CN111769178B - A method and device for repairing a hot spot at the corner of a flexible photovoltaic module cell - Google Patents

Abstract

The invention discloses a method for repairing a corner hot spot of a flexible photovoltaic module battery, which comprises the following steps: s1, carrying out IR test on a flexible photovoltaic module battery, screening out photovoltaic module batteries with hot spots at corners, and marking the positions of the hot spots; s2, heating the marked part of the photovoltaic module battery with the hot spot on the corner; and S3, covering the magnetic plate above the marked part of the photovoltaic module cell with the hot spot, and attracting the stainless steel substrate of the photovoltaic module cell by magnetic force. The utility model provides a prosthetic devices of flexible photovoltaic module battery bight focus, includes the platform, and the heater is installed at the top of platform, is provided with the magnetic sheet directly over the heater, and the top fixedly connected with cylinder of magnetic sheet, and the cylinder keeps away from the one end fixedly connected with support of magnetic sheet, and the support is fixed on the platform. According to the technical scheme, the magnetic force of the magnetic plate on the stainless steel of the battery is utilized to repair the corner deformation of the battery, so that corner hot spots are eliminated, and the production yield and the use reliability of the flexible photovoltaic module are greatly improved.

Description

A method and device for repairing hot spots at the corners of flexible photovoltaic modules

technical field

The invention belongs to the technical field of photovoltaic module production, in particular to a method and device for repairing hot spots at the corners of flexible photovoltaic module cells.

Background technique

In the production of flexible photovoltaic modules, because the flexible battery is coated with stainless steel as the substrate, the thickness of the whole battery is only tens of microns, which is very thin. During the production and laying process of the battery, it is very easy to cause the corners to bend. It is easy to form a local micro-short circuit. The reason for the short circuit is that the corner of the bent battery pierces the membrane layer of the adjacent battery and directly contacts the stainless steel of the adjacent battery, resulting in direct contact between the positive electrode of the battery and the positive electrode of the adjacent battery, that is, a short circuit (see attached picture 4). Because the battery has been packaged into the module, the module structure is: front plate, hot melt adhesive, battery, hot melt adhesive, back plate. From the perspective of the module structure, there is no way to directly contact the battery to repair its deformation.

At present, the processing method for hot spot components is to carry out current simulation test to simulate whether the components can withstand the damage caused by local high temperature when working outdoors. If the damage is small or not damaged, it is judged as a qualified product. If the damage is serious, such as the burnt area of the front plate is large Or if the local temperature is too high, it will be judged as unqualified, and the components will be scrapped. This treatment method cannot fundamentally solve the hot spot problem. Although the scrap rate is high, the components with slight damage are judged to be qualified, but there are still risks in outdoor use.

SUMMARY OF THE INVENTION

Aiming at the problems of the above-mentioned prior art, the present invention provides a method and a device for repairing hot spots at the corners of cells of flexible photovoltaic modules.

The present invention solves the above-mentioned technical problems through the following technical means: a method for repairing hot spots at the corners of flexible photovoltaic module cells, comprising the following steps:

S1. Carry out IR test on the flexible photovoltaic module cells, screen out the photovoltaic module cells with hot spots at the corners, and mark the location of the hot spots;

S2. Heat the marked parts of the photovoltaic module cells with hot spots at the corners to above 60°C;

S3. Take a magnetic plate to cover the marked part of the photovoltaic module battery where the hot spot occurs, and magnetically attract the stainless steel substrate of the photovoltaic module battery.

Further, in the step S2, heating is performed in a circular heating manner, and the circular heating is centered on the marked part of the photovoltaic module cell, and the heating temperature gradually decreases from the center to the surrounding.

Further, in the step S3, when the magnetic plate is covered over the marked part of the photovoltaic module cell where the hot spot occurs, the magnetic plate is in contact with the marked part of the photovoltaic module cell where the hot spot occurs, and the magnetic plate does not apply to the marked part of the photovoltaic module cell. pressure.

Further, there is step S4 after step S3, and the specific process is as follows:

Carry out IR test on photovoltaic module cells again, and reject unqualified photovoltaic module cells.

A device for repairing hot spots at the corners of flexible photovoltaic module cells, including a platform, a heater is installed on the top of the platform, a magnetic plate is arranged directly above the heater, and a cylinder is fixedly connected to the top of the magnetic plate. The cylinder is arranged vertically, and the end of the cylinder away from the magnetic plate is fixedly connected with a bracket, and the bracket is fixed on the platform.

Further, a laser emitter is also included, and the laser emitter emits laser light to irradiate the center of the top of the heater.

Further, the heater is a plurality of annular heaters arranged coaxially, and the diameters of the annular heaters increase sequentially.

The beneficial effects of the present invention are as follows: a method and device for repairing hot spots at the corners of flexible photovoltaic modules proposed by the technical solution use the magnetic force of the magnetic plate on the stainless steel of the battery to repair the deformation of the corners of the battery, thereby eliminating the hot spots at the corners and greatly improving Production yield and reliability of flexible photovoltaic modules.

The device for repairing hot spots at the corners of flexible photovoltaic module cells proposed by this technical solution has the advantages of simple structure, high repair efficiency, and low production cost.

The heater is set as a plurality of coaxial ring heaters, and the temperature adjustment of a single ring heater can realize the gradual setting of the temperature, so as to avoid the deformation of the components and the generation of new defects when the components are locally heated.

Description of drawings

Figure 1 is a schematic diagram of a hot spot repair device at the corner of a flexible component;

Figure 2 is a schematic diagram of hot spot repair at the corner of the module;

Fig. 3 is a schematic diagram of the heater;

Figure 4 is a defective flexible photovoltaic module.

In the figure: 1 platform, 2 heater, 3 magnetic plate, 4 cylinder, 5 bracket, 6 laser emitter, 7 flexible photovoltaic module.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example

As shown in Figures 1 to 3, a method for repairing hot spots at the corners of flexible photovoltaic module cells includes the following steps:

S1. Carry out IR test on the flexible photovoltaic module cells, screen out the photovoltaic module cells with hot spots at the corners, and mark the location of the hot spots;

S2. Heat the marked part of the photovoltaic module battery with a hot spot at the corner to above 60 ° C, and heat it in a circular heating manner. The annular heating is centered on the marked part of the photovoltaic module battery, and the heating temperature gradually decreases from the center to the surrounding area;

S3. Take a magnetic plate to cover the marked part of the photovoltaic module battery where the hot spot occurs, and magnetically attract the stainless steel substrate of the photovoltaic module battery. When the magnetic plate covers the marked part of the photovoltaic module cell where the hot spot occurs, the magnetic plate is in contact with the marked part of the photovoltaic module cell where the hot spot occurs, and the magnetic plate does not apply pressure to the marked part of the photovoltaic module cell.

S4. Carry out IR test on the photovoltaic module cells again, and reject unqualified photovoltaic module cells.

A method for repairing hot spots at the corners of flexible photovoltaic modules proposed in this technical solution uses the magnetic force of the magnetic plate on the stainless steel of the batteries to repair the deformation of the corners of the batteries, thereby eliminating hot spots at the corners and greatly improving the production yield and usage of flexible photovoltaic modules reliability.

A device for repairing hot spots at the corners of flexible photovoltaic module cells, comprising a platform 1, characterized in that a heater 2 is installed on the top of the platform 1, and a magnetic plate 3 is arranged directly above the heater 2, and the magnetic plate 3 A cylinder 4 is fixedly connected to the top of the plate 3 , and the cylinder 4 is vertically arranged, and an end of the cylinder 4 away from the magnetic plate 3 is fixedly connected to a support 5 , and the support 5 is fixed on the platform 1 .

The device for repairing hot spots at the corners of flexible photovoltaic module cells proposed by this technical solution has the advantages of simple structure, high repair efficiency, and low production cost.

A laser emitter 6 is also included, and the laser emitter 6 emits laser light to irradiate the center of the top of the heater 2 . The laser emitter 6 emits laser light to irradiate the heater 2 to indicate the heating repair position, which is convenient for operation.

The heater 2 is a plurality of annular heaters arranged coaxially, and the diameters of the annular heaters increase sequentially. The heater 2 is set as a plurality of coaxial annular heaters, and the temperature adjustment of a single annular heater can realize the gradual setting of the temperature, so as to avoid the deformation of the components and the generation of new defects when the components are locally heated. In this embodiment, the heater 2 is composed of 6 sub-ring heaters. The temperature setting of each ring heater is different. The temperature of the heater in the center is the highest, and the further outside, the lower the temperature. The typical temperature setting is: From the inside to the end, it is 160°C, 140°C, 120°C, 100°C, 80°C, 60°C. The function of the heater 2 is to locally heat the hot spot area at the corner of the component to melt the hot melt adhesive of the component. At this time, the battery inside the component can be deformed freely, which provides feasibility for the repair of hot spots at the corners. The temperature of the heater in the center is the main working temperature. The purpose of the temperature gradient setting of other heaters is to prevent the high temperature of the heated area of the component and the low temperature of the unheated area. This sudden change in temperature will cause local deformation of the component and affect the appearance of the component. , Gradient temperature settings can avoid deformation of components due to local heating.

The working process of this device is as follows: After the components pass the conventional IR test, the hot spot components at the corners can be screened out and the position of the hot spot can be marked. Put the hot spot component on the platform 1 of the device, turn on the laser transmitter 6, and the device will emit Low-energy laser, and the laser is irradiated to the center of the heater 2, directly above the position is the cylinder 4 and the magnetic plate 3, and the hot spot of the component is aligned with the laser irradiation point, so that the positioning of the component is realized, and the cylinder 4 is turned on. The cylinder 4 stretches out to drive the magnetic plate 3 to move down, the magnetic plate 3 is pressed to the surface of the component, and the component starts to heat up. The heater 2 has been turned on in advance and kept on. When the hot melt adhesive on the battery starts to melt, the battery is bent. Under the action of the magnetic force of the upper magnetic plate 3, the corners begin to recover upward. After the recovery, the hot spot of the component will disappear. Remove the component, cool the component slowly, and conduct the IR test again. If the test is passed, it can be released.

It should be noted that in this article, if there are relational terms such as first and second, etc., they are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations Any such actual relationship or order exists between. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be described in the foregoing embodiments Modifications are made to the recorded technical solutions, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (6)

1. A method for repairing a hot spot at the corner of a flexible photovoltaic module cell, comprising the following steps: S1. Carry out IR test on the flexible photovoltaic module cells, screen out the photovoltaic module cells with hot spots at the corners, and mark the location of the hot spots; S2. Heat the marked parts of the photovoltaic module cells with hot spots at the corners to above 60°C; S3. Take the magnetic plate and cover it on the marked part of the photovoltaic module battery where the hot spot appears, and magnetically attract the stainless steel substrate of the photovoltaic module battery; There is also step S4 after step S3, and the specific process is as follows: Carry out IR test on photovoltaic module cells again, and reject unqualified photovoltaic module cells. 2. The method for repairing the hot spot at the corner of a flexible photovoltaic module cell according to claim 1, characterized in that, in the step S2, heating is adopted in a ring-shaped manner, and the ring-shaped heating takes the marked part of the photovoltaic module cell as the center, and heats The temperature gradually decreases from the center to the surrounding. 3. A method for repairing hot spots at the corners of flexible photovoltaic module cells according to claim 2, characterized in that, in the step S3, when the magnetic plate is covered over the marked part of the photovoltaic module battery where the hot spot occurs, the magnetic plate will Contact with the marked part of the photovoltaic module cell where the hot spot occurs, and the magnetic plate does not apply pressure to the marked part of the photovoltaic module cell. 4. A device for repairing hot spots at the corners of flexible photovoltaic module cells, including a platform (1), characterized in that a heater (2) is installed on the top of the platform (1), and the front of the heater (2) is A magnetic plate (3) is arranged above, and a cylinder (4) is fixedly connected to the top of the magnetic plate (3), the cylinder (4) is vertically arranged, and the end of the cylinder (4) away from the magnetic plate (3) is fixed A bracket (5) is connected, and the bracket (5) is fixed on the platform (1). 5. The device for repairing hot spots at the corners of flexible photovoltaic module cells according to claim 4, characterized in that it also includes a laser emitter (6), and the laser emitter (6) emits laser light to irradiate the heater (2 ) top center. 6. A device for repairing hot spots at the corners of flexible photovoltaic module cells according to claim 4 or 5, characterized in that the heater (2) is a plurality of coaxial ring heaters, and the ring heaters The diameters increase sequentially.

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