Device and method for detecting line sequence of test equipment

Abstract

The invention aims to provide the detection device and the detection method for the line sequence of the test equipment. The detection device and the detection method have the advantages of simplicity in operation, low cost, safety, reliability and capability of quickly detecting whether the line sequences of all test channels are correct or not. The device comprises an upper computer, an electric control box, a battery tester and a plurality of test lines, the battery tester is electrically connected with the upper computer and the electric control box, and the detection device for the line sequence of the test equipment comprises a detection assembly before the test lines are installed and a detection assembly after the test lines are installed; the detection assembly before test line installation comprises a test board, the electric cabinet is connected with the test board through a plurality of test lines, and the internal resistance of the battery to be tested is simulated through the standard resistance of the test board; the detection assembly after the test lines are installed comprises a test clamp adapter plate, a test clamp and a short circuit piece, the electric cabinet is connected with the test clamp adapter plate through the plurality of test lines, one end of the test clamp is connected with the test clamp adapter plate, and the other end of the test clamp is connected with the short circuit piece. The method is applied to the technical field of line sequence detection.

Description

Technical Field

[0001] The present invention is applied to the technical field of line sequence detection, and particularly relates to a detection device and a detection method for the line sequence of a test device. Background Art

[0002] With the development of new energy technology, the technology of lithium batteries is changing with each passing day. Soft-pack power batteries are a type of lithium-ion battery. Compared with liquid lithium batteries, soft-pack power batteries have many obvious advantages such as high energy density, smaller size, ultra-thinness, lightweight and high safety. They are a new type of battery. OCV refers to the battery open circuit voltage test, and ACR refers to the battery AC internal resistance test. In the production process of soft-pack lithium-ion batteries, OCV testing is a very important process. After the formation and capacity separation process, the battery is subjected to multiple open circuit voltage and AC internal resistance tests after a period of static standing. The measured parameters are used as one of the important parameters for determining the battery grade. In order to improve the testing efficiency of batteries, manufacturers have higher and higher requirements for the number of equipment test channels. The current testing requirements have reached 240 channels. Most of the detection devices in the existing technology use standard instruments, which have the disadvantages of large size and high cost. The test board is designed to measure voltage and internal resistance at the same time, and the operation is complicated; if manual testing is used, the detection efficiency is low and it is easy to miss errors. Therefore, it is necessary to provide a detection device and method for the line sequence of test equipment, which has the advantages of simple operation, low cost, safety and reliability, high detection efficiency, suitable for batch introduction of equipment, and can quickly detect whether the line sequence of all test channels is correct. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a detection device and a detection method for the line sequence of a test device, which has the advantages of simple operation, low cost, safety and reliability, high detection efficiency, suitability for batch introduction of equipment, and the ability to quickly detect whether the line sequence of all test channels is correct.

[0004] The technical solution adopted by the present invention is: the present invention comprises a host computer, an electric control box, a battery tester and a plurality of test lines, the battery tester is electrically connected to the host computer and the electric control box, the detection device of the test equipment line sequence comprises a detection component before the test line is installed and a detection component after the test line is installed; The detection assembly before the test line is installed includes a test board, the electric control box is connected to the test board via a number of the test lines, and the internal resistance of the battery to be tested is simulated by the standard resistance of the test board, so as to perform line sequence detection; The detection assembly after the test line is installed includes a test clip adapter plate, a test clip and a short-circuit plate. The electric control box is connected to the test clip adapter plate via several of the test lines, one end of the test clip is connected to the test clip adapter plate, and the other end of the test clip is connected to the short-circuit plate. The short-circuit plate is used to simulate the internal resistance of the battery to be tested, thereby performing line sequence detection.

[0005] It can be seen from the above scheme that the present application utilizes the standard resistance of the test board to simulate the internal resistance of the battery to be tested, thereby performing line sequence detection; utilizes a metal short-circuit to simulate the internal resistance of the battery for line sequence detection; utilizes the test internal resistance instead of the test voltage to perform line sequence detection; the detection device uses different tooling to perform step-by-step detection before and after the installation of the test line, which is beneficial to improving the test efficiency. The standard resistor uses a resistance value of 0.5mR and 1mR, which is closer to the internal resistance of the battery. The short-circuit simulates the battery's ear design, which is close to the real test environment; it has the advantages of simple design, low cost, safety, reliability, and high efficiency, and is suitable for introduction during mass production of equipment.

[0006] A preferred solution is that the test board includes 16 groups of connectors, and every 4 groups of the connectors are connected to 2 groups of 4-wire standard resistors, the 4-wire standard resistors are used as reference sources, the resistance values ​​of the 2 groups of 4-wire standard resistors are respectively 0.5mR and 1mR, the 4-wire standard resistors with a resistance value of 0.5mR are connected to the odd channels of the 4 groups of connectors, and the 4-wire standard resistors with a resistance value of 1mR are connected to the even channels of the 4 groups of connectors, 1 group of the connectors has 8 channels, 4 groups of the connectors have 32 channels, and 1 group of the test board has 128 channels; the number of groups of the test lines is 30, and the 30 groups of the test lines include test line #1 to test line #30.

[0007] A preferred solution is that the detection method includes a detection step before the test line is installed, and the detection step is as follows: Step A, selecting two groups of the test boards, the two groups of the test boards including the test board #1 and the test board #2; Step B, connecting the two ends of the test line #1 to the test line #15 to the electric control box and the test board #1 respectively, and connecting the two ends of the test line #16 to the test line #30 to the electric control box and the test board #2 respectively; Step C, the entire detection device is powered on; Step D: Open the test platform software through the host computer, select channels #1 to #240, and perform internal resistance test; Step E: Analyze the test data. By comparing the internal resistance value, the abnormal channel can be screened out, and the line sequence of the corresponding channel can be checked to see if it is open, short or wrongly wired. When the internal resistance test value is 0 or infinite, it means that the channel has poor contact or an open circuit. When the test value deviates from the normal value, it means that the channel has crossed lines, short circuit or the channel electronic components are damaged.

[0008] A preferred solution is that the detection method further includes a detection step after the test line is installed, and the detection step is as follows: Step F, installing the shorting piece to the material frame of the battery to be tested; Step G, powering on the entire detection device; Step H, controlling the material frame of the battery to be tested to move to the testing position; Step I, controlling the test clip to be pressed onto the shorting piece, that is, the SOURCE and SENSE signals of the test clip are connected to the shorting piece; Step J, opening the test platform software through the host computer, selecting channels #1 to #240, and performing an internal resistance test, that is, the test value is the internal resistance of the short-circuit; Step K, analyze the test data, screen out abnormal channels by comparing the internal resistance values, and check whether the line sequence of the corresponding channel is open, short or wrongly wired; when the internal resistance test value is 0 or infinite, it means that the channel has poor contact or open circuit; when the test value deviates from the normal value, it means that the channel has line crossing, short circuit or channel electronic components are damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a system block diagram of the present invention; Figure 2 is a circuit schematic diagram of the test board; Figure 3 is a PCB plan view of the test board; Figure 4 is a plan view of the shorting piece; Figure 5 It is a test block diagram of the detection steps before the test line is installed; Figure 6 It is the test data table of 1-24 channels for line sequence detection before the test line is installed; Figure 7 is a schematic diagram of the connection between the test clip and the shorting piece; Figure 8 It is a test block diagram of the detection steps after the test line is installed; Fig. 9 It is the test data table of channels 1-24 for line sequence detection after the test line is installed. DETAILED DESCRIPTION

[0010] like Figures 1 to 9 As shown, in this embodiment, the present invention includes a host computer 1, an electric control box 2, a battery tester 3 and a plurality of test lines 4, the battery tester 3 is electrically connected to the host computer 1 and the electric control box 2, and the detection device of the test equipment line sequence includes a detection component before the test line is installed and a detection component after the test line is installed; The detection assembly before the test line is installed includes a test board 5, the electric control box 2 is connected to the test board 5 via a plurality of the test lines 4, and the internal resistance of the battery to be tested is simulated by the standard resistance of the test board 5, so as to perform line sequence detection; The detection assembly after the test line is installed includes a test clip adapter plate 6, a test clip 7 and a short-circuit plate 8. The electric control box 2 is connected to the test clip adapter plate 6 via several of the test lines 4, one end of the test clip 7 is connected to the test clip adapter plate 6, and the other end of the test clip 7 is connected to the short-circuit plate 8. The short-circuit plate 8 is used to simulate the internal resistance of the battery to be tested, thereby performing line sequence detection.

[0011] The host computer 1 is used to run the test program; the electrical control box 2 exchanges information with the host computer 1, controls channel switching, switches the measurement signal of the battery tester 3 to different paths of the test clip 7, and stores calibration data and controls device actions; the model of the battery tester 3 is BT3562A, and the battery tester 3 is a high-precision battery tester for measuring the AC internal resistance and open-circuit voltage of the battery; the test clip adapter plate 6 transfers the path of the test clip 7 to the electrical control box 2; the usage scenario of the test clip 7: when the battery is tested, the test clip 7 is pressed and the signal of the battery ear is transferred to the test clip 7; when the line sequence detection is performed, the test clip 7 is pressed and the signal of the short-circuit piece 8 is transferred to the test clip 7; the short-circuit piece 8 is a metal short-circuit piece.

[0012] like Figure 2 As shown, in this embodiment, the test board 5 includes 16 groups of connectors, and each of the 4 groups of connectors is connected with 2 groups of 4-wire standard resistors, which are used as reference sources. The resistance values ​​of the 2 groups of 4-wire standard resistors are respectively selected as 0.5mR accuracy ±1% and 1mR accuracy ±0.5%. The 4-wire standard resistors with a resistance value of 0.5mR are connected to the odd channels of the 4 groups of connectors, and the 4-wire standard resistors with a resistance value of 1mR are connected to the even channels of the 4 groups of connectors. One group of connectors has 8 channels, four groups of connectors have 32 channels, and one group of the test board 5 has 128 channels; the number of groups of the test lines 4 is 30, and the 30 groups of the test lines 4 include test lines #1 to test lines #30. The standard resistors of the test board 5 are used to simulate the internal resistance of the battery to be tested, so as to perform line sequence detection.

[0013] In this embodiment, the test is divided into two parts: Before installing the test line: Use the test board 5 to check whether the channel line sequence of the control part hardware board and the line sequence of the test wire are normal. This is done before installing the test line. If problems are found, they can be corrected in time. Because the equipment is relatively large and the wiring is complicated, the time for disassembling and assembling the wires can be saved; After the test line is installed: the original complete test system of the equipment uses the short-circuit piece 8 to simulate the battery, mainly to detect whether the line sequence of all channels of the complete test system is normal. After the test line is installed, the short-circuit piece 8 is used for testing. The design is simple, the cost is low, the operation is convenient, and it is safe and reliable.

[0014] like Figures 1 to 9 As shown, in this embodiment, the detection method includes a detection step before the test line is installed, and the detection step is as follows: Step A, selecting 2 groups of the test boards 5128*2=256 channels, the 2 groups of the test boards 5 include the test board #1 and the test board #2; Step B, connecting the two ends of the test line #1 to the test line #15 to the electric control box 2 and the test board #1 respectively, and connecting the two ends of the test line #16 to the test line #30 to the electric control box 2 and the test board #2 respectively; Step C, the entire detection device is powered on; Step D: Open the test platform software through the host computer 1, select channels #1 to #240, and perform internal resistance test; Step E: Analyze the test data. By comparing the internal resistance value, the abnormal channel can be screened out, and the line sequence of the corresponding channel can be checked to see if it is open, short or wrongly wired. When the internal resistance test value is 0 or infinite, it means that the channel has poor contact or an open circuit. When the test value deviates from the normal value, it means that the channel has crossed lines, short circuit or the channel electronic components are damaged.

[0015] like Figure 6 As shown, in this embodiment, the test data examples of channels 1-24, that is, when the test value is 0 or infinite, it indicates that the channel has poor contact or an open circuit, and when the test value deviates from the normal value, it indicates that the channel has a line cross, a short circuit, or the channel electronic components are damaged.

[0016] like Figure 1 As shown, in this embodiment, the detection method further includes a detection step after the test line is installed, and the detection step is as follows: Step F, installing the shorting piece 8 to the material frame of the battery to be tested; Step G, powering on the entire detection device; Step H, controlling the material frame of the battery to be tested to move to the testing position; Step I, controlling the test clip 7 to be pressed onto the shorting piece 8, that is, the SOURCE and SENSE signals of the test clip 7 are both connected to the shorting piece 8; Step J, open the test platform software through the host computer 1, select channels #1 to #240, and perform an internal resistance test, that is, the test value is the internal resistance of the short-circuit piece 8; Step K, analyze the test data, screen out abnormal channels by comparing the internal resistance values, and check whether the line sequence of the corresponding channel is open, short or wrongly wired; when the internal resistance test value is 0 or infinite, it means that the channel has poor contact or open circuit; when the test value deviates from the normal value, it means that the channel has line crossing, short circuit or channel electronic components are damaged.

[0017] like Fig. 9 As shown, in this embodiment, when the internal resistance test value is 0 or infinite, it indicates that the channel has poor contact or an open circuit. When the test value deviates from the normal value, it indicates that the channel has line crossing, short circuit or channel electronic components are damaged.

[0018] like Figure 4 As shown, in this embodiment, the short-circuit 8 is made of copper, and the size design of the real battery tab is simulated. The positive and negative electrodes are designed as one, and the mounting holes match the material frame of the battery.

[0019] Although the embodiments of the present invention are described with practical solutions, they do not constitute limitations on the meaning of the present invention. For those skilled in the art, it is obvious to modify the implementation scheme and combine it with other solutions based on this description.

Claims

1. A detection device for testing the line sequence of equipment, characterized in that: It comprises a host computer (1), an electric control box (2), a battery tester (3) and a plurality of test lines (4); the battery tester (3) is electrically connected to the host computer (1) and the electric control box (2); the detection device for the line sequence of the test equipment comprises a detection component before the test line is installed and a detection component after the test line is installed; The detection assembly before the test line is installed comprises a test board (5), the electric control box (2) is connected to the test board (5) via a plurality of the test lines (4), and the internal resistance of the battery to be tested is simulated by the standard resistance of the test board (5), so as to perform line sequence detection; The detection assembly after the test line is installed comprises a test clip adapter plate (6), a test clip (7) and a short-circuit piece (8); the electric control box (2) is connected to the test clip adapter plate (6) via a plurality of the test lines (4); one end of the test clip (7) is connected to the test clip adapter plate (6); the other end of the test clip (7) is connected to the short-circuit piece (8); the internal resistance of the battery to be tested is simulated via the short-circuit piece (8), thereby performing line sequence detection.

2. The device for detecting the line sequence of a test device according to claim 1, characterized in that: The test board (5) includes 16 groups of connectors, and each of the four groups of connectors is connected to two groups of four-wire standard resistors, and the four-wire standard resistors are used as reference sources. The resistance values ​​of the two groups of four-wire standard resistors are selected as 0.5mR (accuracy ±1%) and 1mR (accuracy ±0.5%) respectively. The four-wire standard resistors with a resistance value of 0.5mR are connected to the odd-numbered channels of the four groups of connectors, and the four-wire standard resistors with a resistance value of 1mR are connected to the even-numbered channels of the four groups of connectors. One group of the connectors has eight channels, four groups of the connectors have 32 channels, and one group of the test board (5) has 128 channels. The number of groups of the test lines (4) is 30, and the 30 groups of the test lines (4) include test line #1 to test line #30.

3. A detection method of the detection device for testing the line sequence of a test device as claimed in claim 2, characterized in that: The detection method includes detection steps before the test line is installed, and the detection steps are as follows: Step A, selecting two groups of the test boards (5) (128*2=256 channels), the two groups of the test boards (5) comprising the test board #1 and the test board #2; Step B, connecting the two ends of the test line #1 to the test line #15 to the electric control box (2) and the test board #1 respectively, and connecting the two ends of the test line #16 to the test line #30 to the electric control box (2) and the test board #2 respectively; Step C, the entire detection device is powered on; Step D: Open the test platform software through the host computer (1), select channels #1 to #240, and perform internal resistance testing; Step E: Analyze the test data. By comparing the internal resistance value, the abnormal channel can be screened out, and the line sequence of the corresponding channel can be checked to see if it is open, short or wrongly wired. When the internal resistance test value is 0 or infinite, it means that the channel has poor contact or an open circuit. When the test value deviates from the normal value, it means that the channel has crossed lines, short circuit or the channel electronic components are damaged.

4. A detection method according to claim 3, characterized in that: The detection method also includes a detection step after the test line is installed, and the detection step is as follows: Step F, installing the shorting piece (8) to the material frame of the battery to be tested; Step G, powering on the entire detection device; Step H, controlling the material frame of the battery to be tested to move to the testing position; Step I: Control the test clip (7) to be pressed onto the shorting piece (8), that is, the SOURCE and SENSE signals of the test clip (7) are both connected to the shorting piece (8); Step J, opening the test platform software through the host computer (1), selecting channels #1 to #240, and performing an internal resistance test, that is, the test value is the internal resistance of the short-circuit piece (8); Step K, analyze the test data, screen out abnormal channels by comparing the internal resistance values, and check whether the line sequence of the corresponding channel is open, short or wrongly wired; when the internal resistance test value is 0 or infinite, it means that the channel has poor contact or open circuit; when the test value deviates from the normal value, it means that the channel has line crossing, short circuit or channel electronic components are damaged.

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