阅读说明：本技术 一种充电系统以及一种电车 (Charging system and electric car ) 是由 李京 高蕾 谢斌 陈中玉 肖磊 陈超录 罗煌 董其爱 虞鸿基 张晴雪 于 2020-11-16 设计创作，主要内容包括：本发明提供了一种充电系统,适用于可双向行驶的电车,所述充电系统包括：双极性受电弓,所述双极性受电弓的正极板和负极板分别与线网的两根接触线连接；防反电路,所述防反电路的输入端与所述双极性受电弓的输出端连接,并将所述双极性受电弓接收到的线网电压转换为极性一致的直流电压；隔离DCDC电路,所述隔离DCDC电路的输入端与所述防反电路的输出端连接以接收所述防反电路输出的直流电压,所述隔离DCDC电路将所述直流电压转换为电压稳定的直流电源以向所述电车的负载供电；以及视频监测设备,用于监测所述双极性受电弓与所述线网的相对位置,并响应于所述双极性受电弓与所述线网的相对位置超出预设阈值,产生偏离预警。(The present invention provides a charging system suitable for an electric car capable of bidirectional travel, the charging system including: the positive plate and the negative plate of the bipolar pantograph are respectively connected with two contact wires of a wire mesh; the input end of the anti-reverse circuit is connected with the output end of the bipolar pantograph and converts the line network voltage received by the bipolar pantograph into direct current voltage with consistent polarity; the input end of the isolation DCDC circuit is connected with the output end of the anti-reverse circuit so as to receive the direct-current voltage output by the anti-reverse circuit, and the isolation DCDC circuit converts the direct-current voltage into a direct-current power supply with stable voltage so as to supply power to a load of the electric car; and the video monitoring equipment is used for monitoring the relative position of the bipolar pantograph and the wire mesh and generating deviation early warning in response to the fact that the relative position of the bipolar pantograph and the wire mesh exceeds a preset threshold value.)

1. A charging system adapted for a two-way travelable electric car, the charging system comprising:

the positive plate and the negative plate of the bipolar pantograph are respectively connected with two contact wires of a wire mesh;

the input end of the anti-reverse circuit is connected with the output end of the bipolar pantograph and converts the line network voltage received by the bipolar pantograph into direct current voltage with consistent polarity;

the input end of the isolation DCDC circuit is connected with the output end of the anti-reverse circuit so as to receive the direct-current voltage output by the anti-reverse circuit, and the isolation DCDC circuit converts the direct-current voltage into a direct-current power supply with stable voltage so as to supply power to a load of the electric car; and

and the video monitoring equipment is used for monitoring the relative position of the bipolar pantograph and the wire mesh and generating deviation early warning in response to the fact that the relative position of the bipolar pantograph and the wire mesh exceeds a preset threshold value.

2. The charging system of claim 1, wherein the bipolar pantograph is a carbon sled pantograph.

3. The charging system of claim 1, wherein the video monitoring device further monitors the relative position of the tram and its set virtual track and generates a departure warning in response to the tram deviating from its set virtual track.

4. The charging system according to claim 1 or 3, wherein the video monitoring device sends the departure warning to a full car control system of the electric car so that the full car control system controls the bipolar pantograph.

5. The charging system according to claim 1, wherein the reverse-polarity preventing circuit is a full-wave rectifying circuit.

6. The charging system of claim 1, wherein the isolated DCDC circuit comprises:

the filter circuit is used for shielding high-frequency interference signals on the wire mesh;

the pre-charging circuit is used for preventing voltage abrupt change; and

the DC-DC conversion circuit comprises a single-phase full-bridge inverter circuit and a rectification circuit.

7. A bidirectionally drivable electric vehicle comprising a charging system, said charging system comprising:

the positive plate and the negative plate of the bipolar pantograph are respectively connected with two contact wires of a wire mesh;

the input end of the anti-reverse circuit is connected with the output end of the bipolar pantograph and converts the line network voltage received by the bipolar pantograph into direct current voltage with consistent polarity;

the input end of the isolation DCDC circuit is connected with the output end of the anti-reverse circuit so as to receive the direct-current voltage output by the anti-reverse circuit, and the isolation DCDC circuit converts the direct-current voltage into a direct-current power supply with stable voltage so as to supply power to a load of the electric car; and

and the video monitoring equipment is used for monitoring the relative position of the bipolar pantograph and the wire mesh and generating deviation early warning in response to the fact that the relative position of the bipolar pantograph and the wire mesh exceeds a preset threshold value.

8. The trolley of claim 7, wherein the bipolar pantograph is a carbon skateboard pantograph.

9. The trolley of claim 7 wherein the video monitoring device further monitors the relative position of the trolley to its set virtual track and generates a departure warning in response to the trolley deviating from its set virtual track.

10. The electric vehicle according to claim 7 or 9, further comprising a full vehicle control system, the full vehicle control system being connected to the charging system, the video monitoring device sending the deviation warning to the full vehicle control system, the full vehicle control system controlling the bipolar pantograph to pantograph in response to receiving the deviation warning.

11. The charging system according to claim 7, wherein the reverse-polarity preventing circuit is a full-wave rectifying circuit.

12. The charging system of claim 7, wherein the isolated DCDC circuit comprises:

the filter circuit is used for shielding high-frequency interference signals on the wire mesh;

the pre-charging circuit is used for preventing voltage abrupt change; and

and the DCDC conversion circuit comprises a single-phase full-bridge inverter circuit and a rectifying circuit.

Technical Field

The invention relates to the field of charging of electric vehicles, in particular to a charging system and an electric vehicle comprising the same.

Background

The electric car is a common public transport passenger car, and comprises a rail electric car, a light rail electric car, a tramcar and the like. The existing rail electric cars, light rail electric cars and tramcars need a special electric power system and a rail to cooperate to realize operation, and the infrastructure construction and vehicle acquisition cost are high. In order to solve the problem, the middle school bus group provides an electric bus concept capable of tracking the virtual track on the ground, and the novel electric bus cancels a steel rail and runs along the virtual track on the ground in a mode of rubber wheel bearing and steering of a steering wheel.

The virtual track on the ground can be flexibly arranged, special capital construction does not need to be carried out on the ground, and the virtual track for driving the novel trolley bus only needs to be drawn on the ground like a lane line and a zebra crossing. This kind of novel trolley-bus need not to travel along the fixed track again, and greatly reduced capital construction cost, has huge operation advantage for the tram. Meanwhile, the novel electric car has the running characteristics of road right sharing and mixed traffic, so that the traffic system has the advantage of flexible organization in the aspects of ground lane arrangement and the like.

With the increasing concern of the problem of influence on environmental pollution and energy crisis, the development of new energy electric vehicles is more and more emphasized, and compared with the traditional electric vehicles, the new energy electric vehicles have certain upper limit because of limited space of the vehicles, and the electric quantity which can be borne by the vehicle-mounted energy storage system. The energy-storage rubber-wheel tramcar has the characteristics of a new energy tramcar and the running characteristics of 'sharing right of way and mixed traffic' at the same time, and becomes a better choice for public transport vehicles. However, when the energy storage type rubber wheel tramcar runs for a long distance, due to the electric quantity limitation of the energy storage system, the problem of insufficient endurance mileage exists.

The invention provides a charging system for solving the problem of insufficient energy storage of an energy storage type rubber-tyred tramcar, and simultaneously, for preventing a pantograph in the charging system from physically constraining the tramcar.

Disclosure of Invention

The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

According to an aspect of the present invention, there is provided a charging system adapted for a bidirectional travelable electric car, the charging system including: the positive plate and the negative plate of the bipolar pantograph are respectively connected with two contact wires of a wire mesh; the input end of the anti-reverse circuit is connected with the output end of the bipolar pantograph and converts the line network voltage received by the bipolar pantograph into direct current voltage with consistent polarity; the input end of the isolation DCDC circuit is connected with the output end of the anti-reverse circuit so as to receive the direct-current voltage output by the anti-reverse circuit, and the isolation DCDC circuit converts the direct-current voltage into a direct-current power supply with stable voltage so as to supply power to a load of the electric car; and the video monitoring equipment is used for monitoring the relative position of the bipolar pantograph and the wire mesh and generating deviation early warning in response to the fact that the relative position of the bipolar pantograph and the wire mesh exceeds a preset threshold value.

In one embodiment, the bipolar pantograph is a carbon slide plate pantograph.

In one embodiment, the video monitoring device also monitors the relative position of the tram and its set virtual track and generates a departure warning in response to the tram deviating from its set virtual track.

In an embodiment, the video monitoring device sends the deviation warning to a vehicle control system of the electric vehicle so that the vehicle control system controls the bipolar pantograph to bow.

In one embodiment, the anti-reverse circuit is a full-wave rectification circuit.

In one embodiment, the isolated DCDC circuit includes: the filter circuit is used for shielding high-frequency interference signals on the wire mesh; the pre-charging circuit is used for preventing voltage abrupt change; and the DCDC conversion circuit comprises a single-phase full-bridge inverter circuit and a rectification circuit.

According to another aspect of the present invention, there is also provided a bidirectional travelable electric car including a charging system including: the positive plate and the negative plate of the bipolar pantograph are respectively connected with two contact wires of a wire mesh; the input end of the anti-reverse circuit is connected with the output end of the bipolar pantograph and converts the line network voltage received by the bipolar pantograph into direct current voltage with consistent polarity; the input end of the isolation DCDC circuit is connected with the output end of the anti-reverse circuit so as to receive the direct-current voltage output by the anti-reverse circuit, and the isolation DCDC circuit converts the direct-current voltage into a direct-current power supply with stable voltage so as to supply power to a load of the electric car; and the video monitoring equipment is used for monitoring the relative position of the bipolar pantograph and the wire mesh and generating deviation early warning in response to the fact that the relative position of the bipolar pantograph and the wire mesh exceeds a preset threshold value.

In one embodiment, the bipolar pantograph is a carbon slide plate pantograph.

In one embodiment, the video monitoring device also monitors the relative position of the tram and its set virtual track and generates a departure warning in response to the tram deviating from its set virtual track.

In an embodiment, the system further comprises a whole vehicle control system, the whole vehicle control system is connected with the charging system, the video monitoring device sends the deviation early warning to the whole vehicle control system, and the whole vehicle control system controls the bipolar pantograph to bow in response to receiving the deviation early warning.

In one embodiment, the anti-reverse circuit is a full-wave rectification circuit.

In one embodiment, the isolated DCDC circuit includes: the filter circuit is used for shielding high-frequency interference signals on the wire mesh; the pre-charging circuit is used for preventing voltage abrupt change; and the DCDC conversion circuit comprises a single-phase full-bridge inverter circuit and a rectifying circuit.

Drawings

The above features and advantages of the present disclosure will be better understood upon reading the detailed description of embodiments of the disclosure in conjunction with the following drawings.

Fig. 1 is a schematic structural diagram of a charging system in an embodiment according to an aspect of the present invention;

FIG. 2 is a circuit diagram of an anti-reverse circuit in an embodiment according to another aspect of the present invention;

FIG. 3 is a schematic circuit diagram of an isolated DCDC circuit in an embodiment according to another aspect of the present invention;

fig. 4 is a schematic structural diagram of a two-way travelable electric car in an embodiment according to another aspect of the present invention.

Detailed Description

The following description is presented to enable any person skilled in the art to make and use the invention and is incorporated in the context of a particular application. Various modifications, as well as various uses in different applications will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to a wide range of embodiments. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

In the following detailed description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the practice of the invention may not necessarily be limited to these specific details. In other instances, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the present invention.

The reader's attention is directed to all papers and documents which are filed concurrently with this specification and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference. All the features disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.

Note that where used, the designations left, right, front, back, top, bottom, positive, negative, clockwise, and counterclockwise are used for convenience only and do not imply any particular fixed orientation. In fact, they are used to reflect the relative position and/or orientation between the various parts of the object. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It is noted that, where used, further, preferably, still further and more preferably is a brief introduction to the exposition of the alternative embodiment on the basis of the preceding embodiment, the contents of the further, preferably, still further or more preferably back band being combined with the preceding embodiment as a complete constituent of the alternative embodiment. Several further, preferred, still further or more preferred arrangements of the belt after the same embodiment may be combined in any combination to form a further embodiment.

The invention is described in detail below with reference to the figures and specific embodiments. It is noted that the aspects described below in connection with the figures and the specific embodiments are only exemplary and should not be construed as imposing any limitation on the scope of the present invention.

According to an aspect of the present invention, there is provided a charging system suitable for a bidirectional travelable electric car.

The electric car running in two directions is an electric car which is provided with a cab at the head and the tail of the electric car and can carry out driving operation in either the cab at the head or the tail of the electric car so as to realize that the cab is taken as the actual head direction in the running process. It is understood that the existing electric vehicle running in one direction only needs one-way power supply, so that a single-polarity pantograph can be adopted, and the freedom of the existing electric vehicle can be stronger. However, the unipolar pantograph cannot meet the charging requirement of the electric car capable of running in two directions.

In a particular embodiment, as shown in fig. 1, a charging system suitable for a two-way capable electric vehicle may include a bipolar pantograph 110, an anti-kickback circuit 120, an isolated DCDC circuit 130, and a video monitoring device 140.

The bipolar pantograph 110 includes a positive plate and a negative plate, which are respectively connected to two contact wires of a power supply line network to obtain ac power from the power supply line network. Preferably, the bipolar pantograph 110 may be a carbon slide plate pantograph.

The input terminal of the anti-reverse circuit 120 is connected to the output terminal of the bipolar pantograph 110, and converts the line network voltage received by the bipolar pantograph into a dc voltage with the same polarity. It can be understood that the net voltage received by the bipolar pantograph is an alternating current, i.e. has a positive voltage and a negative voltage, and the anti-reflection circuit 120 converts the positive voltage or the negative voltage output by the bipolar pantograph into a voltage in the same direction and outputs the voltage to the subsequent circuit of the charging system.

Preferably, in one embodiment, the anti-reverse circuit 120 may employ a full-wave rectification circuit. As shown in fig. 2, the debounce circuit 120 may have a diode group D1, a diode group D2, a diode group D3, and a diode group D4, wherein each group of diodes includes two diodes of the same parameters connected in parallel. When the voltage provided by the input end is positive phase voltage, the voltage of the input end is output to the output end through the diode group D1 and the diode group D4; when the voltage provided by the input terminal is the inverted voltage, the voltage of the input terminal is output to the output terminal through the diode group D2 and the diode group D3.

The input terminal of the isolation DCDC circuit 130 is connected to the output terminal of the anti-reverse circuit 120 to receive the dc voltage output by the anti-reverse circuit 130, and convert the dc voltage into a voltage-stabilized dc power supply to supply power to each load of the electric car.

Preferably, in an embodiment, as shown in fig. 3, the isolated DCDC circuit 130 may include a pre-charge circuit 131, a filter circuit 132, and a DCDC conversion circuit 133.

The precharge circuit 131 is used to precharge the capacitor C1, thereby preventing abrupt voltage change of the DCDC conversion circuit 133. Specifically, as shown in fig. 3, the precharge circuit includes a switching device K1, a switching device K2, and a resistor F1. When the capacitor C1 is precharged, the switching device K1 is opened, and the switching device K2 is closed; in normal operation, the switching device K1 is closed and the switching device K2 is open.

The filter circuit 132 is used to shield the high frequency interference signals on the net. As shown in fig. 3, the filter circuit 132 may be a first-order filter circuit.

The DCDC conversion circuit 133 is configured to convert the dc voltage output from the anti-reverse circuit 120 into a dc voltage of a fixed voltage value to charge an energy storage element of the electric vehicle or supply power to a vehicle-mounted load. As shown in fig. 3, the DCDC conversion circuit may include a single-phase full-bridge inverter circuit and a full-wave rectifier circuit.

It is understood that the isolated DCDC circuit 130 has the functions of potential isolation, interference absorption isolation and voltage stabilization. The filter circuit 132 can absorb and shield high-frequency electromagnetic interference signals uploaded from a wire mesh, so that the interference of an external environment on the electric vehicle is effectively isolated; the high-frequency transformer T1 enables the power frequency power grid and the vehicle-mounted high-voltage load to be subjected to potential isolation in a magnetic isolation mode, so that no potential difference exists between the vehicle-mounted high-voltage load and the ground, and the problem that passengers get an electric shock due to the fact that a vehicle body is possibly electrified is solved; the DCDC conversion circuit 133 outputs a dc power supply with a stable voltage, stabilizes the dc input voltage of the vehicle-mounted high-voltage load, reduces the insulation design and performance design requirements for the vehicle-mounted high-voltage load, and prolongs the service life of the vehicle-mounted high-voltage load.

The video monitoring device 140 is configured to monitor the relative position of the bipolar pantograph and the wire mesh, and generate a deviation warning in response to the relative position of the bipolar pantograph and the wire mesh exceeding a preset threshold. Specifically, the video monitoring apparatus 140 may collect position image data of the bipolar pantograph and the wire mesh, and monitor the relative position of the bipolar pantograph and the wire mesh by means of image recognition or the like.

Preferably, the video monitoring device 140 may also monitor the relative position of the tram and the virtual track it is set to travel, and generate a departure warning in response to the tram deviating from its set virtual track.

Preferably, the video monitoring device 140 may be connected to a vehicle control unit on the electric train, and send the deviation warning to the vehicle control unit through a communication network, and the vehicle control unit may control the bipolar pantograph 110 to lower the pantograph based on the deviation warning of the video monitoring device 140.

According to another aspect of the present invention, there is also provided a two-way travelable electric car.

The electric car running in two directions is an electric car which is provided with a cab at the head and the tail of the electric car and can carry out driving operation in either the cab at the head or the tail of the electric car so as to realize that the cab is taken as the actual head direction in the running process. It is understood that the existing electric vehicle running in one direction only needs one-way power supply, so that a single-polarity pantograph can be adopted, and the freedom of the existing electric vehicle can be stronger. However, the unipolar pantograph cannot meet the charging requirement of the electric car capable of running in two directions.

In a particular embodiment, as shown in fig. 4, the electric train includes a charging system including a bipolar pantograph 110, an anti-kickback circuit 120, an isolated DCDC circuit 130, and a video monitoring device 140.

The bipolar pantograph 110 includes a positive plate and a negative plate, which are respectively connected to two contact wires of a power supply line network to obtain ac power from the power supply line network. Preferably, the bipolar pantograph 110 may be a carbon slide plate pantograph.

The input terminal of the anti-reverse circuit 120 is connected to the output terminal of the bipolar pantograph 110, and converts the line network voltage received by the bipolar pantograph into a dc voltage with the same polarity. It can be understood that the net voltage received by the bipolar pantograph is an alternating current, i.e. has a positive voltage and a negative voltage, and the anti-reflection circuit 120 converts the positive voltage or the negative voltage output by the bipolar pantograph into a voltage in the same direction and outputs the voltage to the subsequent circuit of the charging system.

Preferably, in one embodiment, the anti-reverse circuit 120 may employ a full-wave rectification circuit. As shown in fig. 2, the debounce circuit 120 may have a diode group D1, a diode group D2, a diode group D3, and a diode group D4, wherein each group of diodes includes two diodes of the same parameters connected in parallel. When the voltage provided by the input end is positive phase voltage, the voltage of the input end is output to the output end through the diode group D1 and the diode group D4; when the voltage provided by the input terminal is the inverted voltage, the voltage of the input terminal is output to the output terminal through the diode group D2 and the diode group D3.

The input terminal of the isolation DCDC circuit 130 is connected to the output terminal of the anti-reverse circuit 120 to receive the dc voltage output by the anti-reverse circuit 130, and convert the dc voltage into a voltage-stabilized dc power supply to supply power to each load of the electric car.

Preferably, in an embodiment, as shown in fig. 3, the isolated DCDC circuit 130 may include a pre-charge circuit 131, a filter circuit 132, and a DCDC conversion circuit 133.

The precharge circuit 131 is used to precharge the capacitor C1, thereby preventing abrupt voltage change of the DCDC conversion circuit 133. Specifically, as shown in fig. 3, the precharge circuit includes a switching device K1, a switching device K2, and a resistor F1. When the capacitor C1 is precharged, the switching device K1 is opened, and the switching device K2 is closed; in normal operation, the switching device K1 is closed and the switching device K2 is open.

The filter circuit 132 is used to shield the high frequency interference signals on the net. As shown in fig. 3, the filter circuit 132 may be a first-order filter circuit.

As shown in fig. 4, the DCDC conversion circuit 133 is configured to convert the dc voltage output from the anti-reverse circuit 120 into a dc voltage of a fixed voltage value to charge an energy storage system of the electric vehicle or supply power to an on-vehicle load, which may include an auxiliary power supply, an air conditioner, a motor controller, a motor, and the like. The DCDC conversion circuit 133 may include a single-phase full-bridge inverter circuit and a full-wave rectifier circuit as shown in fig. 3.

It is understood that the isolated DCDC circuit 130 has the functions of potential isolation, interference absorption isolation and voltage stabilization. The filter circuit 132 can absorb and shield high-frequency electromagnetic interference signals uploaded from a wire mesh, so that the interference of an external environment on the electric vehicle is effectively isolated; the high-frequency transformer T1 enables the power frequency power grid and the vehicle-mounted high-voltage load to be subjected to potential isolation in a magnetic isolation mode, so that no potential difference exists between the vehicle-mounted high-voltage load and the ground, and the problem that passengers get an electric shock due to the fact that a vehicle body is possibly electrified is solved; the DCDC conversion circuit 133 outputs a dc power supply with a stable voltage, stabilizes the dc input voltage of the vehicle-mounted high-voltage load, reduces the insulation design and performance design requirements for the vehicle-mounted high-voltage load, and prolongs the service life of the vehicle-mounted high-voltage load.

The video monitoring device 140 is configured to monitor the relative position of the bipolar pantograph and the wire mesh, and generate a deviation warning in response to the relative position of the bipolar pantograph and the wire mesh exceeding a preset threshold. Specifically, the video monitoring apparatus 140 may collect position image data of the bipolar pantograph and the wire mesh, and monitor the relative position of the bipolar pantograph and the wire mesh by means of image recognition or the like.

Preferably, the video monitoring device 140 may also monitor the relative position of the tram and the virtual track it is set to travel, and generate a departure warning in response to the tram deviating from its set virtual track.

Further, the electric car capable of running in two directions also comprises a whole car control system. The entire vehicle control system is connected with the charging system, the video monitoring device 140 sends a deviation early warning to the entire vehicle control system, and the entire vehicle control system controls the bipolar pantograph 110 to bow in response to receiving the deviation early warning.

Those of skill in the art would understand that information, signals, and data may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits (bits), symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. It is to be understood that the scope of the invention is to be defined by the appended claims and not by the specific constructions and components of the embodiments illustrated above. Those skilled in the art can make various changes and modifications to the embodiments within the spirit and scope of the present invention, and these changes and modifications also fall within the scope of the present invention.