Perovskite laminated solar cell series assembly

Abstract

The utility model provides a perovskite laminated solar cell series assembly, which comprises a cell body, a conductive fine grid line, a bus main grid bar, a conductive back electrode and a switching conductive bar, and adopts a perovskite laminated structure, so that the solar spectrum absorption range can be widened, and the solar energy efficiency can be improved. The positive and negative electrode insulating strips and the negative electrode insulating strips cover the edges of the bus main grid bars and the conducting back electrode, electric leakage or short circuit can be prevented, the switching conductive strips are made of low-temperature conductive adhesive, the problem of material degradation caused by traditional high-temperature welding is avoided, the switching conductive strips and the positive and negative electrode insulating strips form mechanical interlocking through the switching notch structure, and the service life of the switching conductive strips is prolonged. The connection strength is enhanced, the contact reliability is ensured, the switching conductive strips adopt a double-sided conduction design and are seamlessly connected with the confluence main grid bars and the conducting back electrodes, low-resistance series connection between adjacent battery pieces is realized, the current transmission loss is reduced compared with that of traditional welding, and the operation stability of the solar battery piece assembly is remarkably improved.

Description

Technical Field

[0001] This utility model relates to solar cells, and more particularly to a perovskite tandem solar cell series assembly. Background Technology

[0002] Perovskite solar cells utilize perovskite-type organometal halide semiconductors as light-absorbing materials. They typically consist of a transparent conductive substrate, a carrier transport layer (including electron and hole transport layers), a perovskite layer, and metal electrodes. In operation, these cells require fine metal grids or transparent conductive oxides on their light-receiving surface to collect and conduct photocurrent. A full-coverage metal layer serves as the negative electrode on the back. Furthermore, multiple cells need to be connected in series using metal solder strips to connect the front electrode of one cell to the back electrode of the next, thus superimposing the voltages of multiple cells and increasing the overall output voltage of the module. However, this soldering process involves high temperatures, and perovskite solar cells are not heat-resistant. Exceeding their maximum tolerance temperature causes the perovskite material to decompose, significantly reducing photoelectric conversion efficiency and making soldering difficult. Therefore, it is necessary to design a series-connected perovskite tandem solar cell module to overcome these shortcomings. Utility Model Content

[0003] The purpose of this invention is to provide a perovskite tandem solar cell series assembly to facilitate series operation and ensure its photoelectric conversion efficiency.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A perovskite tandem solar cell module includes:

[0006] The solar cell body consists of several components, which are made of perovskite tandem solar cells cut and arranged sequentially.

[0007] The conductive fine grid line is provided in several parts, and each conductive fine grid line is attached to the light-receiving surface of the solar cell body. It is connected to the surface of the solar cell body and conducts through it, so that the current generated in the solar cell body can be led out through the conductive fine grid line.

[0008] The current-collecting main grid bar has several components. Each current-collecting main grid bar is attached to the light-receiving surface of the solar cell body and connected to the conductive fine grid line for conduction. The current-collecting main grid bar collects the current drawn from the conductive fine grid line and serves as the positive electrode part of the solar cell body.

[0009] A conductive back electrode is attached to the back surface of the battery cell body, and it is connected to the surface of the battery cell body to conduct electricity, and serves as the negative electrode part of the battery cell body.

[0010] Also includes:

[0011] The conductive strip is provided in several parts. Each conductive strip is located between adjacent battery cells and is connected to the busbar and the back electrode, so that the positive and negative portions of adjacent battery cells are connected in series.

[0012] In one embodiment of this utility model, each battery cell body is formed into a rectangular structure by cutting a perovskite tandem solar cell.

[0013] In one embodiment of this utility model, the main busbar is made of tin-plated copper strip.

[0014] In one embodiment of this utility model, the adapter conductive strip is made of low-temperature conductive adhesive.

[0015] In one embodiment of the present invention, the negative electrode portion of the battery cell body is provided with a negative electrode insulating strip, which is attached to the edge of the battery cell body, covers the edge of the conductive back electrode, and exposes the edge of the busbar strip.

[0016] The positive electrode portion of the cell body is provided with a positive electrode insulating strip, which is attached to the edge of the cell body, covers the edge of the busbar, and exposes the edge of the conductive back electrode.

[0017] In one embodiment of this utility model, the two ends of the adapter conductive strip are respectively connected to the negative electrode insulating strip and the positive electrode insulating strip, the front edge of which is connected to the edge of the busbar main grid strip and the back edge of which is connected to the edge of the conductive back electrode.

[0018] In one embodiment of this utility model, the inner walls of the negative electrode insulating strip and the positive electrode insulating strip are respectively provided with transition recesses, and the two ends of the transition conductive strip are respectively embedded in the transition recesses to increase the structural strength between the transition conductive strip and the negative electrode insulating strip and the positive electrode insulating strip.

[0019] The advantages of this utility model are:

[0020] This solar cell series module adopts a perovskite stacked structure, which can broaden the solar spectrum absorption range. Its positive and negative electrode insulating strips, as well as the negative electrode insulating strip covering the edges of the busbar and the conductive back electrode, can prevent leakage or short circuit. The connecting conductive strip is made of low-temperature conductive adhesive, which matches the thermal sensitivity of perovskite material and avoids the material degradation problems caused by traditional high-temperature welding. The connecting notch structure makes the connecting conductive strip and the positive and negative electrode insulating strips mechanically interlocked, which not only enhances the connection strength but also ensures the contact reliability and can effectively resist thermal cycling stress. The connecting conductive strip adopts a double-sided conductive design, with the front side precisely aligning with the edge of the busbar and the back side seamlessly connecting with the conductive back electrode, realizing low-resistance series connection between adjacent cells. The current transmission loss is reduced compared to traditional welding, significantly improving the operational stability of the solar cell module. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the perovskite tandem solar cell assembly proposed in this utility model;

[0022] Figure 2 yes Figure 1 A magnified close-up of point A in the middle. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0024] like Figure 1 , Figure 2As shown, the perovskite tandem solar cell series module proposed in this utility model includes a cell body 100, conductive fine grid lines 200, busbars 300, conductive back electrode 400, and connecting conductive strips 500. The cell body comprises several components, which are cut and shaped from perovskite tandem solar cells and arranged sequentially. The conductive fine grid lines are also comprised of several components, each attached to the light-receiving surface of the cell body, and connected to the surface of the cell body for conduction, allowing the current generated in the cell body to be led out through the conductive fine grid lines. The busbars are also comprised of several components. Each main busbar is attached to the light-receiving surface of the solar cell body and connected to the conductive fine grid line. The main busbar collects the current drawn from the conductive fine grid line and serves as the positive electrode of the solar cell body. The conductive back electrode is attached to the back surface of the solar cell body and connected to the surface of the solar cell body, serving as the negative electrode of the solar cell body. Several connecting conductive strips are provided, each of which is located between adjacent solar cells and is connected to the main busbar and the conductive back electrode, so that the positive and negative electrodes of adjacent solar cells are connected in series.

[0025] In this embodiment, each cell body is formed into a rectangular structure by cutting a perovskite tandem solar cell.

[0026] In this embodiment, the main busbar is made of tin-plated copper strip.

[0027] In this embodiment, the connecting conductive strip is made of low-temperature conductive adhesive, which has a bonding temperature of 90℃~120℃ and has little impact on the battery cell body.

[0028] In this embodiment, the negative electrode portion of the battery cell body is provided with a negative electrode insulating strip 600. The negative electrode insulating strip is attached to the edge of the battery cell body, covering the edge of the conductive back electrode and exposing the edge of the busbar.

[0029] The positive electrode portion of the cell body is provided with a positive electrode insulating strip 700, which is attached to the edge of the cell body, covers the edge of the busbar and exposes the edge of the conductive back electrode.

[0030] In this embodiment, the two ends of the adapter conductive strip are respectively connected to the negative electrode insulating strip and the positive electrode insulating strip, the front edge of which is connected to the edge of the busbar main grid strip and the back edge of which is connected to the edge of the conductive back electrode.

[0031] In this embodiment, the inner walls of the negative electrode insulating strip and the positive electrode insulating strip are respectively provided with transition recesses 800, and both ends of the transition conductive strip are respectively embedded in the transition recesses to increase the structural strength between the transition conductive strip and the negative electrode insulating strip and the positive electrode insulating strip. The edge of the battery cell body is provided with a transition slope, and a wedge-shaped groove 900 is formed between the transition slope and the busbar and the conductive back electrode. The negative electrode insulating strip and the positive electrode insulating strip are respectively embedded in the wedge-shaped groove to increase the structural strength between the negative electrode insulating strip and the positive electrode insulating strip and the battery cell body.

[0032] In the description of this utility model, it should be noted that when terms such as "upper," "lower," "inner," "outer," "left," and "right" appear to indicate orientation or positional relationships, they should be understood as being based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product of this utility model is in use, or the orientation or positional relationships commonly understood by those skilled in the art. These terms are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, when terms such as "first" and "second" appear, they are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that unless otherwise explicitly specified and limited, terms such as "installation," "setting," and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A perovskite tandem solar cell module, comprising: The solar cell body consists of several components, which are made of perovskite tandem solar cells cut and arranged sequentially. The conductive fine grid line is provided in several parts, and each conductive fine grid line is attached to the light-receiving surface of the solar cell body. It is connected to the surface of the solar cell body and conducts through it, so that the current generated in the solar cell body can be led out through the conductive fine grid line. The current-collecting main grid bar has several components. Each current-collecting main grid bar is attached to the light-receiving surface of the solar cell body and connected to the conductive fine grid line for conduction. The current-collecting main grid bar collects the current drawn from the conductive fine grid line and serves as the positive electrode part of the solar cell body. A conductive back electrode is attached to the back surface of the battery cell body, and it is connected to the surface of the battery cell body to conduct electricity, and serves as the negative electrode part of the battery cell body. Its characteristic is that it further includes: The conductive strip is provided in several parts. Each conductive strip is located between adjacent battery cells and is connected to the busbar and the back electrode, so that the positive and negative portions of adjacent battery cells are connected in series.

2. The perovskite tandem solar cell series module according to claim 1, characterized in that: Each cell body is made by cutting perovskite tandem solar cells into a rectangular structure.

3. The perovskite tandem solar cell series module according to claim 1, characterized in that: The main busbar is made of tin-plated copper strip.

4. The perovskite tandem solar cell series module according to claim 1, characterized in that: The adapter conductive strip is made of low-temperature conductive adhesive.

5. A perovskite tandem solar cell series module according to claim 1, characterized in that: The negative electrode portion of the battery cell body is provided with a negative electrode insulating strip, which is attached to the edge of the battery cell body, covers the edge of the conductive back electrode, and exposes the edge of the busbar. The positive electrode portion of the cell body is provided with a positive electrode insulating strip, which is attached to the edge of the cell body, covers the edge of the busbar, and exposes the edge of the conductive back electrode.

6. A perovskite tandem solar cell series module according to claim 5, characterized in that: The two ends of the adapter conductive strip are respectively connected to the negative electrode insulating strip and the positive electrode insulating strip. Its front edge is connected to the edge of the busbar main grid and is conductive. Its back edge is connected to the edge of the conductive back electrode.

7. A perovskite tandem solar cell series module according to claim 1, characterized in that: The inner walls of the negative and positive insulating strips are respectively provided with transition recesses, and the two ends of the transition conductive strip are respectively embedded in the transition recesses to increase the structural strength between the transition conductive strip and the negative and positive insulating strips.

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