Corrosion resistance testing tool

Abstract

The utility model discloses an anti-corrosion test tool, which comprises a test box, a base, a base plate, a base plate, a base plate, a base plate, a base plate, a base plate, a base plate, a base plate, a base plate, a base plate and a base plate, wherein the base plate is used for containing volatilizable corrosive liquid; the support comprises a supporting assembly fixedly installed in the box body. The PWM fan comprises a fan body and a PWM controller; the fan is fixedly mounted on the inner wall of the box body; and the PWM controller is arranged outside the test box and is used for controlling the rotating speed of the fan. Compared with the prior art, the fan is arranged in the test box, so that the corrosion process can be accelerated, the corrosion uniformity can be improved, the rotating speed of the fan can be timely controlled to reach a preset fixed value by controlling the input voltage, the wind speed condition in the test process is ensured, and the test error caused by wind speed fluctuation is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to photovoltaic cell performance test technical field, specifically about a kind of anticorrosion test tool. BACKGROUND

[0002] Currently, when carrying out acetic acid corrosion test of photovoltaic cell piece in photovoltaic laboratory, the usual method is to place the test box containing cell piece and acetic acid in high-temperature oven to simulate environmental conditions, so that acetic acid evaporates and corrodes cell piece at high temperature. However, in actual operation, the corrosion liquid is affected by different conditions such as heating source position and heating temperature, and often shows uneven volatilization and corrosion, slow corrosion rate leading to prolonged test time, and difficulty in accurate recording.

[0003] In addition, after placing the cell piece acetic acid test box into the high-temperature oven, the resistance value of the fan motor coil winding will change accordingly due to the influence of temperature and acetic acid corrosion. Therefore, if a fan or other equipment is installed, it will cause the speed to change under the fixed voltage input, thereby affecting the test results and greatly affecting the test accuracy.

[0004] Therefore, in view of the above technical problems, it is necessary to provide a more stable photovoltaic cell corrosion resistance test device.

[0005] The information disclosed in this background section is intended only to increase an understanding of the general background of the present utility model and should not be construed as a recognition of the prior art. UTILITY MODEL CONTENT

[0006] The utility model aims at providing an anticorrosion test tool, which can dynamically adjust the PWM fan speed under complex test environment, effectively control the wind speed variable and reduce the test error.

[0007] In order to achieve the above-mentioned purpose, the technical scheme provided by a specific embodiment of the utility model is as follows:

[0008] The utility model provides an anticorrosion test tool, which comprises:

[0009] The test box comprises a box body for containing volatile corrosion liquid and a box cover matched with the box body.

[0010] The support comprises a support assembly fixedly installed in the box body.

[0011] The PWM fan comprises a fan and a PWM controller. The fan is fixedly installed on the inner wall of the box body. The PWM controller is arranged outside the test box and used to control the speed of the fan.

[0012] In one or more embodiments of the utility model, the support assembly includes oppositely arranged first frame body, second frame body and support piece fixedly installed at the bottom of first frame body and second frame body.

[0013] In one or more embodiments of the utility model, the support further includes a limiting assembly fixedly connected with the first frame body and the second frame body, and the limiting assembly includes oppositely arranged first limiting piece and second limiting piece.

[0014] A plurality of first limiting grooves are arranged at the side of the first limiting piece facing the second limiting piece, and a plurality of second limiting grooves are arranged at the side of the second limiting piece facing the first limiting piece, and the first limiting grooves and the second limiting grooves correspond one by one.

[0015] In one or more embodiments of the utility model, the upper surface of the support piece is higher than the liquid level of the etching liquid.

[0016] In one or more embodiments of the utility model, a plurality of air flow channels are formed between the interval arranged battery pieces on the support, and the fan outlet direction faces the air flow channels.

[0017] In one or more embodiments of the utility model, a plurality of signal transmission lines are connected between the PWM controller and the fan, and the signal transmission lines include fan speed measurement signal transmission line and PWM speed regulation signal transmission line.

[0018] The PWM controller and the fan are also connected with power line and ground line.

[0019] In one or more embodiments of the utility model, the test box inner wall where the fan is arranged is provided with a via hole, and the power line, ground line and a plurality of signal transmission lines are arranged in the via hole.

[0020] In one or more embodiments of the utility model, the PWM fan further includes a fixing piece for connecting with the inner wall of the box, and a plurality of first through holes parallel to the air outlet direction are arranged on the fixing piece.

[0021] A plurality of second through holes are further arranged on the test box inner wall where the fan is arranged, and the second through holes and the first through holes form a connecting channel one by one.

[0022] The fan is screwed with the inner wall of the box based on the connecting channel.

[0023] In one or more embodiments of the utility model, one or more spacers are arranged between the fixing piece of the PWM fan and the inner wall of the box.

[0024] In one or more embodiments of the utility model, the box cover is equipped with a sealing rubber ring for sealing connection between the box body and the box cover.

[0025] Compared with the prior art, the utility model discloses a fan is arranged in the test box, can accelerate the corrosion process, improves the uniformity of corrosion. Meanwhile, based on the PWM controller can real -time observation fan speed in the test box, and can be in time through the control input voltage's mode control fan speed reaches the fixed value of prearrangement, ensures the wind speed condition of test process, greatly reduces the test error due to the wind speed fluctuation. Meanwhile, the user can easily set and switch different experimental conditions, improve the work efficiency. Further, the utility model discloses a low -cost singlechip as the controller, is convenient for large -scale popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description is only some embodiments in the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0027] Figure 1 It is the perspective view of the anti-corrosion test tool in an exemplary embodiment of the utility model;

[0028] Figure 2 It is the perspective view of the anti-corrosion test tool in an exemplary embodiment of the utility model;

[0029] Figure 3 It is the perspective view of the anti-corrosion test tool in an exemplary embodiment of the utility model;

[0030] Figure 4 It is the perspective view of the anti-corrosion test tool in an exemplary embodiment of the utility model;

[0031] MAIN REFERENCE NUMERALS EXPLANATION

[0032] 1-test box, 11-box body, 111-via, 112-second through hole, 12-box cover, 2-bracket, 21-supporting assembly, 211-supporting piece, 212-first frame body, 213-second frame body, 22-limiting assembly, 221-first limiting piece, 222-second limiting piece, 2211-first limiting slot, 2221-second limiting slot, 3-PWM fan, 31-fan, 311-fixing piece, 3111-first through hole, 32-PWM controller, 33-connection line. DETAILED DESCRIPTION

[0033] In order to make the technical scheme in the present application better understood by those skilled in the art, the technical scheme in the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0034] As shown in Figures 1-4 The anti-corrosion test tool comprises a test box 1, which comprises a box body 11 for containing volatile corrosive liquid and a box cover 12 matched with the box body 11.

[0035] A support 2, which comprises a support assembly 21 fixedly installed in the box body 11.

[0036] A PWM (pulse width modulation, PWM for short) fan 3, which comprises a fan 31 and a PWM controller 32; the fan 31 is fixedly installed on the inner wall of the box body 11; the PWM controller 32 is arranged outside the test box 1 and is used for controlling the rotating speed of the fan 31.

[0037] It should be noted that the box body 11 contains volatile corrosive liquid. Under certain temperature conditions, the corrosive liquid can be vaporized to form corrosive liquid vapor, which can corrode the battery piece to be tested erected in the test box 1. It can be understood that in the embodiments of the present application, the inner wall of the box body, the fan 31 and the support 2 are all exposed to the corrosive liquid vapor during the use of the anti-corrosion test tool, so the material of the test box 1, the fan 31 and the support 2 should have good chemical stability and not react with the corrosive liquid added into the box body 11 and the derivative of the corrosive liquid; at the same time, since the test tool is usually placed in a high-temperature environment during use, the above-mentioned test box 1, fan 31 and support 2 should also have good thermal stability, so that there is no other variable during the experiment at the required temperature, and the data obtained in the experiment is accurate.

[0038] On this basis, the material of the test box 1 and the support 2 and the type of corrosive liquid are not limited in the embodiments of the present application. Preferably, inert materials such as polyethylene, polyvinyl chloride, polytetrafluoroethylene, etc. can be used to process the test box 1 and / or the support 2 required by the present application. The corrosive liquid preferably uses acetic acid.

[0039] It can be understood that when the evaporation rate of the etching liquid is equal to the condensation rate, that is, the etching liquid is at the saturation vapor pressure at the required temperature of the experiment, the concentration of the etching liquid vapor in the test box 1 reaches the maximum, and the etching rate is the fastest. In order to increase the concentration of the etching liquid in the test box 1, reach the state that the etching liquid no longer evaporates under the macro, and improve the utilization rate of the etching liquid, and at the same time avoid the pollution of the environment caused by the leakage of the etching liquid / etching vapor, the environment in the test box 1 should be approximately sealed.

[0040] In an exemplary embodiment, the box cover 12 or the box body 11 is provided with a sealing rubber ring for sealing connection of the box body 11 and the box cover 12. When the box cover 12 is combined with the box body 11, the sealing rubber ring blocks the gap between the box body 11 and the box cover 12, achieving the sealing effect.

[0041] On the basis of the above embodiment, in order to further improve the sealing effect of the test box 1, in another embodiment, the box body 11 can be provided with a clamping part, and the box cover 12 is provided with a clamping groove matched with the clamping part. When the box cover 12 is combined with the box body 11, based on the clamping part and the clamping groove, the closure of the box body 11 and the box cover 12 is realized.

[0042] As shown in Figure 2 Fig. 2 is a schematic diagram of the three-dimensional structure of the support 2 in an exemplary embodiment of the present application. Among them, the support assembly 21 includes a support part 211, a first frame 212 and a second frame 213; the limiting assembly 22 includes a first limiting part 221 and a second limiting part 222.

[0043] The first limiting part 221 is provided with a plurality of first limiting grooves 2211 on the side facing the second limiting part 222, and the second limiting part 222 is provided with a plurality of second limiting grooves 2221 on the side facing the first limiting part 221. The first limiting groove 2211, the second limiting groove 2221 and the upper surface of the support part 211 located in the same vertical plane form a battery piece receiving space together, which is used for limiting the battery piece to be tested.

[0044] Further, the support 211 is used to support the to-be-tested battery piece in the vertical direction to avoid the to-be-tested battery piece directly contacting the corrosion solution. In order to achieve the technical effect, it can be understood that the upper surface of the support 211 should be higher than the liquid level of the corrosion solution. The first frame body 212 and the second frame body 213 are used to connect the limiting assembly 22 and the support 211 to form a stable bracket 2 structure; meanwhile, the first limiting piece 221 / the second limiting piece 222 is kept a certain distance from the bottom of the box body 11 to improve the limiting effect of the limiting assembly 22 and avoid displacement of the to-be-tested battery piece in the experiment; the first frame body 212 and the second frame body 213 are also used to keep the first limiting piece 221 and the second limiting piece 222 arranged oppositely at a preset distance in the horizontal direction. The above-mentioned preset distance should be adjusted based on the size and clamping mode of the to-be-tested battery piece, and the embodiments of the utility model do not limit this.

[0045] It should be noted that, in order to maintain the stability and airtightness of the box body 11, the connection mode of the support 211 and the bottom of the box body 11 is preferably adhesion. The connection mode between other components of the bracket 2 is not limited by the utility model, which can include but is not limited to adhesion, screwing, interference fit and the like.

[0046] In order to further improve the adaptability of the utility model, the anti-corrosion test tool can be applied to to-be-tested battery pieces of various sizes. In another exemplary embodiment of the utility model, the first frame body 212 and the second frame body 213 can be telescopic in the direction perpendicular to the limiting assembly 22.

[0047] Specifically, in the embodiment, the first frame body 212 and the second frame body 213 include a fixed part and a telescopic part. The outer diameter of the telescopic part is smaller than the inner diameter of the fixed part, and the telescopic part can move linearly along the preset channel in the fixed part. The side plane of the fixed part is provided with a positioning hole, and the same side plane of the telescopic part is provided with a positioning piece matched with the positioning hole. The positioning piece can protrude from the plane of the telescopic part under the action of an elastic piece, or can be retracted to be flush with the plane of the telescopic part under the action of an external force. In the unlocked state, press the positioning piece, move the telescopic part to the required position and stop pressing the positioning piece. The positioning piece is extended under the action of the elastic piece and cooperates with the corresponding positioning hole to realize the locking of the first frame body 212 and the second frame body 213.

[0048] It should be noted that, in this embodiment, since the telescopic part needs to be displaced, the connection between the support 211 and the bottom of the box body 11 needs to be adhesion through the fixed part and / or the support 211 connected with the fixed part to the bottom of the box body 11.

[0049] As Figure 3As shown, it is the three-dimensional structure schematic view of the PWM fan 3 in an exemplary embodiment of the utility model, the PWM fan 3 includes setting in the test box 1 outside PWM controller 32 and setting in the test box 1 inner wall fan 31.

[0050] Need to explain, the test box 1 inner wall of setting the fan 31 is provided with via hole 111, for the connecting line 33 between the PWM controller 32 and the fan 31 is arranged. The connecting line 33 includes fan speed signal transmission line, PWM speed signal transmission line, power line and ground wire.

[0051] In the application process of the utility model, based on fan speed signal transmission line, the actual speed of fan is returned to PWM controller 32, and the actual speed value of current fan is displayed in user terminal. In the corrosion environment, since the resistance of fan resistance is influenced by the concentration of corrosion liquid vapor, it will be reduced or increased accordingly. At this time, the user can change the duty ratio of PWM speed signal through PWM controller 32, and then realize the control of input voltage, improve / reduce the speed of fan to the desired speed value. The ground wire is used to connect the ground of fan and power supply together to ensure the stable flow of current and avoid damage to other parts of the device caused by excessive or unstable current.

[0052] Based on the same fact and reason as the above setting sealing rubber strip, in order to ensure the air tightness of the box body 11, after the connecting line 33 between the PWM controller 32 and the fan 31 passes through the via hole 111, the resin material is coated on the via hole 111. The resin material can avoid damaging the air tightness of the box body 11 due to the existence of the via hole 111, and can also fix the connecting line 33, avoid the displacement or disconnection of the fan in the box body 11 caused by the misoperation outside the box body 11.

[0053] It also needs to be explained that the PWM fan 3 also includes a fixing part 311 for connecting with the inner wall of the test box 1. The utility model does not limit the connection mode of the fixing part 311 and the inner wall of the box body 11, which can include but is not limited to: bonding, clamping, screwing and the like.

[0054] Different from the connection mode selection of the support assembly 21 and the bottom of the box body 11, since the PWM fan 3 is fixed with the inner wall of the box body 11, it needs to overcome its own gravity; at the same time, the air outlet direction of the fan will affect the corrosion uniformity of the battery piece to be tested to a certain extent. Therefore, in order to maintain the stability of the anti-corrosion test tool provided by the utility model for long-term use, and the accuracy of the test, the fixing part 311 and the inner wall of the box body 11 are preferably screwed.

[0055] In a specific embodiment, the fixing member 311 is provided with a plurality of first through holes 3111 parallel to the air outlet direction. The inner wall of the test box 1 is also provided with a plurality of second through holes 112 corresponding to the first through holes 3111 to form a connecting channel; the PWM fan 3 is screwed to the inner wall of the test box 1 based on the connecting channel.

[0056] Similarly, in order to avoid corrosion vapor leakage caused by the opening, a resin material can be coated on the screwing position to maintain the airtightness of the box 11.

[0057] Further, in order to ensure normal air outlet of the fan, one or more spacers can be arranged between the fixing member 311 and the inner wall of the test box 1 to maintain a certain spacing between the back of the fan 31 and the inner wall of the test box 1.

[0058] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0059] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An anti-corrosion test fixture, characterized by, The utility model relates to a test box for testing battery piece, which comprises a box body for containing volatile corrosive liquid and a box cover matched with the box body. The support assembly is fixedly installed in the box body. The PWM fan comprises a fan and a PWM controller. The support assembly comprises a first frame body, a second frame body and a support piece fixedly installed at the bottom of the first frame body and the second frame body.

2. The corrosion testing fixture of claim 1, wherein, The support assembly further comprises a limiting assembly fixedly connected with the first frame body and the second frame body.

3. The corrosion testing fixture of claim 2, wherein, The first limiting piece is provided with a plurality of first limiting grooves on the side facing the second limiting piece. The upper surface of the support piece is higher than the liquid level of the corrosive liquid.

4. The corrosion testing fixture of claim 3, wherein, A plurality of air flow channels are formed between the battery pieces to be tested arranged at intervals on the support assembly.

5. The corrosion testing fixture of claim 3, wherein, The PWM controller is connected with the fan through a plurality of signal transmission lines.

6. The corrosion testing fixture of claim 1, wherein, The PWM controller is further connected with the fan through a power line and a grounding line. The power line, the grounding line and the plurality of signal transmission lines are arranged in the through hole.

7. The corrosion testing fixture of claim 6, wherein, The PWM fan further comprises a fixing piece for connecting with the inner wall of the box body.

8. The corrosion testing fixture of claim 1, wherein, The fixing piece is provided with a plurality of first through holes parallel to the air outlet direction. The inner wall of the test box is further provided with a plurality of second through holes corresponding to the first through holes to form a connecting channel. The fan is screwed with the inner wall of the box body based on the connecting channel.

9. The corrosion testing fixture of claim 8, wherein, One or more spacers are arranged between the fixing piece of the PWM fan and the inner wall of the box body.

10. The corrosion testing fixture of claim 1, wherein, The box cover is provided with a sealing rubber ring for sealing connection between the box body and the box cover.

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