Thin film battery assembly for optimizing edge light utilization

Abstract

The utility model discloses a thin-film battery assembly for optimizing edge light utilization. The thin-film battery assembly comprises a thin-film assembly laminating piece and an assembly frame, the thin film assembly laminated member comprises: front glass having a light incident surface and a light emergent surface which are opposite to each other; the front adhesive film, the battery layer, the back adhesive film, the back glass and the adhesive are stacked on the light emitting surface; the assembly frame is clamped at the outer edge of the thin film assembly laminated piece, the upper end surface of the assembly frame is higher than the light incident surface, and the height difference between the upper end surface and the light incident surface is H; the battery layer is formed by connecting a plurality of sub-batteries in an array in series, the width of each sub-battery is W, bypass diodes are arranged on the sub-batteries close to the two sides of the assembly frame in parallel, and the row number P of the sub-batteries connected with the bypass diodes on the two sides, the height difference H and the width W of the sub-batteries meet the following relational expression: P = (XH + Y) / W, in the formula, the value range of X is 2.5-3.0, the value range of Y is 4.0-5.0, and P is an integer value.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic components, in particular to a thin-film battery component for optimizing edge light utilization. Background Art

[0002] At present, the manufacturing process of large-area thin-film solar cell modules is mainly to divide them into several sub-cells of equal width through four laser scribing processes P1, P2, P3, and P4 or mechanical scribing processes. These sub-cells are connected in series to form a cell string, and then encapsulated into large-area thin-film battery modules through glass, packaging film, and butyl glue (adhesive) on all sides.

[0003] To increase the mechanical strength of thin-film solar modules, a module frame is usually set on the edge of the thin-film solar module. However, when thin-film solar modules are designed with equal-width sub-cells connected in series, due to the light-blocking structure on the edge (the blocking structure includes butyl rubber and the module frame), when sunlight is incident at an oblique angle in the morning and evening, the sub-cells close to the module frame will be blocked by the module frame or butyl rubber due to the large incident angle, resulting in a smaller photocurrent generated by the blocked sub-cells. Moreover, because the thin-film solar module is a series structure, the current in the module depends on the minimum current of each sub-cell. Therefore, this causes the overall power generation ratio of the thin-film solar module to decrease. The decrease ratio can be approximately converted to: 1-D / W, where D represents the width of the sub-cell blocked by the module frame and / or butyl rubber, and W represents the width of the sub-cell. Therefore, when there is severe shading, the hot spot cell in a series circuit is used as a load to consume the energy generated by other illuminated sub-cell components in the entire series circuit, resulting in lower efficiency of the entire thin-film battery component, causing local heating, and subsequently greatly reducing the service life of the thin-film battery component, and even causing fire problems. Utility Model Content

[0004] The purpose of the present invention is to address the problem that when sunlight is incident at an oblique angle in the morning and evening, the light-receiving surface of the sub-cell close to the component frame will be blocked due to the large incident angle of the light, thereby causing the blocked sub-cell to generate a smaller photocurrent, which in turn affects the overall power generation of the thin-film battery component, causes local heating, affects the service life of the component, and even causes a fire. The present invention designs a thin-film battery component that optimizes the utilization of edge light, which effectively solves the above problem. The thin-film battery component of the present invention can eliminate the current limiting effect caused by edge blocking, so that the component can work normally and generate electricity under large-angle light in the morning and evening.

[0005] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical solutions:

[0006] The utility model designs a thin film battery assembly for optimizing edge light utilization, the thin film battery assembly comprises: a thin film assembly laminate and an assembly frame;

[0007] Wherein, the film assembly laminate comprises:

[0008] a front glass having a light incident surface and a light exiting surface opposite to each other;

[0009] and a front adhesive film, a perovskite cell layer, a back glass and an adhesive for bonding the front glass and the back glass during lamination, which are sequentially stacked on the light-emitting surface;

[0010] The component frame is clamped to the outer edge of the thin film component laminate, the upper end surface of the component frame is higher than the light incident surface, and the height difference between the upper end surface of the frame and the light incident surface is H;

[0011] In which, the perovskite cell layer is composed of several rows of sub-cells arranged in an array and connected in series, and the width of the sub-cell is W (mm), and bypass diodes are arranged in parallel on the sub-cells close to both sides of the component frame (specifically on both sides that form an inclination angle with the component frame when the sunlight is obliquely incident in the morning and evening), and the number of rows P of sub-cells connected to the bypass diodes on both sides and the height difference H and the width of the sub-cell is W satisfy the following relationship: P = (XH + Y) / W; where: X is in the range of 2.5 to 3.0, Y is in the range of 4.0 to 5.0, and P is an integer value.

[0012] Specifically, the thin-film battery module designed in the present invention optimizes edge light utilization, and adjusts the sub-battery width W, the number of rows P of sub-batteries connected to the bypass diodes, and the height H of the component frame above the light entrance and exit surfaces so that the three meet a specific proportional relationship, thereby eliminating the current limiting effect caused by edge obstruction, allowing the thin-film battery module to work normally and generate electricity under large-angle sunlight in the morning and evening.

[0013] Furthermore, a thin-film battery assembly that optimizes edge light utilization: the bypass diodes on both sides are arranged on the same side of the battery layer or alternately arranged on different sides of the battery layer.

[0014] Furthermore, a thin-film battery assembly for optimizing edge light utilization is provided: the sub-batteries and bypass diodes on the same surface are arranged with opposite polarities.

[0015] Furthermore, a thin-film solar cell assembly that optimizes edge light utilization: X=2.96, Y=4.54.

[0016] Furthermore, a thin-film solar cell assembly that optimizes edge light utilization: the bypass diode is configured to be in a strip or block shape, or other irregular shapes.

[0017] Beneficial effects of the utility model:

[0018] (1) The thin-film battery module of the present invention sets corresponding bypass diodes in parallel on the shielded sub-cells. When the module frame shields the adjacent sub-cells, the shielded sub-cells are likely to become hot spot sub-cells. The setting of the bypass diodes can isolate the hot spot sub-cells from the series circuit, thereby achieving the purpose of reducing the hot spot temperature and power loss of the thin-film battery module.

[0019] (2) The present invention sets a bypass diode in parallel at the bottom or top of the sub-cell close to the module frame, and optimizes the relationship among the number of rows P of sub-cells connected to the bypass diode, the height H of the module frame above the light-entry surface, and the width W of the sub-cell, thereby eliminating the current limiting effect caused by edge shading, so that the thin-film battery module can work normally and generate electricity under large-angle sunlight in the morning and evening. The module of the present invention establishes the relationship between the shading loss of the photovoltaic module frame and the position of the sun (morning and evening) and the height of the module frame, effectively avoiding the impact of module frame shading, and improving the total power generation and power generation efficiency of the thin-film battery module under the same conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a schematic diagram of the shielding of the sub-cells by the module frame in Example 1 of the present utility model, that is, a schematic diagram of the oblique angle formed with the module frame when sunlight is incident obliquely in the morning and evening;

[0022] Figure 2 This is a schematic structural diagram of a thin-film battery assembly for optimizing edge light utilization in Example 1 of the present utility model.

[0023] Markings in the figure: 1-front glass, 2-front film, 3-perovskite cell layer, 4-back glass, 5-adhesive, 6-module frame, 7-bypass diode, 11-light incident surface, 12-light emitting surface, 31-sub-cell, 61-top end surface of the frame. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicating directions or positional relationships, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0026] Example 1

[0027] like Figures 1-2 As shown, in this embodiment 1, a thin film battery assembly for optimizing edge light utilization is designed, and the thin film battery assembly includes: a thin film assembly laminate and an assembly frame 7;

[0028] Wherein, the film assembly laminate comprises:

[0029] The front glass 1 has a light incident surface 11 and a light emitting surface 12 opposite to each other;

[0030] and a front adhesive film 2, a perovskite cell layer 3, a back glass 4, and an adhesive 5 for bonding the front glass 1 and the back glass 4 during component lamination, which are sequentially stacked on the light-emitting surface 12;

[0031] The component frame 6 is clamped to the outer edge of the thin film component laminate, and the upper end surface 61 of the component frame 6 is higher than the light incident surface 11, and the height difference between the upper end surface 61 and the light incident surface 11 is H (set to H = 0.5 mm);

[0032] The perovskite cell layer 3 is composed of several rows of sub-cells 31 arranged in an array and connected in series, and the width of the sub-cell 31 is W (set to W = 8.0 mm). When sunlight is incident obliquely in the morning and evening, an inclination angle α is formed with the left and right sides of the component frame 6. Due to the existence of the inclination angle α, the sub-cells 31 close to the left and right sides of the component frame 6 are blocked. Therefore, a bypass diode 7 is set in parallel on the sub-cell 31 close to the component frame 6. The number of rows P of sub-cells 31 connected to the bypass diode 7 on the left and right sides of the thin-film battery component, the height difference H, and the width W of the sub-cell 31 satisfy the following relationship : P = (XH + Y) / W; where: X = 2.96, Y = 4.54, and P = 0.75 is calculated, then P takes an integer value of 1, and the number of rows of sub-batteries 31 on the left and right sides connected in parallel with bypass diodes 7 is 1, that is, a bypass diode 7 is connected in parallel to the first sub-battery 31 on the left and right sides of the component (specifically, the bypass diodes 7 on the left and right sides can be arranged on the same side of the battery layer 3 or alternately arranged on different sides of the battery layer 3, the polarities of the sub-batteries 31 and the bypass diodes 7 on the same surface are arranged in opposite directions, and the shape of the bypass diodes 7 can be set to strips, blocks or other irregular shapes).

[0033] In the thin-film battery assembly of the above-mentioned embodiment 1, a bypass diode 7 is connected in parallel to the first sub-battery 31 on the left and right sides of the edge. Finally, after the leads at both ends of the battery layer 3 form an electrical circuit, the packaging material is laid and laminated to obtain a perovskite thin-film battery assembly. This avoids the problem of the thin-film battery assembly being blocked by the shadow of the assembly frame in the morning and evening (corresponding to the east-west direction, i.e. the left and right sides) due to the large incident angle of sunlight in the morning and evening, resulting in a decrease in the overall power generation ratio and hot spots, thereby increasing the total power generation of the thin-film battery assembly.

[0034] The above preferred embodiments of the present invention are only used to explain the present invention and are not intended to limit the present invention. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A thin-film solar cell assembly for optimizing edge light utilization, characterized in that: The thin film battery assembly comprises: a thin film assembly laminate and an assembly frame (6); Wherein, the film assembly laminate comprises: A front glass (1) having a light incident surface (11) and a light emitting surface (12) opposite to each other; and a front adhesive film (2), a perovskite cell layer (3), a back glass (4) and an adhesive (5) for bonding the front glass (1) and the back glass (4) during lamination, which are sequentially stacked on the light-emitting surface (12); The component frame (6) is clamped to the outer edge of the film component laminate, the upper end surface (61) of the component frame (6) is higher than the light incident surface (11), and the height difference between the upper end surface (61) and the light incident surface (11) is H; The perovskite battery layer (3) is formed by connecting a plurality of rows of sub-batteries (31) in series, and the width of the sub-battery (31) is W (mm). Bypass diodes (7) are provided in parallel on the sub-batteries (31) near both sides of the component frame (6), and the number of rows P of sub-batteries (31) connected to the bypass diodes (7) on both sides, the height difference H, and the width W of the sub-battery (31) satisfy the following relationship: P = (XH + Y) / W; wherein: X is in the range of 2.5 to 3.0, Y is in the range of 4.0 to 5.0, and P is an integer value.

2. A thin-film solar cell assembly for optimizing edge light utilization according to claim 1, characterized in that: The bypass diodes (7) on both sides are arranged on the same side of the battery layer (3) or alternately arranged on different sides of the battery layer (3).

3. The thin-film solar cell assembly for optimizing edge light utilization according to claim 1, characterized in that: The sub-battery (31) and the bypass diode (7) on the same surface are arranged with opposite polarities.

4. The thin-film solar cell assembly for optimizing edge light utilization according to claim 1, characterized in that: X=2.96, Y=4.

54.

5. The thin-film solar cell assembly for optimizing edge light utilization according to claim 1, characterized in that: The bypass diode (7) is configured to be in a strip or block shape.

Images