WO2022246831A1

WO2022246831A1 - Vehicle charging control method, and device and computer-readable storage medium

Info

Publication number: WO2022246831A1
Application number: PCT/CN2021/096919
Authority: WO
Inventors: 蒋观峰; 隋涛
Original assignee: 宁波吉利汽车研究开发有限公司; 浙江吉利控股集团有限公司
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-12-01
Also published as: CN117337526A

Abstract

Disclosed in the present invention are a vehicle charging control method, and a device and a computer-readable storage medium. The vehicle charging control method comprises: after a charging configuration message is sent to a charger, acquiring an actual output voltage value that is fed back by the charger according to the charging configuration message; and when the actual output voltage value does not reach a preset desired output voltage value, sending, to the charger, a low-voltage pre-charging request signal with respect to a high-voltage pre-charging request signal. By means of the present invention, the technical problem of a charging halt or error caused by an output voltage of a charger being unable to meet the requirements of a vehicle is solved.

Description

Vehicle charging control method, device, and computer-readable storage medium

technical field

The present invention relates to the field of vehicle technology, in particular to a vehicle charging control method, device and computer-readable storage medium.

Background technique

In order to reduce the power loss of electric vehicle cables and reduce the weight of the cable itself, the charging application of high-voltage platform systems, such as 800V high-voltage platform systems, is gradually increasing. Compared with the traditional low-voltage platform system, the current of the high-voltage platform system under the same power is smaller, so that the heat loss is smaller, and the cable is thinner and lighter. However, during the gradual promotion of high-voltage platform systems, charging piles suitable for low-voltage platform systems are still in use in the market, especially in Europe and the United States where DIN SPEC 70121 and ISO 15118 are DC charging standards. The output voltage capability of the charger cannot meet the requirements of the vehicle, which will cause the charging to stop or an error to be reported.

technical problem

Solve the technical problem of charging stop or error reporting caused by the output voltage of the charger not meeting the requirements of the vehicle.

technical solution

In order to achieve the above object, the present invention provides a charging control method for a vehicle, the vehicle includes a high-voltage platform; the charging control method for the vehicle includes the following steps:

After sending the charging configuration message to the charger, obtain the actual output voltage value fed back by the charger according to the charging configuration message;

When the actual output voltage value does not reach the preset expected output voltage value, a low-voltage pre-charging request signal relative to the high voltage is sent to the charger.

Optionally, after the step of obtaining the actual output voltage value fed back by the charger according to the charging configuration message, it may further include:

When the actual output voltage value reaches a preset expected output voltage value, a high voltage precharge request signal is sent to the charger.

Optionally, the step of obtaining the actual output voltage value fed back by the charger according to the charging configuration message includes:

receiving a charging configuration response message fed back by the charger according to the charging configuration message, the charging configuration response message including the actual output voltage value of the charger.

Optionally, the step of sending a charging configuration message to the charger includes:

Sending a charging configuration message including the preset expected output voltage value to the charger.

Optionally, the vehicle includes a voltage conversion device; after the step of sending a low-voltage pre-charging request signal relative to the high voltage to the charger, it further includes:

When receiving the pre-charge response signal fed back by the charger according to the low-voltage pre-charge request signal, the voltage conversion device is operated, and the electric energy output by the charger is input to the high voltage through the voltage conversion device. platform.

Optionally, the step of operating the voltage conversion device includes:

controlling the voltage conversion device to adjust the adaptation voltage of the high voltage platform to the actual output voltage value.

In order to achieve the above object, the present invention also provides a vehicle including a high-voltage platform, and the charging control method of the vehicle includes the following steps:

After receiving the charging configuration message sent by the vehicle, feed back the actual output voltage value to the vehicle according to the charging configuration message;

receiving a low-voltage pre-charging request signal relative to the high voltage sent by the vehicle when it is determined that the actual output voltage value has not reached a preset expected output voltage value, so as to perform pre-charging according to the low-voltage pre-charging request signal.

Optionally, after the step of feeding back the actual output voltage value to the vehicle according to the charging configuration message, further comprising:

receiving a high-voltage pre-charging request signal sent by the vehicle when it is determined that the actual output voltage value reaches a preset expected output voltage value, so as to perform pre-charging according to the high-voltage pre-charging request signal.

To achieve the above object, the present invention also provides a charging control device for a vehicle, which includes: a memory, a processor, and a vehicle charging device stored in the memory and operable on the processor. A control program, when the vehicle charging control program is executed by the processor, implements the steps of the vehicle charging control method as described above.

In order to achieve the above object, the present invention also provides a computer-readable storage medium, the computer-readable storage medium stores the charging control program of the vehicle, and when the charging control program of the vehicle is executed by the processor, the above-mentioned Steps of a charging control method for a vehicle.

Beneficial effect

In the vehicle charging control method, equipment and computer-readable storage medium provided by the present invention, after the vehicle sends a charging configuration message to the charger, the actual output voltage value fed back by the charger according to the charging configuration message is obtained; When the actual output voltage value does not reach the preset expected output voltage value, a low-voltage pre-charging request signal corresponding to the high voltage is sent to the charger for the charger to perform pre-charging according to the low-voltage pre-charging request signal. In the process of communication configuration, the comparison process between the actual output voltage value of the charger and the preset expected output voltage value of the vehicle is added, and when it is confirmed that the charger is not enough to supply power according to the expected voltage value, the low-voltage pre-charge request signal is used as the detection signal Feedback pre-charging request to pre-charge the charger, in line with the charging protocol of the European and American markets, pre-charging according to the low-voltage pre-charging request can make the vehicle with a high-voltage platform compatible with the low-voltage charger, that is, it will not cause charging to stop or error, Solved the technical problem of charging stop or error reporting caused by the output voltage of the charger not meeting the requirements of the vehicle.

Description of drawings

Fig. 1 is a schematic diagram of the terminal/device structure of the hardware operating environment involved in the solution of the embodiment of the present invention;

FIG. 2 is a schematic flowchart of an embodiment of the vehicle charging control method of the present invention applied to a vehicle;

FIG. 3 is a schematic flowchart of an embodiment of the vehicle charging control method of the present invention applied to a charger;

FIG. 4 is a schematic flowchart of another embodiment of the vehicle charging control method of the present invention applied to a vehicle;

FIG. 5 is a schematic flowchart of another embodiment of the vehicle charging control method of the present invention applied to a charger.

The realization of the purpose, function and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Embodiments of the present invention

It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in FIG. 1 , FIG. 1 is a schematic diagram of a terminal structure of a hardware operating environment involved in the solution of the embodiment of the present invention.

The terminal of the embodiment of the present invention is the charging control device of the vehicle. The charging control device of the vehicle may be the vehicle itself or its controller. The vehicle may be, for example, an electric vehicle or a hybrid vehicle, or a charger for charging the vehicle.

As shown in FIG. 1 , the terminal may include: a processor 1001 , such as a CPU, a network interface 1004 , a user interface 1003 , a memory 1005 , and a communication bus 1002 . Wherein, the communication bus 1002 is used to realize connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. Optionally, the network interface 1004 may include a standard wired interface and a wireless interface (such as a WI-FI interface). The memory 1005 may be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001 .

Optionally, the terminal can also include RF (Radio Frequency, radio frequency) circuits, sensors, charging circuits, communication modules, etc. Among them, sensors such as light sensors, motion sensors, temperature sensors, and other sensors. Specifically, the temperature sensor can report component temperature fault information to the master control when the monitored component temperature reaches a limit value. Of course, the terminal device can also be configured with a vehicle driving system, a braking system, etc., which will not be repeated here.

Those skilled in the art can understand that the terminal structure shown in FIG. 1 does not constitute a limitation on the terminal, and may include more or less components than those shown in the figure, or combine some components, or arrange different components.

As shown in FIG. 1 , the memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module, and a vehicle charging control program.

In the terminal shown in Figure 1, the network interface 1004 is mainly used to connect to the background server and perform data communication with the background server; the user interface 1003 is mainly used to connect to an external terminal (client) and perform data communication with the client; and the processor 1001 can be used to call the charging control program of the vehicle stored in the memory 1005, and perform the following operations:

Further, the processor 1001 can be used to call the charging control program of the vehicle stored in the memory 1005, and also perform the following operations:

or,

The processor 1001 can be used to call the charging control program of the vehicle stored in the memory 1005, and perform the following operations:

The present invention provides a charging control method for a vehicle. Referring to FIG. 2 , in an embodiment of the charging control method for a vehicle, the method is applied to a vehicle and includes the following steps:

Step S110, after sending a charging configuration message to the charger, obtain the actual output voltage value fed back by the charger according to the charging configuration message;

Step S120, when the actual output voltage value does not reach the preset expected output voltage value, sending a low-voltage pre-charging request signal relative to the high voltage to the charger.

Please also refer to Fig. 3, in this embodiment, when its method is applied to charger, comprise the following steps:

Step S210, after receiving the charging configuration message sent by the vehicle, feeding back the actual output voltage value to the vehicle according to the charging configuration message;

Step S220, receiving a low-voltage pre-charging request signal relative to the high voltage sent by the vehicle when it is determined that the actual output voltage value has not reached a preset expected output voltage value, so as to perform pre-charging according to the low-voltage pre-charging request signal.

It should be noted that in the current European and American DC charging standards DIN SPEC 70121 and ISO 15118, the charging process can be roughly divided into Hand Shaking (information handshake stage), Charge Preparation (charging preparation stage) and Energy Transfer (charging stage) three stages. Among them, in the information handshake stage, the charger (or charging pile) will send its maximum output voltage capability to the vehicle. If the maximum output voltage capability of the charger cannot meet the requirements of the vehicle, charging will stop or an error will be reported. Therefore, the vehicle cannot get timely power supply, causing troubles to the charging and use of the vehicle.

In order to solve this problem, the vehicle in this solution starts the charging information handshake, that is, sends a Charge Parameter Discovery Req (charging configuration message) to the charger. After receiving the charging configuration message, the charger will Return the actual output voltage value of the charger to the vehicle. The actual output voltage value reflects the maximum output capability of the charger, which can be the highest actual output voltage or the voltage operating range. For example, the voltage operating range of charger A is [0 , 400], unit V.

Optionally, it may be to receive the Charge Parameter Discovery Res (charging configuration response message) returned by the charger. The charging configuration response message is a response to the handshake request made by the charger, which may include the actual output voltage of the charger. This realizes the handshake between the vehicle and the charger.

When the vehicle receives the charging configuration response message or the actual output voltage value, it will suspend entering the charging preparation stage at this time, and the vehicle will compare the preset expected output voltage value with the obtained actual output voltage value to confirm the actual voltage output capability of the charger. Whether it meets the requirements of the vehicle. It is understandable that the vehicle includes a high-voltage platform, and the actual matching charger should also have a high-voltage platform to output normally. Therefore, when the actual output voltage value can reach the preset expected output voltage value of the vehicle, it is considered that the voltage platform of the charger meets the requirements of the vehicle voltage platform; when the actual output voltage value cannot reach the preset expected output voltage value, the voltage platform of the charger is considered to be The platform does not meet the vehicle voltage platform requirements. When the voltage platform of the charger does not meet the requirements of the vehicle voltage platform, by adding an information frame to reduce the voltage parameters supported by the voltage platform, it is equivalent to changing the voltage platform of the vehicle and selecting a relatively high-voltage low-voltage pre-charge request signal to feed back to the charger to enter Charging preparation stage.

It should be noted that sending a low-voltage pre-charging request signal from the vehicle to the charger is equivalent to selecting the low-voltage platform as the charging platform for the vehicle. In fact, when the vehicle cable cannot be changed, it can be replaced by setting a hardware circuit or adding a voltage conversion device. . Under the premise of meeting the existing DC charging standards in European and American markets, this solution only needs to modify an information frame in the original communication process, and the delay of data transmission at the user level is short, which is basically undetectable, and realizes vehicle self-adaptive charging. The actual output voltage value/voltage output capability supported by the machine can smoothly enter the charging preparation stage, which solves the technical problem of charging stop or error reporting caused by incompatibility when the charging platform shakes hands. The recognition rate is high, and no manual confirmation and Participation, high degree of automation. Compared with the solution involving the use of the vehicle center console or buttons for confirmation, no hardware modification is involved, which saves costs.

Further, in other embodiments, when the vehicle sends a charging configuration message to initiate charging information handshaking, it may send a charging configuration message including a preset expected output voltage value to the charger. It can be understood that when the vehicle starts the information handshake, the low-voltage conversion is not enabled, and the vehicle only exists or only uses the high-voltage platform by default. At this time, the high-voltage platform sends the corresponding preset expected output voltage value to the charger, thereby triggering charging. Information handshaking is simple and convenient because it does not require voltage switching, and it has limited use for preset expected output voltage values.

Further, referring to FIG. 4 , in another embodiment of the vehicle charging control method of the present invention, after step S110 , further includes:

Step S130, when the actual output voltage value reaches the preset expected output voltage value, sending a high-voltage pre-charging request signal to the charger.

Referring to FIG. 5, when the method is applicable to a charger, after step S210, it also includes:

Step S230, receiving a high-voltage pre-charging request signal sent by the vehicle when it is determined that the actual output voltage value reaches a preset expected output voltage value, so as to perform pre-charging according to the high-voltage pre-charging request signal.

In this embodiment, when the voltage platform of the charger is considered to meet the requirements of the vehicle voltage platform, the high voltage parameters corresponding to the high voltage platform are continued to be used for precharging and charging. The vehicle high-voltage platform supports 800V, and the charger includes a 400V voltage platform and an 800V voltage platform as an example. If the preset expected output voltage value in the charging configuration message sent by the vehicle is 800V, and the actual output voltage value of the charging pile is 400V, it means that the output capability of the charger and the voltage platform support parameters are 400V, and then the vehicle will not be affected by the charger. Insufficient voltage alarm or quit charging, but according to the vehicle’s 400V voltage platform which is lower than 800V, send a low-voltage pre-charge request signal corresponding to 400V to the charger to start pre-charging, and then complete the voltage platform switching and charging. When the actual output voltage value of the charging pile is 800V, it means that the output capability of the charger and the voltage platform support parameters are 800V, and the voltage platform of the vehicle and the charger matches, and high-voltage pre-charging and charging can be performed directly according to the high-voltage parameters supported by the high-voltage platform .

It should also be noted that the above-mentioned high voltage and low voltage are relative concepts, and 400V and 800V are just examples. There is a certain multiple relationship between the actual high voltage and low voltage, and both can support vehicle charging. This scheme realizes the technical scheme that the vehicle on the high-voltage platform automatically recognizes the voltage output capability of the charger without the need for personnel to intervene in the selection, so that the vehicle on the high-voltage platform is compatible with the chargers with low-voltage output and high-voltage output. The stage has played a technical buffer role, improving the adaptability of the vehicle, saving equipment costs, and improving the utilization rate of the charger.

Furthermore, in yet another embodiment, the vehicle also includes a voltage conversion device, which can be arranged between the high-voltage platform of the vehicle and the charging interface, and when the voltage conversion device is running, the electric energy output by the charger passes through the charging interface 1. The voltage conversion device is input to the high-voltage platform of the vehicle; when the voltage conversion device is not running, the electric energy output by the charger is directly input to the high-voltage platform of the vehicle through the charging interface. Optionally, when the charging conversion device participates in realizing the charging control of the vehicle, after step S120, the following steps are provided:

Step S140, when receiving the pre-charge response signal fed back by the charger according to the low-voltage pre-charge request signal, run the voltage conversion device, and input the electric energy output by the charger to the The high voltage platform.

In the communication process between the charger and the vehicle, in order to achieve the final charging purpose, the charging preparation stage and the charging stage need to be completed according to the standard. In the charging preparation stage, the vehicle has sent a low-voltage Pre Charge Req (pre-charge request signal) to the charger. , the low-voltage pre-charge request signal is actually a low-voltage detection signal, which makes the vehicle ignore the high-voltage platform it supports and includes, and is used to request the charging pile to use low voltage as the standard to complete the charging of the target, and the corresponding charger confirms this low-voltage detection After the signal, it is necessary to feed back the pre-charging confirmation information, that is, the pre-charging response signal to the vehicle. Since then, it has been confirmed that the configuration process of low-voltage charging has been completed. In the charging stage, the charger will output low-voltage electric energy to the vehicle through the charging gun, and the voltage conversion device of the vehicle will be activated. The adaptation voltage of the high-voltage platform is adjusted to the actual output voltage value. From then on, the pre-charging preparation stage of the vehicle is completed and enters the charging stage, and subsequent charging is carried out according to the standard protocol. It should be noted that when the charger also supports the high-voltage platform, the voltage conversion device does not need to be activated, and the configuration and pre-charge preparation can be carried out according to the normal situation with reference to the low-voltage charging process. On the basis of changing a communication frame, combined with the use of the voltage conversion device, the present invention realizes the charging of the vehicle, enables the vehicle to switch the use of the voltage conversion device according to the voltage output capability of the charger itself, and the automatic vehicle enters the low-voltage/high-voltage charging mode , with a high degree of adaptation.

In addition, an embodiment of the present invention also proposes a computer-readable storage medium on which is stored

machine program. The computer-readable storage medium can be a memory in a controller, or can be a memory such as a ROM

At least one of (Read-OnlyMemory, read-only memory)/RAM (RandomAccessMemory, random access memory), magnetic disk, and optical disk, the computer-readable storage medium includes several instructions to make a terminal with a processor A device (which may be a vehicle, a charger, a computer, a server, or a network device, etc.) executes the methods described in various embodiments of the present invention.

The specific implementation manners of the computer-readable storage medium of the present invention are basically the same as the above-mentioned embodiments of the vehicle charging control method, and will not be repeated here.

It should be noted that, as used herein, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or system comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or system. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article or system comprising that element.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the technical solution of the present invention can be embodied in the form of a software product in essence or the part that contributes to the prior art, and the computer software product is stored in a storage medium (such as ROM/RAM) , magnetic disk, optical disk), including several instructions to make a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) execute the method described in each embodiment of the present invention.

The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields , are all included in the scope of patent protection of the present invention in the same way.

Claims

A charging control method for a vehicle, characterized in that the vehicle includes a high-voltage platform; the charging control method for the vehicle includes the following steps:

After sending the charging configuration message to the charger, obtain the actual output voltage value fed back by the charger according to the charging configuration message;

When the actual output voltage value does not reach the preset expected output voltage value, a low-voltage pre-charging request signal relative to the high voltage is sent to the charger.
The charging control method of a vehicle according to claim 1, characterized in that after the step of obtaining the actual output voltage value fed back by the charger according to the charging configuration message, further comprising:

When the actual output voltage value reaches a preset expected output voltage value, a high voltage precharge request signal is sent to the charger.
The charging control method of a vehicle according to claim 1, wherein the step of obtaining the actual output voltage value fed back by the charger according to the charging configuration message comprises:

receiving a charging configuration response message fed back by the charger according to the charging configuration message, the charging configuration response message including the actual output voltage value of the charger.
The charging control method of a vehicle according to claim 1, wherein the step of sending a charging configuration message to the charger comprises:

Sending a charging configuration message including the preset expected output voltage value to the charger.
The charging control method for a vehicle according to any one of claims 1 to 4, wherein the vehicle includes a voltage conversion device; After the steps, also include:

When receiving the pre-charge response signal fed back by the charger according to the low-voltage pre-charge request signal, the voltage conversion device is operated, and the electric energy output by the charger is input to the high voltage through the voltage conversion device. platform.
The charging control method for a vehicle according to claim 5, wherein the step of operating the voltage converting device comprises:

controlling the voltage conversion device to adjust the adaptation voltage of the high voltage platform to the actual output voltage value.
A charging control method for a vehicle, characterized in that the vehicle includes a high-voltage platform, and the charging control method for the vehicle includes the following steps:

After receiving the charging configuration message sent by the vehicle, feed back the actual output voltage value to the vehicle according to the charging configuration message;

receiving a low-voltage pre-charging request signal relative to the high voltage sent by the vehicle when it is determined that the actual output voltage value has not reached a preset expected output voltage value, so as to perform pre-charging according to the low-voltage pre-charging request signal.
The charging control method of a vehicle according to claim 7, characterized in that, after the step of feeding back the actual output voltage value to the vehicle according to the charging configuration message, further comprising:

receiving a high-voltage pre-charging request signal sent by the vehicle when it is determined that the actual output voltage value reaches a preset expected output voltage value, so as to perform pre-charging according to the high-voltage pre-charging request signal.
A charging control device for a vehicle, characterized in that the charging control device for the vehicle includes: a memory, a processor, and a vehicle charging control program stored in the memory and operable on the processor, the When the vehicle charging control program is executed by the processor, the steps of the vehicle charging control method according to any one of claims 1 to 8 are realized.
A computer-readable storage medium, characterized in that a vehicle charging control program is stored on the computer-readable storage medium, and when the vehicle charging control program is executed by a processor, any one of claims 1 to 8 can be realized. The steps of the vehicle charging control method described in the item.