CN-224234079-U - Photovoltaic module

CN224234079UCN 224234079 UCN224234079 UCN 224234079UCN-224234079-U

Abstract

The utility model discloses a photovoltaic module which comprises a battery layer, a back plate and bus bars, wherein the back plate is positioned on one side of the battery layer, the battery layer comprises a plurality of battery unit groups which are arranged in series, the bus bars comprise a first bus bar and a third bus bar which are partially positioned on one side of the back plate facing the battery layer, and at least one second bus bar which is positioned on one side of the back plate facing the battery layer, the first bus bar and the second bus bar are respectively provided with a bending section which is bent towards the back plate and penetrates through the back plate, and the second bus bars are not provided with bending sections. According to the photovoltaic module, the first bus bar and the third bus bar which are respectively positioned at two sides of the battery layer comprise the bending sections which penetrate through the back plate and are used for being electrically connected with an external power supply, the second bus bar is not provided with the bending sections and does not need to penetrate through the back plate, the total length of the bus bars is shortened, and the production cost and the maintenance cost of the photovoltaic module are saved.

Inventors

LI ZUOWEI
ZHU ZHIJUAN
ZHU GUANGCHAO
WU YU
LIU LIBING

Assignees

宿迁阿特斯阳光能源科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250520

Claims (11)

1. A photovoltaic module, characterized in that the photovoltaic module comprises: the battery comprises a battery layer and a backboard positioned at one side of the battery layer, wherein the battery layer comprises a plurality of battery cell groups which are sequentially connected in series along a first direction, and each battery cell group comprises a plurality of battery pieces; The bus bars comprise a first bus bar and a third bus bar which are partially positioned on one side of the back plate towards the battery layer and at least one second bus bar which is totally positioned on one side of the back plate towards the battery layer, wherein the second bus bar is positioned between the first bus bar and the third bus bar, the first bus bar is electrically connected with a first battery unit group which is serially connected with the battery layer along a first direction, the third bus bar is electrically connected with a last battery unit group which is serially connected with the battery layer along the first direction, the second bus bar is electrically connected with two adjacent battery unit groups, the first bus bar is provided with a first bending section which is bent towards the back plate and penetrates through the back plate, and the third bus bar is provided with a third bending section which is bent towards the back plate and penetrates through the back plate.
2. The photovoltaic module of claim 1, wherein the first bus bar has a first straight line segment extending in a first direction, the first bent segment is located at an end of the first straight line segment near or far from the second bus bar, and/or, The third bus bar is provided with a third straight line section extending along the first direction, and the third bending section is positioned at one end of the third straight line section, which is close to or far from the second bus bar.
3. The photovoltaic module according to claim 1, wherein the back plate is provided with a first through hole and a second through hole, the first bending section penetrates through the first through hole, the size of the first through hole is larger than that of the first bending section, the third bending section penetrates through the second through hole, and the size of the second through hole is larger than that of the third bending section.
4. The photovoltaic module according to claim 3, wherein a difference L1 between a dimension of the first through hole in the first direction and a width of the first bending section satisfies 2 mm≤L1≤4mm, and/or, The difference L2 between the dimension of the second through hole along the first direction and the width of the third bending section is 2mm or less and L2 or less and 4mm or less.
5. The photovoltaic module of claim 1, further comprising a first junction box and a second junction box located on a side of the back plate away from the cell layer, respectively, the first bending section extending through the back plate and electrically connected to the first junction box, and the third bending section extending through the back plate and electrically connected to the second junction box.
6. The photovoltaic module of claim 5, wherein no diode is disposed within the first junction box and the second junction box.
7. The photovoltaic module of claim 1, further comprising a plurality of solder strips positioned on a side of the backsheet facing the cell layer, wherein a portion of the cells in the cell stack are connected in series by the solder strips, and wherein a portion of the cells in the cell stack are electrically connected to the bus bars by the solder strips.
8. The photovoltaic module of claim 7, wherein the cells in the battery cell stack are back contact cells, the back of the back contact cells being disposed toward the back plate, the solder strips being soldered to the back of the back contact cells.
9. The photovoltaic assembly of claim 7, wherein the battery cell stack comprises a first battery cell and a second battery cell, the first battery cell and the second battery cell being connected in parallel; The first battery unit comprises a first battery string and a second battery string which are arranged in parallel, the first battery string and the second battery string are connected in series, the second battery unit comprises a third battery string and a fourth battery string which are arranged in parallel, and the third battery string and the fourth battery string are connected in series; the first battery string, the second battery string, the third battery string and the fourth battery string all comprise a plurality of battery pieces which are connected in series, a plurality of welding strips are electrically connected with a plurality of battery pieces in the first battery string, the second battery string, the third battery string and the fourth battery string, and a plurality of welding strips extend along the string arrangement direction of the plurality of battery pieces and are parallel to each other.
10. The photovoltaic module according to claim 9, wherein for a first group of battery cells in which the battery layers are connected in series in a first direction, the first battery string and the third battery string are electrically connected to the first bus bar through the solder ribbon, the second battery string and the fourth battery string are electrically connected to a second bus bar adjacent to the first bus bar through the solder ribbon, and/or, For the last battery cell group in which the battery layers are connected in series in the first direction, the first battery string and the third battery string are electrically connected to a second bus bar adjacent to the third bus bar through the solder strip, the second battery string and the fourth battery string are electrically connected to the third bus bar through the solder strip, and/or, And for the battery cell groups between the first battery cell group and the last battery cell group of the battery layers which are connected in series along the first direction, the first battery string and the third battery string are electrically connected with the second bus bar through the welding strip, and the second battery string and the fourth battery string are electrically connected with the adjacent second bus bar through the welding strip.
11. The photovoltaic assembly of claim 9, wherein the bus bar further comprises a fourth bus bar and a fifth bus bar; the first battery string and the second battery string in the same first battery unit are connected with the fourth bus bar in series through the welding strip, and the third battery string and the fourth battery string in the same second battery unit are connected with the fifth bus bar in series through the welding strip.

Description

Photovoltaic module Technical Field The utility model belongs to the technical field of photovoltaics, and particularly relates to a photovoltaic module. Background The bus bar is a key conductive part in the photovoltaic module, and in the manufacturing process of the photovoltaic module, the bus bar is electrically connected with the battery pieces to collect the current generated by the single battery piece, a complete circuit is formed in a serial or parallel mode, and finally, the electric energy is transmitted to the output end of the photovoltaic module. The bus bar design in the existing photovoltaic module has the defects that the bus bar for the parallel battery string is required to be provided with bending sections, the bending sections penetrate through the backboard of the photovoltaic module and are electrically connected with external modules, each external module is required to be connected with the bending sections of the two bus bars, the total length of the bus bar is increased, and the production cost of the photovoltaic module is increased. Accordingly, in view of the above-mentioned technical problems, it is necessary to provide a photovoltaic module. Disclosure of utility model The utility model aims to provide a photovoltaic module, which can shorten the total length of bus bars and reduce the production cost and maintenance cost of the photovoltaic module. In order to achieve the above object, a specific embodiment of the present utility model provides the following technical solution: A photovoltaic module, the photovoltaic module comprising: the battery comprises a battery layer and a backboard positioned at one side of the battery layer, wherein the battery layer comprises a plurality of battery cell groups which are sequentially connected in series along a first direction, and each battery cell group comprises a plurality of battery pieces; The bus bars comprise a first bus bar and a third bus bar which are partially positioned on one side of the back plate towards the battery layer and at least one second bus bar which is totally positioned on one side of the back plate towards the battery layer, wherein the second bus bar is positioned between the first bus bar and the third bus bar, the first bus bar is electrically connected with a first battery unit group which is serially connected with the battery layer along a first direction, the third bus bar is electrically connected with a last battery unit group which is serially connected with the battery layer along the first direction, the second bus bar is electrically connected with two adjacent battery unit groups, the first bus bar is provided with a first bending section which is bent towards the back plate and penetrates through the back plate, and the third bus bar is provided with a third bending section which is bent towards the back plate and penetrates through the back plate. In one or more embodiments of the utility model, the first bus bar has a first straight line segment extending in a first direction, the first bent segment being located at an end of the first straight line segment that is closer to or farther from the second bus bar, and/or, The third bus bar is provided with a third straight line section extending along the first direction, and the third bending section is positioned at one end of the third straight line section, which is close to or far from the second bus bar. In one or more embodiments of the present utility model, a first through hole and a second through hole are formed in the back plate in a penetrating manner, the first bending section penetrates through the first through hole, the size of the first through hole is larger than that of the first bending section, the third bending section penetrates through the second through hole, and the size of the second through hole is larger than that of the third bending section. In one or more embodiments of the present utility model, a difference L1 between a dimension of the first through hole in the first direction and a width of the first bending section satisfies 2mm < L1 > 4mm, and/or a difference L2 between a dimension of the second through hole in the first direction and a width of the third bending section satisfies 2mm < L2 > 4mm. In one or more embodiments of the present utility model, the photovoltaic module further includes a first junction box and a second junction box respectively located at a side of the back plate away from the battery layer, the first bending section penetrates through the back plate to be electrically connected with the first junction box, and the third bending section penetrates through the back plate to be electrically connected with the second junction box. In one or more embodiments of the utility model, no diode is disposed within the first and second junction boxes. In one or more embodiments of the present utility model, the photovoltaic module further includes a plurality of solder strips located on a sid