power consumption of auxiliary equipment, and vehicle sensor information through the information communication device 25 to the EV information. It transmits to the management apparatus 30 (step S318).

  The vehicle power management device 27 repeatedly executes the above operation.

  Thus, in the battery charge / discharge system 1 according to the present embodiment, the vehicle power management device 27 of the electric vehicle 20 uses the power consumption suppression control instruction received from the EV information management device 30 in the electric vehicle 20. The power consumption is increased or the regenerative power is suppressed, and the free capacity of the battery 21 is increased. Thereby, the free capacity of the battery 21 when the electric vehicle 20 is connected to the charge / discharge PCS 11 can be largely secured as necessary. Therefore, the power management system 10 can effectively contribute the battery 21 to the power demand leveling process, and the peak cut performance of the power demand is also improved. In addition, by charging the battery 21 with surplus power when the power supply is excessive, reverse power flow can be prevented and instability of the power system can be prevented.

  Further, the battery remaining amount reducing means of the electric vehicle 20 can be selected from a plurality of “motor power consumption increase”, “motor regenerative power suppression”, “hydraulic brake increase”, “auxiliary output increase”, and “power consumption increase route display”. Since the available capacity of the battery 21 can be controlled by combining them, the influence on the driving feeling and comfort of the driver can be reduced.

  In the present invention, the embodiments can be appropriately modified and omitted within the scope of the invention.

  DESCRIPTION OF SYMBOLS 1 Battery charging / discharging system, 10 Electric power management system, 11 Charging / discharging PCS, 12 Solar power generation system, 13 Storage battery, 14 Load apparatus, 20 Electric vehicle, 21 Battery, 22 Motor, 23 Motor control apparatus, 24 Auxiliary machine, 25 Information Communication device, 26 indicator, 27 vehicle power management device, 30 EV information management device, 31 management database, 40 Internet, 41 base station, 42 weather information server, 43 traffic information server, 44 user terminal, 45 GPS satellite.

Claims (10)

An electric vehicle equipped with a battery;
Charging / discharging PCS (Power Conditioning System) for charging and discharging the battery;
An electric power management system that formulates a charge / discharge plan for the battery and controls the operation of the charge / discharge PCS based on the charge / discharge plan;
Based on the charge / discharge plan acquired from the power management system and the remaining amount of the battery acquired from the electric vehicle, the battery of the electric vehicle can be communicated with the electric vehicle and the power management system. An information management device for transmitting a battery free capacity increase instruction for increasing the free capacity,
The electric vehicle is
A battery charge / discharge system comprising a vehicle power management device that controls the electric vehicle so as to promote a decrease in the remaining amount of the battery based on an instruction to increase the available battery capacity from the information management device. The battery charge / discharge system according to claim 1, wherein the vehicle power management device controls the electric vehicle based on the battery free capacity increase instruction so that power consumption required for traveling of the electric vehicle increases. The battery charge / discharge system according to claim 2, wherein the vehicle power management device increases a drive output characteristic of a motor of the electric vehicle based on the battery free capacity increase instruction. The electric vehicle further includes a display for displaying a route guidance.
4. The battery charging according to claim 2, wherein the vehicle power management device displays, on the display, guidance on a travel route in which power consumption of the motor of the electric vehicle increases based on the battery free capacity increase instruction. Discharge system. The vehicle power management device according to any one of claims 1 to 4, wherein the vehicle power management device controls the electric vehicle so that regenerative electric power due to traveling of the electric vehicle is reduced based on the instruction to increase the available battery capacity. Battery charging and discharging system. The battery charge / discharge system according to claim 5, wherein the vehicle power management device lowers a regenerative output characteristic of a motor of the electric vehicle based on the battery free capacity increase instruction. The electric vehicle further includes a display for displaying a route guidance.
The battery according to claim 5 or 6, wherein the vehicle power management device causes the display to display a guide for a travel route in which regenerative power of the motor of the electric vehicle is reduced based on the battery free capacity increase instruction. Charge / discharge system. The electric vehicle is
Hydraulic brakes,
A hydraulic brake control device for controlling the hydraulic pressure of the hydraulic brake;
The battery charging / discharging system according to any one of claims 1 to 7, wherein the vehicle power management device uses the hydraulic brake control device to increase the hydraulic pressure of the hydraulic brake based on the battery free capacity increase instruction. . The electric vehicle further includes an auxiliary machine to which the battery power is supplied,
The battery charging / discharging according to any one of claims 1 to 8, wherein the vehicle power management device controls the auxiliary device so as to increase power consumption of the auxiliary device based on the battery free capacity increase instruction. system. The electric vehicle further includes a display for displaying a route guidance.
The battery charging / discharging system according to claim 9, wherein the vehicle power management device causes the display to display a guide for a travel route in which the power consumption of the auxiliary device increases based on the battery free capacity increase instruction.

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