Electric Vehicles

Abstract

To properly address interruption of charging by operation of a switch of a cable device for connecting a charging device for charging an on-vehicle power storage device and an external power source.SOLUTION: An electric car includes a control device that controls a charging device when charging a power storage device with power from an external power source, and that calculates a remaining charging time required to fully charge the power storage device on the basis of supply power supplied from the external power source. When the control device receives a connection signal of a connection cancel state by operation of a connection switch during charging the power storage device by using power from the external power source with the charging device being connected to the external power source via a cable device, if connection between a vehicle-side connector and a cable-side connector is detected, the control device calculates the remaining charging time while holding the supply power prior to the reception of the connection signal of the connection cancel state.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an electric vehicle, and more particularly to an electric vehicle equipped with a charging device that charges an on-board power storage device using electric power from an external power source. [Background technology]

[0002] Conventionally, for this type of electric vehicle, when charging an on-board power storage device using power from an external power source, a charging schedule for the charging current and charging time for the power storage device has been proposed based on the required charge amount for the power storage device and a scheduled charging end time specified by the user (see, for example, Patent Document 1). In this electric vehicle, the charging schedule is determined based on the minimum charging current, which is the minimum charging current that can supply the required charge amount to the power storage device within the chargeable time from the current time to the scheduled charging end time within the range of current that can be supplied from the external power source. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-81324 A Summary of the Invention [Problem to be solved by the invention]

[0004] In many of the above-mentioned electric vehicles, the time until charging is completed (remaining charge time) is calculated using power supplied from an external power source during charging. Some electric vehicles use a cable device to connect an external power source to an on-board charging device to charge an electricity storage device. In some cases, the cable device is provided with a relay attached to a cable-side power line that connects the power source-side power line of the external power source to a vehicle-side power line to which the charging device is attached, and a switch that cuts off the power source-side power line and the vehicle-side power line by the relay. In this case, when a switch operation is performed while the electricity storage device is being charged with power from the external power source to cut off the power source-side power line and the vehicle-side power line, the supply power becomes zero even though the user has not removed the cable device, and the remaining charge time is cleared. In this case, when charging is resumed by operating the switch again, it is processed as a new charge, which gives the user a sense of incongruity.

[0005] The main object of the electric vehicle of the present invention is to more appropriately respond when charging is interrupted by operation of a switch on a cable device that connects an external power source to a charging device that charges an on-board power storage device. [Means for solving the problem]

[0006] In order to achieve the above-mentioned main object, the electric vehicle of the present invention employs the following means.

[0007] The electric vehicle of the present invention comprises: an electric vehicle including: a power storage device; a charging device capable of charging the power storage device using electric power from an external power source; a vehicle side connector connectable to a cable side connector of a cable device that connects the external power source to the charging device; a connection detection device that detects whether or not the vehicle side connector and the cable side connector are connected; and a control device that controls the charging device when the power storage device is charged using electric power from the external power source and calculates a remaining charging time required to fully charge the power storage device based on the supply power supplied from the external power source, the cable device has a connection switch that connects and disconnects a power line from an external power source to the charging device and transmits a connection signal to the control device indicating a connection state in which the power line from the external power source to the charging device is connected and a disconnection state in which the connection is disconnected, when the control device receives a connection signal of the disconnected state by operating the connection switch while the charging device is being charged using power from the external power source with the charging device connected to the external power source via the cable device, and when the connection detection device detects the connection between the vehicle side connector and the cable side connector, the control device holds the supplied power before receiving the connection signal of the disconnected state and calculates the remaining charging time. It is characterized by:

[0008] The electric vehicle of the present invention includes a power storage device, a charging device capable of charging the power storage device using electric power from an external power source, a vehicle-side connector connectable to a cable-side connector of a cable device connecting the external power source to the charging device, a connection detection device that detects whether the vehicle-side connector and the cable-side connector are connected, and a control device that controls the charging device when charging the power storage device using electric power from the external power source and calculates the remaining charging time required to fully charge the power storage device based on the supplied electric power supplied from the external power source. The cable device has a connection switch that connects and disconnects a power line from the external power source to the charging device and transmits a connection signal to the control device indicating a connected state in which the power line from the external power source to the charging device is connected and a disconnected state in which the connection is disconnected. When the control device receives a connection signal for the disconnected state by operating the connection switch while the charging device is being charged using electric power from the external power source with the charging device connected to the external power source via the cable device, when the connection detection device detects the connection between the vehicle-side connector and the cable-side connector, the control device holds the supplied electric power before receiving the connection signal for the disconnected state and calculates the remaining charging time. The remaining charging time in this case is also held. This allows the remaining charging time to be continuously calculated when charging is resumed by operating the connection switch again to return to the connected state. As a result, it is possible to more appropriately handle the case where charging is interrupted by operating the connection switch of the cable device that connects the charging device that charges the on-board power storage device to the external power source.

[0009] In the electric vehicle of the present invention, when the control device receives the connection signal indicating the disconnected state while the power storage device is being charged, the control device may clear the supply of power when the connection detection device detects that the connection between the vehicle-side connector and the cable-side connector has been disconnected. This makes it possible to more appropriately clear the remaining charging time.

[0010] In the electric vehicle of the present invention, the control device may notify the user of the remaining charging time. In this way, the remaining charging time may be displayed on a display, or the charging time may be output as a voice. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram showing the outline of the configuration of an electric vehicle 20 according to an embodiment of the present invention. [Diagram 2] 2 is a circuit diagram showing an example of a power conversion circuit 52. FIG. [Diagram 3] 4 is a flowchart showing an example of a remaining charge time calculation process executed by an electronic control unit 70. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Next, a mode for carrying out the present invention will be described using examples. EXAMPLES

[0013] 1 is a diagram showing an outline of the configuration of an electric vehicle 20 according to an embodiment of the present invention. As shown in the figure, the electric vehicle 20 of the embodiment includes a motor 32, an inverter 34, a battery 36, a boost converter 40, a high-voltage power line 42, a low-voltage power line 44, a system main relay 38, a charger 50, a charging power line 51, a vehicle-side inlet 54, and an electronic control unit 70. A connector 254 of a commercial power source 220 is connected to the vehicle-side inlet 54 via a charging cable device 120.

[0014] The motor 32 is configured as a synchronous generator motor, and includes a rotor in which a permanent magnet is embedded and a stator around which a three-phase coil is wound. The rotor of the motor 32 is connected to a drive shaft 26 that is connected to the drive wheels 22a, 22b via a differential gear 24.

[0015] The inverter 34 is connected to the motor 32 and is also connected to the high-voltage power line 42. The inverter 34 is configured as a well-known inverter circuit having six transistors and six diodes.

[0016] The battery 36 is configured as, for example, a lithium ion secondary battery or a nickel-hydrogen secondary battery, and is connected to a low-voltage side power line 44 .

[0017] The boost converter 40 is connected to a high-voltage power line 42 and a low-voltage power line 44, and is configured as a well-known boost-buck converter circuit having two transistors, two diodes, and a reactor.

[0018] A high-voltage side capacitor 46 is connected to the positive and negative busbars of the high-voltage side power line 42. A low-voltage side capacitor 48 is attached to the positive and negative busbars of the low-voltage side power line 44. A system main relay 38 is attached to the low-voltage side power line 44. This system main relay 38 has a positive side relay SMRB provided on the positive busbar of the low-voltage side power line 44, a negative side relay SMRG provided on the negative busbar of the low-voltage side power line 44, and a pre-charge circuit in which a pre-charge resistor R and a pre-charge relay SMRP are connected in series to bypass the negative side relay SMRG. A DC / DC converter 82 is connected to the low-voltage side power line 44, and exchanges power with an auxiliary power line 84 to which an auxiliary battery 86 and an auxiliary device (not shown) are connected.

[0019] The charger 50 includes a charging power line 51 having one end connected to the boost converter 40 side (motor 32 side) via the system main relay 38 of the low-voltage side power line 44 and the other end connected to a vehicle side inlet 54, and a power conversion circuit 52 attached to the charging power line 51. The power conversion circuit 52 is a well-known power conversion circuit that converts AC power from the commercial power source 20 into DC power of a desired voltage capable of charging the battery 35. For example, as shown in FIG. 2, the power conversion circuit 52 may include a commercial power source side AC / DC conversion circuit 52a that converts AC power from the commercial power source 220 into DC power of a desired voltage, a smoothing capacitor 52b, a DC / AC conversion circuit 52c that converts the DC power into AC power, a transformer 52d, and a battery side AC / DC conversion circuit 52e that converts the AC power into DC power.

[0020] In addition to the charging power line 51, the vehicle-side inlet 54 is connected to a vehicle-side ground line 57 having the other end grounded, a vehicle-side connection line 58 having the other end connected to the electronic control unit 70, a vehicle-side communication line 60 having the other end connected to the electronic control unit 70, and a lid signal line 62 connected to a lid sensor 56 attached to the vehicle-side inlet 54 and having the other end connected to the electronic control unit 70. The vehicle-side ground line 57 and the vehicle-side connection line 58 are connected via a resistor. The lid sensor 56 is a sensor that detects whether a lid (cover) covering the vehicle-side inlet 54 is in an open or closed state.

[0021] The charger 50 charges the battery 36 with power from the commercial power source 220 when the vehicle connector 154a of the charging cable device 120 is connected to the vehicle side inlet 54 and the power connector 154b of the charging cable device 120 is connected to the power source side connector 254 on the commercial power source 220 side.

[0022] The charging cable device 120 includes a cable electronic control unit (hereinafter referred to as cable ECU) 130, a power supply circuit 132, a control pilot circuit 134, a vehicle connector 154a, a power supply connector 154b, a cable side power line 151, a charging relay 152 attached to the cable side power line 151, a cable side ground line 157, a cable side connection line 158, a connection switch 158a, and a cable side temperature detection line 162. When the vehicle connector 154a of the charging cable device 120 is connected to the vehicle side inlet 54 and the power supply connector 154b of the charging cable device 120 is connected to the power supply side connector 254 on the commercial power source 220 side, the charging power line 51 is connected to the power supply side power line 251 of the commercial power source 220 via the cable side power line 151. The vehicle-side ground line 57 is connected to the cable-side ground line 157, the vehicle-side connection line 58 is connected to the cable-side connection line 158, and the vehicle-side communication line 60 is connected to the cable-side communication line 160. The cable-side temperature detection line 162 is connected to a power-supply-side temperature detection line 262 connected to a temperature sensor 256 attached to the power-supply-side connector 254. The power supply circuit 132 is connected to the cable-side power line 151, and when the power supply connector 154b of the charging cable device 120 is connected to the power supply-side connector 254 on the commercial power supply 220 side and the cable-side power line 151 is connected to the power supply-side power line 251 of the commercial power supply 220, the power supply circuit 132 converts AC power supplied from the commercial power supply 220 into DC power of a predetermined voltage and supplies the DC power to the cable ECU 130 and the like. The control pilot circuit 134 has an oscillation circuit (not shown), and outputs a signal transmitted from the oscillation circuit to the cable-side communication line 160 with a duty changed according to a control signal from the cable ECU 130. One end of the connection switch 158a is connected to the vehicle-side ground line 57, and the other end is connected via a resistor to the cable-side connection line 158 which is connected to the vehicle-side connection line 58, and both ends of the connection switch 158a are connected via a resistor. The connection switch 158a is configured as a push-down switch that is turned off when pushed down near the vehicle connector 154a.The cable ECU 130 is configured as a microprocessor centered on a CPU (not shown), and includes, in addition to the CPU, a ROM for storing processing programs, a RAM for temporarily storing data, an input / output port, a communication port, and the like. A cable-side temperature detection line 142 is connected to the cable ECU 130, and a power connector temperature is input from a temperature sensor 240 attached to a power connector 254. A signal is also input to the cable ECU 130 from a leakage detection circuit (not shown) attached to a cable-side power line 151. A drive signal is output from the cable ECU 130 to a charging relay 152. The cable ECU 130 also communicates with a control pilot circuit 134. The cable ECU 130 transmits a control signal to the control pilot circuit 134, which indicates a chargeable current as a duty for the rated current, based on information (such as a rated current and a power connector temperature) obtained from the commercial power source 220. The control pilot circuit 134 performs duty control on a signal transmitted from the oscillator circuit based on a control signal received from the cable ECU 130, and transmits the signal to the electronic control unit 70 via the cable side communication line 160 and the vehicle side communication line 60. When the connection switch 158a is pressed down and turned off, the cable ECU 130 turns off the charging relay 152 based on a signal from the electronic control unit 70 that detects that the connection switch 158a has been turned off.

[0023] The electronic control unit 70 is configured as a microprocessor centered around a CPU 72, and in addition to the CPU 72, includes a ROM 74 for storing processing programs, a RAM 76 for temporarily storing data, a flash memory (not shown), an input / output port (not shown), a communication port (not shown), etc.

[0024] Signals from various sensors are input to the electronic control unit 70 via input ports. Examples of signals input to the electronic control unit 70 include a rotational position θm from a rotational position detection sensor (e.g., resolver) 32a that detects the rotational position of the rotor of the motor 32, a voltage VB from a voltage sensor 36a attached between the terminals of the battery 36, and a current IB from a current sensor 36b attached to the output terminal of the battery 36. Other examples include a voltage VH of the high-voltage side capacitor 46 (high-voltage side power line 42) from a voltage sensor 46a attached between the terminals of the high-voltage side capacitor 46, and a voltage VL of the low-voltage side capacitor 48 (low-voltage side power line 44) from a voltage sensor 48a attached between the terminals of the low-voltage side capacitor 48. A supply voltage Vin from a voltage sensor 51a attached to a charging power line 51, a charging voltage Vchg from a voltage sensor 51b, a charging current Ichg from a current sensor 51b, and a voltage from a voltage sensor that detects a terminal voltage of a smoothing capacitor 52b in the power conversion device 52 are also input. The input port of the electronic control unit 70 is also connected to a vehicle-side connection line 58 connected to the vehicle-side inlet 54 and a lid signal line 62 from a lid sensor 56 attached to the vehicle-side inlet 54. The electronic control unit 70 also functions as a drive control device for the vehicle, and therefore receives input of information necessary for system startup and driving control. Examples of this information include a start signal from a start switch 77, a shift position from a shift position sensor that detects the operating position of a shift lever (not shown), an accelerator opening from an accelerator pedal position sensor that detects the amount of depression of an accelerator pedal (not shown), a brake pedal position from a brake pedal position sensor that detects the amount of depression of a brake pedal (not shown), and a vehicle speed from a vehicle speed sensor (not shown).

[0025] Various control signals are output via an output port from the electronic control unit 70. Examples of signals output from the electronic control unit 70 include a switching control signal to the transistors of the inverter 34, a switching control signal to the transistors of the boost converter 40, a drive control signal to the system main relay 38, a drive control signal to the charging relay 52, a display signal to a display 78 disposed on the instrument panel in front of the driver's seat, a lighting signal to a ready lamp 79, and a switching control signal to the transistors of the DC / DC converter 82.

[0026] The electronic control unit 70 communicates with the control pilot circuit 134 of the charging cable device 120 by connecting the communication line 60 connected to the communication port to the cable side communication line 160. The electronic control unit 70 calculates the chargeable current Iin that can be supplied to charge the battery 36 from the commercial power source 220 based on a duty-controlled transmission signal from the control pilot circuit 134, and calculates the chargeable power (infrastructure power) Pin based on the chargeable current Iin and the supply voltage Vin from the voltage sensor 51a. The electronic control unit 70 also calculates the storage ratio SOC of the battery 36 based on an integrated value of the current Ib of the battery 36 from the current sensor 36b. The storage ratio SOC is the ratio (percentage) of the amount of power that can be discharged from the battery 36 to the total capacity of the battery 36.

[0027] Next, an operation of the electric vehicle 20 of the embodiment thus configured will be described, in particular an operation for calculating the time required to finish charging the battery 36 (remaining charging time) while the battery 36 is being charged using power from the commercial power source 220. Fig. 3 is a flow chart showing an example of a remaining charging time calculation process executed by the electronic control unit 70 while the battery 36 is being charged using power from the commercial power source 220. This remaining charging time calculation process is executed when the vehicle connector 154a of the charging cable device 120 is connected to the vehicle-side inlet 54 and the power connector 154b of the charging cable device 120 is connected to the power-side connector 254 on the commercial power source 220 side to start charging the battery 36 with power from the commercial power source 220.

[0028] When the remaining charge time calculation process is executed, the electronic control unit 70 first determines whether or not a power outage has occurred on the commercial power source 220 side (infrastructure side) (step S100). This determination can be made based on whether or not power is being supplied to the power supply circuit 132.

[0029] When it is determined in step S100 that no power outage has occurred on the infrastructure side, it is determined whether or not the user has pressed down the connection switch 158a to turn it off (step S110). When the connection switch 158a is pressed down to turn it off, as described above, the cable ECU 130 turns off the charging relay 152. Note that the user does not operate the connection switch 158a during normal charging.

[0030] When it is determined in step S100 that the user has not pressed down (switched off) the connection switch 158a, the supply voltage Vin from the voltage sensor 51a and the chargeable current Iin based on the transmission signal from the control pilot circuit 134 are input (step S120), and the chargeable power (infrastructure power) Pin is calculated as the product of the supply voltage Vin and the chargeable current Iin (step S130). Then, the remaining charging time Tchg is calculated by dividing the free capacity of the battery 36 by the chargeable power (infrastructure power) Pin (step S160). The free space of the battery 36 can be calculated by multiplying the total capacity of the battery 36 by (100-storage ratio SOC) / 100. Then, the remaining charging time Tchg is notified by displaying it on the display 78 (step S170), and it is determined whether the battery 36 is being charged (step S200), and when it is determined that the battery 36 is being charged, the process returns to the process of determining whether a power outage has occurred on the infrastructure side in step S100. When no power outage occurs on the infrastructure side and the user has not operated the connection switch 158a, the processes of steps S100 to S130, S160, S170, and S200 are repeatedly executed during charging. Whether or not the battery 36 is being charged can be determined by determining that charging has ended when the charge ratio SOC of the battery 36 becomes 100%, when the remaining charging time Tchg becomes 0, when the connection between the vehicle-side inlet 54 and the vehicle connector 154a of the charging cable device 120 is released, or the like.

[0031] When it is determined in step S110 that the user has pressed down and turned off the connection switch 158a during charging, it is determined whether the connection between the vehicle-side inlet 54 and the vehicle connector 154a of the charging cable device 120 continues or has been released (unplugged) (step S140). As shown in Fig. 1, the electronic control unit 70 can determine, based on the voltage of the vehicle-side connection line 58, whether the vehicle-side inlet 54 and the vehicle connector 154a of the charging cable device 120 are connected and the connection switch 158a is on, whether the vehicle-side inlet 54 and the vehicle connector 154a are connected and the connection switch 158a is off, or whether the connection between the vehicle-side inlet 54 and the vehicle connector 154a has been released. When it is determined that the connection between the vehicle-side inlet 54 and the vehicle connector 154a of the charging cable device 120 continues, the chargeable power (infrastructure power) Pin before the connection switch 158a is operated is held (step S150), and the remaining charging time Tchg is calculated using the held chargeable power (infrastructure power) Pin (step S160). When the connection switch 158a is pressed down and turned off, the cable ECU 130 turns off the charging relay 152 based on a signal from the electronic control unit 70 that detects this, and the supply voltage Vin from the voltage sensor 51a becomes a value of 0. If the chargeable power (infrastructure power) Pin is calculated using this supply voltage Vin of value 0, the chargeable power (infrastructure power) also becomes a value of 0, and it becomes impossible to calculate the remaining charging time Tchg. In the embodiment, even when the connection switch 158a is pressed down and turned off, if the connection between the vehicle inlet 54 and the vehicle connector 154a of the charging cable device 120 continues, the chargeable power (infrastructure power) Pin before the connection switch 158a was turned off by operating the connection switch 158a is held and the remaining charging time Tchg is calculated so that the remaining charging time Tchg continues to be displayed without any sense of incongruity until the connection switch 158a is turned on again by operating the connection switch 158a and charging is resumed.When the remaining charging time Tchg is calculated in this way, the calculated remaining charging time Tchg is displayed on the display 78 to notify the user (step S170), and it is determined whether the battery 36 is being charged (step S200). If it is determined that the battery 36 is being charged, the process returns to step S100, which determines whether a power outage has occurred on the infrastructure side. When there is no power outage on the infrastructure side and the user operates the connection switch 158a to turn the switch off, the processes of steps S100, S110, S140 to S170, and S200 are repeatedly executed until the user operates the connection switch 158a again to turn the switch on, or until the connection between the vehicle-side inlet 54 and the vehicle connector 154a is released (disconnected). The remaining charging time Tchg calculated using the chargeable power (infrastructure power) Pin before the connection switch 158a is turned off is the same value because neither the free capacity of the battery 36 nor the chargeable power (infrastructure power) Pin changes.

[0032] If it is determined in step S140 that the connection between the vehicle inlet 54 and the vehicle connector 154a of the charging cable device 120 has been released (disconnected), the retained chargeable power (infrastructure power) Pin is cleared to a value of 0 (step S180), the display of the remaining charging time Tchg is canceled (step S190), and it is determined whether the battery 36 is being charged (step S200). In this case, since the connection between the vehicle inlet 54 and the vehicle connector 154a has been released (disconnected), it is determined that charging has ended and charging is not in progress, and therefore this process is terminated.

[0033] If it is determined in step S100 that a power outage has occurred on the infrastructure side, the calculated chargeable power (infrastructure power) Pin is cleared to a value of 0 (step S180), the display of the remaining charging time Tchg is cancelled (step S190), and it is determined whether or not the battery 36 is being charged (step S200). In this case, it may be determined that charging is in progress, or that charging has been completed.

[0034] In the electric vehicle 20 of the embodiment, when the connection switch 158a is pressed down and turned off by the user during charging, if the connection between the vehicle-side inlet 54 and the vehicle connector 154a continues, the chargeable power (infrastructure power) Pin before the connection switch 158a is turned off is held and the remaining charging time Tchg is calculated. This makes it possible to notify the user of the calculated remaining charging time Tchg by displaying it on the display 78, and to prevent the user from feeling uncomfortable when the remaining charging time Tchg is not calculated and displayed on the display 78. As a result, when the connection switch 158a is pressed down and turned off by the user during charging, it is possible to more appropriately handle the situation.

[0035] In the electric vehicle 20 of the embodiment, when the connection switch 158a is pressed down and turned off by the user during charging, and the connection between the vehicle-side inlet 54 and the vehicle connector 154a is released (disconnected), the retained chargeable power (infrastructure power) Pin is cleared to a value of 0, and the display of the remaining charging time Tchg is cancelled. This makes it possible to prevent the user from feeling uncomfortable due to the remaining charging time Tchg being displayed even after charging has ended.

[0036] In the electric vehicle 20 of the embodiment, external charging is performed by connecting a commercial power source 220 to the vehicle-side inlet 54 of the electric vehicle 20 using the charging cable device 120. However, external charging may also be performed by connecting a connector on the external power source side to the vehicle-side inlet 54 of the electric vehicle 20 without using the charging cable device 120.

[0037] In the electric vehicle 20 of the embodiment, the commercial power source 220 that provides AC power is used as the external power source, but a DC power source that provides DC power may be used as the external power source. In this case, the charger 50 may be provided with a circuit that converts the power from the external power source into power of a desired voltage, instead of the power conversion circuit 52.

[0038] In the electric vehicle 20 of the embodiment, the battery 36 is used as the power storage device, but any device capable of storing power may be used, such as a capacitor. In the electric vehicle 20 of the embodiment, the boost converter 40 is provided, but the boost converter 40 may not be provided.

[0039] In the embodiment, the electric vehicle 20 is provided with a motor 32. However, the electric vehicle 20 may be provided with a hybrid vehicle that includes an engine in addition to the motor 32, or may be provided with a fuel cell.

[0040] The correspondence between the main elements of the embodiment and the main elements of the invention described in the section on Means for Solving the Problems will be described below. In the embodiment, the battery 36 corresponds to the "electricity storage device", the charging relay 52 and the vehicle-side inlet 54 correspond to the "charger", and the electronic control unit 70 corresponds to the "control device".

[0041] The correspondence between the main elements of the Examples and the main elements of the invention described in the Summary of the Problem column does not limit the elements of the invention described in the Summary of the Problem column, since the Examples are examples for specifically explaining the mode for implementing the invention described in the Summary of the Problem column. In other words, the interpretation of the invention described in the Summary of the Problem column should be based on the description in that column, and the Examples are merely a specific example of the invention described in the Summary of the Problem column.

[0042] Although the form for carrying out the present invention has been described above using examples, the present invention is not limited to these examples in any way, and it goes without saying that the present invention can be carried out in various forms without departing from the scope of the gist of the present invention. [Industrial Applicability]

[0043] The present invention can be used in the electric vehicle manufacturing industry and the like. [Explanation of symbols]

[0044] 20 electric vehicle, 22a, 22b drive wheels, 24 differential gear, 26 drive shaft, 32 motor, 32a rotational position detection sensor, 36b current sensor, 34 inverter, 36 battery, 36a, 46a, 48a voltage sensor, 38 system main relay, 40 boost converter, 42 high-voltage side power line, 44 low-voltage side power line, 46 high-voltage side capacitor, 48 low-voltage side capacitor, 50 charger, 51 charging power line, 51a voltage sensor, 51b current sensor, 52 power conversion circuit, 52a commercial power supply side AC / DC conversion circuit, 52b smoothing capacitor, 52c DC / AC conversion circuit, 52d transformer, 52e battery side AC / DC conversion circuit, 54 vehicle side inlet, 56 lid sensor, 57 vehicle side ground line, 58 vehicle side connection line, 60 vehicle side communication line, 62 Lid signal line, 70 electronic control unit, 72 CPU, 74 ROM, 76 RAM, 77 start switch, 78 display, 82 DC / DC converter, 84 auxiliary power line, 86 auxiliary battery, 120 charging cable device, 130 cable electronic control unit (cable ECU), 132 power circuit, 134 control pilot circuit, 151 cable side power line, charging relay 152, 154a vehicle connector, 154b power connector, 157 cable side ground line, 158 cable side connection line, 158a switch, 160 cable side communication line, 162 cable side temperature detection line, 220 commercial power supply, 251 power supply side power line, 254 power supply side connector, 257 power supply side ground line, 256 temperature sensor, 262 power supply side temperature detection line, R precharge resistor, SMRB positive side relay, SMRG negative side relay, SMRP Precharge relay.

Claims

1. an electric vehicle including: a power storage device; a charging device capable of charging the power storage device using electric power from an external power source; a vehicle side connector connectable to a cable side connector of a cable device that connects the external power source to the charging device; a connection detection device that detects whether or not the vehicle side connector and the cable side connector are connected; and a control device that controls the charging device when the power storage device is charged using electric power from the external power source and calculates a remaining charging time required to fully charge the power storage device based on the supply power supplied from the external power source, the cable device has a connection switch that connects and disconnects a power line from an external power source to the charging device and transmits a connection signal to the control device that indicates a connection state in which the power line from the external power source to the charging device is connected and a disconnection state in which the connection is disconnected, when the control device receives a connection signal of the disconnected state by operating the connection switch while the charging device is being charged using power from the external power source with the charging device connected to the external power source via the cable device, and when the connection detection device detects the connection between the vehicle side connector and the cable side connector, the control device holds the supplied power before receiving the connection signal of the disconnected state and calculates the remaining charging time. An electric vehicle characterized by:

2. The electric vehicle according to claim 1, the control device clears the supply of power when the control device receives a connection signal indicating the disconnected state while the power storage device is being charged and when the connection detection device detects that the connection between the vehicle-side connector and the cable-side connector has been disconnected. Electric car.

3. 3. The electric vehicle according to claim 1 or 2, The control device notifies the remaining charging time. Electric car.

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