CN116646422A

CN116646422A - Preparation process for battery strings

Info

Publication number: CN116646422A
Application number: CN202310473715.8A
Authority: CN
Inventors: 冯波; 巩蕊
Original assignee: Suzhou Wisdom Valley Laser Intelligent Equipment Co Ltd
Current assignee: Suzhou Wisdom Valley Laser Intelligent Equipment Co Ltd
Priority date: 2023-04-28
Filing date: 2023-04-28
Publication date: 2023-08-25

Abstract

A process for preparing battery strings, including: arranging several battery sheets at equal intervals; preparing a ribbon group, which has a first section area and a second section area; preparing a diaphragm group, including several diaphragm strips, and The welding ribbons are attached one by one; attach the first section of the welding ribbon group to the front of the first diaphragm group to form a combination; turn the combination upside down, and then attach the second section of the welding ribbon group to the second The front of the diaphragm group forms a bonding assembly; the front of the second diaphragm group of the bonding assembly is bonded to the front of the cell to form a cell unit; several cell units are obtained repeatedly; the back of the cell of each cell unit is bonded Obtain the long section of the battery string on the front of the first module sheet of the adjacent battery sheet unit; cut the long section of the battery string to obtain several battery strings. The present invention can not only ensure sufficient lamination of the battery sheet and the welding strip, but also ensure the conduction rate of the current, and at the same time, the use of the strip-shaped diaphragm can prevent the entire film from covering the battery sheet from being too large, reducing the overall cost of the battery sheet. Surface lighting effects.

Description

Preparation process for battery strings

Technical Field

The invention relates to the field of battery string forming processing, in particular to a battery string forming preparation process.

Background

The conventional battery string manufacturing process is to contact and connect the welding band group of each group of the attaching components with the front surface of the first battery piece and the back surface of the second battery piece of the two adjacent battery pieces. The long strings of batteries are formed by stacking process and then cut to form battery strings.

In the prior art, the method for manufacturing the battery strings in strings comprises the following typical modes:

mode one: the welding strip is attached to the whole attaching foil, so that the attaching part of the welding strip and the attaching foil can be glued, and then the welding strip and the battery piece are stacked and welded. The whole-surface bonding has the advantages that the adhesive on the welding strip is uniform and completely coated, so that the battery piece and the welding strip are in complete bonding contact, and the conduction of current is facilitated. The solar cell has the advantages that the whole lamination foil is adopted to laminate the cell, the coverage area of the lamination foil is overlarge, and the whole area light-emitting property of the cell is affected to a certain extent.

And secondly, forming a battery string forming scheme by adopting an alternative dispensing scheme on the welding strip and the battery piece. Dividing each welding strip into two sections, dispensing glue points in the first section, and dispensing glue in the second section. The scheme is as follows: s1: taking a first welding strip as an example, firstly, dispensing glue on a first section area of the welding strip in a form of glue points; s2, stacking the battery piece 1 on a first section area (namely a dispensing section area) of the first welding strip; s3, dispensing glue on the upper surface of the stacked battery pieces 1 in a glue spot mode; s4, stacking a second section area of a second welding strip on the battery piece 1; s5, dispensing points in the first section area of the second welding strip; s6, stacking the battery piece 2 on the first section area (namely the dispensing section area) of the second welding strip; s7, dispensing glue on the upper surface of the stacked battery pieces 2 in a glue spot mode; and S8, stacking the second section area of the third welding strip on the battery piece 2, and repeatedly stacking to form a required battery string according to the scheme. The defect of this scheme lies in the battery piece glue point contact between the welding area, and welding area and battery piece non-point glue department are in unsettled state, fail to make battery piece and welding area laminating contact completely, and the conductivity of electric current is defective.

Therefore, how to effectively fix the solder strip to the battery piece and prepare the battery strings in series becomes the subject of the invention.

Disclosure of Invention

The invention aims to provide a battery string forming preparation process.

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

a process for preparing a string of battery strings, comprising:

firstly, arranging a plurality of battery pieces on a platform at equal intervals in a first direction, wherein the front surface of the battery pieces face upwards;

preparing a welding strip group, wherein the welding strip group comprises a plurality of welding strips which are arranged in parallel and equidistantly according to a second direction, and the second direction and the first direction are both horizontal directions and mutually perpendicular;

each welding strip in the welding strip group is divided into a first section area and a second section area along the length direction of the welding strip group;

preparing a membrane group, wherein the membrane group comprises a plurality of membrane strips which are arranged in parallel and equidistantly according to the second direction; the membrane strips are attached to the welding strips in a one-to-one correspondence manner, and the width of the membrane strips is larger than that of the welding strips;

attaching the first section area of the welding strip group to the front surface of the first membrane group to form a combined body;

step five, turning the assembly up and down, and attaching the second section area of the welding strip group to the front surface of the second membrane group to form an attaching assembly;

step six, attaching the front surface of the second membrane group of the attaching assembly to the front surface of the battery piece to form a battery piece unit;

step seven, repeating the step one to the step six to obtain a plurality of battery plate units;

step eight, attaching the back surface of the battery piece of each battery piece unit to the front surface of the first module piece of the adjacent battery piece unit to obtain a battery string long section;

and step nine, cutting the long sections of the battery strings to obtain a plurality of battery strings.

In a further technical scheme, in the second step, the welding band set is manufactured by cutting through a band manufacturing device.

In a further technical scheme, in the third step, the membrane group is manufactured by cutting through a membrane manufacturing device.

In the fourth step, the welding band set is taken up from the band making device by a carrying device through a mechanical arm, and the first section area of the welding band set is correspondingly attached to the first diaphragm set drawn out by the preparation diaphragm, so that the front face of the drawn first diaphragm set is attached to the first section area of the welding band set downwards.

In the fifth step, the assembly is turned over by a mechanical arm by a carrying device to realize turning over, and the front side of the first membrane group in the turned-over assembly faces upwards;

and after the second membrane group is attached to form the patch assembly, the front surface of the second membrane group faces downwards.

In the sixth step, the attaching assembly is attached to the battery piece by a mechanical arm through a handling device, so as to form the battery piece unit.

In the eighth step, the battery string long section is obtained by stacking and connecting every two adjacent battery sheet units in series by using a mechanical arm through a carrying device.

According to a further technical scheme, two adjacent membrane strips on the battery string are arranged at intervals.

Further technical solution, the stringing device includes:

the battery piece feeding device comprises a conveying belt for carrying and conveying the battery pieces to a preset position;

the battery piece placing platform is arranged corresponding to the preset position and comprises a battery piece placing and assembling station;

the welding strip manufacturing device is used for manufacturing welding strip groups and comprises a welding strip feeding mechanism, a welding strip traction mechanism, a welding strip cutting mechanism and a welding strip bending mechanism;

the carrying device comprises a mechanical arm and is used for carrying and overturning the welding belt group, matching with the film making device to finish the lamination of the film group and realizing the lamination of the battery piece units;

the film manufacturing device is used for preparing film strips corresponding to each welding strip in the welding strip group and comprises a film feeding mechanism, a film traction mechanism and a film cutting mechanism;

a string cutting device is provided with a battery string cutting mechanism and a distance separating mechanism.

According to a further technical scheme, when the battery piece supply device supplies battery pieces, the tape making device synchronously prepares the solder tape group, and the film making device synchronously prepares the film group.

The working principle and the advantages of the invention are as follows:

according to the invention, the welding strip group and the membrane group are prepared first, and the two different areas of the welding strip group and the two membrane groups are combined in sequence to form the attaching assembly, and then the attaching assembly is attached to the battery piece, so that the welding strip is effectively fixed on the battery piece, and the battery strings are prepared.

Compared with the prior art, the invention can ensure the full lamination of the battery piece and the welding strip, ensure the conductivity of current, and simultaneously can avoid overlarge coverage area of the whole piece of film to the battery piece by adopting the strip-shaped film, thereby reducing the whole lighting influence to the battery piece.

Drawings

FIG. 1 is a flow chart of steps of an embodiment of the present invention;

FIG. 2 is a schematic diagram showing the arrangement of the battery cells in step one of the embodiment of the present invention;

FIG. 3 is a schematic top view of a solder strip set in step two according to an embodiment of the present invention;

FIG. 4 is a perspective view of a strap set in step two of the present invention;

FIG. 5 is a perspective view of a set of diaphragms in step three of the present invention;

FIG. 6 is a perspective view of the assembly in step four of the present embodiment;

FIG. 7 is a perspective view of a bonding assembly according to a fifth embodiment of the present invention;

fig. 8 is a perspective view of a battery cell according to the sixth embodiment of the present invention;

FIG. 9 is a perspective view of a long section of a battery string in step eight of the present embodiment;

FIG. 10 is a schematic top view of a battery string in step nine of the present embodiment;

FIG. 11 is a perspective view of a battery string in step nine of the present embodiment;

fig. 12 is a schematic cross-sectional view of a battery string in step nine of the embodiment of the present invention.

In the above figures: 1. a battery sheet; 2. welding a band group; 21. welding a belt; 211. a first segment region; 212. a second segment region; 3. a diaphragm group; 31. a film strip; 3a, a first membrane group; 3b, a second diaphragm group; 4. a combination body; 5. a fitting assembly; 6. a battery cell unit; 7. a long section of the battery string; 8. and (3) battery strings.

Description of the embodiments

The invention is further described below with reference to the accompanying drawings and examples:

examples: the present invention will be described in detail with reference to the drawings, wherein modifications and variations are possible in light of the teachings of the present invention, without departing from the spirit and scope of the present invention, as will be apparent to those of skill in the art upon understanding the embodiments of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. Singular forms such as "a," "an," "the," and "the" are intended to include the plural forms as well, as used herein.

The terms "first," "second," and the like, as used herein, do not denote a particular order or sequence, nor are they intended to be limiting, but rather are merely used to distinguish one element or operation from another in the same technical term.

As used herein, "connected" or "positioned" may refer to two or more components or devices in physical contact with each other, or indirectly, or in operation or action with each other.

As used herein, the terms "comprising," "including," "having," and the like are intended to be open-ended terms, meaning including, but not limited to.

The term (terms) as used herein generally has the ordinary meaning of each term as used in this field, in this disclosure, and in the special context, unless otherwise noted. Certain terms used to describe the present disclosure are discussed below, or elsewhere in this specification, to provide additional guidance to those skilled in the art in connection with the description herein.

Referring to fig. 1, a process for preparing a battery string comprises:

step one, as shown in fig. 2, arranging a plurality of battery pieces 1 on a platform with right side facing upwards and equidistantly arranged according to a first direction interval;

step two, as shown in fig. 3 and 4, preparing a welding strip set 2, wherein the welding strip set 2 comprises a plurality of welding strips 21 which are arranged in parallel and equidistantly according to a second direction, and the second direction and the first direction are both horizontal and mutually perpendicular;

each solder ribbon 21 in the solder ribbon set 2 is divided into a first segment region 211 and a second segment region 212 along the length direction thereof;

the welding band set 2 can be manufactured by cutting through a band manufacturing device.

Step three, as shown in fig. 5, preparing a film group 3, wherein the film group 3 comprises a plurality of film strips 31 which are parallel and equidistantly arranged according to the second direction; the film strips 31 are used for being attached in one-to-one correspondence with the welding strips 21, and the width of the film strips 31 is larger than that of the welding strips 21;

the membrane group 3 can be manufactured by cutting through a membrane manufacturing device.

Step four, as shown in fig. 6, attaching the first section 211 of the welding strip set 2 to the front surface of the first membrane set 3a to form a combination 4;

the welding strip set 2 can be taken out from the strip manufacturing device by a mechanical arm through a carrying device, and the first section area 211 of the welding strip set 2 is correspondingly attached to the first membrane set 3a pulled out by the prepared membrane, so that the front surface of the pulled first membrane set 3a is attached to the first section area 211 of the welding strip set 2 downwards.

Step five, as shown in fig. 7, the assembly 4 is turned upside down, and then the second section area 212 of the welding strip set 2 is attached to the front surface of the second membrane set 3b, so as to form an attaching assembly 5; the front side of the film package 3 is referred to as the adhesive side or the side dedicated for application.

The combined body 4 can be turned up and down by 180 degrees through a carrying device by adopting a mechanical arm, and the front side of the first diaphragm group 3a in the turned combined body 4 faces upwards;

after the second membrane group 3b is attached to form the patch assembly 5, the front surface of the second membrane group 3b faces downwards.

Step six, as shown in fig. 8, the front surface of the second membrane group 3b of the attaching assembly 5 is attached to the front surface of the battery piece 1 to form a battery piece unit 6;

the attaching assembly 5 can be attached to the battery piece 1 by a handling device through a mechanical arm to form the battery piece unit 6.

Step seven, repeating the step one to the step six to obtain a plurality of battery piece units 6;

step eight, as shown in fig. 9, attaching the back surface of the battery piece 1 of each battery piece unit 6 to the front surface of the first module piece 3a of the adjacent battery piece unit 6 to obtain a battery string long section 7;

the battery piece units 6 adjacent to each other can be stacked and connected in series by a mechanical arm through a carrying device to obtain the battery string long section 7.

Step nine, as shown in fig. 10 to 12, cutting the long battery string sections 7 to obtain a plurality of battery strings 8, thereby completing the preparation.

The two adjacent membrane strips 31 on the battery string 8 are arranged at intervals, so that the membrane strips 31 can be effectively fixed on the butt welding belt 21, the coverage of the membrane strips 31 to the battery piece 1 is reduced, the light transmission of the battery piece 1 can be ensured, and the potential adverse effect of an excessive coverage area on the photovoltaic power generation efficiency of the battery piece 1 can be avoided.

The stringing device of the invention comprises:

a battery sheet feeding device includes a conveyor belt for carrying and transporting battery sheets 1 to a predetermined position.

The battery piece placing platform is arranged corresponding to the preset position and comprises a placing and assembling station of the battery piece 1.

After the battery piece 1 reaches a predetermined position, the assembly work is waited to be performed on the platform to form a string. The band making device can prepare a group of welding band groups 2 while the battery piece supplying device supplies the battery piece 1, and the film making device synchronously makes a film group 3 required by the welding band groups 2.

The tape manufacturing device is used for preparing the solder tape group 2 and comprises a solder tape feeding mechanism, a solder tape traction mechanism, a solder tape cutting mechanism and a solder tape bending mechanism.

The welding strip feeding mechanism is used for automatically feeding a plurality of coiled single welding strips required by the welding strip group 2, and the welding strip traction mechanism is used for dragging the welding strips 21 out of the welding strip feeding mechanism and pulling out required cutting lengths; the welding strip cutting mechanism is arranged between the welding strip feeding mechanism and the welding strip traction mechanism and is used for cutting to form a welding strip section; the welding strip bending mechanism performs bending treatment on the middle part of the welding strip, so that the welding strip 21 forms a first section area 211 and a second section area 212.

A film forming apparatus for preparing a film strip 31 corresponding to each of the bonding tapes 21 in the bonding tape group 2 includes a film feeding mechanism, a film drawing mechanism and a film cutting mechanism.

The film feeding mechanism is used for automatically feeding a plurality of coiled single film strips 31 required by the film group 3, and the film traction mechanism pulls the film strips 31 out of the film feeding mechanism and pulls the required cutting length to prepare the film strips 31 with the same number as that of the welding strips 21. The diaphragm cutting mechanism is arranged between the diaphragm feeding mechanism and the diaphragm traction mechanism and is used for cutting the diaphragm strips 31 to form a diaphragm group 3 required by the welding strip group 2.

The long battery segment string 7 is provided with a gap which is convenient to cut off at a preset position, and the welding strip 21 in the long battery segment string 7 is cut at the cutting gap by the battery string cutting mechanism, and is separated by the distance separating mechanism to obtain a battery string 8 with the required length.

The carrying device comprises a mechanical arm and is used for carrying and overturning the welding belt group 2, matching with the film forming device to finish the lamination of the film group 3 and realizing the lamination of the battery piece units 6.

The carrying device adopts a carrying mode of a mechanical arm, carries the welded band group 2 after cutting for the first time, and attaches the first section area 211 of the welded band group 2 to the first membrane group 3a, so that the front face of each membrane strip 31 in the first membrane group 3a is attached to the corresponding welded band 21 downwards to form the assembly 4.

Then, the carrying device turns the assembly 4 over 180 ° as a whole.

Next, the handling device steps the solder strip set 2 forward by a predetermined distance to attach the second segment area 212 of the solder strip set 2 to the second film set 3b, so that the front surface of each film strip 31 in the second film set 3b is attached to the corresponding solder strip 21 downward, thereby forming the attaching assembly 5.

At this time, the state of the attaching assembly 5, that is, the first section 211 of the bonding tape set 2 is turned from the first film set 3a to the first film set 3a with the front facing downward to attach to the bonding tape 21. The second film set 3b on the second segment area 212 of the solder strip set 2 is attached to the solder strip 21 with the front face facing downward.

Then, the carrying device carries the completed attaching assembly 5 to above the battery piece 1, and attaches the second membrane group 3b (with the front facing downward) in the attaching assembly 5 to the front of the battery piece 1, and the first membrane group 3a (with the front facing upward) is idle between the adjacent battery pieces 1 to form the battery piece unit 6.

Then, the carrying device repeatedly prepares the attaching assembly 5, sequentially composes the battery pieces 1 on the battery piece placing platform into battery piece units 6, stacks and serially connects every two adjacent battery piece units 6 prepared on the battery piece placing platform to prepare a battery section long string 7. Specifically, the handling device may adopt a handling manner of a manipulator, and one-to-one progressive stacking and/or one-to-one synchronous interval progressive stacking of the battery cells 6 is adopted.

The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.

Claims

1. A battery string preparing process is characterized in that: comprising the following steps:

preparing a membrane group, wherein the membrane group comprises a plurality of membrane strips which are arranged in parallel and equidistantly according to the second direction; the membrane strips are used for being attached in one-to-one correspondence with the welding strips, and the width of the membrane strips is larger than that of the welding strips;

2. The battery string production process according to claim 1, wherein: in the second step, the welding band group is cut by a band making device.

3. The battery string production process according to claim 1, wherein: in the third step, the membrane group is cut by a membrane making device.

4. The battery string production process according to claim 1, wherein: in the fourth step, the welding band group is taken up from the band making device by a carrying device through a mechanical arm, and the first section area of the welding band group is correspondingly attached to the first diaphragm group pulled out by the prepared diaphragm, so that the front surface of the pulled first diaphragm group is attached to the first section area of the welding band group downwards.

5. The battery string production process according to claim 1, wherein: in the fifth step, the combined body is turned over by a carrying device through a mechanical arm, and the right side of a first diaphragm group in the turned combined body faces upwards;

6. The battery string production process according to claim 1, wherein: in the sixth step, the attaching assembly is attached to the battery piece by a handling device through a mechanical arm, so that the battery piece unit is formed.

7. The battery string production process according to claim 1, wherein: in the eighth step, a handling device stacks and connects every two adjacent battery piece units in series by using a mechanical arm to obtain the long section of the battery string.

8. The battery string production process according to claim 1, wherein: and two adjacent membrane strips on the battery string are arranged at intervals.

9. The battery string production process according to claim 1, wherein: the stringing device comprises:

10. The battery string production process according to claim 9, wherein: when the battery piece supply device supplies the battery piece, the band making device synchronously prepares the welding band group, and the film making device synchronously prepares the film group.