CN104502394A - Device and method for testing thermal performance of junction box of photovoltaic module - Google Patents
Device and method for testing thermal performance of junction box of photovoltaic module Download PDFInfo
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- CN104502394A CN104502394A CN201410800542.7A CN201410800542A CN104502394A CN 104502394 A CN104502394 A CN 104502394A CN 201410800542 A CN201410800542 A CN 201410800542A CN 104502394 A CN104502394 A CN 104502394A
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- terminal box
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- pressure ball
- pressure
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Abstract
The invention provides a device and a method for testing the thermal performance of a junction box of a photovoltaic module. The device comprises a pressure ball, a load rod, a weight supporting rod, a weight and a sample bracket, wherein a test sample junction box is horizontally placed on the sample bracket, the pressure ball is pressed on the upper surface of the test sample junction box, the pressure ball is arranged at the bottom end of the load rod, the weight supporting rod is arranged at the side surface of the load rod, and the weight is arranged on the weight supporting rod. According to the device, the pressure ball is configured on a pressure point, a fixed pressure is applied to the surface of a box body of the junction box; simulation work is performed by combining with an experiment condition, and the pressure resistance performance of an insulation material of the box body is tested. The device provides a basis for judging the appearance of the box body after the pressure is born through confirming that whether an indentation exists on the surface of the box body or not and according to the diameter of the indentation.
Description
Technical field
The present invention relates to a kind of proving installation and method of photovoltaic component terminal box thermal behavior, for assessment of the mechanical property of photovoltaic module terminal box adstante febre shell at work.
Background technology
Terminal box plays very important effect in photovoltaic module.It utilizes the performance of himself at photovoltaic module in shading, when electric current adaptation waits other unfavorable factor to occur, can also ensure its work, suitably reduce loss.Its principle of work is in photovoltaic module shading, and when electric current adaptation, internal by-pass diode operation, makes the power stage that photovoltaic module acquires a certain degree, and can not cause local overheating.But when its bypass diode work, the heating of terminal box also can be caused.If due to junction box unreasonable structure, or when bypass diode temperature is too high, when junction box is closed, heating causes material expansion, then terminal box casing deformation or shell is caused to throw off terminal box, the situation that this type of situation can cause terminal box to be leaked electricity.
Summary of the invention
The object of the invention is to overcome above-mentioned situation, providing a kind of proving installation and method of photovoltaic component terminal box thermal behavior, for assessing photovoltaic component terminal box thermal behavior.
According to technical scheme provided by the invention, the proving installation of described photovoltaic component terminal box thermal behavior comprises: pressure ball, load beam, ballast support bar, weight and sample holder, horizontal positioned test sample terminal box on described sample holder, pressure ball is pressed in test sample terminal box upper surface, pressure ball is arranged on load beam bottom, ballast support bar is installed in load beam side, and weight is arranged on ballast support bar.
Concrete, described ballast support bar and weight symmetry be distributed in load beam both sides.Described pressure ball, load beam, ballast support bar and sample holder all adopt stainless steel to make.
Described pressure ball diameter is 2.1mm ~ 2.5mm, and weight is applied to the pressure of test sample terminal box surface 8N ~ 10N by ballast support bar, load beam and pressure ball.
The method of testing of photovoltaic component terminal box thermal behavior has three kinds of schemes, and the first is:
1) test sample terminal box is placed on sample holder, ensures that the center of test sample terminal box is on sample holder center;
2) pressure ball diameter being greater than 2mm is placed in test sample terminal box, applies the fixation pressure of 8N ~ 10N, ensures that the center of pressure ball is on test sample terminal box center;
3) pass to the electric current of the most high workload point of photovoltaic module, the working condition of simulated light photovoltaic assembly to test sample terminal box;
4), after leading to the electric current of set time, pressure ball and test sample terminal box is taken off;
5) whether position, observation test sample terminal box surface pressure force exists distortion, if the words of distortion measure deformed region horizontal maximum diameter d;
6) if d is not more than 2mm, then think that this terminal box can bear the thermal behavior under the work of photovoltaic module normal temperature.
The second method of photovoltaic component terminal box thermal performance test is:
1) test sample terminal box is placed on sample holder, ensures that the center of test sample terminal box is on sample holder center;
2) pressure ball diameter being greater than 2mm is placed in test sample terminal box, applies the fixation pressure of 8N ~ 10N, ensures that the center of pressure ball is on test sample terminal box center;
3) whole proving installation is placed in baking oven;
4) oven temperature 70 DEG C ~ 85 DEG C is set, toasts one period of set time, take out test sample terminal box;
5) whether position, observation test sample terminal box surface pressure force exists distortion, if the words of distortion measure deformed region horizontal maximum diameter d;
6) if d is not more than 2mm, then think that this terminal box can bear the thermal behavior under photovoltaic module hot operation.
The third method of photovoltaic component terminal box thermal performance test is:
1) test sample terminal box is placed on sample holder, ensures that the center of test sample terminal box is on sample holder center;
2) pressure ball diameter being greater than 2mm is placed in test sample terminal box, applies the fixation pressure of 8N ~ 10N, ensures that the center of pressure ball is on test sample terminal box center;
3) whole proving installation is placed in baking oven;
4) oven temperature 70 DEG C ~ 85 DEG C is set, and passes to the electric current of the most high workload point of photovoltaic module, the working condition of simulated light photovoltaic assembly to test sample terminal box;
5) maintain one period of set time under these conditions, take out test sample terminal box;
6) whether position, observation test sample terminal box surface pressure force exists distortion, if the words of distortion measure deformed region horizontal maximum diameter d;
7) if d is not more than 2mm, then think that this terminal box can bear the thermal behavior under photovoltaic module hot operation.
Advantage of the present invention is: the proving installation devising a kind of special photovoltaic component terminal box thermal behavior, is configured with a pressure ball at pressure point locations, applies fixing pressure on terminal box body surface; Binding experiment condition carries out analog operation, the compression resistance performance of test box body insulating material.
Accompanying drawing explanation
Fig. 1 is proving installation structural drawing of the present invention.
Fig. 2 is test philosophy figure of the present invention.
Embodiment
The present invention illustrates its feature and effect thereof by following several instantiation.
As shown in Figure 1, proving installation of the present invention comprises: pressure ball 1, load beam 3, ballast support bar 4, weight 5 and sample holder 6, horizontal positioned test sample terminal box 2 on described sample holder 6, pressure ball 1 is pressed in test sample terminal box 2 upper surface, pressure ball 1 is arranged on load beam 3 bottom, ballast support bar 4 is installed in load beam 3 side, and weight 5 is arranged on ballast support bar 4.Described ballast support bar 4 and weight 5 symmetry be distributed in load beam 3 both sides.The all parts stainless steels of device make.
Pressure ball 1 diameter of the present invention is greater than 2mm, is 2.1mm ~ 2.5mm in embodiment, and weight 5 is applied to the pressure of the surperficial 8N ~ 10N of test sample terminal box 2 by ballast support bar 4, load beam 3 and pressure ball 1.
The present invention provides a kind of basis for estimation to bearing the box body outward appearance after pressure, and the diameter that whether be there is impression and impression by confirmation box surface is made a decision.
Concrete method of testing is as follows.
Scheme 1:
1. test sample terminal box 2 is placed on sample holder 6, ensures that the center of test sample terminal box 2 is on sample holder 6 center;
2. pressure ball 1 is placed in test sample terminal box 2, applies the fixation pressure of 8N ~ 10N, ensure that the center of pressure ball 1 is on test sample terminal box 2 center;
3. pass to the electric current of the most high workload point of photovoltaic module, the working condition of simulated light photovoltaic assembly to test sample terminal box 2;
4., after leading to the electric current of set time (as 12 ~ 24 hours), take off pressure ball 1 and test sample terminal box 2;
5. whether position, observation test sample terminal box 2 surface pressure force exists distortion, if the words of distortion measure deformed region horizontal maximum diameter d;
If 6. d is not more than 2mm, then think that this terminal box can bear the thermal behavior under the work of photovoltaic module normal temperature.
Scheme 2:
1. test sample terminal box 2 is placed on sample holder 6, ensures that the center of test sample terminal box 2 is on sample holder 6 center;
2. pressure ball 1 is placed in test sample terminal box 2, applies the fixation pressure of 8N ~ 10N, ensure that the center of pressure ball 1 is on test sample terminal box 2 center;
3. whole proving installation is placed in baking oven;
4. oven temperature 70 DEG C ~ 85 DEG C is set, toasts one section of set time (as 12 ~ 24 hours), take out test sample terminal box 2;
5. whether position, observation test sample terminal box 2 surface pressure force exists distortion, if the words of distortion measure deformed region horizontal maximum diameter d;
If 6. d is not more than 2mm, then think that this terminal box can bear the thermal behavior under photovoltaic module hot operation.
Scheme 3:
1. test sample terminal box 2 is placed on sample holder 6, ensures that the center of test sample terminal box 2 is on sample holder 6 center;
2. pressure ball 1 is placed in test sample terminal box 2, applies the fixation pressure of 8N ~ 10N, ensure that the center of pressure ball 1 is on test sample terminal box 2 center;
3. whole proving installation is placed in baking oven;
4. oven temperature 70 DEG C ~ 85 DEG C is set, and passes to the electric current of the most high workload point of photovoltaic module, the working condition of simulated light photovoltaic assembly to test sample terminal box 2;
5. maintain one section of set time (as 12 ~ 24 hours) under these conditions, take out test sample terminal box 2;
6. whether position, observation test sample terminal box 2 surface pressure force exists distortion, if the words of distortion measure deformed region horizontal maximum diameter d;
If 7. d is not more than 2mm, then think that this terminal box can bear the thermal behavior under photovoltaic module hot operation.
As shown in Figure 2, pressure ball 1 produces impression on test sample terminal box 2 surface, and overlooking is a border circular areas, measures the diameter of this border circular areas, i.e. described deformed region horizontal maximum diameter d.
Claims (7)
1. the proving installation of photovoltaic component terminal box thermal behavior, it is characterized in that, comprise: pressure ball (1), load beam (3), ballast support bar (4), weight (5) and sample holder (6), upper horizontal positioned test sample terminal box (2) of described sample holder (6), pressure ball (1) is pressed in test sample terminal box (2) upper surface, pressure ball (1) is arranged on load beam (3) bottom, ballast support bar (4) is installed in load beam (3) side, and weight (5) is arranged on ballast support bar (4).
2. the proving installation of photovoltaic component terminal box thermal behavior as claimed in claim 1, is characterized in that, described ballast support bar (4) and weight (5) symmetry be distributed in load beam (3) both sides.
3. the proving installation of photovoltaic component terminal box thermal behavior as claimed in claim 1, it is characterized in that, described pressure ball (1), load beam (3), ballast support bar (4) and sample holder (6) all adopt stainless steel to make.
4. the proving installation of photovoltaic component terminal box thermal behavior as claimed in claim 1, it is characterized in that, described pressure ball (1) diameter is 2.1mm ~ 2.5mm, and weight (5) is applied to the pressure of test sample terminal box (2) surperficial 8N ~ 10N by ballast support bar (4), load beam (3) and pressure ball (1).
5. the method for testing of photovoltaic component terminal box thermal behavior, is characterized in that, comprises the following steps:
1) will test sample terminal box (2) is placed on sample holder (6), ensures that the center of test sample terminal box (2) is on sample holder (6) center;
2) pressure ball (1) diameter being greater than 2mm is placed in test sample terminal box (2), applies the fixation pressure of 8N ~ 10N, ensures that the center of pressure ball (1) is on test sample terminal box (2) center;
3) pass to the electric current of the most high workload point of photovoltaic module, the working condition of simulated light photovoltaic assembly to test sample terminal box (2);
4), after leading to the electric current of set time, pressure ball (1) and test sample terminal box (2) is taken off;
5) whether position, observation test sample terminal box (2) surface pressure force exists distortion, if the words of distortion measure deformed region horizontal maximum diameter d;
6) if d is not more than 2mm, then think that this terminal box can bear the thermal behavior under the work of photovoltaic module normal temperature.
6. the method for testing of photovoltaic component terminal box thermal behavior, is characterized in that, comprises the following steps:
1) will test sample terminal box (2) is placed on sample holder (6), ensures that the center of test sample terminal box (2) is on sample holder (6) center;
2) pressure ball (1) diameter being greater than 2mm is placed in test sample terminal box (2), applies the fixation pressure of 8N ~ 10N, ensures that the center of pressure ball (1) is on test sample terminal box (2) center;
3) whole proving installation is placed in baking oven;
4) oven temperature 70 DEG C ~ 85 DEG C is set, toasts one period of set time, take out test sample terminal box (2);
5) whether position, observation test sample terminal box (2) surface pressure force exists distortion, if the words of distortion measure deformed region horizontal maximum diameter d;
6) if d is not more than 2mm, then think that this terminal box can bear the thermal behavior under photovoltaic module hot operation.
7. the method for testing of photovoltaic component terminal box thermal behavior, is characterized in that, comprises the following steps:
1) will test sample terminal box (2) is placed on sample holder (6), ensures that the center of test sample terminal box (2) is on sample holder (6) center;
2) pressure ball (1) diameter being greater than 2mm is placed in test sample terminal box (2), applies the fixation pressure of 8N ~ 10N, ensures that the center of pressure ball (1) is on test sample terminal box (2) center;
3) whole proving installation is placed in baking oven;
4) oven temperature 70 DEG C ~ 85 DEG C is set, and passes to the electric current of the most high workload point of photovoltaic module, the working condition of simulated light photovoltaic assembly to test sample terminal box (2);
5) maintain one period of set time under these conditions, take out test sample terminal box (2);
6) whether position, observation test sample terminal box (2) surface pressure force exists distortion, if the words of distortion measure deformed region horizontal maximum diameter d;
7) if d is not more than 2mm, then think that this terminal box can bear the thermal behavior under photovoltaic module hot operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410800542.7A CN104502394A (en) | 2014-12-20 | 2014-12-20 | Device and method for testing thermal performance of junction box of photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410800542.7A CN104502394A (en) | 2014-12-20 | 2014-12-20 | Device and method for testing thermal performance of junction box of photovoltaic module |
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|---|---|
| CN104502394A true CN104502394A (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410800542.7A Pending CN104502394A (en) | 2014-12-20 | 2014-12-20 | Device and method for testing thermal performance of junction box of photovoltaic module |
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| CN (1) | CN104502394A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018764A (en) * | 2016-08-01 | 2016-10-12 | 中电投西安太阳能电力有限公司 | Method for detecting and determining returned materials in photovoltaic module junction box |
| CN112649465A (en) * | 2020-11-20 | 2021-04-13 | 吉林大学 | Method for testing low-temperature thermal shrinkage coefficient of material by utilizing residual indentation morphology |
-
2014
- 2014-12-20 CN CN201410800542.7A patent/CN104502394A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018764A (en) * | 2016-08-01 | 2016-10-12 | 中电投西安太阳能电力有限公司 | Method for detecting and determining returned materials in photovoltaic module junction box |
| CN106018764B (en) * | 2016-08-01 | 2017-12-12 | 中电投西安太阳能电力有限公司 | The detection of feed back and decision method in a kind of photovoltaic component terminal box |
| CN112649465A (en) * | 2020-11-20 | 2021-04-13 | 吉林大学 | Method for testing low-temperature thermal shrinkage coefficient of material by utilizing residual indentation morphology |
| CN112649465B (en) * | 2020-11-20 | 2021-09-21 | 吉林大学 | Method for testing low-temperature thermal shrinkage coefficient of material by utilizing residual indentation morphology |
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Application publication date: 20150408 |