JP5081783B2 - Vehicle charging system - Google Patents

Description

  The present invention relates to a charging system for a vehicle such as an electric vehicle.

For a vehicle such as a hybrid vehicle or an electric vehicle equipped with a secondary battery, a charging system that can be charged from an external power source of the vehicle, such as a plug-in type charging system, is known.
In this type of charging system, a charging system has been proposed in which a primary coil is embedded in a parking space and a secondary coil is provided on the vehicle side to charge a secondary battery in a contactless manner during parking. (For example, refer to Patent Document 1).
JP-A-8-126120

However, since the conventional vehicle charging system described above is configured to supply electric power in a non-contact manner by electromagnetic coupling between the primary coil and the secondary coil, it is used in the vehicle by the magnetic field radiated from the primary coil. There is a problem that it may adversely affect wireless communication.
This invention is made in view of the said situation, and provides the charging system of the vehicle which can prevent the bad influence to the radio | wireless communication utilized with a vehicle.

In order to solve the above-described problem, the invention described in claim 1 is directed to a primary coil (for example, a vehicle-side external device (for example, the parking equipment side charging device 2 in the embodiment)) provided outside the vehicle. Secondary coil for performing non-contact charging from secondary coil (for example, in-vehicle battery 25 in the embodiment) mounted on a vehicle (for example, vehicle 3 in the embodiment) from loop coil 6 in the embodiment (For example, the coil 5 in the embodiment), and a control means (for example, vehicle-side charging in the embodiment) that transmits a charge start request signal and a charge stop request signal to the vehicle external device when a predetermined condition is satisfied. a vehicle charging system provided with a control unit 24), locking operation from the portable terminal by radio communication with a capable locking device, the control means, the door lock of the vehicle Until, the charging start request signal with prohibited from transmitting to the vehicle external device, when the door of the vehicle is locked, the secondary and the primary coil by the energization of the primary coil The charging start request signal is transmitted to the vehicle external device in a non-contact manner through a side coil .

The invention described in claim 2 is based on a primary coil (for example, the loop coil 6 in the embodiment) of a vehicle external device (for example, the parking equipment side charging device 2 in the embodiment) provided outside the vehicle. A secondary coil (for example, coil 5 in the embodiment) for performing non-contact charging on a secondary battery (for example, in-vehicle battery 25 in the embodiment) mounted on the vehicle (for example, vehicle 3 in the embodiment). The vehicle is equipped with control means (for example, the vehicle-side charge control device 24 in the embodiment) that transmits a charge start request signal and a charge stop request signal to the vehicle external device when a predetermined condition is satisfied. In the system, the control means outputs the charge stop request signal when the unlocking of the door of the vehicle or the opening of the door of the vehicle is detected during charging. And transmitting to the two outer devices.
The invention described in claim 3 is characterized in that the locking device transmits and receives a security code by a locking operation of the mobile terminal, and locks and unlocks the door of the vehicle based on the transmission and reception of the security code. .
The invention described in claim 4 is characterized in that the vehicle starts an engine based on a communication result by transponder communication of an immobilizer.
According to a fifth aspect of the present invention, when the control means includes an automatic charging permission switch, the door of the vehicle is locked, and the automatic charging permission switch is ON, the charge start request signal is transmitted to the vehicle. It transmits to an external device.

  According to the invention described in claim 1, for example, the vehicle is parked in a predetermined parking space or the like, the door is opened and closed for the user to get off, and the security code is provided to lock the door. When a locking operation is performed using a keyless entry or a smart key to be transmitted, the control means transmits a charge start request signal to the vehicle external device to start supplying power for charging the secondary battery to the vehicle. Therefore, since the magnetic field is not radiated from the primary coil when the security code is transmitted when locking, the reception of the security code on the vehicle side can be prevented from being disturbed. This has the effect of improving security during parking.

  According to the second aspect of the present invention, when at least one of unlocking of the vehicle door or opening of the vehicle door by the user is detected during charging, the charge stop request signal is transmitted to the vehicle external device. Therefore, when at least one of unlocking the door or opening the door is detected, the charging is stopped. For example, when starting the engine, the transponder communication of the immobilizer or other in-vehicle communication And the like can be reliably prevented from being hindered by the electromagnetic field during charging.

Next, a vehicle charging system according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a schematic configuration of a charging system 1 according to this embodiment, and mainly includes a parking facility side charging device 2 provided outside a vehicle, a vehicle side charging device 4 mounted on a vehicle 3, and a non-contact type. The coil 5 (secondary side coil) and the loop coil 6 (primary side coil) for transmitting and receiving electric power are provided. The vehicle 3 is equipped with a coil 5 and a vehicle-side charging device 4, and an in-vehicle battery 25 that is a secondary battery mounted on the vehicle 3 when a current flows through the coil 5 by electromagnetic coupling (see FIG. 2). Can be charged.

  The parking facility side charging device 2 is provided in a parking facility such as a coin parking, to which a loop coil 6 is connected. The loop coils 6 are each installed or embedded in a parking space defined in the parking facility, and are configured to generate a magnetic field by a predetermined energization. The loop coil 6 detects the approach of the vehicle to the parking space and performs non-contact power transfer and data transmission / reception with the coil 5 provided on the vehicle side.

  Moreover, the parking facility side charging device 2 has a power supply device 10, a facility side charging control device 11, a tuning circuit 12, a transmission circuit 13, and a reception circuit as shown in FIG. A circuit 14 is provided.

  The power supply device 10 is a device that is connected to an external commercial power supply or the like and supplies power used by the parking facility side charging device 2, and supplies driving power to the facility side charging control device 11. In addition, the power supply device 10 includes an oscillation circuit 15 and energizes the loop coil 6 with a current having a predetermined frequency based on a control command from the facility-side charge control device 11. Furthermore, the power supply device 10 compares the comparatively small current set to the vehicle detection frequency (for example, about 150 to 160 kHz) and the charging frequency (for example, about 130 kHz) as the current of the predetermined frequency. Large currents can be output. The magnitude of the current can be adjusted by the pulse width or the like.

The tuning circuit 12 is optimized by changing the setting of the frequency band (for example, about 130 to 160 kHz) used for input / output of the loop coil 6 according to the circuit configuration of the tuning circuit 20 and the coil 5 on the vehicle side described later. It adjusts based on the control command of the installation side charge control apparatus 11.
The transmission circuit 13 transmits a signal such as a synchronization signal to the vehicle side charging device 4 via the loop coil 6 based on the control command of the facility side charging control device 11. The synchronization signal includes a charging code indicating that charging is possible in the parking space.
When a current for vehicle detection is output from the power supply device 10, the reception circuit 14 receives a voltage change due to a magnetic field change of the loop coil 6 as a vehicle detection signal, detects the entry of the vehicle 3, and transmits the signal. When the synchronization signal is transmitted by 13, the synchronization / activation code signal (response signal) transmitted from the vehicle side is received, and the received signal is output to the facility-side charge control device 11.

  The facility-side charge control device 11 detects the entry of the vehicle 3 into the parking space based on the reception result of the reception circuit 14 when the vehicle detection current is supplied from the power supply device 10 to the loop coil 6. To do. Further, when the entry of the vehicle 3 is detected, a synchronization signal is output to the vehicle 3 that has entered via the transmission circuit 13.

  Furthermore, the facility-side charging control device 11 includes a switching control unit 16 that switches and controls the output of the power supply device 10 to appropriately change the current output to the loop coil 6. 3 is detected, and when a predetermined charging condition is satisfied, the switching control unit 16 performs control to switch the current output from the power supply device 10 from the vehicle detection current to the charging current. Further, the facility-side charge control device 11 calculates the charge amount to the in-vehicle battery 25 of the vehicle 3 based on the time when the switch control unit 16 switches to the charging current and the energization amount at that time. The amount information is configured to be output to a settlement apparatus 17 that performs the settlement of the coin parking fee.

  In addition to the information on the amount of charge described above, the settlement apparatus 17 is configured such that a detection signal for detecting the entry of the vehicle 3 is input from the facility-side charge control apparatus 11. When the detection signal is input, the settlement apparatus 17 outputs a control command to the drive mechanism 19 of the lock plate 18 in order to raise the lock plate 18 that restricts the delivery of the vehicle 3 after a predetermined time. Further, when the user's checkout procedure is properly completed at the time of delivery, a control command is output to the drive mechanism 19 so as to lower and release the lock plate 18 to permit the delivery of the vehicle 3.

On the other hand, the vehicle side charging device 4 includes a tuning circuit 20, a receiving circuit 21, a transmission circuit 22, a charging circuit 23, a vehicle side charging control device 24, and an in-vehicle battery 25. A coil 5 installed at a position capable of electromagnetic coupling is connected to the loop coil 6 such as the lower surface of the floor panel.
The tuning circuit 20 constitutes a so-called resonance circuit that increases the efficiency of a predetermined frequency band used by the coil 5. In many cases, the frequency band of the tuning circuit 20 is uniquely set for each manufacturer and model of the vehicle 3.
The receiving circuit 21 detects the synchronization signal received by the coil 5 and outputs it to the vehicle-side charging control device 24.

The transmission circuit 22 is capable of discriminating the charging specification of the vehicle 3 according to the control command of the vehicle-side charging control device 24, more specifically, information capable of discriminating the manufacturer, vehicle type, grade, etc. Then, a response signal (synchronization / activation code) including a charge start request and the like is transmitted to the parking facility side charging device 2 via the coil 5.
The charging circuit 23 rectifies the current induced in the coil 5 and performs charge control such as constant voltage and constant current control while monitoring the terminal voltage and current of the in-vehicle battery 25 that is a secondary battery such as a lithium ion battery. .

  The vehicle-side charging control device 24 performs various control commands in the vehicle-side charging device 4 provided in the vehicle 3, and saves provided in an instrument panel of the vehicle 3 for inputting charging conditions. A charge switch (SW) 27 and an automatic charge permission switch (SW) 28 are connected. When the saving charge switch 27 is held in the ON state, the vehicle-side charge control device 24 performs the charge control in the saving charge mode, and when the automatic charging permission switch 28 is held in the ON state, the vehicle is parked. When the vehicle 3 is parked in the space, charging control is performed so that charging is automatically started. Here, the above-described saving charging mode is a mode in which charging of the in-vehicle battery 25 is stopped with a charging capacity of about 50% to 70% that has a relatively high charging efficiency per unit time and can be quickly charged. Note that, when this saving charging mode is not selected, the in-vehicle battery 25 is continuously charged until it is fully charged.

  When the synchronization signal is input from the receiving circuit 21 and the door lock of the vehicle 3 is locked, the vehicle-side charging control device 24 outputs the above-described response signal from the transmission circuit 22 to the parking facility-side charging device 2. The vehicle-side charging control device 24 is connected to a sensor (not shown) for detecting a terminal voltage, a current integrated value, etc. of the in-vehicle battery 25, and the remaining battery level is determined based on the detection result of the sensor. It is set to be. And the vehicle side charge control apparatus 24 performs transmission control of the charge stop request | requirement signal which stops charge with respect to the parking equipment side charging device 2 according to charge conditions or the determined battery residual amount.

  Further, when the vehicle-side charging control device 24 detects that the door of the vehicle 3 is opened during charging of the vehicle-mounted battery 25 by a door switch (not shown), the vehicle-side charging device 2 via the transmission circuit 22. A charge stop request signal is transmitted.

  Here, FIG. 5 shows a timing chart until the start of charging after entering the vehicle and a voltage waveform between the terminals of the loop coil 6 in the parking facility side charging device 2. A synchronization / activation code is transmitted from the parking facility side charging device 2 to the vehicle 3 from time t1, a response signal including vehicle information is transmitted from the vehicle 3 to the parking facility side charging device 2 at time t2, and transmission ends at time t3. doing. And electric power is transmitted from the parking equipment side charging device 2 at time t4, and charging is started.

  In addition, as shown in FIG. 2, it may replace with the automatic charge permission switch 28, the saving charge switch 27, etc., and you may comprise so that a charging condition can be changed by the customization unit (UNIT) 30. For example, an operation input means (not shown) installed on a steering wheel or the like is connected to the customization unit 30 and an information display (not shown) arranged on a meter panel or the like is connected to the customization unit 30. The user can select and input setting items such as charging capacity and charging time, automatic charging permission items, and the like displayed on the screen via the operation input means, whereby finer charging conditions can be set. Thereby, the stop timing of charge can be set more finely.

The charging system 1 of this embodiment has the above-described configuration. Next, the operation of the charging system 1 will be described with reference to the flowcharts of FIGS.
FIG. 3 is a flowchart of the control process in the vehicle-side charge control device 24. First, in step S100, it is determined whether or not the door is locked. If the determination result in step S100 is “No” (the door is not locked), the process of step S100 is repeated. If the determination result in step S100 is “Yes” (door lock has been performed), the process proceeds to step S101.

In step S <b> 101, it is determined whether or not a charging request code (charging code) is received from the parking facility side charging device 2.
If the determination result in step S101 is “No” (no charging code received), the execution of this routine is temporarily terminated because the parking facility is not rechargeable.
If the determination result in step S101 is “Yes” (with charging code received), the process proceeds to step S102.

In step S102, it is determined whether or not the automatic charging permission switch 28 is ON.
If the determination result in step S102 is “No” (OFF), the user has no intention of automatic charging, so the execution of this routine is temporarily terminated.
When the determination result in step S102 is “Yes” (ON), the process proceeds to step S103, and a charge start request signal is transmitted.

Next, in step S104, it is determined whether door opening (door opening) is detected.
If the determination result in step S104 is “No” (door closed), the process proceeds to step S106.
When the determination result in step S104 is “Yes” (door open), the process proceeds to step S105, and a charge stop request signal is transmitted to the parking facility side charging device 2.

Next, a control process in the facility-side charge control device 11 corresponding to the above-described flowchart of FIG. 3 on the vehicle side will be described with reference to the flowchart of FIG.
First, in step S201, it is determined whether or not the vehicle 3 has been received.
When the determination result in step S201 is “No” (not in stock), the process in step S201 is repeated.
If the determination result in step S201 is “Yes” (warehousing), the process proceeds to step S202, and the lock plate 18 is raised to prohibit the vehicle 3 from leaving.

Next, the charging request code (synchronization / activation code) is transmitted to the vehicle 3 in step S203.
In step S204, it is determined whether a response signal has been received.
If the determination result in step S204 is “No” (no reception), the process proceeds to step S212.
If the determination result in step S204 is “Yes” (received), the process proceeds to step S205 to determine whether there is a charge start request.
If the determination result in step S205 is “No” (no charge start request), the process proceeds to step S209.
If the determination result in step S205 is “Yes” (charging start requested), the process proceeds to step S206, the charging start setting is performed, the charging output is switched to charging, and the process proceeds to step S207.

In step S207, it is determined whether there is a charge stop request.
If the determination result in step S207 is “No” (no charge stop request), the process of step S207 is repeated.
If the determination result in step S207 is "Yes" (charge stop request is present), the process proceeds to step S208, the charge is stopped, the charge amount is calculated, and the process proceeds to step S209.

On the other hand, in step S212, it is determined whether a predetermined time has elapsed.
If the determination result in step S212 is “No” (not elapsed), the process proceeds to step S204 and the above-described processing is repeated.
If the determination result in step S212 is “Yes” (elapsed), the process proceeds to step S209.

In step S209, it is determined whether there is a settlement operation in the settlement apparatus 17.
If the determination result in step S209 is “No”, the process returns to step S203 and the above-described processing is repeated.
If the determination result in step S209 is “Yes”, the process proceeds to step S210 to perform a settlement process, and then the lock plate 18 is lowered (released) in step S211 to end this series of processes.

  In the flowchart of FIG. 4, the case where the charging stop request signal is transmitted from the vehicle side charging device 4 to the parking facility side charging device 2 when the door of the vehicle 3 is opened during charging has been described. For example, when the release of the door lock is detected during charging, or when at least one of the door opening and the door unlocking is detected, the charge stop request signal is sent to the parking facility side charging device 2. You may make it transmit to. When at least one of door opening and door unlocking is detected, a charging stop request signal is transmitted to the parking equipment side charging device 2, and at least one of door opening and door unlocking is If it is detected, charging is stopped. Therefore, when the user gets on the vehicle 3 and starts the engine, the charging can be reliably stopped during communication by a transponder such as an immobilizer.

  Therefore, according to the above-described embodiment, the vehicle 3 is parked in the parking space, the door is opened and closed for the user to get off, and the security code (for example, the carrier wave is used to lock the door). When a locking operation is performed by a keyless entry or a smart key or the like that transmits (about 125 kHz), a charging start request signal is transmitted to the parking facility side charging device 2 by the vehicle side charging control device 24, and the parking facility side charging device 2 Power supply for charging the vehicle-mounted battery 25 to the vehicle 3 is started. As a result, it is possible to prevent a magnetic field from being emitted from the loop coil 6 when a security code such as a keyless entry or a smart key is closed when the door is closed, thereby preventing reception of the security code or the like on the vehicle side. When leaving 3, it is possible to secure the locking and improve the security when parking.

  Further, when the user releases the door lock of the vehicle 3, that is, when the user sends the charge stop request signal to the outside of the vehicle 3 immediately before getting into the vehicle 3, for example, when getting into the vehicle 3 and starting the engine Immobilizer transponder communication, other in-vehicle communication, and the like can be reliably prevented from being disturbed by the electromagnetic field related to charging.

  The present invention is not limited to the above-described embodiment, and the parking facility side charging device 2 may be provided in a parking facility such as a house other than a coin parking that does not include the settlement device 17 or a shared parking lot. good. Then, when charging at a house or a shared parking lot, it is only necessary to charge only a vehicle having an ID or the like registered in advance on the equipment side. What is necessary is just to transmit by communication via the coil 6. FIG. Accordingly, unauthorized charging can be prevented even in a parking facility that does not have a settlement device.

1 is a schematic configuration diagram of a charging system in an embodiment of the present invention. 1 is a block diagram of a charging system in an embodiment of the present invention. It is a flowchart which shows the control process by the side of the vehicle in embodiment of this invention. It is a flowchart which shows the control process by the side of the parking facility in embodiment of this invention. It is a timing chart of the transmission and reception which concerns on the charge start in embodiment of this invention.

Explanation of symbols

1 Charging System 2 Parking Facility Charging Device (Vehicle External Device)
3 Vehicle 5 Coil (Secondary coil)
6 Loop coil (primary coil)
24 Vehicle-side charge control device (control means)
25 On-board battery (secondary battery)

Claims (5)

A secondary coil for performing non-contact charging from a primary coil of a vehicle external device provided outside the vehicle to a secondary battery mounted on the vehicle, and charging starts when a predetermined condition is satisfied A vehicle charging system comprising control means for transmitting a request signal and a charge stop request signal to a vehicle external device,
With a locking device that can be locked from a mobile terminal by wireless communication,
The control means includes
Prohibiting transmission of the charge start request signal to the vehicle external device until the door of the vehicle is locked;
When the door of the vehicle is locked , the charging start request signal is transmitted to the vehicle external device in a non-contact manner through the primary coil and the secondary coil by energizing the primary coil. A charging system for a vehicle. The control means transmits the charge stop request signal to the vehicle external device when at least one of unlocking of the vehicle door or opening of the vehicle door is detected during charging. The vehicle charging system according to claim 1 . 3. The vehicle charging system according to claim 1, wherein the locking device transmits and receives a security code by a locking operation of the mobile terminal, and locks and unlocks the door of the vehicle based on the transmission and reception of the security code. The vehicle charging system according to any one of claims 1 to 3, wherein the vehicle starts an engine based on a communication result by transponder communication of an immobilizer. The control means includes an automatic charge permission switch, and transmits the charge start request signal to the vehicle external device when the door of the vehicle is locked and the automatic charge permission switch is ON. 5. The vehicle charging system according to claim 4.

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