Patent Application
20210175848
The present disclosure relates to the field of solar cell performance tests, in particular to a wet leakage current test system for a photovoltaic component.
According to international standards, there is a strict requirement on the wet leakage current test of a photovoltaic component, with a purpose of verifying an insulating property of the component under a field humid environment, and avoiding corrosion, electric leakage or safety accidents due to moisture entering the component.
Existing wet leakage current test devices are usually operated manually. An operator transports the component into a liquid pool, applies a direct current (DC) voltage greater than 500 volts through a voltage-withstanding insulation tester, so as to test the component immersed in the liquid pool, and after the test is finished, manually picks up the component from a bottom of the liquid pool and places the same on a drying rack to be naturally air dried.
The above-mentioned operations have at least the following defects.
For a heavier double-glazed component, when testing, the component is picked up from and placed in the liquid pool by hand, which increases human burden. The natural-air drying process is time-consuming, which influences test and production efficiencies. Moreover, there is an electric shock risk for the operator.
An object of the present disclosure is to provide a wet leakage current test system for a photovoltaic component, so as to solve the above-mentioned problems.
The present disclosure adopts the following technical solution.
A wet leakage current test system for a photovoltaic component, including a liquid pool and a voltage-withstanding insulation tester, further includes: a first storage rack, a lifting actuator, a second storage rack, a drying apparatus and an electrical protection device, wherein the first storage rack is arranged above the liquid pool, mechanically connected with the lifting actuator, and configured to receive the photovoltaic component thereon; the lifting actuator is configured to drive the first storage rack to descend into the liquid pool or ascend above the liquid pool; the drying apparatus is mounted on the second storage rack, and configured to dry the photovoltaic component which moves from the first storage rack onto the second storage rack; and the electrical protection device is in electrical signal connection with the voltage-withstanding insulation tester, and configured to disable a voltage output from the voltage-withstanding insulation tester in the case that an operator operates in a high voltage region, and/or to cut off a power source of the voltage-withstanding insulation tester in an emergency.
Preferably, a first rolling component for moving the photovoltaic component horizontally is arranged on the first storage rack and the second storage rack; and the second storage rack is arranged on one side of the first storage rack, such that the photovoltaic component is capable of moving from the first storage rack onto the second storage rack horizontally.
Preferably, the wet leakage current test system further includes a feed rack and a discharge rack, wherein the feed rack is arranged on one side of the first storage rack away from the second storage rack, and the discharge rack is arranged on one side of the second storage rack away from the first storage rack; a second rolling component for moving the photovoltaic component horizontally is arranged on each of the feed rack and the discharge rack; and the photovoltaic component is capable of moving horizontally from the feed rack to the first storage rack, the second storage rack, and then onto the discharge rack.
Preferably, the drying apparatus includes a first air knife, a second air knife and an air blower connected with each of the first air knife and the second air knife through an air duct, wherein the first air knife is arranged above the second storage rack, and an air outlet of the first air knife faces downwards; and the second air knife is arranged at a bottom of the second storage rack, and an air outlet of the second air knife faces upwards.
Preferably, the electrical protection device includes a grating module and/or a scram module arranged around the liquid pool, wherein the grating module is configured to disable the voltage output from the voltage-withstanding insulation tester after the grating module has detected that a grating region is blocked; and the scram module is configured to cut off the power source of the voltage-withstanding insulation tester after the scram module has been triggered.
Preferably, a plurality of stoppers for limiting the horizontal movement of the photovoltaic component is arranged on the feed rack, the first storage rack, the second storage rack and the discharge rack.
Preferably, the drying apparatus further includes a dehumidification filter which is mounted at the air blower and/or the first air knife and the second air knife.
Preferably, the electrical protection device further includes an audible and visual indication module and a leakage protector, wherein the audible and visual indication module is configured to indicate different states of the wet leakage current test system for the photovoltaic component; and the leakage protector is configured to detect a residual current in a circuit system, so as to avoid electrical accidents in a humid environment.
Preferably, the drying apparatus further includes a heater arranged at the air outlet of the air blower.
Preferably, the wet leakage current test system further includes a limit device for limiting a lifting stroke of the first storage rack.
Preferably, the first rolling component and the second rolling component are each in the form of roller, roll ball or pulley.
Preferably, the stopper is rotatable, and is a laterally arranged pulley, a cylindrical shaft, a cylindrical pin or a cylindrical rod.
Preferably, the first air knife and the second air knife are capable of adjusting an air-out angle and/or an air volume.
The present disclosure further provides a wet leakage current test system for a photovoltaic component, including a liquid pool and a voltage-withstanding insulation tester, wherein the wet leakage current test system further includes a first storage rack, a lifting actuator, a second storage rack, and a drying apparatus, wherein the first storage rack is arranged above the liquid pool, and is mechanically connected with the lifting actuator; the lifting actuator is configured to drive the first storage rack to descend into the liquid pool or ascend above the liquid pool; and the drying apparatus is mounted on the second storage rack and configured to dry the photovoltaic component which moves from the first storage rack onto the second storage rack.
In order to make the object, technical solution and advantages of the present disclosure more apparent, the present disclosure will be described below in detail in combination with the drawings, in which:
1 liquid pool; 2 first storage rack; 3 lifting actuator; 4 second storage rack; 5 drying apparatus; 6 electrical protection device; 7 feed rack; 8 discharge rack; 9 rolling component; 10 stopper; 11 first air knife; 12 second air knife; 13 air blower; 14 air duct; 100 photovoltaic component
The embodiments of the present disclosure are described in detail hereinafter. Examples of the described embodiments are given in the accompanying drawings, in which identical or similar reference numerals constantly denote identical or similar elements, or elements having identical or similar functions. The embodiments described with reference to the drawings are exemplary and merely for explaining the present disclosure, and shall not be construed as limitations of the present disclosure.
The present disclosure provides one embodiment of a wet leakage current test system for a photovoltaic component. With reference to
The drying apparatus 5 may be mounted on the second storage rack 4, for drying the photovoltaic component 100 placed on the second storage rack 4. Specifically, for a double-glazed component, air may be blew to a front surface and a back surface of the photovoltaic component 100 laid flat on the second storage rack 4, and a drying apparatus 5 that blows air in opposite directions is thus adopted in order to dry the two surfaces of the double-glazed photovoltaic component at the same time. In addition, in practical operations, any apparatus which can provide clean and dry air, such as a fan, compressed air, an air blower, an air knife or a combination of a plurality of apparatus, may be used as the drying apparatus 5, and in order to meet the requirements of different components, the drying apparatus 5 can further adjust an air-out angle and/or an air volume.
Next, since the voltage-withstanding insulation tester would generate a relatively high DC voltage during the test, the present embodiment further provides the electrical protection device 6 electrically connected with the voltage-withstanding insulation tester, with a purpose of making it possible to disable a voltage output from the voltage-withstanding insulation tester in the case that an operator operates in a high voltage region, and even cut off a power source of the voltage-withstanding insulation tester in an emergency.
The operation mode of the present embodiment will be explained below in combination with the above-mentioned contents.
when testing, an operator lays the photovoltaic component 100 to be tested flat on the first storage rack 2, starts the lifting actuator 3 such that the first storage rack 2 on which the photovoltaic component 100 is carried descends into the liquid pool 1 and immerses therein, and turns on the voltage-withstanding insulation tester to start the test. After the test is finished, the lifting actuator 3 is started again such that the photovoltaic component 100 ascends above the liquid pool 1. The operator moves the wet photovoltaic component 100 onto the second storage rack 4, and turns on the drying apparatus 5 to dry the two surfaces of the photovoltaic component 100. In the above-mentioned process, in the case that the operator moves the photovoltaic component, the electrical protection device 6 can disable the high voltage output from the voltage-withstanding insulation tester and/or cut off its power source.
As can be seen from the present embodiment, compared with the existing test method, the operator is not needed to bend down to pick up the photovoltaic component 100 from and place it in the liquid pool 1, and the nature-air drying process is abandoned as well. Therefore, the present disclosure is capable of reducing human burden, saving labor costs, improving test and production efficiencies, and further eliminating safety hazards and ensuring the reliability and safety during the test.
In order to make the test operation more convenient, as for the above-mentioned embodiment, the present disclosure provides another preferable solution. As shown in
Further, based on the above-mentioned preferable solution, one may additionally arrange a feed rack 7 and a discharge rack 8, and connect the feed rack 7, the first storage rack 2, the second storage rack 4 and the discharge rack 8 successively, such that the photovoltaic component 100 can move continuously, smoothly and horizontally. As shown in
It is also mentioned above that there may be various types of drying apparatus 5. In another embodiment of the present disclosure, as shown in
In addition, in one preferable solution of the present embodiment, a heater may be arranged at an air outlet of the air blower 13, thereby making hot air blew out from the first air knife 11 and the second air knife 12, so as to accelerate the drying of the photovoltaic component 100 under the dual function of air drying and blowing. Certainly, to this end, an appropriate temperature should be set, and a conventional heating control component such as a temperature sensor and a heat protector may be also provided.
As for the above-mentioned electrical protection device 6, a plurality of existing electrical safety circuits and their components can all realize the function of disabling the voltage output or cutting off the power source. In another preferable embodiment of the present disclosure, a grating module and/or a scram module arranged around the liquid pool 1 is taken as a main structure of the electrical protection device 6, wherein the grating module forms a grating region within an operation range of the liquid pool 1. When the operator enters near the liquid pool 1 to operate, the grating module detects that the grating region is blocked, thereby triggering the voltage-withstanding insulation tester to interrupt the output, that is, to disable the voltage output from the voltage-withstanding insulation tester. In the case of an emergency, the operator may also trigger any handy scram module such as a scram button or an inhaul cable, thereby directly cutting off a power source of the voltage-withstanding insulation tester, and even a power source of the whole test system, so as to ensure adequate safety. Certainly, in order to guarantee no risk at all in the case that there is no emergency, the scram module may be triggered to cut off the power supply. Therefore, the grating module and the scram module can be arranged as needed.
In order to further improve the electrical safety of the system, in one preferable solution of the present embodiment, the electrical protection device 6 may also include an audible and visual indication module and a leakage protector. In the present embodiment, the audible and visual indication module may consist of a plurality of LEDs and a buzzer. For example, a green LED indicates normal, a yellow LED indicates that the grating region is blocked, and a red LED indicates that the scram module is triggered. In addition, the buzzer may make different warning sounds respectively in the case that the yellow LED or the red LED is lightened, so as to alert the operator. The leakage protector is configured to detect a residual current in a circuit system, so as to avoid electrical accidents in a humid environment, and further improve the reliability and safety of the present disclosure.
The configuration, features and effects of the present disclosure are explained in detail in the embodiments shown in the Figures. However, the foregoing merely describes the preferable embodiments of the present disclosure. It should be noted that the technical features in the above-mentioned embodiments and their preferable modes can be reasonably combined into a plurality of equivalent solutions by the person skilled in the art, without departing or changing the design concept and technical effects of the present disclosure. Therefore, the present disclosure is not limited to the implementation scope shown in Figures. All the changes made according to the concepts of the present disclosure, or equivalent embodiments amended by equivalent changes shall fall within the protection scope of the present disclosure without departing the spirits of the present specification and drawings.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201721101267.5 | Aug 2017 | CN | national |
The present application is the U.S. national phase of PCT Application No. PCT/CN2018/091397 filed on Jun. 15, 2018, which claims a priority of the Chinese Patent Application No. 201721101267.5 filed on Aug. 30, 2017, the disclosures of which are incorporated in their entirety by reference herein.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2018/091397 | 6/15/2018 | WO | 00 |
