CN-122028519-A - Photovoltaic module

Abstract

The application provides a photovoltaic module, each string group comprises a plurality of parallel battery strings, the plurality of string groups are connected in series, each string group comprises at least one middle string group and two end string groups positioned at two ends of the plurality of string groups, at least part of adjacent string groups are connected in series through a first bus piece, at least one second bus piece is arranged at the end of each end string group, a first electric connecting piece is electrically connected to at least one middle string group, and the first electric connecting piece is electrically connected with the two second bus pieces. The current of the middle string group can be directly guided to the two ends of the photovoltaic module through the first electric connecting piece, so that the trend of the whole circuit is optimized, and the complicated circuit design of the long jumper wire or a plurality of jumper wires can be replaced by only adopting one short first electric connecting piece (such as a jumper wire). The cost saved by the first electric connector can be directly reduced in cost, and the production process can be effectively simplified and the cost of the process part is reduced because of the reduction of the number of the first electric connectors.

Inventors

• PENG YINGYING
• LEI YAFEI

Assignees

• 晶科能源(海宁)有限公司

Dates

Publication Date

20260512

Application Date

20260403

Claims (10)

1. 1. A photovoltaic module, characterized in that the photovoltaic module comprises: The device comprises a plurality of string groups, a plurality of battery strings and a plurality of battery strings, wherein each string group comprises a plurality of battery strings connected in parallel, and the plurality of battery strings are connected in series; a first bus member through which at least part of adjacent string groups are connected in series; The ends of the two end serial groups are respectively provided with at least one second confluence piece; the first electric connecting piece is electrically connected to at least one middle string group, and the first electric connecting piece is electrically connected with the two second bus pieces.
2. 2. The photovoltaic module according to claim 1, wherein the number of the string groups is configured to be three, the three string groups include one of the middle string group and two of the end string groups, the middle string group and the two of the end string groups are each connected in series by the first bus bar, and/or, The photovoltaic module comprises a plurality of diodes, and the first electric connecting piece is connected with the two second bus pieces through the diodes.
3. 3. The photovoltaic module of claim 2, wherein the cell strings of the middle string set have a length L1 and the cell strings of the two end string sets have lengths L2 and L3, respectively, wherein L1 is greater than or equal to (l2+l3).
4. 4. The photovoltaic module according to claim 3, wherein lengths L2 and L3 of the cell strings of the two end strings are the same, or The lengths L2 and L3 of the battery strings of the two end string groups are different.
5. 5. The photovoltaic assembly of claim 2, wherein the first electrical connector is connected at both ends to a first separation location and a second separation location of the intermediate string; the number of battery strings of the middle string group is the same as that of the battery strings of the end string group, the number of battery pieces of the battery strings of the middle string group is N1, the number of battery pieces positioned between the first separation position and the second separation position in the battery strings of the middle string group is Nn, and the number of battery pieces of the battery strings of the end string group is N2, wherein (N1-Nn) = (N2+Nn).
6. 6. The photovoltaic assembly of claim 2, wherein the plurality of diodes includes a first diode, a second diode, and a third diode; The first diode is arranged on the first electric connecting piece, the second diode is arranged on one second converging piece, the third diode is arranged on the other second converging piece, and two ends of the first diode are respectively connected with one end of the second diode and one end of the third diode.
7. 7. The photovoltaic module according to claim 1, wherein the extending reference lines of the plurality of cell strings in the plurality of string groups are parallel to each other, and/or, The extending datum lines of the first and second bus members are parallel to each other, and the distance H between the first and second bus members is between 60mm and 80mm, and/or, The length of the first confluence piece is greater than or equal to twice the length of the second confluence piece.
8. 8. The photovoltaic module of claim 2, wherein the photovoltaic module comprises: and the junction box is provided with a plurality of diodes which are assembled in the same junction box.
9. 9. The photovoltaic module of claim 2, wherein the first buss member is located on a cell backlight side of the cell string.
10. 10. The photovoltaic module of claim 9, wherein the cell strings include a second electrical connector through which a plurality of cells in the cell string are connected in series, and wherein second electrical connector ends of adjacent cell strings in the string set are connected by the first bus bar and are located on a backlight surface of the cells.

Description

Photovoltaic module Technical Field The application relates to the technical field of photovoltaics, in particular to a photovoltaic module. Background The photovoltaic module can convert light energy into electric energy through the photovoltaic effect of the battery pieces, and then the plurality of battery pieces are connected in series through the bus bars, so that the electric energy generated by the battery pieces is collected by the bus bars and then is led out. In addition, as the size of the battery cells increases, the current within the individual strings is greater, resulting in greater power loss of the photovoltaic module. Therefore, the photovoltaic module gradually adopts multiple fragments, so that the overall power of the photovoltaic module is improved, the power loss is reduced, and the multiple battery strings are designed into various feasible arrangement schemes through the matching of the bus bars and the jumper wires. The use of multiple bus bars and multiple jumpers can undoubtedly increase costs. Therefore, how to ensure the whole power and reasonably optimize the arrangement scheme, and reduce the cost becomes a technical problem to be solved in the field. Disclosure of Invention Based on this, it is necessary to provide a photovoltaic module aiming at the technical problems mentioned above. The application provides a photovoltaic module, comprising: The device comprises a plurality of string groups, a plurality of battery strings and a plurality of battery strings, wherein each string group comprises a plurality of battery strings connected in parallel, and the plurality of battery strings are connected in series; a first bus member through which at least part of adjacent string groups are connected in series; The ends of the two end serial groups are respectively provided with at least one second confluence piece; the first electric connecting piece is electrically connected to at least one middle string group, and the first electric connecting piece is electrically connected with the two second bus pieces. In one embodiment, the number of the string groups is configured to be three, the three string groups include one middle string group and two end string groups, the middle string group and the two end string groups are connected in series through the first bus bar, and/or, The photovoltaic module comprises a plurality of diodes, and the first electric connecting piece is connected with the two second bus pieces through the diodes. In one embodiment, the lengths of the battery strings of the middle string set are L1, and the lengths of the battery strings of the two end string sets are L2 and L3, respectively, wherein L1 is greater than or equal to (l2+l3). In one embodiment, the lengths L2 and L3 of the battery strings of the two end string groups are the same, or The lengths L2 and L3 of the battery strings of the two end string groups are different. In one embodiment, two ends of the first electrical connector are connected to a first separation position and a second separation position of the intermediate string set; the number of battery strings of the middle string group is the same as that of the battery strings of the end string group, the number of battery pieces of the battery strings of the middle string group is N1, the number of battery pieces positioned between the first separation position and the second separation position in the battery strings of the middle string group is Nn, and the number of battery pieces of the battery strings of the end string group is N2, wherein (N1-Nn) = (N2+Nn). In one embodiment, the plurality of diodes includes a first diode, a second diode, and a third diode; The first diode is arranged on the first electric connecting piece, the second diode is arranged on one second converging piece, the third diode is arranged on the other second converging piece, and two ends of the first diode are respectively connected with one end of the second diode and one end of the third diode. In one embodiment, the extending reference lines of the battery strings in the string groups are parallel to each other, and/or, The extending datum lines of the first and second bus members are parallel to each other, and the distance H between the first and second bus members is between 60mm and 80mm, and/or, The length of the first confluence piece is greater than or equal to twice the length of the second confluence piece. In one embodiment, the photovoltaic module comprises: and the junction box is provided with a plurality of diodes which are assembled in the same junction box. In one embodiment, the first bus bar is located on a backlight surface of the battery cells of the battery string. In one embodiment, the battery strings include second electrical connectors, the plurality of battery pieces in the battery strings are connected in series through the second electrical connectors, and the ends of the second electrical connectors of the battery strings