阅读说明：本技术 一种电动汽车充电堆系统 (Electric automobile charging stack system ) 是由 陈清 覃智发 王敏悦 喻枫 邢孔宝 张修德 于 2019-08-21 设计创作，主要内容包括：本发明属于电子电路技术领域,提供了一种电动汽车充电堆系统,包括电源柜和至少两个充电终端,电源柜对电源信号进行功率变换后,通过充电终端对相应的电动汽车进行充电；其中,电源柜设有第一载波通信模块,每个充电终端均设有第二载波通信模块,第一载波通信模块和第二载波通信模块实现宽带载波通信。由此提高了电动汽车充电堆系统中电源柜和充电终端通信的可靠性,减少功率线缆和通信线缆的干扰问题,规避由于通信受干扰导致充电过程中的跳枪现象；并且基于宽带载波通信技术的电动汽车充电堆系统,使得通信带宽被大幅提升,充电终端能够将系统和电源柜更多的信息进行收集整理,能更加准确分析电源柜及各个充电终端的工作状态,提升系统可靠性。(The invention belongs to the technical field of electronic circuits, and provides an electric vehicle charging pile system which comprises a power supply cabinet and at least two charging terminals, wherein after power conversion is carried out on a power supply signal by the power supply cabinet, a corresponding electric vehicle is charged through the charging terminals; the power cabinet is provided with a first carrier communication module, each charging terminal is provided with a second carrier communication module, and the first carrier communication module and the second carrier communication module realize broadband carrier communication. Therefore, the reliability of communication between the power cabinet and the charging terminal in the electric vehicle charging pile system is improved, the interference problem of a power cable and a communication cable is reduced, and the gun jumping phenomenon in the charging process caused by interference of communication is avoided; and electric automobile charges and piles the system based on broadband carrier communication technique for communication bandwidth is promoted by a wide margin, and charging terminal can collect the arrangement with more information of system and power cabinet, can more accurate analysis power cabinet and each charging terminal's operating condition, promotes system reliability.)

1. An electric vehicle charging stack system, comprising:

the power supply cabinet is connected with the alternating current power distribution and is used for performing power conversion on a power supply signal output by the alternating current power distribution; and

the at least two charging terminals are connected with the power cabinet and used for charging corresponding electric automobiles according to the power signals after power conversion;

wherein, the power cabinet includes:

the power cabinet control module is used for generating a control signal; and

the first carrier communication module is connected with the power cabinet control unit and used for modulating the control signal into a high-frequency carrier signal and transmitting the high-frequency carrier signal to the charging terminal;

and, each of the charging terminals includes:

the second carrier communication module is connected with the first carrier communication module, realizes broadband carrier communication, and is used for demodulating the high-frequency carrier signal, analyzing charging information and reporting the charging information; and

and the charging control module is connected with the second carrier communication module and used for controlling the charging of the electric automobile according to the charging information.

2. The electric vehicle charging stack system of claim 1, further comprising:

the electric vehicle charging system comprises a plurality of charging guns, one charging gun is connected with one charging terminal, the charging gun is used for being in butt joint with the electric vehicle and transmitting a power supply signal to charge the electric vehicle.

3. The electric vehicle charging stack system of claim 1, wherein the power cabinet further comprises:

the plurality of charging modules are connected with the power cabinet control module and used for performing power conversion on the power signals output by the alternating current power distribution; and

and the switching matrix module is connected with the plurality of charging modules, and is used for performing grouping scheduling on the power supply signals after power conversion and correspondingly outputting the power supply signals to at least two charging terminals.

4. The electric vehicle charging stack system of claim 1, wherein the power cabinet further comprises:

and the first auxiliary power supply is connected with the alternating current distribution module and the first carrier communication module and is used for coupling a power supply signal and the high-frequency carrier signal through a single-phase alternating current cable and transmitting the coupled power supply signal to the at least two charging terminals.

5. The electric vehicle charging stack system of claim 4, wherein each of the charging terminals comprises:

and the second auxiliary power supply is connected with the second carrier communication module and the first auxiliary power supply, and is used for receiving the power supply signal to enable the charging terminal to operate and transmitting the high-frequency carrier signal to the second carrier communication module.

6. The electric vehicle charging stack system of claim 3, wherein at least two of the charging terminals are connected in cascade and controlled by the switching matrix module.

7. The electric vehicle charging stack system according to claim 1, wherein the first carrier communication module and the second carrier communication module are matched for use, and both the first carrier communication module and the second carrier communication module are implemented by using carrier communication chips.

8. The electric vehicle charging stack system of claim 3, wherein the switching matrix module comprises a matrix switch.

Technical Field

The invention belongs to the technical field of electronic circuits, and particularly relates to an electric automobile charging stack system.

Background

The electric vehicle charging pile, also called as an electric vehicle flexible charging system, has small total installed capacity and a plurality of service vehicles based on flexible power distribution, and can realize high-power direct-current fast charging and low-power slow charging according to the operation shift and the power grid load of the electric vehicle by intelligent scheduling. The charging pile generally consists of a power supply cabinet responsible for power conversion and a charging terminal responsible for pile butt joint, and the number of the charging terminals is generally large.

Besides the butt joint of the high-voltage direct-current power cable, a large number of communication cables are also arranged between the charging terminal and the power cabinet, and at present, a network cable or other shielding cables are commonly used. Because the charging terminal also needs a built-in auxiliary power supply, a single-phase alternating current input is needed. Thus, at least three types of cables, including a high voltage dc power cable, a low voltage ac cable, and a weak electrical communication cable, will be required for the charging terminal during construction operations. In actual work progress, three kinds of cables can not be placed by independent grooves, and have long distance and walk the line with the winding, cause serious interference to charging terminal and power cabinet communication, lead to the bit error rate to improve, will lead to charging the unusual interrupt when serious.

Therefore, the existing electric vehicle charging technology has the problems that due to unreasonable wiring, a communication cable is interfered, and the charging reliability is influenced.

Disclosure of Invention

In view of the above disadvantages of the prior art, an object of the present invention is to provide a charging stack system for an electric vehicle, so as to solve the problem that the charging reliability is affected due to interference on a communication cable caused by unreasonable wiring in the conventional charging technology for an electric vehicle.

The invention provides an electric automobile charging pile system, which comprises:

the power supply cabinet is connected with the alternating current power distribution and is used for performing power conversion on a power supply signal output by the alternating current power distribution; and

the at least two charging terminals are connected with the power cabinet and used for charging corresponding electric automobiles according to the power signals after power conversion;

wherein, the power cabinet includes:

the power cabinet control module is used for generating a control signal; and

the first carrier communication module is connected with the power cabinet control unit and used for modulating the control signal into a high-frequency carrier signal and transmitting the high-frequency carrier signal to the charging terminal;

and, each of the charging terminals includes:

the second carrier communication module is connected with the first carrier communication module, realizes broadband carrier communication, and is used for demodulating the high-frequency carrier signal, analyzing charging information and reporting the charging information; and

and the charging control module is connected with the second carrier communication module and used for controlling the charging of the electric automobile according to the charging information.

Preferably, the method further comprises the following steps:

the electric vehicle charging system comprises a plurality of charging guns, one charging gun is connected with one charging terminal, the charging gun is used for being in butt joint with the electric vehicle and transmitting a power supply signal to charge the electric vehicle.

Preferably, the power supply cabinet further comprises:

the plurality of charging modules are connected with the power cabinet control module and used for performing power conversion on the power signals output by the alternating current power distribution; and

and the switching matrix module is connected with the plurality of charging modules, and is used for performing grouping scheduling on the power supply signals after power conversion and correspondingly outputting the power supply signals to at least two charging terminals.

Preferably, the power supply cabinet further comprises:

and the first auxiliary power supply is connected with the alternating current distribution module and the first carrier communication module and is used for coupling a power supply signal and the high-frequency carrier signal through a single-phase alternating current cable and transmitting the coupled power supply signal to the at least two charging terminals.

Preferably, each of the charging terminals includes:

and the second auxiliary power supply is connected with the second carrier communication module and the first auxiliary power supply, and is used for receiving the power supply signal to enable the charging terminal to operate and transmitting the high-frequency carrier signal to the second carrier communication module.

Preferably, at least two of the charging terminals are connected in cascade and controlled by the switching matrix module.

Preferably, the first carrier communication module and the second carrier communication module are matched for use, and both the first carrier communication module and the second carrier communication module are implemented by using carrier communication chips.

Preferably, the switching matrix module comprises a matrix switcher.

The invention provides an electric automobile charging stack system which comprises a power cabinet and at least two charging terminals, wherein after power conversion is carried out on a power signal output by alternating current power distribution by the power cabinet, the corresponding electric automobile is charged through the charging terminals; the power cabinet is provided with a first carrier communication module, each charging terminal is provided with a second carrier communication module, and the first carrier communication module and the second carrier communication module realize broadband carrier communication. Therefore, the reliability of communication between the power cabinet and the charging terminal in the electric vehicle charging pile system is improved, the interference problem of a power cable and a communication cable is reduced, and the gun jumping phenomenon in the charging process caused by interference of communication is avoided; and electric automobile charges and piles system based on broadband carrier communication technique for communication bandwidth is promoted by a wide margin, and charging terminal can collect the arrangement with system and power cabinet more information, can more accurate analysis power cabinet and each charging terminal's operating condition, promotes system reliability, has solved current electric automobile charging technique and has had because the wiring is unreasonable, leads to the communication cable to be disturbed, influences the problem of charging reliability.

Drawings

Fig. 1 is a schematic structural diagram of an electric vehicle charging stack system according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The electric vehicle charging stack system comprises a power cabinet and at least two charging terminals, wherein after power conversion is carried out on a power signal output by alternating current power distribution by the power cabinet, the corresponding electric vehicle is charged through the charging terminals; the power cabinet is provided with a first carrier communication module, each charging terminal is provided with a second carrier communication module, and the first carrier communication module and the second carrier communication module realize broadband carrier communication. Therefore, the reliability of communication between the power cabinet and the charging terminal in the electric vehicle charging pile system is improved, the interference problem of a power cable and a communication cable is reduced, and the gun jumping phenomenon in the charging process caused by interference of communication is avoided; and electric automobile charges and piles the system based on broadband carrier communication technique for communication bandwidth is promoted by a wide margin, and charging terminal can collect the arrangement with more information of system and power cabinet, can more accurate analysis power cabinet and each charging terminal's operating condition, promotes system reliability.

Fig. 1 shows a module structure of an electric vehicle charging stack system according to an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment are shown, and the details are as follows:

the electric vehicle charging pile system comprises a power cabinet 101 and at least two charging terminals 102, wherein the at least two charging terminals 102 are connected in a cascade mode and are respectively connected with the power cabinet 101.

The power supply cabinet 101 is connected to the ac power distribution 104, and the power supply cabinet 101 performs power conversion on a power supply signal output from the ac power distribution 104.

At least two charging terminals 102 are connected with the power cabinet 101, and the at least two charging terminals 102 are used for charging corresponding electric vehicles according to power signals after power conversion.

The power cabinet 101 includes a power cabinet control module 1011 and a first carrier communication module 1012.

The power cabinet control module 1011 is configured to generate a control signal.

The first carrier communication module 1012 is connected to the power cabinet control unit 1011, and is configured to modulate the control signal into a high-frequency carrier signal, and transmit the high-frequency carrier signal to the corresponding charging terminal 102.

Also, each charging terminal 102 includes a second carrier communication module 1022 and a charging control module 1021.

The second carrier communication module 1022 is connected to the first carrier communication module 1012, and implements broadband carrier communication, and is configured to demodulate the high-frequency carrier signal, analyze the charging information, and report the charging information. Because the power cabinet 101 and the charging terminal 102 are both configured with carrier communication modules, modulation and demodulation of broadband carrier signals are realized.

The charging control module 1021 is connected to the second carrier communication module 1022, and is configured to control charging of the electric vehicle according to the charging information.

As an embodiment of the present invention, the electric vehicle charging stack system further includes:

the charging gun comprises a plurality of charging guns 103, one charging gun 103 is connected with one charging terminal 102, and the charging gun 103 is used for being in butt joint with an electric automobile and transmitting a power supply signal to charge the electric automobile.

Specifically, a switch is provided in the charging terminal 102 and connected to the corresponding charging gun 103, and when the charging terminal 102 receives the charging information, the switch is controlled to be closed to transmit a power signal and charge the electric vehicle through the charging gun 103.

As an embodiment of the present invention, the power cabinet 101 further includes:

the plurality of charging modules 1014 are connected with the power cabinet control module 1011 and used for performing power conversion on power signals output by the alternating-current power distribution 1014; and

the switching matrix module 1015 is connected to the plurality of charging modules 1014, and is configured to perform packet scheduling on the power signals after power conversion, and correspondingly output the power signals to at least two charging terminals 102.

As an embodiment of the present invention, the power cabinet 101 further includes:

the first auxiliary power source 1013 is connected to the ac power distribution 104 and the first carrier communication module 1012, and is configured to couple the power supply signal and the high-frequency carrier signal via a single-phase ac cable and transmit the coupled power supply signal to the at least two charging terminals 102.

As an embodiment of the present invention, each of the charging terminals 102 described above includes:

the second auxiliary power supply 1023 is connected to the second carrier communication module 1022 and the first auxiliary power supply 1013, and is configured to receive a power supply signal to operate the charging terminal 102, and transmit a high-frequency carrier signal to the second carrier communication module 1022.

Specifically, since the high-frequency carrier signal for performing wideband carrier communication between the first carrier communication module 1012 and the second carrier communication module 1022 is coupled to the single-phase ac cable, that is, the first auxiliary power supply 1013 and the second auxiliary power supply 1023 transmit the high-frequency carrier signal while transmitting the power supply signal using the single-phase ac cable, the problem of cost increase due to the need of both the weak electrical communication cable and the power cable is avoided.

Moreover, because the first carrier communication module 1012 is built in the power cabinet 101, the charging module 1014 performs packet scheduling through the switching matrix module 1015 under the control of the power cabinet control module 1011, and outputs a plurality of paths of high-voltage direct-current cables to the charging terminals 102 with different numbers respectively; meanwhile, the power supply cabinet 101 provides one path of single-phase alternating current for providing an auxiliary power supply for the charging terminal 102, and the first carrier communication module 1012 couples the broadband high-frequency signal to the single-phase alternating current cable and transmits the signal to the charging terminal 102; the second carrier communication module 1022 is built in the charging terminal 102, so that the signal modulation and demodulation function is realized, and data interaction between the power cabinet 101 and the charging terminal 102 is realized through broadband carrier communication. The broadband carrier communication can overcome the problems of obvious noise and serious signal attenuation of signals in a low-voltage alternating-current cable, reduce passive absorption and burst interference of the signals and realize reliable communication between the power cabinet 101 and the charging terminal 102 of data. The electric automobile charging pile system using broadband carrier communication has the advantages that the system cost is lower, the construction is easier, the communication reliability is greatly improved, and a large amount of engineering auxiliary material funds and engineering cost are saved for a charging station operator. Meanwhile, the power cabinet 101 provides a low-voltage alternating-current power supply, and unified measurement and management of the loss of the overall auxiliary power supply of the system can be realized.

As an embodiment of the present invention, the at least two charging terminals 102 are connected in cascade and controlled by the switching matrix module 1015. Grouping scheduling is performed through the switching matrix module 1015, intelligent scheduling can be performed, and high-power direct-current fast charging and low-power slow charging of the electric automobile can be achieved.

As an embodiment of the present invention, the first carrier communication module 1012 and the second carrier communication module 1022 are used in a matching manner, and both the first carrier communication module 1012 and the second carrier communication module 1022 are implemented by using carrier communication chips.

As an embodiment of the invention, the switching matrix module 1015 includes a matrix switch.

As an embodiment of the present invention, the power cabinet control module 1011 and the charging control module 1021 are both implemented by a microprocessor, or implemented by an existing control circuit, as long as the functions described in the embodiment can be performed.

The advantages of the above-mentioned electric automobile charging stack system are embodied in the following points:

1. the engineering cost and the construction difficulty are reduced, and weak current engineering in the field power construction process is reduced;

2. the reliability of communication between a power cabinet and a charging terminal in an electric vehicle charging pile system is improved, the problem of interference between a power cable and a communication cable is reduced, and the phenomenon of gun jumping in the charging process due to interference of communication is avoided;

3. according to the electric vehicle charging pile system based on the broadband carrier communication technology, the communication bandwidth in the system is greatly improved, more information of the system and a power supply cabinet can be collected and sorted by the charging terminal, the working states of the power supply cabinet and each charging terminal can be more accurately analyzed, and the reliability of the system is improved;

4. the charging terminals can communicate with each other through broadband carrier waves, even 1 or 2 charging terminals are only required to be reserved with external networking interfaces, and other charging terminals are communicated through broadband carrier waves and forwarded and reported by the charging terminals reserved with the external communication interfaces, so that the cost and the investment of network equipment are further reduced.

The working principle of the electric vehicle charging stack system is described with reference to fig. 1:

when a user starts charging, the charging terminal 102 performs handshake with the electric vehicle according to the national standard requirement, the charging terminal 102 synchronously issues control data to the second carrier communication module 1022, and the second carrier communication module 1022 modulates the control data into a broadband carrier and transmits the broadband carrier to the power cabinet 101 through an alternating current power line; the first carrier communication module 1012 built in the power cabinet 101 demodulates the detected signal, analyzes the control data issued by the charging terminal 102, and reports the data to the built-in power cabinet control module 1011, and the power cabinet control module 1011 schedules and manages the charging module 1014 according to the requirements of the charging terminal 102. Meanwhile, the power cabinet control module 1011 sends the information reported by the charging module 1014 to a first carrier communication module 1012 arranged in the power cabinet 101, and the first carrier communication module 1012 modulates the charging information into a high-frequency carrier signal and transmits the high-frequency carrier signal to the charging terminal 102 through a power line; the charging terminal 102 is internally provided with a second carrier communication module 1022, which demodulates the received broadband carrier signal, analyzes the charging information, and reports the charging information to the charging control module 1021 to control charging of the electric vehicle.

To sum up, the electric vehicle charging stack system provided by the embodiment of the invention comprises a power supply cabinet and at least two charging terminals, wherein after the power supply cabinet performs power conversion on a power supply signal output by alternating current power distribution, the corresponding electric vehicle is charged through the charging terminals; the power cabinet is provided with a first carrier communication module, each charging terminal is provided with a second carrier communication module, and the first carrier communication module and the second carrier communication module realize broadband carrier communication. Therefore, the reliability of communication between the power cabinet and the charging terminal in the electric vehicle charging pile system is improved, the interference problem of a power cable and a communication cable is reduced, and the gun jumping phenomenon in the charging process caused by interference of communication is avoided; and electric automobile charges and piles system based on broadband carrier communication technique for communication bandwidth is promoted by a wide margin, and charging terminal can collect the arrangement with system and power cabinet more information, can more accurate analysis power cabinet and each charging terminal's operating condition, promotes system reliability, has solved current electric automobile charging technique and has had because the wiring is unreasonable, leads to the communication cable to be disturbed, influences the problem of charging reliability.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.