Back-contact solar cell, solar cell structure, and photovoltaic module

1 . A back-contact solar cell, comprising:

a solar cell body; and

a positive electrode and a negative electrode that are on a back surface of the solar cell body, wherein the positive electrode and the negative electrode each comprise:

a plurality of fingers extending along a first direction;

a plurality of busbars extending along a second direction; and

a connection electrode extending along the second direction,

wherein the plurality of fingers of the positive electrode and the plurality of fingers of the negative electrode are spaced apart and alternately arranged along the second direction, wherein at least one finger of the positive electrode is a continuous finger connected to the plurality of busbars of the positive electrode, and at least one finger of the negative electrode is a continuous finger connected to the plurality of busbars of the negative electrode,

wherein the plurality of busbars of the positive electrode and the plurality of busbars of the negative electrode are spaced apart and alternately arranged along the first direction, wherein each busbar is connected to a finger having a same polarity as that of the busbar, each busbar comprises a plurality of busbar sections distributed at intervals along the second direction, wherein each busbar section is separated from a respective finger having a polarity opposite to that of the busbar section by a gap between adjacent busbar sections, and

wherein the plurality of busbars of the positive electrode are located on a same side of the connection electrode of the positive electrode along the first direction, the plurality of busbars of the negative electrode are located on a same side of the connection electrode of the negative electrode along the first direction, and wherein the connection electrode of the positive electrode and the connection electrode of the negative electrode are each connected to fingers having the same polarity as that of the connection electrode and are insulated from fingers having the polarity opposite to that of the connection electrode.

2 . The back-contact solar cell according to claim 1 , wherein each continuous finger is connected to one or more busbars having the same polarity as that of the continuous finger.

3 . The back-contact solar cell according to claim 1 , wherein a continuous finger is not disrupted by gaps.

4 . The back-contact solar cell according to claim 1 , wherein a length of the gap between two adjacent busbar sections along the second direction ranges from 0.4 mm to 2 mm.

5 . The back-contact solar cell according to claim 1 , wherein the connection electrode is located at end portions of the plurality of fingers of the positive electrode and the plurality of fingers of the negative electrode, and

wherein heads and tails of the plurality of fingers of the positive electrode and the plurality of fingers of the negative electrode are respectively flush with each other.

6 . The back-contact solar cell according to claim 1 , wherein the plurality of busbars of the positive electrode and the plurality of busbars of the negative electrode are located between the connection electrode of the positive electrode and the connection electrode of the negative electrode.

7 . The back-contact solar cell according to claim 1 , wherein each finger is spaced from a connection electrode having a polarity opposite to that of the finger by a gap extending along the first direction.

8 . The back-contact solar cell according to claim 1 , wherein the plurality of busbar sections comprised in a busbar have a same length measured along the second direction and are distributed at equal intervals along the second direction.

9 . The back-contact solar cell according to claim 1 , wherein busbars having the same polarity each comprise a same quantity of busbar sections numbered in sequence, and

wherein busbar sections corresponding to a same number in busbars having the same polarity are flush with each other along the first direction, and

wherein busbar sections corresponding to a same number in busbars having opposite polarities are staggered along the second direction.

10 . The back-contact solar cell according to claim 1 , wherein the back-contact solar cell further comprises soldering portions, and each soldering portion is connected to a corresponding busbar having a same polarity as that of the soldering portion.

11 . The back-contact solar cell according to claim 10 , wherein the soldering portions comprise first-type soldering portions located between adjacent busbar sections of a same busbar,

wherein first-type fingers of the plurality of fingers of the positive electrode are located at a same position along the second direction as the first-type soldering portions, and

wherein each of the first-type fingers comprises a plurality of finger sections distributed at intervals along the first direction, wherein each first-type finger is separated from first-type soldering portions having a polarity opposite to that of the first-type finger by gaps between the finger sections.

12 . A photovoltaic module, comprising:

one or more back-contact solar cells, wherein a back-contact solar cell comprises:

a solar cell body; and

a positive electrode and a negative electrode that are on a back surface of the solar cell body, wherein the positive electrode and the negative electrode each comprise;

a plurality of fingers extending along a first direction;

a plurality of busbars extending along a second direction; and

a connection electrode extending along the second direction,

wherein the plurality of fingers of the positive electrode and the plurality of fingers of the negative electrode are spaced apart and alternately arranged along the second direction, wherein at least one finger of the positive electrode is a continuous electrode connected to the plurality of busbars of the positive electrode, and at least one finger of the negative electrode is a continuous finger connected to the plurality of busbars of the negative electrode,

wherein the plurality of busbars of the positive electrode and the plurality of busbars of the negative electrode are spaced apart and alternately arranged along the first direction, wherein each busbar is connected to a finger having a same polarity as that of the busbar, each busbar comprises a plurality of busbar sections distributed at intervals along the second direction, wherein each busbar section is separated from a respective finger having a polarity opposite to that of the busbar section by a gap between adjacent busbar sections, and

wherein the plurality of busbars of the positive electrode are located on a same side of the connection electrode of the positive electrode along the first direction, the plurality of busbars of the negative electrode are located on a same side of the connection electrode of the negative electrode along the first direction, and wherein the connection electrode of the positive electrode and the connection electrode of the negative electrode are each connected to fingers having the same polarity as that of the connection electrode and are insulated from fingers having the polarity opposite to that of the connection electrode.

13 . The back-contact solar cell of claim 1 , wherein at least one finger of the positive electrode is a continuous finger intersecting with the plurality of busbars of the positive electrode, and at least one finger of the negative electrode is a continuous finger intersecting with the plurality of busbars of the negative electrode.

14 . The photovoltaic module of claim 12 , wherein at least one finger of the positive electrode is a continuous finger intersecting with the plurality of busbars of the positive electrode, and at least one finger of the negative electrode is a continuous finger intersecting with the plurality of busbars of the negative electrode.