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IBC battery, battery pack and preparation method

A battery and doped region technology, applied in the field of solar cells, can solve problems such as cell damage, cost increase, and battery electrical performance reduction

Active Publication Date: 2016-11-23
YINGLI ENERGY CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology requires additional laser equipment for slicing, which increases the cost of additional processes and equipment, and the laser cutting process itself will bring additional damage to the battery sheet and reduce the electrical performance of the battery.

Method used

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  • IBC battery, battery pack and preparation method
  • IBC battery, battery pack and preparation method
  • IBC battery, battery pack and preparation method

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Embodiment Construction

[0028] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0029] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

[0030] like image 3 A...

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Abstract

The invention discloses an IBC (Interdigitated back contact) battery, a battery pack and a preparation method, and relates to the technical field of solar cell. The battery comprises an N-type silicon chip, the backlight surface of the N-type silicon chip is divided into upper part and lower part, each part comprises a row and several columns P-type doped area, a N-type doped area is arranged between P-type doped areas or P-type doped areas and an edge of the silicon chip to form the P-type doped areas and the N-type doped area which are arranged in an alternatively adjacent way, each doped area of the upper part is connected with a corresponding doped area of the lower part through the same main grid line, each main grid line comprises a plurality of auxiliary grid lines which is used for connecting auxiliary grid areas on the doped areas. Under a premise of maintaining battery photoelectric conversion efficiency of the IBM battery, the pressure opening of the battery can be increase, the electric current can be reduced, and the power loss caused by a welding strip resistance during component packaging can be reduced.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to an IBC battery, a battery pack and a preparation method. Background technique [0002] Solar power generation technology is an important field of new energy development, and improving the output power per unit area of ​​solar panels is the ultimate goal of solar cell technology progress. The main electrical parameters that determine the conversion efficiency of solar cells are short-circuit current, open-circuit voltage and fill factor. IBC batteries do not have metal electrodes on the light-receiving side of the battery, which can completely eliminate the optical loss on the front side and increase the short-circuit current. All electrodes are distributed on the back of the battery in a cross-fingered manner. The larger metallization area improves the battery fill factor. A good passivation process can increase the open circuit voltage of the battery. [0003] After the ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01L31/0352H01L31/068H01L31/18
CPCH01L31/022433H01L31/03529H01L31/068H01L31/1804Y02E10/547Y02P70/50
Inventor 王子谦刘大伟翟金叶李锋史金超宋登元
Owner YINGLI ENERGY CHINA
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