Acetic acid test device for crystalline silicon solar cell

Abstract

The utility model discloses an acetic acid test device for a silicon crystal solar cell, and relates to the technical field of acidity detection, the acetic acid test device comprises a reaction box and a generation assembly, a sample placing basket is arranged in the reaction box, two baffles are arranged on the circumferential inner wall of the reaction box, the sample placing basket is located between the two baffles, and each baffle is provided with a plurality of circulation grooves; the circulating grooves are evenly arranged at intervals along the side faces of the corresponding baffles, an exhaust pipe is arranged at one end of the reaction box in a penetrating mode, and the generating assembly is arranged at the other end of the reaction box. According to the method, the problem that the identification performance of the solar cell acetic acid test is reduced is solved, the method has the effect of high identification degree, the risk that the performance of the solar cell is wrongly judged is reduced, and the identification performance of the test is improved.

Description

Technical Field

[0001] The present application relates to the technical field of acidity detection, and in particular to an acetic acid testing device for silicon crystal solar cells. Background Art

[0002] Silicon crystal solar cells are a common solar cell technology. Silicon crystal solar cells use silicon crystal materials. Silicon crystal solar cells use the good light response effect of silicon crystal materials to convert solar energy into electrical energy.

[0003] The acetic acid test device for silicon crystalline solar cells includes a reaction box and a generating component for generating acidic gas in the reaction box. When the acetic acid test of silicon crystalline solar cells is performed, acidic gas is generated in the reaction box through the generating component, that is, acetic acid is used to simulate an acidic environment, and then different silicon crystalline solar cells are placed in the reaction box, even if the silicon crystalline solar cells are in an acidic environment for a period of time, and the percentage of EFF attenuation of the cell is obtained by measuring the EFF of the solar cell before and after the test. EFF refers to the efficiency of the cell, which represents the ability of the cell to convert solar energy into electrical energy. It is an important indicator for judging the performance of the cell. Therefore, if the percentage of EFF attenuation of the solar cell in the same environment and time is smaller, the performance of the solar cell is better. Therefore, the performance scores of different solar cells are compared through the acetic acid test.

[0004] Generally, in order to improve the accuracy of the test, multiple solar cells of the same type are placed in the reaction box at the same time, and then the performance of the solar cells is judged by the average value of the EFF attenuation percentage of the same solar cells. However, due to the different flow rates and concentrations of acidic gases in different areas of the reaction box, the difference in the EFF attenuation percentage between the same solar cells is large, making it impossible to accurately judge the performance of the solar cells using the average value of the EFF attenuation percentage of the solar cells, increasing the risk of misjudgment of the performance of the solar cells, thereby reducing the discriminability of the test. Utility Model Content

[0005] The purpose of the present application is to provide an acetic acid test device for silicon crystal solar cells, in order to solve the problem of reduced identification of acetic acid tests on solar cells.

[0006] The present application provides an acetic acid test device for silicon crystalline solar cells using the following technical solution:

[0007] An acetic acid test device for silicon crystal solar cell sheets comprises a reaction box and a generating assembly, wherein a sample placement basket is arranged in the reaction box, two baffles are arranged on the circumferential inner wall of the reaction box, the sample placement basket is located between the two baffles, the baffles are provided with a plurality of flow grooves, and the plurality of flow grooves are evenly spaced along the side surfaces of the corresponding baffles, an exhaust pipe is passed through one end of the reaction box, and the generating assembly is arranged at the other end of the reaction box.

[0008] By adopting the above technical solution, when it is necessary to conduct an acetic acid test on the solar cell, the solar cell is placed in a sample placement basket, and then acid gas is generated in the reaction box through the generating assembly, that is, the acid environment is simulated in the reaction box, that is, the solar cell is in the acid environment for a period of time, and the percentage of EFF attenuation of the solar cell is obtained by measuring the EFF of the solar cell before and after the test.

[0009] During the reaction of solar cells in an acidic environment, an exhaust pipe is provided at one end of the reaction box, a generating assembly is installed at the other end of the reaction box, and two baffles are installed on the circumferential inner wall of the reaction box, and a plurality of flow slots are opened on the baffles. Therefore, the movement path of the acid gas is generated from one end of the reaction box, and then enters between the two baffles through the flow slot of one of the baffles, flows between the two baffles, and then flows out through the flow slot of the other baffle, and then reaches one end of the reaction box and is discharged through the exhaust pipe.

[0010] When the acid gas passes through the flow slot on one baffle, and the multiple flow slots are evenly spaced along the side of the baffle, the acid gas enters between the two baffles through the corresponding flow slots at the same flow rate. Similarly, when the acid gas is discharged through the flow slot on the other baffle, the acid gas is also discharged from between the two baffles through the corresponding flow slots at the same flow rate, so that the flow rate of the acid gas between the two baffles is the same and stable. The sample placement basket is located between the two baffles, and the solar cell is placed in the sample placement basket, so that the acid gas can pass through each solar cell at a stable and same flow rate, so that the flow rate and concentration of the acid gas in the part where each solar cell is located are the same, so that the error of the EFF attenuation percentage of the solar cell is reduced, thereby reducing the difference in the EFF attenuation percentage between the same type of solar cells, so that the average value of the EFF attenuation percentage of the solar cell can be closer to the actual value, reducing the risk of incorrect performance judgment of the solar cell, thereby improving the discriminability of the test.

[0011] Optionally, a three-way valve is provided at one end of the exhaust pipe away from the reaction box, and the three-way valve is provided with a first air outlet pipe and a second air outlet pipe, and one end of the first air outlet pipe is penetrated on the circumferential side wall of the reaction box.

[0012] By adopting the above technical solution, when the solar cell is placed in the reaction box for reaction, the first gas outlet pipe is opened and the second gas outlet pipe is closed through the three-way valve, so that the first gas outlet pipe is connected with the exhaust pipe, and the acid gas that has reacted with the solar cell but not completely reacted passes through the exhaust pipe and then enters the first gas outlet pipe through the three-way valve. One end of the first gas outlet pipe is penetrated on the circumferential side wall of the reaction box and is located at the end of the reaction box away from the exhaust pipe, so that the acid gas passes through the two baffles again and reacts with the solar cell in the sample placement basket, thereby realizing the internal circulation inside the reaction box, that is, the acid gas fully reacts with the solar cell, thereby increasing the EFF attenuation percentage of the solar cell, making the test result closer to the actual value, reducing the risk of incorrect performance judgment of the solar cell, and thus improving the identification of the test and the accuracy of the test data.

[0013] Optionally, an exhaust fan is provided at one end of the exhaust pipe away from the three-way valve.

[0014] By adopting the above technical solution, the exhaust fan can accelerate the circulation of gas in the reaction box and form an internal circulation in the reaction box through the three-way valve, so that the gas and the solar cell fully react, while increasing the EFF attenuation percentage of the solar cell and reducing the error of the EFF attenuation percentage of the solar cell, so that the average value of the EFF attenuation percentage of the solar cell can be closer to the actual value, reducing the risk of misjudgment of the performance of the solar cell and improving the distinctiveness of the test.

[0015] Optionally, a top cover is provided at one end of the reaction box, the top cover is provided in an inverted V shape, and the exhaust pipe is passed through the top cover.

[0016] By adopting the above technical solution, when acidic gas is discharged from the exhaust pipe, dew drops will form on the circumferential inner wall of the top cover. The top cover is in an inverted V shape, and the dew drops will slide along the circumferential side walls of the top cover to the circumferential inner wall of the reaction box, thereby reducing the risk of dew drops dripping onto the solar cell panels and causing errors in the test results, thereby improving the accuracy of the test.

[0017] Optionally, a partition is provided on the circumferential inner wall of the reaction box, and the reaction box is divided into a reaction chamber and a heating chamber by the partition. The generating component includes a corrosion liquid dish arranged on the partition and a heater arranged in the heating chamber. The corrosion liquid dish and the baffle are both arranged in the reaction chamber, and the exhaust pipe is connected to the reaction chamber.

[0018] By adopting the above technical scheme, an acetic acid solution is placed in a corrosion liquid dish. When it is necessary to generate acidic gas in the reaction box, that is, to provide a simulated acidic environment for the solar cell, the heater is started, the heater generates heat, the partition is made of a heat-conducting material, so that the heater heats the partition, the corrosion liquid dish is installed on the partition and is made of a heat-conducting material, the partition heats the corrosion liquid dish, that is, the acetic acid solution in the corrosion liquid dish is heated, the acetic acid solution evaporates in the reaction chamber to generate acidic gas, and a sample placement basket with solar cells is installed in the reaction chamber, thereby providing a simulated acidic environment for the solar cell, wherein the reaction box is divided into a reaction chamber and a heating chamber by the partition, and the heater is installed in the heating chamber, thereby preventing the acidic environment from affecting the use of the heater, reducing the risk of damage to the heater, and improving the stability of the device.

[0019] Optionally, the circumferential side wall of the reaction box is provided with an opening and closing groove, the reaction box is provided with an opening and closing plate for covering the notch of the opening and closing groove, the groove wall of the opening and closing groove is provided with a groove, and the opening and closing plate is provided with an elastic block cooperating with the groove.

[0020] By adopting the above technical scheme, when it is necessary to close the opening and closing groove for testing, the opening and closing plate is used to cover the notch of the opening and closing groove, and the opening and closing plate is rotated. During this process, the groove wall of the opening and closing groove exerts pressure on the elastic block. The elastic block is made of corrosion-resistant elastic material. The elastic block is elastically deformed under force and maintains a tendency to reset. When the opening and closing plate completely covers the notch of the opening and closing groove, the elastic block moves to the groove and resets, so that the elastic block is plugged into the groove. The groove wall of the groove limits the displacement of the elastic block, thereby fixing the opening and closing plate, and then the solar cell can be tested.

[0021] When it is necessary to open the opening and closing plate, a pulling force is applied to the opening and closing plate, and the groove wall of the groove applies pressure to the elastic block. The elastic block is elastically deformed under the force, thereby canceling the plug-in fit between the elastic block and the groove. Even if the opening and closing plate is rotated in a direction away from the sample placement basket with the rotation point of the opening and closing plate and the opening and closing groove as the center, the opening of the opening and closing groove is realized, and then the solar cell can be placed in or taken out of the sample placement basket.

[0022] The setting of the opening and closing groove makes it easy to put in and take out the solar cell. At the same time, the plug-in cooperation between the elastic block and the groove makes the opening and closing operation of the opening and closing groove simple and convenient, thereby improving the convenience of using the device.

[0023] Optionally, a sliding rod is provided in the reaction box, the sliding rod is slidably connected to two clamping plates, the sample placement basket is arranged between the two clamping plates, and the sliding rod is provided with a driving component for driving the two clamping plates to move towards each other.

[0024] By adopting the above technical solution, the solar cell is placed in the sample placement basket, and then the sample placement basket is placed in the reaction box through the opening and closing slot, and the sample placement basket is located between the two clamping plates, and then the two clamping plates are moved toward each other through the driving component until the facing sides of the two clamping plates abut against one side of the sample placement basket, thereby fixing the sample placement basket, and then the solar cell in the sample placement basket can be tested.

[0025] The cooperation between the clamping plate and the driving assembly makes the sample placement basket detachable, which makes it easier to place the solar cell and improves the convenience of using the device. At the same time, the driving assembly makes the distance between the two clamping plates adjustable, so that the device can clamp sample placement baskets of different specifications, that is, fix the sample placement basket, which improves the practicality of the device.

[0026] Optionally, the driving assembly includes a sliding groove arranged on the sliding rod and two connecting rods respectively arranged on the corresponding clamping plates. The two connecting rods are both slidingly connected in the sliding groove and are respectively located at two ends of the sliding rod. An elastic member is arranged in the sliding groove for driving the two connecting rods to move in a direction approaching each other.

[0027] By adopting the above technical solution, when two clamping plates are used to clamp the sample placement basket, force is applied to the two clamping plates to make the two clamping plates move away from each other, and the connecting rods are fixedly connected to the corresponding clamping plates, so that the two connecting rods slide in the sliding grooves, and the two connecting rods slide away from each other, and the connecting rod applies a pulling force to one end of the elastic member, and the elastic member is elastically deformed by the force and maintains a tendency to reset until the distance between the two clamping plates is sufficient to place the sample placement basket.

[0028] Then, the sample placement basket with the solar cells is placed between the two clamping plates, and then the force applied to the clamping plates is cancelled, the elastic member is reset, and the elastic member applies a pulling force to the two connecting rods in the direction of approaching each other, that is, the two connecting rods are driven to move in the direction of approaching each other, thereby causing the two clamping plates to move in the direction of approaching each other until the facing sides of the two clamping plates abut against one side of the sample placement basket, thereby clamping and fixing the sample placement basket through the clamping plates, and then the solar cells in the sample placement basket can be tested.

[0029] The sliding groove guides the sliding of the connecting rod, reduces the risk of the movement trajectory of the clamping plate being offset and affecting the clamping and fixing of the sample placement basket, and improves the stability of the device. The elastic member allows the two clamping plates to move toward each other, which is simple and quick to operate, and improves the convenience of using the device.

[0030] Optionally, a limiting groove is provided on the groove wall of the sliding groove, and a limiting block cooperating with the limiting groove is axially arranged on the connecting rod.

[0031] By adopting the above technical solution, when the connecting rod slides in the sliding groove, the limit block slides in the limit groove. The cross-section of the limit block is larger than the groove cross-section of the sliding groove. Therefore, the groove wall of the limit groove limits the sliding distance of the limit block, thereby preventing the limit block from separating from the sliding rod, reducing the risk of the connecting rod detaching from the sliding rod and affecting the use of the device, and improving the stability of the device.

[0032] Optionally, the sample placement basket is provided with a placement groove, a groove wall of the placement groove is provided with a plurality of through grooves, and the two clamping plates are provided with support rods matched with the corresponding through grooves on the opposite sides.

[0033] By adopting the above technical solution, when the facing sides of the two clamping plates abut against one side of the sample placement basket, the support rod is plugged into the corresponding through slot, and the support rod provides supporting force to the slot wall of the through slot, thereby supporting the sample placement basket, and the support rod can limit the displacement of the sample placement basket, reducing the risk of displacement of the sample placement basket during the test and affecting the test, and improving the stability of the device.

[0034] The solar cell is placed in a placement groove of the sample placement basket, and a plurality of barrel grooves are provided on the groove wall, so that dew formed on the solar cell can flow out of the placement groove through the barrel grooves, reducing the risk of dew accumulating in the placement groove and affecting the test results, and improving the accuracy of the test.

[0035] In summary, the present application includes at least one of the following beneficial technical effects:

[0036] 1. Make the average value of the EFF attenuation percentage of the solar cell closer to the actual value, reduce the risk of misjudgment of the performance of the solar cell, and improve the identification of the test;

[0037] 2. Reduce the risk of dew drops falling on the solar cell causing errors in the test results, and improve the accuracy of the test;

[0038] 3. Prevents the acidic environment from affecting the use of the heater, reduces the risk of heater damage, and improves the stability of the device;

[0039] 4. The device can clamp sample baskets of different specifications, that is, fix the sample baskets, thereby improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0041] Figure 2 It is a schematic diagram of the overall cross-sectional structure of an embodiment of the present application;

[0042] Figure 3 This is a schematic diagram of the structure of a sample placement box according to an embodiment of the present application;

[0043] Figure 4 is a schematic diagram of the structure of the clamping plate in an embodiment of the present application;

[0044] Figure 5 is a schematic diagram of the structure of a drive component in an embodiment of the present application;

[0045] Figure 6 This is a schematic diagram of the opening and closing plate structure of an embodiment of the present application;

[0046] Figure 7 It is a schematic diagram of the elastic block structure of an embodiment of the present application.

[0047] Explanation of the reference numerals: 1. reaction box; 2. generating assembly; 3. exhaust fan; 4. three-way valve; 5. baffle; 6. sample placement basket; 7. support plate; 8. clamping plate; 9. driving assembly; 11. partition; 12. reaction chamber; 13. heating chamber; 14. connecting pipe; 15. top cover; 16. opening and closing groove; 17. opening and closing plate; 21. corrosion liquid dish; 22. heater; 41. first air outlet pipe; 42. second air outlet pipe; 51. circulation groove; 61. placement groove; 71. sliding rod; 81. supporting rod; 91. sliding groove; 92. connecting rod; 161. groove; 171. rotating shaft; 172. elastic block; 151. exhaust pipe; 611. through groove; 911. elastic member; 912. limit groove; 921. limit block. DETAILED DESCRIPTION

[0048] The following is combined with Figure 1 -Attached Figure 7 This application is described in further detail.

[0049] The embodiment of the present application discloses an acetic acid testing device for silicon crystalline solar cells.

[0050] Reference Figure 1 and Figure 2 An acetic acid test device for silicon crystal solar cells includes a reaction box 1 and a generating assembly 2. A partition 11 is fixedly connected to the circumferential inner wall of the reaction box 1. The reaction box 1 is divided into a reaction chamber 12 and a heating chamber 13 by the partition 11. The generating assembly 2 is located at one end of the reaction box 1 and is installed in the heating chamber 13.

[0051] Reference Figure 1 and Figure 2The generating assembly 2 includes a corrosion liquid dish 21 installed on the partition 11 and a heater 22 installed in the heating chamber 13. The corrosion liquid dish 21 is located on the side of the partition 11 close to the reaction chamber 12. A connecting pipe 14 connected to the heating chamber 13 is penetrated through the circumferential side wall of the reaction box 1. The partition 11 and the corrosion liquid dish 21 are made of corrosion-resistant heat-conducting materials such as aluminum.

[0052] Reference Figure 1 and Figure 2 A top cover 15 is fixedly connected to one end of the reaction box 1 away from the heating chamber 13 . The top cover 15 is arranged in an inverted V shape. An exhaust pipe 151 is passed through the top cover 15 . The exhaust pipe 151 is connected to the reaction chamber 12 .

[0053] Reference Figure 1 and Figure 2 An exhaust fan 3 is installed at one end of the exhaust pipe 151 close to the reaction box 1, and a three-way valve 4 is installed at the other end. The exhaust pipe 151 is fixedly connected to the air inlet of the three-way valve 4, and the two air outlets of the three-way valve 4 are respectively fixedly connected with a first air outlet pipe 41 and a second air outlet pipe 42. One end of the first air outlet pipe 41 is penetrated on the circumferential side wall of the reaction box 1 and is connected to the reaction chamber 12. One end of the first air outlet pipe 41 is penetrated in the reaction box 1 and is located on the side of the baffle 5 close to the corrosion liquid dish 21.

[0054] Reference Figure 2 and Figure 3 The wall of the reaction chamber 12 is fixedly connected with two baffles 5, and the baffles 5 are provided with a plurality of flow slots 51, and the plurality of flow slots 51 are evenly arranged along the side of the corresponding baffles 5. A sample placement basket 6 is installed in the reaction chamber 12, and the sample placement basket 6 is located between the two baffles 5.

[0055] Reference Figure 3 The chamber wall of the reaction chamber 12 is fixedly connected with two support plates 7 arranged opposite to each other. The two support plates 7 are connected by a sliding rod 71, and both ends of the sliding rod 71 are fixedly connected to the support plates 7 respectively.

[0056] Reference Figure 3 and Figure 4 The sliding rod 71 is slidably connected to two clamping plates 8, and the sample placement basket 6 is located between the two clamping plates 8. The sample placement basket 6 is integrally formed with a placement groove 61, and the groove wall of the placement groove 61 is provided with multiple through grooves 611. The two clamping plates 8 are fixedly connected to the opposite sides with support rods 81 that are plugged into and matched with the corresponding through grooves 611.

[0057] Reference Figure 4 and Figure 5The sliding rod 71 is equipped with a driving assembly 9 for driving the two clamping plates 8 to move toward each other. The driving assembly 9 includes a sliding groove 91 provided on the sliding rod 71 and two connecting rods 92 respectively fixedly connected to the corresponding clamping plates 8.

[0058] Reference Figure 4 and Figure 5 The sliding groove 91 connects the two ends of the sliding rod 71. The two connecting rods 92 are both slidingly connected in the sliding groove 91 and are respectively located at the two ends of the sliding rod 71. An elastic member 911 is installed in the sliding groove 91 for driving the two connecting rods 92 to move toward each other. The elastic member 911 adopts a conventional tension spring, and the two ends of the elastic member 911 are respectively fixedly connected to the corresponding connecting rods 92.

[0059] Reference Figure 5 A limiting groove 912 is provided on the groove wall of the sliding groove 91 , and a limiting block 921 which is axially fixedly connected to the connecting rod 92 and is slidably matched with the limiting groove 912 .

[0060] Reference Figure 6 The circumferential side wall of the reaction box 1 is provided with an opening and closing groove 16 corresponding to the sample placement basket 6 , and the reaction box 1 is equipped with an opening and closing plate 17 for covering the notch of the opening and closing groove 16 .

[0061] Reference Figure 6 A rotating shaft 171 is passed through and fixedly connected to one end of the opening and closing plate 17 , and the rotating shaft 171 is rotatably connected to the groove wall of the opening and closing groove 16 .

[0062] Reference Figure 7 A groove 161 is provided on the wall of the opening and closing groove 16, and an elastic block 172 is fixedly connected to the other end of the opening and closing plate 17. The elastic block 172 is plugged into the groove 161, and the elastic block 172 is made of corrosion-resistant elastic materials such as polytetrafluoroethylene.

[0063] The implementation principle of the acetic acid test device for silicon crystal solar cells in the embodiment of the present application is as follows:

[0064] When the acetic acid test is required for the solar cell, the solar cell is placed in the sample placement basket 6 , and then the sample placement basket 6 is placed into the reaction chamber 12 through the opening and closing slot 16 .

[0065] Then, the sample placement basket 6 is fixed. That is, force is applied to the two clamping plates 8 to make the two clamping plates 8 move away from each other, and the connecting rods 92 are fixedly connected to the corresponding clamping plates 8, so that the two connecting rods 92 slide in the sliding grooves 91, and the two connecting rods 92 slide away from each other, and the connecting rods 92 apply a pulling force to one end of the elastic member 911, and the elastic member 911 is elastically deformed by the force and keeps the tendency to return to the original position until the distance between the two clamping plates 8 is enough to place the sample placement basket 6.

[0066] Thereafter, the sample placement basket 6 with the solar cell sheets is placed between the two clamping plates 8, and then the force applied to the clamping plates 8 is cancelled, the elastic member 911 is reset, and the elastic member 911 applies a pulling force to the two connecting rods 92 in the direction of approaching each other, that is, the two connecting rods 92 are driven to move in the direction of approaching each other, thereby causing the two clamping plates 8 to move in the direction of approaching each other, until the facing sides of the two clamping plates 8 abut against one side of the sample placement basket 6, and the support rod 81 is plugged into the corresponding through groove 611, so that the sample placement basket 6 is clamped and fixed by the clamping plates 8.

[0067] After the sample placement basket 6 is fixed, the opening and closing plate 17 is rotated to cover the notch of the opening and closing groove 16. In this process, the groove wall of the opening and closing groove 16 applies pressure to the elastic block 172. The elastic block 172 is made of corrosion-resistant elastic material. The elastic block 172 is elastically deformed under force and maintains a tendency to reset. When the opening and closing plate 17 completely covers the notch of the opening and closing groove 16, the elastic block 172 moves to the groove 161, and the elastic block 172 is reset, so that the elastic block 172 is plugged into and matched with the groove 161. The groove wall of the groove 161 limits the displacement of the elastic block 172, thereby fixing the opening and closing plate 17, that is, the notch of the opening and closing groove 16 is closed. At the same time, the first air outlet pipe 41 is opened and the second air outlet pipe 42 is closed through the three-way valve 4, so that the first air outlet pipe 41 is connected to the exhaust pipe 151, and the exhaust fan on the exhaust pipe 151 is turned on.

[0068] Afterwards, the solar cell in the sample placement basket 6 can be tested, the heater 22 is started, the heater 22 generates heat, the partition 11 is made of heat-conducting material, so that the heater 22 heats the partition 11, the corrosion liquid dish 21 is installed on the partition 11 and is made of heat-conducting material, the partition 11 heats the corrosion liquid dish 21, the corrosion liquid dish 21 contains an acetic acid solution with a ratio of glacial acetic acid to water of 12:88, that is, the acetic acid solution in the corrosion liquid dish 21 is heated, the acetic acid solution evaporates in the reaction chamber 12 to generate acidic gas, and the sample placement basket 6 with the solar cell is installed in the reaction chamber 12, thereby providing a simulated acidic environment for the solar cell, even if the solar cell is in an acidic environment for a period of time, and the percentage of EFF attenuation of the solar cell is obtained by measuring the EFF of the solar cell before and after the test.

[0069] During the reaction of the solar cell in an acidic environment, an exhaust pipe 151 is provided at one end of the reaction box 1, and the generating assembly 2 is installed at the other end of the reaction box 1. Two baffles 5 are installed on the circumferential inner wall of the reaction box 1, and the baffles 5 are provided with a plurality of flow grooves 51. Therefore, the movement path of the acid gas is generated from one end of the reaction box 1, and then enters between the two baffles 5 through the flow groove 51 of one of the baffles 5, flows between the two baffles 5, and then flows out through the flow groove 51 of the other baffle 5, and then reaches one end of the reaction box 1 and is discharged through the exhaust pipe 151.

[0070] When the acidic gas passes through the flow slot 51 on one baffle 5, and the multiple flow slots 51 are evenly spaced along the side of the baffle 5, the acidic gas enters between the two baffles 5 through the corresponding flow slots 51 at the same flow rate. Similarly, when the acidic gas is discharged through the flow slot 51 on the other baffle 5, the acidic gas is also discharged from between the two baffles 5 through the corresponding flow slots 51 at the same flow rate, so that the flow rate of the acidic gas between the two baffles 5 is the same and stable. The sample placement basket 6 is located between the two baffles 5, and the solar cell is placed in the sample placement basket 6, so that the acidic gas can pass through each solar cell at a stable and same flow rate, so that the flow rate and concentration of the acidic gas in the part where each solar cell is located are the same, so that the error of the EFF attenuation percentage of the solar cell is reduced.

[0071] When conducting the test, the three-way valve 4 opens the first gas outlet pipe 41 and closes the second gas outlet pipe 42, so that the first gas outlet pipe 41 is connected to the exhaust pipe 151, and the acidic gas that has reacted with the solar cell but not completely reacted passes through the exhaust pipe 151 and then enters the first gas outlet pipe 41 through the three-way valve 4. One end of the first gas outlet pipe 41 is penetrated on the circumferential side wall of the reaction box 1 and is located at the end of the reaction box 1 away from the exhaust pipe 151, so that the acidic gas passes through the two baffles 5 again and reacts with the solar cell in the sample placement basket 6, thereby realizing the internal circulation inside the reaction box 1, that is, the acidic gas fully reacts with the solar cell, thereby increasing the EFF attenuation percentage of the solar cell.

[0072] At the same time, the exhaust fan can accelerate the circulation of gas in the reaction box 1 and form an internal circulation in the reaction box 1 through the three-way valve 4, so that the gas and the solar cell fully react, while increasing the EFF attenuation percentage of the solar cell and reducing the error of the EFF attenuation percentage of the solar cell.

[0073] The two baffles 5 are provided with flow slots 51 arranged at even intervals so that the acidic gas can pass through each solar cell at a stable and equal flow rate. At the same time, the internal circulation is realized by the three-way valve 4 and the flow rate of the gas is accelerated by the exhaust fan, so that the acidic gas fully reacts with the solar cell, so that the error of the EFF attenuation percentage of the solar cell is reduced while the EFF attenuation percentage of the solar cell is increased, that is, the difference in the EFF attenuation percentage between the same solar cells is reduced, so that the average value of the EFF attenuation percentage of the solar cell can be closer to the actual value, reducing the risk of misjudgment of the performance of the solar cell, so that the test has a high degree of discrimination. In addition, the operation of testing the solar cell by the device is simple and convenient, which improves the reproducibility of the test.

[0074] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An acetic acid test device for silicon crystal solar cells, comprising a reaction box (1) and a generating assembly (2), characterized in that: A sample placement basket (6) is arranged in the reaction box (1), and two baffles (5) are arranged on the circumferential inner wall of the reaction box (1). The sample placement basket (6) is located between the two baffles (5), and the baffles (5) are provided with a plurality of flow grooves (51). The plurality of flow grooves (51) are arranged at even intervals along the side surfaces of the corresponding baffles (5). An exhaust pipe (151) is passed through one end of the reaction box (1), and the generating assembly (2) is arranged at the other end of the reaction box (1).

2. The acetic acid testing device for silicon crystalline solar cells according to claim 1, characterized in that: A three-way valve (4) is provided at one end of the exhaust pipe (151) facing away from the reaction box (1); the three-way valve (4) is provided with a first outlet pipe (41) and a second outlet pipe (42); one end of the first outlet pipe (41) is passed through the circumferential side wall of the reaction box (1).

3. The acetic acid testing device for silicon crystal solar cells according to claim 2, characterized in that: An exhaust fan is provided at one end of the exhaust pipe (151) away from the three-way valve (4).

4. The acetic acid testing device for silicon crystalline solar cells according to claim 1, characterized in that: A top cover (15) is provided at one end of the reaction box (1), the top cover (15) is arranged in an inverted V shape, and the exhaust pipe (151) is passed through the top cover (15).

5. The acetic acid testing device for silicon crystalline solar cells according to claim 1, characterized in that: The reaction box (1) is provided with a partition (11) on the circumferential inner wall thereof; the reaction box (1) is divided into a reaction chamber (12) and a heating chamber (13) by the partition (11); the generating assembly (2) comprises a corrosion liquid dish (21) arranged on the partition (11) and a heater (22) arranged in the heating chamber (13); the corrosion liquid dish (21) and the baffle (5) are both arranged in the reaction chamber (12); and the exhaust pipe (151) is connected to the reaction chamber (12).

6. The acetic acid testing device for silicon crystalline solar cells according to claim 1, characterized in that: The circumferential side wall of the reaction box (1) is provided with an opening and closing groove (16), the reaction box (1) is provided with an opening and closing plate (17) for covering the notch of the opening and closing groove (16), the groove wall of the opening and closing groove (16) is provided with a groove (161), and the opening and closing plate (17) is provided with an elastic block (172) that cooperates with the groove (161).

7. The acetic acid testing device for silicon crystalline solar cells according to claim 1, characterized in that: A sliding rod (71) is arranged in the reaction box (1), and the sliding rod (71) is slidably connected to two clamping plates (8). The sample placement basket (6) is arranged between the two clamping plates (8), and the sliding rod (71) is provided with a driving component (9) for driving the two clamping plates (8) to move in a direction approaching each other.

8. The acetic acid testing device for silicon crystal solar cells according to claim 7, characterized in that: The driving assembly (9) comprises a sliding groove (91) arranged on the sliding rod (71), and two connecting rods (92) respectively arranged on the corresponding clamping plates (8); the two connecting rods (92) are both slidingly connected in the sliding groove (91) and are respectively located at two ends of the sliding rod (71); and an elastic member (911) is arranged in the sliding groove (91) for driving the two connecting rods (92) to move in a direction approaching each other.

9. The acetic acid testing device for silicon crystal solar cells according to claim 8, characterized in that: The groove wall of the sliding groove (91) is provided with a limiting groove (912), and the connecting rod (92) is axially provided with a limiting block (921) that cooperates with the limiting groove (912).

10. The acetic acid testing device for silicon crystalline solar cells according to claim 8, characterized in that: The sample placement basket (6) is provided with a placement groove (61), the groove wall of the placement groove (61) is provided with a plurality of through grooves (611), and the two clamping plates (8) are provided with support rods (81) matching with the corresponding through grooves (611) on the opposite sides.

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