Method, device and equipment for testing electrical performance of 0BB battery piece and readable storage medium

Abstract

The invention provides an electrical performance test method, device and equipment of an 0BB battery piece and a readable storage medium. The method comprises the following steps: respectively testing a battery piece with a main grid and an 0BB battery piece, and correspondingly obtaining an electrical performance test parameter of the battery piece with the main grid and an electrical performance test parameter of the 0BB battery piece; and determining the electrical performance of the 0BB battery piece according to the electrical performance test parameters of the battery piece with the main grid and the electrical performance test parameters of the 0BB battery piece. The change trend of the electrical performance test parameters of the main grid battery piece and the 0BB battery piece under different probe row numbers is analyzed by testing the electrical performance test parameters of the main grid battery piece and the 0BB battery piece, the electrical performance of the 0BB battery piece is evaluated by comparing and analyzing the change trend, and compared with an existing test method, the test accuracy of the 0BB battery piece is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic cell technology, and in particular to a method, device, equipment and readable storage medium for testing the electrical performance of an 0BB cell. Background Art

[0002] At present, most of the conventional N-type tunnel oxide passivated contact technology (Tunnel Oxide Passivated Contact, hereinafter referred to as: Topcon) batteries are mainly 16BB (16 main grids) or 18BB (18 main grids). The main grids have increased from 2 at the beginning to 18 now. The more the number of main grids increases, the stronger the ability to collect and transmit photogenerated carriers is, thereby achieving a higher photoelectric conversion rate and output power. However, as the number of main grids increases, the shading area becomes larger and larger, which affects the number of photogenerated carriers generated. In order to achieve the best photoelectric conversion rate, there are many factors to consider, such as the width, number, shape, material and other factors of the grid line. In order to reduce the shading area, the emergence of main grid electrode-free (0BB) batteries solves this problem, and accordingly, a test fixture with double-row detection needles is produced to test the electrical properties of main grid electrode-free.

[0003] However, although there are test fixtures for busbar-free cells on the market, there are no corresponding test methods for the test fixtures. The method used by the test system still uses the test system with busbars, resulting in inaccurate test results when using improved fixtures to test busbar-free cells. Summary of the invention

[0004] The purpose of the present invention is to solve the defects of the above-mentioned prior art and provide an electrical performance testing method, device, equipment and readable storage medium for 0BB battery cells.

[0005] The present invention provides a method for testing the electrical performance of an 0BB battery cell, comprising:

[0006] Step 1: Test the main-grid battery cell and the 0BB battery cell respectively, and obtain the electrical performance test parameters of the main-grid battery cell and the electrical performance test parameters of the 0BB battery cell accordingly;

[0007] Step 2: Determine the electrical performance of the 0BB cell according to the electrical performance test parameters of the main-grid cell and the electrical performance test parameters of the 0BB cell.

[0008] According to a method for testing the electrical performance of a 0BB battery cell provided by the present invention, before step 1, the method further comprises:

[0009] Using a first number of probe rows of an IV tester, the IV tester is calibrated with main-grid battery labels, and the main-grid battery sheet and the 0BB battery sheet are tested respectively with the calibrated IV tester;

[0010] The second number of probe rows of the IV tester are used to calibrate the IV tester with the main grid battery label, and the main grid battery sheet and the 0BB battery sheet are tested respectively with the calibrated IV tester.

[0011] According to a method for testing the electrical performance of a 0BB battery cell provided by the present invention, step 1 comprises:

[0012] Using a first number of probe rows of an IV tester to test the main-grid battery cell and the 0BB battery cell respectively, and measuring the first electrical performance test parameters corresponding to the main-grid battery cell and the first electrical performance test parameters corresponding to the 0BB battery cell;

[0013] The second number of probe rows of the IV tester are used to test the main-grid battery cell and the 0BB battery cell again, respectively, to obtain the second electrical performance test parameters corresponding to the main-grid battery cell and the second electrical performance test parameters corresponding to the 0BB battery cell.

[0014] According to a method for testing the electrical performance of a 0BB battery cell provided by the present invention, the step 2 comprises:

[0015] Perform a linear analysis on the first electrical performance test parameter and the second electrical performance test parameter, and determine the electrical performance of the 0BB battery cell according to the analysis results.

[0016] According to a method for testing electrical performance of a 0BB battery cell provided by the present invention, the linear analysis of the first electrical performance test parameter and the second electrical performance test parameter is performed, and the electrical performance of the 0BB battery cell is determined according to the analysis result, including:

[0017] Determine a first slope of electrical performance corresponding to the main-grid battery according to a first electrical performance test parameter and a second electrical performance test parameter corresponding to the main-grid battery sheet;

[0018] Determine the second slope of the electrical performance corresponding to the 0BB battery cell according to the first electrical performance test parameter and the second electrical performance test parameter corresponding to the 0BB battery cell;

[0019] Determine a parameter correction value of the 0BB battery cell according to the first slope and the second slope;

[0020] The electrical performance of the 0BB battery cell is determined according to the parameter correction value of the 0BB battery cell.

[0021] According to a method for testing electrical performance of a 0BB battery cell provided by the present invention, determining a parameter correction value of the 0BB battery cell according to the first slope and the second slope includes:

[0022] Determine the parameter correction value of 0BB battery according to the following formula:

[0023] Parameter correction value = i*(A1-A2);

[0024] Wherein, A1 is the first slope, A2 is the second slope; i is the number of probe rows;

[0025] A1=(Isc Q,i -Isc Q,q ) / (iq);

[0026] A2=(Isc H,i -Isc H,q ) / (iq);

[0027] Where Q is a battery with a main grid, H is a 0BB battery, i and q represent the number of probe rows, and I>q; Isc Q,i Indicates the short-circuit current of the main grid battery Q tested with the number of probe rows I, Isc H,i It represents the short-circuit current of 0BB battery tested with probe row number i; Isc Q,q It represents the short-circuit current of the main grid battery Q tested with the number of probe rows q, Isc H,q It represents the short-circuit current of 0BB battery tested with q probe rows.

[0028] The present invention also provides a device for performing the above-mentioned electrical performance testing method of 0BB battery cells, which comprises:

[0029] A test unit, used to test main-grid cells and 0BB cells respectively;

[0030] An acquisition unit, used to obtain the electrical performance test parameters of the main grid battery cell and the electrical performance test parameters of the 0BB battery cell;

[0031] The determination unit is used to determine the electrical performance of the 0BB battery cell according to the electrical performance test parameters of the main grid battery cell and the electrical performance test parameters of the 0BB battery cell.

[0032] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the electrical performance testing method of the 0BB battery cell as described in any one of the above is implemented.

[0033] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the electrical performance testing method of the 0BB battery cell as described in any one of the above.

[0034] The present invention also provides a computer program product, including a computer program, which, when executed by a processor, implements any of the above-mentioned methods for testing the electrical performance of 0BB battery cells.

[0035] Beneficial effects:

[0036] The electrical performance testing method, device, equipment and readable storage medium of the 0BB battery cell provided by the present invention analyze the changing trend of the electrical performance test parameters of the main grid battery cell and the 0BB battery cell under different numbers of probe rows, and evaluate the electrical performance of the 0BB battery cell by comparing and analyzing the changing trend. Compared with the existing testing methods, the testing accuracy of the 0BB battery cell is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A flow chart of the electrical performance testing method of the 0BB battery cell provided by the present invention;

[0038] Figure 2 This is a structural diagram of the electrical performance testing device for 0BB battery cells provided by the present invention;

[0039] Figure 3 This is a schematic structural diagram of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] At present, most conventional N-Topcon cells are based on 16 or 18 main grids. As the number of main grids increases, the shading area also increases, and the photoelectric conversion rate also decreases. In order to reduce the shading area, it is hypothesized that the grid lines should be made as thin as possible, but the thinner the grid lines, the smaller the cross-sectional area of ​​the main grid, the greater the series resistance loss, and the lower the fill factor. In order to solve the shading area, the emergence of the main grid electrode (0BB) battery solves this problem. The advantages of 0BB (no main grid) batteries are:

[0042] 1) No main grid silver paste and electrode points for positioning and welding, which reduces the shading area and silver paste cost;

[0043] 2) Using thinner and more solder strips reduces the transmission distance of photogenerated carriers, improves the conductivity, effectively reduces the series resistance, and increases the power of the components;

[0044] 3) A larger number of solder ribbons increases the tension of the battery cell and improves the reliability of the module.

[0045] However, the graphics of 0BB (no main grid) batteries are diversified, the main grid becomes a connecting line, the connecting line is optional, the connecting line can be a solid line, a dotted line, or an alternating solid and dotted line, and the front graphic may be consistent with the back graphic, or it may not be consistent. In order to test 0BB, a test fixture for 0BB batteries is applied. However, although the test fixture has been updated, the test method for 0BB battery cells still uses the test method of N-TOPCon batteries, which results in inaccurate results for testing 0BB battery cells. The present application provides an electrical performance test method for 0BB battery cells by introducing a correction factor, which is low-cost and time-consuming. Figure 1 The flow chart of the electrical performance testing method of the 0BB battery cell provided by the present invention is as follows: Figure 1 As shown, including:

[0046] Step 1: Test the main-grid battery cell and the 0BB battery cell respectively, and obtain the electrical performance test parameters of the main-grid battery cell and the electrical performance test parameters of the 0BB battery cell accordingly.

[0047] Specifically, the present invention adopts IV tester to test main grid battery sheet, 0BB battery sheet.IV tester (i.e. current-voltage tester) is usually equipped with multiple pairs of probe rows, for establishing electrical connection with the device under test (such as solar cell, semiconductor device, etc.), so as to test the current-voltage characteristic. The number of probe rows can be configured according to test requirements, and common configurations include single row, double row, multiple rows, etc. Wherein, electrical performance test parameters may include: open circuit voltage (Voc), short circuit current (Isc), current density (Jsc), maximum output power (Pmax), fill factor (FF) and efficiency (Eta), etc.

[0048] Step 2: Determine the electrical performance of the 0BB cell based on the electrical performance test parameters of the main-grid cell and the electrical performance test parameters of the 0BB cell.

[0049] Specifically, the present invention evaluates the electrical performance of the 0BB battery cell by analyzing the changes in the electrical performance test parameters of the main-grid battery cell and the electrical performance test parameters of the 0BB battery cell.

[0050] The electrical performance testing method of 0BB battery cells provided by the present invention analyzes the changing trend of the electrical performance testing parameters of main-grid battery cells and 0BB battery cells under different numbers of probe rows, and evaluates the electrical performance of 0BB battery cells by comparing and analyzing the changing trend. Compared with the existing testing methods, the testing accuracy of 0BB battery cells is effectively improved.

[0051] Furthermore, before using the IV tester to test the main grid battery cell and the 0BB battery cell respectively, the method further includes:

[0052] Using the first number of probe rows of the IV tester, the IV tester is calibrated with the main grid battery label, and the calibrated IV tester is used to test the main grid battery cell and 0BB battery cell respectively; using the second number of probe rows of the IV tester, the IV tester is calibrated with the main grid battery label, and the calibrated IV tester is used to test the main grid battery cell and 0BB battery cell respectively.

[0053] Specifically, the IV tester is an instrument for measuring the internal resistance and voltage of a battery or photovoltaic module, and its accuracy is crucial for evaluating the performance of a battery cell. Due to the differences in factors such as the contact resistance between the probe and the battery cell, the probe spacing, etc. when testing using a platform with different numbers of probe rows, the test results may be different. Using a main grid battery cell with known performance parameters (the embodiment of the present invention uses 18BB) as a standard for calibration (the 18BB standard is a reference for known performance parameters, and its IV parameters are stable and reliable), the impact of these differences on the test results can be eliminated or reduced, thereby ensuring the accuracy of the test results. The specific calibration method is: by comparing the data of the main grid battery cell and 0BB battery cell measured by the tester with the data of the 18BB standard, the error of the tester can be evaluated, and necessary corrections and adjustments are made, thereby ensuring the accuracy of the subsequent test results of the main grid battery cell and 0BB battery cell.

[0054] The electrical performance test method of 0BB battery cells provided by the present invention can improve the accuracy of the test parameters by first calibrating the test machine with a standard sheet before testing the main grid battery cells and the 0BB battery cells, and measuring the test parameters of the main grid battery cells and the 0BB battery with the calibrated IV test machine, thereby providing strong data support for the electrical performance evaluation of the 0BB battery cells and improving the accuracy of the electrical performance test of the 0BB battery cells. More importantly: the present invention can effectively improve the accuracy of the electrical performance test parameters by first calibrating the IV test machine with a main grid battery standard sheet after changing the number of probe rows of the IV test machine each time, and then testing it, thereby further improving the accuracy of the electrical performance test of the 0BB battery cells.

[0055] Furthermore, the following describes how to obtain the electrical performance test parameters of the busbar cell and the 0BB cell by testing the busbar cell and the 0BB cell:

[0056] First, a first number of probe rows of the IV test machine are used to test the main-gate battery cell and the 0BB battery cell respectively, and the first electrical performance test parameters corresponding to the main-gate battery cell and the first electrical performance test parameters corresponding to the 0BB battery cell are measured; then a second number of probe rows of the IV test machine are used to test the main-gate battery cell and the 0BB battery cell again, and the second electrical performance test parameters corresponding to the main-gate battery cell and the second electrical performance test parameters corresponding to the 0BB battery cell are measured.

[0057] Specifically, the present invention uses different numbers of probe rows to simulate different test conditions. For example, a busbar cell and an 0BB cell are tested on 4 pairs of probe rows and 14 pairs of probe rows respectively:

[0058] First, an IV tester with a low number of probe rows (4 rows) is used to test the main-grid battery cell and the 0BB battery cell in turn, thereby obtaining the electrical performance test parameters of the main-grid battery cell and the 0BB battery cell corresponding to the 4 rows of probes, respectively.

[0059] Then, an IV tester with a high number of probe rows (14 rows) is used to test the main-grid battery cell and the 0BB battery cell in turn, thereby obtaining the electrical performance test parameters of the main-grid battery cell and the 0BB battery cell corresponding to the 14 rows of probes.

[0060] During the test, ensure that the test conditions (such as light intensity, temperature, etc.) of the busbar cell and the 0BB cell are consistent in order to make an accurate comparison. By observing the change trends of the electrical performance test parameters (Eta, Voc, Isc, FF) obtained by the busbar cell and the 0BB cell respectively under different numbers of probe rows, and by comparing and analyzing the change trends of the electrical performance test parameters of the busbar cell and the 0BB cell, the electrical performance of the 0BB cell can be evaluated.

[0061] Specifically, the testing method provided by the present invention can be: first, using an IV testing machine with a first number of probe rows, calibrating the testing machine using an 18BB standard, and then using the calibrated testing machine to test the main-grid battery cell and the 0BB battery cell to obtain corresponding first electrical performance test parameters; then, using an IV testing machine with a second number of probe rows, calibrating the testing machine using the 18BB standard again, and then using the calibrated testing machine to test the main-grid battery cell and the 0BB battery cell to obtain corresponding second electrical performance test parameters, and then performing linear analysis on the first electrical performance test parameters and the second electrical performance test parameters corresponding to the main-grid battery cell and the 0BB battery cell, respectively, and determining the electrical performance of the 0BB battery cell according to the analysis results.

[0062] The following provides an embodiment of performing linear analysis on the first electrical performance test parameter and the second electrical performance test parameter, which is as follows:

[0063] 1. Determine the correction parameters: On the IV tester (Lixit manual IV tester), use a platform with different numbers of probe rows, calibrate the IV tester with 18BB standard wafers, test 0BB cells (the two graphs are inconsistent), and see the relative IV parameter changes of 0BB cells relative to 18BB standard wafers. See Table 1 for details.

[0064] Table 1 Electrical properties of 16BB and 0BB with different numbers of probe rows

[0065]

[0066] From Table 1 we can see that:

[0067] 1) The Voc differences of more than 4 pairs of probe rows are basically the same, indicating that the Voc tested by more than 4 probe rows is basically reliable and does not need to be corrected;

[0068] 2) FF is related to both the test fixture and the calibration standard. The more probe rows there are in the 0BB battery test, the closer it is to the real FF. The FF differences of more than 10 pairs of probe rows are basically the same, indicating that the FF tested with more than 10 probe rows is basically reliable and does not need to be corrected.

[0069] 3) The graphics of the two 0BB battery cells are inconsistent, and the Isc difference is large, so Isc correction is required.

[0070] The method provided by the present invention simulates different test conditions by using different numbers of probe rows to obtain multiple groups of electrical performance test parameters for main grid battery cells and 0BB battery cells. On the one hand, by analyzing the multiple groups of electrical performance test parameters for main grid battery cells and 0BB battery cells, it is determined that the electrical performance of 0BB battery cells can be evaluated only by correcting Isc, thereby improving the efficiency of electrical performance testing of 0BB battery cells. On the other hand, linear analysis can be performed based on the multiple groups of data obtained, and the electrical performance of 0BB battery cells can be determined based on the analysis results, thereby effectively improving the accuracy of electrical performance testing of 0BB battery cells.

[0071] Furthermore, the following is a detailed introduction on how to perform linear analysis on the first electrical performance test parameter and the second electrical performance test parameter to determine the electrical performance of the 0BB battery cell. The solution specifically includes:

[0072] According to the first electrical performance test parameter and the second electrical performance test parameter corresponding to the main-grid battery cell, the first electrical performance slope corresponding to the main-grid battery cell is determined; according to the first electrical performance test parameter and the second electrical performance test parameter corresponding to the 0BB battery cell, the second electrical performance slope corresponding to the 0BB battery cell is determined; according to the first slope and the second slope, the parameter correction value of the 0BB battery cell is determined; according to the parameter correction value of the 0BB battery cell, the electrical performance of the 0BB battery cell is determined.

[0073] Specifically, through the analysis of the data in Table 1, it can be seen that only Isc needs to be corrected. Therefore, the first slope of the electrical performance corresponding to the main grid cell is the first slope of Isc; the second slope of the electrical performance corresponding to the 0BB cell is the second slope of Isc.

[0074] The following is an introduction to the correction process of Isc correction:

[0075] a. Preparation before testing: one pack of conventional 16BB mainstream battery cells, at least 10 0BB different pattern battery cells, 14 pairs of probes, one Fraunhofer second-standard battery cell, and one set of monitoring sheets;

[0076] b. 4 pairs of probe row test: Use the production line IV offline tester (automatic HALM offline tester), change the probe row to 4 pairs, use the monitoring film to test the dynamic and static state to ensure the machine stability is qualified, use the second standard battery cell to calibrate the machine, and test 16BB and 0BB battery cells;

[0077] c. 14 pairs of probe row test: Change the probe row to 14 pairs, use monitoring film to test dynamic and static, ensure the machine stability is qualified, use second-standard battery cells to calibrate the machine, test 16BB and 0BB battery cells, and create table 2 for test data.

[0078] d. Processing data: Current correction value = 14*(slope(Isc of conventional standard battery vs number of platform probes)-slope(Isc of 0BB battery vs number of platform probes))

[0079] e. Current correction process: The current correction values ​​of different 0BB pattern cells are different. The equipment is arranged with 14 pairs of probes. The machine is calibrated with two-standard cells. After testing the conventional 16BB mainstream cell, the machine is calibrated with two-standard cells. When calibrating the current, current correction (add 0.103 mA) is performed to test 0BB-A, current correction (add 0.089 mA) is performed to test 0BB-B, and current correction (add 0.100 mA) is performed to test 0BB-C.

[0080] Table 2 Isc correction for 4 and 14 probe pairs (correction value = slope * 14 (16BB-0BB))

[0081] 1) Battery Cell 4 pairs 14 pairs intercept Slope Slope*14 Correction value 16BB 13.697 13.702 13.6944 0.0005 0.007 0 0BB-A 13.778 13.710 13.8049 -0.068 -0.952 0.959 0BB-B 13.750 13.692 13.7734 -0.058 -0.812 0.819 0BB-C 13.766 13.701 13.793 -0.065 -0.910 0.917

[0082] The above is a process of testing and analyzing the main grid cell and the 0BB cell using 4 pairs and 14 pairs of probe rows respectively. It should be noted that: during the test process, the main grid cell and the 0BB cell can also be tested by other number of probe rows respectively, and the present invention does not limit this. Therefore, through the analysis of Table 2, the present invention provides a method for calculating the parameter correction value of the 0BB cell, which is:

[0083] Parameter correction value = i*(A1-A2);

[0084] Wherein, A1 is the first slope, A2 is the second slope; i is the number of probe rows;

[0085] A1=(Isc Q,i -Isc Q,q ) / (iq);

[0086] A2=(Isc H,i -Isc H,q ) / (iq);

[0087] Where Q is a battery with a main grid, H is a 0BB battery, i and q represent the number of probe rows, and i>q; Isc Q,i It represents the short-circuit current of the main grid battery Q tested with the number of probe rows i, Isc H,i It represents the short-circuit current of 0BB battery tested with probe row number i; Isc Q,q It represents the short-circuit current of the main grid battery Q tested with the number of probe rows q, Isc H,q It represents the short-circuit current of 0BB battery tested with q probe rows.

[0088] The electrical performance testing method of the 0BB battery cell provided by the present invention is to use the current correction value = i*{(Isc Q,i -Isc Q,q ) / (iq)-(Isc H,i -Isc H,q ) / (iq)}, the actual electrical performance value of 0BB battery can be tested. This method is fast, easy to operate and convenient, and has almost no requirements for IV testers. One device can meet the testing needs of 0BB battery cells with different patterns, and no other test fixtures need to be customized. In addition, the test takes a short time and is low in cost. Testing 0BB battery cells does not require modification of the machine, and only 6 pairs of probe rows need to be prepared.

[0089] The electrical performance testing device for the 0BB battery cell provided by the present invention is described below. The electrical performance testing device for the 0BB battery cell described below and the electrical performance testing method for the 0BB battery cell described above can be referenced to each other.

[0090] Figure 2 The electrical performance test device structure diagram of the 0BB battery cell provided by the present invention is as follows: Figure 2 As shown, the device comprises:

[0091] The test unit 201 is used to test the main-grid battery cell and the 0BB battery cell respectively;

[0092] An acquisition unit 202 is used to obtain the electrical performance test parameters of the main grid cell and the electrical performance test parameters of the 0BB cell;

[0093] The determination unit 203 is used to determine the electrical performance of the 0BB battery cell according to the electrical performance test parameters of the busbar battery cell and the electrical performance test parameters of the 0BB battery cell.

[0094] Figure 3 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 3 As shown, the electronic device may include: a processor 310, a communication interface 320, a memory 330 and a communication bus 340, wherein the processor 310, the communication interface 320 and the memory 330 communicate with each other through the communication bus 340. The processor 310 may call the logic instructions in the memory 330 to execute the electrical performance test method of the 0BB battery cell, and the method includes:

[0095] Step 1: Test the main-grid battery cell and the 0BB battery cell respectively, and obtain the electrical performance test parameters of the main-grid battery cell and the electrical performance test parameters of the 0BB battery cell accordingly;

[0096] Step 2: Determine the electrical performance of the 0BB cell based on the electrical performance test parameters of the main-grid cell and the electrical performance test parameters of the 0BB cell.

[0097] In addition, the logic instructions in the above-mentioned memory 330 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0098] On the other hand, the present invention further provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the electrical performance test method of the 0BB battery cell provided by the above methods, and the method includes:

[0099] Step 1: Test the main-grid battery cell and the 0BB battery cell respectively, and obtain the electrical performance test parameters of the main-grid battery cell and the electrical performance test parameters of the 0BB battery cell accordingly;

[0100] Step 2: Determine the electrical performance of the 0BB cell based on the electrical performance test parameters of the main-grid cell and the electrical performance test parameters of the 0BB cell.

[0101] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by a processor to perform the electrical performance test method of the 0BB battery cell provided by the above methods, the method comprising:

[0102] Step 1: Test the main-grid battery cell and the 0BB battery cell respectively, and obtain the electrical performance test parameters of the main-grid battery cell and the electrical performance test parameters of the 0BB battery cell accordingly;

[0103] Step 2: Determine the electrical performance of the 0BB cell based on the electrical performance test parameters of the main-grid cell and the electrical performance test parameters of the 0BB cell.

[0104] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for testing the electrical performance of an 0BB battery cell, characterized in that: include: Step 1: Test the main-grid battery cell and the 0BB battery cell respectively, and obtain the electrical performance test parameters of the main-grid battery cell and the electrical performance test parameters of the 0BB battery cell accordingly; Step 2: Determine the electrical performance of the 0BB cell according to the electrical performance test parameters of the main-grid cell and the electrical performance test parameters of the 0BB cell.

2. The electrical performance testing method of the 0BB battery cell according to claim 1, characterized in that: Before step 1, it also includes: Using a first number of probe rows of an IV tester, the IV tester is calibrated with main-grid battery labels, and the main-grid battery sheet and the 0BB battery sheet are tested respectively with the calibrated IV tester; The second number of probe rows of the IV tester are used to calibrate the IV tester with the main grid battery label, and the main grid battery sheet and the 0BB battery sheet are tested respectively with the calibrated IV tester.

3. The electrical performance testing method of the 0BB battery sheet according to claim 1 or 2, characterized in that: The step one comprises: Using a first number of probe rows of an IV tester to test the main-grid battery cell and the 0BB battery cell respectively, and measuring the first electrical performance test parameters corresponding to the main-grid battery cell and the first electrical performance test parameters corresponding to the 0BB battery cell; The second number of probe rows of the IV tester are used to test the main-grid battery cell and the 0BB battery cell again, respectively, to obtain the second electrical performance test parameters corresponding to the main-grid battery cell and the second electrical performance test parameters corresponding to the 0BB battery cell.

4. The electrical performance testing method of 0BB battery sheet according to claim 3, characterized in that: The second step comprises: Perform a linear analysis on the first electrical performance test parameter and the second electrical performance test parameter, and determine the electrical performance of the 0BB battery cell according to the analysis results.

5. The electrical performance testing method of 0BB battery sheet according to claim 4, characterized in that: The performing linear analysis on the first electrical performance test parameter and the second electrical performance test parameter, and determining the electrical performance of the 0BB battery cell according to the analysis results includes: Determine a first slope of electrical performance corresponding to the main-grid battery according to a first electrical performance test parameter and a second electrical performance test parameter corresponding to the main-grid battery sheet; Determine the second slope of the electrical performance corresponding to the 0BB battery cell according to the first electrical performance test parameter and the second electrical performance test parameter corresponding to the 0BB battery cell; Determine a parameter correction value of the 0BB battery cell according to the first slope and the second slope; The electrical performance of the 0BB battery cell is determined according to the parameter correction value of the 0BB battery cell.

6. The electrical performance testing method of 0BB battery sheet according to claim 5, characterized in that: Determining the parameter correction value of the 0BB battery cell according to the first slope and the second slope includes: Determine the parameter correction value of 0BB battery according to the following formula: Parameter correction value = i*(A1-A2); Wherein, A1 is the first slope, A2 is the second slope; i is the number of probe rows; A1=(Isc Q,i -Isc Q,q ) / (i-q); A2=(Isc H,i -Isc H,q ) / (i-q); Where Q is a battery with a main grid, H is a 0BB battery, i and q represent the number of probe rows, and i>q; Isc Q,i It represents the short-circuit current of the main grid battery Q tested with the number of probe rows i, Isc H,i It represents the short-circuit current of 0BB battery tested with probe row number i; Isc Q,q It represents the short-circuit current of the main grid battery Q tested with the number of probe rows q, Isc H,q It represents the short-circuit current of 0BB battery tested with q probe rows.

7. A device for executing the electrical performance testing method of 0BB battery cell according to claim 1, characterized in that: include: A test unit, used to test main-grid cells and 0BB cells respectively; An acquisition unit, used to obtain the electrical performance test parameters of the main grid battery cell and the electrical performance test parameters of the 0BB battery cell; The determination unit is used to determine the electrical performance of the 0BB battery cell according to the electrical performance test parameters of the main grid battery cell and the electrical performance test parameters of the 0BB battery cell.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the electrical performance testing method of the 0BB battery as described in any one of claims 1 to 6 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the electrical performance testing method of the 0BB battery as described in any one of claims 1 to 6 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the electrical performance testing method of the 0BB battery cell as described in any one of claims 1 to 6 is implemented.

Images