IV test calibration device

Abstract

The utility model relates to an IV test calibration device. The IV test calibration device comprises a test camera obscura, a standard sheet storage mechanism, an IV test machine and calibration equipment, wherein a test area is arranged in the test camera obscura. And the standard piece storage mechanism is arranged in the test camera obscura and has a closed state for sealing and storing the standard battery pieces and a starting state for transferring the standard battery pieces to the test area. And the IV testing machine is used for performing IV testing on the standard battery piece entering the testing area and outputting a corresponding IV testing measured value. And the calibration equipment is electrically connected with the IV testing machine, stores an IV testing standard value corresponding to the standard battery piece, and can receive the IV testing measured value and correct the coefficient of the IV testing machine when the difference value between the IV testing measured value and the IV testing standard value is greater than a preset value. According to the IV test calibration device, the calibration accuracy of the IV test machine is improved, and the labor cost and time consumption are reduced.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to an IV test calibration device. Background Art

[0002] After solar cell production is complete, IV testing is required to ensure cell quality. IV testing, or current-voltage characteristic curve testing, is a key indicator of solar cell performance. It measures the cell's current-voltage (IV) characteristic curve under different lighting and temperature conditions to assess key parameters such as cell conversion efficiency and power output.

[0003] The correct coefficient of the IV tester is the key to ensuring the accuracy of the IV test, so the IV tester needs to be calibrated at regular intervals. In related technologies, staff transport standard battery cells to the test station through the assembly line of the production line. The IV tester tests the standard battery cells to obtain the actual measured value. The staff then calibrates the coefficient of the IV tester based on the deviation between the actual measured value and the standard value. However, during long-term use, the standard battery cells will experience irreversible factors such as wear, oxidation, and dark decay, which will cause the standard of the standard battery cells to be distorted. At the same time, during the calibration process, there is also an instantaneous temperature difference before and after the standard battery cells enter the test area, which affects the calibration results. In addition, manual calibration by staff depends entirely on the staff's personal operating level and understanding of the various coefficients, which has a large degree of uncertainty and randomness, and also increases labor costs. Utility Model Content

[0004] Based on this, it is necessary to provide an IV test calibration device to improve the calibration accuracy of the IV tester.

[0005] The present application provides an IV test calibration device, comprising:

[0006] A test dark box, wherein a test area is provided in the test dark box;

[0007] a standard cell storage mechanism, the standard cell storage mechanism being disposed in the test dark box, the standard cell storage mechanism having a closed state for sealing standard cells and an activated state for transferring the standard cells to the test area;

[0008] An IV tester is used to perform IV testing on standard cells entering the test area and output corresponding IV test values; and

[0009] A calibration device is electrically connected to the IV tester, and the calibration device stores the IV test standard value corresponding to the standard battery cell. The calibration device can receive the IV test actual value and correct the coefficient of the IV tester when the difference between the IV test actual value and the IV test standard value is greater than a preset value.

[0010] The technical solution is further described below:

[0011] In one embodiment, the standard film storage mechanism includes a film storage box and a pushing component retractably arranged in the film storage box. In the closed state, the pushing component accommodates the standard battery film in the film storage box; in the started state, the pushing component pushes the standard battery film out of the film storage box and pushes it to the test area.

[0012] In one embodiment, the cell storage box includes a box body and a cover body, one end of the box body is provided with an opening for the standard battery cell to enter and exit, the opening faces the test area, and the cover body is openably arranged at the open end of the box body. In the closed state, the cover body closes the opening, and in the started state, the cover body opens the opening.

[0013] In one embodiment, the pushing assembly includes a push rod with a telescopic function, one end of which is connected to the box body, and the push rod is used to connect with the standard battery cell. In the closed state, the push rod and the standard battery cell are accommodated in the box body; in the started state, the push rod pushes the standard battery cell from the opening to the test area.

[0014] In one embodiment, there are two push rods, which are arranged opposite to each other and respectively connected to two sides of the standard battery cell.

[0015] In one embodiment, support columns are provided on opposite sides of the two push rods, and the support columns extend toward the other push rod, and the support columns are used to support the standard battery cell.

[0016] In one embodiment, the IV test calibration device further includes a test circuit connecting the IV test machine and the standard battery cell, and a switch port is provided on the test circuit, and the switch port is used to connect or disconnect the test circuit.

[0017] In one embodiment, the IV test calibration device further includes a test light source, which is disposed in the test darkroom and electrically connected to the IV test machine, and is configured to output test light to the test area.

[0018] In one embodiment, the calibration device includes a display, and the display is used to display the IV test measured value, the IV test standard value, and the difference value.

[0019] In one embodiment, the IV test calibration device also includes an assembly line, which passes through the test area and is used to transport the production line battery cells to the test area and send the production line battery cells out of the test area; the IV testing machine is also used to perform IV testing on the production line battery cells entering the test area.

[0020] In the above-mentioned IV test calibration device, by setting a label storage mechanism in the test dark box, and making the label storage mechanism have a closed state for sealing the standard battery cells and an active state for pushing the standard battery cells to the test area, when the production line is working normally and there is no need to calibrate the IV test machine, by sealing the standard battery cells in the label storage mechanism, the wear, oxidation and dark decay of the standard battery cells due to long-term exposure are reduced, thereby ensuring the stability of the standard battery cells. When the IV test machine needs to be calibrated, the label storage mechanism can automatically push the standard battery cells to the test area, reducing the need for staff to manually load and unload the standard battery cells, thereby saving labor costs and time. At the same time, since the label storage mechanism is set in the test dark box, it ensures that the standard battery cells are always in the test environment in the test dark box, reducing the instantaneous temperature difference during the calibration of the standard battery cells, thereby reducing the calibration error. In addition, the calibration equipment can automatically correct the coefficient of the IV test machine according to the difference between the actual measured value of the IV test and the standard value of the IV test, avoiding the disadvantages of manual calibration by staff, which is completely dependent on the staff's personal operating level and understanding of various coefficients, resulting in large uncertainty and randomness, and further improving the accuracy and stability of calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings that constitute a part of this application are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements are drawn only for illustrative purposes and are not necessarily drawn to true scale.

[0024] Figure 1 FIG. 4 is a schematic structural diagram of an IV test calibration device according to an embodiment.

[0025] Figure 2 FIG. 1 is a structural diagram of a label storage mechanism in an activated state according to an embodiment of the present invention.

[0026] Figure 3 FIG. 1 is a schematic structural diagram of a label storage mechanism in a closed state according to an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 10. Test dark box; 11. Test area; 12. Test light source; 20. Standard film storage mechanism; 21. Film storage cassette; 211. Box body; 212. Cover body; 213. Opening; 22. Pushing assembly; 221. Push rod; 222. Support column; 23. Standard battery cell; 30. IV test machine; 40. Calibration equipment; 50. Assembly line; 51. Production line battery cell; 61. Test circuit; 62. Switch port. DETAILED DESCRIPTION

[0029] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0031] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0032] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0035] An embodiment of the present application provides an IV test calibration device for calibrating an IV tester 30. Specifically, see Figure 1An IV test calibration device according to an embodiment includes a test darkroom 10, a standard sheet storage mechanism 20, an IV test machine 30, and a calibration device 40. A test area 11 is provided in the test darkroom 10. The standard sheet storage mechanism 20 is provided in the test darkroom 10. The standard sheet storage mechanism 20 has a closed state for sealing the standard battery cell 23 and an activated state for transferring the standard battery cell 23 to the test area 11. The IV test machine 30 is used to perform IV testing on the standard battery cell 23 entering the test area 11 and output the corresponding IV test actual value. The calibration device 40 is electrically connected to the IV test machine 30. The calibration device 40 stores the IV test standard value corresponding to the standard battery cell 23. The calibration device 40 can receive the IV test actual value and correct the coefficient of the IV test machine 30 when the difference between the IV test actual value and the IV test standard value is greater than a preset value.

[0036] Specifically, when the production line is in normal production, the standard wafer storage mechanism 20 is in a closed state, and the standard battery cells 23 are sealed in the standard wafer storage mechanism 20. The IV tester 30 performs IV testing on the production line battery cells 51 entering the test area 11.

[0037] Upon receiving a calibration command for the IV tester 30, the production line stops delivering the production line cells 51 to the test area 11. The standard cell storage mechanism 20 transfers the standard cell 23 to the test area 11. The circuit of the IV tester 30 is connected to the standard cell 23, and the IV tester 30 begins to perform an IV test on the standard cell 23 and outputs the corresponding IV test values. The IV test values include, but are not limited to, the measured current value, measured voltage value, and measured fill factor value of the standard cell 23 under certain light and temperature conditions.

[0038] After receiving the actual IV test value from the IV tester 30, the calibration device 40 begins calculating the difference between the actual IV test value and pre-stored IV test standard values. The IV test standard values are not limited to the theoretical current value, theoretical voltage value, and theoretical fill factor of a standard cell 23 under the same lighting and temperature conditions. If the difference between the actual IV test value and the IV test standard value is greater than a preset value, the calibration device 40 adjusts the coefficients of the IV tester 30 until the difference between the actual IV test value and the IV test standard value is less than the preset value. The coefficients of the IV tester 30 include, but are not limited to, the current coefficient used to calculate the current value, the voltage coefficient used to calculate the voltage value, and the fill factor coefficient used to calculate the fill factor. For example, the calibration device 40 may automatically adjust the coefficients of the IV tester 30 using a stored computer program. It should be noted that if the difference between the actual IV test value and the IV test standard value calculated by the calibration device 40 is less than the preset value, no adjustment is required to the coefficients of the IV tester.

[0039] In the above-mentioned IV test calibration device, a standard sheet storage mechanism 20 is provided within the test darkroom 10, and the standard sheet storage mechanism 20 has a closed state for sealing the standard battery cell 23 and an activated state for pushing the standard battery cell 23 to the test area 11. Therefore, when the production line is operating normally and the IV tester 30 does not need to be calibrated, the standard battery cell 23 is sealed in the standard sheet storage mechanism 20, reducing the wear, oxidation, and dark decay of the standard battery cell 23 caused by long-term exposure, thereby ensuring the stability of the standard battery cell 23. When the IV tester 30 needs to be calibrated, the standard sheet storage mechanism 20 can automatically push the standard battery cell 23 to the test area 11, eliminating the need for staff to manually load and unload the standard battery cell 23, thereby saving labor costs and time. At the same time, because the standard sheet storage mechanism 20 is provided within the test darkroom 10, it ensures that the standard battery cell 23 is always in the test environment within the test darkroom 10, reducing the instantaneous temperature difference of the standard battery cell 23 during calibration, thereby reducing calibration errors. In addition, the calibration device 40 can automatically correct the coefficient of the IV test machine 30 according to the difference between the actual measured value of the IV test and the standard value of the IV test, avoiding the disadvantages of manual calibration by staff that is completely dependent on the staff's personal operating level and understanding of various coefficients, which brings about large uncertainty and randomness, and further improves the accuracy and stability of calibration.

[0040] Continue to see Figure 1 In one embodiment, the IV test calibration device further includes an assembly line 50 that passes through the test area 11. The assembly line 50 is used to transport production line cells 51 to the test area 11 and to transport production line cells 51 out of the test area 11. The IV tester 30 is also used to perform IV testing on the production line cells 51 that enter the test area 11. Specifically, when the IV tester 30 is operating normally and does not require calibration, the assembly line 50 transports the production line cells 51 to the test area 11 within the test darkroom 10 for IV testing. When calibration of the IV tester 30 is required, the assembly line 50 stops transporting the production line cells 51, and the IV tester 30 disconnects from the production line cells 51. The standard cell storage mechanism 20 pushes the standard cell 23 into the test area 11, and the IV tester 30 connects to the standard cell 23 for IV testing. In this way, the IV tester 30 can be calibrated in real time on the production line.

[0041] See also Figure 1In one embodiment, the standard cell storage mechanism 20 includes a cell cassette 21 and a push assembly 22 retractably disposed within the cell cassette 21. In the closed state, the push assembly 22 receives the standard cell 23 within the cell cassette 21, thereby sealing the standard cell 23 and reducing wear, oxidation, and dark decay of the standard cell 23. In the activated state, the push assembly 22 pushes the standard cell 23 out of the cell cassette 21 and into the testing area 11, where it undergoes IV testing.

[0042] See also Figure 2 as well as Figure 3 In this embodiment, the cell storage cassette 21 includes a body 211 and a cover 212. An opening 213 for the standard cell 23 to enter and exit is defined at one end of the body 211. The opening 213 faces the testing area 11. The cover 212 is closable and disposed at the open end of the body 211. When closed, the cover 212 seals the opening 213, thereby ensuring that the standard cell 23 is sealed. When activated, the cover 212 opens the opening 213, allowing the push assembly 22 to push the standard cell 23 through the opening 213 to the testing area 11.

[0043] Continue to see Figure 2 In one embodiment, the pushing assembly 22 includes a push rod 221 with a telescopic function. For example, the push rod 221 can be an electric push rod or a hydraulic push rod. One end of the push rod 221 is connected to the box body 211. The push rod 221 is used to connect with the standard battery cell 23. In the closed state, the push rod 221 and the standard battery cell 23 are both accommodated in the box body 211; in the started state, the push rod 221 pushes the standard battery cell 23 from the opening 213 to the test area 11.

[0044] Furthermore, there are two push rods 221 , which are arranged opposite to each other and respectively connected to both sides of the standard battery cell 23 , thereby ensuring that the forces on both sides of the standard battery cell 23 are balanced and preventing the standard battery cell 23 from accidentally falling during the pushing process.

[0045] Furthermore, support columns 222 are provided on opposite sides of the two push rods 221. The support columns 222 extend toward the other push rod 221 and are used to support the standard battery cell 23. The support columns 222 support the standard battery cell 23, thereby improving the stability of the connection between the push rod 221 and the standard battery cell 23. For example, each push rod 221 is provided with at least two support columns 222, each of which is spaced apart along the length of the push rod 221, thereby further improving the support stability of the standard battery cell 23.

[0046] See also Figure 1The IV test calibration device also includes a test circuit 61 connecting the IV tester 30 and the standard battery cell 23. A switch port 62 is provided on the test circuit 61, and the switch port 62 is used to connect or disconnect the test circuit 61. Specifically, the IV tester 30 can selectively connect the production line battery cell 51 and the standard battery cell 23. When the production line is operating normally, the IV tester 30 connects to the production line battery cell 51 and disconnects from the standard battery cell 23 through the switch port 62, thereby performing IV testing on the production line battery cell 51. When an automatic calibration instruction is received, the IV tester 30 disconnects from the production line battery cell 51 and connects the test circuit 61 connected to the standard battery cell 23 through the switch port 62, thereby connecting the standard battery cell 23.

[0047] See also Figure 1 In one embodiment, the IV test calibration device further includes a test light source 12, which is disposed within the test darkroom 10 and electrically connected to the IV tester 30. The test light source 12 is configured to output test light to the test area 11. For example, a simulated light source is disposed above the test area 11. By outputting test light from the test light source 12 to the test area 11, the scene of sunlight irradiating the solar cells can be simulated within the test darkroom 10.

[0048] Optionally, in one embodiment, the calibration device 40 includes a display for displaying the measured IV test values, the IV test standard values, and the difference values. This allows personnel to more intuitively view the test data, facilitating control of the testing process. Furthermore, the IV test standard values and a computer program for correcting the coefficients of the IV tester 30 are stored on the display. Automatic correction of the IV test coefficients can be achieved by running the computer program and invoking the IV test standard values.

[0049] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An IV test calibration device, characterized in that: include: A test dark box (10), wherein a test area (11) is provided in the test dark box (10); a standard cell storage mechanism (20), the standard cell storage mechanism (20) being arranged in the test dark box (10), the standard cell storage mechanism (20) having a closed state for sealing the standard cell (23) and an activated state for transferring the standard cell (23) to the test area (11); An IV testing machine (30) is used to perform an IV test on a standard battery cell (23) entering the test area (11) and output a corresponding IV test measured value; as well as A calibration device (40) is electrically connected to the IV test machine (30), and the calibration device (40) stores an IV test standard value corresponding to the standard battery cell (23). The calibration device (40) is capable of receiving the IV test actual value and correcting the coefficient of the IV test machine (30) when the difference between the IV test actual value and the IV test standard value is greater than a preset value.

2. The IV test calibration device according to claim 1, characterized in that The standard cell storage mechanism (20) comprises a cell storage cassette (21) and a pushing assembly (22) retractably arranged in the cell storage cassette (21). In the closed state, the pushing assembly (22) accommodates the standard cell (23) in the cell storage cassette (21); in the activated state, the pushing assembly (22) pushes the standard cell (23) out of the cell storage cassette (21) and into the test area (11).

3. The IV test calibration device according to claim 2, characterized in that The film storage cassette (21) comprises a box body (211) and a cover body (212). One end of the box body (211) is provided with an opening (213) for allowing the standard battery cell (23) to enter and exit, and the opening (213) faces the test area (11). The cover body (212) is arranged at the open end of the box body (211) in an openable and closable manner. In the closed state, the cover body (212) closes the opening (213). In the activated state, the cover body (212) opens the opening (213).

4. The IV test calibration device according to claim 3, characterized in that: The pushing assembly (22) comprises a push rod (221) with a telescopic function, one end of the push rod (221) is connected to the box body (211), and the push rod (221) is used to connect to the standard battery cell (23). In the closed state, the push rod (221) and the standard battery cell (23) are both accommodated in the box body (211); in the activated state, the push rod (221) pushes the standard battery cell (23) from the opening (213) to the test area (11).

5. The IV test calibration device according to claim 4, characterized in that: There are two push rods (221), and the two push rods (221) are arranged opposite to each other and are respectively connected to two sides of the standard battery sheet (23).

6. The IV test calibration device according to claim 5, characterized in that: Support columns (222) are provided on opposite sides of the two push rods (221), and the support columns (222) extend in a direction close to the other push rod (221). The support columns (222) are used to support the standard battery cell (23).

7. The IV test calibration device according to claim 1, characterized in that: The IV test calibration device further comprises a test circuit (61) connecting the IV test machine (30) and the standard battery cell (23), wherein a switch port (62) is provided on the test circuit (61), and the switch port (62) is used to connect or disconnect the test circuit (61).

8. The IV test calibration device according to claim 1, wherein: The IV test calibration device further includes a test light source (12), which is disposed in the test dark box (10) and electrically connected to the IV test machine (30), and is used to output test light to the test area (11).

9. The IV test calibration device according to claim 1, characterized in that: The calibration device (40) comprises a display, and the display is used to display the IV test measured value, the IV test standard value, and the difference value.

10. The IV test calibration device according to any one of claims 1 to 9, characterized in that: The IV test calibration device further includes an assembly line (50), wherein the assembly line (50) passes through the test area (11), and the assembly line (50) is used to transport the production line battery cells (51) to the test area (11) and to transport the production line battery cells (51) out of the test area (11); the IV test machine (30) is also used to perform IV testing on the production line battery cells (51) entering the test area (11).

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