"Z" -shaped pattern slotting structure applicable to thin-sheet PERC battery

A word pattern and battery technology, which is applied in the field of "Z" pattern slot structure, can solve the problems of unreasonable slot design, multiple fragments, and high warpage of cells, so as to reduce warpage, improve battery efficiency, The effect of reducing the battery broken rate

Pending Publication Date: 2019-11-26
TONGWEI SOLAR (ANHUI) CO LTD +1
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the grooved structure of the rear passivation film mentioned above is unreas

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • "Z" -shaped pattern slotting structure applicable to thin-sheet PERC battery
  • "Z" -shaped pattern slotting structure applicable to thin-sheet PERC battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] see Figure 1-2 , the present invention provides a technical solution:

[0020] A "Z" pattern slotting structure suitable for thin PERC cells, comprising a silicon substrate 1, a passivation film 2 provided on the back of the silicon substrate 1, and slotting lines 3 provided on the passivation film 2, the slotting lines 3. It includes a number of horizontal laser grooves 31 arranged at equal intervals and a number of vertical laser grooves 32 arranged...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Lengthaaaaaaaaaa
Widthaaaaaaaaaa
Login to view more

Abstract

The present invention discloses a "Z" -shaped pattern slotting structure applicable to a thin-film PERC battery. The "Z" -shaped pattern slotting structure comprises a silicon substrate, a passivationfilm arranged on the back surface of the silicon substrate, and slotted lines arranged on the passivation film; the slotted lines comprise a plurality of equally spaced horizontal laser slots and a plurality of equally spaced vertical laser slots; the horizontal laser slots and the vertical laser slots have the same length; the horizontal laser slots and the vertical laser slots are connected endto end to form "Z" -shaped slotted lines; a plurality of slotted lines are equidistantly arranged on the surface of the passivation film. According to the slotting structure of the passivation film on the back surface of the PERC solar battery provided by the present invention, the aluminum paste on the back surface of the battery is in good contact with the silicon wafer, and the battery efficiency is slightly improved, efficiency improvement is more reflected in the increase of the open-circuit voltage and the filling, especially for thin silicon wafers; and the crushing rate of the slottedpattern batteries is reduced, and the warpage is reduced.

Description

technical field [0001] The invention relates to the technical field of photovoltaic cells, in particular to a "Z" pattern slotting structure suitable for sheet PERC cells. Background technique [0002] Improving the efficiency of solar cells and reducing costs are the two major themes of photovoltaic development. The conventional aluminum back field is severely recombined on the back, and further improvement in efficiency is very limited. However, coating a passivation film on the back can greatly reduce the recombination of the back surface and improve the minority carrier lifetime. The battery efficiency is greatly improved. [0003] The passivation film is non-conductive and insulating, and the back is made of aluminum paste. It is necessary to slot the passivation film on the back to draw out the current. The design of the slot pattern has a great influence on the electrical performance of the battery. In the prior art, the application number is "201621361451.9". The gr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01L31/0216H01L31/0236H01L31/028H01L31/04
CPCH01L31/02167H01L31/02366H01L31/028H01L31/04Y02E10/547
Inventor 眭山张鹏陈坤王璞王岚苏荣李忠涌
Owner TONGWEI SOLAR (ANHUI) CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap