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Solar cell piece

A technology for solar cells and busbar electrodes, applied in the field of solar cells, can solve problems such as cracks and virtual welding of electrode grid lines, so as to reduce the probability of cracks and virtual welding problems, reduce stress, and reduce thermal expansion. The effect of different coefficients

Pending Publication Date: 2019-07-12
泰州隆基光伏科技有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0003] In view of this, the present invention proposes a solar battery sheet, aiming to solve the problems of hidden cracks and virtual welding at both ends of the existing electrode grid lines

Method used

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  • Solar cell piece
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Embodiment Construction

[0032] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0033] refer to figure 1 , image 3 with Figure 4 , the solar cell sheet of the embodiment of the present invention comprises: a silicon substrate 1, a fr...

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Abstract

The invention provides a solar cell piece. The solar cell piece comprises a silicon substrate, and a front main gate electrode and a back main gate electrode which are respectively arranged on the front surface and the back surface of the silicon substrate. The end portion of the front main gate electrode is provided with an arc structure protruding outwards; and / or the two ends of the back main gate electrode are provided with arc structures protruding outwards. According to the solar cell piece, the end portion of the front main gate electrode is provided with the arc structure to reduce thestress of the junction of a welding region and a non-welding region when welding is performed; the two ends of the back main gate electrode are provided with the arc structures to reduce the stress generated by an open region when welding is performed; the stress concentration of the front main grid electrode and the back main grid electrode of the cell piece is relieved to reduce the deformationdifference caused by different thermal expansion coefficients among different materials, and therefore the probability of hidden cracking and insufficient welding of the end portion of the main gateelectrode can be effectively reduced.

Description

technical field [0001] The present invention relates to the technical field of solar cells, in particular to a solar cell sheet. Background technique [0002] Existing solar cells are prone to hidden cracks at both ends of the electrode busbar during the serial welding process at the component end. According to statistics, the defects in the repair of the component manufacturing process are mainly reflected in the hidden cracks (accounting for about 5.8%) and virtual welding (accounting for 5.8%). about 3%), wherein, in the case of poor cracks, the cracks at both ends of the electrode busbar account for about 35%. During the on-site debugging process, it is possible to avoid welding at both ends of the electrode busbar by adjusting the flux spraying position, turning on the ribbon bending function, and adjusting the welding position of the ribbon on the electrode busbar to reduce the probability of hidden cracks. However, due to the stability and accuracy of the stringer, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/04
CPCH01L31/022425H01L31/04Y02E10/50
Inventor 王彬源刘朝何江涛
Owner 泰州隆基光伏科技有限公司
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