阅读说明：本技术 基于充电桩实现车辆放电的方法 (Method for realizing vehicle discharge based on charging pile ) 是由 张雪凯 邵梦 王涛 李德胜 郑隽一 张育铭 于 2020-12-29 设计创作，主要内容包括：本发明提供了一种基于充电桩实现车辆放电的方法,所述充电桩的工作模式包括充电模式和放电模式,所述方法包括以下步骤：获取所述工作模式的选择指令；若得到所述放电模式的选择指令,则获取所述车辆的需求电压和需求电流；根据所述需求电流输出检测电流以检测所述充电桩与所述车辆之间是否完成连接；若所述充电桩与所述车辆之间完成连接,则切换为所述放电模式；根据所述需求电压和所述需求电流模拟反馈电压电流信息；根据所述模拟的反馈电压电流信息维持所述放电模式以实现所述车辆的持续放电。本发明方法简单,具有较好的适用性。(The invention provides a method for realizing vehicle discharge based on a charging pile, wherein the working mode of the charging pile comprises a charging mode and a discharging mode, and the method comprises the following steps: acquiring a selection instruction of the working mode; if the selection instruction of the discharge mode is obtained, acquiring the required voltage and the required current of the vehicle; outputting a detection current according to the required current to detect whether the connection between the charging pile and the vehicle is completed; if the connection between the charging pile and the vehicle is completed, switching to the discharging mode; simulating feedback voltage and current information according to the demand voltage and the demand current; and maintaining the discharge mode according to the simulated feedback voltage and current information so as to realize the continuous discharge of the vehicle. The method is simple and has better applicability.)

1. A method for realizing vehicle discharge based on a charging pile is characterized in that the working mode of the charging pile comprises a charging mode and a discharging mode, and the method comprises the following steps:

acquiring a selection instruction of the working mode;

if the selection instruction of the discharge mode is obtained, acquiring the required voltage and the required current of the vehicle;

outputting a detection current according to the required current to detect whether the connection between the charging pile and the vehicle is completed;

if the connection between the charging pile and the vehicle is completed, switching to the discharging mode;

simulating feedback voltage and current information according to the demand voltage and the demand current;

and maintaining the discharge mode according to the simulated feedback voltage and current information so as to realize the continuous discharge of the vehicle.

2. The charging pile-based vehicle discharging method according to claim 1, further comprising the following steps before the step of acquiring the required voltage and the required current of the vehicle:

acquiring identification information of the vehicle;

and identifying the identity of the vehicle according to the identification information, and performing insulation detection and charging preparation after the identity identification is finished.

3. The method for realizing vehicle discharge based on the charging pile according to claim 2, wherein a detection current is output according to the required current to detect whether the charging pile is connected with the vehicle or not, and the method comprises the following steps:

outputting a detection current according to the demand current;

detecting whether the detection current passes through a connecting line between the charging pile and the vehicle;

and if the detection current passes through a connecting line between the charging pile and the vehicle, judging that the charging pile and the vehicle are connected.

4. The method for realizing vehicle discharge based on the charging pile according to claim 3, wherein if the detection current does not pass through a connection line between the charging pile and the vehicle, the charging pile is judged not to be connected with the vehicle, and the detection of the connection line between the charging pile and the vehicle is continued.

5. The charging pile-based vehicle discharge realization method according to claim 4, wherein the discharge mode is maintained according to the simulated feedback voltage and current information to realize the continuous discharge of the vehicle, and the method specifically comprises the following steps:

sending the simulated feedback voltage and current information to the vehicle to ensure that the vehicle continuously sends the required voltage and current;

and maintaining the connection between the charging pile and the vehicle according to the required voltage and current so as to realize the continuous discharge of the vehicle.

6. The charging post-based vehicle discharging method according to claim 5, wherein the simulated feedback voltage and current information is a charging state of the charging post, and the simulated feedback voltage and current information corresponds to the required voltage and the required current of the vehicle.

7. The charging pile-based vehicle discharge realization method according to claim 2, characterized by further comprising the following steps:

detecting a circulating current between the charging pile and the vehicle;

and if the circulating current is smaller than a preset threshold value, disconnecting the charging pile from the vehicle.

Technical Field

The invention relates to the technical field of discharge control, in particular to a method for realizing vehicle discharge based on a charging pile.

Background

With the development of electric vehicles, the concept of the V2G charging pile is more and more popular, and the V2G charging pile also focuses more and more on achieving optimization of power scheduling and maximization of benefits. For example, the electric vehicle is driven to participate in power grid electric energy dispatching through a discharging function. However, the way of realizing electric vehicle discharge by the existing V2G charging pile is complex, and is difficult to be widely applied.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. Therefore, the invention aims to provide a method for realizing vehicle discharge based on a charging pile, which can realize vehicle discharge and has the advantages of simplicity and better applicability.

In order to achieve the above object, an embodiment of the present invention provides a method for realizing vehicle discharge based on a charging pile, where a working mode of the charging pile includes a charging mode and a discharging mode, and the method includes the following steps: acquiring a selection instruction of the working mode; if the selection instruction of the discharge mode is obtained, acquiring the required voltage and the required current of the vehicle; outputting a detection current according to the required current to detect whether the connection between the charging pile and the vehicle is completed; if the connection between the charging pile and the vehicle is completed, switching to the discharging mode; simulating feedback voltage and current information according to the demand voltage and the demand current; and maintaining the discharge mode according to the simulated feedback voltage and current information so as to realize the continuous discharge of the vehicle.

According to the method for realizing vehicle discharge based on the charging pile provided by the embodiment of the invention, whether the connection between the charging pile and the vehicle is finished or not is detected by acquiring the required voltage and current of the vehicle and outputting the detection current according to the required current, wherein if the connection between the charging pile and the vehicle is finished, the charging pile is controlled to be converted into a discharge mode, then, feedback voltage and current information is simulated according to the required voltage and current, and the discharge mode is maintained according to the simulated feedback voltage and current information so as to continuously carry out the discharge of the vehicle, so that the vehicle discharge can be realized, and the method is simple and has better applicability.

In addition, the method for realizing vehicle discharge based on the charging pile provided by the embodiment of the invention also has the following additional technical characteristics:

according to one embodiment of the present invention, the step of obtaining the required voltage and the required current of the vehicle further comprises the steps of: acquiring identification information of the vehicle; and identifying the identity of the vehicle according to the identification information, and performing insulation detection and charging preparation after the identity identification is finished.

According to an embodiment of the invention, outputting a detection current according to the required current to detect whether the connection between the charging pile and the vehicle is completed specifically includes the following steps: outputting a detection current according to the demand current; detecting whether the detection current passes through a connecting line between the charging pile and the vehicle; and if the detection current passes through a connecting line between the charging pile and the vehicle, judging that the charging pile and the vehicle are connected.

According to an embodiment of the invention, if the detection current does not pass through the connection line between the charging pile and the vehicle, it is determined that the connection between the charging pile and the vehicle is not completed, and the detection of the connection line between the charging pile and the vehicle is continued.

According to an embodiment of the present invention, maintaining the discharge mode according to the simulated feedback voltage and current information to realize the sustained discharge of the vehicle specifically includes the following steps: sending the simulated feedback voltage and current information to the vehicle to ensure that the vehicle continuously sends the required voltage and current; and maintaining the connection between the charging pile and the vehicle according to the required voltage and current so as to realize the continuous discharge of the vehicle.

According to an embodiment of the present invention, the simulated feedback voltage and current information is a charging state of the charging pile, and the simulated feedback voltage and current information corresponds to the required voltage and the required current of the vehicle.

According to an embodiment of the invention, the method for realizing vehicle discharge based on the charging pile further comprises the following steps: detecting a circulating current between the charging pile and the vehicle; and if the circulating current is smaller than a preset threshold value, disconnecting the charging pile from the vehicle.

Drawings

Fig. 1 is a flowchart of a method for implementing vehicle discharge based on a charging pile according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a charging post and vehicle connection according to one embodiment of the present invention;

fig. 3 is a flowchart of an application of the method for realizing vehicle discharging based on the charging pile in the GB/T27930 protocol according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the charging pile applicable to the method for realizing vehicle discharge based on the charging pile of the present invention needs to have a bidirectional charging and discharging function, that is, the working mode has a charging mode and a discharging mode.

As shown in fig. 1, the method for realizing vehicle discharge based on the charging pile of the embodiment of the invention includes the following steps:

and S1, acquiring a selection instruction of the working mode.

Specifically, the selection instruction of the operation mode may be input by the operator.

And S2, acquiring the required voltage and the required current of the vehicle if the selection command of the discharging mode is obtained.

Specifically, after the selection instruction of the discharging mode is obtained, the required voltage and current of the vehicle can be obtained by receiving the vehicle state and the charging requirement message sent by the vehicle.

And S3, outputting the detection current according to the demand current to detect whether the connection between the charging pile and the vehicle is completed.

Specifically, can be according to demand current output detection current, whether further the detectable fills on the connecting line between electric pile and the vehicle has detection current to pass through, if fill electric pile and have detection current to pass through on the connecting line between the vehicle, then judge to fill and accomplish between electric pile and the vehicle and be connected, judge promptly that to fill the interconnecting link between electric pile and the vehicle is the route.

And S4, if the connection between the charging pile and the vehicle is completed, switching to a discharging mode.

And if the connection between the charging pile and the vehicle is not completed, continuously detecting whether the detection current passes through a connecting line between the charging pile and the vehicle or not until the detection current passes through the connecting line between the charging pile and the vehicle, and controlling the charging pile to convert the detection current into a discharging mode.

And S5, simulating feedback voltage and current information according to the demand voltage and the demand current.

The simulated feedback voltage and current information is the charging state of the charging pile, namely the output voltage and current, and if the charging state of the charging pile, namely the output voltage and current and the required voltage and current sent by the vehicle are inconsistent, the vehicle can stop the discharging mode, so that the vehicle needs to simulate the feedback voltage and current information sending value according to the required voltage and current to maintain the discharging mode.

And S6, maintaining the discharge mode according to the simulated feedback voltage and current information to realize the continuous discharge of the vehicle.

Specifically, the simulated feedback voltage and current information can be sent to the vehicle to ensure that the vehicle continuously sends the required voltage and current, and the connection between the charging pile and the vehicle can be maintained according to the required voltage and current to realize the continuous discharging of the vehicle.

Further, before acquiring the required voltage and the required current of the vehicle, the method further comprises the following steps: acquiring identification information of a vehicle; the vehicle is identified according to the identification information, and insulation detection and charging preparation, such as pre-charging, are performed after the identification is finished.

Further, the following steps are also included after step S5: detecting the circulating current between the charging pile and the vehicle; and if the circulating current is smaller than the preset threshold value, disconnecting the charging pile from the vehicle.

It should be noted that the method for realizing vehicle discharge based on the charging pile of the present invention can be realized based on a set of charging protocols, and the charging protocol itself does not need to be modified, and the application of the method for realizing vehicle discharge based on the charging pile of the present invention in the GB/T27930 protocol will be specifically described below with reference to the charging pile V2G and the vehicle shown in fig. 2.

As shown in fig. 2, the V2G charging post may include a bidirectional power supply module 10, a bidirectional detection module 20, a charging post control module 30, a contactor 40, and a circuit breaker 50. Wherein, fill electric pile control module 30 and link to each other with bidirectional power supply module 10, bidirectional detection module 20 and fill electric pile contactor 40 respectively to be equipped with charge mode and discharge mode in the bidirectional power supply module 10, fill the controllable bidirectional power supply module 10 of electric pile control module 30 and switch over and fill/discharge the mode, and the steerable shutoff that fills electric pile contactor 40.

As shown in fig. 2, the vehicle may include a battery pack 60, a battery management module 70, and vehicle contactors 80. Where battery management module 70 is coupled to battery pack 60 and vehicle contactor 80, respectively, battery management module 70 may be used to control the turning off of vehicle contactor 80.

Further, as shown in fig. 3, after the charging gun of the V2G charging post is inserted into the vehicle and the discharging mode is selected, the V2G charging post starts exchanging handshake messages with the vehicle, that is, the V2G charging post sends a CHM message to the vehicle, and the vehicle sends a BHM message to the V2G charging post.

Further, as shown in fig. 3, after the handshake messages are exchanged for identification, the V2G charging post may perform insulation detection, and after the insulation detection is passed, the V2G charging post may send messages from CRM to BRO to each other with the vehicle. Wherein, after the vehicle sends BRO 0x00, i.e. the vehicle battery pack starts charging preparation message, to the V2G charging post, and after the vehicle sends BRO 0x00, i.e. the vehicle battery pack starts charging preparation message, the vehicle contactor 80, i.e. contactor K5/K6, may be controlled to close, and then BRO 0xAA, i.e. the vehicle battery pack charging preparation message, may be sent to the V2G charging post.

Further, as shown in fig. 3, after receiving the BRO-0 xAA, i.e., the vehicle battery pack charging ready message, the V2G charging post starts to send CRO-0 x00 to the vehicle, namely, the V2G charging pile outputs a start preparation message, and starts the precharging, and controls the charging pile contactor 40 after the precharging is finished, i.e., contactor K1/K2, is closed, and after the charging post contactor 40, i.e., contactor K1/K2, is closed, the V2G charging post may send CRO 0xAA to the vehicle, namely, the V2G charging pile outputs a ready message, and then the vehicle sends BCL to the V2G charging pile, i.e., vehicle battery pack charging demand messages and BCSs, i.e., vehicle battery pack state of charge messages, to communicate the status and charging demand of the vehicle to the V2G charging post, and the vehicle may send CCS to the V2G charging post, namely, the charging state message of the charging pile of the V2G, so as to transmit the state of the charging pile of the V2G and the current charging voltage and current to the vehicle.

Further, as shown in fig. 3, after the V2G charging pile receives the BCL, i.e., the vehicle battery pack charging demand message and the BCS, i.e., the vehicle battery pack charging status message, it may output according to the vehicle demand voltage, and may generate a detection current according to the vehicle demand current, for example, the detection current 3A may be set according to the vehicle demand current, and the bidirectional detection module 20 may detect whether the detection current passes through the connection line between the V2G charging pile and the vehicle, so as to determine whether the vehicle contactor 80, i.e., the contactor K5/K6, is closed. If the detection V2G detects that no current passes through the connecting line between the charging pile and the vehicle, namely the contactor K5/K6 is not closed, whether a detection current passes through the connecting line between the charging pile and the vehicle of the V2G is continued, and if the detection current passes through the connecting line between the charging pile and the vehicle of the V2G, namely the contactor K5/K6 is closed, the bidirectional power supply module 10 is switched to a discharging mode. It should be noted that after the BRO ═ 0xAA message is sent, the vehicle does not immediately control the contactor K5/K6 to close, and if the vehicle switches to the discharge mode at this time, the voltage difference between the vehicle contactor 80, i.e., the front and rear stages of the contactor K5/K6, may not match, which may cause a certain risk.

Further, as shown in fig. 3, after the bidirectional power module 10 is switched to the discharging mode, the voltage on the main circuit is the voltage of the vehicle battery pack 60, and the bidirectional power module 10 may invert the voltage of the vehicle battery pack 60 into three-phase power and send the three-phase power back to the power grid 100. At this time, the voltage and the current detected by the bidirectional detection module 20 are respectively the voltage and the discharge current of the vehicle battery pack 60, and if the voltage and the current are returned to the battery management module 70 as feedback parameters, the battery management module 70 stops sending BCL, i.e., a battery pack charging demand message and BCS, i.e., a battery pack charging state message, to the V2G charging pile, so that the required voltage and the current of the vehicle extracted from BCL, i.e., the battery pack charging demand message and BCS, i.e., the battery pack charging state message, can be filled in a CCS, i.e., a V2G charging pile charging state message, as the voltage and the current sent by the current V2G charging pile, so as to ensure that the vehicle continuously sends BCL, i.e., the battery pack charging demand message and BCS, i.e., the battery pack charging state message to the.

Further, as shown in fig. 3, after the vehicle discharge is finished, the vehicle and the V2G charging pile may send BST/CST, i.e., a shutdown message, and BSD/CSD, i.e., a handshake interaction message, to each other, and start to reduce the current flowing therebetween, and when it is detected that the current flowing between the V2G charging pile and the vehicle is less than a preset threshold, e.g., 5A, the charging pile contactor 40, i.e., the contactor K1/K2, and the vehicle contactor 80, i.e., the contactor K5/K6, may be opened, and the discharge process is finished.

It should be noted that the GB/T27930 protocol is not destroyed by the above discharging method, and only some fields in the V2G charging stub message are modified, so the discharging method has better applicability.

Of course, the modified GB/T27930 protocol can still perform the charging operation. Specifically, as shown in fig. 3, after the charging gun of the V2G charging post is inserted into the vehicle and the discharging mode is selected, the V2G charging post starts exchanging handshake messages with the vehicle, that is, the V2G charging post sends a CHM message to the vehicle, and the vehicle sends a BHM message to the V2G charging post.

Further, as shown in fig. 3, after the handshake messages are exchanged for identification, the V2G charging post may perform insulation detection, and after the insulation detection is passed, the V2G charging post may send messages from CRM to BRO to each other with the vehicle. Wherein, after the vehicle sends BRO 0x00, i.e. the vehicle battery pack starts charging preparation message, to the V2G charging post, and after the vehicle sends BRO 0x00, i.e. the vehicle battery pack starts charging preparation message, the vehicle contactor 80, i.e. contactor K5/K6, may be controlled to close, and then BRO 0xAA, i.e. the vehicle battery pack charging preparation message, may be sent to the V2G charging post.

Further, as shown in fig. 3, after receiving the BRO-0 xAA, i.e., the vehicle battery pack charging ready message, the V2G charging post starts to send CRO-0 x00 to the vehicle, namely, the V2G charging pile outputs a start preparation message, and starts the precharging, and controls the charging pile contactor 40 after the precharging is finished, i.e., contactor K1/K2, is closed, and after the charging post contactor 40, i.e., contactor K1/K2, is closed, the V2G charging post may send CRO 0xAA to the vehicle, namely, the V2G charging pile outputs a ready message, and then the vehicle sends BCL to the V2G charging pile, i.e., vehicle battery pack charging demand messages and BCSs, i.e., vehicle battery pack state of charge messages, to communicate the status and charging demand of the vehicle to the V2G charging post, and the vehicle may send CCS to the V2G charging post, namely, the charging state message of the charging pile of the V2G, so as to transmit the state of the charging pile of the V2G and the current charging voltage and current to the vehicle. At this moment, the charging pile can be always maintained in a charging mode to realize continuous charging of the vehicle, and after the vehicle finishes charging, the ending process of the charging pile can refer to the ending process of the discharging mode, and repeated description is not repeated here.

According to the method for realizing vehicle discharge based on the charging pile provided by the embodiment of the invention, whether the connection between the charging pile and the vehicle is finished or not is detected by acquiring the required voltage and current of the vehicle and outputting the detection current according to the required current, wherein if the connection between the charging pile and the vehicle is finished, the charging pile is controlled to be converted into a discharge mode, then, feedback voltage and current information is simulated according to the required voltage and current, and the discharge mode is maintained according to the simulated feedback voltage and current information so as to continuously carry out the discharge of the vehicle, so that the vehicle discharge can be realized, and the method is simple and has better applicability.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.