JP2000004542A - Electric vehicle charging system - Google Patents

Abstract

(57) Abstract: An object of the present invention is to provide an electric vehicle charging system capable of simplifying the configuration of an entire system for charging electric power mounted on an electric vehicle. SOLUTION: A stationary power supply 27 has a commercial power supply AC.
While 200 V is rectified to output rectified power, the portable charging device 10 rectifies 100 V commercial power and outputs rectified power. Here, when the stationary power supply device 27 and the portable charging device 10 are combined, the electronic switch 1
In step 4, either one of the rectified powers is selected, and the selected rectified power is converted into electromagnetic energy by the high frequency inverter 5 and supplied to the electric vehicle. Here, the fitting detection unit 9 determines the fitting state when the stationary power supply device 27 and the portable charging device 10 are combined.
The controller 7 determines the operation mode based on the presence or absence of the combined signal, and controls the controller 7 to select the rectified power according to the operation mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging system for an electric vehicle in which a portable charging device can be combined with a power supply device provided at a permanent location.

[0002]

2. Description of the Related Art Batteries mounted on electric vehicles and the like are:
It is necessary to charge the battery periodically with a charging device, but at present there are only a few facilities that have charging devices for electric vehicles, and the places where electric vehicles can be charged are limited. . For this reason, for example, a portable charger 130 as shown in FIG. It is conceivable that the battery is charged by the battery charger 130.

[0003]

However, the portable charger 130 using a general 100 V commercial power supply has a limitation in that the power supply capacity is small and a limitation in size and weight in consideration of portability. Due to these limitations, there is a problem that it takes time to charge a large-capacity battery for an electric vehicle using the portable charger 130.

[0004] Therefore, in order to shorten the charging time, it is necessary to prepare a stationary charger 135 that uses a large-capacity power supply and has a large output power. It is simply conceivable that each electric vehicle owner would own both a portable and a stationary type, but having both of them would typically use a stationary type charger 135 with a short charging time to use the portable charger 130. Is often rarely used in an emergency.

[0005] The present invention has been made in view of the above,
An object of the present invention is to provide an electric vehicle charging system that can simplify the configuration of the entire system for charging electric power mounted on an electric vehicle.

[0006]

According to the first aspect of the present invention,
In order to solve the above-described problem, in a charging system for an electric vehicle that rectifies commercial power and supplies the rectified electric power to an electric vehicle, and charges a battery mounted on the electric vehicle, a power supply device provided at a permanent location includes: Rectify the 1st commercial power supply and
A first charging means for outputting a rectified electric power of the second commercial power supply.
A second rectifying means for outputting rectified power, a switch means for selecting one of the first rectified power and the second rectified power when the power supply device and the present device are combined, Supply means for supplying rectified power from the switch means to the electric vehicle, engagement detection means for detecting engagement when the power supply device and the present apparatus are combined, and an operation mode based on a detection result from the engagement detection means. The gist of the present invention is that the control means controls the switching means so as to determine the rectified power according to the operation mode.

According to a second aspect of the present invention, in order to solve the above-mentioned problem, the portable charging device is configured to determine whether a rectified power output from the switch means is in a normal state within a predetermined range according to an operation mode. And the control means controls the supply means to permit the operation of the supply means when the rectified power is in a normal state by the rectification state detection means.

[0008]

According to the first aspect of the present invention, the power supply device is configured to rectify the first commercial power and output the first rectified power, while the portable charging device is The second commercial power supply is rectified to output the second rectified power, and when the power supply device and the present device are combined, one of the first rectified power and the second rectified power is output. Select and supply the selected rectified power to the electric vehicle. Here, it is configured to detect a fitting when the power supply device and the present device are combined, determine an operation mode based on the fitting detection result, and control so as to select a rectified power according to the working mode. Thus, when the power supply device and the portable charging device are combined, the first rectified power rectified on the power supply device side can be supplied to the electric vehicle side, and the battery mounted on the electric vehicle side can be charged. When the portable charging device is used alone, the second rectified power rectified on the mobile charging device side can be supplied to the electric vehicle side to charge the battery mounted on the electric vehicle side. As a result, the configuration from when one of the first or second rectified power is selected to when it is supplied to the electric vehicle can be commonly used in the entire system. Therefore, the configuration of the entire system can be simplified.

According to the present invention, whether or not the selected rectified power is in a normal state within a predetermined range according to the operation mode is detected, and if the rectified power is in a normal state, Controls the operation mode when the power supply device and the mobile charging device are combined and the normal operation mode according to the operation mode when the mobile charging device is used alone by controlling to allow the supply to the electric vehicle. Operation can be guaranteed.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a state in which a portable charging device 10 constituting a charging system for an electric vehicle according to an embodiment of the present invention is coupled to a stationary power supply unit.

The portable charging device 10 is provided with a plug 32 for 100 V commercial power supply connected to the filter unit 1, a high-frequency inverter 5, and an output paddle 33 connected to the communication unit 6.

The charging device in the box 31 of the portable charging device 10 includes a filter unit 1 and a full-wave rectifying unit 2 in the order in which electricity flows.
, A capacitor charging circuit 8, a diode D1, an electronic switch 14, a smoothing capacitor 4, a high frequency inverter 5, a control unit 7, a communication unit 6, and a fitting detection unit 9.
And concave connection terminals 13, 16, 18. The filter unit 1, the full-wave rectifying unit 2, the capacitor charging circuit 8, and the diode D1 constitute a first rectifying circuit 28 that rectifies AC from a commercial power supply and outputs rectified power, while the smoothing capacitor 4 And high frequency inverter 5
Constitute electromagnetic energy circuits 29 for converting rectified power into electromagnetic energy.

The filter unit 1 prevents noise generated when the switching element operates in the apparatus from returning to the wiring side of the commercial power supply AC 100 V via the plug 32, and at the same time, the AC wiring side in the opposite direction. From entering the device.

The full-wave rectifying unit 2 performs full-wave rectification on a commercial power supply to generate a pulsating flow having a full-wave rectified waveform. Capacitor charging circuit 8
The pulsating current after full-wave rectification by the full-wave rectifier 2 is charged into a capacitor to generate rectified power, and the rectified power is output to one terminal of the electronic switch 14 via the diode D1.

The movable contact of the electronic switch 14 is connected to the smoothing capacitor 4, and one fixed contact is connected to a diode D1.
The other fixed contact is connected to the concave connection terminal 16. This movable contact is normally connected to one fixed contact, but is switched to the other fixed contact by various signals from the control unit 7.

The smoothing capacitor 4 includes an electronic switch 14
To form a stable DC voltage by charging a pulsating component of the rectified power supplied through the DC / DC converter. The high-frequency inverter 5 responds to the operation permission signal from the control unit 7 to reduce the DC voltage from the smoothing capacitor 4 to, for example, 150
It is converted into a variable high-frequency current of KHz to 300 KHz, and high-frequency electromagnetic field energy is generated by the paddle 33.

The communication section 6 is a unit for performing high-frequency communication between an electric vehicle (not shown) and the portable charging device 10 via a paddle 33 and a charge port provided in the electric vehicle.

The control section 7 has a CPU, a ROM, and a RAM, and controls the entire apparatus according to a control program stored in the ROM. In particular, the control unit 7 adjusts the boosting level of the pulsating flow of the active filter 3 or adjusts the output frequency of the high-frequency inverter 5 according to a command received from the electric vehicle via the communication unit 6, and The electromagnetic energy output from the controller 33 is controlled.

The fitting detection unit 9 and the concave connection terminals 13, 16, and 18 serving as input terminals are mounted on the bottom surface of the box 31, and are configured to be connected to the outside.

The fitting detection unit 9 is composed of a microswitch or the like. When the box 37 of the external stationary power supply 27 and the box 31 of the portable charging device 10 are fitted to each other, a coupling signal is sent to the control unit 7. send.

The concave connection terminal 13 is connected to the control unit 7, and various signals are communicated with the inside of the box 37 of the stationary power supply device 27. The concave connection terminal 16 couples the ground wire of the stationary power supply device 27 (base frame 36) with the ground wire of the smoothing capacitor 4, the high-frequency inverter 5, the capacitor charging circuit 8 and the like of the portable charging device 10. The concave connection terminal 18 inputs the rectified power from the active filter 3 via the diode D2 and the convex connection terminal 17.

On the other hand, as shown in FIG. 1, the stationary power supply device 27 in the box 37 on the base frame 36 includes a relatively large-capacity filter unit 11, a full-wave rectification unit 12, It is composed of an active filter 3 and convex connection terminals 15, 17 and 19 serving as output terminals. The box 37 has a commercial power supply A connected to the filter unit 11.
A plug 34 for C200V is provided.

The convex connection terminal 17 outputs the rectified power from the active filter 3 to the concave connection terminal 18 via the diode D2. The convex connection terminal 15 is a ground wire and can be connected to the concave connection terminal 16. The convex connection terminal 19 receives a control signal from the control unit 7 of the portable charging device 10 via the concave connection terminal 13 and sends the control signal to the active filter 3.

The filter section 11 detects noise generated when the switching element operates in the portable charging apparatus.
4 is prevented from returning to the wiring side of the commercial power supply 200 V AC, and at the same time, noise from the AC wiring side in the opposite direction is prevented from entering the apparatus. Full-wave rectifier 1
2, a full-wave rectification of the commercial power supply to create a pulsating flow having a full-wave rectified waveform. The active fitter 3 has an electronic chopper,
In order to improve the power factor of the commercial power supply, the current and voltage waveforms are synchronized, and the pulsating level of the full-wave rectified waveform is boosted to form a specified voltage DC.

Next, the operation of the control unit 7 provided in the portable charging device 10 shown in FIG. 1 will be described with reference to the flowchart shown in FIG.

After the driver parks the vehicle at a predetermined position in the garage, the driver gets out of the vehicle, takes out the portable charging device 10 placed in the trunk of the vehicle, and, as shown in FIG. And connect. Next, the plug 34 of the stationary power supply 27 is connected to the commercial power supply A provided in the garage.
Plug into the outlet of C200V and connect paddle 33 to charge port 39 of electric vehicle 38 to prepare for charging. Then, the driver turns on a power breaker (not shown) provided in the box 37.

Therefore, in step S10, it is determined whether or not a power breaker (not shown) in the box 37 is turned on, and the process proceeds to step S10 until the power breaker is turned on.
Repeat step 10 to enter the wait state.

If the power breaker has been turned on, the process proceeds to step S20, where the control unit 7 determines whether or not a coupling signal has been received from the coupling detection unit 9 indicating that coupling between the devices has been detected. If the combined signal has arrived, the process proceeds to step S30, and the control unit 7 sends an operation permission signal to the active filter 3 in the box 37 via the concave connection terminal 13 and the convex connection terminal 19. At the same time, the control unit 7 sends a switching signal to the electronic switch 14, switches the movable contact to the concave connection terminal 18 side, and sets the commercial power supply AC 200V system to the level 2 high power mode.

Next, in step S40, the control unit 7 changes the operating state of the active filter 3 via the concave connection terminal 13 and the convex connection terminal 19 in order to determine whether the active filter 3 is operating normally. Monitor and examine. If the active filter 3 is operating normally, the process proceeds to step S60, where the input voltage of the smoothing capacitor 4 is checked, and if the input voltage is within a predetermined range, the process proceeds to step S70.

Next, in step S70, the control unit 7
An operation permission signal is sent to the high frequency inverter 5 to generate high frequency electromagnetic field energy. The electromagnetic energy in the high power mode is supplied from the paddle 33 to the charge port 3.
9 to the battery of the electric vehicle 38.

On the other hand, if the combined signal from the fitting detection unit 9 has not arrived at step S20, the portable charging device 1
Since 0 is not fitted to the box 37 of the stationary power supply device 27 and only the portable charging device 10 is used alone, the process proceeds to step S50.

In step S50, the control unit 7
Sends an operation permission signal to the capacitor charging circuit 8 of the portable charging device 10. At this time, the electronic switch 14 is in the normal state, the movable contact is still connected to the fixed contact on the diode D1 side, and the low power mode of the level 1 of the commercial power supply 100V AC is maintained.

Next, the operation proceeds to step S60, in which the input voltage of the smoothing capacitor 4 is confirmed. If the input voltage is within a predetermined range, the operation proceeds to step S70.

Then, in step S70, the control unit 7
Sends an operation permission signal to the high frequency inverter 5 to generate high frequency electromagnetic field energy. The electromagnetic energy in the low power mode is supplied from the paddle 33 to the charge port 3.
9 to the battery of the electric vehicle 38. As described above, the normal operation according to the high power mode when the stationary power supply device 27 and the portable charging device 10 are combined and the normal operation according to the low power mode when the portable charging device 10 is used alone are assured. Can be.

On the other hand, if it is detected in step S40 that the active filter 3 of the stationary power supply 27 is not operating normally, the flow advances to step S50 to switch the level 2 high power mode of the commercial AC 200V system. Abort. Then, the control unit 7 sends an operation permission signal to the capacitor charging circuit 8 of the portable charging device 10. At this time, the electronic switch 14 remains in the normal state, and the diode D1
Contacts remain connected to the commercial power supply AC1
The low-power mode of the level 1 of the 00V system is maintained.
That is, the portable charging device 10 is the case 3 of the stationary power supply device 27.
Even in the case of the connection with 7, since the stationary power supply 27 is in an abnormal state, the high power mode is stopped, and the charging in the low power mode is executed.

If the input voltage of the smoothing capacitor 4 is out of the predetermined range in step S60, the charging is stopped as a power failure (fail), and an alarm provided in the portable charging device 10 is provided. A lamp (not shown) is turned on to notify that the power supply is defective.

For this reason, the portable charging device 10 is configured such that when it is carried, it can be supplied with an easily available commercial power source of AC 100 V and has an output capacity of, for example, about 1 kW. When the power supply unit is connected to the power supply unit 27, a specially-provided power supply of a commercial power supply of 200 V AC can be input, and the output capacity can be configured to be high power of, for example, about 6 KW. In addition, the mobile charging device 1
0 indicates that the output capacity is low power when the mobile phone is carried, but can be used alone. On the other hand, at the time of connection with the stationary power supply unit 27, the output capacity becomes high and the charging capacity can be increased. The number of components constituting the electric vehicle charging system is reduced as a whole, which can contribute to a reduction in the cost of components of the stationary charging device.

When the portable charging device 10 is combined with the stationary power supply device 27, the control unit 7 provided in the portable charging device 10 controls the filter unit 11 in the stationary power supply device 27.
And the full-wave rectification unit 12 to automatically switch the power supply to the electric vehicle to a large capacity.

Further, both plugs 32 and 34 are simultaneously connected to a commercial power supply AC100V of an AC outlet and a commercial power supply AC2.
When connected to 00 V, the control unit 7 outputs a command signal to the electronic switch 14 so as to operate in the high power mode with priority given to the commercial power of 200 V AC.

Further, in the present embodiment, the case where the portable charging device 10 and the stationary power supply device 27 are used for an electric vehicle has been described. However, the present invention is not limited to such a case, and the present invention is not limited to such a case. The present invention can be similarly applied to the case of using in a go-kart of a stadium and a stadium and other electric vehicles.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state in which a portable charging device 10 constituting a charging system for an electric vehicle according to an embodiment of the present invention is coupled to a stationary power supply unit.

FIG. 2 is a flowchart for explaining a charging operation of a control unit 7 provided in the portable charging device 10.

FIG. 3 is an external perspective view showing the entire electric vehicle charging system of the present invention.

FIG. 4 is a diagram showing a configuration of a conventional electric vehicle charging system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 11 Filter part 2, 12 Full wave rectification part 3 Active filter 4 Smoothing capacitor 5 High frequency inverter 6 Communication part 7 Control part 8 Capacitor charging circuit 9 Fitting detection part 10 Mobile charging device 13, 16, 18 Concave connection terminal 14 Electronic switch 15, 17, 19 Convex connection terminal 27 Stationary power supply 32, 34 Plug 33 Paddle 38 Electric vehicle 39 Charge port

Claims (2)

[Claims] 1. An electric vehicle charging system for rectifying commercial power and supplying the rectified power to an electric vehicle and charging a battery mounted on the electric vehicle, wherein a power supply device provided at a permanent location includes: A first charging unit that rectifies a commercial power supply and outputs a first rectified power; a mobile charging device used at a destination; a second charging unit that rectifies the second commercial power and outputs a second rectified power Rectifying means, a switch means for selecting one of the first rectified power and the second rectified power when the power supply device and the present apparatus are combined, and rectifying power from the switch means Supply means for supplying to the vehicle; fitting detection means for detecting fitting when the power supply device and the present apparatus are combined; determining an operation mode based on a detection result from the fitting detection means; Rectified power Charging system for an electric vehicle, characterized in that a control means for controlling the switching means so as to. 2. The portable charging device further comprises: a rectification state detection unit that detects whether a rectified power output from the switch unit is in a normal state within a predetermined range according to an operation mode, and the control unit. The charging system for an electric vehicle according to claim 1, wherein when the rectified power is in a normal state by the rectification state detection means, the control is performed so as to permit the operation of the supply means.