Vehicles and vehicle charging systems

Abstract

To provide a vehicle or the like capable of improving communication quality of an emergency report signal.SOLUTION: According to one embodiment of the disclosure, a vehicle includes a battery for accumulating power supplied from an external charger, a motor as a driving force source, a motor control part for controlling an operation of the motor on the basis of the power accumulated in the battery, a first communication part for performing communication between an emergency switch and an external organization, a notification part for making the first communication part transmit an emergency report signal to the external organization when the emergency switch is pressed down, a second communication part for communicating with the charger, a charging stop control part for making the second communication part transmit a charging stop command to the charger when the emergency switch is pressed down during a charging period, and a frequency control part for previously setting a communication frequency in transmitting the emergency report signal so as not to interfere with a frequency band of a charging noise frequency on the basis of noise frequency transition information showing transition of the charging noise frequency during the charging period, acquired from the charger through the second communication part.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a vehicle having a battery, and a vehicle charging system including such a vehicle and a charging device. [Background technology]

[0002] 2. Description of the Related Art There has been proposed a vehicle charging system in which a battery of an electric vehicle is charged from an external charging device (such as a charging station) (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-26953 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, some of such vehicles are provided with a switch (emergency switch) for issuing an emergency call signal to a predetermined external organization. Since it is important to ensure the communication quality of such an emergency call signal, there is a demand for improving the communication quality. It is desirable to provide a vehicle and a vehicle charging system capable of improving the communication quality of the emergency call signal. [Means for solving the problem]

[0005] A vehicle according to one embodiment of the present disclosure includes a battery that stores power supplied from an external charging device, a motor as a driving force source, a motor control unit that controls the operation of the motor based on the power stored in the battery, an emergency switch, a first communication unit that communicates with an external organization, a notification unit that causes the first communication unit to send an emergency call signal to the external organization when the emergency switch is pressed, a second communication unit that communicates with the charging device, a charging stop control unit that causes the second communication unit to send a charging stop command to the charging device when the emergency switch is pressed during a charging period in which power is supplied from the charging device to the battery, and a frequency control unit that sets in advance the communication frequency for transmitting the emergency call signal so as not to interfere with the frequency band of the charging noise frequency, based on noise frequency transition information indicating the transition of the charging noise frequency during the charging period, obtained from the charging device via the second communication unit. The frequency control unit pre-sets the communication frequency based on noise frequency shift information when the charging voltage control for supplying power in the charging device is PFM control.

[0006] A vehicle charging system according to an embodiment of the present disclosure includes the vehicle according to the embodiment of the present disclosure and the charging device. [Brief description of the drawings]

[0007] [Figure 1] 1 is a block diagram illustrating a schematic configuration example of a vehicle charging system according to an embodiment of the present disclosure. [Diagram 2] 2 is a block diagram illustrating an example of a detailed configuration of the vehicle charging system illustrated in FIG. 1. [Diagram 3] 1 is a flowchart illustrating an example of a communication frequency presetting process according to an embodiment. [Figure 4] 11 is a flowchart illustrating an example of a charging operation stopping process according to the embodiment. [Diagram 5] FIG. 2 is a schematic diagram for explaining PWM control and PFM control. [Figure 6] 10 is a schematic diagram for explaining PFM control when a charging voltage drops when a charging operation is stopped. FIG. [Figure 7] 5 is a schematic diagram illustrating an example of noise frequency transition information according to the embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The description will be made in the following order. 1. Embodiment (Example of a case where a vehicle is charged from a charging device via a charging cable) 2. Variations

[0009] <1. Preferred embodiment> [composition] Fig. 1 is a block diagram showing a schematic configuration example of a vehicle charging system (vehicle charging system 3) according to an embodiment of the present disclosure. Fig. 2 is a block diagram showing a detailed configuration example of the vehicle charging system 3 shown in Fig. 1. Note that Fig. 1 shows only a part of each configuration example shown in Fig. 2.

[0010] 1 and 2, the vehicle charging system 3 includes a vehicle 1, which is an electrically powered vehicle, and a charging device 2 that supplies power P to the vehicle 1. Note that, although details will be described later, in the example shown in Figs. 1 and 2, charging is performed from the charging device 2 to the vehicle 1 in a wired manner using a charging cable 4.

[0011] (A. Vehicle 1) As shown in FIGS. 1 and 2, the vehicle 1 includes a driving force source 10, a battery 11, a position information acquisition unit 12, communication units 131 and 132, an emergency switch 14, and a vehicle control unit 15.

[0012] (A-1. Driving force source 10) 2, the vehicle 1 is provided with an engine 10a (internal combustion engine) and a motor 10b (electric motor) as the driving force source 10. That is, the vehicle 1 is configured as a hybrid vehicle (HEV: Hybrid Electric Vehicle) having the engine 10a and the motor 10b as the driving force source 10. In particular, the vehicle 1 is a PHEV (Plug-in Hybrid Vehicle) that can be charged with electric power P from the charging device 2 as described above.

[0013] Therefore, the vehicle 1 is provided with three types of driving modes: hybrid driving, in which both the engine 10a and the motor 10b are used as driving power sources, engine driving, in which only the engine 10a is used as a driving power source, and motor driving, in which only the motor 10b is used as a driving power source.These three types of driving modes can be switched as needed depending on the driving conditions of the vehicle 1, etc.

[0014] (A-2. Battery 11) The battery 11 stores the electric power used in the vehicle 1, and is configured using various types of secondary batteries such as a lithium ion battery. The battery 11 is configured to store electric power P (charging power) supplied from outside the vehicle 1 (the charging device 2) as well as regenerative power supplied from the motor 10b, for example.

[0015] (A-3. Location information acquisition unit 12) The position information acquisition unit 12 acquires position information Ip of the vehicle 1 at any time, and is configured using, for example, a GNSS (Global Navigation Satellite System) antenna. The position information Ip acquired in this manner is transmitted to a vehicle control unit (described later) as shown in FIG. The system is designed to supply 15.

[0016] (A-4. Communication section 131, 132) The communication unit 131 communicates with the outside (such as a specific external organization 9 described below), and is configured using, for example, a roof antenna. In a specific case (emergency) described below, the communication unit 131 transmits an emergency call signal Se to the specific external organization 9 in response to an instruction from a call unit 152a in the vehicle control unit 15 described below (see Figs. 1 and 2). Examples of such external organizations 9 include organizations called call centers and support centers.

[0017] The communication unit 132 communicates with the charging device 2 (a communication unit 23 described later). Specifically, the communication unit 132 transmits a charging stop command Cs described later to the charging device 2 side, and receives noise frequency shift information Ifn and control method information Ic described later from the charging device 2 side (see FIG. 2). Note that such communication between the communication units 132 and 23 may be either wired communication or wireless communication. In the example shown in FIG. 2, the communication path between the communication units 132 and 23 is shown separately from the charging cable 4 for supplying power P, but is not limited to this example. That is, the communication between the communication units 132 and 23 may be, for example, power line communication (PLC) using the charging cable 4.

[0018] Here, the communication unit 131 corresponds to a specific example of a "first communication unit" in the present disclosure, and the communication unit 132 corresponds to a specific example of a "second communication unit" in the present disclosure.

[0019] (A-5. Emergency Switch 14) The emergency switch 14 is a switch that is pressed by, for example, an occupant (driver or passenger) of the vehicle 1 in an emergency such as when the occupant suddenly becomes unwell. When the emergency switch 14 is pressed by an occupant, an emergency switch-on signal Son is output from the emergency switch 14 to the vehicle control unit 15 (a reporting unit 152a described later) as shown in Figs. 1 and 2.

[0020] (A-6. Vehicle control unit 15) The vehicle control unit 15 is a part that controls various operations in the vehicle 1 and performs various arithmetic processing. Specifically, the vehicle control unit 15 includes, for example, one or more processors (CPU: Central Processing Unit) that execute programs, and one or more memories communicatively connected to these processors. In addition, such memories are, for example, configured with a RAM (Random Access Memory) that temporarily stores processing data, and a ROM (Read Only Memory) that stores programs, etc.

[0021] 1 and 2, the vehicle control unit 15 has a traveling control unit 151 (hybrid control unit) and an emergency operation unit 152. Note that the vehicle control unit 15 operates, for example, based on the power P stored in the battery 11, as shown in FIG.

[0022] (Drive control unit 151) The driving control unit 151 controls the driving operation of the vehicle 1, and performs overall control regarding the driving of the vehicle 1. In the example shown in Fig. 2, the driving control unit 151 has an engine control unit 151a and a motor control unit 151b.

[0023] The engine control unit 151a controls various operations of the engine 10a (see FIG. 2). That is, the engine control unit 151a functions as a so-called "Engine Control Unit (ECU)."

[0024] The motor control unit 151b controls various operations of the motor 10b (see FIG. 2). Specifically, the motor control unit 151b controls, for example, the driving operation of the wheels of the vehicle 1 by the motor 10b, the regenerative operation of the motor 10b, and the like.

[0025] (Emergency Operation Part 152) The emergency operation unit 152 is a part that performs various operations related to an emergency (when the above-mentioned emergency call signal Se is transmitted) in the vehicle 1. In the example shown in Fig. 2, the emergency operation unit 152 has a reporting unit 152a, a frequency control unit 152b, and a charging stop control unit 152c.

[0026] The reporting unit 152a transmits an emergency call signal Se from the communication unit 131 to the external organization 9 when the emergency switch 14 is pressed (when the emergency switch-on signal Son is output). This emergency call signal Se also includes, for example, the position information Ip of the vehicle 1 acquired by the position information acquisition unit 12. When the external organization 9 receives the emergency call signal Se including such position information Ip, an operator or the like requests, for example, the dispatch of an emergency vehicle.

[0027] The frequency control unit 152b controls the communication frequency fse when the emergency call signal Se is transmitted from the notification unit 152a. Specifically, the frequency control unit 152b is configured to set the value of such communication frequency fse in advance (before transmitting the emergency call signal Se) based on noise frequency transition information Ifn acquired from the charging device 2 via the communication unit 132, as will be described later in detail. This noise frequency transition information Ifn is information indicating a transition (change over time) of a charging noise frequency fn, which will be described later, during a period (charging period) during which power P is supplied from the charging device 2 to the battery 11. Note that, for example, the transition of such a charging noise frequency fn may be a transition from the start of the charging period to the stop of the charging period, but may be a transition during a part of the charging period, rather than a transition during the entire period from the start of the charging period to the stop of the charging period.

[0028] The charge stop control unit 152c, which will be described in detail later, transmits a charge stop command Cs from the communication unit 132 to the charging device 2 (communication unit 23, which will be described later) when the emergency switch 14 is pressed during the charging period described above (see FIG. 2). This charge stop command Cs, which will be described in detail later, is a command (command signal) for stopping charging (supply of power P) from the charging device 2 to the battery 11.

[0029] (B. Charging device 2) As described above, the charging device 2 is a device that supplies (charges) electric power P to the battery 11 in the vehicle 1 via the charging cable 4. In the example shown in Fig. 1, the charging device 2 is configured as a charging stand, but may be, for example, a small charger or charging equipment installed on a road or in a parking lot. Such a charging device 2 includes a charging unit 21, a charging control unit 22, and a communication unit 23, as shown in Fig. 2.

[0030] (B-1.Charging part 21) The charging unit 21 is a part that performs a charging operation to supply power P to the battery 11 (see FIG. 2). The charging unit 21 is configured to include, for example, a predetermined switching power supply device (a device that controls and outputs the value of a charging voltage Vp, which will be described later).

[0031] (B-2. Charging control unit 22) The charging control unit 22 controls the charging operation in the charging unit 21. Specifically, the charging control unit 22 controls such a charging operation by, for example, controlling the operation (switching operation) of the switching power supply device described above. In addition, although details will be described later, the charging control unit 22 stops the charging operation in the charging unit 21 when the charging control unit 22 receives the above-mentioned charging stop command Cs from the vehicle 1 (communication unit 132) via the communication unit 23 described later (see FIG. 2). In addition, in the charging control unit 22, the above-mentioned noise frequency shift information Ifn is generated as needed and stored in advance as shown in FIG. 2.

[0032] (B-3. Communications Department 23) The communication unit 23 communicates with the vehicle (the communication unit 132 described above). Specifically, as described above, the communication unit 23 receives a charging stop command Cs from the communication unit 132 and transmits noise frequency shift information Ifn and control method information Ic to the communication unit 132 (see FIG. 2). Note that, although details will be described later, this control method information Ic is information indicating a control method of the charging unit 21 by the charging control unit 22 (for example, the control method of the switching operation described above).

[0033] Here, such a communication unit 23 corresponds to a specific example of a "third communication unit" in the present disclosure.

[0034] [Operation and Effects] Next, the operation, functions, and effects of this embodiment will be described in detail.

[0035] (A. About charging noise) First, the charging noise, which is the premise of the above-mentioned charging noise frequency fn, will be described. This charging noise is electromagnetic noise generated from the charging device 2 side when charging the battery 11 (during the above-mentioned charging period), and is generated along with the switching operation in the charging section 21. Specifically, although details will be described later, the switching frequency fsw during this switching operation and the frequency of this charging noise (charging noise frequency fn) are approximately equal (fn ≈ fsw).

[0036] In this way, since such charging noise occurs during the charging period of the battery 11, there is a risk that when the emergency switch 14 is pressed and the emergency call signal Se is transmitted in the above-mentioned emergency, the following may occur. That is, such charging noise (electromagnetic noise) may interfere with the communication of the emergency call signal Se, and the emergency call signal Se may not be transmitted normally to the external organization 9. In particular, when the charging device 2 is a charging stand, rapid charging is performed at a high voltage (the value of the charging voltage Vp described later is high), and as a result, the charging noise becomes large, which is highly likely to interfere with the emergency call signal Se.

[0037] In addition, as will be described later in detail, when the charging operation of the battery 11 is stopped in response to the charging stop command Cs, for example, if the charging operation is suddenly interrupted, a surge voltage occurs in the charging voltage Vp output from the charging unit 21, and the following occurs. That is, when such a charging operation is stopped, the charging control unit 22 controls the charging of the charging unit 21 so that the charging voltage Vp gradually decreases to 0 [V]. Therefore, even if the charging stop command Cs is issued, charging noise caused by the switching operation in the charging unit 21 still occurs during the period in which the charging voltage Vp gradually decreases, and this may interfere with the emergency call signal Se. In addition, as will be described later in detail, when the charging voltage Vp decreases (changes) in this way, there are cases in which the value of the charging noise frequency fn also changes.

[0038] For these reasons, it is desirable to prevent a deterioration in the communication quality of the emergency call signal Se (such as the communication failure described above) caused by such charging noise (charging noise that occurs during the charging period or charging noise that remains and changes in frequency even when the charging operation is stopped).

[0039] (B. Various Processing in the Present Embodiment) Therefore, in the vehicle charging system 3 of this embodiment, in order to prevent a deterioration in the communication quality of the emergency call signal Se caused by such charging noise, various processes (pre-setting process of the communication frequency fse, charging operation stop process, etc.) are performed as described in detail below.

[0040] Hereinafter, an example of the above-mentioned various processes in this embodiment will be described in detail with reference to FIGS. 3 to 7 in addition to FIGS.

[0041] (B-1. Pre-setting process of communication frequency fse) 3 is a flow chart showing an example of a presetting process of the communication frequency fse in the present embodiment. Note that, as described above, this presetting means setting at a stage before transmitting the emergency call signal Se.

[0042] 3, first, whether or not the charging period described above is in progress (whether or not the charging connector of the charging cable 4 is connected to the vehicle 1 side) is determined by, for example, the emergency operation unit 152 or the charging control unit 22 (step S11). If it is determined that the charging period is not in progress (the charging connector is not connected to the vehicle 1 side) (step S11: N), the process returns to step S11 again.

[0043] On the other hand, when it is determined that the charging period is in progress (the charging connector is connected to the vehicle 1 side) (step S11: Y), the charging control unit 22 then performs the following process, for example, in response to a request via communication from the emergency operation unit 152 or according to its own judgment. That is, in this case, the charging control unit 22 causes the charging device 2 to transmit the above-mentioned noise frequency shift information Ifn to the vehicle 1 (step S12). Specifically, the charging control unit 22 causes the communication unit 23 to transmit the noise frequency shift information Ifn to the communication unit 132 (see FIG. 2). As a result, the transmitted noise frequency shift information Ifn is supplied to the frequency control unit 152b in the vehicle 1 via the communication unit 132.

[0044] Next, the frequency control unit 152b judges whether the communication frequency fse of the emergency call signal Se interferes with the frequency band Δfn of the charging noise frequency fn based on the noise frequency shift information Ifn acquired in this way (step S13). Note that this frequency band Δfn is a frequency band having a predetermined bandwidth including the charging noise frequency fn. Here, if it is judged that such a communication frequency fse does not interfere with the frequency band Δfn of the charging noise frequency fn (step S13:N), the following occurs. That is, in this case, since there is no risk of the communication quality of the emergency call signal Se being degraded due to the charging noise as described above, the series of processes shown in FIG. 3 is terminated.

[0045] On the other hand, if it is determined that the communication frequency fse interferes with the frequency band Δfn of the charging noise frequency fn (step S13: Y), the following occurs: In this case, the frequency control unit 152b next sets the communication frequency fse in advance based on the acquired noise frequency shift information Ifn so that the communication frequency fse does not interfere with the frequency band Δfn of the charging noise frequency fn (step S14).

[0046] Here, as a method for presetting the communication frequency fse so as not to interfere with the frequency band Δfn of the charging noise frequency fn, for example, the following method can be mentioned, as shown in Fig. 3. Note that the frequency different from the frequency band Δfn may be either a frequency on the higher frequency side than this frequency band Δfn, or a frequency on the lower frequency side than the frequency band Δfn. Set the communication frequency fse to a frequency different from the frequency band Δfn of the charging noise frequency fn (fse ≠ Δfn). Set the communication frequency fse to a frequency different from the frequency band Δfn of each frequency that is an integer multiple (N times) of the charging noise frequency fn (fse ≠ (N × fn) frequency band Δfn)

[0047] Incidentally, an example of a method in the case of PFM control shown in FIG. 3, which will be described later, will be described later.

[0048] This completes the series of processes shown in FIG.

[0049] (B-2. Charging operation stop processing) FIG. 4 is a flowchart showing an example of the charging operation stopping process according to the present embodiment.

[0050] In the processing example shown in Fig. 4, first, when the notification unit 152a receives the above-mentioned emergency switch-on signal Son from the emergency switch 14 (step S21), the following occurs. That is, whether or not the above-mentioned charging period is in progress (whether or not the charging connector of the charging cable 4 is connected to the vehicle 1 side) is determined by, for example, the emergency operation unit 152 or the charging control unit 22 (step S22). Here, if it is determined that the charging period is not in progress (the charging connector is not connected to the vehicle 1 side) (step S22: N), the following occurs. That is, in this case, since there is no risk of a decrease in the communication quality of the emergency notification signal Se due to charging noise as described above, the series of processing shown in Fig. 4 ends.

[0051] On the other hand, when it is determined that the charging period is in progress (the charging connector is connected to the vehicle 1 side) (step S22: Y), the following occurs. That is, in this case, the charging stop control unit 152c then causes the vehicle 1 to transmit the above-mentioned charging stop command Cs toward the charging device 2 (step S23). Specifically, the charging stop control unit 152c causes the communication unit 132 to transmit the charging stop command Cs toward the communication unit 23 (see FIG. 2). As a result, the transmitted charging stop command Cs is supplied to the charging control unit 22 in the charging device 2 via the communication unit 23.

[0052] Next, the charge control unit 22 stops the charging operation of the charging unit 21 on the battery 11 in accordance with the charge stop command Cs thus acquired (received) (step S24).

[0053] This completes the series of processes shown in FIG.

[0054] (B-3. Processing example for PFM control) Next, with reference to Figs. 5 to 7, a detailed description will be given of an example of processing in the case of PFM control described above with reference to Fig. 3. Fig. 5 is a schematic diagram for explaining the following PWM control and PFM control. Fig. 6 is a schematic diagram for explaining PFM control when the charging voltage Vp drops when the charging operation is stopped as described in Fig. 4. Fig. 7 is a schematic diagram showing an example of the noise frequency shift information Ifn described above. Note that in Figs. 5 to 7, the horizontal axis mainly indicates time t.

[0055] First, as shown in Figures 5 and 6, the relationship between the voltage (charging voltage Vp: effective voltage) output from the switching power supply device described above and the duty ratio during switching control is as follows: This duty ratio is defined as (pulse width Δp / switching period Tsw)=(pulse width Δp × switching frequency fsw), and as described above, the switching frequency fsw ≈ charging noise frequency fn.

[0056] That is, in order to lower the voltage (charging voltage Vp) as described above, it is necessary to reduce the duty ratio. As shown in FIG. 5, the following two control methods are generally used to reduce the duty ratio. · Control method for changing (reducing) the pulse width →PWM (Pulse Width Modulation) control A control method for changing (reducing) the frequency (switching frequency) →PFM (Pulse Frequency Modulation) control

[0057] Here, for example, as shown by the dashed arrow in Fig. 6, when the charging operation is stopped as described in Fig. 4, the charging voltage Vp gradually decreases. In this case, when the charging voltage Vp is decreased using the above-mentioned PFM control as shown in Fig. 6, the charging noise frequency fn also changes (becomes smaller) with the decrease in the charging voltage Vp as shown in Fig. 6.

[0058] In this way, in the case of the above-mentioned PWM control, even if the charging voltage Vp changes, the switching frequency fsw remains constant, and therefore the frequency of the charging noise (charging noise frequency fn) generated accordingly also remains constant. In contrast, as described above, in the case of PFM control, when the charging voltage Vp changes, the switching frequency fsw changes, and therefore the frequency of the charging noise (charging noise frequency fn) generated accordingly also changes. Therefore, when the charging device 2 (charging unit 21) uses PFM control to control the charging voltage Vp, it is desirable to pre-set the communication frequency fse as described above while also dealing with the charging noise frequency fn that changes due to PFM control.

[0059] Therefore, in this embodiment, when the control of the charging voltage Vp when the charging device 2 supplies the power P is the above-mentioned PFM control, for example, the frequency control unit 152b pre-sets the communication frequency fse based on the noise frequency transition information Ifn as described above. Specifically, when the charging voltage Vp drops based on the charging stop command Cs, the frequency control unit 152b pre-sets the communication frequency fse so as not to interfere with the frequency band Δfn of each frequency in the charging noise frequency fn that changes due to the PFM control, for example. Note that the control method (for example, the PWM control or PFM control as described above) used to control the charging voltage Vp in the charging device 2 (charging unit 21) can be grasped by using, for example, the control method information Ic described above. This is because the control method information Ic is information indicating which of such control methods is being used. Therefore, the frequency control unit 152b may, for example, use the control method information Ic acquired from the charging control unit 22 via the communication units 23, 132 to pre-set the communication frequency fse based on the noise frequency shift information Ifn as described above.

[0060] In addition, at this time, the frequency control unit 152b pre-sets the communication frequency fse using noise frequency transition information Ifn indicating the transition of the charging noise frequency fn until the charging period is stopped, for example, as shown in FIG. 7. In the example of the noise frequency transition information Ifn shown in FIG. 7, as described above, when the charging voltage Vp is gradually lowered by gradually decreasing the switching frequency fsw, the charging noise frequency fn also gradually decreases. In the example of the noise frequency transition information Ifn shown on the left in FIG. 7, the charging noise frequency fn decreases in a staircase (step-like) manner, and in the example of the noise frequency transition information Ifn shown on the right in FIG. 7, the charging noise frequency fn decreases linearly. However, the noise frequency transition information Ifn is not limited to these examples, and the charging noise frequency fn may change in other manners (for example, in a curved shape).

[0061] In detail, the example shown in Fig. 6 is explained as follows. That is, in this example, during PFM control, the value of the switching frequency fsw is changed from 8 kHz to 5 kHz to 2 kHz (duty ratio: 80% to 50% to 20%) to gradually reduce the charging voltage Vp (effective voltage). In this case, the frequency control unit 152b pre-sets the communication frequency fse as follows so as not to interfere with the frequency band Δfn of each frequency in the charging noise frequency fn (≈fsw) that changes due to such PFM control. That is, in this example, the frequency control unit 152b sets the communication frequency fse to a frequency that is not a common multiple of the above-mentioned frequencies of 2 kHz, 5 kHz, and 8 kHz (for example, fse = 17 kHz) so as not to interfere with the frequency band Δfn of each of these frequencies.

[0062] (C. Actions and Effects) In this manner, in the present embodiment, when the emergency switch 14 is pressed during a charging period in which the charging device 2 is supplying power P to the battery 11, the charging stop control unit 152c causes the communication unit 132 to transmit a charging stop command Cs to the charging device 2. As a result, in the present embodiment, during such a charging period, the influence of charging noise emitted from the charging device 2 (charging unit 21) (the deterioration in communication quality of the emergency call signal Se caused by the charging noise as described above) is suppressed.

[0063] In addition, in this embodiment, based on the noise frequency transition information Ifn acquired from the charging device 2 via the communication unit 132, the frequency control unit 152b sets in advance the communication frequency fse when transmitting the emergency call signal Se so as not to interfere with the frequency band Δfn of the charging noise frequency fn. As a result, in this embodiment, the communication frequency fse can be set in advance while also dealing with the transition (change over time) of the charging noise frequency fn during the charging period. Specifically, for example, as described above, even if the charging noise frequency fn changes when the charging voltage Vp drops when the charging operation is stopped, the communication frequency fse can be set in advance so as not to interfere with the frequency band Δfn of the changing charging noise frequency fn. Therefore, in this embodiment, the influence of the fluctuation of the charging noise frequency fn during such a charging period (decrease in the communication quality of the emergency call signal Se due to the charging noise whose frequency fluctuates) can also be suppressed.

[0064] For these reasons, in this embodiment, various influences due to the above-mentioned charging noise (such as charging noise during the charging period and charging noise whose frequency fluctuates when the charging voltage Vp drops) can be suppressed, and degradation of the communication quality of the emergency call signal Se can be suppressed. As a result, in this embodiment, it is possible to improve the communication quality of the emergency call signal Se. Furthermore, since the communication quality of the emergency call signal Se is improved, it is also possible to easily avoid the above-mentioned risk of the emergency call signal Se not being normally transmitted to the external organization 9.

[0065] In addition, in this embodiment, when a charging stop command Cs is received from the vehicle 1 via the communication unit 23, the charging control unit 22 stops the charging operation at the charging unit 21, as described below. That is, the charging operation of the battery 11 by the charging device 2 is actually stopped in accordance with such a charging stop command Cs, so that it is possible to more reliably suppress the deterioration of the communication quality of the emergency call signal Se caused by the charging noise as described above.

[0066] Furthermore, in this embodiment, when the control of the charging voltage Vp when the charging device 2 supplies the power P is the above-mentioned PFM control, if the communication frequency fse is preset based on the noise frequency shift information Ifn, the following occurs. That is, as described above, the communication frequency fse can be preset in response to the charging noise frequency fn that changes due to the PFM control. As a result, it is possible to more reliably suppress the deterioration of the communication quality of the emergency call signal Se caused by the charging noise.

[0067] In addition, in this embodiment, when the charging voltage Vp drops based on the charging stop command Cs, if the communication frequency fse is preset based on the noise frequency transition information Ifn indicating the transition of the charging noise frequency fn until the charging period is stopped so as not to interfere with the frequency band Δfn of each frequency in the charging noise frequency fn that changes due to PFM control, the following occurs. That is, by presetting the communication frequency fse so as not to interfere with the frequency band Δfn of each frequency in the charging noise frequency fn that changes in this manner, it is possible to more reliably suppress the deterioration of the communication quality of the emergency call signal Se caused by the charging noise.

[0068] In addition, in this embodiment, when the communication frequency fse is set to a frequency different from the frequency band Δfn of the charging noise frequency fn based on the noise frequency shift information Ifn, the following occurs: That is, the communication frequency fse can be reliably set so as not to interfere with the frequency band Δfn of the charging noise frequency fn, and it is possible to more reliably suppress the deterioration of the communication quality of the emergency call signal Se caused by the charging noise.

[0069] Furthermore, in this embodiment, when the communication frequency fse is set to a frequency different from the frequency band Δfn of each frequency that is an integer multiple of the charging noise frequency fn based on the noise frequency shift information Ifn, the following occurs. That is, it becomes possible to suppress not only the influence of such a charging noise frequency fn itself, but also the influence of each harmonic component of the charging noise frequency fn. As a result, it becomes possible to more reliably suppress the deterioration of the communication quality of the emergency call signal Se caused by the charging noise.

[0070] <2. Modifications> Although the present disclosure has been described above by way of the embodiment, the present disclosure is not limited to this embodiment and various modifications are possible.

[0071] For example, the configuration (type, shape, arrangement, number, etc.) of each member in vehicle 1 and charging device 2 is not limited to that described in the above embodiment. That is, the configuration of each of these members may be of other types, shapes, arrangements, numbers, etc. Furthermore, the values, ranges, magnitude relationships, etc. of the various parameters described in the above embodiment are not limited to those described in the above embodiment, and may be other values, ranges, magnitude relationships, etc.

[0072] Specifically, for example, the above embodiment has been described with reference to an example in which one motor (motor 10b) is provided in vehicle 1, but the present disclosure is not limited to this example. That is, for example, multiple (two or more) motors may be provided in vehicle 1. Also, the above embodiment has been described with reference to an example in which an electric vehicle (vehicle 1) configured as a hybrid electric vehicle (HEV) is provided, but the present disclosure is not limited to this example, and the present disclosure can also be applied to an electric vehicle configured as an electric vehicle (EV).

[0073] Also, for example, in the above embodiment, an example has been described in which charging is performed from the charging device 2 to the vehicle 1 in a wired manner using the charging cable 4, but this is not limiting. That is, in the vehicle charging system of the present disclosure, for example, charging may be performed wirelessly (contactless power supply) from the charging device to the vehicle.

[0074] Furthermore, in the above embodiment, the various processes performed in the vehicle 1 and the charging device 2 are described using specific examples, but are not limited to these specific examples. That is, these various processes may be performed using other methods. Specifically, for example, the above-mentioned communication frequency presetting process and charging operation stop process are not limited to the methods described in the above embodiment. Furthermore, the content of the noise frequency shift information Ifn described in the above embodiment is not limited to that described in the above embodiment, and may be other content.

[0075] In addition, the series of processes described in the above embodiments may be performed by hardware (circuits) or software (programs). When performed by software, the software is composed of a group of programs for causing a computer to execute each function. Each program may be, for example, pre-installed in the computer and used, or may be installed in the computer from a network or a recording medium and used.

[0076] Moreover, the various examples described above may be applied in any combination.

[0077] It should be noted that the effects described in this specification are merely examples and are not limiting, and other effects may also be obtained.

[0078] The present disclosure can also be configured as follows. (1) a battery that stores power supplied from an external charging device; A motor as a driving force source; a motor control unit that controls an operation of the motor based on the power stored in the battery; An emergency switch, A first communication unit that communicates with an external institution; a notification unit that transmits an emergency notification signal from the first communication unit to the external organization when the emergency switch is pressed; A second communication unit that communicates with the charging device; a charging stop control unit that transmits a charging stop command from the second communication unit to the charging device when the emergency switch is pressed during a charging period in which the power is being supplied from the charging device to the battery; a frequency control unit that sets in advance a communication frequency for transmitting the emergency call signal so as not to interfere with a frequency band of the charging noise frequency, based on noise frequency transition information indicating a transition of a charging noise frequency during the charging period, the communication frequency being acquired from the charging device via the second communication unit; A vehicle equipped with. (2) The frequency control unit is When the charging voltage control when supplying the power in the charging device is PFM control, The communication frequency is preset based on the noise frequency transition information. The vehicle described in (1) above. (3) The frequency control unit is When the charging voltage is decreased based on the charging stop command, the charging noise frequency changes due to the PFM control so as not to interfere with the frequency band of each frequency. The communication frequency is preset based on the noise frequency transition information indicating the transition of the charging noise frequency until the charging period is stopped. The vehicle described in (2) above. (4) The frequency control unit is Based on the noise frequency transition information, The communication frequency is set to a frequency different from the frequency band of the charging noise frequency. A vehicle as described in any one of (1) to (3) above. (5) The frequency control unit is Based on the noise frequency transition information, The communication frequency is set to a frequency different from a frequency band of each frequency that is an integer multiple of the charging noise frequency. A vehicle as described in any one of (1) to (3) above. (6) A vehicle according to any one of (1) to (5) above; The charging device; A vehicle charging system comprising: (7) The charging device is a charging unit that performs a charging operation to supply the power to the battery; A charge control unit that controls the charging operation in the charging unit; a third communication unit that communicates with the vehicle; It has When the charging control unit receives the charging stop command from the vehicle via the third communication unit, the charging control unit stops the charging operation of the charging unit. The vehicle charging system according to (6) above. (8) a battery that stores power supplied from an external charging device; A motor as a driving force source; An emergency switch, A first communication unit that communicates with an external institution; A second communication unit that communicates with the charging device; One or more processors one or more memories communicatively coupled to the one or more processors; Equipped with The one or more processors: Controlling an operation of the motor based on the power stored in the battery; When the emergency switch is pressed, an emergency call signal is transmitted from the first communication unit to the external organization; When the emergency switch is pressed during a charging period in which the power is being supplied from the charging device to the battery, transmitting a charging stop command from the second communication unit to the charging device. based on noise frequency transition information indicating a transition of a charging noise frequency during the charging period, acquired from the charging device via the second communication unit, a communication frequency for transmitting the emergency call signal is set in advance so as not to interfere with a frequency band of the charging noise frequency; Do vehicle. [Explanation of symbols]

[0079] 1...vehicle, 10...driving force source, 10a...engine, 10b...motor, 11...battery, 12...position information acquisition unit, 131, 132...communication unit, 14...emergency switch, 15...vehicle control unit, 151...travel control unit, 151a...engine control unit, 151b...motor control unit, 152...emergency operation unit, 152a...reporting unit, 152b...frequency control unit, 152c...charging stop control unit, 2...charging device, 21...charging unit, 22...charging control unit, 23... Communication unit, 3...vehicle charging system, 4...charging cable, 9...external agency, P...power, Son...emergency switch-on signal, Se...emergency call signal, Ip...location information, Ifn...noise frequency transition information, Ic...control method information, Cs...charging stop command, fn...charging noise frequency, Δfn...frequency band, fse...communication frequency, Δp...pulse width, Tsw...switching period, fsw...switching frequency, t...time, Vp...charging voltage.

Claims

1. a battery that stores power supplied from an external charging device; A motor as a driving force source; a motor control unit that controls an operation of the motor based on the power stored in the battery; An emergency switch, A first communication unit that communicates with an external institution; a notification unit that transmits an emergency notification signal from the first communication unit to the external organization when the emergency switch is pressed; A second communication unit that communicates with the charging device; a charging stop control unit that transmits a charging stop command from the second communication unit to the charging device when the emergency switch is pressed during a charging period in which the power is being supplied from the charging device to the battery; a frequency control unit that sets in advance a communication frequency for transmitting the emergency call signal so as not to interfere with a frequency band of the charging noise frequency, based on noise frequency transition information indicating a transition of a charging noise frequency during the charging period, the communication frequency being acquired from the charging device via the second communication unit; Equipped with The frequency control unit is When the charging voltage control when supplying the power in the charging device is PFM control, The communication frequency is preset based on the noise frequency transition information. vehicle.

2. The frequency control unit is When the charging voltage is decreased based on the charging stop command, the charging noise frequency changes due to the PFM control so as not to interfere with the frequency band of each frequency. The communication frequency is preset based on the noise frequency transition information indicating the transition of the charging noise frequency until the charging period is stopped.

2. The vehicle of claim 1.

3. The frequency control unit is Based on the noise frequency transition information, The communication frequency is set to a frequency different from the frequency band of the charging noise frequency. A vehicle according to claim 1 or 2.

4. The frequency control unit is Based on the noise frequency transition information, The communication frequency is set to a frequency different from a frequency band of each frequency that is an integer multiple of the charging noise frequency. A vehicle according to claim 1 or 2.

5. A vehicle according to any one of claims 1 to 4; The charging device; A vehicle charging system comprising:

6. The charging device is a charging unit that performs a charging operation to supply the power to the battery; A charge control unit that controls the charging operation in the charging unit; a third communication unit that communicates with the vehicle; It has When the charging control unit receives the charging stop command from the vehicle via the third communication unit, the charging control unit stops the charging operation of the charging unit. The vehicle charging system according to claim 5 .

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