Automatic switching device and system for multiple test devices

Abstract

The utility model discloses an automatic switching device and system for multiple test devices, the device comprises a control module, a device switching module, a first communication module and a second communication module, the control module is electrically connected with the device switching module, the device switching module is electrically connected with the first communication module, and the second communication module is electrically connected with the second communication module. A plurality of interfaces of the first communication module are electrically connected with a plurality of test devices in a one-to-one correspondence manner, each test device is electrically connected with a to-be-tested device, and the to-be-tested device is electrically connected with the control module through the second communication module; wherein the equipment switching module comprises a plurality of working conditions, and under each working condition, the control module is connected with one test equipment through the equipment switching module and the first communication module. According to the utility model, through channel switching of the device switching module, automatic switching of different testing devices is realized, complexity and errors of manual operation are effectively reduced, testing efficiency and testing accuracy of the to-be-tested device are improved, and smoothness of a testing process is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of test tooling, and particularly relates to an automatic switching device and system for multiple test devices. Background Technique

[0002] With the rapid growth of the intelligent product market, its test items have become increasingly complex, and the test requirements for the functions, performances and safety of intelligent products have become increasingly prominent. Each intelligent product needs to be tested for its functions, performances and safety during design and production.

[0003] Different intelligent products use different test devices for functional testing, performance testing, etc. The traditional product testing method is that for which functional test is to be carried out, the staff manually connect the corresponding test device. After this test is completed, the staff manually disconnect this test device and connect a new test device. This traditional manual switching method of test devices not only has low test efficiency, but also easily causes incorrect connection of test devices. Content of the Utility Model

[0004] In view of this, the utility model provides an automatic switching device and system for multiple test devices, mainly aiming to solve the problems of low test efficiency and easy incorrect connection of test devices caused by the current manual switching of test devices.

[0005] To solve the above problems, the present application provides an automatic switching device for multiple test devices. The automatic switching device for multiple test devices includes a control module, a device switching module, a first communication module and a second communication module. Among them, the control signal output end of the control module is electrically connected to the control signal input end of the device switching module, the first data transceiver end of the control module is electrically connected to the first data end of the device switching module, the second data end of the device switching module is electrically connected to the first communication module, multiple interfaces of the first communication module are respectively electrically connected to multiple test devices one by one, the output end of each test device is respectively electrically connected to the power input end of the device under test, and the data communication end of the device under test is electrically connected to the second data transceiver end of the control module through the second communication module; among them, the device switching module includes multiple working conditions, and in each working condition, the control module is connected to a test device through the device switching module and the first communication module.

[0006] In an embodiment of the present utility model, optionally, the device switching module includes a serial communication unit, an isolation unit, and a channel switching unit. Among them, the first data transceiver of the serial communication unit is electrically connected to the first serial port data transceiver of the control module, the second data transceiver of the serial communication unit is electrically connected to the first data end of the isolation unit, the second data end of the isolation unit is electrically connected to the first data end of the channel switching unit, the second data end of the channel switching unit is electrically connected to the first communication module, and the control signal input end of the channel switching unit is electrically connected to the control signal output end of the control module.

[0007] In an embodiment of the present utility model, optionally, the serial communication unit is a first serial communication chip, the isolation unit is an isolation chip, and the channel switching unit includes a first analog switch chip and a second analog switch chip. Among them, the first data transceiver of the first serial communication chip is electrically connected to the first serial port data transceiver of the control module, the second data transceiver of the first serial communication chip is electrically connected to the first data end and the second data end of the isolation chip respectively, the third data end of the isolation chip is electrically connected to the common end of the first analog switch chip, the fourth data end of the isolation chip is electrically connected to the common end of the second analog switch chip, multiple data ends of the first analog switch chip and multiple data ends of the second analog switch chip are electrically connected to the first communication module respectively, and the control signal input ends of the first analog switch chip and the second analog switch chip are both electrically connected to the control signal output end of the control module.

[0008] In an embodiment of the present utility model, optionally, the first communication module includes multiple serial ports. Among them, the two serial port data ends of each serial port are electrically connected to a data end of the first analog switch chip and a data end of the second analog switch chip respectively, and each serial port is electrically connected to the communication port of a test device through a serial data line.

[0009] In an embodiment of the present utility model, optionally, the second communication module communicates with the device under test and the control module through the RS232 communication protocol, the RS485 communication protocol, or the CAN bus communication protocol.

[0010] In an embodiment of the present utility model, optionally, the automatic switching device for multiple test devices further includes a display module, and the data input end of the display module is electrically connected to the display data output end of the control module.

[0011] In an embodiment of the present utility model, optionally, the communication conversion module includes a USB conversion chip and a second serial port communication chip. Among them, the USB data terminal of the USB conversion chip is electrically connected to the USB interface of the computer, the serial port data terminal of the USB conversion chip is electrically connected to the first data transceiver terminal of the second serial port communication chip, and the second data transceiver terminal of the second serial port communication chip is electrically connected to the second serial port data transceiver terminal of the control module.

[0012] In an embodiment of the present utility model, optionally, the automatic switching device for multiple test devices further includes a power supply module. The power supply module includes a power input interface, a power conversion chip, and an output interface. Among them, the power input interface is electrically connected to a power supply providing terminal, the power input interface is also electrically connected to the input terminal of the power conversion chip, the output terminal of the power conversion chip is electrically connected to the output interface, and the output interface is electrically connected to the power input terminal of the control module, the power input terminal of the device switching module, and the power input terminal of the first communication module.

[0013] In an embodiment of the present utility model, optionally, the automatic switching device for multiple test devices further includes an alarm module. The input terminal of the alarm module is electrically connected to the alarm signal output terminal of the control module.

[0014] The present utility model also provides an automatic switching system for multiple test devices, including multiple test devices and the above-mentioned automatic switching device for multiple test devices.

[0015] For the automatic switching device and system for multiple test devices provided by the present utility model, the device switching module can switch different channels. When one channel is connected, the control module and a test device are connected through the channel connected by the device switching module. Data interaction between the control module and the test device is realized through the first communication module connected to the test device. The test device tests the device under test. Through the channel switching of the device switching module, automatic switching of different test devices is realized, effectively reducing the complexity and error of manual operation, improving the test efficiency of the device under test, improving the accuracy of the connection of the test device, and also greatly improving the smoothness and accuracy of the test process.

[0016] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the present utility model more obvious and understandable, the specific embodiments of the present utility model are specifically given below. Description of the Drawings

[0017] Various other advantages and benefits will become clear to those of ordinary skill in the art by reading the following detailed description of the preferred embodiments. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0018] Figure 1 is a structural block diagram of an automatic switching device for a multi-test equipment according to an exemplary embodiment of the present utility model;

[0019] Figure 2 is a circuit structure diagram of an equipment switching module of an automatic switching device for a multi-test equipment according to an exemplary embodiment of the present utility model;

[0020] Figure 3 is a structure diagram of multiple serial port interfaces of a first communication module of an automatic switching device for a multi-test equipment according to an exemplary embodiment of the present utility model;

[0021] Figure 4 is a connection block diagram when testing with a lithium battery as an example for an automatic switching device for a multi-test equipment according to an exemplary embodiment of the present utility model;

[0022] Figure 5 is a circuit structure diagram of a control module when testing with a lithium battery as an example for an automatic switching device for a multi-test equipment according to an exemplary embodiment of the present utility model;

[0023] Among them,

[0024] Figures 1 - 5 the reference numerals are as follows: 11 - control module; 12 - equipment switching module; 13 - first communication module; 14 - second communication module; 20 - test equipment; 30 - equipment under test. Detailed Embodiments

[0025] The present utility model will be described in detail below with reference to the drawings and in conjunction with the embodiments. It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0026] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following, in conjunction with the drawings and preferred embodiments, details the specific embodiments, structures, features, and their effects according to the application of the present utility model. In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0027] The following, in conjunction with Figures 1 to 5Describe an automatic switching device for multiple test devices according to some embodiments of the present utility model.

[0028] In one embodiment, as Figure 1 shown, an automatic switching device for multiple test devices includes a control module 11, a device switching module 12, a first communication module 13, and a second communication module 14. Among them, the control signal output end of the control module 11 is electrically connected to the control signal input end of the device switching module 12, the first data transceiver end of the control module 11 is electrically connected to the first data end of the device switching module 12, the second data end of the device switching module 12 is electrically connected to the first communication module 13, multiple interfaces of the first communication module 13 are respectively and electrically connected to multiple test devices 20 one by one, the output end of each test device 20 is respectively and electrically connected to the power input end of the device under test 30, and the data communication end of the device under test 30 is electrically connected to the second data transceiver end of the control module 11 through the second communication module 14; among them, the device switching module 12 includes multiple working conditions. Under each working condition, the control module 11 is connected to a test device through the device switching module 12 and the first communication module.

[0029] Specifically, the device switching module is connected to the first communication module. There are many communication connection ports on the first communication module. Each test device is connected to a communication connection port on the first communication module. The control module sends a channel selection control signal to the device switching module. The device switching module makes the corresponding channel connected according to the channel selection control signal, so that the control module is connected to a test device through the connected channel and the first communication module. The control module sends an opening instruction to the test device, and the test device conducts a test. The test device sends the data generated during the test to the control module through the first communication module. At the same time, the control module obtains the data generated by the product under test during the test through the second communication module. When the test of this test device is successful, the control module sends a new channel selection control signal, and the new channel in the device switching module is connected, so that the control module is connected to another test device. The control module sends an opening instruction to another test device, and this test device conducts a test on the product under test. The automatic switching of multiple test devices is realized through the control module and the device switching module. The number of test devices that can be connected is equal to the number of channels of the device switching module.

[0030] As the core of the automatic switching device, the control module is responsible for setting test items, calling the standards of the product under test, selecting the instrument communication type, and real-time displaying the current test status and results. Taking a lithium battery as the product under test as an example, test instruments (such as DC power supply, electronic load meter, internal resistance tester, etc.) are used. The communication ports of the required test instruments are uniformly connected to the relevant communication ports of the first communication module. The control module outputs a channel selection control signal to the device switching module, enabling the control module to communicate with the test instrument. Based on the communication information with the test instrument, the control module issues stop or start test instructions, greatly improving the test efficiency and accuracy.

[0031] The control module also has data processing and analysis functions, providing users with the convenience of in-depth analysis and research of test results. Through a variety of data processing means, users can more comprehensively understand the performance characteristics of the product under test, providing strong support for subsequent improvement and optimization.

[0032] In this embodiment, it should be noted that the functions implemented by the control module can be realized by programs in the prior art. The technical effects achieved by this application mainly rely on the connection relationships between the modules.

[0033] Compared with the prior art, the automatic switching device for multiple test devices provided by the present utility model has a device switching module that can switch different channels. When one channel is connected, the control module and a test device are connected through the channel connected by the device switching module. Data interaction between the control module and the test device is achieved through the first communication module connected to the test device. The test device tests the device under test. Through the channel switching of the device switching module, automatic switching of different test devices is realized, effectively reducing the complexity and errors of manual operations, improving the test efficiency of the device under test, improving the accuracy of the connection of the test device, and also greatly improving the smoothness and accuracy of the test process.

[0034] In one embodiment, the device switching module 12 includes a serial communication unit, an isolation unit, and a channel switching unit. Among them, the first data transceiver of the serial communication unit is electrically connected to the first serial port data transceiver of the control module, the second data transceiver of the serial communication unit is electrically connected to the first data end of the isolation unit, the second data end of the isolation unit is electrically connected to the first data end of the channel switching unit, the second data end of the channel switching unit is electrically connected to the first communication module, and the control signal input end of the channel switching unit is electrically connected to the control signal output end of the control module.

[0035] Specifically, the first communication module supports the serial communication protocol or the CAN bus communication protocol. Here, the serial communication protocol is taken as an example to introduce the circuit structure of the first communication module. The channel switching unit connects the corresponding channel according to the channel selection control signal of the control module. After receiving the serial data of the control module, the serial communication unit realizes signal isolation through the isolation unit. The signal passing through the isolation unit is sent to the channel switching unit. The serial data received by the serial communication unit is transmitted to the test device through the connected channel in the channel switching unit and the first communication module.

[0036] The test device obtains the data generated during the test and transmits it to the isolation chip through the first communication module and the connected channel. The isolation chip sends the data to the control module, enabling the control module to determine whether the test is successful based on the test data generated by the test device.

[0037] In one embodiment, the serial communication unit is the first serial communication chip, the isolation unit is the isolation chip, and the channel switching unit includes the first analog switch chip and the second analog switch chip. Among them, the first data transceiver terminal of the first serial communication chip is electrically connected to the first serial data transceiver terminal of the control module. The second data transceiver terminal of the first serial communication chip is respectively electrically connected to the first data terminal and the second data terminal of the isolation chip. The third data terminal of the isolation chip is electrically connected to the common terminal of the first analog switch chip. The fourth data terminal of the isolation chip is electrically connected to the common terminal of the second analog switch chip. The multiple data terminals of the first analog switch chip and the multiple data terminals of the second analog switch chip are respectively electrically connected to the first communication module, and the control signal input terminals of the first analog switch chip and the second analog switch chip are both electrically connected to the control signal output terminal of the control module.

[0038] Specifically, as Figure 2 shown, U6 is the isolation chip, and U7 and U8 are analog switch chips (also called multiplexer switch chips), which have three binary control inputs A, B, and C and a disable input. These three binary signals select one of the 8 channels to be opened and connect one of the 8 inputs to the output. The multiplexer switch chip is a digitally controlled analog switch with low on-resistance and very low OFF leakage current. These multiplexer circuits consume extremely low static power over the entire VDD - VSS and VDD - VEE supply voltage ranges, regardless of the logic state of the control signal. When a logic 1 exists on the disable input terminal, all channels are closed.

[0039] In one embodiment, the first communication module 13 includes a plurality of serial ports. Among them, the two serial data terminals of each serial port are respectively and electrically connected to a data terminal of the first analog switch chip and a data terminal of the second analog switch chip, and each serial port is electrically connected to a communication port of a test device 20 through a serial data line.

[0040] Specifically, as Figure 3 shown, the first communication module includes a plurality of serial ports. The serial transmit data terminal of each serial port is connected to a data terminal of the first analog switch chip, the serial receive data terminal of each serial port is connected to a data terminal of the second analog switch chip, and each serial port is connected to a communication port of a test device through a serial data line, so as to realize the communication connection between the control module and a test device when one channel of the device switching module is connected.

[0041] In one embodiment, the second communication module 14 communicates with the device under test 30 and the control module 11 through the RS232 communication protocol, the RS485 communication protocol or the CAN bus communication protocol.

[0042] Specifically, the communication between the product under test and the control module supports RS232 communication, RS485 communication or CAN bus communication, and the appropriate communication protocol is used according to requirements.

[0043] In one embodiment, taking the lithium battery test as an example, the second communication module is used to stably connect to the communication port of the lithium battery pack, aiming to build an effective communication bridge between the lithium battery pack and the control module. During this communication process, the lithium battery pack collects key battery parameter information, including voltage, current, and voltage difference, etc., and then this information will be accurately transmitted to the main control module through the second communication module.

[0044] In one embodiment, the automatic switching device for multiple test devices further includes a display module, and the data input terminal of the display module is electrically connected to the display data output terminal of the control module.

[0045] Specifically, the display module can be a touch screen or a separate display screen. After the control module obtains the monitoring data of the test device and the monitoring data of the product under test, it analyzes these data to obtain an analysis result, and transmits the analysis result to the display module, so that the staff can intuitively obtain the test result and improve the test efficiency.

[0046] In one embodiment, when the display module is a touch screen, the control module and the touch screen are combined as a control and display module. The control and display module serves as the center of the system, responsible for setting test items, calling the standards of the product under test, selecting the instrument communication type, and real-time displaying the current test status and results.

[0047] In one embodiment, the automatic switching device for multiple test devices further includes a communication conversion module, which includes a USB conversion chip and a second serial communication chip. Specifically, the USB data terminal of the USB conversion chip is electrically connected to the USB interface of the computer, the serial data terminal of the USB conversion chip is electrically connected to the first data transceiver terminal of the second serial communication chip, and the second data transceiver terminal of the second serial communication chip is electrically connected to the second serial data transceiver terminal of the control module.

[0048] Specifically, the automatic switching device further includes a host computer, which sends instructions to the control module, and the control module starts testing according to the instructions. The host computer is connected to the control module through a USB-to-serial module for data transmission.

[0049] The interface of the automatic switching device adopts a standard interface design, supporting communication between USB and the PC host computer, as well as communication between RS232, RS485, CAN interfaces and test instruments or products under test, facilitating communication and data transmission with the automatic switching device. Each test instrument interface is equipped with an independent data interface line and uses an isolated power supply module and a digital signal isolation chip circuit to ensure stable and reliable data transmission during the test process, further improving the accuracy of the test.

[0050] In one embodiment, the automatic switching device for multiple test devices further includes a power supply module, which includes a power input interface, a power conversion chip and an output interface. Specifically, the power input interface is electrically connected to the power supply terminal, the power input interface is also electrically connected to the input terminal of the power conversion chip, the output terminal of the power conversion chip is electrically connected to the output interface, and the output interface is electrically connected to the power input terminal of the control module, the power input terminal of the device switching module, and the power input terminal of the first communication module.

[0051] Specifically, the power supply module provides power for the control module, the device switching module and the first communication module.

[0052] In one embodiment, the automatic switching device for multiple test devices further includes an alarm module, and the input terminal of the alarm module is electrically connected to the alarm signal output terminal of the control module.

[0053] Specifically, when the control module monitors that the data of the test device or the product under test exceeds the preset value, or analyzes based on this data and the analysis result is unqualified, the control module sends an alarm signal to the alarm module, and the alarm module executes the alarm. The alarm module can be a buzzer or a fault indicator light.

[0054] The present utility model also provides an automatic switching system for multiple test devices, including multiple test devices and the above-mentioned automatic switching device for multiple test devices.

[0055] The automatic switching system for multiple test devices provided by the present utility model. The device switching module can switch different channels. When one channel is connected, the control module and a test device are connected through the channel connected by the device switching module. Data interaction between the control module and the test device is realized through the first communication module connected to the test device. The test device tests the device under test. Through the channel switching of the device switching module, automatic switching of different test devices is achieved, effectively reducing the complexity and errors of manual operations, improving the test efficiency of the device under test, enhancing the accuracy of the connection of the test device, and also greatly improving the smoothness and accuracy of the test process.

[0056] In one embodiment, taking the lithium battery test as an example, the staff selects the lithium battery to be tested and the test items through the control interface (host computer). The control interface sends the user's selection to the control module. The control module determines the test instrument to be used according to the user's selection, generates corresponding test instructions and channel control instructions, and sends the channel control instructions to the device switching module, so that the device switching module switches the channel according to the channel control instructions. The control module sends the test instructions to the corresponding test instrument, and the test instrument conducts the test. During the test, the test instrument sends the data generated during the test to the control module through the first communication module, and the product under test sends the data generated during the test to the control module through the second communication module. The control module can monitor the status of the lithium battery and the status of the test instrument in real time, conduct comparison and analysis based on the reported data, and make corresponding judgments based on the comparison results. This process ensures that the working status of the lithium battery pack can be monitored in real time and accurately evaluated. The control module automatically switches the test instrument according to the actual situation. After the test is completed, the control module displays the test results to the user through the control interface and provides corresponding data processing and analysis functions.

[0057] Throughout the test process, the control module always maintains strict monitoring of the status of the product under test and the status of the test instrument. Once it is found that there is an inconsistency between the status information reported by the product under test and the information reported by the test instrument, the system will immediately abort the current test and trigger the alarm mechanism to ensure the safety and accuracy of the test process.

[0058] If the information reported by the test instrument is completely consistent with that of the lithium battery pack of the product under test (such as key parameters such as battery pack voltage, discharge current, short-circuit protection current value, etc.), the control module will issue an instruction to switch to the next test item according to the preset process, and another dedicated test instrument will take over the subsequent test tasks. After all test items are successfully completed, the control module will display detailed test results to the user through the control interface and provide powerful data processing and in-depth analysis functions to assist the user in comprehensively evaluating the product performance.

[0059] In one embodiment, the structural connection diagram of the automatic switching device for multiple test devices is as follows Figure 4 shown, including a control module, a device switching module, a first communication module, a second communication module, a power supply module, a buzzer, an indicator light, a barcode scanner, etc. Among them, the control module is a control system integrating a touch screen and a control module. The control module also includes modules such as a FLASH module, an SD card module, and a USB port, as shown Figure 5 as follows

[0060] The user selects a lithium battery pack with a product category of 50Ah and specifies the test items. Connect the RS232 communication interface of the DC DC power supply to a serial port interface JP1 of the first communication module in the automatic switching device, connect the RS232 communication interface of the electronic load meter to a serial port interface JP2 of the first communication module in the automatic switching device, and connect the RS232 communication interface of the internal resistance test instrument to a serial port interface JP3 of the first communication module in the automatic switching device. In addition, it is also necessary to ensure that the communication port of the 50Ah battery pack is correctly connected to the second communication module of the automatic switching device. The positive and negative poles of the three test instruments need to be connected in parallel to the test fixture, and it is necessary to ensure that the positive and negative poles of the fixture are in close contact with the positive and negative poles of the battery under test

[0061] The barcode scanner scans the QR code on the product under test and uploads the scanned information to the control module. After receiving the scan information, the control module starts to issue test instructions. The control module will send a switching instruction 000 to pins 9, 10, and 11 of the first analog switch chip U7 and the second analog switch chip U8 in the device switching module according to the selected product category and preset information of the user (see Figure 2 ). After receiving the instruction, U7 and U8 will conduct the internal control circuit between pin 3 and pin 13 (presenting a low resistance state). Thus, according to the schematic diagram, the device switching module will select the DC DC power supply connected through the JP1 port for communication control

[0062] The instruction issued by the control module first passes through the RS232_TXD port of the serial port chip and is transmitted to pins 2 and 7 of the isolation chip U6. Subsequently, the instruction is further transmitted to pins 3 and 13 of the chip U8 and finally reaches the RS232_RXD port of the DC DC power supply connected to the JP1 port

[0063] Once the DC DC power supply receives the instruction, it will first reply to the control module with a response signature instruction according to the instruction content, then set the output voltage and output current of the instrument (test instrument output parameters), and start the test process. After the test is completed, the DC DC power supply will pass the relevant test information through its RS232_TXD port, via the JP1 port, pins 13 and 3 of the chip U7, and pins 6 and 3 of the chip U6, and finally transmit it back to the RS232_RXD port of the serial port chip and back to the control module

[0064] After receiving the information sent by the DC power supply, the control module will perform corresponding processing and display it on the interface. If the test result shows unqualified, the control module will trigger an alarm and prompt to replace the product. If all tests related to charging are qualified, the control module will issue an instruction to send the switching instrument instruction 001 to pins 9, 10, and 11 of device switching modules U7 and U8 (see Figure 2 ).

[0065] After receiving instruction 001, the internal control circuits of U7 and U8 will disconnect pin 3 from pin 13 and make pin 3 conduct with pin 15 (conduct in a low-resistance state). According to the schematic diagram, it is known that at this time, the control module selects and controls the electronic load connected to the JP2 port to communicate.

[0066] The control module issues an instruction through the RS232_TXD port of the serial port chip. This instruction is transmitted to pins 2 and 7 of the U6 isolation chip, and then further transmitted to pins 3 and 15 of the U8 chip. Finally, the instruction reaches the RS232_RXD port of the electronic load connected to the JP2 port. After receiving the instruction, the electronic load will reply and operate in the constant current mode according to the preset parameters and set the required current value and ramp time, and then start the test process.

[0067] After the test is completed, the electronic load will send the relevant test data back to the control module through its RS232_TXD port. The data first passes through the JP2 port, then through pins 15 and 3 of the U7 chip, and then transmitted to pins 6 and 3 of the U6 chip, and finally reaches the serial port of the control module. After receiving these data, the control module will perform corresponding processing and display the results on the interface.

[0068] If the test result shows unqualified, the system will trigger the alarm mechanism and prompt the end of the test, and the product to be tested needs to be replaced. If all tests related to charging are qualified, the control module will issue an instruction to switch to the internal resistance tester connected to the JP3 port for the next test. Throughout the process, the system ensures the accuracy and efficiency of the test through precise control and data transmission.

[0069] The automatic switching device of multiple test equipment in this application performs excellently in improving test efficiency, ensuring test safety and reliability, and providing data processing and analysis functions, etc., and has broad application prospects and practical value.

[0070] It should be understood that various modifications can be made to the embodiments applied herein. Therefore, the above description should not be regarded as a limitation, but only as an example of the embodiments. Those skilled in the art will think of other modifications within the scope and spirit of this application.

[0071] The drawings included in and forming a part of the specification illustrate embodiments of the present application, and, together with the general description of the present application given above and the detailed description of the embodiments given below, are used to explain the principles of the present application.

[0072] These and other features of the present application will become apparent from the following description of the preferred forms of the embodiments given by way of non-limiting example with reference to the drawings.

[0073] It should also be understood that, although the present application has been described with reference to some specific examples, those skilled in the art can surely implement many other equivalent forms of the present application.

[0074] When taken in conjunction with the drawings, the above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description.

[0075] Specific embodiments of the present application will be described hereinafter with reference to the drawings; however, it should be understood that the embodiments claimed are merely examples of the present application, which can be implemented in various ways. Well-known and / or repetitive functions and structures are not described in detail so as not to obscure the present application with unnecessary or redundant details. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but rather are merely a basis and representative basis for the claims to teach those skilled in the art to use the present application in substantially any suitable detailed structure in a variety of ways.

[0076] This specification may use the phrases "in one embodiment", "in another embodiment", "in yet another embodiment" or "in other embodiments", each of which may refer to one or more of the same or different embodiments according to the present application.

[0077] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions within the essence and protection scope of the present application, and such modifications or equivalent substitutions should also be regarded as falling within the protection scope of the present application.

Claims

1. An automatic switching device for multiple test equipment, characterized in that: The automatic switching device for multiple test devices includes a control module, a device switching module, a first communication module and a second communication module, wherein: The control signal output end of the control module is electrically connected to the control signal input end of the device switching module, the first data transceiver end of the control module is electrically connected to the first data end of the device switching module, the second data end of the device switching module is electrically connected to the first communication module, the multiple interfaces of the first communication module are electrically connected to multiple test devices one by one, the output end of each of the test devices is electrically connected to the power input end of the device under test, and the data communication end of the device under test is electrically connected to the second data transceiver end of the control module through the second communication module; The device switching module includes multiple working conditions, and under each working condition, the control module is connected to a test device through the device switching module and the first communication module.

2. The automatic switching device for multiple test equipment according to claim 1, characterized in that: The device switching module includes a serial communication unit, an isolation unit and a channel switching unit, wherein: The first data transceiver end of the serial communication unit is electrically connected to the first serial data transceiver end of the control module, the second data transceiver end of the serial communication unit is electrically connected to the first data end of the isolation unit, the second data end of the isolation unit is electrically connected to the first data end of the channel switching unit, the second data end of the channel switching unit is electrically connected to the first communication module, and the control signal input end of the channel switching unit is electrically connected to the control signal output end of the control module.

3. The automatic switching device for multiple test equipment according to claim 2, characterized in that: The serial communication unit is a first serial communication chip, the isolation unit is an isolation chip, and the channel switching unit includes a first analog switch chip and a second analog switch chip, wherein: The first data transceiver end of the first serial port communication chip is electrically connected to the first serial port data transceiver end of the control module, the second data transceiver end of the first serial port communication chip is electrically connected to the first data end and the second data end of the isolation chip respectively, the third data end of the isolation chip is electrically connected to the common end of the first analog switch chip, the fourth data end of the isolation chip is electrically connected to the common end of the second analog switch chip, the multiple data ends of the first analog switch chip and the multiple data ends of the second analog switch chip are electrically connected to the first communication module respectively, and the control signal input end of the first analog switch chip and the control signal input end of the second analog switch chip are both electrically connected to the control signal output end of the control module.

4. The automatic switching device for multiple test equipment according to claim 3, characterized in that: The first communication module includes multiple serial port interfaces, wherein two serial port data terminals of each serial port interface are electrically connected to a data terminal of the first analog switch chip and a data terminal of the second analog switch chip respectively, and each serial port interface is electrically connected to a communication port of a test device through a serial port data line.

5. The automatic switching device for multiple test equipment according to claim 1, characterized in that: The second communication module communicates with the device under test and the control module via RS232 communication protocol, RS485 communication protocol or CAN bus communication protocol.

6. The automatic switching device for multiple test equipment according to any one of claims 1 to 5, characterized in that: The automatic switching device for multiple test equipments further comprises a display module, and a data input terminal of the display module is electrically connected to a display data output terminal of the control module.

7. The automatic switching device for multiple test equipment according to any one of claims 1 to 5, characterized in that: The automatic switching device for multiple test equipment also includes a communication conversion module, which includes a USB conversion chip and a second serial port communication chip, wherein: The USB data end of the USB conversion chip is electrically connected to the USB interface of the computer, the serial port data end of the USB conversion chip is electrically connected to the first data transceiver end of the second serial port communication chip, and the second data transceiver end of the second serial port communication chip is electrically connected to the second serial port data transceiver end of the control module.

8. The automatic switching device for multiple test equipment according to any one of claims 1 to 5, characterized in that: The automatic switching device for multiple test equipment also includes a power module, which includes a power input interface, a power conversion chip and an output interface, wherein: The power input interface is electrically connected to the power supply terminal, and the power input interface is also electrically connected to the input end of the power conversion chip. The output end of the power conversion chip is electrically connected to the output interface, and the output interface is electrically connected to the power input end of the control module, the power input end of the device switching module, and the power input end of the first communication module.

9. The automatic switching device for multiple test equipment according to any one of claims 1 to 5, characterized in that: The automatic switching device for multiple test equipments further comprises an alarm module, an input end of the alarm module is electrically connected to an alarm signal output end of the control module.

10. An automatic switching system for multiple test devices, characterized in that: The invention comprises a plurality of testing devices and an automatic switching device for the plurality of testing devices according to any one of claims 1 to 9.

Images