CN219832673U

CN219832673U - Perovskite group battery and group cluster of adjustable series resistance

Info

Publication number: CN219832673U
Application number: CN202320318614.9U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Renshuo Solar Energy Suzhou Co ltd
Current assignee: Renshuo Solar Energy Suzhou Co ltd
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-10-13
Anticipated expiration: 2033-02-27

Abstract

The utility model discloses a perovskite battery pack and a perovskite battery pack string with adjustable series resistance, which comprise a first battery and a second battery, wherein a first bus bar is laid on the negative electrode of the first battery, a second bus bar is laid on the positive electrode of the second battery, a third bus bar is arranged between the first battery and the second battery, one end of the third bus bar is connected with the first bus bar, and the other end of the third bus bar is connected with the second bus bar, so that the battery pack connected with the first battery and the second battery is formed. Compared with the original connection mode, the I-shaped connection adopted by the utility model reduces a great amount of connection redundancy, greatly reduces the use amount of metal connection materials and reduces the manufacturing cost of the assembly.

Description

Perovskite group battery and group cluster of adjustable series resistance

Technical Field

The utility model belongs to the technical field of solar cells, and particularly relates to a perovskite battery pack with an adjustable series resistance.

Background

At present, the perovskite large-area preparation technology is not mature, but the specification of photovoltaic materials on the market is mostly the adaptation material of large-area components, because the large-area components have lower BOS cost and lower LCOE cost, and if the perovskite technology hopes to utilize the mature large-area photovoltaic component primary and secondary materials, the perovskite component area needs to be enlarged urgently.

At present, the stability and the efficiency of the small-area perovskite assembly are basically mature, and in order to achieve the purpose of enlarging the area of the perovskite assembly, the small-area assembly can be spliced into a large-area perovskite assembly so as to reduce the assembly cost by utilizing mature upstream and downstream materials, so that the competitiveness of a perovskite technical route is enhanced. However, the splicing process involves a large number of components connected in series and parallel, wherein the series resistance is related to the size of the contact area. At present, most companies producing perovskite series bus bars are foreign companies, the specifications of the companies are fixed, and the cost for customizing and opening the die is high.

As shown in fig. 1, in the conventional connection method, the anode and the cathode are directly connected, a large amount of bus metal is covered on the edge cleaning area, a large amount of connection redundancy exists, and a large amount of connection materials are wasted.

Therefore, there is an urgent need to develop a series scheme of large-area adjustable series resistance based on the existing raw material system to prepare a large-area perovskite photovoltaic module.

Disclosure of Invention

The utility model aims to provide a perovskite battery pack with adjustable series resistance.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a perovskite group battery of adjustable series resistance, includes first battery and second battery the negative pole of first battery lays first busbar the positive pole of second battery lays the second busbar set up the third busbar between first battery with the second battery, third busbar one end is connected first busbar, the second busbar is connected to the other end, forms the group battery of connecting first battery and second battery, wherein the third busbar can be followed its center and is rotated at the plane that first busbar and second busbar formed.

Further, the material of the first bus bar is one of copper, silver or copper-clad silver.

Further, the second bus bar is made of one of copper, silver or copper-clad silver.

Further, the third bus bar is made of one of copper, silver or copper-clad silver.

Further, the third bus bar is connected to the first bus bar and the second bus bar in a manner selected from any one of welding, bonding, or ohmic contact connection.

Further, the dimensions of the first, second and third bus bars are all: the width is 2mm-20mm, and the thickness is 0.1-1mm.

Further, the first battery and/or the second battery is a back contact thin film battery.

A perovskite battery string with adjustable series resistance comprises a plurality of perovskite battery strings.

Advantageous effects

1. The small-piece thin film battery is not commercially available due to low power and higher LCOE cost, and the small-piece thin film battery is spliced into a high-power large-area component by adopting the I-shaped connection, so that the small-piece thin film battery has the possibility of commercial use, particularly the photovoltaic component which cannot be prepared in a large area at the current stage by using the spin coating technology such as perovskite;

2. compared with the original connection mode, the I-shaped connection adopted by the utility model reduces a great amount of connection redundancy, greatly reduces the use amount of metal connection materials and reduces the manufacturing cost of the assembly;

3. the method for adjusting the connecting resistance by changing the contact area through rotation is adopted, so that the connecting resistance has more selectivity, and a designer can control the series resistance of the battery within a reasonable range by using conventional materials through the method;

4. the utility model has wide adaptability to the back contact battery;

5. according to the utility model, more main grid batteries only have 1 main grid, so that the complexity of connecting equipment is reduced.

Drawings

Fig. 1 is a schematic diagram of a connection mode in which positive and negative electrodes are directly connected.

Fig. 2 is a schematic diagram of the connection of perovskite battery of the utility model.

Fig. 3 is a schematic diagram showing the connection manner of the perovskite battery pack in example 1.

Fig. 4 is a schematic diagram showing the connection of perovskite battery strings in example 2.

Fig. 5 is a schematic diagram showing the connection of perovskite battery strings in example 3.

Wherein: 1 is a first cell, 11 is a first bus bar, 2 is a second cell, 21 is a second bus bar, and 3 is a third bus bar.

Description of the embodiments

The utility model will now be described in further detail with reference to the drawings and specific examples, which should not be construed as limiting the utility model.

Example 1

The embodiment provides an I-shaped connection scheme for realizing large-area adjustable series resistance.

As shown in fig. 2, a first bus bar 11 is laid on the negative electrode of the first battery 1, a second bus bar 21 is laid on the positive electrode of the second battery 2, a third bus bar 3 is provided between the first battery 1 and the second battery 2, one end of the third bus bar 3 is connected to the first bus bar 11, and the other end is connected to the second bus bar 21, so that a battery pack is formed, which connects the first battery 1 and the second battery 2.

The first bus bar 11 and the second bus bar 21 are made of copper, silver or copper-clad silver. The third bus bar 3 is made of one of copper, silver or copper-clad silver.

The width of the first bus bar 11, the second bus bar 21 and the third bus bar 3 is 2mm-20mm, and the thickness is 0.1-1mm.

As shown in fig. 3, the third bus bar 3 is rotatable along a plane whose center is formed by the first bus bar 11 and the second bus bar 21. Rotating the third bus bar 3 by a certain angle along its center increases the contact area of the third bus bar 3 with the first bus bar 11 and the second bus bar 21, thereby reducing the series resistance; the angle is determined according to the short-circuit current of the film battery, and the larger the short-circuit current is, the larger the corresponding rotation angle is.

Example 2

As shown in fig. 4, the battery pieces are transversely connected in the manner of embodiment 1, in this embodiment, 2 pieces are connected, or a plurality of pieces are connected, each string is called a group string, then a plurality of groups of strings are connected in parallel, and a large-area film assembly is obtained after the bus bar is used for drainage.

The battery pieces to be spliced are connected by using the method, and a large amount of connecting materials, especially materials of the edge cleaning area, can be saved compared with the traditional redundant connection at the same time.

The cell is preferably a perovskite cell including, but not limited to, a back contact thin film cell of cadmium telluride, copper indium gallium selenide, and the like.

Example 3

As shown in fig. 5, the battery pieces are longitudinally connected in the manner of embodiment 1, wherein the connection can be 2 pieces or multiple pieces, each series connection is called a group series, then the group series connection is performed on the group series connection, a large-area film assembly is obtained after the bus bar drainage, and the bus bar drainage method comprises welding, bonding and physical ohmic contact.

Claims

1. A perovskite battery of adjustable series resistance, characterized in that: including first battery (1) and second battery (2) lay first busbar (11) in the negative pole of first battery (1) lay second busbar (21) in the positive pole of second battery (2) set up third busbar (3) between first battery (1) with second battery (2), third busbar (3) one end is connected first busbar (11), and second busbar (21) are connected to the other end, form the group battery of connecting first battery (1) and second battery (2).

2. The perovskite battery of adjustable series resistance as claimed in claim 1, wherein: the third bus bar (3) is rotatable along a plane formed at the center thereof at the first bus bar (11) and the second bus bar (21).

3. The perovskite battery of adjustable series resistance as claimed in claim 1, wherein: the first bus bar (11) is made of one of copper, silver or copper-clad silver.

4. The perovskite battery of adjustable series resistance as claimed in claim 1, wherein: the second bus bar (21) is made of one of copper, silver or copper-clad silver.

5. The perovskite battery of adjustable series resistance as claimed in claim 1, wherein: the third bus bar (3) is made of one of copper, silver or copper-clad silver.

6. The perovskite battery of adjustable series resistance as claimed in claim 1, wherein: the third bus bar (3) is connected with the first bus bar (11) and the second bus bar (21) by any one of welding, bonding or ohmic contact connection.

7. The perovskite battery of adjustable series resistance as claimed in claim 1, wherein: the dimensions of the first bus bar (11), the second bus bar (21) and the third bus bar (3) are all: the width is 2mm-20mm, and the thickness is 0.1-1mm.

8. The perovskite battery of adjustable series resistance as claimed in claim 1, wherein: the first cell (1) and/or the second cell (2) are back contact thin film cells.

9. A perovskite group battery cluster of adjustable series resistance, its characterized in that: a perovskite battery comprising a plurality of claim 1.