CN116353408A

CN116353408A - Heavy-duty card power conversion method and device, electronic equipment and storage medium

Info

Publication number: CN116353408A
Application number: CN202310459341.4A
Authority: CN
Inventors: 王振培; 吴栋林; 闫立; 马勃; 杨洋; 郭鹏
Original assignee: Shanghai Qiyuan Core Power Technology Co ltd
Current assignee: Shanghai Qiyuan Core Power Technology Co ltd
Priority date: 2022-06-30
Filing date: 2023-04-26
Publication date: 2023-06-30

Abstract

The application provides a method, equipment and a storage medium for replacing a heavy truck, wherein the method establishes communication connection with a vehicle; acquiring vehicle information through communication connection; and according to the vehicle information, the vehicle is subjected to power conversion. According to the method and the device, the communication connection is established with the vehicle, the vehicle information is acquired, and then the vehicle is subjected to power conversion, so that accurate automatic power conversion is realized.

Description

Heavy-duty card power conversion method and device, electronic equipment and storage medium

Technical Field

The present disclosure relates to the field of power conversion of heavy cards, and in particular, to a method and an apparatus for power conversion of heavy cards, an electronic device, and a storage medium.

Background

With the improvement of environmental awareness, new energy vehicles are attracting more attention, and for heavy truck, the carbon emission can be greatly reduced by using the electric heavy truck, so that the environment is protected. The power change method adopted by the electric heavy truck is important.

Disclosure of Invention

In order to solve one of the technical defects, the application provides a heavy-duty card power-changing method, equipment and a storage medium.

In a first aspect of the present application, a method for changing power of a heavy card is provided, the method including:

establishing a communication connection with the vehicle;

Acquiring vehicle information through the communication connection;

and according to the vehicle information, carrying out power conversion on the vehicle.

Optionally, the establishing a communication connection with the vehicle includes:

and establishing communication connection with the vehicle through a WIFI communication mode.

Optionally, the step of replacing the power of the vehicle according to the vehicle information includes:

acquiring an identification of the vehicle;

confirming the identity of the vehicle according to the identification and the vehicle information;

and after the success is confirmed, the vehicle is subjected to power conversion.

Optionally, the acquiring the identification of the vehicle includes:

and acquiring the identification of the vehicle through a code scanning vehicle number plate or through a radio frequency identification technology.

Optionally, the step of changing the power of the vehicle includes:

establishing a power exchange connection with a vehicle through Bluetooth;

transmitting a power change stop position and a power change station position mark to the vehicle based on the power change connection so that the vehicle stops to the power change position according to the power change stop position and the power change station position mark;

in the process of carrying out power conversion on the vehicle, receiving power conversion data of the vehicle based on the power conversion connection;

and confirming that the power change is completed according to the power change data.

Optionally, after the completion of the power change is confirmed according to the power change data, the method further includes:

issuing a power change record query request message to the vehicle based on the power change connection; the electricity change record inquiry request message comprises an inquiry key value and first signature data; the first signature data is obtained by encrypting the abstract of the query key value through a private key;

receiving a power change record inquiry response message reported by the vehicle based on the power change connection, wherein the power change record inquiry response message comprises a power change record;

and carrying out validity check on the electricity change record inquiry response message, and generating a bill after the check is successful.

Optionally, the electricity change record inquiry response message is reported when the first information is the same as the second information;

the first information is a summary of the obtained inquiry key value, wherein the vehicle decrypts the first signature data through a public key; and the second information calculates the abstract of the inquiry key value for the vehicle.

Optionally, after the communication connection is established with the vehicle through the WIFI communication manner, the method further includes:

determining the position of the vehicle in real time;

and when the vehicle position meets a preset relation, disconnecting the WIFI connection.

In a second aspect of the present application, there is provided an electronic device, including:

a memory;

a processor; and

a computer program;

wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method as described in the first aspect above.

In a third aspect of the present application, there is provided a computer-readable storage medium having a computer program stored thereon; the computer program is executed by a processor to implement the method as described in the first aspect above.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

fig. 1 is a schematic flow chart of a method for replacing a heavy card according to an embodiment of the present application;

Fig. 2 is a schematic view of a scenario of a power changing method for a heavy truck according to an embodiment of the present application;

FIG. 3 is a flowchart of a power conversion searching method provided by an embodiment of the invention;

FIG. 4 is a flowchart of a power conversion searching method provided by an embodiment of the invention;

FIG. 5 is a schematic diagram of two ways of converting a circle into a polygon according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a power conversion search system provided by an embodiment of the present invention;

fig. 7 is a flowchart of a power conversion authentication method provided by the invention;

FIG. 8 is a detailed flowchart of a power-change authentication method provided by the invention;

FIG. 9 is a flow chart of a method for protecting safety in a power conversion process provided by the invention;

FIG. 10 is a flow chart of a safe power change process provided by the invention;

fig. 11 is a specific flowchart of a method for protecting safety in a power conversion process according to the present invention.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following detailed description of exemplary embodiments of the present application is given with reference to the accompanying drawings, and it is apparent that the described embodiments are only some of the embodiments of the present application and not exhaustive of all the embodiments. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.

In the process of realizing the application, the inventor finds that along with the improvement of environmental awareness of people, new energy vehicles are more and more concerned, and for heavy trucks, the carbon emission can be greatly reduced by using the electric heavy truck, so that the environment is protected. The power change method adopted by the electric heavy truck is important.

Aiming at the problems, the embodiment of the application provides a method, equipment and a storage medium for replacing the heavy truck, wherein the method establishes communication connection with a vehicle; acquiring vehicle information through communication connection; and according to the vehicle information, the vehicle is subjected to power conversion. According to the method and the device, the communication connection is established with the vehicle, the vehicle information is acquired, and then the vehicle is subjected to power conversion, so that accurate automatic power conversion is realized.

Referring to fig. 1, the implementation process of the method for replacing the power of the heavy truck provided by the embodiment is as follows:

101, establishing a communication connection with the vehicle.

For example, a communication connection is established with the vehicle through a WIFI communication mode.

In addition, after communication connection is established with the vehicle through the WIFI communication mode, the position of the vehicle can be determined in real time. And when the vehicle position meets a preset relation (for example, the vehicle leaves the effective distance of the WIFI), disconnecting the WIFI connection.

102, acquiring vehicle information through a communication connection.

For example, obtaining license plates, RFID (Radio Frequency Identification, radio frequency identification technology) identification, etc.

103, according to the vehicle information, the vehicle is subjected to power conversion.

The method can be realized by the following steps:

1. an identification of the vehicle is obtained.

For example, the identification of the vehicle is obtained by scanning a code vehicle number plate, or by RFID.

2. And confirming the identity of the vehicle according to the identification and the vehicle information.

3. And after the success is confirmed, the vehicle is subjected to power change.

For example, the number of the cells to be processed,

1) And establishing a power exchange connection with the vehicle through Bluetooth.

2) And sending a power change stop position and a power change station position mark to the vehicle based on the power change connection so that the vehicle stops to the power change position according to the power change stop position and the power change station position mark.

3) And in the process of changing the power of the vehicle, receiving the power changing data of the vehicle based on the power changing connection.

4) And confirming that the power change is completed according to the power change data.

According to the method provided by the embodiment, the vehicle information is acquired by establishing communication connection with the vehicle, so that the vehicle is subjected to power conversion, and accurate automatic power conversion is realized.

The method provided in this embodiment will be schematically described again by taking the scenario shown in fig. 2 as an example:

when the vehicle enters the power exchange station, identity recognition is carried out in the power exchange station through a code scanning vehicle license plate number or RFID on the vehicle, connection confirmation of the vehicle is carried out after the vehicle is confirmed, power exchange is carried out after the station control system takes the vehicle ready for the power exchange information, and after the power exchange station takes the power exchange completion information, the vehicle leaves the power exchange station to disconnect WIFI connection.

When the vehicle is powered on, the vehicle enters the power exchange station according to the guidance prompt, automatic connection establishment between the power exchange stations is carried out through a classical Bluetooth mode (HID), one-to-one connection is established (signal quality is calibrated according to the position of stopping the power exchange of the vehicle and the position mark of the power exchange station), then power exchange data uploading and action confirmation of a power exchange flow are carried out, and the power exchange flow is completed.

However, the method has a severe parking position requirement on the heavy truck, the parking position error is within 10cm to adapt to external license plate recognition, the high-precision requirement on the battery position of the RFID recognition and power exchange station frame loader is met, and many old drivers need to park the truck to an accurate position for many times, so that a large amount of power exchange time is wasted.

Therefore, the present embodiment adopts an Ultra Wide Band (UWB) accurate positioning scheme to perform automatic positioning for power conversion. After the vehicle enters a power conversion area, UWB labels at the head and tail of the vehicle are connected with four base stations on a station, the base stations can accurately calculate the position of the vehicle, and the station control system is used for commanding the automatic driving of the vehicle to travel to a formulated position and then automatically converting power. After the power is replaced, the vehicle is guided to leave the power replacing station through the whole set of UWB positioning system.

In addition, after confirming the completion of the power change according to the power change data, the following steps are also performed:

and 201, issuing a power change record query request message to the vehicle based on the power change connection.

The power change record query request message comprises a query key value and first signature data.

The first signature data is obtained by encrypting the abstract of the query key value through a private key.

202, receiving a power change record query response message reported by the vehicle based on the power change connection.

The power change record inquiry response message comprises a power change record.

The electricity change record inquiry response message is reported when the first information is the same as the second information.

The first information is a summary of the query key value obtained by decrypting the first signature data by the vehicle through the public key. The second information calculates a summary of the query key values for the vehicle.

And 203, carrying out validity check on the electricity change record inquiry response message, and generating a bill after the check is successful.

For example, the number of the cells to be processed,

1) When the battery lock-up is detected by the battery change vehicle, a battery change record (transfer action) is recorded and stored locally on the vehicle. The TRANSACTION includes: session ID of the present communication process, unique identification number SPIN (Service Provider Identification Number) of the service provider of the power exchange, power exchange station number, power exchange time, power-deficient battery SN, power-deficient battery SOC, power-deficient battery SOH, full battery SN, full battery SOC, full battery SOH, and signature data S1.

The S1 generation process comprises the following steps: the battery replacement vehicle calculates the session ID of the communication process, and the unique identification number SPIN (Service Provider Identification Number) of the battery replacement service provider, the battery replacement station number, the battery replacement time, the battery deficiency SN, the battery deficiency SOC, the battery deficiency SOH, the battery full SN, the battery full SOC and the digest data H1 of the battery full SOH. The battery-powered vehicle encrypts H1 using a vehicle private key stored locally in the vehicle to generate signature data S1.

2) When the power exchange is completed, the cloud or a bill generation module local to the power exchange station checks whether the local power exchange record is completely available. If yes, generating a current electricity exchange bill by using the local electricity exchange record; if not, sending a power change record QUERY request message QUERY REQ to the vehicle through the established vehicle and cloud remote communication connection or WIFI connection of a power change station and the vehicle. The QUERY REQ contains a QUERY key and only one signature data S3.

The generation process of S3 is as follows: and calculating query key value abstract data H3, and encrypting the H3 by using a private key of the battery exchange station to generate signature data S3.

3) And the vehicle receives the QUERY REQ, checks the validity of the message, and reports a power change record QUERY response message QUERY RSP. The QUERY RSP contains a change record and a signature data S4.

The validity checking process of the QUERY REQ is as follows:

(1) Vehicle calculation query key summary data H41

(2) The vehicle decrypts S3 using the public key in the station certificate, generating H42.

(3) If H41 is not equal to H42, the message is discarded, otherwise the power change record is placed in the QUERY RSP and reported.

The signature data generation process in the QUERY RSP is: the vehicle calculates a digest H4 of the electricity change record, and encrypts H4 using the private key of the vehicle to generate signature data S4.

4) And the communication module of the local power conversion system or the cloud system verifies the validity of the QUERY RSP and transmits the power conversion record to the bill generation module.

The validity check of the QUERY RSP is similar to the validity check procedure of the QUERY REQ, and will not be repeated here.

5) The bill generation module verifies the signature data in the electricity change record and generates an electricity change bill by using the electricity change record.

The validity check of the signature data of the power change record is similar to the validity check process of the QUERY REQ, and is not repeated here.

In addition, the heavy truck power exchange service at the present stage has heavy load and short endurance mileage, so that drivers can have mileage anxiety disorder and prefer to exchange full power for goods with few times of goods, the number of times of daily power exchange is increased, the goods exchange operation time is delayed, the vehicle efficiency is reduced, and sometimes the overweight of the vehicle is unknown, so that the vehicle cannot exchange power in time and stops in half.

The tire pressure detection module and the system can be integrated in the battery replacement controller, the tire pressure module can calculate the weight of the vehicle accurately, the mileage that the residual electric quantity of the vehicle can travel can be accurately calculated according to the travel mileage of the vehicle, the weight and the road condition, and if the battery replacement is needed, the battery replacement is reminded, and further the battery replacement is carried out by the method provided by the embodiment, so that the mileage anxiety of a driver is relieved, and the operation efficiency of a motorcade is improved.

The heavy truck power conversion method provided by the embodiment establishes communication connection with the vehicle; acquiring vehicle information through communication connection; according to the vehicle information, the vehicle is subjected to power conversion, and accurate automatic power conversion is realized.

Based on the same inventive concept of the heavy-duty card power conversion method, the embodiment provides an electronic device, which includes: memory, processor, and computer program.

Wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method of reloading a card as described above.

Specifically, a communication connection is established with the vehicle.

And acquiring vehicle information through communication connection.

And according to the vehicle information, the vehicle is subjected to power conversion.

Optionally, establishing a communication connection with the vehicle includes:

Optionally, according to the vehicle information, the vehicle is powered up, including:

an identification of the vehicle is obtained.

And confirming the identity of the vehicle according to the identification and the vehicle information.

And after the success is confirmed, the vehicle is subjected to power change.

Optionally, acquiring the identification of the vehicle includes:

the identification of the vehicle is obtained through a code scanning vehicle number plate or through a radio frequency identification technology.

Optionally, the vehicle is powered up, including:

and establishing a power exchange connection with the vehicle through Bluetooth.

And sending a power change stop position and a power change station position mark to the vehicle based on the power change connection so that the vehicle stops to the power change position according to the power change stop position and the power change station position mark.

And in the process of changing the power of the vehicle, receiving the power changing data of the vehicle based on the power changing connection.

Optionally, after confirming that the power change is completed according to the power change data, the method further includes:

and sending a power change record query request message to the vehicle based on the power change connection. The power change record query request message comprises a query key value and first signature data. The first signature data is obtained by encrypting the abstract of the query key value through a private key.

And receiving a power change record inquiry response message reported by the vehicle based on the power change connection, wherein the power change record inquiry response message comprises a power change record.

And carrying out validity check on the electricity exchange record inquiry response message, and generating a bill after the check is successful.

Optionally, the power change record query response message is reported when the first information is the same as the second information.

The first information is a summary of the query key value obtained by decrypting the first signature data through the public key by the vehicle. The second information calculates a summary of the query key values for the vehicle.

Optionally, after establishing communication connection with the vehicle through the WIFI communication manner, the method further includes:

the location of the vehicle is determined in real time.

And when the vehicle position meets the preset relation, disconnecting the WIFI connection.

The electronic device provided in this embodiment, on which the computer program is executed by the processor, obtains vehicle information by establishing communication connection with the vehicle, and further performs power conversion on the vehicle, thereby realizing accurate automatic power conversion.

Based on the same inventive concept of the heavy-duty card power conversion method, the present embodiment provides a computer on which a computer program can be stored. The computer program is executed by the processor to implement the re-card power-changing method described above.

Specifically, a communication connection is established with the vehicle.

And acquiring vehicle information through communication connection.

Optionally, establishing a communication connection with the vehicle includes:

an identification of the vehicle is obtained.

And after the success is confirmed, the vehicle is subjected to power change.

Optionally, acquiring the identification of the vehicle includes:

Optionally, the vehicle is powered up, including:

the location of the vehicle is determined in real time.

The computer readable storage medium provided in this embodiment has a computer program executed by a processor to obtain vehicle information by establishing a communication connection with a vehicle, and further perform power change on the vehicle, so as to realize accurate automatic power change.

The embodiment further includes a processing step of searching for a heavy truck (electric vehicle) by the power exchange station before the heavy truck is powered on, as shown in fig. 3-6, specifically as follows:

fig. 3 is a flowchart of a power conversion searching method provided by the present invention, as shown in fig. 3, including:

Step S1001: the cloud platform receives a battery exchange search request which is sent by a battery exchange station and contains battery exchange station ID and search distance range information, and acquires the battery exchange station information from a battery exchange station database according to the battery exchange station ID in the search request;

step S1002: the cloud platform acquires a plurality of electric vehicle information from an electric vehicle database according to the battery exchange station information and the search distance range information;

step S1003: and the cloud platform generates corresponding electricity conversion service information according to the information of each electric vehicle and sends the electricity conversion service information to each electric vehicle terminal.

And after each electric vehicle terminal receives the power conversion service information containing the power conversion station information, sending a response service request or a refusal service request to the power conversion station according to the electric vehicle information and the power conversion station information.

The embodiment of the invention also comprises the following steps: when the power exchange station receives a refusing service request sent by an electric vehicle terminal, the power exchange station acquires electric vehicle information corresponding to the electric vehicle terminal, and sends the electric vehicle information corresponding to the electric vehicle terminal to other power exchange stations around the power exchange station through wireless communication, so that the other power exchange stations send power exchange service information containing the power exchange station information to the electric vehicle terminal, and after the electric vehicle terminal receives the power exchange service information containing the power exchange station information, the power exchange station sends a response service request or refusing service request to the power exchange station according to the electric vehicle information and the power exchange station information; or after the electric vehicle terminal receives the service rejection request sent by the electric vehicle terminal, the electric vehicle terminal acquires electric vehicle information corresponding to the electric vehicle terminal, acquires the electric vehicle information of other electric vehicle stations around the electric vehicle terminal through wireless communication, and sends the electric vehicle terminal with the electric vehicle information of the other electric vehicle stations, so that the electric vehicle terminal sends a response service request or a service rejection request to the electric vehicle terminal according to the electric vehicle information and the electric vehicle information.

The embodiment of the invention also comprises the following steps: and each power exchange station periodically broadcasts power exchange station information to the electric vehicle terminals in the distance range, so that the electric vehicle terminals receiving the power exchange station information send response service requests or refusal service requests to the power exchange stations according to the electric vehicle information and the power exchange station information.

In addition, it should be noted that the cloud platform refers to a cloud platform corresponding to a certain geographic position range, and when the electric vehicle moves to other geographic position ranges, the electric vehicle is automatically switched from the current cloud platform to other cloud platforms to perform data management, so that the technical problem of large data volume of the cloud platform is solved.

Specifically, the power exchange station database comprises a power exchange station ID and power exchange station information, wherein the power exchange station information comprises a power exchange station geographic position, a total number of batteries, current electricity quantity of each battery, current available battery quantity, current electric vehicle power exchange time, total power exchange time for exchanging power for each electric vehicle and current electric vehicle quantity to be exchanged; the electric vehicle database comprises electric vehicle terminal information and electric vehicle information, wherein the electric vehicle information comprises number information, license plate information, current geographic position information and current electric quantity information.

The embodiment of the invention also comprises the following steps: the electric vehicle terminal acquires electric vehicle information in real time, and periodically transmits the electric vehicle information to the cloud platform, so that the cloud platform periodically updates the electric vehicle information corresponding to the electric vehicle terminal; and the power exchange station acquires the power exchange station information in real time, and periodically transmits the power exchange station ID and the power exchange station information to the cloud platform, so that the cloud platform updates the power exchange station information corresponding to the power exchange station ID in real time.

Specifically, the cloud platform acquiring a plurality of electric vehicle information from an electric vehicle database according to the battery exchange station information and the search distance range information includes: the cloud platform determines the searching geographical position area range of the electric vehicle according to the geographical position of the battery exchange station in the battery exchange station information and the searching distance range information; and the cloud platform searches a geographical position area range according to the electric vehicles, queries a plurality of electric vehicles conforming to the electric vehicle searching area from an electric vehicle database, and acquires electric vehicle information conforming to each electric vehicle in the electric vehicle searching area from the electric vehicle database.

Further, the cloud platform searches a geographical location area range according to the electric vehicle, and the searching of the plurality of electric vehicles which conform to the electric vehicle searching area from the electric vehicle database comprises the following steps: the cloud platform converts the geographical position of the power exchange station in the power exchange station information into hash value data composed of M letters, and extracts the first N letters from the M letters of the hash value data according to the searching distance range information to obtain the hash value data composed of N letters; the cloud platform determines a polygonal shape of a search area according to search precision configured by a user, and converts the electric vehicle search geographic position area range into a search geographic position area range of the polygonal shape; the cloud platform queries a plurality of electric vehicles conforming to the searching geographic position area range of the polygonal shape from the electric vehicle database according to the hash value data composed of N letters and the searching geographic position area range of the polygonal shape; wherein, M, N is a positive integer, and M is greater than or equal to N.

Specifically, the cloud platform generates corresponding power conversion service information according to each electric vehicle information, and sends the power conversion service information to each electric vehicle terminal includes: determining the electric quantity level of each electric vehicle according to the current electric quantity information in the information of the electric vehicle; and the cloud platform generates corresponding power conversion service information according to the electric quantity level of the electric vehicle and sends the power conversion service information to the electric vehicle terminal. The cloud platform generates corresponding power conversion service information according to the electric quantity level of the electric vehicle, and the power conversion service information comprises the following steps: when the electric quantity level of the electric vehicle is a high electric quantity level, the cloud platform estimates the current running distance range of the electric vehicle according to the current electric quantity information of the electric vehicle, searches corresponding battery exchange station information according to the current running distance range of the electric vehicle and the current geographic position information of the electric vehicle, and sends the battery exchange station information to the electric vehicle; when the electric quantity level of the electric vehicle is a low electric quantity level, the cloud platform searches for the information of a battery exchange station at the nearest geographic position of the electric vehicle according to the information of the current geographic position of the electric vehicle and the current running distance of the electric vehicle, and sends the information of the battery exchange station to the electric vehicle.

The embodiment further includes a processing step of searching for a power exchange station for the heavy truck (electric vehicle) before the heavy truck is powered on, specifically including the following steps:

fig. 4 is a flowchart of a power conversion searching method provided by an embodiment of the present invention, as shown in fig. 4, including:

step S2001: the cloud platform receives and acquires electric vehicle information corresponding to an electric vehicle terminal from an electric vehicle database according to a battery-changing search request which is sent by the electric vehicle terminal and contains search distance range information;

step S2002: the cloud platform acquires a plurality of pieces of battery exchange station information from a battery exchange station database according to the electric vehicle information corresponding to the electric vehicle terminal and the search distance range information, and sends the plurality of pieces of battery exchange station information to the electric vehicle terminal;

step S2003: and the electric vehicle terminal generates corresponding power conversion service information according to the power conversion station information selected by the user from the plurality of power conversion station information, and sends the power conversion service information to the selected power conversion station.

Specifically, the cloud platform obtains a plurality of battery exchange station information from a battery exchange station database according to the electric vehicle information corresponding to the electric vehicle terminal and the search distance range information, including: the cloud platform determines a geographical position area range searched by the battery exchange station according to the current geographical position information in the electric vehicle information and the searching distance range information; and the cloud platform searches a geographical position area range according to the battery exchange stations, queries a plurality of battery exchange stations conforming to the battery exchange station search area from a battery exchange station database, and acquires battery exchange station information conforming to each battery exchange station in the battery exchange station search area from the battery exchange station database.

Still further, the cloud platform searching the geographical location area range according to the power exchange station, and searching the plurality of power exchange stations in the power exchange station searching area from the power exchange station database includes: the cloud platform converts the current geographic position information of the electric vehicle into hash value data composed of M letters, and extracts the first N letters from the M letters of the hash value data according to the search distance range information to obtain the hash value data composed of N letters; the cloud platform determines the polygon shape of a search area according to the search precision configured by a user, and converts the search geographical position area range of the battery exchange station into the search geographical position area range of the polygon shape; the cloud platform queries a plurality of power exchange stations conforming to the searching geographical position area range of the polygonal shape from the power exchange station database according to the hash value data consisting of N letters and the searching geographical position area range of the polygonal shape; wherein, M, N is a positive integer, and M is greater than or equal to N.

A tool box (Tbox) installed on each electric vehicle (heavy truck) can push the geographic position of the vehicle and the residual electric quantity of the vehicle to a designated platform (cloud platform) in real time, and the platform processes and stores the geographic position and the electric quantity information; the serial numbers and longitude and latitude information of the power exchange station and the charging pile are also processed and stored in service.

The driver searches the power exchange station and directly gives the distance range to quickly search out the information of the power exchange station; the distance range of the power exchange station can quickly check the information of the nearby vehicles.

The driver looks at the time when the vehicle charge is low (< 30%) to search for the station (the current geographical location of the vehicle) or the station to search for the vehicle (the geographical location of the station) every 10 minutes. The two-dimensional data of the geographic position (longitude; latitude) is converted into one-dimensional data (hash value) to be stored for quick searching, and the round is converted into the polygon during searching, so that searching is facilitated.

After the power exchange station searches the nearby vehicle information, the specific content sent to the driver can be determined according to the vehicle electric quantity and the actual distance by combining the current available electric quantity information of the power exchange station.

1. Converting the geographical position of the power exchange station or the geographical position of the electric vehicle into a hash value

Longitude (latitude) and latitude (latitude) of the geographic location, converting into two binary numbers according to a dichotomy mode, and then synthesizing the two binary numbers into one; and finally synthesizing a letter from every three binary digits to form a hash value. For example, eastern pearl, longitude: 121.49491, latitude: 31.24169; converting into binary values (11010110011001010111, 10101100011011101100); the longitude and latitude intersection (longitude is placed in odd number and latitude is placed in even number) is integrated into 1110011001111000001111000111011001111010; the hash value (one English letter is synthesized by combining every three digits from left to right) hbeheahedfehfa is synthesized.

The driver searches the power exchange station and preliminarily matches the information of the power exchange station meeting the condition from a database (comprising the vehicle information, the power exchange station, the driver information and the corresponding relation between the vehicle and the driver which are created by the driver) according to the range distance and the hash value converted by the current position of the driver. For example: the driver searches the information of the power exchange station within the distance of 5KM from the Oriental pearl, and the hash value corresponding to the current longitude and latitude of the driver is hbeheahedfehfa, according to the table 1: the key precision data table can be known as long as the first 8 digits are matched (the first 8 digits of the driver are hbeheahe); data matching hbeheahe is queried from the database according to the eight-bit hash (arbitrary value of unrestricted length).

Table 1: data table with key precision

Number of letters	Length of corresponding coverage (km)
		4	105-320
5	41-104
		6	6-40
8	0.3-5
		11	0-0.2

Secondly, converting the search range from a circle to a polygon

Some of the battery exchange station information that is quickly searched based on the hash is inaccurate (out of range). Generally, a circle (accurate in the circle) is used, but the speed that the circle cannot be indexed in the database is slow, so that the circle is considered to be converted into a polygon, and the polygon is convenient to query in the database.

And comparing whether the geographic position points meet X epsilon [ X1, X2] and Y epsilon [ Y1, Y2] according to the minimum and maximum values of the X axis and the Y axis corresponding to the polygon.

The polygon edge number calculation method is analyzed below.

Two ways of converting a circle into a polygon:

the variable description is shown in Table 2

Table 2: description of variables

The following description will be given of a quarter circle (sector)

2.1 inscribing polygons as shown in FIG. 5

n tangent points- > (n+1) sides- > (n+1) triangles

>α＝90°/(n+1)＝π/(2*(n+1))

Triangle total area S delta=0.5×r2 (n+1) ×sin (pi/((n+1) ×2))

Sector area so=0.25 pi r2

The coverage duty (precision) is

accuracy＝S△/S○＝2*(n+1)*sin(π/((n+1)*2))/π

The specific values of the precision are shown in table 3:

TABLE 3 precision relationship table

Number of quarter circle tangent points	Accuracy%
		1	90
2	95
		4	98
6	99
		10	99.7

2.2 circumscribed polygons as shown in FIG. 5

n tangent points- > (n+1) sides- > (n+1) triangles

>α＝90°/(n+1)＝π/(2*(n+1))

Triangle total area S Δ=0.5 (n+1) tan ((n+1) 2)

Sector area so=0.25 pi r2

Then the coverage (accuracy) ratio is

accuracy=2-S Δs =2-2 (n+1) ×tan (pi/((n+1) ×2))/pi precision values as shown in table 4:

TABLE 4 precision relationship table

According to the above summary accuracy

Whether or not to only more or less	Precision of
		Is that	2–2(n+1)tan(π/((n+1)2))/π
Whether or not	2(n+1)sin(π/((n+1)*2))/π

The edge number calculation mode is as follows:

precision is required (taking the maximum value of the minimum longitude):

need_accuracy＝max[(1–r/single_accuracy_length),lowest_accuracy]

the number of tangent points (the precision below is the precision value corresponding to the above inner or outer polygon):

theoretical precision > = required precision- > number of inner points of sector n- > number of triangle sides in sector (n+1)

3. Message content sent to driver by power exchange station

For the nearby vehicle information searched by the battery exchange station, how to select the content of the short message sent to the driver is specifically judged as follows

Percentage of vehicle electric quantity	Power level
		[80,100]	High electric quantity
[30,80]	General electric quantity
		[10,30]	Low power
[0,10]	Requiring replacement of electricity

3.1, for high-power, general-power vehicles:

the vehicle runs to the range of the length of the power change required: [ vehicle current distance-20 KM, vehicle current distance +20KM ]

And searching corresponding battery exchange station information according to the current geographic position and the length range of the vehicle, and sending the assembled information to a driver battery exchange station to introduce the battery exchange station position and the battery exchange level uniform time information.

3.2, for low battery vehicles:

and searching out information of all directly-exchangeable power stations (the number of the remaining full-power batteries is greater than 0) in the current driving distance of the vehicle according to the geographic position of the vehicle, and sending a recommended short message (specific position of the power station; the number of the vehicle currently being exchanged; the vehicle can be directly exchanged; the consumed time of the power exchange; and the approximate time required for reaching the power station).

3.3, for vehicles needing power change:

the power change time that needs to wait when the vehicle arrives:

driver required waiting time = new vehicle required waiting time 2-travel time required for the vehicle to reach the station;

And searching out two power exchange station information (except the current power exchange station) with the distance being the current driving distance of the vehicle according to the current geographic position of the vehicle.

The current station sent to the driver may require waiting time and additionally one or two stations closer in distance.

As shown in fig. 6, the power exchange station: the power station for quickly replacing the power battery is provided for the power battery of the electric automobile. Vehicle: electric car (heavy truck, mine truck, etc.). Driver: an electric automobile driver. Digital cloud platform: and maintaining a platform integrating station, vehicle and person information. The specific real-time steps comprise:

1) Station information reporting: geographical location information of the battery being replaced, the number of batteries currently available, and the vehicle being replaced.

Geographic location information: the newly built power exchange station adds geographic position information to the cloud platform.

Number of available batteries: adding or using a battery in a power exchange station, and recording by station operators on a cloud platform page; the actual number is checked and corrected at regular intervals (one week).

Current number of change cars: a vehicle to be powered on is started, and station operators record on a cloud platform; the vehicle state that the vehicle just comes does not begin to change electricity is a waiting state, and the vehicle state that the vehicle begins to change electricity is changed into electricity by an operator, and the cloud platform changes the vehicle state exceeding electricity change to 5 minutes into electricity change completion at regular time (5 minutes).

2) Reporting vehicle information: the current geographic position information of the vehicle and the available electric quantity information of the vehicle.

And the Tbox installed on the vehicle sends the current geographic position of the vehicle and the current electric quantity of the vehicle to the cloud platform at regular time (every 30 s).

3) Preservation or update: the cloud platform stores or updates vehicle and battery exchange station information.

Vehicle information: the cloud platform receives the Tbox information in the step 2, judges whether the vehicle exists or not, and adds the vehicle to a cloud platform database (the current geographic position of the vehicle, electric quantity and vehicle driver information); if present, the current information of the vehicle (current geographic position of the vehicle, electric quantity and information of a driver of the vehicle) is updated.

A power exchange station: when the station operator operates the cloud platform page, the information (the number of available batteries, the number of waiting vehicles and the number of on-exchange vehicles) stored in the cloud platform database by the exchange station is updated.

4) And (5) station periodical search: the power exchange station periodically searches for nearby vehicles.

The cloud platform to which the station is docked will be every 10 minutes.

5) And (3) searching out vehicles: and searching the vehicle information meeting the specified range from the cloud platform.

The nearby vehicle information (vehicle number, current geographic position) is searched for by the distance range (500 m,1000m,1500 m).

6) And (3) data assembly: and cleaning and filtering the data to screen out the vehicle data meeting the requirements.

The cloud platform filters the details of the vehicle (for example, searching for 500m of the vehicle, but the actual distance of the vehicle is 520m, which is the requirement of the over-distance to be filtered); and (3) according to the vehicle number, the current electric quantity information and the driver information of the vehicle are searched out from the database, and then the vehicle is assembled into a required data format.

7) Vehicle electric quantity: and 4) dividing the vehicle data screened in the step 6) according to the specified electric quantity intervals.

After the cloud platform obtains the search result, interval division (high electric quantity, general electric quantity, low electric quantity and power change requirement) is carried out according to the actual electric quantity.

8) Information type, and messaging: and obtaining the type of the message to be sent according to the electric quantity interval divided by 7.

After the electric quantity interval is obtained, the cloud platform assembles the judgment in the short message content (according to 3.1/3.2/3.3) and sends the judgment to a specific driver.

Before the heavy truck is powered on, the embodiment further comprises a processing step of the power-on station for carrying out power-on authentication on the heavy truck (power-on vehicle), as shown in fig. 7-8, specifically as follows:

fig. 7 is a flowchart of a power conversion authentication method provided by the present invention, as shown in fig. 7, including:

step S4001: the power exchange station acquires power exchange vehicle information and power-shortage battery information of a power exchange vehicle, and sends an authentication request containing the power exchange station information, the power exchange vehicle information and the power-shortage battery information to the power exchange station;

Step S4002: the battery exchange platform acquires an authentication strategy according to the battery exchange station information in the authentication request, and authenticates the battery exchange vehicle information and the battery deficiency battery information by utilizing the authentication strategy to acquire an authentication result;

step S4003: and the power exchange platform sends the authentication result to the power exchange station, so that the power exchange station determines whether the power exchange vehicle is allowed to exchange power or not according to the authentication result.

The embodiment of the invention also comprises the following steps: and a first communication link is established between the battery exchange vehicle and the battery exchange station, and a second communication link is established between the battery exchange station and the battery exchange station.

Furthermore, a communication interface between the battery exchange vehicle and the battery exchange station is realized by adopting a communication mode based on TCP/IP Socket, and the battery exchange vehicle is in a long connection working mode. The battery exchange vehicle and the battery exchange station can be deployed in the same or different enterprise network environments, and can be connected with each other through a local area network or the Internet.

The communication mode of Server/Client is adopted:

1) TBox is used as Client side; 2) The station control is used as a Server side;

communication protocol

1) The communication data message adopts a binary format;

2) The Client side automatically makes a connection request to the Server side, and after the connection is successful, a push mode is adopted to send a protocol data packet to the Server side;

3) The single-packet transmission mode is uniformly adopted, and the multi-packet transmission mode is not adopted;

4) The sending mode and the frequency of the Client side can be set;

5) Carrying out validity check on the received data packet, wherein the validity check comprises a plurality of attributes such as communication length, checksum calculation, command codes and the like;

6) The client needs to automatically maintain the validity of the communication connection state, and after initialization and disconnection, connection attempt is automatically performed until connection is restored.

Heartbeat packet mechanism:

after the client is successfully connected to the server, a separate task mechanism needs to be set to detect the stability and reliability of communication connection, a heartbeat packet is sent to the server periodically, the server gives a response under normal conditions, if 10 times of no response exists, the connection of the server fails, and the client must reset the connection to apply for a connection request to the server again. The heartbeat interval time is 2 seconds and the timeout number is 10 times, and the timeout time is 20 seconds.

The heartbeat packet has the following implementation functions: 1) The client sends a heartbeat packet to the server at regular time, and the server returns a heartbeat response to the vehicle-mounted battery replacement controller according to the requirement. 2) After the client sends the heartbeat packet, the client starts to count for 10 times, considers that the heartbeat is overtime, closes the current connection, resumes the connection working state, and automatically reinitiates the TCP connection.

Establishing a second communication link between the battery exchange station and the battery exchange station includes: and a second communication link is established between the battery exchange station and the battery exchange station through wireless communication.

And the battery exchange station sends a starting request to the battery exchange station through the uplink message of the second communication link request, and the battery exchange station responds to the downlink message through the second communication link to recover whether the battery exchange is allowed or not.

Specifically, the step of obtaining the information of the battery replacement vehicle and the information of the battery replacement vehicle by the battery replacement station includes: the power exchange station receives a power exchange request which is sent by the power exchange vehicle and contains power exchange vehicle information and power shortage battery information through the first communication link; or the power exchange station reads the information of the power exchange vehicle and the information of the battery with the power shortage of the power exchange vehicle; the vehicle replacement information comprises a vehicle identification code, a license plate number, a radio frequency identification RFID code, fleet information and a vehicle type; the low battery information includes a battery product serial number SN and a battery state of charge SOC.

The level changing station obtains an authentication policy according to the level changing station information in the authentication request, and authenticates the level changing vehicle information and the power-deficient battery information by using the authentication policy, and the obtaining an authentication result comprises: the level changing platform acquires an authentication strategy corresponding to the power exchange station information from a preset authentication strategy table according to the power exchange station information in the authentication request; the battery replacement platform authenticates the battery replacement vehicle information and the battery deficiency battery information according to the authentication strategy to obtain an authentication result; wherein the station information includes a station ID, a station location.

Further, the authentication policy table comprises information of a power exchange station, an authentication policy scene and an authentication policy; the level changing station obtains an authentication policy corresponding to the station information from a preset authentication policy table according to the station information in the authentication request, wherein the step of obtaining the authentication policy corresponding to the station information comprises the following steps: the level changing platform acquires an authentication policy scene corresponding to the information of the power changing station from a preset authentication policy table according to the information of the power changing station in the authentication request, and determines an authentication policy corresponding to the authentication policy scene according to the authentication policy scene; the authentication strategy comprises a strong authentication strategy and a weak authentication strategy; the strong authentication strategy means that the authentication of both the vehicle information and the battery information with the power shortage is successful; the weak authentication strategy means that the authentication of the battery information of the battery with the power shortage or the power exchange vehicle information is successful.

Authentication policy table

Furthermore, the level changing station uses the authentication policy to authenticate the vehicle information and the battery information with power shortage, and the obtaining the authentication result includes: when the authentication policy is a strong authentication policy, the level changing platform respectively authenticates the vehicle information of the power exchanging and the battery information of the power shortage, if the vehicle information of the power exchanging and the battery information of the power shortage are authenticated, the authentication result is successful, otherwise, the authentication result is failed; when the authentication policy is a weak authentication policy, the level changing platform respectively authenticates the vehicle information and the battery information with the power shortage, if the vehicle information and/or the battery information with the power shortage passes the authentication, the authentication result is authentication success, otherwise, the authentication result is authentication failure.

Wherein, the power exchange station determining whether to allow the power exchange vehicle to exchange power according to the authentication result comprises: when the authentication result is that the authentication is successful, the power exchange station allows the power exchange vehicle to exchange power; and when the authentication result is that the authentication fails, the power exchange station does not allow the power exchange vehicle to exchange power.

Fig. 8 is a detailed flowchart of a power conversion authentication method provided by the present invention, as shown in fig. 8, including:

step one, when a power exchange controller of a power exchange vehicle is connected to a power exchange station WIFI, the power exchange controller actively transmits a heartbeat message (0 x 01), the heartbeat is periodically transmitted, and a station control (power exchange station) replies corresponding heartbeat data (0 x 02);

step two, when the battery replacement station issues a battery replacement control instruction to the battery replacement station control, the battery replacement station control pushes battery replacement station information, information of a vehicle to be replaced and taken-down battery deficiency information to the platform;

pushing the acquired battery information, battery exchange station information and vehicle exchange information to an authentication server by the battery exchange platform;

step four, searching a corresponding authentication strategy in an authentication server by using the information of the power exchange station for power exchange;

the authentication strategies are divided into a closed station strategy, a special station strategy, an open public station strategy and the like, different authentication strategies are called according to different scenes, and the authentication strategies are carried out on vehicles, batteries and power exchange stations in the scene range;

Strong authentication refers to the accurate authentication verification of the vehicle, the battery and the battery exchange station;

weak authentication means that the vehicle or the battery is not subjected to accurate authentication verification, but only other elements are subjected to accurate authentication, and partial passing is regarded as passing; and according to the actual service operation scene, the self-configuration is carried out. For example, weak authentication does not perform accurate authentication verification on the vehicle, but only performs accurate authentication on the battery and the battery; the weak authentication does not perform accurate authentication verification on the battery, but only performs accurate authentication on the battery exchange station and the vehicle.

Step five, acquiring an authentication strategy, and comparing the authentication strategy with the acquired battery information of the battery replacement vehicle and the battery with power shortage;

if the authentication strategy fails to be compared with any one or both of the battery information of the battery replacement vehicle and the battery with the power shortage, returning an authentication result to be failure, and generating a command for prohibiting the battery replacement to be sent to the battery replacement station.

Step six, authentication is completed, and the use rights of the vehicle and the battery are determined;

if the use authority of any one or both of the battery information of the battery replacement vehicle and the battery lack battery of the access equipment is not passed, returning an authentication result to be failed, and generating a command for prohibiting battery replacement and sending the command to the battery replacement station.

And step seven, the identification codes of the battery replacement vehicle and the battery of the access equipment are in a white list, authentication is passed, and the battery replacement platform pushes information to the battery replacement station to allow the vehicle to start battery replacement.

If the use authority of any one or both of the battery information identification codes of the battery replacement vehicle and the battery lack battery of the access equipment fails, returning an authentication result to be failed, and generating a power replacement prohibition instruction to be sent to the battery replacement station.

The power-change pre-check request is sent to the station control by the power-change level platform, and whether the current vehicle has power-change conditions on the station is checked, specifically whether the pre-check is passed or not is realized through a request uplink message and a response downlink message.

The embodiment further includes the processing steps of safety protection in the process of changing power of the heavy truck (vehicle), as shown in fig. 9-11, specifically as follows:

fig. 9 is a flowchart of a safety protection method in a power conversion process, as shown in fig. 9, including:

step S3001: when a vehicle is stirred to an ON gear by a user and a whole vehicle controller is awakened, the whole vehicle controller sends a self-checking instruction to a battery management system;

step S3002: the battery management system acquires a current system state mode according to the self-checking instruction;

step S3003: when the current system state mode is a system state mode in power conversion, the battery management system sends a self-checking abnormal message to the whole vehicle controller, so that the whole vehicle controller terminates the current power-on flow of the vehicle according to the self-checking abnormal message.

Further, when the current system state mode is a system state mode in power conversion, the battery management system sends a self-checking abnormal message to the whole vehicle controller, so that the whole vehicle controller terminates the current process of the current vehicle according to the self-checking abnormal message, including: when the current system state mode is a system state mode in power conversion, the battery management system generates a self-checking abnormal message containing a fault cause in battery power conversion and sends the self-checking abnormal message containing the fault cause in battery power conversion to the whole vehicle controller; and the whole vehicle controller terminates the current power-on flow of the vehicle according to the self-checking abnormal message containing the fault cause in battery power change.

After the whole vehicle controller terminates the current up-stroke of the current vehicle, the method further comprises the following steps: and the whole vehicle controller periodically sends a fault message containing the battery power conversion to the digital instrument through the CAN network, so that the digital instrument displays the fault message in the battery power conversion.

The embodiment of the invention also comprises the following steps: when the current system state mode is a normal system state mode, the battery management system detects whether the current battery state is normal, and when the current battery state is detected to be normal, a self-checking normal message is sent to the whole vehicle controller, so that the whole vehicle controller returns a high-voltage instruction on a battery to the battery management system according to the self-checking normal message; the battery management system closes a battery main contactor and a high-voltage contactor of the thermal management system according to the high-voltage instruction on the battery, so as to finish the current-up process of the current vehicle; when the current battery state is abnormal, a self-checking abnormal message is sent to the whole vehicle controller, so that the whole vehicle controller terminates the current power-on flow of the vehicle according to the self-checking abnormal message.

Wherein, the battery management system detecting whether the current battery state is normal comprises: detecting whether the current battery state is available, whether insulation is normal, whether high-voltage interlocking is normal, whether a relay is normal, whether a battery thermal management system is normal, whether voltage/current/temperature is normal and the like, and if the current battery state is detected to be available, whether insulation, high-voltage interlocking, the relay, the battery thermal management system and voltage/current/temperature are all normal, detecting that the current battery state is normal; if the current battery state is detected to be unavailable or at least one of insulation, high voltage interlock, relay, battery thermal management system and voltage/current/temperature is abnormal, detecting that the current battery state is abnormal.

After the vehicle controller returns the high-voltage instruction on the battery to the battery management system, the method further comprises the following steps: and the whole vehicle controller periodically sends a normal message containing the completion of battery power conversion to the digital instrument through the CAN network, so that the digital instrument displays the normal message of the completion of battery power conversion.

The embodiment of the invention also comprises the following steps: when a power change controller receives a power change starting instruction of a power change station, switching a current normal system state mode to a power change system state mode, and periodically reporting the power change system state mode to a battery management system through a CAN (controller area network); the battery management system stores the system state mode in power conversion, and sets the current battery state to be unavailable according to the system state mode in power conversion, so that the closing of a battery main contactor and a high-voltage contactor of a thermal management system caused by abnormality is avoided.

The embodiment of the invention also comprises the following steps: when a power change controller receives a power change ending instruction of a power change station, switching a current system state mode in power change to a normal system state mode, and periodically reporting the normal system state mode to a battery management system through a CAN (controller area network); the battery management system saves the normal system state mode and sets the current battery state to be available according to the normal system state mode.

Fig. 10 is a flowchart of a safe power change process provided by the present invention, and as shown in fig. 10, the change power change controller BSC (Battery Swap Controller) is merely used as a positioning device for command transceiver. The power change controller BSC (Battery Swap Controller) is divided into a power change system state and a non-power change system state. When the vehicle is in power exchange, the power exchange controller BSC (Battery Swap Controller) actively reports the power exchange state to the battery management system BMS, and the battery management system BMS presents an unavailable state to the whole vehicle controller VCU (Vehicle Control Unit). The specific flow comprises the following steps:

step A1: after the self-checking is completed, the SCS sends a power-changing start instruction to the BSC.

Step A2: after receiving the command of starting power change, the BSC completes self-checking of the state of the power change system, then sets the current state of the power change system as 'in power change' in the state management module, and continuously sends a power change system state update message to the BMS. Finally, a response message is replied to the SCS, wherein the response message comprises: and starting an instruction execution result and a locking state.

Step A3: after receiving the update message of the state of the power-changing system, the battery management system BMS sets the state of the battery to be unavailable.

Step A4: the battery cell control system SCS sends an unlocking instruction to the battery cell controller BSC. After receiving the unlocking instruction, the BSC drives the locking mechanism to unlock the battery, and finally replies a response message to the SCS, wherein the response message comprises: unlocking instruction execution results, battery change system status, serial number to detach battery, vehicle VIN code (Vehicle Identification Number), detach battery state of charge SOC (State Of Charge), detach battery state of health SOH (State Of Health).

Step A5: the battery-changing station control system SCS drives the battery-changing robot to remove the current car-mounted battery and to change a new battery.

Step A6: the battery cell control system SCS sends a locking instruction to the battery cell controller BSC. After receiving the locking instruction, the BSC drives the locking mechanism to lock the battery, and finally replies a response message to the SCS, wherein the response message comprises: the execution result of the locking instruction, the state of the power exchange system, the serial number of the battery, the vehicle VIN code, the SOC of the battery, and the SOH of the battery.

Step A7: the control system SCS of the power exchange station firstly completes the environmental safety check of the power exchange station, confirms that the power exchange station has the safety starting condition of the vehicle, and finally sends a power exchange ending instruction to the power exchange controller BSC.

Step A8: after receiving the instruction of ending the power exchange, the BSC firstly sets the current power exchange system state as normal, and simultaneously continuously sends a power exchange system state update message to the BMS, and finally replies a response message to the SCS, wherein the response message comprises: ending instruction execution results, a battery replacement system state, a self-checking state, a serial number of a replaced battery, a vehicle VIN code, a battery charge state SOC and a battery health state SOH.

Step A9: after receiving the update message of the state of the power-changing system, the battery management system BMS sets the state of the battery to be normal.

Fig. 11 is a specific flowchart of a safety protection method in a power conversion process provided by the present invention, as shown in fig. 11, including:

step B1: the driver dials the gear to the ON gear, and the ON gear wakes up the whole vehicle controller VCU through a hard wire high-level signal.

Step B2: after the whole vehicle controller VCU is awakened, a self-checking instruction is sent to the battery management system BMS.

Step B3: the battery management system BMS performs a self-state check while checking a self-battery state. If the battery status is "available", the B3.2 flow is performed, otherwise the B3.1 flow is performed

The B3.1 flow is described as follows:

step B3.1.1: the battery management system BMS reports a BMS secondary fault to the whole vehicle controller VCU, wherein the fault is caused by' power change.

Step B3.1.2: and after the complete vehicle controller VCU recognizes the BMS secondary fault, the power-on flow is terminated, and meanwhile, the BMS secondary fault is reported to the digital instrument ICU, and the fault is caused by 'power-on-battery-change'.

Step B3.1.3: the digitizer ICU displays BMS secondary fault information as "in-battery-change" and presents a response fault code.

Step B3.1.4: after the driver acquires the fault information as information, waiting for the end of the power change.

The B3.2 flow is described as follows:

step B3.2.1: the battery management system BMS reports the normal self-check to the whole vehicle controller VCU.

Step B3.2.2: the vehicle control unit VCU sends an on-battery high voltage command to the battery management system BMS.

Step B3.2.3: the battery management system BMS closes the battery main contactor and the thermal management system high voltage contactor.

Step B3.2.4: the complete vehicle controller VCU reports the completion of power up to the digitizer ICU.

Step B3.2.5: after the driver observes that the instrument panel is all normal, the driver can drive from the power station by engaging the forward gear.

Fig. 5 is a specific schematic diagram of a safety protection system in a power conversion process according to the present invention, as shown in fig. 5, including:

5.1, a station control system SCS of a power exchange station:

511 With an environment awareness management module. Whether the power exchange station has conditions for exiting the power exchange station can be output according to safety risk factors identified by various environmental sensors deployed in the station.

512 With a self-test module. The failure of the motor replacing robot can be identified, and whether the power replacing system at the output station end works normally or not can be identified.

5.2, a power conversion controller BSC:

521 With a status management module. And storing the state of the vehicle-mounted power change system, wherein the value comprises 'in power change' and 'normal'.

522 With a self-test module. The locking mechanism and the power conversion connector can be identified to be faulty, and whether the power conversion system at the output vehicle end works normally or not can be identified.

523 The control module detects the state management module in real time and continuously sends a state update message of the power conversion system to the battery management system BMS through the power CAN (Controller Area Network) network according to the detection result.

5.3, battery management system BMS:

531 With a status management module. The battery state is stored and the values include "available" and "unavailable". When the power change system state reported by the power change controller BSC is 'in power change', the BMS sets the battery state as 'unavailable'; when the power conversion system state reported by the power conversion controller BSC is normal, the BMS sets the battery state as available; when the message times out, the BMS sets the battery status to "unknown".

532 When the BMS receives the self-checking command sent by the VCU from the power CAN network, the BMS needs to check the battery state in addition to performing insulation detection, high-voltage interlock detection, operating voltage and temperature detection, and the like. And when the battery state is unavailable or unknown, sending a BMS secondary fault message to the VCU through the power CAN network, and otherwise, sending a self-checking normal message. Wherein, the secondary failure cause of the BMS is "in the power conversion" when the battery state is "unavailable", and the secondary failure cause of the BMS is "communication timeout" when the battery state is "unknown".

5.4, the whole vehicle controller VCU: when a secondary fault of the BMS in power conversion is received, the current upper high-voltage flow is required to be terminated, and corresponding information is forwarded to the digital instrument ICU.

5.5, digitizer ICU: when receiving the secondary fault of the BMS forwarded by the VCU, the corresponding fault code is required to be converted into a power-on-battery-change display on the instrument panel

The power change system state update message is a CAN network message, and is sent by a power change controller BSC, wherein the sending period is 100 milliseconds. The transmission content comprises: a power conversion system state, a locking state and a connector state. The specific values are as follows:

in summary, the invention has the following advantages: the damage of a power exchange station or a battery caused by abnormal ignition and starting of a vehicle in power exchange can be avoided, and personal safety accidents are avoided; whether the power exchange station has a driving-out condition or not can be perceived, and personal safety accidents of drivers caused by unsafe environment can be effectively prevented.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The solutions in the embodiments of the present application may be implemented in various computer languages, for example, object-oriented programming language Java, and an transliterated scripting language JavaScript, etc.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. The method for replacing the heavy truck is characterized by comprising the following steps of:

establishing a communication connection with the vehicle;

acquiring vehicle information through the communication connection;

2. The method of claim 1, wherein the establishing a communication connection with a vehicle comprises:

3. The method of claim 1, wherein said changing the vehicle from the vehicle information comprises:

acquiring an identification of the vehicle;

4. A method according to claim 3, wherein said obtaining an identification of said vehicle comprises:

5. A method according to claim 3, wherein said powering the vehicle comprises:

establishing a power exchange connection with a vehicle through Bluetooth;

6. The method of claim 5, wherein after confirming completion of the power change based on the power change data, further comprising:

7. The method of claim 6, wherein the change record query response message is reported when the first information is the same as the second information;

8. The method of claim 2, further comprising, after the communication connection is established with the vehicle via WIFI communication,:

determining the position of the vehicle in real time;

9. An electronic device, comprising:

a memory;

a processor; and

a computer program;

wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method of any of claims 1-8.

10. A computer-readable storage medium, characterized in that a computer program is stored thereon; the computer program being executed by a processor to implement the method of any of claims 1-8.