Testing device for BMS assembly in electric box

Abstract

The invention relates to the technical field of measurement, in particular to a testing device for a BMS assembly in an electric box. According to the scheme, the test instruction is automatically output through the calculation processing device, automation of the test process is achieved, manual operation steps are greatly reduced, the test efficiency is improved, and the test time is shortened. And the serial server is used for connecting the data acquisition module and the power supply module, so that the testing device can easily adapt to different types of electric boxes and BMS components, and the universality and flexibility of the testing device are improved. And the serial port server is used for data transmission and control instruction sending, so that electrical potential safety hazards caused by improper physical connection are reduced, and the safety of the test process is ensured. Besides, due to the design of the protocol conversion module and the interface expansion module of the device, the testing device can be easily integrated into an existing power system monitoring network, and meanwhile, the possibility is provided for future function expansion.

Description

Technical Field

[0001] The present invention relates to the field of measurement technology, and particularly to a test device for BMS components in an electrical box. Background Art

[0002] In a modern power system, the battery management system (BMS) component is a key part to ensure the safe and efficient operation of the battery pack. The BMS component is usually installed in an electrical box and is responsible for monitoring and managing the charging and discharging process of the battery pack to prevent potential dangers such as overcharging, over-discharging, and overheating. However, the performance test and diagnosis of the BMS component are a challenge in the maintenance of the power system because traditional test methods often have problems such as complex operation, low test efficiency, and low safety.

[0003] Currently, the following technical solutions are mainly adopted for testing BMS components in an electrical box: Technicians manually connect test instruments to the BMS component to measure parameters such as voltage and current. This method has complex operation, is prone to errors, and the test results are greatly affected by human factors.

[0004] Some test devices are connected to the BMS component through fixed interfaces for automated testing. However, these devices usually can only be used for specific models of electrical boxes and BMS components, lacking universality and flexibility.

[0005] To solve the above problems, it is necessary to develop a new type of BMS component test device. Summary of the Invention

[0006] To solve the above problems, the present invention discloses a test device for BMS components in an electrical box.

[0007] To achieve the above object, a test device for BMS components in an electrical box includes: a computing and processing device, a data acquisition module, and a power supply module. The data acquisition module and the power supply module are respectively connected to a serial server and communicate with the computing and processing device through the serial server. The computing and processing device is configured to output a test instruction to the serial server according to a test strategy, control the power supply module to output a corresponding test voltage and current through the serial server, receive test data from the data acquisition module, and calculate and output a test result according to the test data. The serial server includes a protocol conversion module and an interface expansion module. The protocol conversion module is used for conversion processing of communication data, and the interface expansion module is used for connecting the data acquisition module.

[0008] In a possible implementation, the test device further includes a wireless test component, which includes a receiving coil and a first communication module preset in the electrical box to be tested, and a transmitting coil and a second communication module communicatively connected to the serial port server. The receiving coil is connected to the component to be tested through a switch control unit, and the first communication module is communicatively connected to the electrical box control unit for communicating with the second communication module and transmitting test data and control instructions.

[0009] Both the first communication module and the second communication module are carrier communication modules.

[0010] Among them, the wireless test component further includes a current and voltage detection module and a parameter adjustment module arranged in the electrical box to be tested. The current and voltage detection module is connected to the receiving coil for real-time monitoring of the current and voltage at the receiving end and transmitting feedback data to the second communication module through the first communication module. The parameter adjustment module is used to adjust the output parameters of the transmitting coil according to the feedback data according to a preset algorithm and detection strategy.

[0011] The switch control unit is further configured to return a detection response message to the calculation and processing device according to a detection request from the calculation and processing device, and carry its hardware identification information in the detection response message. When the calculation and processing device successfully verifies the hardware identification information, it issues detection strategy information to the parameter adjustment module, and the parameter adjustment module executes a detection process according to the detection strategy information.

[0012] The hardware identification information is encrypted through a transmission key, and the transmission key is a key paired between the switch control unit and the calculation and processing device.

[0013] The transmission key is a random number key, and the hardware identification information is encrypted by means of exclusive OR when encrypted.

[0014] A positioning structure for positioning and cooperating with the transmitting coil is arranged on the outer side of the electrical box to be tested.

[0015] The positioning structure includes a plurality of magnetic attraction structures arranged on the outer side of the electrical box to be tested, and the transmitting coil is adsorbed and fixed through the magnetic attraction structures when it is in alignment and cooperation with the receiving coil.

[0016] The solution of this application automatically outputs test instructions through a computing processing device, realizing the automation of the test process, greatly reducing the manual operation steps, improving the test efficiency, and shortening the test time. By using a serial server to connect the data acquisition module and the power supply module, it can easily adapt to different models of electrical boxes and BMS components, improving the versatility and flexibility of the test device. Using a serial server for data transmission and sending control instructions reduces the electrical safety hazards caused by improper physical connections and ensures the safety of the test process. In addition, the design of the protocol conversion module and interface expansion module of this device enables the test device to be easily integrated into the existing power system monitoring network and also provides the possibility for future function expansion. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of a test device in an embodiment of this application; Figure 2 It is a schematic diagram of the overall structure of the BMS component test device in an embodiment of this application; Figure 3 It is a flowchart of the operation of the switch control unit in an embodiment of this application. Detailed Embodiments

[0018] To make the invention purpose, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention. The principles and features of the present invention are described below in conjunction with the drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0019] The term "including" and other similar expressions in the specification or claims of the present invention and the above-mentioned drawings mean covering non-exclusive inclusion. For example, a process, method, system, or device including a series of steps or units is not limited to the listed steps or units.

[0020] Embodiment: A test device for BMS components in an electrical box includes: a computing processing device, a data acquisition module, and a power supply module. The data acquisition module and the power supply module are respectively connected to a serial server and communicate with the computing processing device through the serial server; The computing processing device is used to output test instructions to the serial server according to the test strategy, control the power supply module to output corresponding test voltages and currents through the serial server, receive test data from the data acquisition module, and calculate and output test results according to the test data; The serial port server includes a protocol conversion module and an interface expansion module. The protocol conversion module is used for the conversion and processing of communication data, and the interface expansion module is used to connect to the data acquisition module.

[0021] As Figure 1 shown, in a possible implementation, the test device specifically includes: An industrial control computer 100, as a computing and processing device, for human-computer interaction; An Ethernet switch 101: for network data transmission and switching, used to connect two serial port servers; A USB switch 102: for USB data transmission and switching, used to connect a barcode scanner and a status indicator light; Serial port servers: including a first serial port server 201 and a second serial port server 202. Both servers include MoudbusTCP-RTU protocol conversion and port expansion, and are used to connect to other measurement modules; CAN converters: including a first CAN converter 211 and a second CAN converter 212. Both converters include MoudbusRTU-CANFD protocol conversion, and are used to connect the internal and external CAN ports of the electrical box to be tested; A digital voltage source 213: used to output test voltage and current; A digital current source 214: used to output test voltage and current; An ohmmeter 215: used to test the loop internal resistance; An AC voltmeter 216: used to detect the working voltage of the test machine; A DC voltmeter 223: used to detect the output voltage DC24V of the test machine's switching power supply (for self-check); A temperature sensor 218: used to detect the ambient temperature; An air velocity sensor 217: used to detect the start / stop state of the air velocity; A digital IO module 221: used to control a relay for loop switching; An analog IO module 222: reserved; A barcode scanner 121: used to read the device ID and shunt calibration; An indicator light 122: used for visual output of the test machine status (red, green, yellow three colors); Taking the detection of the main positive relay control of the distribution box as an example, during specific testing, simulate the message CANID0X702, and the Tester sends 0C00000000000000; 2 frames to close the main positive relay: Read CANID: 0x301, where MainPosRelay_Fb_Sts = 1 (closed) Obtain the detection result by reading the status of the auxiliary contact. In a possible implementation, the test device further includes a wireless test component. The wireless test component includes a receiving coil and a first communication module pre - installed in the electrical box to be tested, as well as a transmitting coil and a second communication module communicatively connected to the serial port server. The receiving coil is connected to the component to be tested through a switch control unit. The first communication module is communicatively connected to the electrical box control unit, and is used to communicate with the second communication module and transmit test data and control instructions.

[0022] Both the first communication module and the second communication module are carrier communication modules.

[0023] In the above solution, the receiving coil is located inside the electrical box to be tested and is used to receive signals from the transmitting coil. The first communication module (carrier communication module), connected to the receiving coil, is responsible for processing the received signals and communicating with the electrical box control unit. The transmitting coil, connected to the serial port server, is used to cooperate with the receiving coil according to the detection strategy and output corresponding detection voltage and current to the component to be tested. The second communication module sends a start signal to the transmitting coil, and the transmitting coil starts to generate an alternating magnetic field. After the receiving coil senses the alternating magnetic field, it generates detection voltage and current, and these voltage and current are applied to the component to be tested through the switch control unit. According to the specific requirements of the component to be tested, the output parameters of the transmitting coil can be adjusted through the second communication module to obtain appropriate detection voltage and current. Under the action of the detection voltage and current, the response (such as voltage, current, impedance, etc.) of the component to be tested is collected by the first communication module. The first communication module sends the collected data to the second communication module through carrier communication. After receiving the data, the second communication module can send it to the serial port server for further processing and analysis.

[0024] Through the cooperation of the transmitting coil and the receiving coil, non - contact voltage and current output to the component to be tested is achieved, reducing the wear and risks that may be brought by physical contact. The first communication module can collect the response data of the component to be tested in real time and transmit it through the second communication module, enabling the tester to timely understand the test status and make corresponding adjustments. By using carrier communication technology, data can be transmitted on the existing power lines without additional wiring, improving the convenience and efficiency of communication. Through wireless communication, remote monitoring of the electrical box to be tested can be realized, especially in dangerous or inaccessible environments, improving the safety and operability of the test.

[0025] Among them, the wireless test component further includes a current-voltage detection module and a parameter adjustment module disposed in the electrical box to be tested. The current-voltage detection module is connected to the receiving coil and is used to monitor the current and voltage at the receiving end in real time, and transmit the feedback data to the second communication module through the first communication module. The parameter adjustment module is used to adjust the output parameters of the transmitting coil according to the feedback data according to a preset algorithm and a detection strategy.

[0026] The parameter adjustment module analyzes the response characteristics of the component to be tested according to the feedback data transmitted by the current-voltage detection module. According to the preset algorithm and the detection strategy, it adjusts the output parameters of the transmitting coil, such as frequency, amplitude, etc., to optimize the detection effect.

[0027] The parameter adjustment module receives the feedback data from the current-voltage detection module. Analyze the data according to the preset algorithm and make a decision on whether to adjust the output parameters of the transmitting coil.

[0028] If adjustment is required, the parameter adjustment module controls the transmitting coil through the second communication module to change its output parameters.

[0029] Through real-time monitoring and feedback adjustment, the output of the transmitting coil can be precisely controlled to ensure that the component to be tested is detected under the best conditions. The parameter adjustment module can automatically adjust the detection parameters according to the actual response of the component to be tested, improving the adaptability and flexibility of the detection.

[0030] The switch control unit is further configured to return a detection response message to the calculation and processing device according to the detection request from the calculation and processing device, and carry its hardware identification information in the detection response message. When the calculation and processing device successfully verifies the hardware identification information, it issues detection strategy information to the parameter adjustment module, and the parameter adjustment module executes the detection process according to the detection strategy information.

[0031] The switch control unit receives the detection request from the calculation and processing device. After receiving the detection request, the switch control unit returns a detection response message to the calculation and processing device. In the detection response message, the switch control unit will carry its unique hardware identification information for device identification and verification.

[0032] As Figure 3 shown, in a specific solution, the above process includes: S101: The calculation and processing device sends a detection request to the switch control unit according to the need; S102: After receiving the detection request, the switch control unit returns a detection response message and carries the hardware identification information in the message; S103: The calculation and processing device verifies the hardware identification information in the detection response message; S104: After successful verification, the computing and processing device sends the detection strategy information to the parameter adjustment module; S105: The parameter adjustment module adjusts the output parameters of the transmitting coil according to the received detection strategy information, and controls the current and voltage detection module to execute the detection process.

[0033] Through the verification of the hardware identification information, it is ensured that the computing and processing device communicates with the correct switch control unit, improving the security of the system. The computing and processing device can send different detection strategies according to different detection requirements, making the detection process more flexible and customized.

[0034] The hardware identification information is encrypted by a transmission key, and the transmission key is the key paired between the switch control unit and the computing and processing device.

[0035] The transmission key is a random number key, and the hardware identification information is encrypted by the XOR method when encrypted.

[0036] The transmission key is a random number key, which is generated when the switch control unit and the computing and processing device establish communication.

[0037] This key is paired between the two devices in a secure manner, ensuring that only these two devices know the key.

[0038] When the switch control unit needs to send the hardware identification information, it encrypts the hardware identification information using the transmission key.

[0039] By encrypting the hardware identification information using the transmission key, the security of the information during transmission is ensured, preventing the information from being stolen or tampered with. XOR encryption is an efficient encryption method because it only requires simple bit operations and does not require complex algorithms, thus reducing the processing time and resource consumption. Using a random number key increases the difficulty of cracking because different keys may be used for each communication. By encrypting the hardware identification information, the computing and processing device can verify the identity of the switch control unit, ensuring the authenticity of the identities of both communication parties.

[0040] A positioning structure for positioning and mating with the transmitting coil is provided on the outer side of the electric box to be measured.

[0041] The positioning structure includes a plurality of magnetic attraction structures provided on the outer side of the electric box to be measured, and the transmitting coil is adsorbed and fixed through the magnetic attraction structures when the transmitting coil and the receiving coil are aligned and mated.

[0042] When the transmitting coil needs to be aligned and mated with the receiving coil, the magnetic attraction structure is used to firmly adsorb the transmitting coil at the specified position of the electric box to be measured.

[0043] This adsorption and fixation method ensures the relative position stability between the transmitting coil and the receiving coil, thus guaranteeing the efficiency and accuracy of wireless transmission.

[0044] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A testing device for BMS components in an electrical box, characterized in that: include: A computing and processing device, a data acquisition module and a power supply module, wherein the data acquisition module and the power supply module are respectively connected to a serial port server and are communicatively connected to the computing and processing device via the serial port server; The computing and processing device is used to output a test instruction to the serial port server according to the test strategy, control the power supply module to output a corresponding test voltage and current through the serial port server, receive the test data from the data acquisition module, and calculate and output the test result according to the test data; The serial port server includes a protocol conversion module and an interface expansion module, wherein the protocol conversion module is used for conversion processing of communication data, and the interface expansion module is used for connecting to the data acquisition module; The test device also includes a wireless test component, which includes a receiving coil and a first communication module preset in the electrical box to be tested, and a transmitting coil and a second communication module connected to the serial port server for communication. The receiving coil is connected to the component to be tested via a switch control unit, and the first communication module is connected to the electrical box control unit for communication with the second communication module and transmission of test data and control instructions.

2. The testing device according to claim 1, characterized in that: The first communication module and the second communication module are both carrier communication modules.

3. The testing device according to claim 2, characterized in that: The wireless test component also includes a current and voltage detection module and a parameter adjustment module arranged in the electrical box to be tested. The current and voltage detection module is connected to the receiving coil and is used to monitor the current and voltage of the receiving end in real time, and transmit the feedback data to the second communication module through the first communication module. The parameter adjustment module is used to adjust the output parameters of the transmitting coil according to the preset algorithm and detection strategy based on the feedback data.

4. The testing device according to claim 3, characterized in that: The switch control unit is further used to return a detection response message to the computing and processing device according to a detection request from the computing and processing device, and carry its hardware identification information in the detection response message. When the computing and processing device successfully verifies the hardware identification information, the computing and processing device sends detection strategy information to the parameter adjustment module, and the parameter adjustment module executes the detection process according to the detection strategy information.

5. The testing device according to claim 4, characterized in that: The hardware identification information is encrypted by a transmission key, and the transmission key is a key for pairing between the switch control unit and the computing and processing device.

6. The testing device according to claim 5, characterized in that: The transmission key is a random number key, and the encryption process is performed by an XOR method when encrypting the hardware identification information.

7. The testing device according to claim 3, characterized in that: A positioning structure that cooperates with the transmitting coil is arranged on the outer side of the electric box to be tested.

8. The testing device according to claim 7, characterized in that: The positioning structure includes a plurality of magnetic structures arranged on the outside of the electrical box to be tested, and the transmitting coil and the receiving coil are fixed by adsorption through the magnetic structures when they are aligned and matched.

Images