A test apparatus for simulating foot loading
Patent Information
- Application Number
- CN202521781064.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-20
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-08-20
AI Technical Summary
局部减薄的电池片在面对实际安装使用的过程中无法避免受到不均匀的载荷受力、施工人员的脚踏，会出现组件产品爆裂、人员受伤的情况
[0018]本申请提供了一种用于模拟脚踏载荷的测试设备，包括密闭箱体以及设置在密闭箱体内的光伏组件，密闭箱体的内壁上设置有可伸缩的踩踏工装，踩踏工装垂直面对光伏组件，以通过踩踏工装的伸缩踩踏光伏组件，检测光伏组件的面板无损伤即为合格，密闭箱体内还设置有恒温装置，用于使密闭箱体内的温度恒定；在不同的恒定温度下，通过踩踏工装的伸缩，以踩踏光伏组件的面板，通过检测光伏组件的面板和用于安装光伏组件的安装支架之间的距离，以判定光伏组件的损伤情况，可准确评估光伏组件产品的抗载荷性能，该设备可以模拟真实受力情况，可以将光伏组件的风险点暴露，帮助优化光伏组件产品。
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Figure CN224921560U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of photovoltaic module technology, and more specifically, to a test device for simulating foot loads. Background Technology
[0002] With the rapid development of photovoltaic technology, thin-film technology used in HJT (heterojunction) solar cells is being widely promoted. As silicon wafers become thinner and encapsulation materials become thinner, corresponding module products require new measurement methods to accurately assess their load-bearing capacity and reduce the risk of load failure.
[0003] With the application of thinner photovoltaic module technology and encapsulation materials, module products will become even thinner and lighter. However, locally thinned cells cannot avoid uneven loads and being stepped on by construction workers during actual installation and use, which can lead to module breakage and injuries. The current IEC 61215 standard includes a testing method that applies a uniform pressure of 5400 Pa to the front of the photovoltaic module for 1 hour, and then applies 3600 Pa to the back for 1 hour, repeated three times. However, the IEC 61215 standard does not specify the impact of human foot traffic on the module under different temperatures or provide an evaluation method for special scenarios. Utility Model Content
[0004] The purpose of this application is to address the shortcomings of the prior art by providing a testing device for simulating foot-load, which can test photovoltaic modules at different temperatures, accurately assess the load-bearing capacity of photovoltaic modules, and reduce the risk of load failure of photovoltaic modules.
[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:
[0006] One aspect of this application provides a testing device for simulating foot-step loads, including a sealed chamber, a mounting bracket and a retractable stepping fixture disposed within the sealed chamber, a photovoltaic module mounted on the mounting bracket, and the stepping fixture perpendicularly facing the photovoltaic module. A temperature control device is also provided within the sealed chamber to maintain a constant temperature. Under different constant temperatures, the photovoltaic module panel is stepped on by extending and retracting the stepping fixture, and the damage to the photovoltaic module is determined by detecting the distance between the photovoltaic module panel and the mounting bracket.
[0007] The stepping fixture faces the photovoltaic module vertically. By extending and retracting the fixture, the photovoltaic module is stepped on. If the panel of the photovoltaic module is undamaged, it is considered qualified. The sealed box is also equipped with a constant temperature device to keep the temperature inside the sealed box constant. At different constant temperatures, the photovoltaic module panel is stepped on by extending and retracting the fixture. The distance between the photovoltaic module panel and the mounting bracket used to install the photovoltaic module is measured to determine the damage to the photovoltaic module.
[0008] Optionally, the treadmill includes a telescopic probe and a simulated shoe sole mounted on the telescopic probe. The simulated shoe sole and the telescopic probe are connected by an adjusting bolt, which is used to adjust the distance between the telescopic probe and the simulated shoe sole.
[0009] Optionally, the simulated shoe sole is positioned at a thinner point on the photovoltaic module's projection; the maximum distance between the simulated shoe sole and the photovoltaic module is greater than 55mm.
[0010] Optionally, the pedaling equipment is also connected to a controller, which is connected to a temperature control device. The temperature control device includes a heating platform and a thermometer. The thermometer is used to measure the temperature inside the sealed chamber and send a temperature signal to the controller. The controller controls the heating platform to increase the temperature inside the sealed chamber and controls the pedaling equipment to move at the preset temperature.
[0011] Optionally, the heating platform is located on the side of the photovoltaic module opposite to the stepping tool.
[0012] Optionally, the constant temperature is between 25°C and 85°C.
[0013] Optionally, the simulated sole is made of at least one of foam, polyurethane, and rubber.
[0014] Optionally, the force exerted by the stepping tool on the photovoltaic module is less than or equal to 2500N.
[0015] Optionally, the speed at which the stepping tool moves toward the photovoltaic module is between 20cm / s and 50cm / s, and the frequency of movement is between 30 times / min and 80 times / min.
[0016] Optionally, the treadmill shall have at least two tread points on the photovoltaic module panel, and each tread point shall be treaded at least 500 times.
[0017] The beneficial effects of this application include:
[0018] The present application provides a test apparatus for simulating foot pedal load, comprising a sealed box body and a photovoltaic module disposed inside the sealed box body. A retractable stepping tool is disposed on the inner wall of the sealed box body, and the stepping tool vertically faces the photovoltaic module, so as to step on the photovoltaic module through the extension and retraction of the stepping tool. The photovoltaic module is qualified if no damage is detected on its panel. A constant temperature device is further disposed inside the sealed box body, for keeping the temperature inside the sealed box body constant. At different constant temperatures, the panel of the photovoltaic module is stepped on through the extension and retraction of the stepping tool, and the damage condition of the photovoltaic module is determined by detecting the distance between the panel of the photovoltaic module and the mounting bracket for mounting the photovoltaic module, so that the load resistance performance of the photovoltaic module product can be accurately evaluated. The apparatus can simulate the actual stress condition, expose the risk points of the photovoltaic module, and help optimize the photovoltaic module product. Brief Description of the Drawings
[0019] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore shall not be regarded as a limitation on the scope. For those of ordinary skill in the art, other related accompanying drawings can also be obtained based on these drawings without creative efforts.
[0020] Figure 1 is a schematic structural diagram of a test apparatus for simulating foot pedal load provided by an embodiment of the present application;
[0021] Figure 2 is a schematic structural diagram of a stepping tool provided by an embodiment of the present application;
[0022] Figure 3 is a flowchart of a test method for simulating foot pedal load provided by an embodiment of the present application.
[0023] Reference signs: 100- sealed box body; 10- test apparatus; 200- stepping tool; 210- telescopic probe; 220- simulated shoe sole; 230- adjusting bolt; 300- photovoltaic module; 400- heating platform; 500- mounting bracket. Detailed Description of the Embodiments
[0024] To make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and illustrated in the accompanying drawings herein may be arranged and designed in a variety of different configurations.
[0025] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. It should be noted that, unless otherwise specified, the various features in the embodiments of this application can be combined with each other, and the combined embodiments are still within the protection scope of this application.
[0026] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0027] With the application of thinner photovoltaic module technology and encapsulation materials, module products will become even thinner and lighter. However, locally thinned cells cannot avoid uneven loads and being stepped on by construction workers during actual installation and use, which can lead to module breakage and injuries. Currently, the IEC 61215 standard only addresses the impact of personnel stepping on the module under different temperatures in special scenarios, such as uniformly applying 5400 Pa to the front of the module for 1 hour and 3600 Pa to the back for 1 hour, repeated three times.
[0028] To address the aforementioned issues, this application provides a testing device 10 for simulating foot-step loads, which simulates the uneven force exerted on the surface of a component by a person stepping on it, and evaluates the load-bearing capacity of a thin-film silicon HJT component.
[0029] Specifically, please see Figure 1 As shown: This application provides a test device 10 for simulating foot-step load, including a sealed box 100 for mounting a photovoltaic module 300. The sealed box 100 is provided with a mounting bracket 500 and a retractable stepping fixture 200. The photovoltaic module 300 is mounted on the mounting bracket 500. The stepping fixture 200 faces the photovoltaic module 300 perpendicularly. The photovoltaic module 300 is stepped on by the retraction and extension of the stepping fixture 200. If the panel of the photovoltaic module 300 is undamaged, it is considered qualified.
[0030] A constant temperature device is further arranged inside the sealed box 100, configured to keep the temperature inside the sealed box 100 constant; at different constant temperatures, the panel of the photovoltaic module 300 is stepped on through the extension and retraction of the stepping tooling 200, and the damage condition of the photovoltaic module 300 is determined by detecting the distance between the panel of the photovoltaic module 300 and the mounting bracket 500 for mounting the photovoltaic module 300.
[0031] A testing apparatus 10 for simulating foot load comprises a sealed box 100, a mounting bracket 500, a constant temperature device, and a stepping tooling 200, as shown in Figure 1 the figures.
[0032] In one embodiment of the present application, the photovoltaic module 300 is mounted and fixed on the mounting bracket 500. The mounting bracket 500 may be a steel structural beam, and a heating platform is arranged below the steel structural beam, which can raise the surface temperature of the photovoltaic module 300 through heating.
[0033] In summary, the testing apparatus 10 for simulating foot load provided in the embodiments of the present application comprises a sealed box 100. A retractable stepping tooling 200 is arranged on the inner wall of the sealed box 100, a mounting bracket 500 is further arranged inside the sealed box 100, the mounting bracket 500 is used for arranging the photovoltaic module 300, and the stepping tooling 200 faces the photovoltaic module 300 vertically, so as to step on the photovoltaic module 300 through the extension and retraction of the stepping tooling 200, and it is qualified if no damage is detected on the panel of the photovoltaic module 300. A constant temperature device is further arranged inside the sealed box 100, configured to keep the temperature inside the sealed box 100 constant; at different constant temperatures, the panel of the photovoltaic module 300 is stepped on through the extension and retraction of the stepping tooling 200, and the damage condition of the photovoltaic module 300 is determined by detecting the distance between the panel of the photovoltaic module 300 and the mounting bracket 500 for mounting the photovoltaic module 300. The present application provides a testing apparatus 10 for simulating foot load, which is used to simulate the real situation of personnel stepping and local stress, and evaluate the load resistance performance of the photovoltaic module 300 product. The apparatus can simulate the real stress situation, expose the risk points of the module, and help optimize the module product.
[0034] For example, as shown in Figure 2 the figures, the stepping tooling 200 comprises a retractable probe 210 arranged directly above the photovoltaic module 300, and a simulated sole 220 arranged on the retractable probe 210. The simulated sole 220 and the retractable probe 210 are connected through an adjusting bolt 230, and the adjusting bolt 230 is used for adjusting the distance between the retractable probe 210 and the simulated sole 220.
[0035] Since the mounting bracket 500 is fixed, the relative position of the photovoltaic module 300 is fixed. This application adjusts the distance between the telescopic probe 210 and the simulated shoe sole 220 by adjusting the adjusting bolt 230, so as to change the distance between the simulated shoe sole 220 and the photovoltaic module 300, so as to measure the photovoltaic module 300 at different heights, or make the test equipment 10 for simulating foot load provided by this application applicable to a variety of photovoltaic modules 300, so as to test the photovoltaic module 300 more accurately.
[0036] The simulated sole 220 can be made of different materials. In one embodiment, the simulated sole 220 is made of at least one of the common foam materials, polyurethane materials, and rubber materials. In other embodiments, the simulated sole 220 can also be made of other materials to meet the requirements of the test.
[0037] Furthermore, the simulated sole 220 is positioned at a thinner point in the photovoltaic module 300 on the projection of the photovoltaic module 300 to accurately test the photovoltaic module 300. In one embodiment of this application, the maximum distance between the simulated sole 220 and the photovoltaic module 300 is greater than 55mm. In other embodiments, the maximum distance between the simulated sole 220 and the photovoltaic module 300 is selected according to actual conditions.
[0038] When the stepping fixture 200 steps on the photovoltaic module 300, the applied gravity should be adjustable via the telescopic probe 210. The gravity exerted by the stepping fixture 200 on the photovoltaic module 300 should be less than or equal to 2500N. Excessive gravity on the photovoltaic module 300 will directly damage it. In actual measurements, the gravity exerted by the stepping fixture 200 on the photovoltaic module 300 should be controlled below 2500N.
[0039] The speed at which the stepping tool 200 moves toward the photovoltaic module 300 should also be controlled between 20cm / s and 50cm / s, and the frequency of movement should be between 30 times / min and 80 times / min.
[0040] Specifically, the pedaling fixture 200 is also connected to a controller, which is connected to a temperature control device. The temperature control device includes a heating platform 400 and a thermometer. The thermometer is used to measure the temperature inside the sealed chamber 100 and send a temperature signal to the controller. The controller controls the heating platform 400 to increase the temperature inside the sealed chamber 100 and controls the pedaling fixture 200 to move at the preset temperature.
[0041] In this embodiment, the action of the testing equipment 10 is controlled by a controller. The controller can control the stepping fixture 200, and can set the magnitude and distance of the gravity of the stepping fixture 200 relative to the photovoltaic module 300, as well as the frequency and speed of the stepping fixture 200 during operation. The controller is also connected to a temperature control device, which includes a heating platform 400 and a temperature sensor. The temperature sensor feeds back a temperature signal to the control device, and the control device controls the start and stop of the heating platform 400 to keep the temperature inside the sealed chamber 100 constant.
[0042] In one embodiment of this application, the heating platform 400 is disposed on the side of the photovoltaic module 300 opposite to the stepping fixture 200, which facilitates heating the surface of the photovoltaic module 300 to test the effect of the stepping fixture 200 on the photovoltaic module 300 at different temperatures.
[0043] Specifically, in one embodiment of this application, the constant temperature is between 25°C and 85°C, and different temperature points can be used for testing, such as 25°C, 35°C, 45°C, 55°C, 65°C, 75°C, and 85°C.
[0044] In another aspect of the embodiments of this application, this application provides a test method for simulating foot pedal loads, applied to the test device 10 for simulating foot pedal loads as described above. This test method for simulating foot pedal loads includes the same structure and beneficial effects as the test device 10 for simulating foot pedal loads in the foregoing embodiments. The structure and beneficial effects of the test device 10 for simulating foot pedal loads have been described in detail in the foregoing embodiments and will not be repeated here.
[0045] like Figure 3 The diagram shown is a flowchart of a test method for simulating foot pedal loads according to an embodiment of this application, describing the main process of the test method for simulating foot pedal loads:
[0046] S100: Controls the heating of the thermostat, so that the thermostat is maintained at multiple preset temperatures.
[0047] The test method for simulating foot loads in this application measures the load at multiple different preset temperatures, including 25°C, 35°C, 45°C, 55°C, 65°C, 75°C, and 85°C, to verify the strength of the photovoltaic module 300 at multiple different temperatures.
[0048] S110: Control the stepping tool 200 to step on the photovoltaic module 300 at multiple preset temperatures.
[0049] The controller controls the stepping tool 200 to step on the photovoltaic module 300 at multiple preset temperatures.
[0050] S120: Receive the detection distance between the photovoltaic module 300 and the mounting bracket 500 detected by the detection tool.
[0051] In the embodiments of the present application, the method for detecting the strength of the photovoltaic module 300 is to detect the detection distance between the photovoltaic module 300 and the mounting bracket 500, and the methods for detecting the detection distance include manual detection and laser detection.
[0052] S130: Output a damage result of the panel of the photovoltaic module 300 according to the comparison between the preset distance and the detection distance.
[0053] Specifically, the treading tooling 200 is respectively controlled to tread on the photovoltaic module 300 at a plurality of preset temperatures, and the method further comprises: causing the treading tooling 200 to tread on the photovoltaic module 300 according to a preset frequency and speed.
[0054] As Figure 1 shown, in one embodiment of the present application, the telescopic probe 210 should be capable of adjusting the applied gravity, with a gravity range of 0-2500N. The pressing speed of the telescopic probe 210, that is, the moving speed of the telescopic probe 210 toward the photovoltaic module 300 is between 20 cm / s and 50 cm / s, and the moving frequency is between 30 times / min and 80 times / min.
[0055] The temperature is kept constant through the cooperation of the heating thermostat of the heating device below the photovoltaic module 300 and the temperature measuring device (not shown in the figure). The test method for simulating the foot load is measured at different temperature conditions respectively, and different temperature points are selected within the temperature range of 25°C to 85°C (the temperature points can be 25°C, 35°C, 45°C, 55°C, 65°C, 75°C, 85°C).
[0056] Specifically, in one embodiment of the present application, the number of treading test points for the photovoltaic module 300 shall not be less than two, the number of treading times at each point shall not be less than 500, and the simulated treading frequency shall be controlled at least once per second; the simulated shoe sole 220 shall at least meet a treading height of >50 mm in the test; when installing the photovoltaic module 300, attention shall be paid to adjusting the position of the treading contact point of the simulated shoe sole 220, and the weak middle part of the photovoltaic module 300 shall be selected. If cracking or edge-locking detachment occurs at the glue-applied position of the mounting frame groove on the surface of the photovoltaic module 300, at the edge of the junction box and at the back cover, it is judged as unqualified when a feeler gauge can be inserted. If the panel of the photovoltaic module 300 has no damage, it is judged as qualified.
[0057] The above description is merely the preferred embodiments of the present application, and is not intended to limit the present application. For those skilled in the art, various modifications and variations may be made to the present application. Any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present application shall all be included in the protection scope of the present application.
Claims
1. A testing device for simulating foot pedal load, characterized in that, The device includes a sealed enclosure (100), inside which are installed a mounting bracket (500) and a retractable stepping fixture (200). The mounting bracket (500) is used to install photovoltaic modules (300), and the stepping fixture (200) is perpendicular to the photovoltaic modules (300). The sealed enclosure (100) is also equipped with a temperature control device to keep the temperature inside the sealed enclosure (100) constant. At different constant temperatures, the photovoltaic module (300) is stepped on by the extension and retraction of the stepping tool (200). The damage to the photovoltaic module (300) is determined by detecting the distance between the photovoltaic module (300) panel and the mounting bracket (500).
2. The testing equipment for simulating foot pedal load as described in claim 1, characterized in that, The foot-walking fixture (200) includes a telescopic probe (210) and a simulated shoe sole (220) disposed on the telescopic probe (210). The simulated shoe sole (220) and the telescopic probe (210) are connected by an adjusting bolt (230), which is used to adjust the distance between the telescopic probe (210) and the simulated shoe sole (220).
3. The testing equipment for simulating foot pedal load as described in claim 2, characterized in that, The simulated sole (220) is located at a thinner point in the photovoltaic module (300) on the projection of the photovoltaic module (300); The maximum distance between the simulated shoe sole (220) and the photovoltaic module (300) is greater than 55mm.
4. The testing equipment for simulating foot pedal load as described in claim 1, characterized in that, The pedaling fixture (200) is also connected to a controller, which is connected to the temperature control device. The temperature control device includes a heating platform (400) and a thermometer. The thermometer is used to measure the temperature inside the sealed box (100) and send a temperature signal to the controller. The controller controls the heating platform (400) to increase the temperature inside the sealed box (100) and controls the pedaling fixture (200) to move at a preset temperature.
5. The testing equipment for simulating foot pedal load as described in claim 4, characterized in that, The heating platform (400) is located on the side of the photovoltaic module (300) opposite to the stepping fixture (200).
6. The testing equipment for simulating foot pedal load as described in claim 1, characterized in that, The constant temperature is between 25°C and 85°C.
7. The testing equipment for simulating foot pedal load as described in claim 2, characterized in that, The simulated sole (220) is made of at least one of foam, polyurethane, and rubber.
8. The testing apparatus for simulating foot pedal load as described in any one of claims 1 to 7, characterized in that, The force exerted by the treadmill (200) on the photovoltaic module (300) is less than or equal to 2500N.
9. The testing apparatus for simulating foot pedal load as described in any one of claims 1 to 7, characterized in that, The speed at which the stepping tool (200) moves toward the photovoltaic module (300) is between 20 cm / s and 50 cm / s, and the frequency of movement is between 30 times / min and 80 times / min.
10. The testing apparatus for simulating foot pedal load as described in any one of claims 1 to 7, characterized in that, The stepping tool (200) has at least two stepping points on the photovoltaic module (300) panel, and each stepping point is stepped on at least 500 times.