CN214443701U

CN214443701U - Structure for improving insufficient welding of 9BB half double-sided PERC battery piece of series welding machine

Info

Publication number: CN214443701U
Application number: CN202023281571.7U
Authority: CN
Inventors: 任中彪; 杨明国; 郝俊彪; 杨文豹
Original assignee: Jinneng Photovoltaic Technology Co Ltd
Current assignee: Jinneng Photovoltaic Technology Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-10-22
Anticipated expiration: 2030-12-30

Abstract

The utility model discloses a structure for improving the false welding of 9BB half double-sided PERC battery pieces of a series welding machine, which comprises a welding table and a bottom plate module which are correspondingly arranged up and down; a plurality of welding pins are uniformly distributed on the bottom surface of the welding table; the bottom plate module is internally provided with a plurality of pad thimbles and positioning thimbles which can be lifted out of the top surface of the bottom plate module; the pad thimble corresponds to a pad of the battery piece; the positioning thimble is positioned at the head and tail end of the battery piece and corresponds to the welding needle at the head and tail end of the battery piece. The utility model discloses trompil again on current bottom plate module, newly increase the location thimble that the head and the tail correspond the welding needle, guarantee the good contact of the positive back of front head and tail pad welded to reach a better welding effect.

Description

Structure for improving insufficient welding of 9BB half double-sided PERC battery piece of series welding machine

Technical Field

The utility model relates to a photovoltaic trade subassembly production technical field, more specifically the structure that relates to an improve half two-sided PERC battery piece rosin joint of calf stringer 9 BB.

Background

The welding strip mainly comprises copper and tin, and the tin and the main grid line silver paste are fully mixed together at high temperature in the welding process, so that the welding is firmer.

The welding principle of the existing calf stringer on the market is as follows: under the action of high temperature and soldering flux, tin and lead on the solder strip and silver in the main grid line of the battery piece are mutually diffused to form alloy, and then the solder strip and the battery piece are connected together through extrusion of external force (screen pressing). The welding physical and chemical process comprises the following steps: wetting, diffusion dissolving and alloying. The nature of welding is that atomic contact occurs between the materials.

The welding process of the calf stringer is as follows: jacking a thimble of the bottom plate module during welding, wherein the thimble corresponds to the back grid line; then the welding table moves to a welding position, and the welding pin is pressed down and corresponds to the position of the front welding pad; the lamp tube is heated to start welding. The current welding is infrared welding, and three factors are as follows: temperature, contact, and flux. Because the welding pins on the welding table of the calf series welding machine are not in one-to-one correspondence with the ejector pins on the bottom plate module, the bottom plate module corresponding to the welding pads at the front end and the tail end of the battery piece is free of ejector pins, and the problems of insufficient soldering, desoldering and the like are prone to occurring.

Therefore, how to provide a structure capable of solving the problem of insufficient head-tail welding of a 9BB half double-sided PERC battery piece by a calf stringer is a problem that needs to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an improve structure of stringer 9BB half two-sided PERC battery piece rosin joint aims at solving above-mentioned technical problem.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a structure for improving insufficient welding of 9BB half double-sided PERC battery pieces of a series welding machine comprises a welding table and a bottom plate module which are correspondingly arranged up and down;

a plurality of welding pins are uniformly distributed on the bottom surface of the welding table;

the bottom plate module is internally provided with a plurality of pad thimbles and positioning thimbles which can be lifted out of the top surface of the bottom plate module; the pad thimble corresponds to a pad of the battery piece; the positioning ejector pin is located at the head and tail end of the battery piece and corresponds to the welding pin at the head and tail end of the battery piece.

Through the technical scheme, the utility model discloses trompil again on current bottom plate module, newly-increased the location thimble that the head and the tail correspond the welding needle, guarantee the good contact of positive head and the tail pad welded positive back to reach a better welding effect.

Preferably, in the structure for improving the false welding of the 9BB half double-sided PERC battery pieces of the series welder, the bottom plate module comprises 9 strip-shaped bottom plate molds arranged in parallel; the bottom plate mould is provided with 12 pad thimbles along the length direction; the 12 pad thimbles divide into two sets ofly, and the both ends of every group are evenly provided with the location thimble. This structure is reformed transform on current bottom module, trompil again on the upper cover plate of bottom plate mould originally, newly increases the hole that the head and the tail correspond the welding pin, corresponds position installation location thimble.

Preferably, in the structure for improving the false soldering of the 9BB half double-sided PERC cell of the stringer, the number of the soldering pins is 90, and the soldering pins are arranged on the soldering station in an arrangement of 9 columns × 10 rows; the 9 columns of welding pins correspond to the 9 bottom plate molds respectively. Can meet the use requirement.

Preferably, in the structure for improving the false welding of the 9BB half double-sided PERC cell of the series welding machine, the two half cells can be welded between the welding table and the bottom plate module; the battery piece is provided with 9 main grids, and each main grid is provided with 6 bonding pads. Can cooperate welding bench and bottom plate module to process.

Preferably, in the structure for improving the insufficient soldering of the 9BB half double-sided PERC cell of the series welder, the welding pins are made of ceramic. Can meet the use requirement.

Can know via foretell technical scheme, compare with prior art, the utility model discloses an improve structure of half two-sided PERC battery piece rosin joint of stringer 9BB has following beneficial effect:

1. the utility model discloses trompil again on current bottom plate module, newly increase the location thimble that the head and the tail correspond the welding needle, guarantee the good contact of the positive back of front head and tail pad welded to reach a better welding effect.

2. The utility model provides a positive back end to end rosin joint problem among present half piece subassembly series welding process, optimized current welding module.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic diagram of a structure for improving the insufficient solder joint of a 9BB half double-sided PERC cell of a stringer provided by the present invention;

FIG. 2 is a schematic structural view of a bottom surface of a welding table according to the present invention;

fig. 3 is a schematic structural diagram of the top surface of the bottom plate module according to the present invention.

Wherein:

1-a welding table;

11-a welding pin;

2-a backplane module;

21-a base plate mold; 211-pad thimble; 212-positioning pin.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to the attached drawings 1 to 3, the embodiment of the utility model discloses a structure for improving the false welding of 9BB half double-sided PERC battery pieces of a series welding machine, which comprises a welding table 1 and a bottom plate module 2 which are correspondingly arranged up and down;

a plurality of welding pins 11 are uniformly distributed on the bottom surface of the welding table 1;

the bottom plate module 2 is internally provided with a plurality of pad thimbles 211 and positioning thimbles 212 which can be lifted out of the top surface; the pad thimble 211 corresponds to a pad of the battery piece; the positioning thimble 212 is located at the head and tail end of the battery piece and corresponds to the welding needle 11 at the head and tail end of the battery piece.

In order to further optimize the technical scheme, the bottom plate module 2 comprises 9 strip-shaped bottom plate moulds 21 which are arranged in parallel; the bottom plate mold 21 is provided with 12 pad ejector pins 211 along the length direction thereof; the 12 pad thimbles 211 are divided into two groups, and two ends of each group are respectively provided with a positioning thimble 212.

In order to further optimize the technical scheme, the number of the welding pins 11 is 90, and the welding pins are arranged on the welding table 1 in an arrangement mode of 9 columns and 10 rows; the 9 rows of welding pins 11 correspond to the 9 bottom plate molds 21 respectively.

In order to further optimize the technical scheme, two half battery plates can be welded between the welding table 1 and the bottom plate module 2; the cell piece has 9 main bars, and each main bar has 6 pads thereon.

In order to further optimize the above technical solution, the welding pin 11 is made of ceramic.

The reasons for the generation of cold joint generally include the following three aspects:

1. the solder strip has a thin tin coating, and cannot form alloy or leads to instability of the formed alloy in the welding process.

2. The temperature is abnormal, so that the diffusion process of tin, lead and silver is unstable.

3. The external force extrusion is not in place, the contact between the welding strip and the battery piece is poor, and the effect of the alloying process is poor.

The utility model discloses trompil again on current bottom plate mould 21, newly-increased head and the tail correspond the location thimble 212 of welding pin 11, guarantee the good contact at the positive back of positive head and the tail pad welded to reach a better welding effect.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A structure for improving insufficient soldering of 9BB half double-sided PERC battery pieces of a series welding machine comprises a welding table (1) and a bottom plate module (2) which are correspondingly arranged up and down; the method is characterized in that:

a plurality of welding pins (11) are uniformly distributed on the bottom surface of the welding table (1);

the bottom plate module (2) is internally provided with a plurality of pad thimbles (211) and positioning thimbles (212) which can be lifted out of the top surface of the bottom plate module; the pad thimble (211) corresponds to a pad of the battery piece; the positioning ejector pin (212) is located at the head and tail end of the battery piece and corresponds to the welding pin (11) at the head and tail end of the battery piece.

2. The structure for improving the cold joint of 9BB half double-sided PERC battery plates of a series welder according to claim 1, wherein the base plate module (2) comprises 9 strip-shaped base plate dies (21) arranged in parallel; the bottom plate mould (21) is provided with 12 pad thimbles (211) along the length direction; the 12 pad thimbles (211) are divided into two groups, and the two ends of each group are respectively provided with the positioning thimbles (212).

3. The structure for improving the cold joint of 9BB half double-sided PERC battery pieces of the stringer according to claim 2, wherein the number of the welding pins (11) is 90, and the welding pins are arranged on the welding table (1) in an arrangement of 9 columns by 10 rows; the 9 columns of welding pins (11) correspond to the 9 bottom plate molds (21) respectively.

4. The structure for improving the cold joint of 9BB half double-sided PERC battery plates of a series welder according to any one of claims 1 to 3, wherein the two half battery plates can be welded between the welding table (1) and the bottom plate module (2); the battery piece is provided with 9 main grids, and each main grid is provided with 6 bonding pads.

5. The structure for improving the cold joint of the 9BB half double-sided PERC battery piece of the stringer according to claim 4, wherein the welding pins (11) are made of ceramic.