JP2018186631A - Vehicle non-contact charging system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle non-contact charging system which allows setting of a charging state in accordance with preferences of a driver or a driving state in a charging area.SOLUTION: A vehicle non-contact charging system comprises a power receiving part 3 installed in a vehicle 2 which travels by driving an electric motor 6 by power supplied from a battery 8 and a power supply part 5 installed in a prescribed charging area outside of the vehicle 2 and performs non-contact charging from the power supply part 5 to the power receiving part 3. When a charging rate SOC of the battery 8 is lower than a first prescribed value SOC1 and is higher than a second prescribed value SOC, a non-contact charging control unit 20 displays that non-contact charging can be performed by a setting part 14 and performs non-contact charging by a non-contact charging permission switch 14c after a permission operation is performed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle non-contact charging system for charging a rechargeable battery mounted on an electric vehicle.

As a system for charging a rechargeable battery in an electric vehicle such as an electric vehicle, a power receiving device provided in the electric vehicle and a power feeding device provided outside the vehicle are opposed to each other, and the power receiving device and the power feeding device receive power from the power feeding device in a non-contact state. A contactless charging system that supplies power to the device has been proposed.
For example, Patent Document 1 discloses a system in which electric power is supplied in a non-contact state from a power feeding device arranged on a travel route to an electric vehicle that transports luggage, and a rechargeable battery of the electric vehicle is charged. In the non-contact charging system in Patent Document 1, the power feeding device is arranged on the traveling route, and charging is possible not only when the electric vehicle is stopped but also during traveling.

Japanese Patent Laying-Open No. 2015-12638

In recent years, a system for charging a running electric vehicle by installing the above-described power feeding device on a road has been studied. Furthermore, the charging device is arranged in a long section such as an expressway, and charging is possible by traveling at least a part of a section (hereinafter referred to as a charging section) provided with the feeding device. Proposals have been made to increase opportunities.
When charging is performed while traveling in a relatively long charging section in this manner, the battery may be fully charged during traveling in the charging section, and a state of traveling with full charging may occur.

By the way, many electric vehicles enable regenerative power generation in order to suppress the power consumption of the rechargeable battery. Therefore, in a state where the vehicle travels at full charge, braking by regenerative power generation (regenerative braking) becomes impossible, and the braking performance of the electric vehicle may be reduced.
In addition, depending on the driver, there are cases where the preference for the braking performance and the charged state of the electric vehicle is different, such as a person who frequently uses the regenerative brake or a person who wants to maintain the regenerative brake in a state close to full charge even if the regenerative brake is not effective. Further, the necessity of regenerative braking may differ depending on the driving situation, for example, when it is predicted that there will be many downhills and the opportunity to frequently use regenerative braking will increase.

  Accordingly, an object of the present invention is to provide a non-contact charging system for a vehicle that can be set to a charging state that matches a driver's preference and driving situation in a charging section.

  A non-contact charging system for a vehicle according to the present invention is provided in a power receiving unit provided in a vehicle that travels by driving an electric motor with electric power supplied from a rechargeable battery, and in a predetermined charging section outside the vehicle. A non-contact charging system for a vehicle that performs non-contact charging for charging the rechargeable battery by supplying power from the power supply unit to the power receiving unit in a non-contact state. A charge rate detection unit for detecting the charge rate of the battery, a display unit for displaying that the non-contact charge is possible, a charge permission operation unit for performing the non-contact charge permission operation, and a charge rate of the rechargeable battery. A control unit that, when within the predetermined range, displays that the non-contact charging is possible by the display unit, and permits the non-contact charge after being permitted by the charge permission operation unit. It is characterized by that.

Preferably, a charging rate range setting unit for setting the predetermined range is provided.
Preferably, when the charging rate of the rechargeable battery is higher than the predetermined range, the control unit regulates the non-contact charging regardless of the operation of the charging permission operation unit, and the charging rate of the rechargeable battery is If it is lower than the predetermined range, the non-contact charging may be permitted regardless of the operation of the charging permission operation unit.

  Preferably, the predetermined range is lower than a charging rate which is a range lower than full charge.

  According to the present invention, when the charging rate of the rechargeable battery is within the predetermined range, the display unit indicates that non-contact charging is possible, and therefore the charging rate of the rechargeable battery is within the predetermined range. Can be recognized by the driver. And when it is displayed that non-contact charging is possible, the non-contact charging is enabled by the permission operation from the charge permission operation unit, and the non-contact charging is executed when the vehicle is located in the charging section. The As a result, when the charging rate of the rechargeable battery is within a predetermined range, it is possible to select whether or not charging is necessary by operating the driver's charge permission operation unit, and the rechargeable battery of the electric vehicle in the charging section is selected by the driver. It is possible to set the state of charge that suits the user's preference.

It is a lineblock diagram of the non-contact charge system for vehicles of one embodiment of the present invention. It is a flowchart which shows the charge control point by the non-contact charge system for vehicles in the non-contact charge control unit of this embodiment.

Hereinafter, an embodiment of a contactless charging system for a vehicle embodying the present invention will be described.
FIG. 1 is a configuration diagram of a vehicle non-contact charging system 1 according to an embodiment of the present invention.
As shown in FIG. 1, a vehicle non-contact charging system 1 according to an embodiment of the present invention is provided on the ground side of a power receiving unit 3 provided in an electric vehicle (hereinafter referred to as a vehicle 2), a road 4, and the like. Power supply unit 5.

The vehicle 2 is an electric vehicle including an electric motor 6 as a travel drive source.
A battery 8 (rechargeable battery) is mounted on the vehicle 2, and electric power is supplied from the battery 8 to drive the electric motor 6 to drive the vehicle 2.
Furthermore, the vehicle 2 of this embodiment can drive the electric motor 6 during decelerating driving to generate regenerative power, and can charge the battery 8 by this regenerative power generation.

As shown in FIG. 1, the vehicle 2 includes a main control unit 10 for performing comprehensive control of the vehicle. The main control unit 10 controls the operation of the electric motor 6 based on the travel speed of the vehicle 2, the required drive torque, the travel mode changeover switch, and the like.
The power feeding unit 5 is disposed on the upper surface of the road 4 or the like and includes, for example, an electromagnetic coil. The power feeding unit 5 is provided in a relatively long distance section of the road 4 such as a predetermined section of an expressway.

The power receiving unit 3 is provided in the lower part of the vehicle 2 and is disposed facing the road 4. The power receiving unit 3 includes, for example, an electromagnetic coil, and the vehicle 2 is located in a predetermined section (charging section) including the power feeding unit 5, and the power receiving unit 3 and the power feeding unit 5 face each other in a non-contact state. Power is supplied from 5.
For the power feeding unit 5 and the power receiving unit 3, for example, a power feeding circuit and a power receiving circuit in a known non-contact charging system described in International Publication WO2015-068476 may be employed, and detailed description thereof is omitted.

In the vehicle non-contact charging system 1 according to the present embodiment, the vehicle 2 includes an electromagnetically driven switch 12 that opens and closes a power supply line 11 that supplies power from the power receiving unit 3 to the battery 8. The operation of the switch 12 is controlled by the non-contact charge control unit 20 (control unit).
Further, the vehicle 2 is provided with a charging rate measuring unit 13 (charging rate detecting unit) that measures the charging rate SOC of the battery 8 and a setting unit 14 that instructs charging by the vehicle non-contact charging system 1.

  The setting unit 14 includes operation units such as a display unit, a non-contact charge permission switch 14c (charge permission operation unit), and a charge rate setting unit, and is disposed at a position where the driver of the vehicle 2 can visually recognize and operate. The display unit may display, for example, the current charging rate of the battery 8 and whether or not non-contact charging is being performed. The non-contact charging permission switch 14 c is a switch that permits charging of the battery 8 by the vehicle non-contact charging system 1. The charge rate setting unit includes, for example, a charge start charge rate setting unit 14a (charge rate range setting unit) that sets a second predetermined value SOC2 that is a charge rate at which charging is started by contactless charging, and charging by contactless charging. A charging end charging rate setting unit 14b (charging rate range setting unit) for setting a first predetermined value SOC1, which is a charging rate to be stopped, is provided. The first predetermined value SOC1 may be set to a value lower than 100% (full charge), for example, in the vicinity of 80%, and the second predetermined value SOC2 is, for example, in the vicinity of 30%. It may be possible to set a value lower than the first predetermined value SOC1. Moreover, the setting part 14 may be comprised, for example so that a display is possible on the display screen of the navigation system provided in the vehicle 2, and a display part and an operation part may be provided independently.

The non-contact charge control unit 20 is a control device for performing charge control of the battery 8 by the vehicle non-contact charge system 1, and includes an input / output device, a storage device (ROM, RAM, nonvolatile RAM, etc.), central processing A device (CPU) and a timer are included.
The non-contact charge control unit 20 receives the charge rate SOC of the battery 8 from the charge rate measurement unit 13, the setting operation information from the setting unit 14, and the driving information of the vehicle 2 from the main control unit 10, and is displayed on the setting unit 14. And the operation control of the switch 12 is performed.

FIG. 2 is a flowchart showing a charging control procedure by the vehicle non-contact charging system 1 in the non-contact charging control unit 20 of the present embodiment.
The non-contact charge control unit 20 repeatedly executes this control shown in FIG. 2 when the vehicle power is turned on.
As shown in FIG. 2, the non-contact charge control unit 20 first inputs the current charge rate SOC of the battery 8 from the charge rate measurement unit 13 in step S <b> 10. Then, the process proceeds to step S20.

In step S20, it is determined whether or not the charging rate SOC input in step S10 is equal to or greater than a first predetermined value SOC1. When the charging rate SOC is equal to or greater than the first predetermined value SOC1, this routine ends. If the charging rate SOC is less than the first predetermined value SOC1, the process proceeds to step S30.
In step S30, it is determined whether or not the charging rate SOC input in step S10 is equal to or less than a second predetermined value SOC2. If it is equal to or smaller than the second predetermined value SOC2, this routine is terminated. If the charging rate SOC is greater than the second predetermined value SOC2, the process proceeds to step S40.

In step S40, the display unit of the setting unit 14 displays that non-contact charging is possible. At this time, the charging rate SOC may be displayed on the display unit. Then, this routine ends.
In addition to the control shown in FIG. 2, the non-contact charging control unit 20 turns off the switch 12 when the charging rate SOC of the battery 8 input from the charging rate measuring unit 13 is equal to or higher than the first predetermined value SOC1. Thus, charging by the vehicle non-contact charging system 1, that is, non-contact charging is regulated. Further, the non-contact charge control unit 20 enables the contactless charging by turning on the switch 12 regardless of the operation of the non-contact charge permission switch 14c when the charging rate SOC is less than the first predetermined value SOC1.

  By controlling as described above, in the present embodiment, it is notified that charging is possible in a predetermined range where the charging rate SOC of the battery 8 is less than the first predetermined value SOC1 and larger than the second predetermined value SOC2. . And a driver | operator operates the non-contact charge permission switch 14c, non-contact charge is attained, and if the vehicle 2 is located in a charge area, charge will be performed. Thus, in a predetermined range where the charging rate SOC of the battery 8 is less than the first predetermined value SOC1 and larger than the second predetermined value SOC2, the driver can select whether or not to perform contactless charging. For example, when the driver operates the non-contact charge permission switch 14c when the chargeable display is displayed in the charge section, the charge rate SOC of the battery 8 can be increased to the first predetermined value SOC1. If the driver does not operate the non-contact charging permission switch 14c when the chargeable display is displayed, the charging rate SOC of the battery 8 can be reduced to the second predetermined value SOC2 by power consumption.

Thus, since the driver can set the charging rate SOC of the battery 8 to be maintained in the charging section where non-contact charging is possible, for example, a driver who frequently uses the regenerative brake or a regenerative brake which has many downhills If it is expected that there are many opportunities to perform charging, the charging rate SOC of the battery 8 is reduced to the first predetermined value SOC1 without operating the non-contact charging permission switch 14c when the chargeable indication is displayed, and the regenerative braking is performed. It becomes possible to use many. In addition, when a driver who uses the regenerative brake less frequently or when it is expected that there are many uphills, the non-contact charge permission switch 14c is operated to display the charge rate SOC of the battery 8 when the chargeable display is displayed. It can be raised to the first predetermined value SOC1. Therefore, the charging rate SOC of the battery 8 can be kept high during traveling in the charging section, and the output of the electric motor 6 can be secured to improve traveling performance on an uphill or high-speed traveling. Further, by maintaining the charging rate SOC of the battery 8 high during traveling in the charging section, it is possible to increase the travelable distance of the vehicle 2 by the electric motor 6 after the traveling in the charging section is completed.

As described above, in the electric vehicle 2 of the present embodiment, the battery 8 of the vehicle 2 can be in a charged state that matches the driver's preference and road conditions in the charging section.
Further, since the driver can change the first predetermined value SOC1 and the second predetermined value SOC2, for example, by setting the first predetermined value SOC1 high, the charging rate of the battery 8 within the charging period is set, for example. It becomes possible to maintain the SOC closer to full charge. Further, by setting the second predetermined value SOC2 low, it is possible to keep the charging rate of the battery 8 lower in the charging period. In this way, it becomes possible to adapt more widely to the driver's preference.

In addition, this invention is not limited to embodiment mentioned above.
For example, at least one of the first predetermined value SOC1 and the second predetermined value SOC2 may be a fixed value.
Further, the non-contact charge control unit 20 may be controlled so as to automatically change the first predetermined value SOC1 and the second predetermined value SOC2. For example, when it is determined from the travel route and road information from the navigation system of the vehicle 2 that there are many downhills in the subsequent travel route of the vehicle, the first predetermined value SOC1 and the second predetermined value SOC2 are automatically set. When it is determined that there are many uphills, the first predetermined value SOC1 and the second predetermined value SOC2 may be automatically set high. Further, the first predetermined value SOC1 and the second predetermined value SOC2 may be automatically set based on the frequency of the past regenerative braking. If it does in this way, in non-contact charge, it will become possible to make it into the charge state suitable for a road condition and a driver | operator's preference easily.

In addition, the chargeable display by the display unit in the setting unit 14 may be displayed only when the vehicle 2 is located in the charging section, or may be displayed outside the charging section and before entering the charging section in advance. Operation information of the operated contactless charging permission switch 14c may be stored, and the operation control of the switch 12 may be performed within the charging section.
Moreover, in the said embodiment, although this invention is employ | adopted for the electric vehicle, this invention is applicable also to the hybrid vehicle which has an engine. The present invention can be widely applied to an electric vehicle including a power receiving device of a non-contact charging system that can be charged while the vehicle is running.

DESCRIPTION OF SYMBOLS 1 Non-contact charging system for vehicles 2 Vehicle 3 Power receiving part 5 Power feeding part 8 Battery (rechargeable battery)
13 Charging rate measurement unit (charging rate detection unit)
14 Setting part (display part)
14a Charging start charging rate setting unit (charging rate range setting unit)
14b Charging end charging rate setting unit (charging rate range setting unit)
14c Non-contact charge permission switch (charge permission operation part)
20 Non-contact charge control unit (control unit)

Claims (4)

A power receiving unit provided in a vehicle that travels by driving an electric motor with electric power supplied from a rechargeable battery, and a power feeding unit provided in a predetermined charging section outside the vehicle, from the power feeding unit A vehicle non-contact charging system that performs non-contact charging for supplying power to the power receiving unit in a non-contact state to charge the rechargeable battery,
A charge rate detector for detecting a charge rate of the rechargeable battery;
A display unit for displaying that the contactless charging is possible;
A charge permission operation unit for performing the contactless charge permission operation;
When the charge rate of the rechargeable battery is within a predetermined range, the display unit displays that the non-contact charge is possible, and the non-contact charge is permitted after the permit operation is performed by the charge permission operation unit. A control unit;
A vehicle non-contact charging system comprising:   The vehicle non-contact charging system according to claim 1, further comprising a charging rate range setting unit that sets the predetermined range. The controller is
Regulating the non-contact charging regardless of the operation of the charging permission operation unit when the charging rate of the rechargeable battery is higher than the predetermined range, and charging when the charging rate of the rechargeable battery is lower than the predetermined range. The vehicle non-contact charging system according to claim 1 or 2, wherein the non-contact charging is permitted regardless of an operation of the permission operation unit.   The non-contact charging system for a vehicle according to any one of claims 1 to 3, wherein the predetermined range is a range lower than a full charge.

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