JP2013211981A - Charge/discharge system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a vehicle from being stolen, and return a state of a charge of a rechargeable battery to a required charge state at a time when a user uses the vehicle.SOLUTION: A calculation/determination part calculates a charging start time (TS1) at which a charging of a battery is started. The calculation/determination part also compares a total time period of a discharge time period (T1) and a charge time period (T2) with a completion time period (T3) in which the charging is completed at a charging completion time (TE2). A charge/discharge control part starts a discharging when the total time period is larger than the completion time period, and starts a charging when the charging start time comes.

Description

  The present invention relates to a charge / discharge system for charging / discharging a storage battery mounted on a vehicle.

  A charging / discharging system that charges and discharges a storage battery mounted on a vehicle such as an EV (Electric Vehicle) or a PHV (Plug in Hybrid Vehicle) is disclosed in Patent Document 1, for example. In the charge / discharge system of Patent Document 1, in consideration of the fact that the life of the storage battery is shortened when the storage state of the storage battery mounted on the vehicle is left for a long time in a state of being fully charged or close to full charge, Is discharging.

JP 2009-5450 A

  By the way, in vehicles such as EVs and PHVs that run using the power of the storage battery as a drive source, the discharge technique of the storage battery as disclosed in Patent Document 1 can be applied as a technique for suppressing theft of the vehicle. is there. However, EVs, PHVs, and other vehicles that travel using the power of the storage battery as a drive source will shorten the travel distance if the amount of charge is reduced by discharging the power of the storage battery, which will affect the travel performance of the vehicle. . For this reason, when discharging the storage battery, it is necessary to return the charged state of the storage battery to a desired charged state when the user uses the vehicle.

  This invention was made paying attention to the problem which exists in such a prior art, and the objective is suppressing theft of a vehicle, and the charge condition of a storage battery at the time of a user using a vehicle. Is to provide a charge / discharge system for returning the battery to the required charge state.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a charge / discharge system that charges and discharges a storage battery mounted on a vehicle, and calculates a start time for starting charging of the storage battery. And a determination unit that determines a margin until the charging start time, and the determination unit determines that there is a margin, the battery is discharged and the storage battery is brought into a required charging state by the arrival of the charging start time. It is summarized that the charging / discharging control unit is charged.

  According to this, since the storage battery is discharged and the amount of electric power stored in the storage battery is reduced until the charging start time arrives, it is possible to limit the travel of the vehicle. That is, theft of the vehicle can be suppressed. On the other hand, if the charge start time has arrived, the storage battery is charged to the required charge state. In the present invention, the determination unit determines that the battery is charged after the discharge is started before the charging start time, so that the battery is charged at the time when the user uses the vehicle. Can be returned to.

  According to a second aspect of the present invention, in the charge / discharge system according to the first aspect, the charge / discharge control unit, when the determination unit determines that there is no tolerance, does not discharge the storage battery and the charge start time. The gist is to charge the storage battery by the arrival of.

  According to this, according to the determination by the determination unit, if there is no margin until the charging start time, the battery is charged to the requested charging state without discharging and when the charging start time arrives. For this reason, at the time when the user uses the vehicle, the state of charge of the storage battery can be changed to the required state of charge.

  Invention of Claim 3 is provided with the setting part which sets the charge completion time which makes the charge condition of the said storage battery the request | requirement charge state in the charging / discharging system of Claim 1 or Claim 2, The said start time calculation The gist is to calculate the charging start time based on the time required to charge the storage battery in a predetermined charging state to the required charging state at the time when the charging completion time arrives.

  According to this, since the charging start time is calculated from the set charging completion time, the user only has to set the time at which the vehicle is to be used without considering the time required for charging. Can be achieved. That is, when the user sets the charging start time, it must be set while considering the time required for charging, and the setting process becomes complicated.

  According to a fourth aspect of the present invention, in the charge / discharge system according to any one of the first to third aspects of the present invention, a setting unit that sets a charge completion time for setting the charge state of the storage battery to the required charge state. And the determination unit adds together the time required to discharge the storage battery to a predetermined charge state and the time required for the discharged storage battery to charge to the required charge state when the charge completion time arrives. The gist is to determine that there is a margin until the charging start time when the time until the charging completion time is longer than that.

  According to this, the charged state of the storage battery can be reliably discharged to the predetermined charged state. For this reason, driving | running | working of a vehicle can be restrict | limited more reliably and theft of a vehicle can be suppressed. When the charging start time arrives, the storage battery is charged from the predetermined charging state to the required charging state, so that the charging state of the storage battery can be returned to the required charging state when the user uses the vehicle.

  According to a fifth aspect of the present invention, in the charge / discharge system according to the third or fourth aspect, the predetermined charge state is a charge amount exceeding 0% as a charge state of the storage battery, The gist is that the lower limit amount is set. According to this, since the discharge is not performed until the charged amount of the storage battery becomes 0%, it is possible to suppress the deterioration of the battery life.

  A sixth aspect of the present invention is the charge / discharge system according to any one of the first to fifth aspects, further comprising a charging device that supplies electric power transmitted from an electric power system to the vehicle, and the storage battery. The power discharged from the battery is charged in a power storage device different from the storage battery connected to the charging device, transmitted to a power consuming device other than the vehicle to be discharged, or transmitted to the power system. Is the gist. According to this, the discharged electric power can be reused. Therefore, an environment-friendly system can be constructed without wasting electric energy.

  ADVANTAGE OF THE INVENTION According to this invention, the charging state of a storage battery can be returned to a request | requirement charging state at the time of a user using a vehicle, suppressing theft of a vehicle.

The block diagram which shows the outline of a charging / discharging system. The graph which shows the change of charge amount. The flowchart which shows a discharge process. The flowchart which shows a charge process. Explanatory drawing explaining another example.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, a vehicle 11 such as an EV or a PHV is equipped with a battery 11 as a storage battery that stores power supplied to an electric motor (motor) (not shown) serving as a prime mover of the vehicle 10. In addition, the vehicle 10 is equipped with a charge / discharge control unit 12 that controls charging / discharging of the battery 11 and a setting unit 13 that sets various types of information necessary for executing the charge / discharge control. In the setting unit 13, a charging completion time for completing charging of the battery 11 and discharge permission information for permitting discharging from the battery 11 are set by a human operation such as a user of the vehicle 10. In the present embodiment, the charging completion time is set as a time for setting the charging state of the battery 11 to the fully charged state as the required charging state.

  The charging stand 14 is equipped with a calculation / determination unit 15 that performs various calculations and various determinations, and a charge / discharge control unit 16 that controls charging / discharging of the vehicle 10 connected via the charge / discharge plug P. . The charging / discharging plug P connecting the vehicle 10 and the charging stand 14 includes a power line for transmitting power and a signal line for transmitting / receiving information.

  The charging stand 14 is connected to the power system 17. The charging / discharging control unit 16 of the charging stand 14 transmits the power transmitted from the power system 17 during charging to the charging / discharging control unit 12 of the vehicle 10 via the charging / discharging plug P. Then, the charge / discharge control unit 12 of the vehicle 10 charges the battery 11 with the received power.

  The charging stand 14 is connected to a power storage device 18 installed outside. The charging / discharging control unit 16 of the charging stand 14 charges the power storage device 18 with power transmitted from the vehicle 10 during discharging. In addition, the charging / discharging control part 12 of the vehicle 10 transmits the electric power of the battery 11 to the charging / discharging control part 16 of the charging stand 14 through the charging / discharging plug P at the time of discharge.

Hereinafter, a discharging process for discharging from the battery 11 and a charging process for charging the battery 11 will be described with reference to FIGS. 3 and 4.
First, the discharge process will be described with reference to FIG.

  The calculation / determination unit 15 of the charging station 14 determines whether or not a discharge permission signal has been received from the vehicle 10 (step S10). The discharge permission signal is transmitted from the setting unit 13 when the discharge permission information is set in the setting unit 13 of the vehicle 10 and the vehicle 10 and the charging stand 14 are connected by the charge / discharge plug P. For this reason, when the negative determination is made in step S10, the vehicle 10 and the charging stand 14 are not connected, and the discharge permission information is not set in the setting unit 13 of the vehicle 10. If the operation / determination unit 15 makes a negative determination in step S10, the process of step S10 is repeated.

  On the other hand, if affirmative determination is made in step S10, the calculation / determination unit 15 acquires the charging completion time from the vehicle 10 (step S11). The charging completion time is set by the setting unit 13 of the vehicle 10 and is transmitted from the setting unit 13 when the vehicle 10 and the charging stand 14 are connected by the charge / discharge plug P.

  Next, the calculation / determination unit 15 calculates a charging start time for completing the charging of the battery 11 by the charging completion time based on the charging completion time acquired in step S11 (step S12). In step S12, the calculation / determination unit 15 sets the charge state of the battery 11 to a predetermined lower limit, and based on the time required to charge from the charge state to the fully charged state as the required charge state, The charge start time is calculated. For example, the calculation / determination unit 15 calculates 11:00 pm as the charging start time when the charging completion time is 7:00 am and the time required for charging to a fully charged state is 8 hours. The lower limit amount is set to an amount in which the charge amount exceeds 0% as the state of charge, and is set to an amount that should be kept to a minimum (amount that can be optimally maintained) when the life of the battery 11 is taken into consideration. The fully charged state does not indicate 100% as the charge amount, but is set to a charge amount of less than 100%, such as 90%. The state of charge is indicated by the SOC, and represents the amount of charge (the amount of power) that is charged with respect to the capacity of the battery 11 as a ratio. In the present embodiment, the calculation / determination unit 15 performs the process of step S12 to obtain the time required to charge the battery 11 in a predetermined charging state to the required charging state when the charging completion time arrives. It functions as a start time calculation unit that calculates the charge start time.

  Next, the calculation / determination unit 15 determines whether or not to discharge the battery 11 based on the charging start time calculated in Step S12 (Step S13). In step S <b> 13, the calculation / determination unit 15 determines the tolerance to the charging start time and affirmatively determines step S <b> 13 when there is a tolerance, and negatively determines step S <b> 13 when there is no tolerance. The presence / absence determination of tolerance in step S13 is performed as described below. First, the calculation / determination unit 15 acquires the state of charge (SOC) of the battery 11 from the vehicle 10 and discharge time required for discharging from the acquired state of charge to the state of charge that is the lower limit amount (shown in FIG. 2). T1) is calculated. Next, the calculation / determination unit 15 calculates a charging time (T2 shown in FIG. 2) until the charging state becomes the required charging state (full charging state) from the lower limit amount. This charging time is calculated by the difference between the charging completion time and the charging start time. Then, the calculation / determination unit 15 calculates a total time obtained by adding the discharge time and the charge time, and compares the total time with a completion time (T3 shown in FIG. 2) until the charge completion time. The completion time until the charging completion time is calculated from the difference between the current time and the charging completion time by obtaining the current time from the built-in timer.

  If the completion time is longer than the total time (discharge time + charge time), the calculation / determination unit 15 makes a positive determination in step S13 that there is a margin. In this case, since the battery 11 can be discharged to the lower limit amount and charged to the fully charged state during the completion time, it is determined that there is a margin in this embodiment. For example, when the current time is 5 pm and the charge completion time is 7:00 am, the calculation / determination unit 15 has a discharge time of 3 hours and a charge time of 8 hours, the completion time (14 hours) ) And the total time (11 hours), it is determined that there is a margin.

  On the other hand, when the completion time is shorter than the total time (discharge time + charge time), the calculation / determination unit 15 makes a negative determination in step S13 as having no margin. In this case, since the battery 11 cannot be discharged to the lower limit amount and charged to the fully charged state during the completion time, it is determined that there is no margin in this embodiment.

  The process of step S13 is a process for preventing the discharge from starting when there is no room before the start of charging, such as when it is necessary to start charging immediately even if the discharge is started. That is, the discharge is not performed when the effect of the discharge is small. If the operation / determination unit 15 makes a negative determination in step S <b> 13, the discharge process ends. On the other hand, if the operation / determination unit 15 makes a positive determination in step S13, the operation / determination unit 15 proceeds to step S14. In the present embodiment, the calculation / determination unit 15 functions as a determination unit that determines the tolerance to the charging start time by executing the process of step S13.

  In step S <b> 14, the calculation / determination unit 15 transmits a discharge start signal to the charge / discharge control unit 12 of the vehicle 10. The charging / discharging control part 12 of the vehicle 10 will start discharge of the battery 11, if a discharge start signal is input. That is, the charge / discharge control unit 12 discharges the battery 11 when the determination result of step S13 is affirmative. On the other hand, the charging / discharging control unit 16 of the charging stand 14 charges the power storage device 18 with the electric power transmitted when the charging / discharging control unit 12 of the vehicle 10 starts discharging. Then, after the start of discharging, the charge / discharge control unit 12 of the vehicle 10 monitors the state of charge (SOC) of the battery 11. And the charge / discharge control part 12 is discharged until the charge amount reaches | attains the predetermined lower limit amount as the charge condition of the battery 11. FIG.

  Thus, by discharging in the charging / discharging system of this embodiment, it becomes possible to restrict | limit driving | running | working of the vehicle 10 until the battery 11 is newly charged. That is, by reducing the state of charge of the battery 11 to the lower limit amount, the distance that the vehicle 10 can travel can be shortened. As a result, the theft of the vehicle 10 can be suppressed.

Next, the charging process will be described with reference to FIG.
The calculation / determination unit 15 of the charging station 14 determines whether or not the charging start time calculated in step S12 of the discharging process in FIG. 3 has arrived (step S20). If the determination is negative in step S20, the calculation / determination unit 15 repeats the process in step S20 until the charging start time comes. On the other hand, the arithmetic / determination unit 15 starts charging when the charging start time comes when the determination in step S20 is affirmative (step S21). In step S <b> 21, the calculation / determination unit 15 transmits a charge start signal to the charge / discharge control unit 12 of the vehicle 10. The charge / discharge control unit 12 of the vehicle 10 receives the charge start signal and transmits a charge permission signal to the calculation / determination unit 15 when the battery 11 can be charged. When the calculation / determination unit 15 receives the charge permission signal, the calculation / determination unit 15 starts charging by the charge / discharge control unit 16. Then, the charge / discharge control unit 16 transmits the power transmitted from the power system 17 to the charge / discharge control unit 12 of the vehicle 10 via the charge / discharge plug P. The charge / discharge control unit 12 of the vehicle 10 charges the battery 11 with the transmitted power.

  Next, the calculation / determination unit 15 determines whether or not to end the charging (step S22). In step S <b> 22, the calculation / determination unit 15 makes a positive determination in step S <b> 22 when a charge completion signal is received from the vehicle 10. On the other hand, when the calculation / determination unit 15 has not received a charge completion signal from the vehicle 10, the operation / determination unit 15 makes a negative determination in step S22 and repeats the process of step S22. When the battery 11 is fully charged, the charge / discharge control unit 12 of the vehicle 10 transmits a charge completion signal to the calculation / determination unit 15 of the vehicle 10. When the calculation / determination unit 15 receives the charge completion signal, the calculation / determination unit 15 ends the charging by the charge / discharge control unit 16. Then, the charge / discharge control unit 16 ends the power transmission.

Next, the operation of the charge / discharge system of this embodiment will be described with reference to FIG.
In the charge / discharge system of this embodiment, when the completion time (T3 in the figure) is greater than the total time of the discharge time (T1 in the figure) and the charging time (T2 in the figure), the battery 11 is discharged. Is done. When discharging is performed, the amount of charge of the battery 11 decreases with the passage of time from the amount of charge before the start of discharging (X in the figure). The amount of charge of the battery 11 reaches the lower limit amount (Min in the figure) when the discharge time has elapsed (TE1 in the figure). Thereafter, the charge amount of the battery 11 is increased with the elapse of time by the start of charging upon arrival of the discharge start time (TS1 in the figure). The amount of charge of the battery 11 reaches the fully charged state (Max in the drawing) when the charging time elapses (TE2 in the drawing), that is, when the charging completion time arrives.

  When the charge amount of the battery 11 is changed in this way, the charge amount between the start of discharging and the arrival of the charging start time is less than before the start of discharging, that is, when the vehicle 10 is not used. Become. In particular, the charge amount is set as the lower limit amount after the elapse of the discharge time until the charge start time. Therefore, the travel of the vehicle 10 can be limited by reducing the amount of charge when the vehicle 10 is no longer used. Specifically, the distance that the vehicle 10 can travel can be shortened. As a result, the theft of the vehicle 10 can be suppressed.

  On the other hand, since the charging is started when the charging start time arrives, the charging amount is returned to the requested charging state (full charging state) by the charging completion time even if the vehicle 10 has once reduced the charging amount to the lower limit amount. be able to. That is, it is possible to suppress a situation in which the battery 11 is not charged when the user uses the vehicle 10. Therefore, the user is not inconvenienced.

Therefore, according to the present embodiment, the following effects can be obtained.
(1) If there is a margin before the charging start time, the battery 11 is discharged until the charging start time arrives to reduce the amount of power stored in the battery 11. Thereby, a restriction | limiting can be added to driving | running | working of a vehicle. Therefore, theft of the vehicle can be suppressed. When the charging start time arrives, the battery 11 is charged to the required charging state (fully charged state). In the present embodiment, as the calculation / determination unit 15 determines that the battery 11 is charged before the charging start time, the battery 11 is charged after being discharged. Can be returned to the required charge state.

  (2) If the calculation / determination unit 15 determines that there is no margin before the charging start time, the battery 11 is charged to the required charge state when the charging start time arrives without discharging. For this reason, when the user uses the vehicle 10, the state of charge of the battery 11 can be changed to the required state of charge.

  (3) The calculation / determination unit 15 calculates the charging start time from the charging completion time. For this reason, the user can set the time when the vehicle 10 is desired to be used without considering the time required for charging, and the convenience of the user can be achieved. That is, when the user sets the charging start time, it must be set while considering the time required for charging, and the processing related to the setting becomes complicated.

  (4) When the completion time (T3 in FIG. 2) is greater than the total time of the discharge time (T1 in FIG. 2) and the charging time (T2 in FIG. 2), the calculation / determination unit 15 Start discharging. For this reason, the charge state of the battery 11 can be reliably discharged to the lower limit amount. Therefore, traveling of the vehicle 10 can be more reliably restricted, and the vehicle 10 can be prevented from being stolen. When the charging start time arrives, the battery 11 is charged from the lower limit amount to the fully charged state, so that when the user uses the vehicle 10, the charging state of the battery 11 is returned to the required charging state. Can do.

  (5) The lower limit amount of the battery 11 when discharging is set to an amount where the charge amount exceeds 0%. For this reason, since it does not discharge until the charge amount of the battery 11 becomes 0%, it can suppress impairing the battery life.

  (6) The power storage device 18 is charged with the discharged power. For this reason, the discharged electric power can be reused. Therefore, an environment-friendly system can be constructed without wasting electric energy.

  (7) The setting unit 13 is provided in the vehicle 10. For this reason, the user can set the charging completion time and the discharge permission information while riding. Therefore, convenience for the user can be achieved.

  (8) The vehicle 10 and the charging stand 14 perform signal transmission / reception and charging / discharging through the charging / discharging plug P connecting the vehicle 10 and the charging stand 14. For this reason, charging / discharging of the battery 11 can be performed without making a user think about the parking position of the vehicle 10, etc. carefully. That is, it is possible to construct a system that is convenient for the user.

In addition, you may change the said embodiment as follows.
The charge / discharge system of the embodiment may be embodied as a system for home use (single-family house, apartment house, etc.). In this case, the charging stand 14 is installed in a parking space of a household house, and the power storage device 18 is installed in the site of the house. Further, the charge / discharge system of the embodiment may be embodied as a system installed in a public facility (a school, a public hall, etc.). In this case, the charging stand 14 is installed in the parking space of the public facility, and the power storage device 18 is installed in the site of the public facility. Further, the charge / discharge system of the embodiment may be embodied as a system installed in a commercial facility (accommodation facility, shopping facility, charging station, etc.). In this case, the charging stand 14 is installed in a parking space of a commercial facility, and the power storage device 18 is installed in the premises of the commercial facility.

  The power transmission destination (supply destination) of the discharged power may be another power transmission destination instead of the power storage device 18. For example, a power consuming device other than the vehicle 10 to be discharged may be used as another power transmission destination. The power consuming device may be any device that consumes power, and may be, for example, another vehicle that is charging, home equipment, or other in-facility equipment. The power transmission destination of the discharged power may be the power system 17.

  ○ The lower limit amount in the case of discharging may be a fixed amount or a variation amount that can be changed by a human operation. Further, the lower limit amount can be arbitrarily changed regardless of whether it is a fixed amount or a variation amount. For example, an amount set based on the travel distance may be used.

O If the lifetime of the battery 11 is not taken into consideration, the lower limit amount in the case of discharging may be set to 0%.
A setting unit 13 and a calculation / determination unit 15 may be provided in the charging stand 14. In addition, the setting unit 13 and the calculation / determination unit 15 may be provided in the vehicle 10. When the calculation / determination unit 15 is provided in the vehicle 10, the calculation / determination unit 15 directly instructs the charge / discharge control unit 12 to start discharge.

The vehicle 10 or the charging stand 14 may be equipped with a function for forcibly canceling the discharge according to the intention of the user.
A process for determining the state of charge may be added to the process of step S13 in FIG. That is, when the charge amount is less than the predetermined amount, it may be determined that the battery is not discharged even if there is a time margin. The predetermined amount in this case is a value that shortens the travel distance, and is preferably a value close to the lower limit amount. That is, in this other example, if there is no difference in terms of suppressing theft between the case of discharging and the case of not discharging, it is determined that the necessity of discharging is low and discharging is not performed.

  The charging start time may be calculated based on a time (for example, one hour before) before the charging completion time. In this case, since the charging of the battery 11 can be completed before the charging completion time set by the setting unit 13, it is possible to give a further margin until the user uses the vehicle 10. it can.

  ○ The required charge state may be the amount of charge below the fully charged state. This charging amount may be set by the setting unit 13 of the vehicle 10 and transmitted to the calculation / determination unit 15 of the charging stand 14, or means for setting the charging amount as the required charging state on the charging stand 14 side. May be provided.

  A charging start time may be set in the setting unit 13 of the vehicle 10 instead of the charging completion time. In this case, the calculation / determination unit 15 calculates by directly acquiring the charge start time set in the setting unit 13 and functions as a start time calculation unit. When the setting unit 13 sets the charging start time, a display device may be provided on the vehicle 10 and the display device may display a time required for charging to a predetermined charging state (for example, a fully charged state). .

  O You may perform determination of step S13, ie, determination of the presence or absence of tolerance as follows. That is, the calculation / determination unit 15 calculates the current time from a built-in timer, and calculates the standby time from the current time and the charging start time until charging is started. For example, when the charging start time is 7 am and the current time is 11 pm, the calculation / determination unit 15 calculates 8 hours as the standby time. Then, the calculation / determination unit 15 may make an affirmative determination in step S13 as having a margin when the previously calculated standby time exceeds a predetermined time. On the other hand, when the previously calculated standby time does not exceed the predetermined time, the calculation / determination unit 15 may make a negative determination in step S13 as having no margin.

  An example of the change in the charge amount in this case is shown in FIG. For example, the predetermined time is 2 hours and the waiting time is 3 hours. In this case, even if the charge amount cannot be discharged to the lower limit amount during the standby time (3 hours), a predetermined amount (Y in the figure) than the charge amount (X in the figure) at the start of discharge. , Can be less. For this reason, since a restriction | limiting can be added to driving | running | working of the vehicle 10 by reducing charge amount, a theft can be suppressed. Then, when the charging start time (TS2 in the figure) arrives during discharging, discharging is terminated at that time and charging is started. Then, the battery 11 is in a required charge state (full charge state) when the charge completion time (TE3 in the figure) arrives. Further, even in the case of this another example, as shown by a solid line in FIG. 2, charging can be started at the charging start time after discharging the charging amount to the lower limit amount.

  In addition, the predetermined time compared with the standby time in the above-described example may be set in advance as a fixed time in the calculation / determination unit 15 of the charging stand 14 or may be changed by a user's human operation. It may be set. The predetermined time may be set in advance as a fixed time in the setting unit 13 of the vehicle 10 or may be set as a time that can be changed by a user's human operation. In the case where the predetermined time is set on the vehicle 10 side and the charging / stand 14 includes the calculation / determination unit 15, the predetermined time is transmitted from the vehicle 10 side to the calculation / determination unit 15. The time set as the predetermined time may be set to any time for the purpose of suppressing theft.

  The embodiment is embodied in a charging / discharging system that performs charging / discharging by mechanically connecting the charging / discharging plug P to the vehicle 10, but without using the charging / discharging plug P, the vehicle 10 and the charging device (ground side It may be embodied in a non-contact charge / discharge system in which charging is performed by electrically connecting equipment). As shown in FIG. 5, in the non-contact charging / discharging system, the first coil 21 attached to the vehicle 10 side and the second coil 23 of the ground side equipment 22 embedded in the floor of the parking space are matched. Thus, the vehicle 10 is stopped. At this time, the first coil 21 and the second coil 23 are separated and brought into a non-contact state. In the non-contact charging / discharging system, the battery 11 of the vehicle 10 is charged by receiving power from the second coil 23 by the first coil 21. On the other hand, in the non-contact charging / discharging system, the battery 11 of the vehicle 10 is discharged by receiving power from the first coil 21 by the second coil 23. Such non-contact charge / discharge system methods include a resonance method and an electromagnetic induction method. In the non-contact charging / discharging system, the vehicle-side controller 24 mounted on the vehicle 10 and the power-supply side controller 25 installed on the ground-side facility 22 can communicate with each other wirelessly. That is, transmission / reception of signals necessary for charging / discharging, such as a charging start / stop signal, is performed by wireless communication between the vehicle-side controller 24 and the power-supply-side controller 25. In the non-contact charging / discharging system, the ground side equipment 22 corresponds to the charging stand 14 in the embodiment.

Next, a technical idea that can be grasped from the above embodiment and another example will be added below.
(A) a charging device that supplies the vehicle with the electric power transmitted from the electric power system, the setting unit is provided in the vehicle, the start time calculation unit, and the determination unit are the vehicle and the charging unit 5. The charge / discharge system according to claim 3, wherein the charge / discharge control unit is provided in any one of the devices, and the charge / discharge control unit is provided in both the vehicle and the charging device.

  (B) a standby time calculation unit that calculates a standby time until the charging is started, and the determination unit determines that there is a margin until the charging start time when the standby time exceeds a predetermined time. The charging / discharging system as described in any one of Claims 1-3 characterized by the above-mentioned.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 11 ... Battery, 12, 16 ... Charge / discharge control part, 13 ... Setting part, 14 ... Charging stand, 15 ... Calculation / determination part, 17 ... Electric power system, 18 ... Power storage device.

Claims (6)

In a charge / discharge system for charging / discharging a storage battery mounted on a vehicle,
A start time calculation unit for calculating a charge start time for starting charging of the storage battery;
A determination unit for determining a margin until the charging start time;
A charge / discharge control unit that discharges the storage battery and charges the storage battery to a required charge state when the charging start time arrives when the determination unit determines that there is a margin; system.   The charging / discharging control unit according to claim 1, wherein when the determination unit determines that there is no tolerance, the charge / discharge control unit charges the storage battery when the charging start time arrives without discharging the storage battery. Discharge system. A setting unit for setting a charging completion time to set the charging state of the storage battery to the required charging state;
The start time calculation unit calculates the charge start time based on a time required to charge a storage battery in a predetermined charge state to a required charge state when the charge completion time arrives. The charge / discharge system according to claim 1 or 2. A setting unit for setting a charging completion time to set the charging state of the storage battery to the required charging state;
The determination unit is more than a total time obtained by adding the time required to discharge the storage battery to a predetermined charge state and the time required to charge the discharged storage battery to the required charge state at the time when the charge completion time arrives. The charge / discharge system according to any one of claims 1 to 3, wherein when the time until the charging completion time is longer, it is determined that there is a margin until the charging start time. .   5. The charge / discharge system according to claim 3, wherein the predetermined charge state is a charge amount exceeding 0% as a charge state of the storage battery, and is a predetermined lower limit amount. . A charging device for supplying the vehicle with electric power transmitted from an electric power system;
The power discharged from the storage battery is charged to a power storage device different from the storage battery connected to the charging device, transmitted to a power consuming device other than the vehicle to be discharged, or transmitted to the power system. The charge / discharge system according to any one of claims 1 to 5, wherein the charge / discharge system is provided.