JP5853887B2 - In-vehicle battery charge / discharge control device - Google Patents

Description

  The present invention relates to an in-vehicle battery charge / discharge control apparatus that controls charging / discharging of an in-vehicle battery.

  As a charge / discharge control device for this type of in-vehicle battery that has been used in the past, for example, a configuration shown in the following Patent Document 1 can be exemplified. That is, in the conventional apparatus, the required power amount is calculated based on the information input by the user, and the necessary charging time required for charging the difference power amount between the required power amount and the remaining capacity of the in-vehicle battery. Calculated. The charging start time is determined based on the required charging time, and charging of the in-vehicle battery is started when the current time reaches the charging start time.

JP 2011-188731 A

  In recent years, with the increase in the size of an in-vehicle battery, the electric power of the in-vehicle battery is supplied to an external load. However, the above-described conventional device does not consider supplying the electric power of the in-vehicle battery to the external load. When the user uses the vehicle, the electric power of the in-vehicle battery is supplied to the external load. There may be a situation where the remaining capacity of the battery is less than the required capacity. When the remaining capacity of the in-vehicle battery is less than the required capacity, it is necessary to delay the departure time, and the convenience is significantly reduced.

  The present invention has been made to solve the above-described problems, and its purpose is to provide a remaining capacity of the in-vehicle battery when the user uses the vehicle even when the power of the in-vehicle battery is supplied to an external load. It is possible to avoid the occurrence of a situation where the required capacity is less than the required capacity, and to provide a charge / discharge control device for an in-vehicle battery that can improve user convenience.

  An in-vehicle battery charge / discharge control apparatus according to the present invention is an in-vehicle battery charge / discharge control apparatus that charges an in-vehicle battery and supplies electric power of the in-vehicle battery to an external load, and includes information input by a user. The control unit includes a control unit that calculates the required charging time based on the remaining capacity of the in-vehicle battery and charges the in-vehicle battery based on the calculated required charging time, and the control unit calculates the required charging time. The required charging time is calculated by regarding the remaining capacity of the battery as 0.

According to the charge and discharge control device for a vehicle-mounted battery of the present invention, the control means than that to calculate the necessary charging time is regarded as 0 the remaining capacity of the battery when calculating the required charging time, the vehicle battery power Even when the battery is supplied to the external load, it is possible to avoid the situation that the remaining capacity of the in-vehicle battery is less than the required capacity when the user uses the vehicle, and the convenience for the user can be improved.

It is a block diagram which shows the charging / discharging control apparatus of the vehicle-mounted battery by Embodiment 1 of this invention. It is a flowchart which shows the charging / discharging control operation by the control means of FIG. It is a flowchart which shows the charging / discharging control operation | movement which the control means of the charging / discharging control apparatus by Embodiment 2 of this invention performs. It is a flowchart which shows the charging / discharging control operation | movement which the control means of the charging / discharging control apparatus by Embodiment 3 of this invention performs.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a configuration diagram showing an in-vehicle battery charge / discharge control apparatus according to Embodiment 1 of the present invention. In the figure, a vehicle 1 is constituted by, for example, an electric vehicle or a plug-in hybrid vehicle. The vehicle 1 is equipped with an in-vehicle battery 10 and a charge / discharge control device 11. The in-vehicle battery 10 is constituted by an assembled battery formed by connecting a plurality of battery cells such as a plurality of lithium ion batteries, for example. The charge / discharge control device 11 includes a control unit 110 configured by, for example, a combination of a computer and a charge / discharge control circuit.

  The vehicle 1 is connected to an external power source 3 and an external load 4 via a stand 2. The stand 2 is equipment installed in, for example, a house and is connected to the vehicle 1 by a user. The external power source 3 is a power source such as a commercial power source and supplies power to the vehicle 1 for charging the in-vehicle battery 10. The external load 4 is, for example, a load of a home device system or the like, and can be operated by electric power supplied from the in-vehicle battery 10.

  The stand 2 is provided with input means 20. The input unit 20 is configured by, for example, a touch panel and the like, and is used by a user to input a use schedule of the vehicle 1. The use schedule of the vehicle 1 is information (for example, planned travel distance, destination, etc.) used for calculating how much power is required when the user next uses the vehicle 1, and the use This includes the scheduled use start time when the person next starts using the vehicle 1. The control unit 110 of the charge / discharge control device 11 charges the in-vehicle battery 10 by the power from the external power source 3 and the power from the in-vehicle battery 10 to the external load 4 based on information input from the input unit 20 by the user. Control the supply.

  Next, FIG. 2 is a flowchart showing the charge / discharge control operation by the control means 110 of FIG. In the figure, when the use schedule of the vehicle 1 is input by the input means 20, the required power amount required when the user uses the vehicle 1 next is calculated based on the use schedule (step). S1). Next, the remaining capacity of the in-vehicle battery 10 (the current capacity of the in-vehicle battery 10 with respect to full charge) is regarded as 0, and the required charging time required to charge the required amount of power is calculated (step S2). The required charging time is calculated by dividing the required power amount by the chargeable amount per unit time.

  Here, the required charge time is calculated by regarding the remaining capacity of the in-vehicle battery 10 as 0, because all the electric power of the in-vehicle battery 10 may be supplied to the external load 4 after calculating the required charge time once. This is also to ensure the time required to charge the required amount of power. That is, by calculating the necessary charging time by regarding the remaining capacity of the in-vehicle battery 10 as 0, even if the electric power of the in-vehicle battery 10 is supplied to the external load after calculating the necessary charging time once, the user can It is possible to avoid a situation in which the remaining capacity of the in-vehicle battery 10 is less than the required capacity at the scheduled start time for starting use, and the convenience for the user can be improved.

  After the required charging time is calculated, the charging start time is calculated based on the planned use of the vehicle 1 and the required charging time (step S3). For example, when the scheduled time when the user next starts using the vehicle 1 is 8:00 am and the required charging time is 7 hours, the charging start time is calculated by calculating back 7 hours from 8:00 am It will be 1am.

  Next, it is determined whether or not the current time has reached the charging start time (step S4), and when it is determined that the charging start time has not been reached, a power request signal from the external load 4 is detected. It is determined whether or not the current time is out of the midnight power time zone (eg, a time zone from 23:00 to 7:00 the next morning) (steps S5 and S6). At this time, when a power request signal from the external load 4 is detected and it is determined that the current time is outside the midnight power time zone, power supply from the in-vehicle battery 10 to the external load 4 is started. (Step S7). On the other hand, when it is determined in step S5 that the power request signal from the external load 4 has not been detected, or in step S6, it is determined that the current time is within the midnight power time zone. The power supply from the in-vehicle battery 10 to the external load 4 is prohibited (step S8). The determination operations in steps S4 to S8 and the determination of starting and prohibiting power supply are repeated until it is determined in step S4 that the current time has reached the charging start time.

  The reason why the power supply is prohibited when the power request signal from the external load 4 is not detected is to prevent the power of the in-vehicle battery 10 from being used indefinitely. For example, when a solar cell panel is installed in a house, the power request signal is generated from the external load 4 when the power generation amount of the solar cell panel is small. The reason for prohibiting power supply when the current time is within the midnight power hours is because it is more economical to use midnight power with priority because the price of commercial power (midnight power) in the midnight power hours is low. is there.

  If it is determined in step S4 that the current time has reached the charging start time, power supply from the in-vehicle battery 10 to the external load 4 is prohibited (step S9), and charging of the in-vehicle battery 10 is started (step S10). ), This charge / discharge control operation is terminated. By prohibiting power supply after the charging start time, it is possible to more reliably avoid a situation in which the remaining capacity of the in-vehicle battery 10 is less than the required capacity at the scheduled use start time when the user uses the vehicle 1. .

  In such a charge / discharge control device 11 for the in-vehicle battery 10, the control means 110 calculates the necessary charge time by calculating the necessary charge time by regarding the remaining capacity of the in-vehicle battery 10 as 0 when calculating the necessary charge time. Even if all the electric power of the in-vehicle battery 10 is supplied to the external load 4 after the calculation once, the time required to charge the required amount of electric power can be reliably ensured. Thereby, even if the electric power of the vehicle-mounted battery 10 is supplied to the external load 4 after calculating the required charging time once, the remaining capacity of the vehicle-mounted battery 10 is the required capacity at the scheduled use start time when the user starts using the vehicle 1. It is possible to avoid the occurrence of a situation that is less than the above, and to improve the convenience for the user.

  Further, the control unit 110 determines the charging start time based on the calculated required charging time, and prohibits the power supply from the in-vehicle battery 10 to the external load 4 after the current time reaches the charging start time. It is possible to more reliably avoid the situation that the remaining capacity of the in-vehicle battery 10 is less than the required capacity at the scheduled time, and the convenience for the user can be improved.

  Furthermore, since the control means 110 prohibits the power supply from the in-vehicle battery 10 to the external load 4 when the current time is within the midnight power time zone, the midnight power can be used preferentially and is borne by the user. Electricity charges can be kept low.

  Furthermore, the control means 110 prohibits the power supply from the in-vehicle battery 10 to the external load 4 when the power request signal from the external load 4 is not detected, so that the power of the in-vehicle battery 10 is used without limitation. Can be prevented, and the efficiency of power use can be improved.

Embodiment 2. FIG.
FIG. 3 is a flowchart showing the charge / discharge control operation performed by the control means 110 of the charge / discharge control apparatus 11 according to the second embodiment of the present invention. In the first embodiment, the charging start time is determined based on the planned use of the vehicle 1 and the required charging time (step S3), and it is determined whether or not the current time reaches the charging start time (step S3). S4). For this reason, depending on the use plan of the vehicle 1, the vehicle-mounted battery 10 may be charged during the day when the electricity charge is relatively high, and the electricity charge borne by the user may be high. In the configuration of the second embodiment, when the in-vehicle battery 10 can be charged with midnight power, the in-vehicle battery 10 is charged with midnight power, thereby lowering the electricity bill borne by the user. It can be so.

  As shown in FIG. 3, the control means 110 of the charge / discharge control apparatus 11 according to the second embodiment determines whether or not charging is possible at midnight power based on the charge start time after determining the charge start time once in step S3. Is determined (step S20). Specifically, the control unit 110 determines whether or not a midnight power time period is included between the current time and the charging start time. Next, when the control means 110 determines that charging is possible with midnight power, the midnight power is calculated by back-calculating the required charging time from the time when the midnight power time ends instead of the scheduled start time of use. The charging start time is re-determined so that charging ends within the time period (step S21). After the charging start time is redetermined, charging / discharging of the in-vehicle battery 10 is controlled based on the redetermined charging start time. Other configurations are the same as those in the first embodiment.

  In such a charging / discharging control device 11 of the vehicle 1, the control means 110 determines the charging start time based on the required charging time so that the charging ends in the late-night power period after calculating the required charging time. Therefore, late-night power can be preferentially used for charging the in-vehicle battery 10, and the electricity bill borne by the user can be kept low.

Embodiment 3 FIG.
FIG. 4 is a flowchart showing a charge / discharge control operation performed by the control means 110 of the charge / discharge control apparatus 11 according to the third embodiment of the present invention. In the first and second embodiments, it has been described that the required charging time is calculated by regarding the remaining capacity of the in-vehicle battery 10 as 0. However, the control unit 110 of the third embodiment is necessary in step S1 as shown in FIG. After calculating the electric energy, the remaining capacity of the in-vehicle battery 10 is detected (step S30), and the required charging time is calculated based on the detected remaining capacity of the in-vehicle battery 10 (step S31). That is, the control means 110 calculates the time required to charge the difference power amount between the detected remaining capacity of the in-vehicle battery 10 and the required power amount as the required charging time.

  In addition, after starting power supply from the in-vehicle battery 10 to the external load 4 in step S7, the control unit 110 returns to step S30 to detect the remaining capacity of the in-vehicle battery 10, and detects the remaining capacity of the in-vehicle battery 10 detected in step S31. The required charging time is calculated again based on the remaining capacity. That is, the control means 110 detects the remaining capacity of the in-vehicle battery 10 when the electric power of the in-vehicle battery 10 is supplied to the external load 4 after calculating the required charging time, and based on the detected remaining capacity of the in-vehicle battery. Update the required charging time. When the necessary charging time is updated, the charging start time is determined based on the updated necessary charging time. Other configurations are the same as those of the second embodiment.

  In such a charge / discharge control device 11 of the vehicle 1, the control means 110 detects the remaining capacity of the in-vehicle battery 10 when the electric power of the in-vehicle battery 10 is supplied to the external load 4 after calculating the necessary charging time. Since the required charging time is updated based on the detected remaining capacity of the in-vehicle battery, even if the electric power of the in-vehicle battery 10 is supplied to the external load 4 after calculating the required charging time once, the user uses the vehicle 1. It is possible to avoid a situation in which the remaining capacity of the in-vehicle battery 10 is less than the required capacity at the scheduled start time for starting use, and it is possible to improve user convenience.

  In Embodiments 1 to 3, it has been described that the charge / discharge control device 11 is mounted on the vehicle 1. However, the charge / discharge control device may be provided separately from the vehicle, for example, provided on the stand 2.

DESCRIPTION OF SYMBOLS 1 Vehicle 4 External load 10 Car-mounted battery 11 Charging / discharging control apparatus 110 Control means

Claims (5)

A charging / discharging control device for an in-vehicle battery that charges the in-vehicle battery and supplies the electric power of the in-vehicle battery to an external load,
While calculating the required charging time based on the information input by the user and the remaining capacity of the in-vehicle battery, comprising a control means for charging the in-vehicle battery based on the calculated required charging time,
The said control means considers the remaining capacity of the said vehicle-mounted battery as 0 when calculating the said required charging time, and calculates the said required charging time. The charging / discharging control apparatus of the vehicle-mounted battery characterized by the above-mentioned. The control means includes
A charging start time is determined based on the calculated required charging time,
Charge and discharge control device of the battery of claim 1 Symbol placement current time and inhibits the supply of power to said external load from said onboard battery after reaching the charging start time. The said control means prohibits the electric power supply from the said vehicle-mounted battery to the said external load, when the present time is in the midnight electric power time zone, The vehicle-mounted battery of Claim 1 or Claim 2 characterized by the above-mentioned. Charge / discharge control device. Wherein when the power request signal from the external load is not detected, any one of claims 1 and inhibits the supply of power to said external load from said onboard battery to claim 3 The on-vehicle battery charge / discharge control device according to claim 1. The said control means determines the charge start time based on the said required charge time so that charge may be complete | finished in the midnight power time slot | zone after calculating the said required charge time. The charging / discharging control apparatus of the vehicle-mounted battery of any one of claim | item 4 .

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