JP7040400B2 - vehicle - Google Patents

Description

The present disclosure relates to charge control of a power storage device in a vehicle capable of contact charging and non-contact charging with respect to the mounted power storage device.

Conventionally, vehicles capable of contact charge control and non-contact charge control are known. Contact charge control is, for example, a power storage device mounted on a vehicle using electric power supplied from the power source via the inlet with a connector provided on a cable connected to a power source outside the vehicle connected to the inlet of the vehicle. Includes charge control to charge. Further, the non-contact charge control includes, for example, a charge control for charging the power storage device using the electric power received by the power receiving device in a non-contact manner without using a contact from the power transmission device connected to the power source outside the vehicle.

In such a vehicle, for example, reserved charging may be performed so that charging is completed at a preset time (scheduled departure time). When such reserved charging is performed, it is required to estimate the time required for charging to complete charging immediately before the set time (hereinafter referred to as charging time) with high accuracy so as not to cause a deviation. Be done. For example, Japanese Patent No. 6183411 (Patent Document 1) discloses a technique for estimating the charging time with high accuracy by calculating the charging power in consideration of the operation schedule of the auxiliary load operating during charging.

Japanese Patent No. 6183411

However, for example, when the contact charge control is executed and the non-contact charge control is executed, the power transmission path from the power source to the power storage device mounted on the vehicle is different, so that the same degree of deviation occurs between the two. Even if the charging time is estimated, it may not be possible to estimate the charging time with high accuracy. Further, even when the same non-contact charging control is executed, the relative positions of the power transmitting device and the power receiving device change depending on the parking position of the vehicle. However, it may not be possible to estimate the charging time with high accuracy.

The present disclosure has been made to solve the above-mentioned problems, and an object of the present disclosure is to provide a vehicle that estimates the charging time with high accuracy according to the state of external charging.

The vehicle according to a certain aspect of the present disclosure includes a power storage device, an inlet that can be connected to a charging connector connected to a power source outside the vehicle, a power receiving device that can receive power in a non-contact manner from a power transmission device outside the vehicle, and a power source. Contact charge control that charges the power storage device using the power supplied from the inlet via the inlet, and non-contact charge control that charges the power storage device using the power received from the power transmission device via the power receiving device. It is equipped with a control device that can be selectively executed. When the reserved charge by the contact charge control is set, the control device calculates the charge time required to complete the charge of the power storage device when the contact charge control is executed by using the first correction value. When the reserved charge by the contactless charge control is set, the control device calculates the charge time at the time of executing the contactless charge control using the second correction value corresponding to the relative position between the power transmission device and the power receiving device. do. When the reserved charge by the contact charge control is completed, the control device calculates the first correction value by using the difference between the calculated charge time and the actual charge time. When the reserved charging by the non-contact charging control is completed, the control device is associated with the relative position between the power transmitting device and the power receiving device by using the difference between the calculated charging time and the actual charging time. 2 Calculate the correction value.

In this way, when the reserved charge by the contact charge control is set, the charging time is calculated using the first correction value, and when the reserved charge by the non-contact charge control is set, the second correction value is set. Since the charging time is calculated using this, the charging time can be estimated with high accuracy in any case. Further, since the second correction value is calculated in association with the relative position between the power transmission device and the power receiving device when the reserved charging is completed, the relative position between the power transmission device and the power receiving device changes depending on the parking position of the vehicle. Even in this case, the charging time can be estimated with high accuracy.

According to the present disclosure, it is possible to provide a vehicle that estimates the charging time with high accuracy according to the state of external charging.

It is a block diagram of the vehicle charging system including the vehicle which concerns on this embodiment. It is a circuit diagram which shows typically the power receiving system of non-contact charge. It is a figure for demonstrating the difference between the estimated charge time and the actual charge time. It is a figure which shows an example of the change of the charge power when the contact charge control is repeatedly executed. It is a figure which shows an example of the change of the charge power when contact charge control and non-contact charge control are executed alternately. It is a flowchart which shows an example of the control process executed by the ECU in this embodiment. It is a figure which shows the relationship between the relative position of a power transmission device and a power receiving device, and a second correction value. It is a figure which shows an example of the change of the charge power of a contact charge control and the charge power of a non-contact charge control. It is a figure which shows an example of the change of the charge power of the non-contact charge control when the relative position of a power transmission device and a power receiving device is different.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In principle, the same or corresponding parts in the following figures are designated by the same reference numerals and the description thereof will not be repeated.

<About the configuration of the vehicle charging system>
FIG. 1 is a configuration diagram of a vehicle charging system 1 including a vehicle 100 according to the present embodiment. With reference to FIG. 1, the vehicle charging system 1 includes a vehicle 100, a charging stand 200, a charging cable 300, a charging connector 310, a power transmission device 400, and a grid power supply 500.

The vehicle 100 is, for example, an electric vehicle driven by a motor generator (not shown).

The vehicle 100 includes an inlet 110, a power storage device 120, a charger 130, a PCU (Power Control Unit) 140, a power receiving device 150, a touch panel display 170, a communication device 180, and an ECU (Electronic Control Unit) 190. To prepare for.

The inlet 110 has a shape to which the charging connector 310 can be connected. The inlet 110 has a built-in terminal that is electrically connected to the charger 130. When the charging connector 310 is connected to the inlet 110, the terminal inside the inlet 110 and the terminal built in the charging connector 310 come into contact with each other. As a result, the inlet 110 can receive power from the system power supply 500 via the charging stand 200, the charging cable 300, and the charging connector 310. The electric power received at the inlet 110 is output to the charger 130.

The power storage device 120 is a power storage element configured to be chargeable and dischargeable. The power storage device 120 includes, for example, a secondary battery such as a lithium ion battery, a nickel hydrogen battery or a lead storage battery, and a power storage element such as an electric double layer capacitor.

The charger 130 converts AC power supplied from the charging stand 200 via the inlet 110 into DC power in response to a control signal from the ECU 190. The charger 130 boosts or lowers the output voltage to a desired voltage and supplies it to the power storage device 120. The charger 130 includes, for example, a rectifier circuit that converts AC power into DC power, and a converter that boosts or steps down the voltage.

The PCU 140 includes an inverter, a converter, and the like, and converts the DC power supplied from the power storage device 120 into AC power according to the control signal from the ECU 190 and supplies the DC power to the motor generator. As a result, the traveling driving force of the vehicle 100 is generated in the motor generator. Alternatively, the PCU 140 converts the AC power generated by the regenerative operation of the motor generator into DC power and supplies it to the power storage device 120. As a result, the power storage device 120 can be charged.

The power receiving device 150 converts the AC power received from the power transmitting device 400 via the power receiving coil in a non-contact manner (that is, without a contact between the power receiving device 150 and the power transmitting device 400) into DC power, and converts the voltage into DC power. Is converted into a desired voltage and then supplied to the power storage device 120. As a result, the power storage device 120 can be charged. The detailed configuration of the power receiving device 150 will be described later.

The touch panel display 170 is provided, for example, at a position that can be visually recognized when the user is seated in the driver's seat. The touch panel display 170 displays various information and accepts predetermined operations by the user.

The communication device 180 is configured to be capable of wireless communication with the communication unit 402 of the power transmission device 400 existing within the communicable range. The communication device 180 receives information on the WPT (Wireless Power Transfer) class corresponding to the power transmission device 400, information on the magnitude of the transmission power of the power transmission device 400, and the like from the communication unit 402 of the power transmission device 400. Communication between the communication unit 402 of the power transmission device 400 and the communication device 180 is automatically performed, for example, by performing authentication registration in advance, when the vehicle 100 enters the communication range of the communication unit 402 of the power transmission device 400. Established. Both the communication device 180 and the communication unit 402 are composed of, for example, a wireless LAN (Local Area Network) module compliant with IEEE (Institute of Electrical and Electronic Engineers) 802.11. In this case, the communication unit 402 of the power transmission device 400 functions as a master unit in the wireless LAN. Communication between the communication device 180 and the communication unit 402 is established, for example, to initiate contactless power transfer. In the communication between the communication device 180 and the communication unit 402, for example, information on the start / stop of power transmission, information on the power receiving status of the power receiving device 150 (received voltage, received current, received power, etc.), and the power transmission device. Information about the relative position between the 400 and the power receiving device 150 is exchanged.

The ECU 190 has a built-in CPU (Central Processing Unit) and a memory 192 (not shown), and each device (charger 130, charger 130,) of the vehicle 100 is based on the information stored in the memory 192 and the information from each sensor (not shown). PCU 140, power receiving device 150, touch panel display 170 and communication device 180) are controlled. The control executed by the ECU 190 is not limited to processing by software, but can also be processed by dedicated hardware (electronic circuit). Further, the ECU 190 has a clock function (for example, a radio clock or the like), and has a time acquisition unit (not shown) for acquiring the current time.

The charging stand 200 is installed outside the vehicle 100 and is a device for supplying electric power from the system power supply 500 to the vehicle 100. A charging cable 300 is connected to the charging stand 200. A charging connector 310 is provided at the tip of the charging cable 300.

The power transmission device 400 is installed outside the vehicle 100 and is a device for transmitting the electric power from the system power source 500 to the vehicle 100 in a non-contact manner. The power transmission device 400 includes a communication unit 402 for communicating with the vehicle 100, a power transmission unit 404, a camera 406, and a control unit 408.

As described above, the communication unit 402 exchanges various information with the communication device 180 after the communication with the communication device 180 is established. The communication unit 402 operates in response to a control signal from the control unit 408.

The camera 406 is an image pickup device for capturing an image for determining whether or not the positional relationship between the vehicle 100 and the power transmission device 400 is a positional relationship capable of non-contact charging. The camera 406 is equipped with, for example, a fisheye lens and is provided so as to face above the power transmission device 400. The camera 406 is configured to be able to capture a wide space including the power receiving device 150 when the vehicle 100 moves toward the power transmission device 400 by using a fisheye lens. The camera 406 images the space above the power transmission device 400 in response to the control signal from the control unit 408.

The power transmission unit 404 is composed of a power transmission coil or the like. Hereinafter, a detailed configuration of the non-contact charging power receiving system including the power receiving device 150 and the power transmitting unit 404 described above will be described. FIG. 2 is a circuit diagram schematically showing a power receiving system for non-contact charging. As shown in FIG. 2, the power receiving device 150 includes a resonator 5A and a rectifier 5R. The resonator 5A is an LC resonator and includes a power receiving coil 5L and a capacitor 5T connected to the rectifier 5R. The Q value of the resonator 5A is 100 or more. The rectifier 5R converts the AC power received by the resonator 5A into DC power and supplies it to the power storage device 120.

The power transmission unit 404 includes a resonator 8A and a converter 8R. The resonator 8A is an LC resonator and includes a power transmission coil 8L and a capacitor 8T connected to the resonator 8A. The Q value of the resonator 8A is also 100 or more. The resonance frequency of the resonator 8A and the resonance frequency of the resonator 5A are substantially the same. The converter 8R is connected to the system power supply 500. The converter 8R adjusts the frequency and voltage of the AC power supplied from the system power supply 500 and supplies the AC power to the resonator 8A.

In the above configuration, in the vehicle 100, the contact charge control for charging the power storage device 120 mounted on the vehicle 100 by using the electric power charged from the charging stand 200 via the charging cable 300 and the charging connector 310. A non-contact charge control that charges the power storage device 120 using the power received from the power transmission device 400 can be selectively executed.

In the present embodiment, the ECU 190 executes the charge control that can be executed, for example, when the state of the vehicle 100 becomes a state in which either the contact charge control or the non-contact charge control can be executed. .. Hereinafter, each charge control will be described.

<About contact charge control>
The ECU 190 executes contact charge control, for example, when the charging connector 310 is connected to the inlet 110.

The ECU 190 detects whether or not the charging connector 310 is connected to the inlet 110 by using, for example, a connection detection circuit (not shown). Specifically, the connection detection circuit outputs an on signal to the ECU 190 when the charging connector 310 is connected to the inlet 110. The connection detection circuit stops the output of the on signal when the charging connector 310 is removed from the inlet 110 (that is, when the connection between the charging connector 310 and the inlet 110 is disconnected). The connection detection circuit may be configured by, for example, a switch, or may be configured by an electric circuit whose circuit resistance changes when the charging connector 310 is connected to the inlet 110. Upon receiving the ON signal from the connection detection circuit, the ECU 190 determines that the charging connector 310 is connected to the inlet 110 (that is, the contact charging control is feasible), and executes the contact charging control.

When the ECU 190 starts the contact charging control, the contact charging control such as the magnitude of the power (charging power) supplied by the charging stand 200 by the pilot signal (CPLT) received from the charging stand 200 via the charging cable 300. The charger 130 is controlled based on the acquired information. The ECU 190 stops the contact charge control when the charging connector 310 is removed from the inlet 110 or when the SOC (State Of Charge) of the power storage device 120 reaches the threshold value (SOC corresponding to the fully charged state). ..

<About non-contact charge control>
The ECU 190 executes the non-contact charging control when the positional relationship between the vehicle 100 and the power transmission device 400 is such that the non-contact charging control can be executed.

The ECU 190 determines whether or not the positional relationship between the vehicle 100 and the power transmission device 400 is such that contactless charging control can be executed, based on the image pickup data of the camera 406 transmitted from the power transmission device 400.

The control unit 408 of the power transmission device 400 activates the camera 406 when communication between the communication unit 402 and the communication device 180 is established. When the camera 406 is activated, it captures an image of the space above the power transmission device 400 and transmits the captured image data to the control unit 408. The control unit 408 acquires image data from the camera 406, and transmits the acquired image data to the ECU 190 via the communication unit 402. A mark for specifying the position of the power receiving device 150 from the captured image data is provided at a predetermined position on the lower surface of the power receiving device 150 (the surface facing the power transmitting device 400).

The ECU 190 identifies the mark from the image data received from the power transmission device 400, and the relative position between the vehicle 100 (power receiving device 150) and the power transmission device 400 based on the position and size of the specified mark in the image data. Relationships (horizontal (X-direction (eg, vehicle front-rear) and Y-direction (eg, vehicle left-right)) and vertical (Z-direction (eg, vehicle up-down)) distances are calculated. To. The ECU 190 states that the positional relationship between the vehicle 100 and the power transmission device 400 is a positional relationship in which non-contact charging control can be executed (for example, a positional relationship in which the horizontal distance and the vertical distance are within a predetermined range). When it is determined (that is, when it is determined that the non-contact charge control is feasible), the non-contact charge control is executed in cooperation with the power transmission device 400.

The ECU 190 performs non-contact charge control when the positional relationship between the vehicle 100 and the power transmission device 400 is no longer capable of executing non-contact charge control, or when the SOC of the power storage device 120 reaches a threshold value. Stop. In FIG. 1, for convenience of explanation, a configuration in which both contact charge control and non-contact charge control can be executed has been described as an example, but the vehicle 100 is located in a place where only contact charge control can be executed. It may be parked or parked in a place where only non-contact charging control can be performed.

<Reservation charge>
The ECU 190 is set to a reserved charge that completes charging at a preset time (hereinafter referred to as a set time) even when the vehicle 100 is in a state where contact charge control and non-contact charge control can be executed. If so, the charging time is estimated, and the time retroactive by the amount of the charging time estimated from the set time is set as the charging start time. If the current time has not reached the charging start time, the ECU 190 waits until the charging start time is reached, and executes the charging control when the current time reaches the charging start time.

The set time may be set, for example, by an input operation on the touch panel display 170 by the user, and may be stored as the set time in a predetermined storage area of the memory 192. Alternatively, the set time may be stored in advance in a predetermined storage area of the memory 192 of the ECU 190.

The ECU 190 has information indicating that the reserved charging execution flag is on (that is, information indicating that the reserved charging is set) when the setting of the reserved charging is requested by the operation of the touch panel display 170 by the user. ) Is stored in the memory 192. The user can, for example, select either one of the contact charge control and the non-contact charge control by operating the touch panel display 170 to request the reserved charge setting. The ECU 190 stores information about the type of charge control executed as reserved charging in response to the user's request in the memory 192 together with the above-mentioned set time and information indicating that the reserved charging is set.

The ECU 190 executes, for example, information indicating that the non-contact charge control is in a state in which the non-contact charge control can be executed and that the reserved charge is set in the predetermined storage area of the memory 192, and the non-contact charge control as the reserved charge. When the information indicating that is selected and the set time are stored, the charging time required for the charging of the power storage device 120 to be completed is estimated. The ECU 190 sets the charging start time using the estimated charging time and the set time. If the current time has not reached the charging start time, the ECU 190 executes sleep control and waits until the charging start time is reached. The sleep control is, for example, a state in which the use of some of the functions of the vehicle 100 is restricted, and the power consumption of the plurality of electric devices mounted on the vehicle 100 is lower than that before the restriction. Control that puts a part in hibernation. Then, when the current time reaches the charging start time, the ECU 190 returns from the sleep control (that is, stops the sleep control) and executes the non-contact charging control at the charging start time.

Alternatively, the ECU 190 executes, for example, information indicating that the contact charge control is in a state in which the contact charge control can be executed and that the reserved charge is set in the predetermined storage area of the memory 192, and the contact charge control as the reserved charge. If the information indicating that is selected and the set time are stored, the charging time is estimated. The ECU 190 sets the charging start time using the estimated charging time and the set time. If the current time has not reached the charging start time, the ECU 190 executes sleep control until the charging start time is reached. When the current time reaches the charging start time, the ECU 190 returns from the sleep control and executes the contact charging control at the charging start time. It should be noted that the return from the sleep control may be performed at a time before the charging start time.

In the vehicle 100 having the above configuration, when the reserved charging is set so that the charging is completed at the set time (scheduled departure time) as described above, there is a deviation between the estimated charging time and the actual charging time. May occur.

FIG. 3 is a diagram for explaining the difference between the estimated charging time and the actual charging time. As shown in FIG. 3, when the charging connector 310 is connected to the inlet 110 (the time of the plug-in in FIG. 3), information indicating that reserved charging is set and contact charging control as reserved charging are executed. If the information indicating that the setting time is selected and the set time are stored, the charging time is estimated.

The ECU 190 acquires, for example, the SOC of the power storage device 120 and the charging power at the time of executing the contact charging control. The ECU 190 calculates the SOC using, for example, the current, voltage, and temperature of the power storage device 120. As a method for calculating the SOC, various known methods such as a method based on current value integration (coulomb count) or a method based on estimation of open circuit voltage (OCV) can be adopted.

The ECU 190 acquires charging power based on, for example, a pilot signal (CPLT) received from the charging stand 200. The ECU 190 calculates the amount of electric power required to raise the SOC of the power storage device 120 to the upper limit value. The ECU 190 calculates the time required to charge the required amount of electric power with the acquired charging power as the estimated charging time.

However, the actual charging power may vary due to variations (individual differences) of parts provided on the power transmission path during execution of contact charge control. As a result, as shown in FIG. 3, for example, when the power storage device 120 is charged with a power higher than the acquired charging power, the actual charging time (actually required charging time) becomes shorter than the estimated charging time. , There may be a discrepancy between the actual charge time and the estimated charge time. Similarly, when the power storage device 120 is charged with a power lower than the acquired charging power due to the variation of the parts provided on the power transmission path at the time of executing the contact charge control, the actual charging time is longer than the estimated charging time. Also becomes longer, and there may be a discrepancy between the actual charging time and the estimated charging time. Such a difference between the actual charge time and the estimated charge time may occur even when the non-contact charge control is executed.

In order to eliminate such a deviation, for example, it is conceivable to calculate a correction value for correcting the charging power by using the deviation between the actual charging time and the estimated charging time.

The ECU 190 calculates the actual charge power from, for example, the amount of electric power supplied to the power storage device 120 from the start to the completion of charging and the actual charge time. The ECU 190 calculates the actual charging time from, for example, the time when charging is started and the time when charging is completed. The ECU 190 calculates the correction value using the difference between the actual charge power and the charge power used for calculating the estimated charge time. For example, the ECU 190 gently charges the corrected charging power by setting an upper limit value and a lower limit value with respect to the amount of change of the calculated correction value from the previous value while setting the initial value of the correction value to zero. Get closer to the true value of electricity.

FIG. 4 is a diagram showing an example of a change in charging power when contact charging control is repeatedly executed. The vertical axis of FIG. 4 shows the charging power. The horizontal axis of FIG. 4 indicates the number of times of charging. As shown in FIG. 4, as the number of times of charging increases, the corrected charging power gradually changes to approach the true value. By correcting the charging power in this way, the discrepancy between the estimated charging time and the actual charging time is eliminated, and the charging time can be estimated with high accuracy. Therefore, for example, the charging of the power storage device 120 can be completed immediately before the set time.

However, since the power transmission path from the system power supply 500 to the power storage device 120 is different between the case where the contact charge control is executed and the case where the non-contact charge control is executed, it is assumed that the same degree of deviation occurs in the charge control between the two. Even if the charging time is estimated, it may not be possible to estimate the charging time with high accuracy.

Below, an example of the corrected change of the charge power when the contact charge control and the non-contact charge control are executed alternately will be described. FIG. 5 is a diagram showing an example of a change in charging power when contact charging control and non-contact charging control are alternately executed. The vertical axis of FIG. 5 shows the charging power. The horizontal axis of FIG. 5 indicates the number of times of charging.

As shown in FIG. 5, the charging power corrected by executing the contact charging control for the first time (first time) approaches (increases) the true value of the charging power at the time of contact charging control, whereas 2 The charging power corrected by the non-contact charging control being executed at the second time approaches (decreases) the true value of the charging power at the time of the non-contact charging control. As a result, the contact charge control and the non-contact charge control are alternately executed, so that the corrected charge power does not converge to any true value. Therefore, the difference between the estimated charging time and the actual charging time cannot be eliminated, and the charging time may not be estimated with high accuracy.

Further, even when the same non-contact charging control is executed, the relative positions of the power transmitting device 400 and the power receiving device 150 change depending on the parking position of the vehicle 100, so that the same degree of deviation occurs even though they have different relative positions. Even if the charging time is estimated, it may not be possible to estimate the charging time with high accuracy.

Therefore, in the present embodiment, the ECU 190 operates as follows. That is, when the reserved charge by the contact charge control is set, the ECU 190 calculates the charge time required to complete the charge of the power storage device 120 when the contact charge control is executed by using the first correction value. When the reserved charging by the non-contact charging control is set, the ECU 190 sets the charging time at the time of executing the non-contact charging control by using the second correction value corresponding to the relative position between the power transmitting device 400 and the power receiving device 150. calculate. When the reserved charge by the contact charge control is completed, the ECU 190 calculates the first correction value by using the difference between the calculated charge time and the actual charge time. When the reserved charging by the non-contact charging control is completed, the ECU 190 is associated with the relative position between the power transmitting device 400 and the power receiving device 150 by using the difference between the calculated charging time and the actual charging time. The second correction value is calculated.

In this way, when the reserved charge by the contact charge control is set, the charging time is calculated using the first correction value, and when the reserved charge by the non-contact charge control is set, the second correction value is set. Since the charging time is calculated using this, the charging time can be estimated with high accuracy in any case. Further, since the second correction value is calculated in association with the relative position between the power transmission device 400 and the power reception device 150 when the reserved charging is completed, the power transmission device 400 and the power reception device 150 are calculated according to the parking position of the vehicle 100. The charging time can be estimated with high accuracy even when the relative position of is changed.

Hereinafter, the control process executed by the ECU 190 mounted on the vehicle 100 according to the present embodiment will be described with reference to FIG. FIG. 6 is a flowchart showing a control process executed by the ECU 190 in the present embodiment.

At step 100 (hereinafter, step is referred to as S) 100, the ECU 190 determines whether or not the charging start condition is satisfied. The ECU 190 may determine, for example, that the charging start condition is satisfied when the charging connector 310 is connected to the inlet 110. Alternatively, the ECU 190 starts charging when the relative positional relationship between the power transmitting device 400 and the power receiving device 150 is within a predetermined relative positional relationship (that is, the horizontal distance and the vertical distance are within the predetermined range). It may be determined that the condition is satisfied. When it is determined that the charging start condition is satisfied (YES in S100), the process is transferred to S102.

In S102, the ECU 190 determines whether or not there is a reserved charge setting. The ECU 190 determines, for example, that the reserved charge is set when the set time is stored and the reserved charge execution flag is on. If it is determined that there is a reserved charge setting (YES in S102), the process is transferred to S108. On the other hand, when it is determined that the reserved charge is not set (NO in S102), the process is transferred to S104.

In S104, the ECU 190 executes charge control. The ECU 190 executes, for example, charge control that can be executed by either contact charge control or non-contact charge control. In addition, for example, when both contact charge control and non-contact charge control can be executed, the ECU 190 performs a preset charge control or a charge control set in advance by the user and having a higher priority. It may be executed, or the user may be requested to select the charge control, and the selected charge control may be executed according to the request.

In S106, the ECU 190 determines whether or not charging is completed. For example, the ECU 190 may determine that charging is complete when the SOC of the power storage device 120 exceeds the threshold value, or determine that charging is complete when the charging connector 310 is removed from the inlet 110. Alternatively, it may be determined that the charging is completed when the relative positional relationship between the power transmitting device 400 and the power receiving device 150 is no longer a predetermined relative positional relationship. When it is determined that charging is completed (YES in S106), this process is terminated. On the other hand, when it is determined that charging is not completed (in S106), the process is returned to S106.

In S108, the ECU 190 determines whether or not reserved charging by contact charge control is set. For example, when the information indicating that the contact charge control is selected as the reserved charge is stored in the memory 192, the ECU 190 determines that the reserved charge by the contact charge control is set. When the ECU 190 determines that the reserved charge by the contact charge control is set (YES in S108), the process is transferred to S110.

In S110, the ECU 190 calculates the charging time by contact charging control using the first correction value. The first correction value is used to correct the charging power of the contact charge control when calculating the estimated charge time by the contact charge control. The initial value of the first correction value is, for example, zero. The ECU 190 corrects the charging power by adding the first correction value to, for example, the initial value of the charging power of the contact charging control (for example, the charging power based on the pilot signal from the charging stand 200). The ECU 190 calculates the time required for the charging of the power storage device 120 to be completed as the estimated charging time, assuming that the contact charging control is executed with the corrected charging power. The ECU 190 calculates, for example, the amount of electric power required to raise the SOC of the power storage device 120 from the current value to exceed the threshold value, and determines the time required to charge the amount of electric power with the corrected charging power. Calculated as an estimated charge time.

When it is determined that the reserved charge by the contact charge control is not set (that is, the reserved charge by the non-contact charge control is set) (NO in S108), the process is transferred to S112.

In S112, the ECU 190 estimates the charging time by the non-contact charging control using the second correction value. The second correction value is used to correct the charging power of the non-contact charging control when calculating the estimated charging time by the non-contact charging control. The second correction value is a value with the relative position between the power transmission device 400 and the power reception device 150 as a parameter. That is, the ECU 190 sets the second correction value based on the relative position between the power transmission device 400 and the power reception device 150.

For example, the ECU 190 sets the second correction value from the relative position between the power transmission device 400 and the power receiving device 150 by using a map showing the relationship between the relative position between the power transmission device 400 and the power receiving device 150 and the second correction value. The ECU 190 calculates, for example, the distance in the X direction and the distance in the Y direction between the power transmission device 400 and the power receiving device 150. The ECU 190 sets a second correction value according to the calculated distance in the X direction and the distance in the Y direction.

The ECU 190 sets the second correction value by using, for example, a map showing the relationship between the distance in the X direction, the distance in the Y direction, and the second correction value.

FIG. 7 is a diagram showing the relationship between the relative position of the power transmitting device 400 and the power receiving device 150 and the second correction value. As shown in FIG. 7, the distance in the X direction is divided into a section X1 from −b to −a, a section X2 from −a to a, and a section X3 from a to b. It is assumed that a is a positive value smaller than b. Similarly, the distance in the Y direction is divided into a section Y1 from −b to −a, a section Y2 from −a to a, and a section Y3 from a to b.

Then, the second correction value c (1,1) corresponding to the section X1 and the section Y1, the second correction value c (1,2) corresponding to the section X1 and the section Y2, and the section X1 and the section Y3. The second correction value c (1,3) corresponding to the section X2, the second correction value c (2,1) corresponding to the section X2 and the section Y1, and the second correction value c corresponding to the section X2 and the section Y2. (2,2), the second correction value c (2,3) corresponding to the section X2 and the section Y3, the second correction value c (3,1) corresponding to the section X3 and the section Y1, and the section. The second correction value c (3,2) corresponding to the section X3 and the section Y2 and the second correction value c (3,3) corresponding to the section X3 and the section Y3 are set. The second correction value shown in FIG. 7 has an initial value of zero and is updated by an update process described later.

The ECU 190 specifies which of the sections X1 to X3 the distance in the X direction corresponds to, and which of the sections Y1 to Y3 the distance in the Y direction corresponds to, and determines the second correction value corresponding to the specified section. Set.

The ECU 190 corrects the charging power by adding a second correction value to, for example, an initial value of the charging power of the non-contact charging control (for example, the charging power based on the information from the power transmission device 400). The ECU 190 calculates the time required for the charging of the power storage device 120 to be completed as the estimated charging time, assuming that the non-contact charging control is executed with the corrected charging power.

Returning to FIG. 6, in S114, the ECU 190 determines the charging start time. The ECU 190 determines, for example, a time retroactive by the amount of the charging time calculated from the set time as the charging start time.

In S116, the ECU 190 determines whether or not the current time has reached the charging start time. When it is determined that the current time has reached the charging start time (YES in S116), the process is transferred to S120. If it is determined that the current time has not reached the charging start time (NO in S116), the process is transferred to S118.

In S118, the ECU 190 executes sleep control. Since the sleep control is as described above, the detailed description thereof will not be repeated. The ECU 190 then returns the process to S118.

In S120, the ECU 190 executes charge control. The ECU 190 executes the contact charge control when the reserved power reception by the contact charge control is set. On the other hand, the ECU 190 executes the non-contact charge control when the reserved charge by the non-contact charge control is set.

In S122, the ECU 190 determines whether or not charging is completed. Since the method for determining whether or not charging is completed is the same as the process of S106, the detailed description thereof will not be repeated. When it is determined that charging is completed (YES in S122), the process is transferred to S124. On the other hand, when it is determined that charging is not completed (NO in S122), the process is returned to S122.

In S124, the ECU 190 determines whether or not the completed charge control is contact charge control. The ECU 190 may determine, for example, that the completed charge control is the contact charge control when the reserved charge by the contact charge control is set. When it is determined that the completed charge control is contact charge control (YES in S124), the process is transferred to S126.

In S126, the ECU 190 updates the first correction value of the contact charge control. The ECU 190 calculates the actual charge power from, for example, the actual charge time and the charge power amount based on the change amount of the SOC. The ECU 190 calculates the difference obtained by subtracting the estimated charge power from the calculated actual charge power as the first charge power difference. When the calculated first charging power difference is a value between a predetermined upper limit value and a predetermined lower limit value, the ECU 190 newly adds a value obtained by adding the first charging power difference to the first correction value. 1 Set to the correction value. When the calculated first charge power difference exceeds the upper limit value, the ECU 190 sets a value obtained by adding the upper limit value to the first correction value as a new first correction value. Further, when the calculated first charge power difference is less than the lower limit value, the ECU 190 sets a value obtained by adding the lower limit value to the first correction value as a new first correction value. The ECU 190 multiplies the first charging power difference by a predetermined first coefficient (<1) regardless of the magnitude of the first charging power difference, and adds the first correction value to the calculated value. The added value may be set as a new first correction value.

On the other hand, when it is determined that the completed charge control is not contact charge control (that is, non-contact charge control) (NO in S124), the process is transferred to S128.

In S128, the ECU 190 updates the second correction value of the non-contact charge control. The ECU 190 calculates the actual charge power from, for example, the actual charge time and the charge power amount based on the change amount of the SOC. The ECU 190 calculates the difference obtained by subtracting the estimated charge power from the calculated actual charge power as the second charge power difference. When the calculated second charging power difference is a value between a predetermined upper limit value and a predetermined lower limit value, the ECU 190 newly adds a value obtained by adding the second charging power difference to the second correction value. 2 Set to the correction value. When the calculated second charging power difference exceeds the upper limit value, the ECU 190 sets a value obtained by adding the upper limit value to the second correction value as a new second correction value. Further, when the calculated second charging power difference is less than the lower limit value, the ECU 190 sets a value obtained by adding the lower limit value to the second correction value as a new second correction value. The ECU 190 multiplies the second charging power difference by a predetermined second coefficient (<1) regardless of the magnitude of the second charging power difference, and adds the second correction value to the calculated value. The added value may be set as a new second correction value.

Further, the ECU 190 associates the set new second correction value with the relative position between the power transmission device 400 and the power reception device 150. That is, the ECU 190 specifies the corresponding second correction value from the section in the X direction and the section in the Y direction specified in the process of S112, and updates the specified second correction value to a new second correction value. .. For example, when the distance in the X direction is the distance in the section X1 and the distance in the Y direction is the distance in the section Y1, the ECU 190 newly adds the value of the second correction value c (1,1). Update to the value of the second correction value (see FIG. 7).

The operation of the ECU 190 mounted on the vehicle 100 according to the present embodiment based on the above configuration and the flowchart will be described with reference to FIGS. 8 and 9.

When the charge start condition is satisfied (YES in S100) and the reserved charge by contact charge control is set (YES in S102 and YES in S108), the charge time using the first correction value is used. Calculated (S110). Then, the charging start time is determined using the calculated charging time and the set time (S114), and if the current time has not reached the charging start time (NO in S116), the sleep control is executed. (S118). On the other hand, when the current time has reached the charging start time (YES in S116), the charging control is executed (S120), and when it is determined that the charging is completed (YES in S122), the completed charging is performed. When the control is contact charge control (YES in S124), the first correction value is updated (S126).

On the other hand, when the reserved charge by the non-contact charge control is set (YES in S102 and NO in S108), the second correction value corresponding to the relative position between the power transmission device 400 and the power receiving device 150 is used. The charging time is calculated (S110). Then, the charging start time is determined using the calculated charging time and the set time (S114), and when the current time reaches the charging start time (YES in S116), the charging control is executed (YES). S120), when it is determined that charging is completed (YES in S122), and when the completed charging control is non-contact charging control (YES in S126), the relative between the power transmitting device 400 and the power receiving device 150. The second correction value corresponding to the position is updated (S128).

FIG. 8 is a diagram showing an example of changes in the charging power of the contact charging control and the charging power of the non-contact charging control. Note that FIG. 8 shows a change in the charging power of the non-contact charging control when the relative position between the power transmitting device 400 and the power receiving device 150 is a predetermined relative position. The vertical axis of FIG. 8 shows the charging power. The horizontal axis of FIG. 8 indicates the number of times of charging. LN1 (solid line) in FIG. 8 shows the change in the charging power of the contact charge control with respect to the change in the number of times of charging. LN2 (dashed line) in FIG. 8 shows the change in the charging power of the contact charge control with respect to the change in the number of times of charging.

The first correction value and the second correction value are individually stored in the memory. Therefore, as shown in LN1 of FIG. 8, as the number of reserved charges by contact charge control increases, the charge power approaches (increases) from the initial value A to the true value B of the charge power of contact charge control. ). On the other hand, as shown in LN2 of FIG. 8, the charging power approaches the true value C of the charging power of the non-contact charging control from the initial value A as the number of reserved chargings by the non-contact charging control increases. (Decreasing).

FIG. 9 is a diagram showing an example of a change in charging power of non-contact charging control when the relative positions of the power transmitting device 400 and the power receiving device 150 are different. Note that FIG. 9 shows changes in the charging power when the relative position between the power transmitting device 400 and the power receiving device 150 is the first relative position and the charging power when the relative position is the second relative position. The vertical axis of FIG. 9 shows the charging power. The horizontal axis of FIG. 9 indicates the number of times of charging. LN3 (solid line) in FIG. 9 shows the change in the charging power of the non-contact charging control at the first relative position with respect to the change in the number of charging times. LN4 (dashed line) in FIG. 9 shows the change in the charging power of the non-contact charging control at the second relative position with respect to the change in the number of charging times.

The second correction value is stored in the memory in association with the relative position between the power transmission device 400 and the power reception device 150. Therefore, as shown in LN3 of FIG. 9, in the first relative position, as the number of reserved charges by the non-contact charge control increases, the charging power becomes the non-contact charge control at the first relative position from the initial value A. It approaches (increases) the true value D of the charging power of. On the other hand, as shown in LN4 of FIG. 9, in the second relative position, as the number of reserved charges by the non-contact charge control increases, the charging power does not change from the initial value A to the second relative position. It approaches (decreases) the true value E of the charging power of the contact charge control.

As described above, according to the vehicle 100 according to the present embodiment, when the reserved charging by the contact charging control is set, the charging time is calculated using the first correction value, and the reserved charging by the non-contact charging control is performed. When is set, the charging time is calculated using the second correction value, so that the charging time can be estimated with high accuracy in either case. Further, since the second correction value is calculated in association with the relative position between the power transmission device 400 and the power reception device 150 when the reserved charging is completed, the power transmission device 400 and the power reception device 150 are calculated according to the parking position of the vehicle 100. The charging time can be estimated with high accuracy even when the relative position of is changed. Therefore, it is possible to provide a vehicle that estimates the charging time with high accuracy according to the state of external charging.

Hereinafter, modification examples will be described.
In the above-described embodiment, the case where the vehicle 100 is an electric vehicle has been described as an example, but any vehicle that can be charged by contact charging and non-contact charging to an in-vehicle power storage device using an external power source may be used. , Especially not limited to electric vehicles. For example, the vehicle 100 may be a hybrid vehicle or a vehicle whose drive source is only an engine.

Further, in the above-described embodiment, the charge control of the magnetic field resonance method and the configuration for executing the charge control have been described as one aspect of the non-contact charge control, but the charge control is not particularly limited to the magnetic field resonance method. Instead, for example, an electromagnetic induction method, a radio wave reception method, or the like may be used as the non-contact charge control.

Further, in the above-described embodiment, the second correction value is set in correspondence with the misalignment in the horizontal direction (that is, the X direction and the Y direction). However, in addition to the horizontal direction, the vertical direction (that is, that is). The second correction value may be set in correspondence with the misalignment in the Z direction), or the second correction may be set in correspondence with the misalignment in at least one of the X direction, the Y direction, and the Z direction. A value may be set.

In addition, the above-mentioned modification may be carried out by combining all or a part thereof.
It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 Vehicle charging system, 5A, 8A resonator, 5L power receiving coil, 5R rectifier, 5T, 8T capacitor, 8L power transmission coil, 8R converter, 100 vehicles, 110 inlet, 120 power storage device, 130 charger, 140 PCU, 150 power receiving Device, 170 touch panel display, 180 communication device, 190 ECU, 192 memory, 200 charging stand, 300 charging cable, 310 charging connector, 400 power transmission device, 402 communication unit, 404 power transmission unit, 406 camera, 408 control unit, 500 system power supply ..

Claims (1)

Power storage device and
An inlet that can be connected to a charging connector connected to the external power supply of the vehicle,
A power receiving device that can receive power in a non-contact manner from the power transmission device outside the vehicle,
Contact charge control for charging the power storage device using the power supplied from the power source via the inlet, and charging the power storage device using the power received from the power transmission device via the power receiving device. It is equipped with a control device that can selectively execute non-contact charge control.
The control device is
When the reserved charge by the contact charge control is set, the charging time required to complete the charge of the power storage device when the contact charge control is executed is calculated by using the first correction value.
When the reserved charge is set by the contactless charge control, the charge time at the time of executing the contactless charge control using the second correction value corresponding to the relative position between the power transmission device and the power receiving device. Is calculated,
When the reserved charging by the contact charge control is completed, the first correction value is calculated using the difference between the calculated charging time and the actual charging time.
When the reserved charging by the non-contact charging control is completed, the difference between the calculated charging time and the actual charging time is used to correspond to the relative position between the power transmission device and the power receiving device. A vehicle that calculates the second correction value.

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