CN114725229A

CN114725229A - Battery string monomer, battery string, production methods of battery string monomer and battery string, and production equipment of battery string

Info

Publication number: CN114725229A
Application number: CN202210349657.3A
Authority: CN
Inventors: 陈世庚; 路倩忠; 何嘉欣
Original assignee: Ningxia XN Automation Equipment Co Ltd
Current assignee: Ningxia XN Automation Equipment Co Ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-07-08
Anticipated expiration: 2042-04-02
Also published as: CN114725229B

Abstract

The invention discloses a battery string. The welding tape is fixed on the grid line on the back of the battery by gluing the film on the back of the battery. In addition, it can effectively protect the welding strip and the back of the battery, which is beneficial to improve the service life of the battery string. The invention also discloses a battery string production method, battery string monomer, battery string monomer production method and battery string production equipment; the battery string production method is easy to operate and has various forms; The method is conducive to the continuous production of battery strings; the production method of battery string monomers can produce a variety of battery string monomers with different overlapping sections, and realize the continuous overlapping of battery string monomers into strings, which is conducive to the realization of battery string monomers. Efficient, continuous production of strings.

Description

Battery string monomer, battery string, production methods of battery string monomer and battery string, and production equipment of battery string

Technical Field

The invention relates to the technical field of batteries, in particular to a battery string monomer, a battery string, production methods of the battery string monomer and the battery string, and production equipment of the battery string monomer and the battery string.

Background

In traditional crystal silicon battery pack, weld the positive and negative two sides of taking at the battery cluster, connect the positive negative pole of battery piece through welding the area promptly, the solar energy component who so forms can cause partial optical loss because of welding the area and sheltering from the sunlight ray, has reduced the generating efficiency of battery piece. With the development of solar cell technology, the heterojunction solar cell will become one of the mainstream solar cell technologies in the future by virtue of its high-efficiency and ultrashort production process, and in order to reduce optical loss, the heterojunction solar cell can be made into a single-sided electrode cell, that is, a cell with positive and negative electrodes on the back side at the same time; the positive and negative electrodes on the back surfaces of the two adjacent battery pieces are connected through the welding strips, and the welding strips are located on the same surface of the battery string.

In the prior art, a high-temperature welding mode is usually used for connecting a welding strip with a positive electrode and a negative electrode on the back surface of a battery piece, and the conventional high-temperature single-side welding has large stress, so that the battery piece is easy to warp and poor in insufficient solder joint leakage welding and the like. Therefore, an innovative solution for producing battery strings is needed to overcome the above drawbacks and to achieve efficient and continuous production of battery strings.

Disclosure of Invention

One of the objectives of the present invention is to provide a battery string, in which a bonding tape is attached and fixed to the back surface of a battery piece by using a bonding film (also referred to as "glue film"), so as to solve the problems that the single-side welding tape of the battery piece is prone to poor phenomena such as warpage of the battery piece after welding and insufficient soldering leakage. In order to achieve the purpose, the invention provides the following scheme:

a battery string comprises a welding strip and at least two battery pieces, wherein the welding strip is only arranged on the back surfaces of the battery pieces so as to connect any two adjacent battery pieces in series; the welding strip is characterized by further comprising an adhesive membrane positioned on the outermost layer of the back surface of the battery piece, and the adhesive membrane is adhered to the back surface of the battery piece so as to fix the welding strip on a grid line on the back surface of the battery piece.

Optionally, the adhesive film is an integral continuous adhesive film covering the whole back of the battery string, and a gap between any two adjacent battery pieces is covered by the integral continuous adhesive film.

Optionally, the adhesive film sheet includes at least two single-piece adhesive film sheets arranged in a broken manner.

Optionally, the area of the single-piece adhesive film is larger than that of the battery piece, and any one of the single-piece adhesive films can cover at least one of the battery pieces.

Optionally, the area of the single-piece adhesive film is smaller than or equal to the area of the battery piece.

Optionally, when the area of the single-piece adhesive film is equal to the area of the battery piece, the single-piece adhesive film and the battery piece are arranged in a one-to-one correspondence manner.

Optionally, when the area of the single-piece adhesive film is smaller than the area of the battery piece, at least one single-piece adhesive film is arranged on any one battery piece.

Optionally, at least two single-piece adhesive connecting membranes are arranged in the same battery string at intervals, and the areas of any two single-piece adhesive connecting membranes are different.

Optionally, the adhesive film is a hot melt adhesive film, and the hot melt adhesive film is connected to the back of the battery piece.

Optionally, at least one side of the adhesive membrane has adhesive properties.

Optionally, the adhesive film is a single-layer adhesive film, and both surfaces of the adhesive film are provided with adhesive surfaces made of adhesive polymer materials; or the adhesive film is a double-layer structure film formed by attaching a layer of adhesive film made of adhesive polymer material to another layer of film made of ductile polymer material, and one side of the double-layer structure film is an adhesive surface; or the adhesive film is a double-sided adhesive film with adhesive polymer materials arranged on both sides of a layer of malleable polymer material film.

Optionally, the adhesive film is made of ethylene-vinyl acetate copolymer (EVA for short), polyethylene oxide (POE for short), polyvinylidene chloride (PVD for short), polyamide (PA for short), polyether sulfone resin (PES for short), ethylene-acrylic acid copolymer (PO for short), thermoplastic polyurethane elastomer (TPU for short), or polyvinyl butyral (PVB for short).

Another object of the present invention is to provide a battery string monomer, wherein a welding strip is attached and fixed to the back surface of a battery piece by using a glue connection membrane, so as to solve the problem that the battery piece single-side welding strip is prone to undesirable phenomena such as post-welding battery piece warping and insufficient soldering leakage, and meanwhile, the efficient and continuous production of the battery string can be realized. In order to achieve the purpose, the invention provides the following scheme:

a battery string monomer comprises a welding strip and at least two battery pieces, wherein the welding strip is only arranged on the back of each battery piece so as to connect any two adjacent battery pieces in series; the battery cluster monomer including the encapsulation section with set up at least in the overlap joint section of encapsulation section one end, the outmost at the battery cluster monomer back is provided with glues even diaphragm, wherein:

in the packaging section, the adhesive film is bonded to the back surface of the battery piece, and the welding strip is fixed on the grid line on the back surface of the battery piece;

in the lap joint section, the adhesive connecting surface of the adhesive connecting membrane for bonding the battery piece is exposed, and the welding strip extending out of the back surface of the battery piece of the packaging section extends to the exposed adhesive connecting surface;

or in the overlapping section, the back surface of the battery piece is exposed, and the welding strip extending out of the back surface of the battery piece of the packaging section extends to the back surface of the battery piece in the overlapping section.

Optionally, the adhesive film is a continuous adhesive film.

Optionally, at least two single-piece adhesive connecting membranes are arranged in the same single battery string at intervals, and the areas of any two single-piece adhesive connecting membranes are different.

Optionally, at least one side of the adhesive film sheet has adhesiveness.

Another object of the present invention is to provide a method for producing a battery string, wherein a bonding film is used to attach and fix a solder strip to the back surface of a battery piece, so as to solve the problems of poor phenomena such as warpage of the battery piece after soldering and insufficient solder joint leakage of the battery piece during single-sided soldering of the battery piece, and to achieve efficient and continuous production of the battery string. In order to achieve the above purpose, the invention provides the following two parallel schemes:

a method for producing a battery string comprises the following steps:

s1, paving an adhesive film;

s2, laying a welding strip and a battery piece on the adhesive film piece, and enabling the welding strip to be located between the back of the battery piece and the adhesive film piece;

and S3, carrying out bonding treatment on the adhesive film so as to enable the adhesive film to be bonded on the back surface of the battery piece, and fixing the welding strip on the grid line on the back surface of the battery piece.

Optionally, the step S2 includes the steps of:

s21, laying the welding strip on the gluing film; the welding strip is paved at one time, or the welding strip is paved in multiple times;

s22, laying the battery piece on the adhesive membrane piece; the battery piece is laid at one time, or the battery pieces are laid in multiple times.

Optionally, the adhesive film is a hot-melt adhesive film, and a step between step S21 and step S22 is further included:

s211, heating the hot melt adhesive film, and then cooling and solidifying to enable the welding strip to be attached to the hot melt adhesive film in an adhesive mode.

Optionally, step S2 is: synchronously laying the welding strip and the battery piece on the adhesive film; the welding strip and the battery piece are synchronously paved at one time, or the welding strip and the battery piece are synchronously paved at different times.

Optionally, when the hot melt adhesive film is heated in the step S211, the heating temperature is 20 ℃ to 200 ℃.

Optionally, the adhesive film in step S1 is an integral continuous adhesive film, and the length of the integral continuous adhesive film is adapted to the overall length of the battery string to be produced;

alternatively, the adhesive film sheet in step S1 includes at least two separated single-sheet adhesive film sheets.

(II) a battery string production method, comprising the following steps:

s1, laying the battery piece, and enabling the back of the battery piece to face upwards;

s2, laying a welding strip and an adhesive film on the back surface of the battery piece, and enabling the welding strip to be located between the back surface of the battery piece and the adhesive film;

Optionally, the step S2 includes the steps of:

s21, laying the solder strip on the battery piece; the welding strip is paved at one time, or the welding strip is paved in multiple times;

s22, laying the adhesive film piece on the welding strip; wherein, the adhesive film piece is paved at one time or in multiple times.

Optionally, step S2 is:

synchronously laying the welding strip and the adhesive film sheet on the battery sheet; the welding strip and the adhesive film piece are synchronously paved at one time, or the welding strip and the adhesive film piece are synchronously paved at different times.

Optionally, the adhesive film is a hot-melt adhesive film, and before the solder strip and the hot-melt adhesive film are synchronously laid on the battery piece, the method further includes the steps of:

s211, will the solder strip is laid on the hot melt adhesive membrane, or is made the hot melt adhesive membrane cover is in on the solder strip, and right the hot melt adhesive membrane heats, then cooling solidification, so that the solder strip glue even in on the hot melt adhesive membrane.

Optionally, the adhesive film in step S2 is an integral continuous adhesive film, and the length of the integral continuous adhesive film is adapted to the overall length of the battery string to be produced;

alternatively, the adhesive film sheet in step S2 includes at least two separated single-piece adhesive film sheets.

Another object of the present invention is to provide a method for producing a battery string by using an adhesive film to attach and fix a solder strip to the back surface of a battery piece, so as to solve the problem that the above-mentioned battery piece single-side soldering strip is prone to poor phenomena such as post-soldering battery piece warpage and insufficient solder joint leakage, and simultaneously achieve efficient and continuous production of the battery string. In order to achieve the above purpose, the invention provides the following two parallel schemes:

a method for producing a battery string monomer comprises the following steps:

s1, paving an adhesive film;

s2, laying a solder strip and a battery sheet on the adhesive film to form a laying whole, wherein the laying whole is provided with a packaging section and a lap joint section at least arranged at one end of the packaging section; wherein,

in the packaging section, the welding strip is positioned between the gluing film sheet and the back surface of the battery sheet;

in the lap joint section, the gluing surface of the gluing membrane for gluing the battery piece is exposed, and the welding strip extending out of the back surface of the battery piece of the packaging section extends to the exposed gluing surface; or in the overlapping section, the back surface of the battery piece is exposed, and the welding strip extending out of the back surface of the battery piece of the packaging section extends to the back surface of the battery piece in the overlapping section;

and S3, carrying out bonding treatment on the adhesive film so as to enable the adhesive film in the packaging section to be bonded on the back surface of the battery piece, and fixing the welding strip on the grid line on the back surface of the battery piece.

Optionally, the adhesive film is a hot melt adhesive film, and the hot melt adhesive film is heated in step S3, and then cooled and solidified to fix the solder strip on the grid line on the back of the battery piece. Wherein, when the hot melt adhesive film is heated, the heating temperature is 20-200 ℃.

(II) a method for producing a battery string monomer, which is characterized by comprising the following steps:

s2, laying solder strips and adhesive film sheets on the back surfaces of the battery sheets to form a laying whole, wherein the laying whole is provided with a packaging section and a lap joint section at least arranged at one end of the packaging section; wherein,

in the lap joint section, the gluing surface of the gluing membrane for adhering the battery piece is exposed, and the welding strip extending from the back surface of the battery piece of the packaging section extends to the exposed gluing surface; or in the overlapping section, the back surface of the battery piece is exposed, and the welding strip extending out of the back surface of the battery piece of the packaging section extends to the back surface of the battery piece in the overlapping section;

The invention also provides a battery string production method based on the battery string monomer produced by the battery string monomer production method, which comprises the following steps:

1) the battery string monomer is produced by adopting the battery string monomer production method;

2) continuously overlapping the lap joint section of the next single battery string with the lap joint section of the previous single battery string;

3) bonding the adhesive film sheet of the lap joint section to bond the adhesive film sheet of the lap joint section in one battery string monomer to the back surface of the battery sheet of the lap joint section in the other battery string monomer, and fixing the welding strip on a grid line of the back surface of the battery sheet;

4) and in the process of forming the battery string by continuously overlapping the battery string monomers, cutting off the welding strip at the string interval meeting the requirement to obtain the battery string meeting the length requirement.

Optionally, the adhesive film is a hot melt adhesive film, and the hot melt adhesive film is heated in the step 3), and then cooled and solidified to attach the solder strip to the grid line on the back of the battery piece. Wherein, when the hot melt adhesive film is heated, the heating temperature is 20-200 ℃.

The invention also aims to provide a battery string production device, which is used for attaching and fixing the welding strip on the back surface of the battery piece through the adhesive film, so as to solve the problems that the single-side welding strip of the battery piece is easy to have poor phenomena such as warping of the battery piece after welding, insufficient welding, missing welding and the like, and simultaneously realize the efficient and continuous production of the battery string. In order to achieve the purpose, the invention provides the following scheme:

a battery string production apparatus comprising:

the film supply mechanism is used for supplying the adhesive film;

the sheet supply mechanism is used for supplying the battery sheets;

a tape supply mechanism for supplying a solder tape;

a load-bearing platform;

the material transfer mechanism can transfer the gluing membrane, the battery piece and/or the welding strip to the bearing platform, and enables the welding strip to be located between the back surface of the battery piece and the gluing membrane piece;

and the bonding device is used for bonding the adhesive film piece to the back surface of the battery piece so as to fix the welding strip on the grid line on the back surface of the battery piece.

Optionally, the adhesive film is a hot melt adhesive film, the bonding device is a heating device, and the heating device is used for heating the hot melt adhesive film, so that the hot melt adhesive film is attached to the back of the battery piece, and the welding strip is fixed on the grid line on the back of the battery piece.

Optionally, the film supply mechanism includes:

the film roll is an adhesive film wound into a roll;

the film drawing device is used for drawing out an adhesive film sheet matched with the length of the battery string to be produced from the film roll;

the film cutting device at least can cut the adhesive film piece pulled out by the film pulling device from the film roll;

the film pressing device is used for pressing the film cutting device during film cutting to glue the film, and the film pressing device and the film cutting device are provided with a gap therebetween so that the glue film is cut off, and the film roll is reserved with a film remaining edge which is convenient for the film drawing device to draw the film next time.

Optionally, the film supply mechanism further comprises a film roll mounting device, and the film roll is rotatably mounted on the film roll mounting device.

Optionally, the film supply mechanism further comprises a film bearing table, the film bearing table comprises a plurality of separated single bodies which are sequentially arranged along the extending direction of the battery string to be produced, and any two adjacent separated single bodies can relatively slide along the extending direction of the battery string to be produced; and the front side of any one of the spacing monomers is provided with the film cutting device so as to cut the adhesive film into a plurality of single-piece adhesive films.

Optionally, the membrane plummer doubles as the load-bearing platform, material shifts the mechanism and includes smuggleing secretly the device and inhaling the piece device to with weld the area with the battery piece shifts to on the membrane plummer.

Optionally, the diaphragm plummer doubles as load-bearing platform, supply to take the mechanism to include:

the welding strip coil is a welding strip wound into a coil;

the tape drawing device is used for drawing the welding tape from the welding tape roll;

the belt cutting device is used for cutting the welding belt pulled out by the belt pulling device into a welding belt section matched with the battery string to be produced;

wherein, the solder strip section is directly laid on the gluing diaphragm, the material transfer mechanism comprises a suction device, so as to transfer the battery piece to the bearing platform.

Optionally, the film supply mechanism doubles as the bearing platform, the film supply mechanism and the tape supply mechanism are respectively located at two sides of the film supply mechanism, or the film supply mechanism and the tape supply mechanism are arranged at the same side of the film supply mechanism.

Optionally, the film supplying mechanism and the tape supplying mechanism are respectively located at two sides of the carrying platform, and the film supplying mechanism is located at one end of the carrying platform;

or the film supply mechanism and the film supply mechanism are positioned on the same side of the bearing platform.

Compared with the prior art, the invention has the following technical effects:

according to the battery string provided by the invention, the welding strip is fixed on the grid line on the back surface of the battery piece in a manner that the adhesive film is adhered to the back surface of the battery piece, so that the welding strip and the battery piece are fixed, the problems that the battery piece is easy to warp after welding and poor phenomena such as insufficient soldering and missing soldering are easily caused when the welding strip is welded on the back surface of the battery piece are solved, the adhesive film can effectively protect the welding strip and the back surface of the battery piece, and the service life of the battery string is prolonged.

In some technical schemes provided by the invention, the adhesive film is a hot-melt adhesive film, the adhesive surface of the hot-melt adhesive film melts the adhesive solution by heating, and the adhesive solution is solidified (solidification can be understood as hardening) after cooling, so that the adhesive layer (i.e. the adhesive surface) and the back surface of the battery piece are bonded more firmly, the fixation of the solder strip and the battery piece is realized, the fixation mode is firm, the problems of poor phenomena of warping of the battery piece after welding, insufficient soldering, missing soldering and the like easily occurring in the welding of the back surface of the battery piece are solved, the solder strip and the back surface of the battery piece are effectively protected, and the service life of the battery string is prolonged.

According to the method for producing the battery string, the welding strip is attached and fixed on the back surface of the battery piece through the gluing membrane, the problems that poor phenomena such as warping of the battery piece after welding, insufficient soldering and missing soldering and the like easily occur to the single-side welding strip of the existing battery piece can be solved, and meanwhile, efficient and continuous production of the battery string is facilitated.

The battery string monomer provided by the invention fixes the welding strip on the grid line on the back surface of the battery piece in a mode of adhering the adhesive film piece to the back surface of the battery piece. Meanwhile, the battery string monomers adopt a mode of combining the packaging section and the lap joint section, so that the battery string monomers can be continuously lapped and strung, and further, the efficient and continuous production of the battery string is realized.

The production method of the battery string monomer can produce various battery string monomers with different lap joint sections, can realize continuous lap joint and string formation of the battery string monomers, and is beneficial to realizing efficient and continuous production of the battery string.

The invention also provides a battery string production method based on the battery string monomers, which utilizes the battery string monomers with different lap joint sections to realize continuous lap joint and string formation among the battery string monomers and further realize efficient and continuous production of the battery string.

The invention provides a battery string and a battery string monomer, which both relate to the structural form of adopting an integral continuous adhesive connecting membrane and a single-chip adhesive connecting membrane (or called as a sectional adhesive connecting membrane), wherein the integral continuous adhesive connecting membrane is directly laid and covered on the back of the whole string of batteries or the whole string of battery string units, and the invention has the advantages of convenient and fast production and less improvement on the existing equipment; and when the single-piece type gluing membrane (or called as a sectional type gluing membrane) is laid, an interval exists, and the whole string of battery strings are covered by the whole continuous gluing membrane, so that the effect of fixing the welding strip is guaranteed, the using amount of the gluing membrane is saved, and the production cost is saved.

The battery string production equipment provided by the invention can implement any one of the above battery string production methods and the battery string monomer production method.

In addition, in some schemes disclosed by the invention, the film supply mechanism, the sheet supply mechanism, the belt supply mechanism and the bearing platform adopt different azimuth layouts, so that a battery string production method or a battery string single body production method with different process steps can be realized, and the battery string production method has various forms and is flexible to use.

Drawings

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

FIG. 1 is a schematic view of the connection of solder strips to battery pieces;

fig. 2 is a schematic structural diagram of a battery string laid on the basis of a monolithic continuous adhesive film according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a battery string based on single-piece adhesive film laying according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart of the step-by-step synchronous laying of the solder strip and the battery piece according to the embodiment of the present invention;

FIG. 5 is another schematic flow chart of the welding strip and the battery piece laying step by step according to the embodiment of the present invention;

fig. 6 is a schematic flow chart of a battery string monomer structure based on single-chip adhesive film laying and a battery string formed based on battery string monomer overlapping according to an embodiment of the present invention;

fig. 7 is another schematic flow chart of a cell string monomer structure based on single-sheet adhesive film laying and cell string monomer overlapping to form a cell string according to the embodiment of the present invention;

FIG. 8 is a schematic diagram of a cell string with a continuous adhesive film laid thereon according to an embodiment of the present invention;

fig. 9 is a schematic diagram of a battery string produced by laying battery plates first and using an integral continuous adhesive film according to an embodiment of the present invention;

fig. 10 is a schematic diagram of a battery string produced by laying a single-piece adhesive film in advance according to an embodiment of the present invention;

fig. 11 is a schematic diagram of a battery string produced by laying battery plates first and using a single-piece adhesive film according to an embodiment of the present invention;

fig. 12 is a schematic diagram of a battery string production process in which an adhesive film is first fixed to a solder strip by adhesive and then a battery piece is laid, according to an embodiment of the present invention;

fig. 13 is a schematic structural view of a battery string production apparatus in which the film supply mechanism also serves as a carrying platform, and the film supply mechanism and the tape supply mechanism are respectively located at two sides of the film supply mechanism according to the embodiment of the present invention;

fig. 14 is a schematic structural view of a battery string production apparatus in which the film supply mechanism also serves as a carrying platform, and the film supply mechanism and the tape supply mechanism are located on the same side of the film supply mechanism according to the embodiment of the present invention;

fig. 15 is a schematic structural diagram of a battery string production apparatus in which a sheet supply mechanism and a tape supply mechanism are respectively located at two sides of a carrying platform, and a film supply mechanism is located at one end of the carrying platform according to an embodiment of the present invention;

fig. 16 is a schematic structural view of a battery string production apparatus in which a sheet feeding mechanism and a tape feeding mechanism are respectively located at two sides of a carrying platform, and a film feeding mechanism and the sheet feeding mechanism are located at the same side of the carrying platform according to the embodiment of the present invention;

fig. 17 is a schematic structural diagram of an intermittent lamination device according to an embodiment of the present invention;

fig. 18 is a schematic structural diagram of a continuous film pressing device according to an embodiment of the present invention;

FIG. 19 is a schematic structural diagram of a first material transfer mechanism according to an embodiment of the present invention;

fig. 20 is a schematic structural diagram of a second material transfer mechanism according to an embodiment of the disclosure.

Wherein the reference numerals are:

100. a battery string;

200. a battery string monomer; 201. a packaging section; 202. a lap joint section;

300. a battery string production device;

1. welding a strip;

2. a battery piece;

3. the whole continuous glue-connected membrane is formed;

4. a single sheet of adhesive film;

5. a film supply mechanism; 51. rolling the film; 52. a film drawing device; 53. a film cutting device; 531. a cutter; 54. a film pressing device; 55. a membrane carrier; 56. a spacing monomer;

6. a sheet supply mechanism;

7. a tape supply mechanism; 71. welding a coil;

8. a load-bearing platform;

9. a material transfer mechanism; 91. an entrainment device; 92. a sheet suction device;

10. a heating device.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

One of the objectives of the present invention is to provide a battery string, in which a solder strip is attached and fixed to the back surface of a battery piece by using an adhesive film, so as to solve the problem that the conventional single-sided soldering of the battery piece is prone to poor phenomena such as warpage of the battery piece after soldering and insufficient soldering leakage.

Another object of the present invention is to provide a battery string monomer, wherein a welding strip is attached and fixed to the back surface of a battery piece by using a glue connection membrane, so as to solve the problem that the existing single-side welding strip for the battery piece is prone to poor phenomena such as warping of the battery piece after welding and missing of cold welding, and simultaneously, the battery string monomer can realize efficient and continuous production.

The invention also aims to provide a battery string production method, wherein the welding strip is attached and fixed on the back surface of the battery piece through the adhesive film, so that the problems that the single-side welding strip of the existing battery piece is easy to cause poor phenomena such as warping of the welded battery piece, insufficient soldering and missing soldering and the like are solved, and meanwhile, the efficient and continuous production of the battery string can be realized.

The invention also aims to provide a method for producing a battery string monomer, which is characterized in that a welding strip is attached and fixed on the back surface of a battery piece by using an adhesive film, so that the problems that the traditional battery piece single-surface welding strip is easy to have poor phenomena such as post-welding battery piece warping and insufficient solder leakage and the like are solved, and meanwhile, the efficient and continuous production of the battery string can be realized.

The invention also aims to provide a battery string production device, which is used for attaching and fixing the welding strip on the back of the battery piece through the adhesive film, so as to solve the problems that the traditional battery piece single-side welding strip is easy to have poor phenomena such as warping of the battery piece after welding, insufficient soldering, missing welding and the like, and simultaneously realize the efficient and continuous production of the battery string.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.

Example one

As shown in fig. 1 to fig. 3, the present embodiment provides a battery string 100, which includes a solder strip 1 and at least two battery pieces 2, wherein both the positive electrode and the negative electrode of each battery piece 2 are located on the back surface, and the solder strip 1 is only disposed on the back surface of each battery piece 2, so as to connect any two adjacent battery pieces 2 in series; the battery string 100 further comprises an adhesive film located on the outermost layer of the back surface of the battery piece 2, the adhesive film is adhered to the back surface of the battery piece 2 so as to fix the welding strip 1 on the grid line of the back surface of the battery piece 2, at this time, the welding strip 1 is located between the adhesive film and the battery piece 2, and the welding strip 1 is electrically connected with the battery piece 2. The welding strips 1 are preferably arranged in a parallel and staggered manner as shown in fig. 1, any welding strip 1 is a welding strip section, and two ends of the welding strip section are connected with the positive electrode and the negative electrode of two adjacent battery pieces 2.

In the present embodiment, the adhesive film is preferably a flexible film with adhesive property, such as a hot-melt adhesive film, which is hot-melt adhered to the back surface of the battery plate 2 by heating and then cooling to solidify, so as to fix the solder strip 1 and the battery plate 2. When the hot melt adhesive film is heated, the heating temperature can be 20-200 ℃. The material of the hot melt adhesive film may be ethylene-vinyl acetate copolymer (EVA for short), polyethylene oxide (POE for short), polyvinylidene chloride (PVD for short), polyamide (PA for short), polyether sulfone resin (PES for short), ethylene-acrylic acid copolymer (PO for short), thermoplastic polyurethane elastomer (TPU for short), polyvinyl butyral (PVB) for short, or the like.

Further, in the present embodiment, the adhesive film may be a continuous adhesive film 3 covering the entire back surface of the battery string 100, that is, the length of the continuous adhesive film 3 is the same as or substantially the same as the length of the battery string 100, and the gap between any two adjacent battery pieces 2 is covered by the continuous adhesive film 3. The integral continuous adhesive film 3 is directly laid on and covers the back of the whole string of battery strings 100, and has the advantages of convenient and fast production and less improvement on the existing equipment.

Further, the adhesive film sheet in this embodiment may further include at least two separated single-piece adhesive film sheets 4. The area relationship between the single-piece adhesive film 4 and the battery piece 2 is different, and the laying manner of the single-piece adhesive film 4 is different, which includes the following cases:

(1) when the area of the single-piece gluing film 4 is larger than that of the single-piece battery piece 2, any one of the single-piece gluing film 4 can cover at least one battery piece 2, generally, one single-piece gluing film 4 covers a plurality of whole battery pieces 2 at the same time, or can cover a part of a subsequent battery piece 2 after covering at least one whole battery piece 2 according to actual conditions. In a whole string of battery cluster, need lay two piece at least monolithic and glue even diaphragm 4, two arbitrary monolithic are glued even diaphragm 4's area and can be the same, also can be different, but the interval setting between two arbitrary adjacent monolithic is glued even diaphragm 4, and the interval that forms between two adjacent monolithic is glued even diaphragm 4 can be located battery piece 2, also can be located the clearance department between two adjacent battery pieces 2.

Generally, the battery pieces 2 are rectangular and are sequentially arranged in series along the width direction, the single-piece adhesive film piece 4 is correspondingly arranged in a rectangular shape, the width of the single-piece adhesive film piece 4 is the same as or slightly shorter than the length of the battery pieces 2, when the battery piece is laid, the short side (i.e. one side in the width direction) of the single-piece adhesive film piece 4 corresponds to the long side of the battery pieces 2, and the long side (i.e. one side in the length direction) of the single-piece adhesive film piece 4 extends along the arrangement direction of the plurality of battery pieces 2, i.e. the single-piece adhesive film piece 4 can cover more than one battery piece 2 in the length direction. The area of the single-piece gluing film 4 is larger than that of the single-piece battery piece 2, and the length of the long side of the single-piece gluing film 4 is larger than that of the short side of the single-piece battery piece 2.

This kind of monolithic formula is glued and is linked diaphragm 4's form that sets up compares above-mentioned whole piece continuous type and glues even diaphragm 3, when having guaranteed to take 1 fixed effect to welding, owing to have the interval of laying, so can save the membrane quantity, and then reduction in production cost.

(2) When the area of the single-piece adhesive film 4 is equal to the area of the single-piece battery piece 2, the single-piece adhesive film 4 is preferably arranged in one-to-one correspondence with the battery pieces 2, that is, one single-piece adhesive film 4 is arranged on each battery piece 2. In this case, the number of the single-piece adhesive film sheets 4 in the whole string of battery cells is the same as the number of the battery sheets 2, and gaps generally exist between the adjacent battery sheets 2, and the existence of the gaps also causes a gap to exist between the adjacent single-piece adhesive film sheets 4, that is, the gap between any two adjacent battery sheets 2 is not covered by the single-piece adhesive film sheet 4.

Generally, the battery pieces 2 are rectangular and are sequentially arranged in series along the width direction, the single-piece adhesive film pieces 4 are correspondingly arranged in a rectangular shape, when the battery pieces are laid, the long edges of the single-piece adhesive film pieces 4 correspond to the long edges of the battery pieces 3, and the short edges of the single-piece adhesive film pieces 4 correspond to the short edges of the battery pieces 3. When the area of the single-piece gluing membrane 4 is equal to that of the single-piece battery piece 2, the length direction of the single-piece gluing membrane 4 is always perpendicular to the extending direction of the welding strip 1.

This kind of monolithic formula is glued and is linked diaphragm 4's form that sets up compares above-mentioned (1) the monolithic formula and glues even diaphragm 4, when having ensured the fixed effect to welding strip 1, owing to lay the spaced quantity and further increase, so can save the membrane quantity more, and then more can reduction in production cost.

(3) When the area of the single-piece adhesive film 4 is smaller than that of the single-piece battery piece 2, one or more than one single-piece adhesive film 4 can be arranged on any one battery piece 2. In general, when the area of the single-piece adhesive film 4 is slightly smaller than that of the single-piece battery piece 2, only one single-piece adhesive film 4 may be disposed on one battery piece 2.

However, when the area of the single-piece adhesive film 4 is greatly different from the area of the single-piece battery piece 2, the single-piece adhesive film 4 is in a strip shape relative to the battery piece 2, and in order to ensure the fixing effect on the welding strip 1, at least two strip-shaped single-piece adhesive films 4 are preferably arranged on any one battery piece 2. Compared with the single-sheet adhesive film 4 in the step (2), the single-sheet adhesive film 4 has the advantages that the fixing effect on the welding strip 1 is ensured, and the number of the laying intervals is further increased, so that the film consumption can be further reduced, and the production cost is further reduced.

In the actual production process, the battery piece 2 is in a rectangular structure, the corresponding single-piece adhesive film piece 4 is also preferably rectangular, in this case, the area of the single-piece adhesive film piece 4 is preferably smaller than or equal to that of the battery piece 2, and the single-piece adhesive film pieces 4 are all laid perpendicular to the welding strips 1, except that the coverage areas of the single-piece adhesive film pieces 4 with different areas to the welding strips 1 are different along the width direction of the battery piece 2.

In addition, the adhesive film sheet of the present embodiment is not limited to the use of hot melt adhesive film, and other types of adhesive films, such as cold adhesive tape, can also be applied to the present embodiment.

Example two

The embodiment provides a battery string monomer 200, which comprises a welding strip 1 and at least two battery pieces 2, wherein the positive electrodes and the negative electrodes of the battery pieces 2 are both positioned on the back surfaces, and the welding strip 1 is only arranged on the back surfaces of the battery pieces 2 so as to connect any two adjacent battery pieces 2 in series; the battery string monomer 200 is including encapsulation section 201 and set up in the overlap joint section 202 of encapsulation section 201 one end at least, and the outmost at the battery string monomer 200 back is provided with glues even diaphragm, glues even diaphragm and preferably adopts hot melt adhesive membrane, wherein:

in the packaging section 201, the adhesive film is connected to the back surface of the battery piece 2 by hot melt adhesive, and the welding strip 1 is fixed on the grid line on the back surface of the battery piece 2, at this time, the welding strip 1 is positioned between the adhesive film and the battery piece 2, and the welding strip 1 is electrically connected with the battery piece 2;

in the overlapping section 202, the adhesive surface of the adhesive film for bonding the battery piece 2 is exposed, and the solder strip 1 extending from the back surface of the battery piece 2 of the packaging section 201 extends to the exposed adhesive surface to overlap with the back surface of the battery piece 2 in the overlapping section 202 of another battery string monomer 200; or, in the overlapping section 202, the back surface of the battery sheet 2 is exposed, and the solder strip 1 extending from the back surface of the battery sheet 2 of the packaging section 201 extends to the back surface of the battery sheet 2 in the overlapping section 202 to overlap with the exposed adhesive film sheet in the overlapping section 202 of another battery string monomer 200.

In this embodiment, the adhesive film may be a continuous adhesive film 3, that is, only one (or one) continuous adhesive film 3 is disposed in a single cell string unit 200. In actual operation, the arrangement of the integral continuous adhesive film 3 is various, and when only one end of the packaging section 201 is provided with the lap joint section 202, the integral continuous adhesive film 3 can only cover all the battery pieces 2 in the packaging section 201, and can also extend to the lap joint section 202 after the packaging section 201 is completely covered; when the two ends of the packaging section 201 are both provided with the overlapping sections 202, the structures of the overlapping sections 202 at the two ends are different in general, as shown in fig. 6, the middle battery string unit 200 among the three battery string units 200 is provided with the battery piece 2 in the overlapping section 202 at one end, and the overlapping section 202 at the other end is provided with the adhesive film, at this time, the whole continuous adhesive film 3 covers the packaging section 201 completely and then extends to one side, so as to form the overlapping section 202 provided with the adhesive film. The integral continuous adhesive film 3 has the advantages of convenient and fast production and little improvement on the prior equipment.

In this embodiment, the adhesive film may further include more than two single-piece adhesive films 4 arranged at intervals, and the corresponding arrangement relationship between the single-piece adhesive film 4 and the battery piece 2 in the packaging section 201 is the same as that in the first embodiment, and is not described herein again; the single-piece adhesive film sheet 4 located in the overlapping section 202 is used for corresponding to the battery sheet 2 in another battery string monomer 200, where "corresponding" specifically means that the single-piece adhesive film sheet 4 of the overlapping section 202 in one battery string monomer 200 is thermally adhered to the battery sheet 2 of the overlapping section 202 in another battery string monomer 200, and the welding strip 1 between the two is fixed in the single-piece adhesive film sheet 4 and the battery sheet 2; the corresponding arrangement relationship between the single-piece adhesive film 4 of the overlapping section 202 in one cell string 200 and the cell 2 of the overlapping section 202 in another cell string 200 is also referred to in the first embodiment, and will not be described herein again.

In the actual production process, the area of the single-piece type gluing film 4 is preferably smaller than or equal to the area of the battery pieces 2, gaps generally exist between the adjacent battery pieces 2, the gaps also exist between the adjacent single-piece type gluing film 4, the gaps between the adjacent battery pieces 2 are covered by the whole-piece type gluing film 3, and the single-piece type gluing film 4 is laid in a sectional mode (or is called as "interval laying") by taking the gaps between the battery pieces 2 as intervals, so that the fixing effect of the welding belt 1 is ensured, the using amount of the gluing film is saved, and the production cost is saved.

In this embodiment, the heating temperature of the adhesive film may be 20-200 ℃. The adhesive film can be made of ethylene-vinyl acetate copolymer (EVA for short), polyethylene oxide (POE for short), polyvinylidene chloride (PVD for short), polyamide (PA for short), polyether sulfone resin (PES for short), ethylene-acrylic acid copolymer (PO for short), thermoplastic polyurethane elastomer (TPU for short) or polyvinyl butyral (PVB for short).

EXAMPLE III

The embodiment provides a method for producing a battery string, which specifically includes the steps of:

s1, paving an adhesive film, wherein the adhesive film is preferably a hot melt adhesive film;

s2, laying a welding strip 1 and a battery piece 2 on the adhesive film, and enabling the welding strip 1 to be located between the back of the battery piece 2 and the adhesive film, wherein the adhesive film is located on the outermost layer of the back of the battery piece 2;

and S3, heating the adhesive film to melt the adhesive film, cooling and solidifying the adhesive film so that the adhesive film is connected to the back of the battery piece 2 through hot melt, and encapsulating the parts of the welding strips 1 corresponding to the adhesive film on grid lines of the battery piece 2 to realize the fixation between the welding strips 1 and the battery piece 2. After the above step S3, the solder strip 1 should be electrically connected to the battery plate 2 to ensure the normal operation of the formed battery string.

In this embodiment, the step S2 adopts a mode that the solder strip 1 and the battery piece 2 are sequentially laid, and specifically includes the steps of:

s21, laying a welding strip 1 on the adhesive film, heating the adhesive film to melt the adhesive film, and cooling and solidifying the adhesive film to ensure that the welding strip 1 is adhered to the adhesive film to form a combined body; wherein, the welding strip 1 is paved at one time or in multiple times;

s22, laying the battery piece 2 on the welding strip 1; wherein, the battery piece 2 is paved at one time or in multiple times.

When the solder strip 1 and the battery piece 2 are sequentially laid in step S2, the adhesive film is heated twice, the solder strip 1 is adhered for the first time, and the battery piece 2 is adhered for the second time.

In this embodiment, step S2 may also adopt a mode of synchronously laying the solder strip 1 and the battery piece 2, specifically: paving the adhesive film sheet as required, and synchronously paving the welding strip 1 and the battery sheet 2 on the adhesive film sheet; the welding strip 1 and the battery piece 2 are synchronously paved at one time, namely the welding strip 1 and the battery piece 2 are integrally paved on the adhesive film at one time according to the length covered by the paved adhesive film. Or, the solder strip 1 and the battery piece 2 may also be laid synchronously in multiple times, that is, the solder strip 1 and the battery piece 2 as a whole are laid on the adhesive film piece by piece until multiple (more than two) sections of the solder strip 1 and the battery piece 2 reach the length covered by the laid adhesive film piece, specifically, referring to fig. 4 and 5, two battery pieces 2 are taken as one section, two battery pieces 2 in the section are connected by the solder strip 1 to form a whole, and the solder strip 1 on the latter battery piece 2 reserves the length connected with the former battery piece 2 in the latter section, fig. 4 is an example in which the solder strip 1 and the battery piece 2 are taken as a whole, three sections are laid continuously on the laid adhesive film piece, fig. 5 is an example in which the solder strip 1 and the battery piece 2 are taken as a whole, and two sections are laid continuously on the laid adhesive film piece.

In this embodiment, when the adhesive film sheet is heated in step S3, the heating temperature is 20 to 200 ℃.

In this embodiment, the adhesive film in step S1 may be a continuous adhesive film 3, or may be two or more single adhesive films 4 arranged at intervals, and the corresponding arrangement relationship between the continuous adhesive film 3 and the single adhesive film 4 and the battery pieces 2 in the battery string is as shown in first embodiment, which is not described herein again.

Example four

The present embodiment provides another method for producing a battery string 100, which is different from the third embodiment in that the present embodiment lays battery pieces 2 first, and specifically includes the following steps:

s1, laying the battery piece 2, and enabling the back of the battery piece 2 to face upwards;

s2, laying a welding strip 1 and an adhesive film on the back surface of the battery piece 2, and enabling the welding strip 1 to be located between the back surface of the battery piece 2 and the adhesive film, wherein the adhesive film is located on the outermost layer of the back surface of the battery piece 2; wherein the adhesive film is preferably a hot melt adhesive film;

and S3, heating the adhesive film to melt the adhesive film, cooling and solidifying the adhesive film so that the adhesive film is attached to the back surface of the battery piece 2 in a hot-melt mode, and fixing the welding strips 1 on the grid lines on the back surface of the battery piece 2. After the above step S3, the solder strip 1 should be electrically connected to the battery plate 2 to ensure the normal operation of the formed battery string.

In this embodiment, the step S2 adopts a mode of sequentially laying the solder strip 1 and the adhesive film, and specifically includes the steps of:

s21, laying welding strips 1 on the battery pieces 2; wherein, the welding strip 1 is paved at one time or in multiple times;

s22, laying the adhesive film piece on the welding strip 1; the adhesive film sheet is integrally laid on the welding strip 1; or the adhesive film is laid on the welding strip 1 at intervals, wherein the adhesive film is laid at one time or at different times.

In this embodiment, the step S2 may also adopt a mode that the solder strip 1 and the adhesive film are laid synchronously, that is, the solder strip 1 and the adhesive film are laid on the battery piece 2 synchronously, wherein the solder strip 1 and the adhesive film are laid synchronously at one time, that is, the solder strip 1 and the adhesive film are laid on the battery piece 2 at one time according to the length covered by the laid battery piece 2 as a whole. Or, the welding strips 1 and the adhesive film sheets are synchronously laid in multiple times, which may be specifically referred to as a way that the welding strips 1 and the battery sheets 2 are integrally laid section by section in the third embodiment, and details are not described here. In practical operation, before the welding strip 1 and the adhesive film sheet are synchronously laid on the battery sheet 2, the following operations can be performed: and laying the welding strip 1 on the adhesive film or covering the adhesive film on the welding strip 1, heating the adhesive film to melt the adhesive film, and cooling and solidifying the adhesive film so that the welding strip 1 is adhered on the adhesive film to form an integral structure. Therefore, when the mode that the welding strip 1 and the adhesive film are laid synchronously is adopted, the whole production method heats the adhesive film twice in sequence, the welding strip 1 is adhered for the first time, and the back surface of the battery piece 2 is adhered for the second time.

In this embodiment, the adhesive film in step S2 may be a continuous adhesive film 3, or may be two or more single adhesive films 4 arranged at intervals, and the corresponding arrangement relationship between the continuous adhesive film 3 and the single adhesive film 4 and the battery pieces 2 in the battery string is as shown in first embodiment, which is not described herein again.

EXAMPLE five

The embodiment provides a method for producing a battery string monomer 200, which specifically includes the steps of:

s1, laying an adhesive film; the adhesive film is preferably a hot melt adhesive film;

s2, laying a solder strip 1 and a battery piece 2 on the adhesive film to form a laying whole, wherein the laying whole is provided with a packaging section 201 and a lap joint section 202 at least arranged at one end of the packaging section 201; wherein,

in the packaging section 201, the solder strip 1 is positioned between the adhesive film sheet and the back surface of the battery sheet 2;

in the lap joint section 202, the gluing surface of the gluing membrane for gluing the battery piece 2 is exposed, and the welding strip 1 extending from the back surface of the battery piece 2 of the packaging section 201 extends to the exposed gluing surface; or, in the overlapping section 202, the back surface of the battery piece 2 is exposed, and the solder strip 1 extending from the back surface of the battery piece 2 of the packaging section 201 extends to the back surface of the battery piece 2 in the overlapping section 202;

s3, heating the adhesive film to melt it, cooling and solidifying to make the adhesive film in the packaging section 201 hot melt adhesive to the back of the battery plate 2, and fixing the welding strip 1 on the grid line of the back of the battery plate 2. After the above step S3, the solder strip 1 should be electrically connected to the battery plate 2 to ensure the normal operation of the formed battery string.

In this embodiment, the battery string unit 200 having the packaging section 201 and the overlapping section 202 at the same time can be used as a single preparation unit, in the single preparation unit, the welding strip 1, the battery piece 2 and the adhesive film piece are simultaneously provided, and in the packaging section 201, the welding strip 1, the battery piece 2 and the adhesive film piece are connected according to a structure that the welding strip 1 is located between the battery piece 2 and the adhesive film piece. Specifically, the adhesive film used in any cell string unit 200 may be a continuous adhesive film 3, or may be two or more single adhesive films 4 arranged at intervals, and the corresponding arrangement relationship between the continuous adhesive film 3 and the single adhesive film 4 and the cell 2 is referred to in the first embodiment, and will not be described herein again. The structure and the arrangement position of the lap joint sections 202 in the battery string single cells 200 are different, and when the battery string single cells 200 are lapped into a string, the positions of the battery string single cells are different, for example, the lap joint sections 202 of the battery string single cells 200 at the head end, the tail end and the middle of the battery string are different. After the lap joint sections 202 of the adjacent battery string monomers 200 are lapped with each other, a battery string series connection link which is provided with a welding strip 1, a battery piece 2 and an adhesive film piece simultaneously and is positioned between the battery piece 2 and the adhesive film piece and formed by connecting the positive and negative electrodes of two battery pieces 2 close to each other in the two adjacent battery string monomers 200 through the welding strip 1 is formed. In practice, at least two battery string cells 200 are connected in series to form a whole battery string 100.

EXAMPLE six

The present embodiment provides another method for producing a battery string unit 200, which is different from the fifth embodiment in that the present embodiment lays a battery piece 2 first, and specifically includes the following steps:

s2, laying a solder strip 1 and an adhesive film sheet on the back of the battery piece 2 to form a laying whole, wherein the laying whole is provided with a packaging section 201 and a lap joint section 202 at least arranged at one end of the packaging section 201, and the adhesive film sheet is preferably a hot melt adhesive film; wherein,

s3, heating the adhesive film to melt it, cooling and solidifying to make the adhesive film in the packaging section 201 hot melt adhesive to the back of the battery plate 2, and fixing the welding strip 1 on the grid line of the back of the battery plate 2. After the above step S3, the solder strip 1 should be electrically connected to the battery piece 2 to ensure the normal operation of the formed battery string.

In this embodiment, the battery string unit 200 having the packaging section 201 and the overlapping section 202 at the same time can be used as a single preparation unit, in the single preparation unit, the welding strip 1, the battery piece 2 and the adhesive film piece are simultaneously provided, and in the packaging section 201, the welding strip 1, the battery piece 2 and the adhesive film piece are connected according to a structure that the welding strip 1 is located between the battery piece 2 and the adhesive film piece. Specifically, the adhesive film sheet used in any cell string unit 200 may be a continuous adhesive film sheet 3, or may be two or more than two single adhesive film sheets 4 arranged at intervals, and the corresponding arrangement relationship between the continuous adhesive film sheet 3 and the single adhesive film sheets 4 and the cell sheet 2 is referred to in the first embodiment, and will not be described herein again. The structure and the arrangement position of the overlapping sections 202 in the battery string units 200 are different, and the positions of the battery string units 200 in the battery string are different when the battery string units 200 are overlapped to form a string, for example, the overlapping sections 202 of the battery string units 200 at the head end, the tail end and the middle of the battery string are different. After the lap joint sections 202 of the adjacent single cells 200 of the battery string are lapped with each other, a battery string series connection link which simultaneously has a welding strip 1, a battery piece 2 and an adhesive film piece and is positioned between the battery piece 2 and the adhesive film piece is formed. The series connection link of the battery string is mainly formed by connecting the positive and negative electrodes of two battery sheets 2 close to each other in two adjacent battery string monomers 200 through a welding strip 1.

In practice, at least two battery string cells 200 are connected in series to form a whole battery string 100.

EXAMPLE seven

The embodiment proposes a method for producing a battery string 100 based on the battery string monomer 200 produced by the method for producing the battery string monomer 200 in the fifth embodiment or the sixth embodiment, wherein the adhesive films preferably adopt hot melt adhesive films, and the method specifically comprises the following steps:

1) the battery string unit 200 is produced by the method for producing the battery string unit 200 according to the fifth embodiment or the sixth embodiment, and the battery string unit 200 has at least three form specifications of a head end unit, a tail end unit and a middle unit, as shown in fig. 6;

2) continuously overlapping the overlapping section 202 of the next battery string monomer 200 with the overlapping section 202 of the previous battery string monomer 200, and ensuring that after the overlapping sections 202 of the adjacent battery string monomers 200 are overlapped, a battery string series connection link which simultaneously comprises a welding strip 1, a battery piece 2 and an adhesive film piece is formed, wherein the welding strip 1 is positioned between the battery piece 2 and the adhesive film piece;

3) heating the adhesive film sheet of the lap joint section 202 to melt the adhesive film sheet, cooling and solidifying the adhesive film sheet so that the adhesive film sheet of the lap joint section 202 in one battery string monomer 200 is connected with the back surface of the battery sheet 2 of the lap joint section 202 in another battery string monomer 200 through hot melt, and fixing the welding strip 1 on the grid line of the back surface of the battery sheet 2; after the step 3), the welding strip 1 should be electrically connected with the battery piece 2 to ensure the normal operation of the formed battery string;

4) and in the process of continuously overlapping the battery string monomers 200 to form the battery string 100, cutting the welding strip 1 at the string interval meeting the requirement to obtain the battery string 100 meeting the length requirement. And two sections formed after the welding strip 1 is cut off extend out of the battery piece 2, so that enough allowance is reserved for interconnection between the battery strings 100 and the battery strings 100.

In this embodiment, when the adhesive film is heated in the step 3), the heating temperature is 20 to 200 ℃.

In actual operation, as shown in fig. 6 and 7, a battery string unit 200 (also referred to as a "string preparing unit") is prepared, and then the prepared battery string unit 200 is transported to the next station, and the next battery string unit 200 is continuously laid next to the overlapping section of the tail end of the previous battery string unit 200, so as to realize continuous production of the battery string. The adhesive film in the battery string unit 200 may be a continuous adhesive film 3 or two or more single adhesive films 4 arranged at intervals, and the corresponding arrangement relationship between the continuous adhesive film 3 and the single adhesive film 4 and the battery piece 2 is described in reference to the first embodiment, and is not described herein again.

Example eight

The embodiment provides a battery string production device 300, which can implement any one of the above battery string production methods and battery string monomer production methods, and mainly comprises a film supply mechanism 5, a sheet supply mechanism 6, a tape supply mechanism 7, a bearing platform 8, a material transfer mechanism 9 and a bonding device, wherein the film supply mechanism 5 is used for supplying a glue film, the sheet supply mechanism 6 is used for supplying a battery sheet 2, the tape supply mechanism 7 is used for supplying a solder strip 1, the glue film preferably adopts a hot melt adhesive film, and the material transfer mechanism 9 can transfer the glue film, the battery sheet 2 and/or the solder strip 1 to the bearing platform 8 and enable the solder strip 1 to be located between the back of the battery sheet 2 and the glue film; the bonding device may be embodied as a heating device 10 for heating the adhesive film so that the adhesive film is hot-melt-adhered to the back surface of the battery plate 2 and the solder strips 1 are fixed to the grid lines of the battery plate 2.

In this embodiment, the heating device 10 may be a heating tube heating device, a laser heating device, an electromagnetic heating device, or the like.

In this embodiment, the film supplying mechanism 5 mainly includes a film roll 51, a film pulling device 52, a film cutting device 53 and a film pressing device 54, wherein the film roll 51 is a bonded film wound into a roll, the film pulling device 52 is used for pulling out the bonded film adaptive to the length of the battery string 100 to be produced from the film roll 51, the film pulling device 52 can usually adopt a clamp, and the clamp can be opened and closed through pneumatic and hydraulic driving so as to clamp and release the bonded film; the film drawing device 52 can be installed on an air cylinder or a linear motor to realize linear motion so as to draw the adhesive film; the film cutting device 53 can cut at least the adhesive film sheet pulled out by the film pulling device 52 from the film roll 51; the film pressing device 54 is used for pressing the adhesive film when the film cutting device 53 cuts the film, a gap is formed between the film pressing device 54 and the film cutting device 53, namely, the film pressing device 54 and the film cutting device 53 are arranged at intervals, after the adhesive film is cut by the film cutting device 53, the film pressing device 54 presses the end part of the adhesive film on the film roll 51, at the moment, the part of the adhesive film on the film roll 51, which extends out of the film pressing device 54, is the adhesive film originally positioned at the gap (namely, the gap between the film pressing device 54 and the film cutting device 53), and the adhesive film is used as the residual edge of the film reserved on the film roll 51, so that the film can be directly pulled by the film pulling device 52 next time, and the continuity of film supply is realized.

In this embodiment, the film supply mechanism 5 further includes a film roll mounting device, and the film roll 21 is rotatably mounted on the film roll mounting device. The film roll mounting device can be a gantry frame structure.

In this embodiment, the film supplying mechanism 5 further includes a film bearing table 55, the film bearing table 55 includes a plurality of separated single units 56 sequentially arranged along the extending direction of the battery string 100 to be produced, and any two adjacent separated single units 56 can relatively slide along the extending direction of the battery string 100 to be produced; and, the front side of any one of the spaced units 56 is provided with a film cutting device 53 to cut the adhesive film into a plurality of single-sheet adhesive films 4. The aforementioned "front side of the pitch unit 56" refers to a side of the pitch unit 56 close to the supply source of the solder ribbon or the adhesive film, and generally, the number of pitch units 56, the number of film cutting devices 53, and the number of single adhesive films 4 to be cut are the same. The single-piece adhesive films 4 may be laid in a one-to-one correspondence with the battery pieces 2, or in a one-to-many (that is, one single-piece adhesive film 4 covers more than one battery piece 2) or many-to-one (that is, one battery piece 2 is cut off and a plurality of single-piece adhesive films 4 are laid at the same time), which may be specifically referred to the corresponding arrangement relationship between the single-piece adhesive films 4 and the battery pieces 2 as exemplified in the first embodiment, and will not be described herein again.

In this embodiment, the film carrier 55 can also serve as the carrier platform 8, and the material transfer mechanism 9 includes the entrainment device 91 and the sheet suction device 92 to transfer the solder strip 1 and the battery sheet 2 onto the film carrier 55.

In this embodiment, the tape supply mechanism 7 mainly includes a solder strip coil 71, a tape drawing device 72 and a tape cutting device 73, wherein the solder strip coil 71 is a solder strip 1 wound into a roll, the tape drawing device 72 is used for drawing the solder strip 1 from the solder strip coil 71, and the tape cutting device 73 is used for cutting the solder strip 1 drawn by the tape drawing device 72 into a solder strip section adapted to the battery string 100 to be produced; the solder strip section is directly laid on the adhesive film, and the material transfer mechanism 9 comprises a sheet suction mechanism to transfer the battery sheet 2 onto the bearing platform 8. The drawstring device 72 can be a clamp which can be opened and closed through pneumatic and hydraulic driving so as to clamp and release the welding strip 1; the belt pulling device 72 can be mounted on a cylinder or a linear motor to realize linear motion so as to pull the welding belt 1.

In actual operation, the film bearing platform 55 in the film supplying mechanism 5 also serves as the bearing platform 8, and the film supplying mechanism 6 and the tape supplying mechanism 7 are respectively located at two sides of the film bearing platform 55 in the film supplying mechanism 5, or the film supplying mechanism 6 and the tape supplying mechanism 7 are arranged at the same side of the film supplying mechanism 5.

In actual operation, the membrane bearing platform 55 and the bearing platform 8 can exist at the same time, the membrane supply mechanism 6 and the belt supply mechanism 7 are respectively positioned at two sides of the bearing platform 8, and the membrane supply mechanism 5 is positioned at one end of the bearing platform 8; or the film feeding mechanism 6 and the tape feeding mechanism 7 are respectively positioned at two sides of the bearing platform 8, and the film feeding mechanism 5 and the film feeding mechanism 6 are positioned at the same side of the bearing platform 8.

The following describes the arrangement of the above-mentioned battery string production apparatuses 300 in this embodiment in detail with reference to the battery string production process.

The material transfer mechanism 9 is located above the bearing platform 8 and can move in a horizontal moving mode, and can carry at least one of the welding strip 1, the battery piece 2 and the adhesive film, and can also carry more than two structures simultaneously, for example, the welding strip 1 and the battery piece 2. The film drawing device 52 can reciprocate in the drawing direction of the adhesive film sheet and is used for drawing one end of the adhesive film sheet to cut the required length; the film cutting device 53 is used for cutting the adhesive film sheet along the width direction; the film pressing device 54 is used for pressing the cut end of the glue supply film, so that the film pulling device 52 can be conveniently butted with one end of the glue supply film next time, and the continuity of the film supply is realized. The bearing platform 8 is used for bearing the battery string 100 or the battery string monomer 200, and a heating device 10 such as a resistance wire and a heating furnace is arranged in the bearing platform 8 for heating the adhesive membrane, so that the welding strip 1 is fixedly connected with the adhesive membrane, or the battery piece 2, the welding strip 1 and the adhesive membrane are fixedly connected. In actual operation, an adsorption unit such as a sucker can be arranged on the bearing platform 8, and the adhesive membrane or the battery piece 2 can be fixed.

The material transfer mechanism 9 comprises a clamping belt device 91 and a sheet suction device 92, both the clamping belt device 91 and the sheet suction device 92 can adopt manipulator structures, the clamping belt device 91 and the sheet suction device 92 can respectively translate above the bearing platform 8 and can lift up and down, the sheet suction device 92 is provided with a sucker, used for carrying the battery piece 2, the clamping device 91 is used for carrying the welding strip 1 and can clamp at least two points on the same welding strip 1, the clamping device 91 firstly clamps the welding strip 1 on the adhesive film of the bearing platform 8 to be contacted with the adhesive film, the heating device 10 heats to fix the welding strip 1 on the adhesive film, then the sheet sucking device 92 grabs the battery sheet 2 above the welding strip 1 on the bearing platform 8, the back side of the battery sheet 2 is close to the upper surface of the welding strip 1, the heating device 10 carries out secondary heating on the adhesive film sheet, and the battery sheet 2, the welding strip 1 and the adhesive film sheet are fixed.

When the welding strip 1 and the battery piece 2 are required to be placed on the adhesive film piece at the same time, the clamping device 91 clamps the welding strip 1 and is located below the suction device 92, the suction device 92 can lift up and down to grab the battery piece 2, in operation, the material transfer mechanism 9 carries the battery piece 2 firstly and then carries the welding strip 1, so that the battery piece 2 is located above the welding strip 1, the limit of the back side of the battery piece 2 is close to the upper surface of the welding strip 1, then the material transfer mechanism 9 carries the battery piece 2 and the welding strip 1 at the same time and is placed above the adhesive film piece of the bearing platform 8, after the welding strip 1 is contacted with the adhesive film piece, the heating device 10 heats the adhesive film piece, and meanwhile, the battery piece 2, the welding strip 1 and the adhesive film piece are fixed.

In this embodiment, the structure of the film cutting device 53 is as shown in fig. 17 and fig. 18, wherein the film cutting device 53 in fig. 17 is located below the bearing platform 8, the cutting knife 531 is a circular cutting knife, and can rotate around the installation shaft, and the installation shaft can drive the cutting knife 531 to move up and down, when cutting the adhesive film, the installation shaft moves up and rotates under the driving of a driving mechanism such as a motor, and after contacting the adhesive film, the installation shaft moves in the cutting direction of the adhesive film, so as to cut the adhesive film. Because the gluing diaphragm can have elastic or plastic deformation when the force is applied, in order to cut off the gluing diaphragm more stably and ensure the smoothness and the aesthetic property of the cutting edge of the gluing diaphragm, the film pressing device 54 is used for pressing the cutting edge of the gluing diaphragm while the film is cut. The cutting blade 531 of the film cutting device 53 shown in fig. 18 is a blade having a width greater than or equal to the width of the adhesive film, and can be lifted and lowered under the driving action of a lifting and lowering driving mechanism such as a hydraulic cylinder and a screw slider mechanism. In order to cut the adhesive film more stably, the film pressing device 54 is used to press the adhesive film above the adhesive film while cutting the adhesive film, and the cutter 531 is lifted to abut against the lower surface of the film pressing device 54 to cut the adhesive film. The film pressing device 54 may be a long plastic block.

When the diaphragm width is less than single battery piece 2, glue even the diaphragm and adopt the monolithic formula to glue even when diaphragm 4 promptly, need will cut each monolithic formula glue even carry out the branch apart distance between the diaphragm 4 for the monolithic formula glues even the position of diaphragm 4 and the position one-to-one setting of battery piece 2, the quantity of membrane in a battery cluster can effectively be practiced thrift to this mode, has reduced battery pack's cost of manufacture. Wherein, what adopt when carrying out the minute distance to each monolithic is glued even piece 4 is diaphragm plummer 55, and it includes a plurality of minute distance monomers 56, and monolithic is glued even piece 4 and is cut the shaping back on diaphragm plummer 55, and each minute distance monomer 56 all moves to the direction of keeping away from film book 51, makes and forms the interval between the adjacent minute distance monomer 56. The individual spacing 56 is preferably of a plate structure, each individual spacing 56 is connected with a hydraulic cylinder, a telescopic rod and other length adjusting mechanisms to control the individual spacing 56 to move, when the hydraulic cylinder, the telescopic rod and other length adjusting mechanisms extend, each individual spacing 56 can be driven to expand, when the hydraulic cylinder, the telescopic rod and other length adjusting mechanisms contract, each individual spacing 56 can be driven to contract, and the top surfaces of the individual spacing 56 are spliced to form a complete and seamless membrane bearing table 55 table.

Specifically, each of the index units 56 may be movably guided by a slide rail and slider assembly. Meanwhile, since the film carrier 55 can also serve as the carrier platform 8, suction units such as suction cups may be provided on the individual pitch units 56 to fix the adhesive film or the battery cells 2. The film cutting device 53 is provided with cutters 531 in accordance with the number of the separated single bodies 56 in parallel, after the film cutting device 53 cuts the adhesive film into a plurality of films, the separated single bodies 56 synchronously move to one side to uniformly distribute the space between the films, then the welding strip 1 and the battery piece 2 are synchronously or sequentially placed on the films through the material transfer mechanism 9, heating devices 10 such as resistance wires and the like can be arranged on the separated single bodies 56, and the heating devices 10 heat the films, so that the welding strip 1 is fixed on the corresponding grid line on the back of the battery piece 2 to form a whole string of battery strings 100 or a battery string unit 200.

The material transfer mechanism 9 in this embodiment may be provided with two sets, one set is used to transport the battery piece 2 to the carrying platform 8 first, the other set is used to transport the prepared welding strip 1 and the adhesive film (the whole continuous adhesive film 3 or a plurality of single adhesive films 4) to the battery piece 2 synchronously, and the material transfer mechanism 9 capable of clamping the adhesive film is provided with a film suction device, such as a suction cup; the film suction device can be lifted or fixed together by heating the welding strip 1 and the adhesive film sheet through a heating device 10 on the bearing platform 8, then the welding strip 1 and the adhesive film sheet which are fixedly connected are conveyed to the upper surface of the battery sheet 2 through a material transfer mechanism 9 with the film suction device, so that the welding strip 1 is contacted with the battery sheet 2, the heating device 10 on the bearing platform 8 heats the adhesive film sheet, and the adhesive film sheet is fixedly connected with the welding strip 1 and the battery sheet 2 to form a whole series of battery strings 100 or a battery string unit 200.

The material transfer mechanism 9 in this embodiment is preferably a manipulator structure, and the movement of the material transfer mechanism 9 relative to the bearing platform 8 can be realized by a wire gauge, a hydraulic cylinder, a linear motor and the like.

In this embodiment, the tape supply mechanism 7 can satisfy the continuous preparation of the solder tape 1 corresponding to a whole string of battery strings 100 or one battery string unit 200; the film supply mechanism 5 can continuously prepare a whole continuous adhesive film 3 or a plurality of single adhesive films 4 with the length required by a whole battery string 100 or a battery string unit 200; the sheet supply mechanism 6 can supply the battery sheets 2 required for completing interconnection of the battery strings 100, including supply of a single battery sheet 2, or synchronously feed and transmit a plurality of cut battery sheets 2 to a position to be grabbed of the material transfer mechanism 9; according to the difference in distribution of the material transfer mechanism 9, the tape supply mechanism 7, the film supply mechanism 5, the sheet supply mechanism 6 and the carrying platform 8, the production method of the battery string 100 is also different:

as shown in fig. 12, the welding strip 1 and the adhesive film sheet are synchronously and continuously prepared, the preparation of the welding strip 1 and the preparation of the adhesive film sheet are correspondingly arranged up and down, wherein a heating device 10 is arranged in the bearing platform 8, the welding strip 1 is prepared and placed on the adhesive film sheet while the film is prepared, firstly, the welding strip 1 and the adhesive film sheet are fixedly connected, the battery sheet 2 can be continuously placed on the welding strip 1 of the bearing platform 8 by a single sheet, and the adhesive film sheet is heated by the heating device 10 after a plurality of sheets are synchronously transported to the welding strip 1, so that the battery sheet 2, the welding strip 1 and the adhesive film sheet are fixedly connected.

As shown in fig. 13, the tape supply mechanism 7 and the film supply mechanism 6 are respectively located at two sides of the film supply mechanism 5, the adhesive film is cut on the film carrier 55 of the film supply mechanism 5, and the film carrier 55 at this time also serves as the carrier platform 8. Material transfer mechanism 9 can slide in the direction of extension of perpendicular to diaphragm plummer 55, and smuggle device 91 and inhale piece device 92 and dispose lifting unit respectively secretly, smuggle device 91 earlier and grab to glue on the diaphragm plummer 55 from one side of diaphragm plummer 55 welding area 1 on even the diaphragm, heating device 10 heats even the diaphragm, will weld area 1 and glue even diaphragm fixed connection in the time, inhale piece device 92 and grab battery piece 2 and place on welding area 1, heating device 10 heats even the diaphragm once more gluing, make even the diaphragm and the adhesion of the 2 backs of battery piece, thereby form the battery cluster.

As shown in fig. 14, the tape supply mechanism 7 and the film supply mechanism 6 are located on the same side of the film supply mechanism 5, the material transfer mechanism 9 can grab both the battery piece 2 and the solder tape 1, and the film bearing table 55 at this time is also used as the bearing platform 8 and can be used for laying adhesive films and heating adhesive films. In the process of laying and cutting the adhesive film on the film bearing platform 55, the material transfer mechanism 9 can firstly grab the battery piece 2 and then grab the welding strip 1, at the moment, the battery piece 2 is correspondingly arranged above the welding strip 1, subsequently, the material transfer mechanism 9 synchronously carries the welding strip 1 and the battery piece 2 to the upper surface of the adhesive film of the film bearing platform 55 and descends to the moment that the welding strip 1 is in contact with the adhesive film, the heating device 10 heats the adhesive film at the moment, so that the battery piece 2, the welding strip 1 and the adhesive film are simultaneously and fixedly connected, and finally, the material transfer mechanism 9 releases the welding strip 1 and the battery piece 2 to form a battery string.

As shown in fig. 15, the film supplying mechanism 5 may be a separate film preparing line, and is located at the front end of the carrying platform 8, and the tape supplying mechanism 7 and the sheet supplying mechanism 6 are respectively located at both sides of the carrying platform 8. The material transfer mechanism 9 first grabs the cut adhesive film onto the bearing platform 8, and then grabs the welding strip 1 onto the adhesive film of the bearing platform 8 from one side of the bearing platform 8; heating device 10 on load-bearing platform 8 heats gluey diaphragm for the first time, will weld area 1 and gluey diaphragm fixed connection in, material transfer mechanism 9 snatchs battery piece 2 and places on load-bearing platform 8 welds area 1, and heating device 10 heats gluey diaphragm once more, makes gluey diaphragm and the 2 surface adhesions of battery piece to form the battery cluster.

As shown in fig. 16, the film supply mechanism 5 and the film supply mechanism 6 are located on one side of the carrying platform 8, the tape supply mechanism 7 is located on the other side of the carrying platform 8, the material transfer mechanism 9 can slide not only in a direction perpendicular to the extending direction of the material transfer mechanism 9, but also in the extending direction of the material transfer mechanism 9, and the battery piece 2 and the adhesive film can be carried. Firstly, a material transfer mechanism 9 conveys a cut adhesive film piece to a bearing platform 8, then a tape supply mechanism 7 conveys a prepared welding tape 1 to the adhesive film piece on the bearing platform 8, and a heating device 10 on the bearing platform 8 heats the adhesive film piece to fixedly connect the welding tape 1 and the adhesive film piece; meanwhile, after the material transfer mechanism 9 has carried the battery piece 2 to one side of the bearing platform 8 to wait for carrying the material transfer mechanism 9 of the welding strip 1 to return, the upper space of the bearing platform 8 is avoided, then the battery piece 2 is placed above the welding strip 1 of the bearing platform 8 by translating to the upper side of the bearing platform 8, the heating device 10 heats again, the battery piece 2 is bonded with the adhesive membrane, and the welding strip 1 is fixed on the battery piece 2 correspondingly.

Therefore, the battery string provided by the technical scheme fixes the welding strips on the grid lines on the back surface of the battery piece in a mode that the adhesive film is connected to the back surface of the battery piece through hot melt adhesive. The glue film piece of here makes the glue solution melt through the heating, makes the glue solution solidification after the cooling, consequently makes and forms firm bonding between the back of glue film (gluing even face promptly) and battery piece, realizes welding the fixed of area and battery piece, and fixed mode is firm, has not only solved battery piece back face welding and has welded the area, the problem of bad phenomena such as easy emergence postweld battery piece warpage and rosin joint hourglass welding, has effectively protected the back of area and battery piece moreover, is favorable to promoting the life of battery cluster.

The production method of the battery string comprises two production modes of firstly laying the adhesive film and firstly laying the battery piece, wherein the production mode of firstly laying the adhesive film also comprises two modes of successively laying the welding strip and the battery piece and synchronously laying the welding strip and the battery piece, the two modes of integrally laying the adhesive film and separately laying the single piece are covered in the successive laying or synchronous laying of the welding strip and the battery piece, and the two modes of finishing one-time laying and finishing the laying in different times are also included in the laying of the adhesive film; similarly, the production mode of firstly laying the battery piece also comprises two modes of successively laying the welding strip and the adhesive film piece and synchronously laying the welding strip and the adhesive film piece, the two modes of integrally laying the adhesive film piece and separately laying the single piece are covered in both the successive laying and the synchronous laying of the welding strip and the adhesive film piece, and the two modes of completing one-time laying and completing repeated laying are also included in the laying of the adhesive film piece; the production method of the battery string is simple and convenient to operate, various in form, capable of meeting different production requirements in various production forms and high in practicability.

The battery string monomer provided by the technical scheme fixes the welding strip on the grid line on the back surface of the battery piece in a mode that the adhesive film is connected to the back surface of the battery piece through hot melt adhesive. Meanwhile, the battery string monomers adopt a mode of combining the packaging section and the lap joint section, so that the battery string monomers can be continuously lapped and strung, and further, the efficient and continuous production of the battery string is realized.

The production method of the battery string monomer provided by the technical scheme can produce various battery string monomers with different lap joint sections, can realize continuous lap joint and string formation among the battery string monomers, and is beneficial to realizing efficient and continuous production of the battery string.

The technical scheme also provides a battery string production method based on the battery string monomers, and the battery string monomers with different lap joint sections are utilized, so that the battery string monomers can be continuously lapped and strung, and further, the efficient and continuous production of the battery string is realized.

In the battery string and the battery string monomer provided by the technical scheme, the structural form of the integral continuous adhesive connecting membrane and the single-chip adhesive connecting membrane (or called as a sectional adhesive connecting membrane) is adopted, wherein the integral continuous adhesive connecting membrane is directly laid and covered on the back of the whole string of battery strings or the whole string of battery string units, and the battery string monomer have the advantages of convenience and quickness in production and less improvement on the existing equipment; the single-chip type gluing diaphragm (or sectional type gluing diaphragm) is arranged in one-to-one correspondence with the battery pieces, the area of the single-chip type gluing diaphragm is smaller than or equal to the area of the battery pieces, the whole continuous type gluing diaphragm covers gaps between adjacent battery pieces, and the single-chip type gluing diaphragm is laid in a sectional type mode by taking the gaps between the battery pieces as intervals, so that the fixing effect of a welding belt is ensured, the using amount of the gluing diaphragm is saved, and the production cost is saved.

The battery string production equipment provided by the technical scheme can implement any one of the above battery string production methods and the battery string monomer production method. In the technical scheme, the film supply mechanism, the tape supply mechanism and the bearing platform are arranged in different directions, so that the battery string production method or the battery string monomer production method with different process steps can be realized, and the film supply mechanism, the tape supply mechanism and the bearing platform are various in forms and flexible to use.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not to be construed as limiting the claims.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims

1. The utility model provides a battery cluster, is including welding area (1) and two at least battery pieces (2), weld area (1) only set up in the back of battery piece (2) is with arbitrary adjacent two battery piece (2) are established ties, its characterized in that, still including being located the outermost diaphragm that links of battery piece (2) back, it bonds in to link the diaphragm the back of battery piece (2), in order to incite somebody to action weld area (1) and be fixed in on the grid at the back of battery piece (2).

2. The battery string according to claim 1, wherein the adhesive film is a continuous adhesive film (3) covering the entire back surface of the battery string, and a gap between any two adjacent battery pieces (2) is covered by the continuous adhesive film (3).

3. The battery string according to claim 1, wherein the adhesive membrane sheet comprises at least two discretely arranged one-piece adhesive membrane sheets (4).

4. The battery string according to claim 3, wherein the area of the single-piece adhesive film (4) is smaller than or equal to the area of the battery piece (2).

5. The battery string according to any one of claims 1 to 4, wherein the adhesive film is a hot melt adhesive film, and the hot melt adhesive film is hot melt adhesive-bonded to the back surface of the battery piece (2).

6. The utility model provides a battery cluster monomer, is including welding area (1) and two at least battery pieces (2), weld area (1) only set up in the back of battery piece (2), in order to will arbitrary adjacent two battery piece (2) are established ties, its characterized in that, battery cluster monomer (200) including encapsulation section (201) with set up at least in overlap joint section (202) of encapsulation section (201) one end, the outmost at battery cluster monomer (200) back is provided with glues even diaphragm, wherein:

in the packaging section (201), the adhesive film is adhered to the back surface of the battery piece (2), and the welding strip (1) is fixed on a grid line on the back surface of the battery piece (2);

in the lap joint section (202), the gluing surface of the gluing membrane for gluing the battery piece (2) is exposed, and the welding strip (1) extending from the back surface of the battery piece (2) of the packaging section (201) extends to the exposed gluing surface to lap joint with the back surface of the battery piece (2) in the lap joint section (202) of another battery string monomer (200);

or in the overlapping section (202), the back surface of the battery piece (2) is exposed, and the welding strip (1) extending from the back surface of the battery piece (2) of the packaging section (201) extends to the back surface of the battery piece (2) in the overlapping section (202) to overlap with the adhesive film piece exposed in the overlapping section (202) of another battery string monomer (200).

7. The battery string cell according to claim 6, wherein the adhesive film is a one-piece continuous adhesive film (3).

8. The battery string cell according to claim 6, wherein the adhesive membrane sheet comprises at least two discretely arranged one-piece adhesive membrane sheets (4).

9. A method of producing a string of cells, comprising the steps of:

s1, laying an adhesive film;

s2, laying a welding strip (1) and a battery piece (2) on the gluing film, and enabling the welding strip (1) to be located between the back of the battery piece (2) and the gluing film;

and S3, carrying out bonding treatment on the adhesive film so as to enable the adhesive film to be bonded on the back surface of the battery piece (2), and fixing the welding strip (1) on the grid line on the back surface of the battery piece (2).

10. The battery string production method according to claim 9, wherein the step S2 includes the steps of:

s21, laying the welding strip (1) on the gluing film; wherein the welding strip (1) is paved at one time or in multiple times;

s22, laying the battery piece (2) on the gluing membrane; and the battery pieces are paved at one time or in multiple times.

11. The method for producing a battery string according to claim 10, wherein the adhesive film is a hot-melt adhesive film, and further comprising, between the step S21 and the step S22:

s211, heating the hot melt adhesive film, and then cooling and solidifying to enable the welding strip (1) to be glued on the hot melt adhesive film.

12. The method for producing a battery string according to claim 9, wherein the step S2 is: synchronously laying the welding strip (1) and the battery piece (2) on the gluing membrane; the welding strip (1) and the battery piece (2) are synchronously paved at one time, or the welding strip (1) and the battery piece (2) are synchronously paved at different times.

13. The method according to any one of claims 9 to 12, wherein the adhesive film in step S1 is a continuous adhesive film (3), and the length of the continuous adhesive film (3) is adapted to the overall length of the battery string to be produced;

or, the adhesive film sheet in the step S1 comprises at least two separated single-piece adhesive film sheets (4).

14. A method of producing a string of cells, comprising the steps of:

s1, laying the battery piece (2) and enabling the back surface of the battery piece (2) to face upwards;

s2, laying a welding strip (1) and an adhesive film on the back surface of the battery piece (2), and enabling the welding strip (1) to be located between the back surface of the battery piece (2) and the adhesive film;

15. The battery string production method according to claim 14, wherein the step S2 includes the steps of:

s21, paving the welding strip (1) on the battery piece (2); wherein the welding strip (1) is paved at one time or in multiple times;

s22, laying the adhesive film piece on the welding strip (1); wherein, the adhesive film piece is paved at one time or in multiple times.

16. The method for producing a battery string according to claim 14, wherein the step S2 is:

synchronously paving the welding strip (1) and the adhesive film sheet on the battery sheet (2); the welding strip (1) and the adhesive film are synchronously laid at one time, or the welding strip (1) and the adhesive film are synchronously laid in multiple times.

17. The method for producing the battery string according to claim 16, wherein the adhesive film is a hot-melt adhesive film, and before the welding strip (1) and the hot-melt adhesive film are synchronously laid on the battery piece (2), the method further comprises the following steps:

s211, laying the welding strip (1) on the hot melt adhesive film, or enabling the hot melt adhesive film to be covered on the welding strip (1), heating the hot melt adhesive film, and then cooling and solidifying to enable the welding strip (1) to be glued on the hot melt adhesive film.

18. The method according to any one of claims 14 to 17, wherein the adhesive film in step S2 is a continuous adhesive film (3), and the length of the continuous adhesive film (3) is adapted to the overall length of the battery string to be produced;

or, the adhesive film sheet in the step S2 comprises at least two separated single-piece adhesive film sheets (4).

19. A method for producing a battery string monomer is characterized by comprising the following steps:

s1, paving an adhesive film;

s2, laying a welding strip (1) and a battery piece (2) on the adhesive film to form a laying whole, wherein the laying whole is provided with a packaging section (201) and a lap joint section (202) at least arranged at one end of the packaging section (201); wherein,

in the packaging section (201), the welding strip (1) is positioned between the gluing film sheet and the back surface of the battery sheet (2);

in the overlapping section (202), the gluing surface of the gluing membrane for gluing the battery piece (2) is exposed, and the welding strip (1) extending out of the back surface of the battery piece (2) of the packaging section (201) extends to the exposed gluing surface; or, in the overlapping section (202), the back surface of the battery piece (2) is exposed, and the welding strip (1) extending from the back surface of the battery piece (2) of the packaging section (201) extends to the back surface of the battery piece (2) in the overlapping section (202);

step S3, carrying out bonding treatment on the adhesive film so as to enable the adhesive film in the packaging section (201) to be bonded on the back surface of the battery piece (2), and fixing the welding strip (1) on the grid line of the back surface of the battery piece (2).

20. A method for producing a battery string monomer is characterized by comprising the following steps:

s2, laying a solder strip (1) and an adhesive film sheet on the back of the battery sheet (2) to form a laying whole, wherein the laying whole is provided with a packaging section (201) and a lap joint section (202) at least arranged at one end of the packaging section (201); wherein,

21. A method of producing a string of cells, comprising the steps of:

1) producing the battery string cell (200) using the battery string cell production method as defined in claim 19 or 20;

2) continuously overlapping the overlapping section (202) of the next battery string monomer (200) with the overlapping section (202) of the previous battery string monomer (200);

3) bonding the adhesive film sheet of the lap joint section (202) so that the adhesive film sheet of the lap joint section (202) in one battery string monomer (200) is bonded to the back surface of the battery sheet (2) of the lap joint section (202) in the other battery string monomer (200), and fixing the welding strip (1) on a grid line of the back surface of the battery sheet (2);

4) and in the process of continuously overlapping the battery string monomers (200) to form the battery string, cutting off the welding strip (1) at the string interval meeting the requirement to obtain the battery string meeting the length requirement.

22. A battery string production apparatus, characterized by comprising:

a film supply mechanism (5) for supplying the adhesive film sheet;

a sheet supply mechanism (6) for supplying the battery sheet (2);

a tape supply mechanism (7) for supplying the solder tape (1);

a load-bearing platform (8);

the material transfer mechanism (9) can transfer the gluing membrane, the battery piece (2) and/or the welding strip (1) to the bearing platform (8), and the welding strip (1) is located between the back surface of the battery piece (2) and the gluing membrane;

and the bonding device is used for bonding the adhesive film piece to the back surface of the battery piece (2) so as to fix the welding strip (1) on the grid line of the battery piece (2).

23. The battery string production apparatus according to claim 22, wherein the film supply mechanism (5) comprises:

the film roll (51), the film roll (51) is a glued membrane wound into a roll;

the film drawing device (52) is used for drawing out the adhesive film sheets matched with the length of the battery string to be produced from the film roll (51);

a film cutting device (53) capable of cutting at least the adhesive film sheet pulled out by the film pulling device (52) from the film roll (51);

film pressing device (54), be used for cut film device (53) and compress tightly when cutting the membrane glue even diaphragm, just film pressing device (54) with cut and have the gap between film device (53), so that glue even diaphragm and cut off the back, it is convenient for to reserve on film book (51) draw the diaphragm remainder of membrane device (52) next time.

24. The battery string production equipment according to claim 23, wherein the film supply mechanism (5) further comprises a film bearing table (55), the film bearing table (55) comprises a plurality of spaced single units (56) which are sequentially arranged along the extending direction of the battery string to be produced, and any two adjacent spaced single units (56) can relatively slide along the extending direction of the battery string to be produced; and the front side of any one of the spacing monomers (56) is provided with the film cutting device (53) so as to cut the adhesive film into a plurality of single-piece adhesive films (4).

25. The battery string production apparatus according to claim 24, wherein the film carrier (55) doubles as the carrier platform (8), and the material transfer mechanism (9) comprises an entrainment device (91) and a sheet suction device (92) to transfer the solder ribbon (1) and the battery sheet (2) onto the film carrier (55).

26. The battery string production apparatus according to claim 24, wherein the film carrier (55) doubles as the carrier platform (8), and the tape supply mechanism (7) comprises:

the welding strip coil (71), wherein the welding strip coil (71) is a welding strip (1) wound into a coil;

a tape pulling device for pulling out the solder tape (1) from the solder tape roll (71);

the belt cutting device is used for cutting the welding belt (1) pulled out by the belt pulling device into a welding belt section matched with the battery string to be produced;

the welding strip section is directly laid on the adhesive film, and the material transfer mechanism (9) comprises a sheet suction device (92) so as to transfer the battery sheet (2) onto the bearing platform (8).

27. The battery string production apparatus according to claim 22 or 23, wherein the sheet supply mechanism (6) and the tape supply mechanism (7) are respectively located at both sides of the carrying platform (8), and the film supply mechanism (5) is located at one end of the carrying platform (8);

or the film supply mechanism (6) and the tape supply mechanism (7) are respectively positioned at two sides of the bearing platform (8), and the film supply mechanism (5) and the film supply mechanism (6) are positioned at the same side of the bearing platform (8);

or the film supply mechanism (5) is also used as the bearing platform (8), and the film supply mechanism (6) and the tape supply mechanism (7) are respectively positioned at two sides of the film supply mechanism (5);

or the film supply mechanism (6) and the tape supply mechanism (7) are arranged on the same side of the film supply mechanism (5).