KR20070091231A - Motor vehicle - Google Patents

Abstract

The invention relates to a motor vehicle comprising at least one electric motor, an energy accumulator for supplying drive energy to the electric motor, a plug-in connector which is connected to the energy accumulator and is used to connect to a current source, and a control system for controlling the current flow from the current source to the energy accumulator. The aim of the invention is to provide a motor vehicle that can contribute to reducing the load during consumption peaks in the network. To this end, the invention relates to a motor vehicle comprising at least one electric motor, an energy accumulator for providing drive energy for the electric motor, a plug-in connector which is connected to the energy accumulator and is used to connect to a current source and to a control system for controlling the current flow from the current source to the energy accumulator. The inventive motor vehicle is characterised in that the control system enables a current flow from the energy accumulator to the current source (network), and a current inverter is provided in or outside the vehicle, by which means the electrical power of the energy accumulator can be fed as an alternating current into the current source (network).

Description

Motor vehicle {MOTOR VEHICLE}

The invention relates to at least one electric motor, an energy storage device for providing driving energy for the electric motor, a plug connector for connecting to the energy storage device and for connecting to a current source. connector, and control means for controlling the current from the current source to the energy storage device.

Such vehicles have already been known in the art for a long time and are known to be very good for medium or short distance transport. In order for such a vehicle to be available throughout, the available energy storage device must be charged. When a vehicle travels a certain distance, the energy storage device needs to be refilled to compensate for energy consumption. In this case, a cautious driver must charge the energy storage device after each use so that it can always be arbitrarily used to the maximum possible driving range.

As a prior art for such a motor vehicle, the German patent DE 692 20 228, DE 197 22 644 and P 43 37 978 are generally disclosed in this respect.

Movement by these vehicles, or other vehicles, is not always accurately determined before they leave, so the time of energy costs is highest, or the time called for example midday peak, i.e. the supply network is very severe. There may be times when the vehicle's energy storage device needs to be charged when it is congested.

Therefore, this is a disadvantage because it purchases energy at a high price and always puts a load on the congested supply network.

It is therefore an object of the present invention to provide a motor vehicle that can mitigate the load at the peak of consumption of such a supply network.

The object of the present invention is achieved by a motor vehicle of the kind described in the west of this specification in that the control means flows a current from the energy storage device to the current source. In this way a flow of current from the energy storage of the motor vehicle to the supply network can occur, which in turn can accommodate the peak demand.

In a preferred embodiment of the invention, the flow of current from the energy storage device to the current source, for example the current network, is such that the predetermined residual electrical energy in the energy storage device is controlled by a control means that stops the flow of current when a predetermined residual charge amount is reached. It is controlled to keep the amount. For this purpose, an apparatus for detecting the amount of charge in an energy storage device is provided.

As a preferred embodiment of the present invention, the control means can communicate with the network via a communication device and as a result control the energy supply from the network in an optimal manner, depending on the position of the motor vehicle and the amount of charge available.

In particular, the control means of the preferred form according to the invention are designed to include or be connected to a clock. Such control means may be operated so that charge and discharge operations occur within a predetermined time period. In this way, it is advantageously possible to charge the energy storage device at night on the one hand with a low load on the supply network and on the other hand with a low charging cost, while discharging preferably needs to relieve the load on the supply network. And sometimes occurs when the cost of energy is higher than the cost during the charging process.

In this way, in addition to reducing the load on the supply network, an economic advantage can be obtained from the vehicle operator's point of view.

In general, working workers must travel a certain distance to the vehicle and do not use the vehicle at all while working, thus statistically accounting for the basic supply of electrical energy available for most of the time (working time). If such energy is available on a regular basis, it can help with regular energy supply of storage devices and wind power installations, which is currently under discussion and is required in the network. It would be particularly attractive if the vehicle's storage device was charged by a renewable energy source. More specifically, this renewable energy source itself will then produce and supply at least a portion of the regular energy supply required.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The accompanying drawings show a schematic block circuit diagram of a device according to the invention. The member number 1 represents a frame including components related to the motor vehicle. Thus, the motor vehicle includes the control means 10. The control means 10 are connected to an energy storage device 20, a drive motor 40 and a releasable connector 50, for example in the form of a plug connector. In addition, a connection can be provided between the connector 50 and the current source 30, here shown in the form of a current supply network.

In order to supply a sufficient amount of energy necessary for the operation of the motor vehicle 1, the control means 10 can monitor the state of charge of the storage device, for example a battery or a capacitor storage device. If the control means 10 detects that the storage device 20 requires charging, the control means causes current to flow from the network 30 to the storage device 20 via the connector 50 and the storage device is turned on. Is charged. In this case, it will be appreciated that in order to reliably protect the storage device from overcharging, the control means 10 may take into account the corresponding charging characteristics of the storage device.

The control means may allow charging within a first period of time that may be pre-determinable. By doing so, the charging device 20 can, on the one hand, be able to keep the cost of the current inexpensive so that the costs associated with charging the storage device can be kept relatively low while at the same time the supply network 30 on the other hand. Can be charged at night when the load is not high. In addition, the control means can be designed such that current flows from the storage device 20 to the network 30 via the plug connector 50 and the inverter 60. In this regard, the amount of charge that can be delivered to the network can be limited by the amount of remaining charge that can be selected in the storage device 20.

In this way, for example, after the storage device 20 has arrived at the workplace, the energy remaining in the storage device while the storage device 20 is fully charged may be the network 30 in case of high energy demand, such as during a noon peak. Can be resupplied). However, if a predetermined residual charge is reached during the supply, in any case there is a sufficient amount of energy in the storage device for the control means to stop the flow of current from the storage device 20 to the network 30 to return from the workplace at night. To be secured.

It can be appreciated that the current supplied to the network at peak times can be fully monetized to provide economic gains in addition to reducing the load on the network.

According to the present invention there is provided a vehicle with an electrical energy storage device, which enables the vehicle to be used as an energy source for a power supply network capable of drawing energy.

As noted, daytime power demand is significantly higher than nighttime power demand. Thus, for example, the demand for electricity in a public power supply network rises from the low of 1 AM to 4 AM (the dawn peak), reaching the highest level around midday (noon peak) and then until the midnight low level. It decreases by that time. Thus, the energy demand at night is significantly lower than the usual available energy supply, and consumers are also using midnight power, which is significantly lower in price than daytime power costs.

The power supply network should be designed to meet the power demand during the daytime peak, when the power demand is highest, as well as nighttime power demand. This means that in terms of power supply facilities, a large number of electrical energy generators must be provided to meet these demands even at the midday peak, where very high power demands are required.

In view of this, the present invention usually requires that electric energy can be supplied in the electricity supply network, so that the electric vehicle properly connected with the connection of the power supply network can be charged with the electric energy in the power supply network. City proposes an electric vehicle that may supply the supply network with energy that is not needed within a predetermined time.

First, assuming that the vehicle should be used by people between 7 am and 8:30 am, and approximately 4:30 pm and 6:30 pm, on weekdays, these motor vehicles are mostly unused during the day and parked You will be parked at. Charging the energy storage of an electric vehicle at night in the vehicle owner's home is not a problem and is already doing so. However, a novel point according to the invention is that after the motor vehicle arrives at the workplace, it is connected to the current network in order to supply the network with the necessary energy during the peak power consumption time.

If the motor vehicle is equipped with a battery that is rapidly charged and discharged, even 500 to 1000 units having this characteristic can supply a very high level of feed-in power to the network.

A particular advantage of the present invention for a power supply facility is that the power supply facility can use electrical energy storage without paying for itself and without paying for maintenance relationships that do not have to be accountable. From the point of view of the vehicle user, the advantage of the present invention is that, for example, at noon when the user is at work and does not use a motor vehicle at all, the storage device of the vehicle filled with sufficient energy is virtually leased to the power supply facility to use the energy stored therein. It can be sold. Thus, consumers can supply electrical energy from their vehicle to the power supply network at noon time, which can result in significant profits, and at night they are forced to charge such vehicles at low cost (night current).

According to the present invention, the vehicle's electrical energy storage device does not fall below a predetermined minimum level, and if necessary after the noon peak point, more specifically, when the network demand decreases again in the afternoon, the electrical energy storage device is recharged. It should be understood that an electrical storage device for a motor vehicle can be provided that can be provided.

However, it may be possible to provide the ability to personally control the vehicle so that it has enough energy to return home in the evening (the minimum amount of energy to be sure to arrive home) and recharge the reservoir the next night with the corresponding late night current. Can be.

Thus, by appropriate programming techniques (even by remote input (if the user uses his mobile phone), if possible) the user of the vehicle may predetermine the period or time at which the storage device can be discharged.

The present invention is particularly suitable for large cities with large parking lots and large duplex parking lots. It is believed that the present invention is particularly well suited for multi-storey car parks in airports transporting holiday traffic, on average for parking thousands of private vehicles that are not used at all for 7 to 14 days on average. During this period, at the peak time at the corresponding connection of the vehicle-if such a vehicle is an electric vehicle according to the invention-the energy stored in each of the storage devices of the vehicle is discharged and the storage device of the vehicle back into electrical energy in a period of lower demand. It can be built into a suitable power management system that can be used in the power supply network to charge the.

Hereinafter, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings.

As mentioned above, Fig. 1 schematically shows the connection of a vehicle according to the invention to a power supply network. 2 shows a general daily chart of power demand for a power supply facility. Figure 3 shows the state of charge state by the state of charge of the vehicle according to the invention.

The electrical storage device of the vehicle 1 is equipped with suitable electronic control means (power management system) capable of triggering and controlling the electric charge as well as the discharge of the storage device.

In addition, the power management system can be programmed to be predetermined by the user so that discharge is possible only at a specific time. For example, discharging, or supplying power to the electrical energy supply network, occurs only during 10 am to 3 pm and at other times causes the battery to be charged when the vehicle is connected to the supply network.

When discharge occurs at 7 am to 4 pm, power management does not occur immediately, but only at night between 12 midnight and 4 am, i.e. only when a very sufficient late night current is obtained from the electricity supply network. The system may be programmed.

In addition, in any case so that the user can move as far as he or she wants in his vehicle, for example, to ensure that the distance from the workplace to the house is ensured, a minimum amount of charge is basically maintained in the storage device, i.e. can be supplied to the supply network. Can be programmed.

In addition, it is understood that the vehicle power management system is capable of program mode in the power management system so that it can be set by the user in any possible way as desired by the user while there is a possibility of supplying it to the power supply network if necessary. will be.

As can be seen in FIG. 2, the current / energy demand of the electricity supply facility (ESU) is not linearly distributed throughout the day, but rises from the early morning low (approximately between 1am and 3am) to the first. As it reaches the morning peak, after which it reaches its highest peak, the noon peak, and then decreases irregularly as it goes back to night. Even during peak times, a power supply network that ensures that sufficient electrical energy is always available to consumers connected to the power supply network must not only ensure that the supply network has enough energy, but also at a constant voltage level and constant frequency, even during emergency peak times. There must always be sufficient energy available to meet the supply of electricity by electrical energy. It is evident from the producer side and from the viewpoint of electrical energy distribution that many control adjustment means are required for this purpose.

Figure 3 shows one embodiment of the state of charge of the electrical storage device of the vehicle according to the present invention. An electrical storage device that charges with a nighttime current at night and shows a 100 percent charge rate (I) loses its charge while going to work in the morning (II). When you arrive at the workplace and connect the vehicle to the electricity supply network by electric line (III), the state of charge returns to 100 percent again. At noon time IV, i.e., at the noon peak (see Fig. 2), most of the electrical energy stored in the storage device is supplied to the connected electrical supply network so that the state of charge falls to a predetermined minimum value in a very short time. These minimums can be set by the vehicle manufacturer or by the user (and may be set in other ways, of course) and should be secured enough to allow them to return home without precharging the vehicle.

In the example shown, however, the state of charge may be increased again in the afternoon VI by receiving energy from the supply network and may be lowered again while returning home (VII). Then, when the electric vehicle is connected to the power supply network, the state of charge may be restored to a predetermined value (100%) again in the evening / nighttime (VIII).

It should be noted once again that the configuration of FIG. 3 is provided only as a preferred embodiment.

If the electric vehicle is provided with an appropriate input surface, the vehicle user can perform many setting adjustments.

Thus, when connected to the electricity supply network, the user can predetermine in a suitable input method the time period during which only the discharge of the electrical storage device can occur.

The user can know when the energy is supplied to the electricity supply network and the amount of energy supplied even after a few days by corresponding documentation indicating the charging and discharging operation.

In addition to the electrical storage device, for example, it is possible to apply a lithium battery or other storage technology, and the vehicle according to the present invention is equipped with a suitable power management program for controlling the state of charge of the electrical storage device, evaluating the user input and documenting it. .

In addition, the vehicle may be equipped with a suitable data interface, in addition to a receiver / transmitter for wireless (mobile phone) control, to transmit and receive all data necessary for charging and discharging (supply to the network) by means of a suitable interface of the power supply facility. Can be.

This facilitates the documentation of each charge / discharge state / time and charging. With regard to billing, it should be taken into account that the current supplied to the network at noon peaks can be compensated at a price that is better than the midnight current, which is usually available in relatively large quantities at low cost without any problems.

It may also be used to charge the power supply network adequately to supply the electrical energy to be consumed later to discharge the storage device so that the vehicle with another electrical storage device with a low state of charge can continue to run.

Thus, the present invention may allow a plurality of vehicles to electrically connect their electrical storage devices to each other.

The present invention can convert the current (voltage) of the electric storage device of the vehicle by the inverter 60 to be supplied to the current source to be supplied to the current source (network). Such an inverter may be provided in each vehicle, but on the other hand, the current of the energy storage device is first supplied from the vehicle by direct current transmission, and then provided to the outside of the vehicle (from the vehicle, the network and The connection of the vehicle allows the power supplied from the vehicle to be produced by the inverter (eg 50 Hz, network voltage, etc.) for supply to the network.

It is also a particular advantage of the present invention that a central inverter station is provided for the delivery of direct current for the storage device in the vehicle as well as for the supply of alternating current to the network. Here, such a network is provided in a garage facility (e.g., at an airport) because a large amount of electrical energy can occur when a large number of vehicles according to the invention are connected. In this way, the cost of the inverter is maintained at a relatively low level as a whole, and because it is relatively simple to control individual or relatively large inverter stations, rather than many small inverters in vehicles that can cause disturbances such as harmonics in the network, Systematic exchange supply to the network is possible.

In addition, since the inverter has an efficiency of 1 or less, even if this is only slightly lower than the ideal value of 1, the loss occurring in the in-vehicle inverter (see FIG. 1A) is certainly higher than in the case of a fixed central inverter (see FIG. 1B).

In addition, in the case of in-home connection, the inverter can be connected in the home so that a private vehicle can reliably supply energy to the parking space in the home.

1 is a cycle diagram schematically showing the connection of a vehicle according to the invention to a power supply network;

FIG. 2 is a cycle diagram showing a typical daily chart of power demand for a power supply facility. FIG.

3 is a cycle diagram showing the state of charge by the state of charge of the vehicle according to the present invention.

Claims (13)

At least one electric motor for driving a motor vehicle, An energy storage device for providing driving energy to the electric motor; A plug connector connected to the energy storage device for connection with a current source, Control means for controlling the flow of current between the current source and the energy storage device As a motor vehicle having: An inverter is provided inside or outside of the motor vehicle, by which the power of the energy storage device is converted into an alternating current and supplied to the current source, The control means has a device for detecting the amount of energy charged in the energy storage device, stopping the flow of current from the energy storage device to the current source when the energy charge reaches a predetermined remaining charge threshold, An input means is provided to be connected to the control means such that the user of the motor vehicle can set a time or time period by the input means, and energy is discharged from the energy storage device within the set time or time period. A motor vehicle, wherein the supply of energy to the current source can be at least partially implemented. The motor vehicle as claimed in claim 1, further comprising a communication device for communication between the control means and the current source. The motor vehicle as claimed in claim 1, wherein the control means comprises or is connected to a watch. A method of controlling the current flow between an energy storage device and a network of a motor vehicle, The flow of current from the network to the energy storage device is allowed within a predetermined first time period, and the flow of current from the energy storage device to the network is controlled to flow within a predetermined second time period. How to. A motor vehicle according to claim 1, With electric motor, A storage device for storing electrical energy, A connection for connection with an electricity supply network, Control means for controlling the energy storage device As a motor vehicle having: The control means controls the storage device to discharge energy when the storage device is connected to the electricity supply network, The control means includes a device for detecting a charge amount in the energy storage device, so as to stop current flow from the energy storage device to the network when a threshold of a predetermined remaining charge amount is reached, An input means connected to the control means is provided, by which the user of the motor vehicle can set a time or time period, and discharge to the supply network or to the supply network within the time or time period. A motor vehicle, characterized in that the supply of energy can be implemented at least partially. A motor vehicle according to claim 1, wherein the storage device is charged with controlled electrical energy when the storage device is connected to an electrical supply network. A motor vehicle according to claim 1, wherein said control means is linked to a power management program, said power management program causing an automatic charging or discharging operation of said storage device when said motor vehicle is connected to an electricity supply network. Motor vehicle made. A plurality of connection portions are provided for connecting the motor vehicle according to claim 1, wherein the electricity supply network is provided. A method of operating an electrical supply network according to claim 8, wherein the motor vehicle to be connected to the electrical supply network comprises at least one electric motor for driving it, an energy storage device for providing driving energy to the electric motor, A motor vehicle having a plug connector connected to the energy storage device for connection with an electricity supply network, and control means for controlling the flow of current between the electricity supply network and the energy storage device, wherein the motor vehicle is provided in or inside the motor vehicle. An inverter is provided externally, by which the power of the energy storage device can be converted into an alternating current form and supplied to the electricity supply network, wherein the control means is a device for detecting the amount of energy charge in the energy storage device. With a predetermined amount of energy charge When the charge amount threshold is reached, an input means is provided to stop the flow of current from the energy storage device to the electricity supply network and to be connected to the control means, by which the user of the motor vehicle has a time or period of time. And a plurality of connections for a motor vehicle, characterized in that the energy is discharged from the energy storage device within the set time or time period so that energy supply to the electricity supply network can be at least partially implemented. Discharging is triggered at least in part in the configured storage device. A motor vehicle according to claim 1, wherein the motor vehicle is attached with an ammeter or an energy cell measuring electric energy supplied to the storage device or energy supplied to the supply network. A motor vehicle according to claim 1, characterized in that the motor vehicle is provided with a recording unit which checks when the electric energy is charged in the storage device and the amount charged or when it is supplied to the electricity supply network. Motor vehicle made. A motor vehicle according to claim 1, wherein the motor vehicle has an electrical connection plug, the electrical connection plug can be connected to a corresponding connection plug of the electrical supply network, the connection plug having a ground wire, and by means of the ground wire The data of the motor vehicle can be exchanged via a data network of an electricity supply facility, and data including data concerning the state of the electrical storage device of the motor vehicle can be supplied via the data network. Motor vehicles. A motor vehicle according to claim 1, wherein an inverter is provided outside the motor vehicle, and a current of the energy storage means of the motor vehicle is provided for supplying to a current source.

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