JP2011205798A - Electric vehicle and charging system thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric vehicle and a charging system thereof, which are capable of charging a power storage device in-situ in comparatively short time without requiring a large charger when the electric vehicle runs out of power on road.SOLUTION: The electric vehicle includes: a first drive force-transmitting mechanism for connecting a motor to traveling drive wheels and transmitting a rotation drive force to be outputted from the motor to the traveling drive wheels; and a second drive force-transmitting mechanism capable of transmitting a rotation drive force to be inputted from a rotating drive source to the motor by connecting the rotation drive force to the motor by connecting the rotating drive source outside the vehicle. When the power storage device runs out of charged power, the rotating drive source outside the vehicle is connected, thereby charging the power storage device.

Description

  The present invention relates to an electric vehicle that drives a traveling motor with a power storage device and a charging system thereof.

  In order to extend the travelable distance of an electric vehicle, it is necessary to install a large number of charging stations capable of rapid charging along the road, and a technique for shortening the charging time has also been proposed (for example, see Patent Document 1). ). However, the charging stand is expensive to install and maintain, and it takes longer to charge than refueling. On the other hand, because the electricity bill is cheap, it may not be possible to secure a sufficient number of installations due to profitability problems in some areas. is there. Therefore, it is possible that the electric vehicle is stuck on the road due to a shortage of charge due to slight inattention of the driver. In response to this, dispatch of rescue vehicles to the site, reloading with charged batteries on the road, moving towed vehicles to the nearest charging station, charging with a charger mounted on the rescue vehicle, etc. Conceivable.

JP-A-6-217415

  However, when transporting a transshipment battery to the job site, it is necessary to immediately prepare a charged battery that is compatible with an out-of-charge vehicle, and the traveling battery is large. However, there is a problem in how to handle the collection / return of the recharged battery and the like.

  When towing to the charging station, there is a time loss until the charging starts to wait for the rescue vehicle (tow truck) and tow to the charging station, which costs a lot, and when the charging station is far away, Time loss and expenses are even greater. If the charging stand is far away, you can charge it by parking in a nearby private house where you can get electricity, but it is very annoying because it requires a long time because it can not be charged quickly with a general power source, Since selling electricity by non-electricity companies is prohibited by the Electricity Business Law, there is a problem of cost settlement.

  If you charge with the charger mounted on the rescue vehicle, there is no need to match the specifications of the battery, and there is no need to collect and return the transshipment battery, and there is no time loss to move to the charging stand, but the same quick charger as the charging stand Then, a large capacity of several tens of Kw is necessary, and the charger itself is large, so it is not suitable for in-vehicle use. In addition, even if the charger can be downsized to a size suitable for in-vehicle use, it becomes very expensive. Therefore, it is not practical from the profit side to arrange a rescue vehicle equipped with such a charger.

  In view of such circumstances, the present invention makes it possible to charge a power storage device in a relatively short time in the field without requiring a large charger when the electric vehicle runs out of charge on the road. An electric vehicle and a charging system thereof are provided.

The invention of claim 1 of the present application is
A motor that functions as a motor for driving and a generator for charging;
When the motor is connected to the motor and driven as a driving prime mover, it functions as an inverter that applies an AC voltage to the motor, and when the motor generates power as a charging generator, an AC current is generated. A power control device that functions as a converter that rectifies
A power storage device connected to the power control device;
A first driving force transmission mechanism for connecting the motor and the traveling drive wheel, and transmitting a rotational driving force output from the motor to the traveling drive wheel;
A second driving force capable of transmitting the rotational driving force input from the rotational driving source to the motor by connecting the rotational driving source and the motor by connecting the rotational driving source outside the vehicle. A transmission mechanism,
When the power storage device is out of charge, the electric power storage device is charged by connecting a rotational drive source outside the vehicle to a second driving force transmission mechanism.

The invention of claim 2 of the present application is
An electric vehicle according to claim 1;
A vehicle having a rotational drive shaft connected to the second driving force transmission mechanism, and generating electric power by the motor by inputting rotational driving force to the motor via the second driving force transmission mechanism An electric vehicle charging system comprising an external rotational drive source.

The invention of claim 3 of the present application is
The electric vehicle charging system according to claim 2, wherein the rotation drive source is mounted on a rescue vehicle.

  According to the first to third aspects of the present invention, the following excellent effects can be obtained. By connecting a rotation drive source outside the vehicle to the motor of the electric vehicle, the power storage device can be charged, so even if the battery runs out of charge on the road, a charged power storage device of the same specification or an expensive quick charger It is possible to return to a state where the vehicle can run on its own without having to arrange the vehicle or tow the uncharged vehicle to the charging stand. In addition, the rotational drive source outside the vehicle only needs to ensure the rotational output performance that can be generated by the motor of the electric vehicle, and if an internal combustion engine such as a gasoline engine is adopted, it is not necessary to charge in advance. It can respond quickly. Furthermore, if the driving motor of the rescue vehicle is provided with a rotation output shaft that can be connected to an electric vehicle, the cost and labor required for system introduction and maintenance can be reduced.

The block diagram explaining the charging system of the electric vehicle which concerns on embodiment of this invention.

(Electric vehicle charging system 1)
An electric vehicle charging system 1 shown in FIG. 1 includes an electric vehicle 2 and another rescue vehicle 3 that can charge the electric vehicle 2. For example, when the electric vehicle 2 runs out of charge on the road and becomes unable to travel, the charging system 1 sends a rescue vehicle 3 to the site and installs a traveling motor mounted on the electric vehicle 2. By rotating and driving from the outside, electric power is generated inside the vehicle of the electric vehicle 2 to return it to a chargeable state. A thick line in the electric vehicle 2 in FIG. 1 indicates a power transmission path.

  For this reason, the electric vehicle 2 uses the rotational driving force provided from the rescue vehicle 3 to the same motor separately from the driving force transmission mechanism for transmitting the rotational driving force output from the traveling motor to the traveling drive wheels. A driving force transmission mechanism for transmission is provided, and a power control device having a function of storing electric power generated by the motor in the power storage device. The rescue vehicle 3 includes a rotational drive source for outputting the rotational driving force provided to the electric vehicle 2.

(Electric car 2)
As shown in FIG. 1, the electric vehicle 2 includes a motor 21, a power control device 22, a traveling battery 23, a first driving force transmission mechanism 24, a second driving force transmission mechanism 25, and a switching mechanism 26. ing. In addition, the thick line in the electric vehicle 2 in FIG. 1 shows a power transmission path.

  The motor 21 outputs a rotational driving force from a rotational driving shaft as a traveling prime mover when an AC voltage is applied to its electrical terminal. Moreover, the motor 21 outputs alternating current power from an electrical terminal as a charging generator by inputting the rotational driving force provided from the rescue vehicle 3 to the rotational driving shaft. The motor 21 also generates electric power when a brake operation is performed in the electric vehicle 2, outputs AC power from the electric terminal, and functions as a regenerative brake that uses rotational resistance due to power generation as a braking force.

  The power control device 22 electrically connects the motor 21 and the traveling battery 23, and converts the DC voltage supplied from the traveling battery 23 into an AC voltage as an inverter when the motor 21 is rotationally driven as a driving motor. Then, the AC voltage is applied to the electric terminal of the motor 21. In addition, when the motor 21 generates power as a charging generator using the rotational driving force provided from the rescue vehicle 3, the power control device 22 converts the AC power output from the electric terminal by the motor 21 into DC power as a converter. The traveling battery 23 is charged with the DC power. The AC power generated by the regenerative brake is also converted into DC power by the power control device 22 and charged.

  The AC voltage supplied from the power control device 22 to the motor 21 is converted into a three-phase AC in accordance with a torque command based on the driver's accelerator operation amount. In addition, the power control device 22 has a quick charging port 22a for connecting a high voltage cable of a quick charger installed in a charging stand as a charging means used in normal times, and a 100V or 200V alternating current of a general household or the like. An in-vehicle charger 221 for charging from a power source and a cable plug 221a for connecting this to a power outlet are provided.

  The traveling battery 23 is a power storage device that stores electricity to drive the electric vehicle 2 by rotating the motor 21 by supplying high voltage power via the power control device 22, for example, nickel hydrogen Secondary batteries such as batteries and lithium ion batteries are employed. In addition to the secondary battery, a large-capacity capacitor can also be employed as the power storage device serving as the driving power source.

  The first drive force transmission mechanism 24 mechanically connects the rotation drive shaft of the motor 21 and the travel drive wheel (tire) 27 to thereby generate the rotation drive force output from the rotation drive shaft of the motor 21 as the travel drive wheel. 27, specifically, a combination of a transmission such as a CVT (continuously variable transmission), a propeller shaft, a speed reducer, a drive shaft, and the like.

  The second driving force transmission mechanism 25 is a transmission device that transmits the rotational driving force output from the rotational driving source of the rescue vehicle 3 to the rotational driving shaft of the motor 21, and is connected to the rotational output shaft of the rotational driving source. Part 251. The connecting portion 251 is a cylindrical body having a shaft hole, and a large number of grooves extending in the axial direction are provided in the shaft hole at equal intervals over the entire circumference of the shaft hole. The connecting portion 251 is provided so as to be exposed on the outer surface of the vehicle so that it can be easily accessed from the outside of the vehicle, and is covered with a cover (not shown) that can be attached / detached or opened / closed for safety.

  The switching mechanism 26 is a transmission device for connecting the rotation output shaft of the motor 21 to the first driving force transmission mechanism 24 or the second driving force transmission mechanism 25 so that power can be transmitted. The driving force is transmitted to the traveling drive wheel 27 via the first driving force transmission mechanism 24, or the rotational driving force of the rotational driving source 31 is transmitted to the motor 21 via the second driving force transmission mechanism 25. It can be done selectively. Normally, the motor 21 is connected to the first driving force transmission mechanism 24, the rotational driving force of the motor 21 is transmitted to the traveling drive wheels 27, and the rotational energy of the traveling drive wheels 27 is the motor 21 during vehicle deceleration. It is transmitted to.

  Switching of the connection destination by the switching mechanism 26 is performed by an actuator provided inside the switching mechanism 26, but it is detected that a rotation output shaft 311 described later is connected to the connection portion 251 of the second driving force transmission mechanism 25. A sensor switch (not shown) is provided, and the actuator is operated by a detection signal from the sensor switch to connect the motor 21 and the first driving force transmission mechanism 24 to the motor 21 and the second driving force. Switch to the connection of the transmission mechanism 25. The switching mechanism 26 is provided with an operation unit (not shown) that allows an operator to manually perform a switching operation in case the battery is completely charged.

  In FIG. 1, the first driving force transmission mechanism 24, the second driving force transmission mechanism 25, and the switching mechanism 26 are shown in separate frames, but these mechanisms are formed in a state of being separated from each other. For example, it may be housed integrally in one gear case.

(Relief vehicle 3)
The rescue vehicle 3 is a vehicle on which a rotation drive source 31 for providing a rotation drive force to the motor 21 of the electric vehicle 2 is mounted. The rotational drive source 31 is an internal combustion engine such as a gasoline engine, and has sufficient output performance to charge the electricity necessary for traveling by rotationally driving the motor 21. A rotation output shaft 311 protruding from the rescue vehicle 3 to the outside is detachably attached to the rotation drive source 31, and the tip of the rotation output shaft 311 has a spline shaft shape that can be inserted and fitted into the connection portion 251 described above. Thus, the rotational output of the rotational drive source 31 can be reliably transmitted to the motor 21 via the second driving force transmission mechanism 25.

(Operation of electric vehicle system 1)
Here, the operation of the electric vehicle system 1 will be described. In the electric vehicle 2, the switching mechanism 26 normally connects the motor 21 and the first driving force transmission mechanism 24 in the electric vehicle 2, and the motor 21 functions as a traveling motor, so that the rotational driving force is the first driving force. This is provided to the traveling drive wheel 27 via the power transmission mechanism 24 to cause the electric vehicle 2 to travel. When a brake operation is performed during traveling, the motor 21 functions as a charging generator, thereby recovering rotational energy as electric power.

  When the electric vehicle 2 becomes unable to travel due to a decrease in the supply voltage due to the running battery 23 being out of charge, the rescue vehicle 3 is dispatched to the site, and the rescue vehicle 3 is laid on the electric vehicle 2. Is connected to the connection portion 251 of the second driving force transmission mechanism 25 of the electric vehicle 2 via the rotation output shaft 311. A sensor switch provided in the connecting portion 251 detects the connection of the rotation output shaft 311, and an actuator provided in the switching mechanism 26 operates to connect the motor 21 to the first driving force transmission mechanism 24. On the other hand, it is connected to the first driving force transmission mechanism 25 so that the rotational driving force of the rotational driving source 31 can be input to the motor 21.

  Then, by rotating the rotation drive source 31, the rotation output rotates the motor 21 to generate electric power. Thereby, the rotational driving force supplied from the rescue vehicle 3 is collected as electric power in the electric vehicle 2. As a result, the electric vehicle 2 that has run out of charge can be returned to a state where it can run in a relatively short time without being moved to a charging stand by a tow truck or being transferred to a charged battery.

(Modification of the above embodiment)
In the above embodiment, the electric vehicle 2 is configured such that the switching mechanism 26 selectively mechanically connects the first driving force transmission mechanism 24 or the second driving force transmission mechanism 25 to the motor 21. 21 is directly connected to the first driving force transmission mechanism and a switching mechanism is provided in the middle of the power transmission system in the first driving force transmission mechanism, and the motor 21 and the traveling drive wheel 27 are connected by the operation of the switching mechanism. On the other hand, connection to the second driving force transmission mechanism 25 may be performed. For example, when the first driving force transmission mechanism 24 includes a transmission, a propeller shaft, a reduction gear, and a drive shaft that are coupled in series, the switching mechanism 26 is incorporated in the transmission, Connection to the driving force transmission mechanism 25 may be performed.

  In the said embodiment, the rotational drive source 31 mounted in the rescue vehicle 3 is good also as sharing the driving | running | working motor | power_engine of the rescue vehicle 3. FIG. For example, a transmission connected to the prime mover may be modified to provide a rotary drive shaft that can output a driving force to the outside of the vehicle.

  In addition, this invention is not limited to embodiment mentioned above, Of course, in the range which does not deviate from the summary of this invention, a various change can be added.

Claims (3)

A motor that functions as a motor for driving and a generator for charging;
When the motor is connected to the motor and driven as a driving prime mover, it functions as an inverter that applies an AC voltage to the motor, and when the motor generates power as a charging generator, an AC current is generated. A power control device that functions as a converter that rectifies
A power storage device connected to the power control device;
A first driving force transmission mechanism for connecting the motor and the traveling drive wheel, and transmitting a rotational driving force output from the motor to the traveling drive wheel;
A second driving force capable of transmitting the rotational driving force input from the rotational driving source to the motor by connecting the rotational driving source and the motor by connecting the rotational driving source outside the vehicle. A transmission mechanism,
An electric vehicle characterized in that when the power storage device is out of charge, the power storage device is charged by connecting a rotational drive source outside the vehicle to a second driving force transmission mechanism. An electric vehicle according to claim 1;
A vehicle having a rotational drive shaft connected to the second driving force transmission mechanism, and generating electric power by the motor by inputting rotational driving force to the motor via the second driving force transmission mechanism An electric vehicle charging system comprising: an external rotational drive source.   The electric vehicle charging system according to claim 2, wherein the rotational drive source is mounted on a rescue vehicle.

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