Novel TOPCon battery and assembly

Abstract

The utility model discloses a novel TOPCon battery which comprises a power generation unit and auxiliary grids arranged on the power generation unit, the auxiliary grids are connected through a current collecting assembly for current collection, current of the auxiliary grids 1 is collected, the auxiliary grids and the power generation unit are connected through aluminum paste so as to reduce cost, and compared with silver paste and the aluminum paste, the cost can be reduced, and the cost is reduced. The distance between the auxiliary grids is 1.0-2.0 mm so as to reduce the current transmission distance, the auxiliary grids 1 are connected by adopting aluminum paste, the resistance is increased, and the current transmission capability is improved by reducing the distance between the auxiliary grids 1, so that the cost is reduced, and the current transmission is also ensured. The auxiliary grids and the anti-reflection layer are connected through aluminum paste, cost is reduced, meanwhile, the distance between the auxiliary grids is shortened by half, current transmission is guaranteed, the auxiliary grids and the anti-reflection layer are matched, cost is reduced, and current transmission is the same as before.

Description

Technical Field

[0001] The utility model relates to the field of new TOPCon batteries, and specifically relates to a new TOPCon battery and component. Background Art

[0002] Photovoltaic components convert light energy into electrical energy. Among them, the sub-grid is required to collect the current, and then the main grid secondary aggregates the current of the sub-grid. The connection between the sub-grid and the power generation unit generally uses silver paste, which has good fixing effect and good conductivity. However, the price of silver paste is expensive, increasing the cost. Therefore, how to make the connection cost of the sub-grid lower is an urgent problem to be solved by those skilled in the art. Content of the Utility Model

[0003] The purpose of the utility model is to provide a new TOPCon battery and component to solve the problems put forward in the above background art.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A new TOPCon battery includes a power generation unit and sub-grids arranged on the power generation unit. The sub-grids are connected by a current collection component for current collection to aggregate the current of the sub-grids. The sub-grids and the power generation unit are connected by aluminum paste to reduce the cost. Compared with silver paste, aluminum paste can reduce the cost. The distance between the sub-grids is 1.0 - 2.0 mm to reduce the current transmission distance. The sub-grids are connected by aluminum paste, and the resistance increases. By reducing the distance between the sub-grids, the current transmission ability is improved. In this way, both the cost is reduced and the current transmission is ensured.

[0005] Preferably, the current collection component and the sub-grid are connected through a silver paste-containing layer. The silver paste ensures connection and current transmission.

[0006] Preferably, the silver paste-containing layer includes a silver paste layer on the upper side and an aluminum paste layer on the lower side. Two layers are adopted and used in combination.

[0007] Preferably, the aluminum paste layer is in contact with the sub-grid. The welding is firmer and the conductivity is also better.

[0008] Preferably, the distance between the sub-grids is 1.5 mm. Compared with the traditional 3 mm, the distance here is shortened by half, reducing the resistance and improving the transmission ability.

[0009] Preferably, the power generation unit includes upper and lower anti-reflection layers. A passivation layer, a P-type emitter, silicon carbide, an ultra-thin tunneling layer, and an n-type polysilicon thin film are sequentially arranged between the two anti-reflection layers. This is the prior art and can also be other existing structures.

[0010] Preferably, the current collection component is a solder strip, and current collection is realized through the solder strip without a main grid.

[0011] A component, including the above-mentioned novel TOPCon cell.

[0012] Preferably, it further includes a front adhesive film layer disposed on the novel TOPCon cell, an upper glass disposed on the front adhesive film layer, a back adhesive film layer disposed on the lower side of the novel TOPCon cell, and a cover plate disposed on the lower side of the back adhesive film layer.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] 1. The sub-grid and the anti-reflection layer are connected by aluminum paste, which reduces the cost. At the same time, the distance between the sub-grids is shortened by half, which also ensures current transmission. The combination of the two reduces the cost and the current transmission is the same as before.

[0015] 2. The solder ribbon and the sub-grid are connected by silver-aluminum paste, which has a lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present utility model;

[0017] Figure 2 It is a schematic connection diagram of the solder ribbon and the sub-grid of the present utility model;

[0018] Figure 3 It is a schematic structural diagram of the S area and the M area of the present utility model.

[0019] In the figure: 1. Sub-grid; 2. Anti-reflection layer; 3. Passivation layer; 4. P-type emitter; 5. Ultra-thin tunneling layer; 6. n-type polysilicon thin film; 7. Solder ribbon. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figures 1 to 2 , Figure 3Schematic diagram of the M region formed by the contact between the sub-grid and the power generation unit and the S region where the sub-grid contacts the solder strip. The present invention provides a technical solution for a new type of TOPCon battery and module: A new type of TOPCon battery includes a power generation unit and a sub-grid 1 disposed on the power generation unit. The power generation unit includes upper and lower anti-reflection layers 2. A passivation layer 3, a P-type emitter 4, silicon carbide, an ultra-thin tunneling layer 5, and an n-type polysilicon film 6 are sequentially disposed between the two anti-reflection layers 2. This is the prior art and can also be other existing structures. The sub-grids 1 are connected by a current collection assembly for current collection, and the current of the sub-grids 1 is collected. The sub-grid and the power generation unit are connected by aluminum paste to reduce costs. Compared with silver paste, aluminum paste can reduce costs. The distance between the sub-grids 1 is 1.0 - 2.0 mm to reduce the current transmission distance. The sub-grids 1 are connected by aluminum paste, resulting in an increased resistance. By reducing the distance between the sub-grids 1, the current transmission ability is improved. In this way, both the cost is reduced and the current transmission is ensured. The distance between the sub-grids 1 can be 1.5 mm. Compared with the traditional 3 mm, the distance is shortened by half, the resistance is reduced, and the transmission ability is improved.

[0022] The current collection assembly and the sub-grid 1 are connected through a silver paste layer. The silver paste ensures connection and current transmission. The current collection assembly is a solder strip 7, and current collection is achieved through the solder strip 7. There is no main grid.

[0023] In addition, the silver paste layer can also include an upper silver paste layer and a lower aluminum paste layer. Two layers are used and mixed. The aluminum paste layer contacts the sub-grid 1. The welding is more firm and the conductivity is also better.

[0024] A module includes the above-mentioned new type of TOPCon battery.

[0025] It further includes a front adhesive film layer disposed on the new type of TOPCon battery, an upper layer of glass disposed on the front adhesive film layer, a back adhesive film layer disposed on the lower side of the new type of TOPCon battery, and a cover plate disposed on the lower side of the back adhesive film layer.

[0026] Working principle: The sub-grid 1 and the anti-reflection layer 2 are connected by aluminum paste, which reduces the cost. At the same time, the distance between the sub-grids 1 is shortened by half, which also ensures current transmission. The two cooperate to reduce the cost and the current transmission is the same as before. The solder strip 7 and the sub-grid 1 are connected by silver-aluminum paste, which has a lower cost.

[0027] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel TOPCon battery, comprising a power generation unit and a sub-grid (1) arranged on the power generation unit, wherein the sub-grids (1) are connected by a current collection component for current collection, and is characterized in that: The auxiliary grid and the power generation unit are connected by aluminum paste to reduce costs, and the distance between the auxiliary grids (1) is 1.0 - 2.0 mm to reduce the current transmission distance.

2. The novel TOPCon battery according to claim 1, characterized in that: The current collecting component and the auxiliary grid (1) are connected through a silver paste-containing layer.

3. The novel TOPCon battery according to claim 2, wherein: The silver paste-containing layer includes a silver paste layer on the upper side and an aluminum paste layer on the lower side.

4. The novel TOPCon cell according to claim 3, wherein: The aluminum paste layer is in contact with the auxiliary grid (1).

5. The novel TOPCon battery according to claim 1, characterized in that: The distance between the auxiliary grids (1) is 1.5 mm.

6. The novel TOPCon battery according to claim 1, characterized in that: The power generation unit includes upper and lower anti-reflection layers (2), and a passivation layer (3), a P-type emitter (4), silicon carbide, an ultra-thin tunneling layer (5), and an n-type polysilicon thin film (6) are sequentially arranged between the two anti-reflection layers (2).

7. The novel TOPCon battery according to claim 1, characterized in that: The current collecting component is a solder strip (7).

8. A component, characterized in that, It includes the novel TOPCon battery according to any one of claims 1 - 7.

9. The component according to claim 8, wherein: It further includes a front adhesive film layer disposed on the novel TOPCon battery, an upper layer of glass disposed on the front adhesive film layer, a back adhesive film layer disposed on the lower side of the novel TOPCon battery, and a cover plate disposed on the lower side of the back adhesive film layer.

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