JP2019080403A - Charge and discharge management system of vehicle-mounted battery - Google Patents

Abstract

To provide a charge and discharge management system of a vehicle-mounted battery for facilitating determination of whether to permit a use of the vehicle-mounted battery for adjusting supply and demand balance for a user or an owner of a vehicle.SOLUTION: A charge and discharge management system 10 includes: a vehicle-mounted battery mounted on a vehicle; and a charging and discharging device 22 for charging and discharging the vehicle-mounted battery. The charging and discharging device 22 is capable of selectively discharging power from the vehicle-mounted battery to a power grid and supplying power from the power grid to the vehicle-mounted battery. The charging and discharging management system 10 further includes a battery deterioration notification unit for notifying a user or an owner of the vehicle of a degree of deterioration progress of the vehicle-mounted battery accompanying the charging and discharging operation between the vehicle-mounted battery and the power grid in the charging and discharging device 22.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a charge / discharge management system of a vehicle-mounted battery.

  In order to adjust the demand-supply balance of the electric power in the grid network of the electric power company by charging / discharging of the vehicle-mounted battery of the vehicle, Patent Document 1 promotes charging / discharging of the vehicle-mounted battery in an area where surplus or shortage of power occurs. A system for notifying a user of incentive conditions is described. In this system, an incentive is given to the user who charged / discharged according to the incentive condition among the users to whom the incentive condition was notified.

  Patent Document 2 describes an estimation device that estimates the internal state of a battery for each operation cycle according to a battery model equation, and estimates the charging rate of the battery and the battery current based on the estimation result. In this estimation device, a predetermined capacity deterioration parameter is estimated from the estimated value of the battery charge rate and the battery current and the measured value of the battery current measured by the current sensor, and the full charge capacity of the battery and the battery deterioration from the parameters Estimate the full charge capacity maintenance rate of

JP, 2015-32286, A JP, 2010-60384, A

  In the system described in Patent Document 1, when the power of the grid is excessive, discharge from the on-board battery to the grid is promoted. On the other hand, when the power of the grid is excessively generated, charging from the grid to the on-vehicle battery is promoted. This makes it easier to avoid a power failure, and may reduce the waste of generated power generated by solar power generation and the like.

  However, when the charge and discharge operation between the in-vehicle battery and the grid system is repeated, the in-vehicle battery is likely to be deteriorated. On the other hand, the user or the owner of the vehicle can not grasp the degree of deterioration of the on-vehicle battery due to the charge and discharge operation. Deterioration of the battery leads to a decrease in the asset value of the vehicle. For example, the asset value decreases as the vehicle purchase price decreases, the frequency of battery replacement increases, and the maintenance cost of the vehicle increases. The user or owner of the vehicle wants to judge whether or not to permit the use of the on-board battery for balancing supply and demand, from the comprehensive loss and gain of the incentive given by the permission and the reduction in the asset value of the vehicle. Conceivable. At this time, if the degree of deterioration of the battery due to the use of the in-vehicle battery for the balance adjustment of the supply and demand is not known, it is judged by the user or the owner of the vehicle whether or not the use of the in-vehicle battery for the balance adjustment is permitted. difficult. Although the above describes the adjustment of the balance between supply and demand of the grid of the electric power company, the permission of the use of the onboard battery for the adjustment of balance of supply and demand of the grid including the power plant and the transmission unit is determined in a limited area or community. In the same case, there are similar disadvantages.

  An object of the present invention is to facilitate determination of whether to permit the use of an in-vehicle battery for adjustment of supply and demand balance in a vehicle user or owner in a charge-discharge management system of an in-vehicle battery.

  A charge / discharge management system of a vehicle battery according to the present invention is a charge / discharge management system of a vehicle battery including a vehicle battery mounted on a vehicle and a charge / discharge device for charging / discharging the vehicle battery, The discharge device is capable of selectively discharging power from the in-vehicle battery to the grid and selectively supplying power from the grid to the in-vehicle battery, and the discharge device may be connected to the grid in the charge / discharge device. And a battery deterioration notification unit for notifying a user or an owner of the vehicle of the degree of deterioration progress of the in-vehicle battery along with the charge / discharge operation of the in-vehicle battery.

  ADVANTAGE OF THE INVENTION According to the charge / discharge management system of the vehicle-mounted battery which concerns on this invention, facilitation of determination of whether utilization of the vehicle-mounted battery for supply-demand balance adjustment is permitted in the user or owner of a vehicle can be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the charging / discharging management system of embodiment which concerns on this invention. In the embodiment according to the present invention, it is a configuration diagram showing a state in which power is supplied from the grid to the in-vehicle battery when the amount of power supplied by the grid exceeds the demand. In the embodiment according to the present invention, it is a configuration diagram showing a state in which power is supplied from the in-vehicle battery to the grid network when the demand amount of power in the grid network exceeds the supply amount. FIG. 7 is a diagram showing an example of display content of the display unit in the embodiment according to the present invention.

  Hereinafter, embodiments of the present invention will be described using the drawings. When a plurality of embodiments, modified examples, and the like are included in the following, they can be implemented in combination as appropriate. Hereinafter, in all the drawings, the same elements will be described with the same reference numerals.

  FIG. 1 is a block diagram showing a charge / discharge management system 10 of a vehicle-mounted battery of the embodiment. The charge and discharge management system 10 includes an electric power company 12, a vehicle 20 (FIGS. 2 and 3), and a charge and discharge device 22.

  The power company 12 includes a control device 13, a communication device 14, a display unit 15, and a payment unit 16. The control device 13 monitors the balance between supply and demand of power in the system power network 40 (FIG. 2, FIG. 3), and transmits balance information on supply and demand to the communication device 14. The “supply and demand balance information” includes information on the magnitude relationship between the amount of supply of power and the amount of demand in the grid 40.

  The communication device 14 transmits the supply and demand balance information to the charge and discharge device 22 wirelessly or by wire. An on-vehicle battery 21 of the vehicle 20 is connected to the charge / discharge device 22 through a power feeding cable. In this case, the power company can use the communication device 14 to provide information on the reward as compensation for charging and discharging which can be received by the user or the owner of the vehicle by charging and discharging work and the compensation deposit as compensation for compensation. To the charge / discharge device 22.

  The display unit 15 is, for example, a display, and is controlled by the control device 13 to display the acquired supply and demand balance information and the like. The payment unit 16 pays to the user or the owner of the vehicle 20 on which the in-vehicle battery 21 is mounted according to the charge / discharge work for the grid system 40 of the on-vehicle battery 21 (FIG. 2, FIG. 3) described later. Further, the payment unit 16 pays the user or the owner of the vehicle 20 on which the in-vehicle battery 30 is mounted to a compensation equivalent amount equivalent to the below-described asset value decrease amount (estimated value) of the in-vehicle battery 21. For example, the payment agent unit provided in the charge / discharge device 22 based on the data transmitted to the charge / discharge device 22 by the payment unit 16 through a wired cable or a wireless signal, It may be paid as money by not shown. The charge / discharge device 22 has a payment unit, and the payment unit acts on behalf of the charge / discharge charge and compensation amount according to the charge / discharge work and pays the user or the owner the charge fee. The electric power company 12 may later refund the payment unit of.

  The charge / discharge consideration and compensation equivalent consideration may be electronic money, coupon, gift certificate, gift, exchange point corresponding to money, or discount point equivalent to the discount amount for payment of the user's power fee, in addition to money. . The exchange point may be a point that can be used to discount a price or exchange for goods for a product in a specific field, for example, a product in a field that promotes energy saving. The payment unit 16 may set, for the user or the owner, a schedule for payment of money, electronic money, exchange points, or discount points corresponding to charge / discharge consideration and deposit equivalent consideration. At this time, the payment unit 16 may transmit the information such as money to the device owned by the user or the owner via the communication device 14 by wire or wirelessly. The person in charge of the payment department of the power company 12 confirms the above-described setting of the scheduled payment, and pays the user or the owner according to the setting.

  On the other hand, the charge / discharge device 22 is installed, for example, in a charge / discharge station or a house. The on-vehicle battery 21 of the vehicle 20 is connected to the charge / discharge device 22 via a power feeding cable. The vehicle 20 is an electric car, a hybrid vehicle or the like. A hybrid vehicle is equipped with an engine and a traveling motor, and travels using one or both of the engine and the traveling motor as a drive source. An on-vehicle battery 21 connected to a traveling motor is mounted on such a vehicle 20. The electric car or the hybrid vehicle not only discharges the traveling motor from the in-vehicle battery 21 to drive the traveling motor, but also uses the traveling motor as a generator by rotating the traveling motor by the rotational force of the wheels when braking the vehicle. May be When the traveling motor is used as a generator, the power obtained by the power generation is collected by the on-vehicle battery 21 to charge the on-vehicle battery 21.

  The charge / discharge device 22 includes a charge / discharge circuit 24, a control device 25, a communication device 27, and a display unit 28. The charge / discharge circuit 24 is connected to the on-vehicle battery 21 as shown in FIG. 2 and FIG. 3 described later. The charge / discharge circuit 24 exchanges power with the grid 40. Thereby, in a state where the in-vehicle battery 21 is connected to the charge and discharge circuit 24, transfer of power between the grid system 40 and the in-vehicle battery 21 becomes possible. In this state, the charge and discharge circuit 24 causes the on-vehicle battery 21 to perform charge and discharge with the grid 40. The operation of the charge and discharge circuit 24 is controlled by the control device 25. The charge / discharge device 22 can selectively discharge power from the in-vehicle battery 21 to the grid 40 and supply power from the grid 40 to the in-vehicle battery 21, that is, charge the in-vehicle battery 21 selectively.

  The control device 25 receives the supply and demand balance information of the power from the power company 12 via the communication device 27. Furthermore, the control device 25 represents the charge / discharge time performed by the charge / discharge circuit 24 via the communication device 27, information on charge / discharge work including charge / discharge power (charge / discharge information), and the degree of deterioration described later. Information (battery deterioration information) is transmitted to the power company wirelessly or by wire. The control device 25 corresponds to a control unit. The control device 25 is configured to include an arithmetic processing unit, a storage unit such as a memory, an I / O interface, and the like.

  The display unit 28 is, for example, a display, and displays supply and demand balance information, the contents of charge and discharge work shown in FIG. 4 described later, and the amount of money that the user or owner of the vehicle can receive. The display unit 28 is controlled by the control device 25.

  FIG. 2 is a configuration diagram showing a state in which power is supplied from the grid 40 to the on-vehicle battery 21 when the amount of power supplied by the grid 40 exceeds the demand in the embodiment. In the case shown in FIG. 2, power is supplied from the power company 12 to the demand unit 41 that requires power, such as a house or a building, but the supply amount exceeds the demand amount. In FIG. 2 and FIG. 3 described later, the flow of power is indicated by thick arrows. In this case, the surplus of the power generated by the power company 12 is charged to the on-vehicle battery 21, which makes it easy to eliminate the imbalance between the supply and demand of the power in the grid 40. At this time, since the balance between supply and demand is displayed on the display unit 28 of the charge and discharge device, the user or the owner of the vehicle looking at the display unit 28 can grasp the supply and demand balance information. The charge / discharge device 22 operates to charge the in-vehicle battery 21 in a state where the vehicle user, the owner, or the operator of the charge / discharge operation connects the in-vehicle battery 21 and the charge / discharge device 22. At this time, the charge / discharge device 22 may be configured to measure the AC frequency of the grid 40 and estimate the balance between supply and demand from the measured value. In this case, when the AC frequency decreases, the demand amount becomes larger than the supply amount, and when the AC frequency increases, the supply amount becomes larger than the demand amount. The control device 25 determines the charge amount of the in-vehicle battery 21 based on the acquired or estimated supply and demand balance and the battery state acquired from the vehicle.

  Adjustment of balance of supply and demand may be performed by using power equipment such as thermal power generation, hydroelectric power generation, stationary power storage device, etc. in addition to in-vehicle battery 21, but power equipment can be obtained by using many in-vehicle batteries 21. Can reduce the power capacity of the equipment and control the equipment construction cost and the operation cost of the equipment.

  FIG. 3 is a configuration diagram showing a state in which power is supplied from the on-board battery 21 to the grid system 40 when the demand amount of power in the grid system 40 exceeds the supply amount in the embodiment. In the case shown in FIG. 3, when the power generation shortage in the power company 12 is discharged from the on-vehicle battery 21, it becomes easy to cancel the unbalance of supply and demand of the power in the grid 40. In this case, after the user or the owner of the vehicle grasps the supply and demand balance information on the display unit 28, the on-vehicle battery 21 and the charge and discharge device 22 are connected. As a result, the charge / discharge device 22 operates to discharge the in-vehicle battery 21 to the grid 40. In this case, the control device 25 determines the amount of discharge of the in-vehicle battery 21 based on the acquired or estimated supply and demand balance and the battery state acquired from the vehicle.

  Returning to FIG. 1, the control device 25 further includes a battery deterioration calculation unit 26. The battery deterioration calculation unit 26 calculates the degree of progress of the deterioration of the in-vehicle battery 21 associated with the charge and discharge operation with the grid 40 in the charge and discharge circuit 24, and transmits the calculated progress degree to the display unit 28. The display unit 28 converts the transmitted degree of deterioration progress into an asset value decrease amount, and displays a deterioration deposit equivalent to the asset value decrease amount.

  Here, the degree of deterioration can be calculated from the battery state before and after the above-described charge and discharge operation. For example, an estimated value of SOC determined from an actual value of SOC (State of Charge) determined from an integrated value of measured battery current and an estimated integrated value of battery current before and after the charge / discharge operation. The degree of progress of battery deterioration can be calculated based on the difference between Then, the progress degree of deterioration of the battery due to the charge and discharge operation can be calculated from the progress degree of deterioration before and after the charge and discharge operation. SOC is a charging rate for full charge of the on-vehicle battery 21. In order to calculate the deterioration progress degree, the control device 25 may acquire the battery state from the vehicle 20 by a wireless signal or the like.

  The degree of deterioration can also be calculated by a method different from the above. For example, the degree of deterioration may be calculated using the method described in Patent Document 2 above. Specifically, using the battery temperature Tb and the battery voltage Vb measured by the temperature sensor and the voltage sensor, the battery deterioration calculation unit 26 uses the battery model formula for each calculation cycle according to the battery model formula corresponding to the on-vehicle battery 21. Estimate the state. Then, the battery degradation calculation unit 26 estimates the SOC and the battery current of the battery based on the estimation result. The battery deterioration calculating unit 26 estimates a predetermined capacity deterioration parameter from the estimated value of the charging rate and the battery current and the measured value Ib of the battery current measured by the current sensor, and the full charge capacity of the battery from the capacity deterioration parameter. Estimate the estimated value Qd of The battery deterioration calculation unit 26 calculates the full charge capacity maintenance rate dQr (= Qd / Qin) using the estimated value Qd and the full charge capacity Qin in the initial state, and the deterioration progress degree is calculated from the calculated value Calculated from a predetermined relational expression.

  At this time, the estimated value Qd changes according to the positive electrode capacity retention rate k1, the negative electrode capacity retention rate k2, and the positive and negative electrode composition correspondence offset capacity ΔQs, which are capacity deterioration parameters. The positive electrode capacity retention rate k1 and the negative electrode capacity retention rate k2 are ratios of (capacity after deterioration) / (initial capacity) in each of the positive electrode and the negative electrode of the battery. Positive and negative electrode composition correspondence offset capacity ΔQs is a deviation from an initial state of a combination of an average charge rate inside the positive electrode active material which is the composition of the positive electrode and an average charge rate inside the negative electrode active material which is the composition of the negative electrode It is a capacity corresponding to the shift amount Δθ2 of the negative electrode composition axis with respect to the composition axis. The positive and negative electrode composition correspondence offset capacity ΔQs is calculated by the following equation using the negative electrode capacity Q2 in the initial state of the negative electrode, the offset amount Δθ2, and the negative electrode capacity retention rate k2.

  ΔQs = k2 × Q2in × Δθ2 (1)

  The positive electrode capacity retention rate k1, the negative electrode capacity retention rate k2 and the positive / negative electrode composition correspondence offset capacity ΔQs are the measured value Ib of the battery current measured by the current sensor, and the battery SOC and battery current estimated by the battery degradation calculation unit 26. It can be estimated from the estimated value Ite. Therefore, the full charge capacity maintenance rate dQr can be calculated, and thereby, the deterioration progress degree can be calculated.

  The display unit 28 notifies the vehicle owner or the user by displaying the degree of deterioration progress received from the control device 25. The display unit 28 corresponds to a battery deterioration notification unit. Although the degree of deterioration may be displayed on the display unit 28 as a numerical value or a graph, the degree of deterioration may be displayed by converting it into the amount of decrease in the asset value of the in-vehicle battery 21 to notify the user or owner of the vehicle. This makes it easier for the user or the owner to understand the relationship with the charge / discharge charge.

  In addition to the display unit 28 or instead of the display unit, the power company 12 is provided with a shipping unit as a battery deterioration notification unit that automatically ships the sheet on which the progress of deterioration is displayed to the user or owner of the vehicle. May be Alternatively, the power company 12 may include, as a battery deterioration notification unit, a transmission unit that transmits an e-mail in which the degree of deterioration is described to the user or the owner. Further, the battery deterioration notification unit of the power company 12 may display the deterioration progress degree on the web page of the power company 12, or may display the deterioration progress degree on a smart meter disposed in a house in which the user or the owner lives. The smart meter has a communication function capable of detecting power supplied from a commercial power source and communicating with a management server managed by the power company 12.

  In addition, the power company 12 can also send a sheet indicating the progress of deterioration to the user or the owner by mail to the user or the owner, or by e-mail. For example, the degree of deterioration may be added to the notification sheet of the electricity bill sent by the power company 12 to the user or the owner.

  FIG. 4 shows an example of display content of the display unit 28. As shown in FIG. The display unit 28 displays a system connection time which is charge / discharge time, adjusted power which is charge / discharge power, a reward which is charge / discharge consideration, and a deterioration deposit which is a compensation equivalent. The user or the owner can confirm the content displayed on the display unit 28 and confirm that the reward is greater than the deterioration deposit, thereby confirming that the in-vehicle battery 21 is used to adjust the balance between supply and demand. .

  Further, the control device 25 of the charge / discharge device 22 determines the charge / discharge amount of the in-vehicle battery 21 according to the battery state including the deterioration progress degree of the in-vehicle battery 21 and charges / discharges the in-vehicle battery 21 with the determined charge / discharge amount. Control the charge / discharge circuit 24 in the same manner. The battery status may include battery SOC and battery temperature. When determining the charge and discharge amount, the control device 25 first determines the tentative charge and discharge amount from the supply and demand balance information. When the SOC is lower than the lower limit of the predetermined range, discharging from the in-vehicle battery 21 is prohibited, and when the SOC is higher than the upper limit of the predetermined range, charging of the in-vehicle battery 21 is prohibited. For example, in order to suppress the degree of deterioration of the in-vehicle battery 21, discharging the in-vehicle battery 21 is prohibited when the SOC is less than 20%, and charging of the in-vehicle battery 21 is prohibited when the SOC exceeds 80%. be able to.

  Further, when the battery temperature is higher than a predetermined temperature, the charge and discharge amount is regulated to be small. In addition, when the degree of progress of deterioration is equal to or higher than a predetermined degree of progress, the use of the in-vehicle battery 21 for adjusting the balance between supply and demand is prohibited. The control device 25 changes and determines the final charge / discharge amount from the tentative charge / discharge amount so as to satisfy these conditions.

  In the control of the charge / discharge circuit 24 described above, the user can set the required SOC range, and when the SOC of the in-vehicle battery 21 is lower than the lower limit of the required SOC range, it is determined that the SOC is lower than the lower limit of the predetermined range May be Further, when the SOC of the in-vehicle battery 21 is higher than the upper limit of the required SOC range, it may be determined that the SOC is higher than the upper limit of the predetermined range.

  According to the charge and discharge management system 10 of the on-vehicle battery 21 described above, the supply and demand balance information is displayed on the display unit 28 of the charge and discharge device 22. Accordingly, it is possible to urge the user or the owner of the vehicle looking at the display unit 28 to adjust the balance between supply and demand by eliminating the imbalance between the supply and demand using the on-vehicle battery 21. Therefore, the balance between supply and demand of the grid 40 can be adjusted by using the on-vehicle battery 21. Furthermore, the degree of progress of the deterioration of the in-vehicle battery 21 due to the charge and discharge of the in-vehicle battery 21 with respect to the system power network 40 can be notified to the user or owner of the vehicle by the battery deterioration notification unit such as the display unit 28. As a result, it becomes easy for the user or owner of the vehicle to grasp the profit and loss by permitting the use of the in-vehicle battery 21 for adjusting the supply and demand balance, and the judgment as to whether or not to permit the permission can be facilitated. Therefore, the user or owner of the vehicle can easily decide to participate in the charge / discharge management system 10.

  Specifically, when the in-vehicle battery 21 is used to adjust the balance of supply and demand of the grid 40, the in-vehicle battery 21 is easily deteriorated, and the asset value of the vehicle including the in-vehicle battery 21 is reduced. For example, assuming that the initial value of use of the in-vehicle battery 21 is 500,000 yen and the life of the in-vehicle battery 21 is 5,000 cycles in charge and discharge cycles, the asset value of the in-vehicle battery 21 is 100 in one charge and discharge cycle. About a yen falls. On the other hand, the price of the in-vehicle battery 21 differs depending on the vehicle type of the vehicle, and the degree of deterioration of the battery differs depending on the charge / discharge pattern. Thus, in a configuration that does not include the battery deterioration notification unit, it is difficult to grasp the deterioration progress degree including the asset value decrease amount, for both the user of the vehicle and the owner. If neither the user nor the owner can grasp the deterioration progress degree, it is judged whether the charge / discharge compensation paid from the power company 12 is appropriate by using the on-vehicle battery 21 to adjust the balance of supply and demand of the grid 40. Can not. For this reason, it is difficult for the user or the owner to decide to participate in the charge and discharge management system 10. As in the configuration of the above embodiment, the user or the owner can easily understand that the charge / discharge compensation is appropriate by notifying the user or the owner of the deterioration progress degree by the battery deterioration notification unit, and the charge / discharge can be performed. It becomes easy to decide to participate in the management system 10.

  Furthermore, the control device 25 determines the charge / discharge amount of the in-vehicle battery 21 according to the battery state, and controls the charge / discharge circuit 24 to charge / discharge the in-vehicle battery 21 with the determined charge / discharge amount. Thus, the in-vehicle battery 21 can be charged and discharged only when the degree of deterioration due to charge and discharge is low due to the battery state of the in-vehicle battery 21. Therefore, the decrease in the life of the in-vehicle battery 21 can be suppressed. For example, when the SOC of the in-vehicle battery 21 is higher than the upper limit of the predetermined range and lower than the lower limit of the predetermined range, the life of the in-vehicle battery 21 tends to be reduced when charging and discharging the grid 40. At this time, the predetermined range is a range in which the degree of progress of deterioration due to charge and discharge is low in the SOC. On the other hand, if the charge / discharge amount is determined so as to charge / discharge the grid 40 only when the SOC is within the predetermined range, it is possible to suppress a decrease in the life of the in-vehicle battery 21.

  Although the battery deterioration calculating unit 26 of the control device 25 calculates the degree of deterioration in the above description, the control device included in the vehicle may have a battery deterioration calculating unit. The battery state before and after charge and discharge necessary for calculation of the degree of deterioration progress is input to the control device. At this time, the degree of progress of deterioration calculated by the battery deterioration calculating unit may be displayed on a display unit such as a display included in the vehicle.

  In addition, the control device 13 of the power company 12 may include a battery deterioration calculation unit that calculates the deterioration progress degree. At this time, the charge and discharge work amount from the charge and discharge device 22 and the model number of the on-board battery 21 connected to the charge and discharge device 22 are transmitted to the control device 13 as information via the communication device 14. The battery deterioration calculation unit may store, in advance, a map representing data representing the relationship between the in-vehicle battery 21 and the charge / discharge work amount and the deterioration progress degree. Information on the degree of deterioration progress calculated by the power company 12 is transmitted to the charge / discharge device 22 and displayed on the display unit 28.

  The charge and discharge management system may also include a relay unit such as a power monitoring center that communicates information with each of the charge and discharge device 22 and the power company 12. At this time, information is communicated only between the charge / discharge device 22 and the power company 12 via the relay unit.

  Moreover, adjustment of the supply-and-demand balance of the system power grid 40 of the electric power company 12 was demonstrated above. On the other hand, the configuration of the present invention may be applied to a configuration in which the on-board battery 21 is connected to a grid system including a power plant and a power transmission unit in a limited area or community. In this case, transmission / reception balance information and charge / discharge information of the grid 40 may be transmitted / received between the power monitoring center in the above area or community and the charge / discharge device. Also in this case, as in the above embodiment, the battery deterioration notification unit notifies the vehicle user or the owner of the degree of progress of deterioration associated with the charge / discharge operation, thereby allowing the on-vehicle battery to be adjusted for supply / demand balance. It is possible to facilitate the determination of whether to permit the use of V.21.

    DESCRIPTION OF SYMBOLS 10 charge / discharge management system, 12 electric power companies, 13 control devices, 14 communication devices, 15 display parts, 16 payment parts, 20 vehicles, 21 vehicle batteries, 22 charge / discharge devices, 24 charge / discharge circuits, 25 control devices, 26 batteries Deterioration calculation unit, 27 communication devices, 28 display units, 40 grids, 41 demand units.

Claims (4)

What is claimed is: 1. A charge / discharge management system for a vehicle-mounted battery comprising: an on-board battery mounted on a vehicle; and a charge / discharge device for charging / discharging the vehicle-mounted battery,
The charge / discharge device is capable of selectively discharging power from the in-vehicle battery to the grid, and supplying power from the grid to the in-vehicle battery.
An in-vehicle battery charge / discharge management system, comprising: a battery deterioration notification unit for notifying a user or an owner of the vehicle of the degree of deterioration progress of the in-vehicle battery accompanying the charge / discharge operation with the grid power network in the charge / discharge device. In the vehicle battery charge / discharge management system according to claim 1,
The in-vehicle battery charge / discharge management system, wherein the battery deterioration notification unit converts the degree of deterioration progress of the in-vehicle battery into an asset value reduction amount and notifies the user or the owner of the vehicle. In the on-vehicle battery charge / discharge management system according to claim 2,
An in-vehicle battery charge / discharge management system, comprising: a payment unit that pays a compensation equivalent amount corresponding to the asset value decrease amount to a user or an owner of the vehicle or sets a payment schedule. In the charge / discharge management system of a vehicle battery according to any one of claims 1 to 3,
The charge / discharge circuit of the charge / discharge device is determined to determine the charge / discharge amount of the in-vehicle battery according to the battery state including the deterioration progress degree of the in-vehicle battery, and charge / discharge the in-vehicle battery by the determined charge / discharge amount. An in-vehicle battery charge / discharge management system comprising a control unit to control.

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