A battery pack screw automatic tightening method, system, device and medium

Abstract

The application provides a battery pack screw automatic tightening method, system, equipment and medium in the technical field of battery pack assembly, which comprises the following steps: step S1, an industrial computer sends a tightening instruction carrying a product model and a product number to a PLC based on a TCP protocol; step S2, the PLC analyzes the received tightening instruction to obtain the product model and the product number, and matches corresponding screw spacing, tightening path and torque from a database based on the product model; step S3, the PLC adjusts the spacing of two tightening guns through a servo motor based on the screw spacing, moves the two tightening guns through a six-axis robot, and automatically tightens the screws of the battery pack on the tightening station based on the tightening path and the torque; and step S4, after completing the tightening of all the screws of the battery pack, the PLC generates a tightening report and sends the tightening report to the industrial computer in real time based on the TCP protocol. The application has the advantage that the compatibility of the battery pack screw tightening is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pack assembly, and in particular to a method, system, equipment and medium for automatically tightening screws of a battery pack. Background Art

[0002] With the growing strength of the new energy industry, battery pack assembly technology is constantly being updated and iterated, and the manufacturing process is constantly improving. The variety of battery packs is also increasing. During the battery pack assembly process, screws must be tightened to secure the pack. However, traditional tightening assembly lines are only capable of tightening for a certain type (model) of battery pack and are not compatible with multiple types. Furthermore, the assembly process for different battery pack types varies. Switching between battery pack types requires modifying the tightening assembly line or installing a new one. The corresponding control system also needs to be redesigned to accommodate the different battery pack assembly processes, increasing both workload and costs.

[0003] Therefore, how to provide a method, system, equipment and medium for automatically tightening battery pack screws to improve the compatibility of battery pack screw tightening has become a technical problem that needs to be solved urgently. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method, system, equipment and medium for automatically tightening battery pack screws, so as to improve the compatibility of tightening battery pack screws.

[0005] In a first aspect, the present invention provides a method for automatically tightening screws of a battery pack, comprising the following steps:

[0006] Step S1: The industrial computer sends a tightening instruction carrying the product model and product number to the PLC based on the TCP protocol;

[0007] Step S2: The PLC parses the received tightening instruction to obtain a product model and a product number, and matches the corresponding screw spacing, tightening path, and torque from a database based on the product model;

[0008] Step S3: The PLC adjusts the distance between the two tightening guns via a servo motor based on the screw spacing, and uses a six-axis robot to move the two tightening guns to automatically tighten the screws of the battery pack at the tightening station based on the tightening path and torque.

[0009] Step S4: After the PLC completes tightening of all screws of the battery pack, it generates a tightening report and sends the tightening report to the industrial computer in real time based on the TCP protocol.

[0010] Furthermore, in step S1, the tightening instruction also carries a hash value obtained by hashing the product model and product number; and the tightening instruction is encrypted using a national encryption algorithm before being sent.

[0011] Furthermore, the step S2 is specifically as follows:

[0012] The PLC decrypts the received tightening instruction using the national secret algorithm, parses the tightening instruction to obtain the product model, product number and hash value, performs integrity verification on the product model and product number based on the hash value, and then matches the corresponding screw spacing, tightening path and torque from the database based on the product model.

[0013] Furthermore, the step S3 is specifically as follows:

[0014] Based on the screw spacing, the PLC uses a servo motor to adjust the spacing between the two tightening guns. After locating the tightening holes of the battery pack using machine vision, the six-axis robot moves the two tightening guns to automatically tighten the screws of the battery pack at the tightening station based on the tightening path and torque.

[0015] The step S4 is specifically as follows:

[0016] After the PLC uses machine vision to identify that all screws in the battery pack are tightened, it generates a tightening report containing the product model, product number, screw spacing, tightening path, torque, and tightening time. After encrypting the tightening report using the national encryption algorithm, it is sent to the industrial computer in real time based on the TCP protocol.

[0017] In a second aspect, the present invention provides a battery pack screw automatic tightening system, comprising the following modules:

[0018] The tightening instruction sending module is used by the industrial computer to send tightening instructions carrying product model and product number to the PLC based on the TCP protocol;

[0019] A tightening parameter matching module is used for the PLC to parse the received tightening instruction to obtain the product model and product number, and match the corresponding screw spacing, tightening path and torque from the database based on the product model;

[0020] A screw tightening module is used for the PLC to adjust the distance between two tightening guns through a servo motor based on the screw spacing, and to move the two tightening guns through a six-axis robot to automatically tighten the screws of the battery pack at the tightening station based on the tightening path and torque;

[0021] The tightening report sending module is used to generate a tightening report after the PLC completes the tightening of all screws in the battery pack, and send the tightening report to the industrial computer in real time based on the TCP protocol.

[0022] Furthermore, in the tightening instruction sending module, the tightening instruction also carries a hash value obtained by hashing the product model and product number; and the tightening instruction is encrypted using a national encryption algorithm before being sent.

[0023] Furthermore, the tightening parameter matching module is specifically used to:

[0024] The PLC decrypts the received tightening instruction using the national secret algorithm, parses the tightening instruction to obtain the product model, product number and hash value, performs integrity verification on the product model and product number based on the hash value, and then matches the corresponding screw spacing, tightening path and torque from the database based on the product model.

[0025] Furthermore, the screw tightening module is specifically used for:

[0026] Based on the screw spacing, the PLC uses a servo motor to adjust the spacing between the two tightening guns. After locating the tightening holes of the battery pack using machine vision, the six-axis robot moves the two tightening guns to automatically tighten the screws of the battery pack at the tightening station based on the tightening path and torque.

[0027] The tightening report sending module is specifically used for:

[0028] After the PLC uses machine vision to identify that all screws in the battery pack are tightened, it generates a tightening report containing the product model, product number, screw spacing, tightening path, torque, and tightening time. After encrypting the tightening report using the national encryption algorithm, it is sent to the industrial computer in real time based on the TCP protocol.

[0029] In a third aspect, the present invention provides an automatic tightening device for battery pack screws, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method described in the first aspect when executing the program.

[0030] In a fourth aspect, the present invention provides a battery pack screw automatic tightening medium having a computer program stored thereon, which implements the method described in the first aspect when executed by a processor.

[0031] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0032] 1、Through the industrial computer to the PLC sends carrying product model and product number of tightening instruction, PLC analysis tightening instruction to get product model and product number, based on product model from the database matching corresponding screw pitch, tightening path and torque, based on screw pitch, through the servo motor adjustment two screw gun interval, through the six-axis robot moves two screw gun, based on the tightening path and torque on the battery pack screw tightening station automatic tightening, PLC in the completion of all battery pack screw tightening, generate tightening report and real-time send to the industrial computer; That is, PLC based on screw pitch automatic adjustment screw gun interval to not different product model, without like traditional screw assembly line transformation, or equipped with new screw assembly line, and thus greatly improves the compatibility of battery pack screw tightening.

[0033] 2、Through the national secret algorithm to the tightening instruction and tightening report for decryption, avoid relevant data in the transmission process is plaintext stolen, combined with the integrity check of hash calculation, can quickly judge whether the data is tampered, and thus greatly guarantees the security of data, also avoid based on the wrong data execution tightening operation, greatly improves the safety of screw tightening.

[0034] 3、Through the generation carrying product model, product number, screw pitch, tightening path, torque and tightening time of tightening report and upload industrial computer for archiving, convenient for later traceability.

[0035] 4、Through the setting two screw gun simultaneously on the battery pack screw tightening, greatly improves the screw tightening efficiency.

[0036] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, which can be implemented according to the content of the specification, and in order to let the above and other purposes, characteristics and advantages of the present application can be more obvious and easy to understand, the following specific embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0037] The present application will be further described below with reference to the accompanying drawings and examples.

[0038] Figure 1 It is a circuit principle block diagram of a battery pack screw automatic tightening method of the present application.

[0039] Figure 2 It is a circuit principle block diagram of a battery pack screw automatic tightening system of the present application.

[0040] Figure 3 It is a circuit principle block diagram of a battery pack screw automatic tightening device of the present application.

[0041] Figure 4This is a circuit principle block diagram of a battery pack screw automatic tightening medium of the present invention. DETAILED DESCRIPTION

[0042] The embodiments of the present application provide a method, system, device and medium for automatically tightening battery pack screws, thereby improving the compatibility of tightening battery pack screws.

[0043] The overall idea of ​​the technical solution in the embodiments of the present application is as follows: the PLC automatically adjusts the spacing of the tightening gun based on the screw spacing to suit different product models. There is no need to modify the tightening assembly line or equip a new tightening assembly line as traditionally done to improve the compatibility of battery pack screw tightening.

[0044] Example 1

[0045] This embodiment provides a method for automatically tightening screws of a battery pack. Figure 1 As shown, the following steps are included:

[0046] Step S1: The industrial computer sends a tightening instruction carrying the product model and product number to the PLC based on the TCP protocol. The TCP protocol (Transmission Control Protocol) is a connection-oriented, reliable, byte stream-based transport layer communication protocol. Transmitting the tightening instruction via the TCP protocol can improve the reliability of the tightening instruction transmission.

[0047] Step S2: The PLC parses the received tightening instruction to obtain a product model and a product number, and matches the corresponding screw spacing, tightening path, and torque from a database based on the product model;

[0048] Step S3: The PLC adjusts the distance between the two tightening guns via a servo motor based on the screw spacing to match battery packs of different product models. The six-axis robot moves the two tightening guns to automatically tighten the screws of the battery pack at the tightening station based on the tightening path and torque.

[0049] Step S4: After the PLC completes tightening of all screws of the battery pack, it generates a tightening report and sends the tightening report to the industrial computer in real time based on the TCP protocol.

[0050] In step S1, the tightening instruction also carries a hash value obtained by hashing the product model and product number; the tightening instruction is encrypted using a national encryption algorithm before being sent.

[0051] The tightening instructions and tightening reports are encrypted and decrypted using the national secret algorithm to prevent the relevant data from being stolen in plain text during transmission. Combined with the integrity check of hash calculation, it can quickly determine whether the data has been tampered with, thereby greatly ensuring the security of the data and avoiding tightening operations based on erroneous data, greatly improving the safety of screw tightening.

[0052] The step S2 is specifically as follows:

[0053] The PLC decrypts the received tightening instruction using the national secret algorithm, parses the tightening instruction to obtain the product model, product number and hash value, performs integrity verification on the product model and product number based on the hash value, and then matches the corresponding screw spacing, tightening path and torque from the database based on the product model.

[0054] The step S3 is specifically as follows:

[0055] Based on the screw spacing, the PLC adjusts the spacing between the two tightening guns through a servo motor. After locating the tightening holes of the battery pack through machine vision, the two tightening guns are moved by a six-axis robot to automatically tighten the screws of the battery pack on the tightening station based on the tightening path and torque. During specific implementation, any one tightening gun can be controlled separately to perform the tightening operation, or both tightening guns can be controlled simultaneously to perform the tightening operation. By setting up two tightening guns to tighten the screws of the battery pack at the same time, the screw tightening efficiency is greatly improved.

[0056] The step S4 is specifically as follows:

[0057] After the PLC uses machine vision to identify that all screws in the battery pack are tightened, it generates a tightening report containing the product model, part number, screw spacing, tightening path, torque, and tightening time. This tightening report is encrypted using a national encryption algorithm and sent to the industrial computer in real time over TCP. Generating a tightening report containing the product model, part number, screw spacing, tightening path, torque, and tightening time and uploading it to the industrial computer for archiving facilitates later traceability.

[0058] Example 2

[0059] This embodiment provides a battery pack automatic screw tightening system, such as Figure 2 As shown, it includes the following modules:

[0060] The tightening instruction sending module is used for the industrial computer to send tightening instructions carrying the product model and product number to the PLC based on the TCP protocol. The TCP protocol (Transmission Control Protocol) is a connection-oriented, reliable, byte-stream-based transport layer communication protocol. Transmitting the tightening instructions through the TCP protocol can improve the reliability of the tightening instruction transmission.

[0061] A tightening parameter matching module is used for the PLC to parse the received tightening instruction to obtain the product model and product number, and match the corresponding screw spacing, tightening path and torque from the database based on the product model;

[0062] A screw tightening module is configured to control the PLC to adjust the spacing between two tightening guns via a servo motor based on the screw spacing to match battery packs of different product models, and to automatically tighten the screws of the battery pack at the tightening station based on the tightening path and torque by moving the two tightening guns via a six-axis robot.

[0063] The tightening report sending module is used to generate a tightening report after the PLC completes the tightening of all screws in the battery pack, and send the tightening report to the industrial computer in real time based on the TCP protocol.

[0064] In the tightening instruction sending module, the tightening instruction also carries a hash value obtained by hashing the product model and product number; and the tightening instruction is encrypted using a national encryption algorithm before being sent.

[0065] The tightening instructions and tightening reports are encrypted and decrypted using the national secret algorithm to prevent the relevant data from being stolen in plain text during transmission. Combined with the integrity check of hash calculation, it can quickly determine whether the data has been tampered with, thereby greatly ensuring the security of the data and avoiding tightening operations based on erroneous data, greatly improving the safety of screw tightening.

[0066] The tightening parameter matching module is specifically used for:

[0067] The PLC decrypts the received tightening instruction using the national secret algorithm, parses the tightening instruction to obtain the product model, product number and hash value, performs integrity verification on the product model and product number based on the hash value, and then matches the corresponding screw spacing, tightening path and torque from the database based on the product model.

[0068] The screw tightening module is specifically used for:

[0069] Based on the screw spacing, the PLC adjusts the spacing between the two tightening guns through a servo motor. After locating the tightening holes of the battery pack through machine vision, the two tightening guns are moved by a six-axis robot to automatically tighten the screws of the battery pack on the tightening station based on the tightening path and torque. During specific implementation, any one tightening gun can be controlled separately to perform the tightening operation, or both tightening guns can be controlled simultaneously to perform the tightening operation. By setting up two tightening guns to tighten the screws of the battery pack at the same time, the screw tightening efficiency is greatly improved.

[0070] The tightening report sending module is specifically used for:

[0071] After the PLC uses machine vision to identify that all screws in the battery pack are tightened, it generates a tightening report containing the product model, part number, screw spacing, tightening path, torque, and tightening time. This tightening report is encrypted using a national encryption algorithm and sent to the industrial computer in real time over TCP. Generating a tightening report containing the product model, part number, screw spacing, tightening path, torque, and tightening time and uploading it to the industrial computer for archiving facilitates later traceability.

[0072] Based on the same inventive concept, this application provides an electronic device embodiment corresponding to the first embodiment, see the third embodiment for details.

[0073] Example 3

[0074] This embodiment provides a battery pack automatic screw tightening device, such as Figure 3 As shown, it includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, any implementation method in the first embodiment can be implemented.

[0075] Since the electronic device described in this embodiment is the device used to implement the method in Example 1 of this application, based on the method described in Example 1 of this application, those skilled in the art will be able to understand the specific implementation of the electronic device of this embodiment and its various variations. Therefore, how the electronic device implements the method in the embodiment of this application will not be described in detail here. As long as the device used by those skilled in the art to implement the method in the embodiment of this application falls within the scope of protection to be provided by this application.

[0076] Based on the same inventive concept, this application provides a storage medium corresponding to Example 1, see Example 4 for details.

[0077] Example 4

[0078] This embodiment provides a battery pack screw automatic tightening medium, such as Figure 4 As shown, a computer program is stored thereon, and when the computer program is executed by a processor, any implementation method in Example 1 can be implemented.

[0079] Since the storage medium described in this embodiment is the storage medium used to implement the method in Example 1 of this application, based on the method described in Example 1 of this application, those skilled in the art will be able to understand the specific implementation and various variations of the storage medium of this embodiment, so how the storage medium implements the method in the embodiment of this application will not be described in detail here. As long as those skilled in the art implement the storage medium used in the method in the embodiment of this application, it falls within the scope of protection of this application.

[0080] The technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0081] 1. The industrial computer sends a tightening instruction containing the product model and product number to the PLC. The PLC parses the tightening instruction to obtain the product model and product number, and matches the corresponding screw spacing, tightening path, and torque from the database based on the product model. Based on the screw spacing, the servo motor adjusts the spacing between the two tightening guns, which are moved by a six-axis robot. The screws of the battery pack at the tightening station are automatically tightened based on the tightening path and torque. After tightening all the screws of the battery pack, the PLC generates a tightening report and sends it to the industrial computer in real time. That is, the PLC automatically adjusts the spacing of the tightening guns based on the screw spacing to match different product models. There is no need to modify the tightening assembly line or equip a new tightening assembly line as traditionally done, thereby greatly improving the compatibility of battery pack screw tightening.

[0082] 2. The tightening instructions and tightening reports are encrypted and decrypted using the national secret algorithm to prevent the relevant data from being stolen in plain text during transmission. Combined with the integrity check of hash calculation, it can quickly determine whether the data has been tampered with, thereby greatly ensuring the security of the data and avoiding tightening operations based on erroneous data, greatly improving the safety of screw tightening.

[0083] 3. Generate a tightening report containing product model, product number, screw spacing, tightening path, torque and tightening time and upload it to the industrial computer for archiving, which facilitates traceability in the future.

[0084] 4. By setting up two tightening guns to tighten the screws of the battery pack at the same time, the screw tightening efficiency is greatly improved.

[0085] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0086] The present invention is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products of the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0087] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0088] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0089] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for automatically tightening screws of a battery pack, characterized by: The steps include: Step S1: The industrial computer sends a tightening instruction carrying the product model and product number to the PLC based on the TCP protocol; the tightening instruction also carries a hash value obtained by hashing the product model and product number; the tightening instruction is encrypted using a national secret algorithm before being sent; Step S2: The PLC parses the received tightening instruction to obtain a product model and a product number, and matches the corresponding screw spacing, tightening path, and torque from a database based on the product model; Step S3: The PLC adjusts the distance between the two tightening guns via a servo motor based on the screw spacing, and uses a six-axis robot to move the two tightening guns to automatically tighten the screws of the battery pack at the tightening station based on the tightening path and torque. Step S4: After tightening all the screws of the battery pack, the PLC generates a tightening report and sends the tightening report to the industrial computer in real time based on the TCP protocol. The step S2 is specifically as follows: The PLC decrypts the received tightening instruction using the national secret algorithm, parses the tightening instruction to obtain the product model, product number and hash value, performs integrity verification on the product model and product number based on the hash value, and then matches the corresponding screw spacing, tightening path and torque from the database based on the product model.

2. The automatic tightening method for battery pack screws according to claim 1, characterized in that: The step S3 is specifically as follows: Based on the screw spacing, the PLC uses a servo motor to adjust the spacing between the two tightening guns. After locating the tightening holes of the battery pack using machine vision, the six-axis robot moves the two tightening guns to automatically tighten the screws of the battery pack at the tightening station based on the tightening path and torque. The step S4 is specifically as follows: After the PLC uses machine vision to identify that all screws in the battery pack are tightened, it generates a tightening report containing the product model, product number, screw spacing, tightening path, torque, and tightening time. After encrypting the tightening report using the national encryption algorithm, it is sent to the industrial computer in real time based on the TCP protocol.

3. A battery pack automatic screw tightening system, characterized by: Includes the following modules: The tightening instruction sending module is used for the industrial computer to send a tightening instruction carrying the product model and product number to the PLC based on the TCP protocol; the tightening instruction also carries a hash value obtained by hashing the product model and product number; the tightening instruction is encrypted using the national secret algorithm before being sent; A tightening parameter matching module is used for the PLC to parse the received tightening instruction to obtain the product model and product number, and match the corresponding screw spacing, tightening path and torque from the database based on the product model; A screw tightening module is used for the PLC to adjust the distance between two tightening guns through a servo motor based on the screw spacing, and to move the two tightening guns through a six-axis robot to automatically tighten the screws of the battery pack at the tightening station based on the tightening path and torque; The tightening report sending module is used for the PLC to generate a tightening report after tightening all the screws of the battery pack, and send the tightening report to the industrial computer in real time based on the TCP protocol; The tightening parameter matching module is specifically used for: The PLC decrypts the received tightening instruction using the national secret algorithm, parses the tightening instruction to obtain the product model, product number and hash value, performs integrity verification on the product model and product number based on the hash value, and then matches the corresponding screw spacing, tightening path and torque from the database based on the product model.

4. The automatic battery pack screw tightening system according to claim 3, characterized in that: The screw tightening module is specifically used for: Based on the screw spacing, the PLC uses a servo motor to adjust the spacing between the two tightening guns. After locating the tightening holes of the battery pack using machine vision, the six-axis robot moves the two tightening guns to automatically tighten the screws of the battery pack at the tightening station based on the tightening path and torque. The tightening report sending module is specifically used for: After the PLC uses machine vision to identify that all screws in the battery pack are tightened, it generates a tightening report containing the product model, product number, screw spacing, tightening path, torque, and tightening time. After encrypting the tightening report using the national encryption algorithm, it is sent to the industrial computer in real time based on the TCP protocol.

5. A battery pack automatic screw tightening device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the method according to any one of claims 1 to 2 is implemented.

6. A battery pack screw automatic tightening medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 2 is implemented.

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