Equipment for testing acetic acid of photovoltaic cell

Abstract

The utility model discloses a photovoltaic cell acetic acid test device, which relates to the technical field of cell test, and comprises a main box body, a conical opening is arranged at the bottom of the main box body, and an acetic acid bearing frame is arranged in the main box body; an observation opening is formed in the main box body; a collection box; the heating box is installed on the side edge of the main box body and connected with the main box body through a connecting pipeline, and a heating pipe and a driving fan are installed in the heating box; an electric valve is mounted on the connecting pipeline; the rotating rod is transversely mounted in the main box body, and a rotating motor is arranged at the end part of the rotating rod; a transmission assembly is installed on the rotating rod and connected with the acetic acid bearing frame. A temperature detector and a humidity detector; an accommodating cavity and a circulating pump are mounted in the sampling box, and the accommodating cavity is connected with the acetic acid bearing frame by mounting a circulating pipeline; and the air outlet is provided with a control valve and is positioned at the upper end of the main box body, so that the technical problems that a battery piece is inconvenient to observe and the concentration and the temperature of acetic acid are difficult to maintain in a normalized manner are solved.

Description

Technical Field

[0001] This utility model relates to the field of solar cell testing technology, specifically to a device for testing photovoltaic solar cells with acetic acid. Background Technology

[0002] Solar cells are encapsulated in EVA (ethylene-vinyl acetate copolymer) film to form photovoltaic modules. During long-term outdoor exposure, in addition to moisture corrosion, the EVA film degrades to produce acetic acid. Acetic acid can corrode the electrode grid lines and solder ribbons of solar cells, affecting the efficiency and safety performance of solar photovoltaic modules. Therefore, before solar photovoltaic modules leave the factory, the cells need to undergo thorough acid corrosion resistance testing.

[0003] The prior art CN202420354594.5 describes a rapid acetic acid aging test chamber for battery cells, comprising a chamber body, a support component, and a blower component. By adding a certain proportion of acetic acid into the chamber body to simulate environmental acidity, and using a constant temperature chamber to achieve a high temperature in the chamber body, a high-concentration acetic acid environment is formed inside the chamber. The battery cells in the chamber body react uniformly and rapidly with the acetic acid within the device to verify whether the slurry used is qualified. That is, the corrosion test of the battery cells is carried out rapidly by simulating an environment with acetic acid.

[0004] The following problems exist:

[0005] 1. Currently, the simulation experiment time is not unique, ranging from 8 hours to 72 hours. Therefore, the corrosion test of the battery cell should have the effect of random observation.

[0006] 2. Since the test needs to simulate the acidity, temperature and humidity of acetic acid, it is necessary to maintain the concentration and temperature of acetic acid under normal conditions. Therefore, a device is needed to maintain this state continuously, but the existing technology lacks a corresponding structure.

[0007] 3. For the lifting part of the battery cells, the existing equipment uses hydraulic or pneumatic equipment installed inside the equipment to drive it. The driving equipment needs to meet the requirements of a corrosion-resistant environment.

[0008] To address these issues, we provide a device for testing acetic acid in photovoltaic cells. Utility Model Content

[0009] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a device for testing acetic acid in photovoltaic cells, so as to solve the technical problems of inconvenience in observing the cells and difficulty in maintaining acetic acid concentration and temperature under normal conditions.

[0010] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a device for testing acetic acid in photovoltaic cells, comprising:

[0011] The main housing has a conical opening at the bottom and an acetate support frame inside, which is suitable for installing battery cells; an observation port is provided on the main housing.

[0012] The collection box has a discharge pipe installed at the bottom of the conical opening. An electric butterfly valve is installed on the discharge pipe, and the bottom of the discharge pipe is connected to the collection box.

[0013] The heating chamber is installed on the side of the main chamber and connected to it via a connecting pipe. The heating chamber contains heating elements and a drive fan. An electric valve is installed on the connecting pipe. The drive fan draws air in from the outside to the inside.

[0014] A rotating rod is installed horizontally inside the main housing, with its end extending out of the main housing and equipped with a rotating motor. The rotating motor is coaxially connected to the rotating rod. A transmission assembly is installed on the rotating rod and is connected to the acetic acid support frame.

[0015] Temperature and humidity detectors are mounted on the main enclosure, with their detection ends extending into the main enclosure.

[0016] The sampling box contains a receiving chamber and a circulation pump. The receiving chamber is connected to the acetic acid support frame via a circulation pipe.

[0017] The air outlet is equipped with a control valve and is located at the top of the main housing.

[0018] In a further technical solution, the acetic acid support frame includes a frame body made of stainless steel, and a liquid permeation hole is provided at the bottom; the bottom of the acetic acid support frame is provided with a groove, and the frame body is placed in the groove;

[0019] A clamping plate is installed inside the frame, which is suitable for connecting to the battery cells.

[0020] In a further technical solution, the transmission assembly includes a rotating cylinder, which is fixedly connected to a rotating rod; a rotating wheel is installed at both ends of the rotating cylinder, a connecting belt is installed on the rotating wheel, a fixed column is installed on the frame, a connection port is provided at the top of the fixed column, and the bottom of the connecting belt is connected to the connection port.

[0021] In a further technical solution, the fixed columns are provided in four sets and are distributed in a diamond shape on the four sides of the frame; a balance wheel is installed in the middle of the rotating cylinder, and a second connecting belt is installed on the balance wheel; the bottom of the second connecting belt is forked and connected to two sets of longitudinally distributed connecting ports respectively.

[0022] In a further technical solution, an inlet and an outlet are installed on both sides of the groove of the acetic acid support frame, and an inlet pipe and an outlet pipe are installed at the bottom of the inlet, both of which are connected to the sampling box.

[0023] The sampling box is equipped with a partition, on which a circulation pump is installed. A receiving cavity is opened at the bottom. The receiving cavity includes a left cavity and a right cavity. The left cavity is filled with a 5% acetic acid solution with a pH of 2.9. The right cavity contains the acetic acid solution returned from the acetic acid support frame, and the height of the right cavity is lower than the height of the acetic acid support frame.

[0024] The two ends of the circulating pump are connected to the left cavity and the inlet pipe, respectively;

[0025] A drain pipe is installed at the bottom of the right cavity, and a sampling valve is installed on the drain pipe.

[0026] In a further technical solution, a gas pipe is provided inside the heating tube, and a liquid pipe is provided outside the heating tube; a drive fan is installed at the end of the gas pipe; a liquid outlet is provided at the end of the liquid pipe, and an inclined pipe is installed at the bottom of the liquid outlet.

[0027] The bottom of the main tank is filled with hot water and is suitable for filling with inclined pipes.

[0028] In a further technical solution, the drive fan is installed at one end of the gas pipeline near the connecting pipe, and an air pump element is installed at the other end, the air pump element being adapted to pump gas into the gas pipeline.

[0029] Compared with existing technologies, it has the following advantages:

[0030] In this embodiment, a sampling box continuously supplies a standard test concentration of acetic acid solution to the acetic acid support frame, and a heating box continuously supplies hot water and hot air to maintain the temperature and humidity inside the main chamber. A rotating motor drives a rotating rod to rotate, and a transmission component on the rotating rod drives the frame to achieve an up-and-down transmission effect. A temperature detector detects the internal temperature, and a humidity detector detects the internal humidity. An openable door with an observation port is provided on the front of the main chamber for effective observation of the battery cell corrosion.

[0031] This embodiment uses a rotating rod to drive a rotating wheel, which in turn lifts the object via a connecting belt. A balance wheel drives two sets of connecting ports for auxiliary balancing and lifting, reducing the risk of tipping over. This embodiment uses a heating chamber to simultaneously heat both the liquid and gas, ensuring that the liquid and gas entering the main chamber reach the standard temperature for acetic acid testing. Attached Figure Description

[0032] Figure 1This is a front view of the acetic acid testing device for battery cells according to this utility model;

[0033] Figure 2 This is a front sectional view of the sampling box of this utility model;

[0034] Figure 3 This is a top sectional view of the heating box of this utility model;

[0035] Figure 4 This is a front view schematic diagram of the acetate support frame of this utility model;

[0036] Figure 5 This is a front sectional view of the acetate support frame of this utility model;

[0037] Figure 6 This is a front cross-sectional view of the battery cell acetic acid testing device according to Embodiment 2 of this utility model;

[0038] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0039] Figure 8 This is a top cross-sectional view of the battery cell acetic acid testing equipment of Embodiment 2 of this utility model;

[0040] Figure 9 This is a front cross-sectional view of the acetic acid testing device for battery cells according to Embodiment 3 of this utility model;

[0041] Figure 10 for Figure 9 Enlarged view at point B in the middle;

[0042] Figure 11 This is a schematic diagram of the frame structure;

[0043] Figure 12 This is a top sectional view of the heating box in Embodiment 4 of this utility model;

[0044] Figure 13 This is a side sectional view of the sampling box in Embodiment 4 of this utility model.

[0045] In the picture:

[0046] 1. Main housing; 11. Observation port; 12. Electric butterfly valve; 13. Connecting pipes; 14. Electric valve;

[0047] 2. Acetic acid support frame; 21. Frame body; 22. Liquid permeation hole; 23. Groove opening; 24. Clamping plate; 25. Fixing column; 26. Connection port; 29. ​​Liquid inlet pipe; 210. Liquid outlet pipe;

[0048] 3. Collection box;

[0049] 4. Heating chamber; 41. Heating element; 42. Drive fan; 43. Gas pipeline; 44. Liquid pipeline; 45. Liquid outlet; 46. Inclined pipeline; 47. Air pump component;

[0050] 5. Rotating rod; 51. Rotating cylinder; 52. Rotating wheel one; 53. Connecting belt one; 54. Balance wheel; 55. Connecting belt two;

[0051] 6. Rotate the motor;

[0052] 7. Temperature detector;

[0053] 8. Humidity detector;

[0054] 9. Sampling box; 91. Circulation pump; 92. Baffle; 93. Left cavity; 94. Right cavity; 95. Drainage pipe; 96. Sampling valve;

[0055] 10. Air outlet; 101. Control valve; 100. Battery cell. Detailed Implementation

[0056] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0057] Example 1

[0058] Please see Figure 1-5 This invention provides a technical solution for testing acetic acid in photovoltaic cells, comprising a main housing 1, a conical opening at the bottom of the main housing 1, and an acetic acid support frame 2 installed inside the main housing 1, the acetic acid support frame 2 being suitable for installing the solar cell 100; and an observation port 11 is provided on the main housing 1.

[0059] The collection box 3 has a discharge pipe installed at the bottom of the conical opening, and an electric butterfly valve 12 is installed on the discharge pipe. The bottom of the discharge pipe is connected to the collection box 3.

[0060] Heating box 4 is installed on the side of the main box 1 and connected to it through connecting pipe 13. Heating tube 41 and drive fan 42 are installed inside heating box 4; and electric valve 14 is installed on connecting pipe 13.

[0061] A rotating rod 5 is installed horizontally inside the main housing 1, and its end extends out of the main housing 1 and is equipped with a rotating motor 6. The rotating motor 6 is coaxially connected to the rotating rod 5. A transmission assembly is installed on the rotating rod 5 and is connected to the acetic acid support frame 2.

[0062] Temperature detector 7 and humidity detector 8 are mounted on the main housing 1, and their detection ends extend into the main housing 1.

[0063] Sampling box 9, which contains a receiving cavity and a circulation pump 91. The receiving cavity is connected to the acetic acid support frame 2 through a circulation pipe.

[0064] Air outlet 10, which is equipped with a control valve 101 and is located at the upper end of the main housing 1.

[0065] The acetic acid support frame 2 includes a frame body 21, which is made of stainless steel and has a liquid permeation hole 22 at the bottom. The bottom of the acetic acid support frame 2 has a groove 23, and the frame body 21 is placed in the groove 23. An inlet and an outlet are installed on both sides of the groove 23 of the acetic acid support frame 2. An inlet pipe 29 and an outlet pipe 210 are installed at the bottom of the inlet, and the inlet pipe 29 and the outlet pipe 210 are both connected to the sampling box 9. A clamping plate 24 is provided inside the frame body 21, and the clamping plate 24 is adapted to be connected to the battery cell 100. In this embodiment, a sampling box continuously supplies a standard test concentration of acetic acid solution to the acetic acid support frame, while a heating box continuously supplies hot water and hot air to maintain the temperature and humidity inside the main chamber. If necessary, the top vent is opened for exhaust to reduce acetic acid vapor or hydrogen gas emitted from the cells. A rotating motor drives a rotating rod, and a transmission component on the rotating rod drives the frame to achieve vertical movement. This transmission component can be a simple structure that uses rotation to achieve lifting and lowering, such as a sprocket chain, gear rack, or pulley belt. To prevent acetic acid vapor from being emitted from below, special surface protection treatment is required, such as coating with Teflon material, which can effectively protect against temperatures up to 100 degrees Celsius. A temperature detector monitors the internal temperature, and a humidity detector monitors the internal humidity. An openable door with an observation port is provided on the front of the main chamber for effective observation of cell corrosion.

[0066] Example 2

[0067] like Figure 6-8 As shown, this is another embodiment of the present invention. Based on embodiment 1, the transmission assembly includes a rotating cylinder 51, which is fixedly connected to a rotating rod 5. Rotating wheels 52 are mounted at both ends of the rotating cylinder 51, and connecting belts 53 are mounted on the rotating wheels 52. A fixing post 25 is mounted on the frame 21, and a connecting port 26 is provided at the top of the fixing post 25. The bottom of the connecting belt 53 is connected to the connecting port 26. In this embodiment, the rotating rod rotates to drive the rotating wheels 52 to rotate, and the connecting belt 53 provides a lifting effect.

[0068] Example 3

[0069] like Figure 9-11 As shown, this is another implementation scheme of the present invention, based on embodiment 2, as follows: Figure 11 The fixed columns 25 shown are arranged in four sets, distributed in a rhomboid pattern on the four sides of the frame 21; a balance wheel 54 is installed in the middle of the rotating cylinder 51, and a connecting belt 55 is installed on the balance wheel 54; the bottom of the connecting belt 55 is forked and connected to two sets of longitudinally distributed connecting ports 26 respectively. In this embodiment, by adding balance wheels, the two sets of connecting ports are driven by the balance wheels to assist in balancing and lifting, thereby reducing the risk of overturning.

[0070] Example 4

[0071] like Figure 12 and 13 As shown, another embodiment of this utility model is provided. Based on embodiment 2, a partition 92 is provided inside the sampling box 9, and a circulation pump 91 is installed on the partition 92. A receiving cavity is opened at the bottom. The receiving cavity includes a left cavity 93 and a right cavity 94. The left cavity 93 is filled with a 5% acetic acid solution with a pH of 2.9. The right cavity 94 contains the acetic acid solution returned from the acetic acid support frame 2, and the height of the right cavity 94 is lower than the height of the acetic acid support frame 2. The two ends of the circulation pump 91 are respectively connected to the left cavity 93 and the liquid inlet pipe 29. A drain pipe 95 is installed at the bottom of the right cavity 94, and a sampling valve 96 is installed on the drain pipe 95.

[0072] In such Figure 12 As shown, a gas pipe 43 is provided inside the heating tube 41, and a liquid pipe 44 is provided outside the heating tube 41; a drive fan 42 is installed at the end of the gas pipe 43. Figure 12 A liquid inlet is provided on one side, and a liquid outlet 45 is provided at the end of the liquid pipe 44, combined with... Figure 9 As shown, an inclined pipe 46 is installed at the bottom of the liquid outlet 45; hot water is filled at the bottom of the main housing 1, and is suitable for filling the inclined pipe 46. The drive fan 42 is installed at one end of the gas pipe 43 near the connecting pipe, and an air pump element 47 is installed at the other end. The air pump element 47 is suitable for pumping gas into the gas pipe 43. The air pump element may include an air pump or a gas generator to continuously pump air into the pipe. The heating element is an electric heating tape that can heat both sides, with one side attached to the gas pipe and the other side attached to the liquid pipe. The gas pipe and liquid pipe can be made of materials that easily conduct heat or adopt a curved structure to achieve continuous heating, and are not limited to... Figure 12 The installation structure is as follows. In this embodiment, a set of heating chambers is used to heat the liquid and gas, so that the liquid and gas entering the main chamber reach the standard temperature for acetic acid detection.

[0073] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. An apparatus for testing acetic acid in photovoltaic cells, characterized in that, include: The main box (1) has a conical opening at the bottom and an acetic acid support frame (2) installed inside. The acetic acid support frame (2) is equipped with battery cells (100). An observation port (11) is provided on the main box (1). The collection box (3) has a discharge pipe installed at the bottom of the conical opening. An electric butterfly valve (12) is installed on the discharge pipe, and the bottom of the discharge pipe is connected to the collection box (3). Heating box (4) is installed on the side of the main box (1) and connected by connecting pipe (13). Heating tube (41) and drive fan (42) are installed inside the heating box (4); and electric valve (14) is installed on the connecting pipe (13). A rotating rod (5) is installed horizontally inside the main housing (1), and its end extends out of the main housing (1) and is equipped with a rotating motor (6). The rotating motor (6) is coaxially connected to the rotating rod (5). A transmission assembly is installed on the rotating rod (5), and the transmission assembly is connected to the acetic acid support frame (2). Temperature detector (7) and humidity detector (8) are installed on the main enclosure (1) and are suitable for detecting the temperature and humidity inside the main enclosure (1); The sampling box (9) is equipped with a accommodating cavity and a circulating pump (91). The accommodating cavity is connected to the acetic acid support frame (2) through a circulating pipe. Air outlet (10), which is equipped with a control valve (101) and is located at the upper end of the main body (1).

2. The apparatus for acetic acid testing of photovoltaic cells according to claim 1, characterized in that, The acetic acid support frame (2) includes a frame body (21), which is made of stainless steel and has a liquid permeable hole (22) at the bottom; the bottom of the acetic acid support frame (2) is provided with a groove (23), and the frame body (21) is placed in the groove (23); A clamping plate (24) is provided inside the frame (21), and the clamping plate (24) is adapted to be connected to the battery cell (100).

3. The apparatus for testing acetic acid in photovoltaic cells according to claim 2, characterized in that, The transmission assembly includes a rotating cylinder (51), which is fixedly connected to a rotating rod (5); a rotating wheel (52) is installed at both ends of the rotating cylinder (51), a connecting belt (53) is installed on the rotating wheel (52), a fixed column (25) is installed on the frame (21), a connecting port (26) is provided at the top of the fixed column (25), and the bottom of the connecting belt (53) is connected to the connecting port (26).

4. The apparatus for testing acetic acid in photovoltaic cells according to claim 3, characterized in that, The fixed columns (25) are provided in four sets and are distributed in a diamond shape on the four sides of the frame (21); a balance wheel (54) is installed in the middle of the rotating cylinder (51), and a connecting belt (55) is installed on the balance wheel (54); the bottom of the connecting belt (55) is forked and connected to two sets of longitudinally distributed connecting ports (26).

5. The apparatus for acetic acid testing of photovoltaic cells according to claim 1, characterized in that, An inlet and an outlet are installed on both sides of the groove (23) of the acetic acid support frame (2), and an inlet pipe (29) and an outlet pipe (210) are installed at the bottom of the inlet. The inlet pipe (29) and the outlet pipe (210) are both connected to the sampling box (9). The sampling box (9) is equipped with a partition (92), and a circulation pump (91) is installed on the partition (92). A receiving cavity is opened at the bottom. The receiving cavity includes a left cavity (93) and a right cavity (94). The left cavity (93) is filled with 5% acetic acid solution. The right cavity (94) contains the acetic acid solution returned from the acetic acid support frame (2), and the height of the right cavity (94) is lower than the height of the acetic acid support frame (2). The two ends of the circulating pump (91) are connected to the left cavity (93) and the liquid inlet pipe (29), respectively. A drain pipe (95) is installed at the bottom of the right cavity (94), and a sampling valve (96) is installed on the drain pipe (95).

6. The apparatus for testing acetic acid in photovoltaic cells according to claim 1, characterized in that, A gas pipe (43) is provided inside the heating tube (41), and a liquid pipe (44) is provided outside the heating tube (41); a liquid outlet (45) is provided at the end of the liquid pipe (44), and an inclined pipe (46) is installed at the bottom of the liquid outlet (45). The bottom of the main tank (1) is filled with hot water and is suitable for filling with inclined pipes (46).

7. The apparatus for testing acetic acid in photovoltaic cells according to claim 1, characterized in that, The drive fan (42) is installed at one end of the gas pipe (43) near the connecting pipe, and the other end is equipped with an air pump element (47), which is adapted to pump gas into the gas pipe (43).

Images