Novel TOPCon solar cell
By designing explosion-proof mechanisms in the new TOPCon solar cells, including insulating layer, explosion-proof components and flame-retardant layers, the problem of the existing TOPCon solar cells lacking explosion-proof functions during long-term use is solved, significantly improving the explosion-proof performance of the battery and reducing safety hazards.
Patent Information
- Application Number
- CN202421106790.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-05-21
AI Technical Summary
The existing new TOPCon solar cells do not have good explosion-proof functions when used for a long time, resulting in greater safety risks.
A new TOPCon solar cell was designed with an explosion-proof mechanism, including an insulating layer, an explosion-proof component and a flame-retardant layer. The internal reinforcement ribs are arranged horizontally interlaced with each other. The flame retardant layer is made of rock wool material and the insulating layer is made of polyethylene. The protective effect is achieved through the design of the battery cover body and the electrode body.
Through the design of reinforcement ribs and explosion-proof boards, the firm performance of explosion-proof components is improved. The material selection of the insulation layer and flame-retardant layer improves the insulation and flame-retardant effect of the explosion-proof mechanism, thereby significantly improving the explosion-proof performance of the new TOPCon solar cell and reducing safety hazards.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of TOPCon solar cells, in particular to a novel TOPCon solar cell. Background Art
[0002] TOPCon is a solar cell with tunneling oxide passivation contact based on the principle of selective carriers. Its cell structure is an N-type silicon substrate cell. An ultra-thin silicon oxide layer is prepared on the back of the cell, and then a thin layer of doped silicon is deposited. The two together form a passivation contact structure, which effectively reduces surface recombination and metal contact recombination, and provides more room for further improvement of N-PERT cell conversion efficiency. TOPCon cells retain and utilize the existing traditional P-type cell equipment process to the greatest extent. Only boron diffusion and thin film deposition equipment need to be added. There is no need for back opening and alignment, which greatly simplifies the cell production process, has low production difficulty, and has high compatibility with process equipment production lines. It can be prepared at high temperature with PERC and N-PERT bifacial cells, which greatly simplifies the cell production process, and has low production difficulty.
[0003] The currently available new TOPCon solar cells do not have good explosion-proof functions when used for a long time, which makes the safety risks of the new TOPCon solar cells lower. Utility Model Content
[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.
[0005] In view of the fact that the currently existing new TOPCon solar cells do not have a good explosion-proof function when used for a long time, so that the safety hazards of the new TOPCon solar cells are relatively low, the present utility model is proposed.
[0006] Therefore, the purpose of the utility model is to provide a novel TOPCon solar cell.
[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: A new TOPCon solar cell includes a TOPCon solar cell mechanism, which includes an explosion-proof mechanism, the explosion-proof mechanism is installed on the TOPCon solar cell mechanism, a battery cover body is installed on the top of the explosion-proof mechanism, and an electrode body is installed on the top of the battery cover body;
[0008] A TOPCon solar cell assembly comprises a first anti-reflection film, a purification layer is arranged on the top of the first anti-reflection film, a P-type emitter is arranged on the top of the purification layer, a first oxide film layer is arranged on the top of the P-type emitter, an N-type silicon wafer substrate is arranged on the top of the first oxide film layer, an ultra-thin tunneling layer is arranged on the bottom of the first anti-reflection film, an N-type polysilicon film is arranged on the bottom of the ultra-thin tunneling layer, a second oxide film layer is arranged on the bottom of the N-type polysilicon film, and a second anti-reflection film is arranged on the bottom of the second oxide film layer.
[0009] As a preferred solution of a new TOPCon solar cell of the utility model, the explosion-proof mechanism includes an insulating layer, an explosion-proof component and a flame-retardant layer, the insulating layer is installed on the inner wall of the explosion-proof mechanism, an explosion-proof component is installed at one end of the insulating layer, and the outer wall of the explosion-proof component is provided with a flame-retardant layer.
[0010] By adopting the above technical solution, the flame retardant effect of the explosion-proof mechanism is better by arranging a flame retardant layer on the outer wall of the explosion-proof component, and the thickness of the flame retardant layer is 0.3cm-0.7cm.
[0011] As a preferred solution of the utility model for a new type of TOPCon solar cell, the explosion-proof component includes explosion-proof panels, which are installed in a transverse arrangement inside the explosion-proof component, and reinforcing ribs are installed in a transversely staggered arrangement inside the explosion-proof component.
[0012] By adopting the above technical solution, the present solution installs reinforcing ribs in a transversely staggered arrangement inside the explosion-proof component, and through the design of the explosion-proof plate, the explosion-proof effect of the explosion-proof mechanism is improved through the reinforcing ribs and the explosion-proof plate.
[0013] As a preferred solution of the novel TOPCon solar cell of the utility model, the material of the flame retardant layer is rock wool material.
[0014] By adopting the above technical solution, the material of the flame retardant layer is rock wool material, and the flame retardant layer is designed to make the flame retardant effect of the explosion-proof mechanism better.
[0015] As a preferred solution of the novel TOPCon solar cell of the utility model, the material of the insulating layer is polyethylene, and the thickness of the insulating layer is 0.5 cm-0.7 cm.
[0016] By adopting the above technical solution, the material of the insulating layer is polyethylene, so that the insulating effect of the insulating layer on the explosion-proof mechanism is better.
[0017] As a preferred solution of the novel TOPCon solar cell of the utility model, the first oxide film layer and the second oxide film layer have the same structure.
[0018] By adopting the above technical solution, through the design of the first oxide film layer and the second oxide film layer, and by using a tubular furnace for annealing, introducing oxygen and nitrogen as reaction gases, and controlling the reaction temperature to °660C, an oxide film layer with a thickness of nm is formed on the back, thereby achieving a better effect.
[0019] As a preferred solution of the novel TOPCon solar cell of the utility model, the shape of the explosion-proof plate is an isosceles trapezoid, and the thickness of the explosion-proof plate is 0.4 cm-0.6 cm.
[0020] By adopting the above technical solution, the shape of the explosion-proof plate is an isosceles trapezoid, and the explosion-proof plate is designed, so that the explosion-proof effect of the explosion-proof mechanism is better.
[0021] A new type of TOPCon solar cell of the utility model has beneficial effects: firstly, the explosion-proof plate of the utility model is shaped as an isosceles trapezoid, and the reinforcing ribs are arranged transversely and staggered inside the explosion-proof component, so that the reinforcement ribs and the explosion-proof plate can make the explosion-proof component more firm, so that the explosion-proof mechanism has good explosion-proof performance, and at the same time, the insulating layer is made of polyethylene, so that the explosion-proof mechanism has good insulation effect through the insulating layer, and at the same time, the flame-retardant layer is made of rock wool material, so that the explosion-proof mechanism has good flame-retardant effect.
[0022] A new type of TOPCon solar cell of the utility model has beneficial effects: the utility model firstly designs a first oxide film layer and a second oxide film layer, and introduces oxygen and nitrogen as reaction gases through the first oxide film layer and the second oxide film layer, and controls the reaction temperature to °C, so that a first oxide film layer and a second oxide film layer with a thickness of nm are formed on the back side to replace the traditional silicon nitride film layer, which can effectively reduce the lateral transfer resistance. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:
[0024] Figure 1 This is a schematic diagram of the main structure of a new TOPCon solar cell.
[0025] Figure 2 Schematic diagram of the battery cover main assembly structure of a new TOPCon solar cell.
[0026] Figure 3 Schematic diagram of the internal structure of an explosion-proof component of a new TOPCon solar cell.
[0027] Figure 4 Schematic diagram of the explosion-proof component structure of a new TOPCon solar cell.
[0028] Figure 5 Schematic diagram of the structure of a TOPCon solar cell module of a new type of TOPCon solar cell.
[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0030] 1. TOPCon solar cell mechanism; 101. explosion-proof mechanism; 1011. insulation layer; 1012. explosion-proof assembly; 10121. explosion-proof plate; 10122. reinforcing ribs; 1013. flame retardant layer; 102. battery cover body; 103. electrode body;
[0031] 2. TOPCon solar cell module; 201. first anti-reflection film; 202. purification layer; 203. P-type emitter; 204. first oxide film layer; 205. N-type silicon wafer substrate; 206. ultra-thin tunneling layer; 207. N-type polysilicon thin film; 208. second oxide film layer; 209. second anti-reflection film. DETAILED DESCRIPTION
[0032] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.
[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.
[0035] Example 1: Reference Figures 1 to 5, which is the first embodiment of the utility model, and this embodiment provides a new TOPCon solar cell, which can solve the problem that the existing new TOPCon solar cell does not have a good explosion-proof function when used for a long time, thereby reducing the safety hazard of the new TOPCon solar cell, including a TOPCon solar cell mechanism 1, which includes an explosion-proof mechanism 101, and the explosion-proof mechanism 101 is installed on the TOPCon solar cell mechanism 1, and a battery cover body 102 is installed on the top of the explosion-proof mechanism 101, and an electrode body 103 is installed on the top of the battery cover body 102, and through the design of the battery cover body 102, the battery cover body 102 can start the protection effect on the TOPCon solar cell mechanism 1.
[0036] A TOPCon solar cell assembly 2 comprises a first anti-reflection film 201, a top of the first anti-reflection film 201 is provided with a purification layer 202, a top of the purification layer 202 is provided with a P-type emitter 203, a top of the P-type emitter 203 is provided with a first oxide film layer 204, a top of the first oxide film layer 204 is provided with an N-type silicon wafer substrate 205, a bottom of the first anti-reflection film 201 is provided with an ultra-thin tunneling layer 206, and a bottom of the ultra-thin tunneling layer 206 is provided with an N-type polycrystalline silicon substrate. Thin film 207, a second oxide film layer 208 is provided at the bottom end of the N-type polysilicon thin film 207, and a second anti-reflection film 209 is provided at the bottom end of the second oxide film layer 208, the first oxide film layer 204 and the second oxide film layer 208 have the same structure, and are annealed in a tubular furnace, oxygen and nitrogen are introduced as reaction gases, and the reaction temperature is controlled to be 660°C, and an oxide film layer 7 with a thickness of 6nm is formed on the back to replace the traditional silicon nitride film layer, which can effectively reduce the lateral transmission resistance.
[0037] The specific working principle is that firstly, through the design of the first oxide film layer 204 and the second oxide film layer 208, oxygen and nitrogen are introduced as reaction gases through the first oxide film layer 204 and the second oxide film layer 208, and the reaction temperature is controlled to be 660°C, so that the first oxide film layer 204 and the second oxide film layer 208 with a thickness of 6 nm are formed on the back side to replace the traditional silicon nitride film layer, which can effectively reduce the lateral transfer resistance.
[0038] Example 2: Reference Figures 1 to 5, which is the first embodiment of the utility model, and this embodiment provides a new TOPCon solar cell, which can solve the problem that the existing new TOPCon solar cell does not have a good explosion-proof function when used for a long time, thereby reducing the safety hazard of the new TOPCon solar cell. The explosion-proof mechanism 101 includes an insulating layer 1011, an explosion-proof component 1012 and a flame retardant layer 1013. The insulating layer 1011 is installed on the inner wall of the explosion-proof mechanism 101, and the explosion-proof component 1012 is installed at one end of the insulating layer 1011, and the explosion-proof component 1012 is installed at one end of the explosion-proof component 1012. The outer wall of the explosion-proof component 1012 is provided with a flame-retardant layer 1013. The explosion-proof component 1012 includes an explosion-proof plate 10121. The explosion-proof plate 10121 is installed in a horizontal arrangement inside the explosion-proof component 1012. The interior of the explosion-proof component 1012 is installed with reinforcing ribs 10122 in a horizontally staggered arrangement. The interior of the reinforcing ribs 10122 is arranged in a horizontally staggered arrangement inside the explosion-proof component 1012, and through the design of the explosion-proof plate 10121 and the reinforcing ribs 10122, the explosion-proof mechanism 101 has good explosion-proof performance.
[0039] The flame retardant layer 1013 is made of rock wool, the insulating layer 1011 is made of polyethylene, and the thickness of the insulating layer 1011 is 0.5cm-0.7cm. The explosion-proof plate 10121 is in the shape of an isosceles trapezoid, and the thickness of the explosion-proof plate 10121 is 0.4cm-0.6cm. The insulating layer 1011 is made of polyethylene, so that the explosion-proof mechanism 101 has a good insulation effect through the insulating layer 1011. At the same time, the flame retardant layer 1013 is made of rock wool, so that the explosion-proof mechanism 101 has a good flame retardant effect.
[0040] The specific working principle is that, first, the shape of the explosion-proof plate 10121 is an isosceles trapezoid, and the interior of the reinforcement ribs 10122 are arranged in a transverse staggered manner inside the explosion-proof component 1012, so that the reinforcement ribs 10122 and the explosion-proof plate 10121 can make the explosion-proof component 1012 more firm, so that the explosion-proof mechanism 101 has good explosion-proof performance, and at the same time, the material of the insulating layer 1011 is polyethylene, so that the explosion-proof mechanism 101 has a good insulation effect through the insulating layer 1011, and at the same time, the material of the flame-retardant layer 1013 is rock wool material, so that the explosion-proof mechanism 101 has a good flame-retardant effect.
[0041] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A new type of TOPCon solar cell, characterized by: include, A TOPCon solar cell mechanism (1), comprising an explosion-proof mechanism (101), wherein the explosion-proof mechanism (101) is installed on the TOPCon solar cell mechanism (1), a battery cover body (102) is installed on the top of the explosion-proof mechanism (101), and an electrode body (103) is installed on the top of the battery cover body (102); A TOPCon solar cell assembly (2) comprises a first anti-reflection film (201); a purification layer (202) is arranged on the top of the first anti-reflection film (201); a P-type emitter (203) is arranged on the top of the purification layer (202); a first oxide film layer (204) is arranged on the top of the P-type emitter (203); an N-type silicon wafer substrate (205) is arranged on the top of the first oxide film layer (204); an ultra-thin tunneling layer (206) is arranged on the bottom of the first anti-reflection film (201); an N-type polysilicon film (207) is arranged on the bottom of the ultra-thin tunneling layer (206); a second oxide film layer (208) is arranged on the bottom of the N-type polysilicon film (207); and a second anti-reflection film (209) is arranged on the bottom of the second oxide film layer (208).
2. A novel TOPCon solar cell according to claim 1, characterized in that: The explosion-proof mechanism (101) comprises an insulating layer (1011), an explosion-proof component (1012) and a flame-retardant layer (1013); the insulating layer (1011) is installed on the inner wall of the explosion-proof mechanism (101), an explosion-proof component (1012) is installed on one end of the insulating layer (1011), and the outer wall of the explosion-proof component (1012) is provided with a flame-retardant layer (1013).
3. A novel TOPCon solar cell according to claim 2, characterized in that: The explosion-proof component (1012) comprises an explosion-proof plate (10121), wherein the explosion-proof plate (10121) is installed in a transverse arrangement inside the explosion-proof component (1012), and reinforcing ribs (10122) are installed in a transversely staggered arrangement inside the explosion-proof component (1012).
4. A novel TOPCon solar cell according to claim 2, characterized in that: The flame retardant layer (1013) is made of rock wool material.
5. A novel TOPCon solar cell according to claim 2, characterized in that: The material of the insulating layer (1011) is polyethylene, and the thickness of the insulating layer (1011) is 0.5 cm-0.7 cm.
6. A novel TOPCon solar cell according to claim 1, characterized in that: The first oxide film layer (204) and the second oxide film layer (208) have the same structure.
7. A novel TOPCon solar cell according to claim 3, characterized in that: The shape of the explosion-proof plate (10121) is an isosceles trapezoid, and the thickness of the explosion-proof plate (10121) is 0.4 cm-0.6 cm.