JP5081780B2 - Electric vehicle charging control device - Google Patents

Description

  The present invention relates to an electric vehicle charging control apparatus.

Conventionally, as a method for charging a battery of an electric vehicle, in addition to a method of removing the battery from the vehicle body and charging the battery using a charger outside the vehicle, the charger is mounted on the vehicle together with the battery, and the battery is mounted on the vehicle. There is a method of charging with. In the latter case, in order to enable charging from a commercial power source, the vehicle body is provided with a power input unit including a commercial power source plug connector (plug receptacle or plug plug) or the like (for example, see Patent Document 1). .)
JP 2007-267561 A

By the way, in the conventional configuration, when a plurality of electric vehicles are owned and used for business purposes or the like, a situation where a plurality of vehicles are simultaneously connected to a single charging stand installed in the parking lot can be considered. In this case, a large number of power output units are required in the central control panel of the charging stand, and many relatively long charging cables are arranged between the central control panel and each vehicle. There is a problem of affecting the cost, usability and appearance.
Also, if the capacity of the central control panel is limited, connecting multiple vehicles at the same time will reduce the amount of current supplied to each vehicle evenly. There is a problem that it takes time to complete charging.
Therefore, the present invention provides a charging control device for an electric vehicle, wherein the number of vehicles around the central control panel can be simultaneously connected to the central control panel while suppressing the influence on the cost, usability and appearance around the central control panel. It aims at enabling efficient charge according to the battery remaining amount of vehicles.

As a means for solving the above-mentioned problem, the invention described in claim 1 includes a power input unit (for example, the power input unit 5 of the embodiment) for inputting power from the outside of the vehicle, and the power input from the power input unit. Based on the battery (for example, the battery 6 of the embodiment) to be stored, the motor (for example, the motor 7 of the embodiment) for obtaining the driving force of the vehicle based on the power supplied from the battery, and the power input from the power input unit In the charging control device for an electric vehicle provided with a charging control unit (for example, the charging control unit 8 in the embodiment) that performs charging control on the battery, the electric vehicle automatically receives the electric power input from the electric power input unit. with the power output for output to other than a vehicle (e.g., power output unit 9 in the embodiment), the central control panel for controlling the power supplied to the electric vehicle from outside the vehicle power supply (for example, a central system of example The panel 10) confirms the remaining battery level of each electric vehicle when a plurality of the electric vehicles are connected, selects a vehicle to be charged preferentially according to the remaining battery level, After determining the current value to be supplied to the electric vehicle and completing the charging of the vehicle to be preferentially charged, if there is a vehicle that has not been fully charged, the current value to be supplied to the vehicle is determined. It is characterized by that.

The invention described in claim 2 is characterized in that the central control panel confirms a remaining battery level in the electric vehicle via a power supply path (for example, the charging cable 12 of the embodiment) to the electric vehicle. .

The invention described in claim 3 is characterized in that the charge control unit can charge the battery of the other vehicle from the battery of the own vehicle via the power input unit and the power output unit.

The invention described in claim 4 is characterized in that the electric vehicle is a saddle-ride type vehicle, and both the power input unit and the power output unit are provided under a seat (for example, the seat S of the embodiment).

According to the invention described in claim 1, it is possible to connect a plurality of electric vehicles using a relatively short charging cable, and there are many relatively long charging cables between the central control panel and the plurality of vehicles. Compared with the case where it distributes, it is possible to connect and charge a plurality of vehicles to the central control panel at the same time, while suppressing the cost, usability and appearance of the central control panel.
According to the first aspect of the present invention, charging is efficiently performed according to the remaining battery levels of a plurality of electric vehicles, such as completing charging sequentially from an electric vehicle having a large remaining battery capacity, or simultaneously completing charging of each electric vehicle. It can be performed.
According to the first aspect of the present invention, charging can be quickly completed with priority from a vehicle having a large remaining battery level.
According to the invention described in claim 1, while successively determining the vehicle to be fully charged with priority, a plurality of vehicles can be rapidly charged completed.
According to the second aspect of the present invention, no special wiring or the like is required to check the remaining battery level, and the device can be reduced in weight and size.
According to the invention described in claim 3 , regardless of the power supplied from the central control panel, for example, even when the battery of the host vehicle runs out at the destination, the host vehicle is charged with the power from the other vehicle. be able to.
According to the fourth aspect of the present invention, it is possible to easily and easily ensure accessibility and waterproofness to the power input unit and the power output unit for electrical connection.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is an explanatory diagram showing a connection form of the charging control apparatus for an electric vehicle according to this embodiment. As shown in the figure, the power output unit 11 of the central control panel 10 in a charging stand or the like installed in a parking lot. A plurality (for example, four) of electric vehicles (hereinafter simply referred to as vehicles) 1 to 4 are connected in series via the charging cable 12.

  Each of the electric vehicles 1 to 4 is a saddle-ride type vehicle such as a two-wheel or three-wheel vehicle, and a plurality of electric vehicles are simultaneously owned and used as a delivery vehicle such as a mail or a newspaper at a single office. Each of these electric vehicles 1 to 4 has an electric power input unit 5 for inputting electric power from the outside of the vehicle, a battery 6 (see FIG. 2) for storing electric power input from the electric power input unit 5, and a supply from the battery 6 A motor 7 that obtains the driving force of the vehicle based on the generated power, a charge control unit 8 (see FIG. 2) that performs charge control for the battery 6 based on the power input from the power input unit 5, and the power input unit And a power output unit 9 for outputting the power input from 5 to other than the host vehicle.

  The electric vehicles 1 to 4 are arranged in order from the side closer to the central control panel 10 and the side farther from the central control panel 10. The electric power input unit 5 of the vehicle 1 closest to the charging stand is connected to the electric power output unit 11 of the central control panel 10. Is connected to the power output unit 9 of the vehicle 1, the other end of the charging cable 12 is connected to the power input unit 5 of the vehicle 2, and the power output of the vehicle 2 is connected. The other end of the charging cable 12 whose one end is connected to the unit 9 is connected to the power input unit 5 of the vehicle 3, and the other end of the charging cable 12 whose one end is connected to the power output unit 9 of the vehicle 3 is the power of the vehicle 4. Connected to the input unit 5.

  The power input unit 5 and the power output unit 9 are each configured by, for example, plug receptacles of plugs for commercial power (AC 100 V), and plugs corresponding to these plug plugs are provided at both ends of the charging cable 12, respectively. In addition to supplying power to each of the vehicles 1 to 4, the charging cable 12 serves as an information communication line between the control block 8 a of the charging control unit 8 of each of the vehicles 1 to 4 and the central control block 10 a of the central control panel 10. Also works. That is, the communication line between the control blocks 8a and 10a physically shares a power supply line for charging, and the power output unit 11 of the central control panel 10 is connected to the vehicles 1 to 4 via the charging cable 12. Communication between the central control panel 10 and each of the vehicles 1 to 4 is possible only by connecting the power input unit 5.

  The power input unit 5 and the power output unit 9 of each vehicle 1 to 4 are disposed, for example, under the seat S for occupant seating, and when the charging cable 12 is connected to these, the seat S is displaced by opening and closing the hinge or the like. Can be easily accessed, and can be protected from disturbances by locking the sheet S when not in use, and can be waterproof when it rains or is washed.

  As shown in FIG. 2, the central control panel 10 includes a central power supply block 10b having a function as an AC-DC converter that converts direct current power (AC 100V) supplied from the main power line, and power from the central power supply block 10b. The output unit 11 and the central control block 10a for controlling the amount of current supplied to each of the vehicles 1 to 4 are provided.

  On the other hand, the charging control unit 8 of each of the vehicles 1 to 4 is provided on a branch wiring from the wiring between the power input unit 5 and the power output unit 9 to the battery 6 that is a vehicle-mounted power source, and functions as a DC-DC converter. And a control block 8a for issuing a charge command to the power conversion block 8b. The control block 8a obtains the current value (received current value) of the power supplied to the power input unit 5 and determines the remaining battery level (SOC (State of Charge)). Acquire and communicate with the central control block 10a such as a remaining battery level and a charge command.

Here, the charging control apparatus of this embodiment completes charging in order from the vehicle with the largest remaining battery level (full charging).
Specifically, in the case where four vehicles 1 to 4 are connected in series to the central control panel 10 as described above, first, the central control block 10a selects the vehicle with the largest remaining battery capacity, In order to charge the vehicle with the maximum current that can be charged, the maximum value is output to the control block 8a of the vehicle as the first charge command value. At this time, if the first charging command value exceeds the wiring current capacity which is the maximum capacity of the central control panel 10, control is performed so that charging is performed with a current within the range of the wiring current capacity.

  Next, the central control block 10a selects a vehicle having the second largest remaining battery level, and uses the maximum value as the second charge command value to charge the vehicle with the maximum current that can be charged. Output to 8a. At this time, if the sum of the first and second charging command values exceeds the wiring current capacity, control is performed to perform charging with a current within the range of the wiring current capacity.

  Furthermore, the central control block 10a selects a vehicle having the third remaining battery level, and uses the maximum value as the third charge command value to charge the vehicle with the maximum current that can be charged. Output to 8a. At this time, if the sum of the first to third charging command values exceeds the wiring current capacity, control is performed to perform charging with a current within the range of the wiring current capacity.

  Similarly, the central control block 10a selects the vehicle with the fourth largest remaining battery level, and controls the vehicle with the maximum value as the fourth charge command value in order to charge the vehicle with the maximum current that can be charged. Output to block 8a. At this time, if the sum of the first to fourth charging command values exceeds the wiring current capacity, control is performed to charge with a current within the range of the wiring current capacity.

  When the charging of the first vehicle with the remaining battery level is completed, the second and subsequent vehicles are moved up to calculate the charging command value again, and the charging is completed preferentially one by one.

Hereinafter, an example of the processing procedure of the central control block 10a will be described with reference to the flowchart of FIG. This process is repeatedly executed every predetermined time.
Assuming that the four vehicles 1 to 4 are connected in series to the central control panel 10 as described above, first, the current capacity (suppliable capacity) that can be supplied from the central power supply block 10b to the power output unit 11 is set. The wiring current capacity, which is the maximum capacity of the central control panel 10, is set, and the coefficient n is set to “1” (step S1).

  Next, the remaining battery level of each vehicle 1 to 4 is acquired from the control block 8a of each vehicle 1 to 4 through the power supply line (step S2), and the vehicle M having the nth remaining battery level is selected based on the acquired information. (Step S3). That is, in the first round of processing, the vehicle with the largest remaining battery capacity is selected.

  Next, the charge command value commanded from the control block 8a to the power conversion block 8b in the vehicle M selected in step S3 is converted into the maximum chargeable value between the power conversion block 8b and the battery 6, or the supplyable capacity is converted into current. The value divided by the rate (coefficient associated with loss due to wiring or internal resistance of the battery 6) is determined to be smaller, and the charge command value divided by the current conversion rate is subtracted from the available capacity. The set value is set as a new supplyable capacity (step S4).

Then, the charging command value determined in step S4 is commanded to the control block 8a of the vehicle M selected in step S3 (step S5), and the battery 6 is charged based on the charging command value in the vehicle M. .
Thereafter, the process proceeds to step S6, and it is determined whether or not the new supplyable capacity set in step S4 is larger than 0 (whether or not the current capacity that can be supplied to other vehicles remains).

  When the determination result is YES (when the supplyable capacity is larger than 0), the process proceeds to step S7, 1 is added to the coefficient n to set a new coefficient n, and the processing from step S3 is repeated. . That is, in step S3, if the process is the second order, the vehicle having the second highest remaining battery capacity is selected, and if the process is the third order, the vehicle having the third remaining battery capacity is selected. In the case of eye processing, a vehicle with the fourth largest remaining battery capacity is selected.

  Thereafter, the processes in steps S4 to S6 are repeated, and if the determination result in step S6 is NO (when the supplyable capacity becomes 0), the process proceeds to step S8, and if there are remaining vehicles, control of the vehicles is performed. A charge command value 0 is commanded to the block 8a (that is, a command not to charge).

  As a result, the supply current can be concentrated on the vehicle having the most remaining battery power and charging can be completed in the shortest time. When the control block 8a of the vehicle detects the completion of charging, power is not received by opening the circuit of the power supply block 8b of the host vehicle. In addition, the central control block 10a that has detected the completion of charging performs the processes of steps S1 to S8 for the remaining vehicles when there are remaining vehicles.

  In addition, when there are a plurality of vehicles having the same remaining battery level, for example, the priority order is determined in the order of vehicle IDs, the order of connection to the central control panel 10, or the order close to the central control panel 10, and the like. The charging should be completed preferentially one by one.

  As described above, the charging control device for an electric vehicle in the above embodiment includes the power input unit 5 for inputting power from the outside of the vehicle, the battery 6 for storing the power input from the power input unit 5, and the An electric motor including a motor 7 that obtains a driving force of the vehicle based on electric power supplied from the battery 6 and a charge control unit 8 that performs charge control on the battery 6 based on electric power input from the electric power input unit 5. In the vehicle 1 to 4, the electric vehicle includes a power output unit 9 for outputting the power input from the power input unit 5 to other than the own vehicle.

  According to this configuration, a plurality of electric vehicles can be connected using a relatively short charging cable 12, and a relatively long charging cable is arranged between the central control panel 10 and the plurality of vehicles. Compared to the case, it is possible to simultaneously connect and charge a plurality of vehicles to the central control panel 10 while suppressing the influence on the cost, usability and appearance around the central control panel 10.

  The charging control apparatus includes a central control panel 10 that controls power supplied from an external power source to the electric vehicle. When the plurality of electric vehicles are connected to the central control panel 10, the central control panel 10 Since the battery remaining amount of each electric vehicle is confirmed and the current value to be supplied to each electric vehicle is determined, charging is completed sequentially from the electric vehicle with the largest remaining battery amount, or each electric vehicle is charged simultaneously. Efficient charging can be performed according to the remaining battery capacity of a plurality of electric vehicles, such as completion.

  Furthermore, in the charging control device, the central control panel 10 to which a plurality of the electric vehicles are connected should check the remaining battery level of each electric vehicle and complete the charging with priority according to the remaining battery level. Since the current value to be supplied to each electric vehicle is determined after the vehicle is selected, the charging can be completed promptly with priority from the vehicle with a large remaining battery level.

  In addition, the charge control device, when the central control panel 10 has completed the charging of the vehicle that should be preferentially charged, and there is a vehicle that has not been fully charged, the current supplied to the vehicle Since the value is determined again, it is possible to quickly complete the charging of a plurality of vehicles while sequentially determining the vehicles that should be charged with priority.

  Furthermore, in the charging control device, the central control panel 10 is configured to check the remaining battery level in the electric vehicle via a power supply path (such as the charging cable 12) to the electric vehicle. No special wiring or the like is required to confirm the above, and the device can be reduced in weight and size.

  In addition, in the charging control device, the electric vehicle is a saddle-ride type vehicle, and the power input unit 5 and the power output unit 9 are both provided under the seat S, so that the Accessibility, waterproofness, and the like for the power output unit 9 can be ensured simultaneously and easily.

Next, a second embodiment of the present invention will be described.
The charge control device of this embodiment differs from the first embodiment in that all vehicles are completely charged at the same time regardless of the remaining battery level.

  Now, assuming that four vehicles 1 to 4 are connected in series to the central control panel 10, the charge command values 1 to 4 that the central control block 10a commands the control blocks 8a of the vehicles 1 to 4 are: Based on the remaining battery levels 1 to 4 of the vehicles 1 to 4, it is described as shown in Equation 1 below.

  On the other hand, the supply current amount from the central control panel 10 is described as shown in Equation 2 below.

  If the charging command values 1 to 4 are determined so that the supply current amount is the wiring current capacity that is the maximum capacity of the central control panel 10, the vehicles 1 to 4 are charged in the shortest and the same charging time. be able to. That is, the charging time is described as shown in Equation 3 below.

  Finally, by substituting the charging time obtained in Equation 3 above into Equation 1, charging command values 1 to 4 that the central control block 10a commands the control blocks 8a of the vehicles 1 to 4 are determined. By charging the vehicles 1 to 4 based on the charging command values 1 to 4, the charging of the vehicles 1 to 4 can be completed in the shortest and same charging time as described above. The processing procedure of the central control block 10a in this embodiment is shown in steps S11 to S14 in the flowchart of FIG.

Next, a third embodiment of the present invention will be described.
This embodiment differs from the first embodiment in that charging is completed in order from a vehicle far from the central control panel 10.

  Now, assuming that four vehicles 1 to 4 are connected in series to the central control panel 10, the central control block 10 a first detects the received current values 1 to 4 for the vehicles 1 to 4. Each received current value 1 to 4 is described as shown in Equation 4 below.

  In other words, the vehicle 4 having the smallest received current value is the farthest from the central control panel 10, and then approaches the central control panel 10 in the order of decreasing received current value (in the order of vehicles 3, 2, 1). . Based on the magnitude of the received current value, the central control block 10a can determine the distance on the connection of each vehicle 1 to 4 to the central control panel 10.

  Based on the determination result, the charging command value is determined as shown in step S4 of FIG. 3, and the supply current can be concentrated on the vehicle 4 farthest from the central control panel 10 to complete the charging in the shortest time.

  As a result, even when a plurality of vehicles are connected in series to the central control panel 10, it becomes possible to preferentially fully charge from the vehicle located at the connection end, and the vehicle in the middle of connection can be pulled out and It is possible to eliminate the trouble of reconnecting the vehicles or inserting the vehicles in the middle of the connection and connecting them to the vehicles on both sides thereof, thereby improving convenience.

  Note that the present invention is not limited to the above-described embodiments. For example, in each of the above-described embodiments, as a countermeasure when the current conversion rate changes due to a change in battery voltage during charging, for example, the current conversion rate In consideration of this change, the calculation may be made in advance with a smaller wiring current capacity, or the received current value of each vehicle may be detected and the charge command value may be corrected using the received current value.

Further, the charging control unit 8 of each vehicle 1 to 4 can charge the battery 6 of the other vehicle from the battery 6 of the own vehicle via the power input unit 5 and the power output unit 9. That is, even if the vehicle is not connected to the central control panel 10, one end of the charging cable 12 is connected to the power output portion 9 of the vehicle corresponding to full charge, and the other end of the charging cable 12 is connected to the power input of the vehicle with a small remaining battery level By connecting to the unit 5, the charging control unit 8 of each vehicle can supply power from one to the other in order to equalize the remaining battery power.
Thereby, for example, even when the battery of the host vehicle runs out at the destination, the host vehicle can be charged with electric power from another vehicle, and each vehicle can return to the parking lot by itself. This is highly effective in a case where a plurality of vehicles travel within a certain range, such as a delivery vehicle such as mail or newspaper.

  And the structure in the said Example is an example of this invention, and it cannot be overemphasized that a various change is possible in the range which does not deviate from the summary of the said invention.

It is explanatory drawing which shows the connection form of the charge control apparatus in the Example of this invention. It is a block diagram of the said charge control apparatus. It is a flowchart which shows the process sequence of the central control block of the said charge control apparatus. It is a flowchart which shows the process sequence of the central control block of the charge control apparatus in 2nd Example of this invention.

Explanation of symbols

1 to 4 Electric vehicle 5 Power input unit 6 Battery 7 Motor 8 Charge control unit 9 Power output unit 10 Central control panel 12 Charging cable (power supply path)
S sheet

Claims (4)

Based on a power input unit (5) for inputting power from the outside of the vehicle, a battery (6) for storing power input from the power input unit (5), and power supplied from the battery (6) An electric vehicle (7) having a motor (7) for obtaining a driving force of the vehicle and a charge control unit (8) for performing charge control on the battery (6) based on the electric power input from the electric power input unit (5) In the charge control device for 1-4),
The electric vehicle (1 to 4) includes a power output unit (9) for outputting the power input from the power input unit (5) to other than the own vehicle ,
When the central control panel (10) for controlling the power supplied from the external power source to the electric vehicles (1 to 4) connects the plurality of electric vehicles (1 to 4), the electric vehicles (1 to 4). After checking the remaining amount of the battery and selecting a vehicle to be charged with priority according to the remaining amount of the battery, the current value to be supplied to each of the electric vehicles (1 to 4) is determined and prioritized. An electric vehicle charge control device that determines a current value to be supplied to a vehicle when there is a vehicle that has not been fully charged after charging of the vehicle to be charged is completed . The central control panel (10), through said power supply path to the electric vehicle (1-4), according to claim 1, characterized in that to check the battery remaining amount in said electric vehicle (1-4) Electric vehicle charge control device. The charge control unit (8) can charge the battery (6) of another vehicle from the battery (6) of the own vehicle via the power input unit (5) and the power output unit (9). The charging control device for an electric vehicle according to claim 1 or 2 . It said electric vehicle (1-4) is a saddle type vehicle, one of the power input unit (5) and the power output unit (9) from claim 1, characterized in that the to be both provided under the seat 3 The charge control device for an electric vehicle according to item 1.

Images